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
))
989 nfs4_schedule_state_recovery(clp
);
996 * reclaim state on the server after a network partition.
997 * Assumes caller holds the appropriate lock
999 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1001 struct nfs4_opendata
*opendata
;
1004 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1005 if (IS_ERR(opendata
))
1006 return PTR_ERR(opendata
);
1007 ret
= nfs4_open_recover(opendata
, state
);
1009 d_drop(ctx
->path
.dentry
);
1010 nfs4_opendata_put(opendata
);
1014 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1016 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1017 struct nfs4_exception exception
= { };
1021 err
= _nfs4_open_expired(ctx
, state
);
1022 if (err
== -NFS4ERR_DELAY
)
1023 nfs4_handle_exception(server
, err
, &exception
);
1024 } while (exception
.retry
);
1028 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1030 struct nfs_open_context
*ctx
;
1033 ctx
= nfs4_state_find_open_context(state
);
1035 return PTR_ERR(ctx
);
1036 ret
= nfs4_do_open_expired(ctx
, state
);
1037 put_nfs_open_context(ctx
);
1042 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1043 * fields corresponding to attributes that were used to store the verifier.
1044 * Make sure we clobber those fields in the later setattr call
1046 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1048 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1049 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1050 sattr
->ia_valid
|= ATTR_ATIME
;
1052 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1053 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1054 sattr
->ia_valid
|= ATTR_MTIME
;
1058 * Returns a referenced nfs4_state
1060 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1062 struct nfs4_state_owner
*sp
;
1063 struct nfs4_state
*state
= NULL
;
1064 struct nfs_server
*server
= NFS_SERVER(dir
);
1065 struct nfs_client
*clp
= server
->nfs_client
;
1066 struct nfs4_opendata
*opendata
;
1069 /* Protect against reboot recovery conflicts */
1071 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1072 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1075 status
= nfs4_recover_expired_lease(server
);
1077 goto err_put_state_owner
;
1078 if (path
->dentry
->d_inode
!= NULL
)
1079 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1080 down_read(&clp
->cl_sem
);
1082 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1083 if (opendata
== NULL
)
1084 goto err_release_rwsem
;
1086 if (path
->dentry
->d_inode
!= NULL
)
1087 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1089 status
= _nfs4_proc_open(opendata
);
1091 goto err_opendata_put
;
1093 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1094 nfs4_exclusive_attrset(opendata
, sattr
);
1096 state
= nfs4_opendata_to_nfs4_state(opendata
);
1097 status
= PTR_ERR(state
);
1099 goto err_opendata_put
;
1100 nfs4_opendata_put(opendata
);
1101 nfs4_put_state_owner(sp
);
1102 up_read(&clp
->cl_sem
);
1106 nfs4_opendata_put(opendata
);
1108 up_read(&clp
->cl_sem
);
1109 err_put_state_owner
:
1110 nfs4_put_state_owner(sp
);
1117 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1119 struct nfs4_exception exception
= { };
1120 struct nfs4_state
*res
;
1124 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1127 /* NOTE: BAD_SEQID means the server and client disagree about the
1128 * book-keeping w.r.t. state-changing operations
1129 * (OPEN/CLOSE/LOCK/LOCKU...)
1130 * It is actually a sign of a bug on the client or on the server.
1132 * If we receive a BAD_SEQID error in the particular case of
1133 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1134 * have unhashed the old state_owner for us, and that we can
1135 * therefore safely retry using a new one. We should still warn
1136 * the user though...
1138 if (status
== -NFS4ERR_BAD_SEQID
) {
1139 printk(KERN_WARNING
"NFS: v4 server %s "
1140 " returned a bad sequence-id error!\n",
1141 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1142 exception
.retry
= 1;
1146 * BAD_STATEID on OPEN means that the server cancelled our
1147 * state before it received the OPEN_CONFIRM.
1148 * Recover by retrying the request as per the discussion
1149 * on Page 181 of RFC3530.
1151 if (status
== -NFS4ERR_BAD_STATEID
) {
1152 exception
.retry
= 1;
1155 if (status
== -EAGAIN
) {
1156 /* We must have found a delegation */
1157 exception
.retry
= 1;
1160 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1161 status
, &exception
));
1162 } while (exception
.retry
);
1166 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1167 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1168 struct nfs4_state
*state
)
1170 struct nfs_server
*server
= NFS_SERVER(inode
);
1171 struct nfs_setattrargs arg
= {
1172 .fh
= NFS_FH(inode
),
1175 .bitmask
= server
->attr_bitmask
,
1177 struct nfs_setattrres res
= {
1181 struct rpc_message msg
= {
1182 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1187 unsigned long timestamp
= jiffies
;
1190 nfs_fattr_init(fattr
);
1192 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1193 /* Use that stateid */
1194 } else if (state
!= NULL
) {
1195 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1197 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1199 status
= rpc_call_sync(server
->client
, &msg
, 0);
1200 if (status
== 0 && state
!= NULL
)
1201 renew_lease(server
, timestamp
);
1205 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1206 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1207 struct nfs4_state
*state
)
1209 struct nfs_server
*server
= NFS_SERVER(inode
);
1210 struct nfs4_exception exception
= { };
1213 err
= nfs4_handle_exception(server
,
1214 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1216 } while (exception
.retry
);
1220 struct nfs4_closedata
{
1222 struct inode
*inode
;
1223 struct nfs4_state
*state
;
1224 struct nfs_closeargs arg
;
1225 struct nfs_closeres res
;
1226 struct nfs_fattr fattr
;
1227 unsigned long timestamp
;
1230 static void nfs4_free_closedata(void *data
)
1232 struct nfs4_closedata
*calldata
= data
;
1233 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1235 nfs4_put_open_state(calldata
->state
);
1236 nfs_free_seqid(calldata
->arg
.seqid
);
1237 nfs4_put_state_owner(sp
);
1238 path_put(&calldata
->path
);
1242 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1244 struct nfs4_closedata
*calldata
= data
;
1245 struct nfs4_state
*state
= calldata
->state
;
1246 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1248 if (RPC_ASSASSINATED(task
))
1250 /* hmm. we are done with the inode, and in the process of freeing
1251 * the state_owner. we keep this around to process errors
1253 switch (task
->tk_status
) {
1255 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1256 renew_lease(server
, calldata
->timestamp
);
1258 case -NFS4ERR_STALE_STATEID
:
1259 case -NFS4ERR_EXPIRED
:
1262 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1263 rpc_restart_call(task
);
1267 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1270 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1272 struct nfs4_closedata
*calldata
= data
;
1273 struct nfs4_state
*state
= calldata
->state
;
1274 int clear_rd
, clear_wr
, clear_rdwr
;
1276 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1279 clear_rd
= clear_wr
= clear_rdwr
= 0;
1280 spin_lock(&state
->owner
->so_lock
);
1281 /* Calculate the change in open mode */
1282 if (state
->n_rdwr
== 0) {
1283 if (state
->n_rdonly
== 0) {
1284 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1285 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1287 if (state
->n_wronly
== 0) {
1288 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1289 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1292 spin_unlock(&state
->owner
->so_lock
);
1293 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1294 /* Note: exit _without_ calling nfs4_close_done */
1295 task
->tk_action
= NULL
;
1298 nfs_fattr_init(calldata
->res
.fattr
);
1299 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1300 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1301 calldata
->arg
.open_flags
= FMODE_READ
;
1302 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1303 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1304 calldata
->arg
.open_flags
= FMODE_WRITE
;
1306 calldata
->timestamp
= jiffies
;
1307 rpc_call_start(task
);
1310 static const struct rpc_call_ops nfs4_close_ops
= {
1311 .rpc_call_prepare
= nfs4_close_prepare
,
1312 .rpc_call_done
= nfs4_close_done
,
1313 .rpc_release
= nfs4_free_closedata
,
1317 * It is possible for data to be read/written from a mem-mapped file
1318 * after the sys_close call (which hits the vfs layer as a flush).
1319 * This means that we can't safely call nfsv4 close on a file until
1320 * the inode is cleared. This in turn means that we are not good
1321 * NFSv4 citizens - we do not indicate to the server to update the file's
1322 * share state even when we are done with one of the three share
1323 * stateid's in the inode.
1325 * NOTE: Caller must be holding the sp->so_owner semaphore!
1327 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1329 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1330 struct nfs4_closedata
*calldata
;
1331 struct nfs4_state_owner
*sp
= state
->owner
;
1332 struct rpc_task
*task
;
1333 struct rpc_message msg
= {
1334 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1335 .rpc_cred
= state
->owner
->so_cred
,
1337 struct rpc_task_setup task_setup_data
= {
1338 .rpc_client
= server
->client
,
1339 .rpc_message
= &msg
,
1340 .callback_ops
= &nfs4_close_ops
,
1341 .workqueue
= nfsiod_workqueue
,
1342 .flags
= RPC_TASK_ASYNC
,
1344 int status
= -ENOMEM
;
1346 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1347 if (calldata
== NULL
)
1349 calldata
->inode
= state
->inode
;
1350 calldata
->state
= state
;
1351 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1352 calldata
->arg
.stateid
= &state
->open_stateid
;
1353 /* Serialization for the sequence id */
1354 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1355 if (calldata
->arg
.seqid
== NULL
)
1356 goto out_free_calldata
;
1357 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1358 calldata
->res
.fattr
= &calldata
->fattr
;
1359 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1360 calldata
->res
.server
= server
;
1361 calldata
->path
.mnt
= mntget(path
->mnt
);
1362 calldata
->path
.dentry
= dget(path
->dentry
);
1364 msg
.rpc_argp
= &calldata
->arg
,
1365 msg
.rpc_resp
= &calldata
->res
,
1366 task_setup_data
.callback_data
= calldata
;
1367 task
= rpc_run_task(&task_setup_data
);
1369 return PTR_ERR(task
);
1372 status
= rpc_wait_for_completion_task(task
);
1378 nfs4_put_open_state(state
);
1379 nfs4_put_state_owner(sp
);
1383 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1388 /* If the open_intent is for execute, we have an extra check to make */
1389 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1390 ret
= nfs_may_open(state
->inode
,
1391 state
->owner
->so_cred
,
1392 nd
->intent
.open
.flags
);
1396 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1397 if (!IS_ERR(filp
)) {
1398 struct nfs_open_context
*ctx
;
1399 ctx
= nfs_file_open_context(filp
);
1403 ret
= PTR_ERR(filp
);
1405 nfs4_close_sync(path
, state
, nd
->intent
.open
.flags
);
1410 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1412 struct path path
= {
1413 .mnt
= nd
->path
.mnt
,
1416 struct dentry
*parent
;
1418 struct rpc_cred
*cred
;
1419 struct nfs4_state
*state
;
1422 if (nd
->flags
& LOOKUP_CREATE
) {
1423 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1424 attr
.ia_valid
= ATTR_MODE
;
1425 if (!IS_POSIXACL(dir
))
1426 attr
.ia_mode
&= ~current
->fs
->umask
;
1429 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1432 cred
= rpc_lookup_cred();
1434 return (struct dentry
*)cred
;
1435 parent
= dentry
->d_parent
;
1436 /* Protect against concurrent sillydeletes */
1437 nfs_block_sillyrename(parent
);
1438 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1440 if (IS_ERR(state
)) {
1441 if (PTR_ERR(state
) == -ENOENT
) {
1442 d_add(dentry
, NULL
);
1443 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1445 nfs_unblock_sillyrename(parent
);
1446 return (struct dentry
*)state
;
1448 res
= d_add_unique(dentry
, igrab(state
->inode
));
1451 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1452 nfs_unblock_sillyrename(parent
);
1453 nfs4_intent_set_file(nd
, &path
, state
);
1458 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1460 struct path path
= {
1461 .mnt
= nd
->path
.mnt
,
1464 struct rpc_cred
*cred
;
1465 struct nfs4_state
*state
;
1467 cred
= rpc_lookup_cred();
1469 return PTR_ERR(cred
);
1470 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1472 if (IS_ERR(state
)) {
1473 switch (PTR_ERR(state
)) {
1479 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1485 if (state
->inode
== dentry
->d_inode
) {
1486 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1487 nfs4_intent_set_file(nd
, &path
, state
);
1490 nfs4_close_sync(&path
, state
, openflags
);
1497 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1499 struct nfs4_server_caps_res res
= {};
1500 struct rpc_message msg
= {
1501 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1502 .rpc_argp
= fhandle
,
1507 status
= rpc_call_sync(server
->client
, &msg
, 0);
1509 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1510 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1511 server
->caps
|= NFS_CAP_ACLS
;
1512 if (res
.has_links
!= 0)
1513 server
->caps
|= NFS_CAP_HARDLINKS
;
1514 if (res
.has_symlinks
!= 0)
1515 server
->caps
|= NFS_CAP_SYMLINKS
;
1516 server
->acl_bitmask
= res
.acl_bitmask
;
1521 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1523 struct nfs4_exception exception
= { };
1526 err
= nfs4_handle_exception(server
,
1527 _nfs4_server_capabilities(server
, fhandle
),
1529 } while (exception
.retry
);
1533 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1534 struct nfs_fsinfo
*info
)
1536 struct nfs4_lookup_root_arg args
= {
1537 .bitmask
= nfs4_fattr_bitmap
,
1539 struct nfs4_lookup_res res
= {
1541 .fattr
= info
->fattr
,
1544 struct rpc_message msg
= {
1545 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1549 nfs_fattr_init(info
->fattr
);
1550 return rpc_call_sync(server
->client
, &msg
, 0);
1553 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1554 struct nfs_fsinfo
*info
)
1556 struct nfs4_exception exception
= { };
1559 err
= nfs4_handle_exception(server
,
1560 _nfs4_lookup_root(server
, fhandle
, info
),
1562 } while (exception
.retry
);
1567 * get the file handle for the "/" directory on the server
1569 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1570 struct nfs_fsinfo
*info
)
1574 status
= nfs4_lookup_root(server
, fhandle
, info
);
1576 status
= nfs4_server_capabilities(server
, fhandle
);
1578 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1579 return nfs4_map_errors(status
);
1583 * Get locations and (maybe) other attributes of a referral.
1584 * Note that we'll actually follow the referral later when
1585 * we detect fsid mismatch in inode revalidation
1587 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1589 int status
= -ENOMEM
;
1590 struct page
*page
= NULL
;
1591 struct nfs4_fs_locations
*locations
= NULL
;
1593 page
= alloc_page(GFP_KERNEL
);
1596 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1597 if (locations
== NULL
)
1600 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1603 /* Make sure server returned a different fsid for the referral */
1604 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1605 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1610 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1611 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1613 fattr
->mode
= S_IFDIR
;
1614 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1623 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1625 struct nfs4_getattr_arg args
= {
1627 .bitmask
= server
->attr_bitmask
,
1629 struct nfs4_getattr_res res
= {
1633 struct rpc_message msg
= {
1634 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1639 nfs_fattr_init(fattr
);
1640 return rpc_call_sync(server
->client
, &msg
, 0);
1643 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1645 struct nfs4_exception exception
= { };
1648 err
= nfs4_handle_exception(server
,
1649 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1651 } while (exception
.retry
);
1656 * The file is not closed if it is opened due to the a request to change
1657 * the size of the file. The open call will not be needed once the
1658 * VFS layer lookup-intents are implemented.
1660 * Close is called when the inode is destroyed.
1661 * If we haven't opened the file for O_WRONLY, we
1662 * need to in the size_change case to obtain a stateid.
1665 * Because OPEN is always done by name in nfsv4, it is
1666 * possible that we opened a different file by the same
1667 * name. We can recognize this race condition, but we
1668 * can't do anything about it besides returning an error.
1670 * This will be fixed with VFS changes (lookup-intent).
1673 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1674 struct iattr
*sattr
)
1676 struct inode
*inode
= dentry
->d_inode
;
1677 struct rpc_cred
*cred
= NULL
;
1678 struct nfs4_state
*state
= NULL
;
1681 nfs_fattr_init(fattr
);
1683 /* Search for an existing open(O_WRITE) file */
1684 if (sattr
->ia_valid
& ATTR_FILE
) {
1685 struct nfs_open_context
*ctx
;
1687 ctx
= nfs_file_open_context(sattr
->ia_file
);
1694 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1696 nfs_setattr_update_inode(inode
, sattr
);
1700 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1701 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1702 struct nfs_fattr
*fattr
)
1705 struct nfs4_lookup_arg args
= {
1706 .bitmask
= server
->attr_bitmask
,
1710 struct nfs4_lookup_res res
= {
1715 struct rpc_message msg
= {
1716 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1721 nfs_fattr_init(fattr
);
1723 dprintk("NFS call lookupfh %s\n", name
->name
);
1724 status
= rpc_call_sync(server
->client
, &msg
, 0);
1725 dprintk("NFS reply lookupfh: %d\n", status
);
1729 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1730 struct qstr
*name
, struct nfs_fh
*fhandle
,
1731 struct nfs_fattr
*fattr
)
1733 struct nfs4_exception exception
= { };
1736 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1738 if (err
== -NFS4ERR_MOVED
) {
1742 err
= nfs4_handle_exception(server
, err
, &exception
);
1743 } while (exception
.retry
);
1747 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1748 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1752 dprintk("NFS call lookup %s\n", name
->name
);
1753 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1754 if (status
== -NFS4ERR_MOVED
)
1755 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1756 dprintk("NFS reply lookup: %d\n", status
);
1760 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1762 struct nfs4_exception exception
= { };
1765 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1766 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1768 } while (exception
.retry
);
1772 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1774 struct nfs_server
*server
= NFS_SERVER(inode
);
1775 struct nfs_fattr fattr
;
1776 struct nfs4_accessargs args
= {
1777 .fh
= NFS_FH(inode
),
1778 .bitmask
= server
->attr_bitmask
,
1780 struct nfs4_accessres res
= {
1784 struct rpc_message msg
= {
1785 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1788 .rpc_cred
= entry
->cred
,
1790 int mode
= entry
->mask
;
1794 * Determine which access bits we want to ask for...
1796 if (mode
& MAY_READ
)
1797 args
.access
|= NFS4_ACCESS_READ
;
1798 if (S_ISDIR(inode
->i_mode
)) {
1799 if (mode
& MAY_WRITE
)
1800 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1801 if (mode
& MAY_EXEC
)
1802 args
.access
|= NFS4_ACCESS_LOOKUP
;
1804 if (mode
& MAY_WRITE
)
1805 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1806 if (mode
& MAY_EXEC
)
1807 args
.access
|= NFS4_ACCESS_EXECUTE
;
1809 nfs_fattr_init(&fattr
);
1810 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1813 if (res
.access
& NFS4_ACCESS_READ
)
1814 entry
->mask
|= MAY_READ
;
1815 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1816 entry
->mask
|= MAY_WRITE
;
1817 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1818 entry
->mask
|= MAY_EXEC
;
1819 nfs_refresh_inode(inode
, &fattr
);
1824 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1826 struct nfs4_exception exception
= { };
1829 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1830 _nfs4_proc_access(inode
, entry
),
1832 } while (exception
.retry
);
1837 * TODO: For the time being, we don't try to get any attributes
1838 * along with any of the zero-copy operations READ, READDIR,
1841 * In the case of the first three, we want to put the GETATTR
1842 * after the read-type operation -- this is because it is hard
1843 * to predict the length of a GETATTR response in v4, and thus
1844 * align the READ data correctly. This means that the GETATTR
1845 * may end up partially falling into the page cache, and we should
1846 * shift it into the 'tail' of the xdr_buf before processing.
1847 * To do this efficiently, we need to know the total length
1848 * of data received, which doesn't seem to be available outside
1851 * In the case of WRITE, we also want to put the GETATTR after
1852 * the operation -- in this case because we want to make sure
1853 * we get the post-operation mtime and size. This means that
1854 * we can't use xdr_encode_pages() as written: we need a variant
1855 * of it which would leave room in the 'tail' iovec.
1857 * Both of these changes to the XDR layer would in fact be quite
1858 * minor, but I decided to leave them for a subsequent patch.
1860 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1861 unsigned int pgbase
, unsigned int pglen
)
1863 struct nfs4_readlink args
= {
1864 .fh
= NFS_FH(inode
),
1869 struct rpc_message msg
= {
1870 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1875 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1878 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1879 unsigned int pgbase
, unsigned int pglen
)
1881 struct nfs4_exception exception
= { };
1884 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1885 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1887 } while (exception
.retry
);
1893 * We will need to arrange for the VFS layer to provide an atomic open.
1894 * Until then, this create/open method is prone to inefficiency and race
1895 * conditions due to the lookup, create, and open VFS calls from sys_open()
1896 * placed on the wire.
1898 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1899 * The file will be opened again in the subsequent VFS open call
1900 * (nfs4_proc_file_open).
1902 * The open for read will just hang around to be used by any process that
1903 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1907 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1908 int flags
, struct nameidata
*nd
)
1910 struct path path
= {
1911 .mnt
= nd
->path
.mnt
,
1914 struct nfs4_state
*state
;
1915 struct rpc_cred
*cred
;
1918 cred
= rpc_lookup_cred();
1920 status
= PTR_ERR(cred
);
1923 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1925 if (IS_ERR(state
)) {
1926 status
= PTR_ERR(state
);
1929 d_add(dentry
, igrab(state
->inode
));
1930 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1931 if (flags
& O_EXCL
) {
1932 struct nfs_fattr fattr
;
1933 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
1935 nfs_setattr_update_inode(state
->inode
, sattr
);
1936 nfs_post_op_update_inode(state
->inode
, &fattr
);
1938 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1939 status
= nfs4_intent_set_file(nd
, &path
, state
);
1941 nfs4_close_sync(&path
, state
, flags
);
1948 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1950 struct nfs_server
*server
= NFS_SERVER(dir
);
1951 struct nfs_removeargs args
= {
1953 .name
.len
= name
->len
,
1954 .name
.name
= name
->name
,
1955 .bitmask
= server
->attr_bitmask
,
1957 struct nfs_removeres res
= {
1960 struct rpc_message msg
= {
1961 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1967 nfs_fattr_init(&res
.dir_attr
);
1968 status
= rpc_call_sync(server
->client
, &msg
, 0);
1970 update_changeattr(dir
, &res
.cinfo
);
1971 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
1976 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1978 struct nfs4_exception exception
= { };
1981 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1982 _nfs4_proc_remove(dir
, name
),
1984 } while (exception
.retry
);
1988 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
1990 struct nfs_server
*server
= NFS_SERVER(dir
);
1991 struct nfs_removeargs
*args
= msg
->rpc_argp
;
1992 struct nfs_removeres
*res
= msg
->rpc_resp
;
1994 args
->bitmask
= server
->attr_bitmask
;
1995 res
->server
= server
;
1996 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1999 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2001 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2003 if (nfs4_async_handle_error(task
, res
->server
) == -EAGAIN
)
2005 update_changeattr(dir
, &res
->cinfo
);
2006 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2010 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2011 struct inode
*new_dir
, struct qstr
*new_name
)
2013 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2014 struct nfs4_rename_arg arg
= {
2015 .old_dir
= NFS_FH(old_dir
),
2016 .new_dir
= NFS_FH(new_dir
),
2017 .old_name
= old_name
,
2018 .new_name
= new_name
,
2019 .bitmask
= server
->attr_bitmask
,
2021 struct nfs_fattr old_fattr
, new_fattr
;
2022 struct nfs4_rename_res res
= {
2024 .old_fattr
= &old_fattr
,
2025 .new_fattr
= &new_fattr
,
2027 struct rpc_message msg
= {
2028 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2034 nfs_fattr_init(res
.old_fattr
);
2035 nfs_fattr_init(res
.new_fattr
);
2036 status
= rpc_call_sync(server
->client
, &msg
, 0);
2039 update_changeattr(old_dir
, &res
.old_cinfo
);
2040 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2041 update_changeattr(new_dir
, &res
.new_cinfo
);
2042 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2047 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2048 struct inode
*new_dir
, struct qstr
*new_name
)
2050 struct nfs4_exception exception
= { };
2053 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2054 _nfs4_proc_rename(old_dir
, old_name
,
2057 } while (exception
.retry
);
2061 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2063 struct nfs_server
*server
= NFS_SERVER(inode
);
2064 struct nfs4_link_arg arg
= {
2065 .fh
= NFS_FH(inode
),
2066 .dir_fh
= NFS_FH(dir
),
2068 .bitmask
= server
->attr_bitmask
,
2070 struct nfs_fattr fattr
, dir_attr
;
2071 struct nfs4_link_res res
= {
2074 .dir_attr
= &dir_attr
,
2076 struct rpc_message msg
= {
2077 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2083 nfs_fattr_init(res
.fattr
);
2084 nfs_fattr_init(res
.dir_attr
);
2085 status
= rpc_call_sync(server
->client
, &msg
, 0);
2087 update_changeattr(dir
, &res
.cinfo
);
2088 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2089 nfs_post_op_update_inode(inode
, res
.fattr
);
2095 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2097 struct nfs4_exception exception
= { };
2100 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2101 _nfs4_proc_link(inode
, dir
, name
),
2103 } while (exception
.retry
);
2107 struct nfs4_createdata
{
2108 struct rpc_message msg
;
2109 struct nfs4_create_arg arg
;
2110 struct nfs4_create_res res
;
2112 struct nfs_fattr fattr
;
2113 struct nfs_fattr dir_fattr
;
2116 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2117 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2119 struct nfs4_createdata
*data
;
2121 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2123 struct nfs_server
*server
= NFS_SERVER(dir
);
2125 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2126 data
->msg
.rpc_argp
= &data
->arg
;
2127 data
->msg
.rpc_resp
= &data
->res
;
2128 data
->arg
.dir_fh
= NFS_FH(dir
);
2129 data
->arg
.server
= server
;
2130 data
->arg
.name
= name
;
2131 data
->arg
.attrs
= sattr
;
2132 data
->arg
.ftype
= ftype
;
2133 data
->arg
.bitmask
= server
->attr_bitmask
;
2134 data
->res
.server
= server
;
2135 data
->res
.fh
= &data
->fh
;
2136 data
->res
.fattr
= &data
->fattr
;
2137 data
->res
.dir_fattr
= &data
->dir_fattr
;
2138 nfs_fattr_init(data
->res
.fattr
);
2139 nfs_fattr_init(data
->res
.dir_fattr
);
2144 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2146 int status
= rpc_call_sync(NFS_CLIENT(dir
), &data
->msg
, 0);
2148 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2149 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2150 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2155 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2160 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2161 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2163 struct nfs4_createdata
*data
;
2164 int status
= -ENAMETOOLONG
;
2166 if (len
> NFS4_MAXPATHLEN
)
2170 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2174 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2175 data
->arg
.u
.symlink
.pages
= &page
;
2176 data
->arg
.u
.symlink
.len
= len
;
2178 status
= nfs4_do_create(dir
, dentry
, data
);
2180 nfs4_free_createdata(data
);
2185 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2186 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2188 struct nfs4_exception exception
= { };
2191 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2192 _nfs4_proc_symlink(dir
, dentry
, page
,
2195 } while (exception
.retry
);
2199 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2200 struct iattr
*sattr
)
2202 struct nfs4_createdata
*data
;
2203 int status
= -ENOMEM
;
2205 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2209 status
= nfs4_do_create(dir
, dentry
, data
);
2211 nfs4_free_createdata(data
);
2216 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2217 struct iattr
*sattr
)
2219 struct nfs4_exception exception
= { };
2222 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2223 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2225 } while (exception
.retry
);
2229 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2230 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2232 struct inode
*dir
= dentry
->d_inode
;
2233 struct nfs4_readdir_arg args
= {
2238 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2240 struct nfs4_readdir_res res
;
2241 struct rpc_message msg
= {
2242 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2249 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2250 dentry
->d_parent
->d_name
.name
,
2251 dentry
->d_name
.name
,
2252 (unsigned long long)cookie
);
2253 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2254 res
.pgbase
= args
.pgbase
;
2255 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2257 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2259 nfs_invalidate_atime(dir
);
2261 dprintk("%s: returns %d\n", __func__
, status
);
2265 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2266 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2268 struct nfs4_exception exception
= { };
2271 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2272 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2275 } while (exception
.retry
);
2279 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2280 struct iattr
*sattr
, dev_t rdev
)
2282 struct nfs4_createdata
*data
;
2283 int mode
= sattr
->ia_mode
;
2284 int status
= -ENOMEM
;
2286 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2287 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2289 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2294 data
->arg
.ftype
= NF4FIFO
;
2295 else if (S_ISBLK(mode
)) {
2296 data
->arg
.ftype
= NF4BLK
;
2297 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2298 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2300 else if (S_ISCHR(mode
)) {
2301 data
->arg
.ftype
= NF4CHR
;
2302 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2303 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2306 status
= nfs4_do_create(dir
, dentry
, data
);
2308 nfs4_free_createdata(data
);
2313 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2314 struct iattr
*sattr
, dev_t rdev
)
2316 struct nfs4_exception exception
= { };
2319 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2320 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2322 } while (exception
.retry
);
2326 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2327 struct nfs_fsstat
*fsstat
)
2329 struct nfs4_statfs_arg args
= {
2331 .bitmask
= server
->attr_bitmask
,
2333 struct rpc_message msg
= {
2334 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2339 nfs_fattr_init(fsstat
->fattr
);
2340 return rpc_call_sync(server
->client
, &msg
, 0);
2343 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2345 struct nfs4_exception exception
= { };
2348 err
= nfs4_handle_exception(server
,
2349 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2351 } while (exception
.retry
);
2355 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2356 struct nfs_fsinfo
*fsinfo
)
2358 struct nfs4_fsinfo_arg args
= {
2360 .bitmask
= server
->attr_bitmask
,
2362 struct rpc_message msg
= {
2363 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2368 return rpc_call_sync(server
->client
, &msg
, 0);
2371 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2373 struct nfs4_exception exception
= { };
2377 err
= nfs4_handle_exception(server
,
2378 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2380 } while (exception
.retry
);
2384 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2386 nfs_fattr_init(fsinfo
->fattr
);
2387 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2390 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2391 struct nfs_pathconf
*pathconf
)
2393 struct nfs4_pathconf_arg args
= {
2395 .bitmask
= server
->attr_bitmask
,
2397 struct rpc_message msg
= {
2398 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2400 .rpc_resp
= pathconf
,
2403 /* None of the pathconf attributes are mandatory to implement */
2404 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2405 memset(pathconf
, 0, sizeof(*pathconf
));
2409 nfs_fattr_init(pathconf
->fattr
);
2410 return rpc_call_sync(server
->client
, &msg
, 0);
2413 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2414 struct nfs_pathconf
*pathconf
)
2416 struct nfs4_exception exception
= { };
2420 err
= nfs4_handle_exception(server
,
2421 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2423 } while (exception
.retry
);
2427 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2429 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2431 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2432 rpc_restart_call(task
);
2436 nfs_invalidate_atime(data
->inode
);
2437 if (task
->tk_status
> 0)
2438 renew_lease(server
, data
->timestamp
);
2442 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2444 data
->timestamp
= jiffies
;
2445 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2448 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2450 struct inode
*inode
= data
->inode
;
2452 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2453 rpc_restart_call(task
);
2456 if (task
->tk_status
>= 0) {
2457 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2458 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2463 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2465 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2467 data
->args
.bitmask
= server
->attr_bitmask
;
2468 data
->res
.server
= server
;
2469 data
->timestamp
= jiffies
;
2471 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2474 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2476 struct inode
*inode
= data
->inode
;
2478 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2479 rpc_restart_call(task
);
2482 nfs_refresh_inode(inode
, data
->res
.fattr
);
2486 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2488 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2490 data
->args
.bitmask
= server
->attr_bitmask
;
2491 data
->res
.server
= server
;
2492 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2496 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2497 * standalone procedure for queueing an asynchronous RENEW.
2499 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2501 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2502 unsigned long timestamp
= (unsigned long)data
;
2504 if (task
->tk_status
< 0) {
2505 switch (task
->tk_status
) {
2506 case -NFS4ERR_STALE_CLIENTID
:
2507 case -NFS4ERR_EXPIRED
:
2508 case -NFS4ERR_CB_PATH_DOWN
:
2509 nfs4_schedule_state_recovery(clp
);
2513 spin_lock(&clp
->cl_lock
);
2514 if (time_before(clp
->cl_last_renewal
,timestamp
))
2515 clp
->cl_last_renewal
= timestamp
;
2516 spin_unlock(&clp
->cl_lock
);
2519 static const struct rpc_call_ops nfs4_renew_ops
= {
2520 .rpc_call_done
= nfs4_renew_done
,
2523 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2525 struct rpc_message msg
= {
2526 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2531 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2532 &nfs4_renew_ops
, (void *)jiffies
);
2535 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2537 struct rpc_message msg
= {
2538 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2542 unsigned long now
= jiffies
;
2545 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2548 spin_lock(&clp
->cl_lock
);
2549 if (time_before(clp
->cl_last_renewal
,now
))
2550 clp
->cl_last_renewal
= now
;
2551 spin_unlock(&clp
->cl_lock
);
2555 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2557 return (server
->caps
& NFS_CAP_ACLS
)
2558 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2559 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2562 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2563 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2566 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2568 static void buf_to_pages(const void *buf
, size_t buflen
,
2569 struct page
**pages
, unsigned int *pgbase
)
2571 const void *p
= buf
;
2573 *pgbase
= offset_in_page(buf
);
2575 while (p
< buf
+ buflen
) {
2576 *(pages
++) = virt_to_page(p
);
2577 p
+= PAGE_CACHE_SIZE
;
2581 struct nfs4_cached_acl
{
2587 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2589 struct nfs_inode
*nfsi
= NFS_I(inode
);
2591 spin_lock(&inode
->i_lock
);
2592 kfree(nfsi
->nfs4_acl
);
2593 nfsi
->nfs4_acl
= acl
;
2594 spin_unlock(&inode
->i_lock
);
2597 static void nfs4_zap_acl_attr(struct inode
*inode
)
2599 nfs4_set_cached_acl(inode
, NULL
);
2602 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2604 struct nfs_inode
*nfsi
= NFS_I(inode
);
2605 struct nfs4_cached_acl
*acl
;
2608 spin_lock(&inode
->i_lock
);
2609 acl
= nfsi
->nfs4_acl
;
2612 if (buf
== NULL
) /* user is just asking for length */
2614 if (acl
->cached
== 0)
2616 ret
= -ERANGE
; /* see getxattr(2) man page */
2617 if (acl
->len
> buflen
)
2619 memcpy(buf
, acl
->data
, acl
->len
);
2623 spin_unlock(&inode
->i_lock
);
2627 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2629 struct nfs4_cached_acl
*acl
;
2631 if (buf
&& acl_len
<= PAGE_SIZE
) {
2632 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2636 memcpy(acl
->data
, buf
, acl_len
);
2638 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2645 nfs4_set_cached_acl(inode
, acl
);
2648 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2650 struct page
*pages
[NFS4ACL_MAXPAGES
];
2651 struct nfs_getaclargs args
= {
2652 .fh
= NFS_FH(inode
),
2656 size_t resp_len
= buflen
;
2658 struct rpc_message msg
= {
2659 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2661 .rpc_resp
= &resp_len
,
2663 struct page
*localpage
= NULL
;
2666 if (buflen
< PAGE_SIZE
) {
2667 /* As long as we're doing a round trip to the server anyway,
2668 * let's be prepared for a page of acl data. */
2669 localpage
= alloc_page(GFP_KERNEL
);
2670 resp_buf
= page_address(localpage
);
2671 if (localpage
== NULL
)
2673 args
.acl_pages
[0] = localpage
;
2674 args
.acl_pgbase
= 0;
2675 resp_len
= args
.acl_len
= PAGE_SIZE
;
2678 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2680 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2683 if (resp_len
> args
.acl_len
)
2684 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2686 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2689 if (resp_len
> buflen
)
2692 memcpy(buf
, resp_buf
, resp_len
);
2697 __free_page(localpage
);
2701 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2703 struct nfs4_exception exception
= { };
2706 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2709 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2710 } while (exception
.retry
);
2714 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2716 struct nfs_server
*server
= NFS_SERVER(inode
);
2719 if (!nfs4_server_supports_acls(server
))
2721 ret
= nfs_revalidate_inode(server
, inode
);
2724 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2725 nfs_zap_acl_cache(inode
);
2726 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2729 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2732 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2734 struct nfs_server
*server
= NFS_SERVER(inode
);
2735 struct page
*pages
[NFS4ACL_MAXPAGES
];
2736 struct nfs_setaclargs arg
= {
2737 .fh
= NFS_FH(inode
),
2741 struct rpc_message msg
= {
2742 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2748 if (!nfs4_server_supports_acls(server
))
2750 nfs_inode_return_delegation(inode
);
2751 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2752 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2753 nfs_access_zap_cache(inode
);
2754 nfs_zap_acl_cache(inode
);
2758 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2760 struct nfs4_exception exception
= { };
2763 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2764 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2766 } while (exception
.retry
);
2771 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2773 struct nfs_client
*clp
= server
->nfs_client
;
2775 if (!clp
|| task
->tk_status
>= 0)
2777 switch(task
->tk_status
) {
2778 case -NFS4ERR_STALE_CLIENTID
:
2779 case -NFS4ERR_STALE_STATEID
:
2780 case -NFS4ERR_EXPIRED
:
2781 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2782 nfs4_schedule_state_recovery(clp
);
2783 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2784 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2785 task
->tk_status
= 0;
2787 case -NFS4ERR_DELAY
:
2788 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2789 case -NFS4ERR_GRACE
:
2790 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2791 task
->tk_status
= 0;
2793 case -NFS4ERR_OLD_STATEID
:
2794 task
->tk_status
= 0;
2797 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2801 static int nfs4_wait_bit_killable(void *word
)
2803 if (fatal_signal_pending(current
))
2804 return -ERESTARTSYS
;
2809 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2815 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2817 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2818 nfs4_wait_bit_killable
, TASK_KILLABLE
);
2820 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2824 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2831 *timeout
= NFS4_POLL_RETRY_MIN
;
2832 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2833 *timeout
= NFS4_POLL_RETRY_MAX
;
2834 schedule_timeout_killable(*timeout
);
2835 if (fatal_signal_pending(current
))
2841 /* This is the error handling routine for processes that are allowed
2844 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2846 struct nfs_client
*clp
= server
->nfs_client
;
2847 int ret
= errorcode
;
2849 exception
->retry
= 0;
2853 case -NFS4ERR_STALE_CLIENTID
:
2854 case -NFS4ERR_STALE_STATEID
:
2855 case -NFS4ERR_EXPIRED
:
2856 nfs4_schedule_state_recovery(clp
);
2857 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2859 exception
->retry
= 1;
2861 case -NFS4ERR_FILE_OPEN
:
2862 case -NFS4ERR_GRACE
:
2863 case -NFS4ERR_DELAY
:
2864 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2867 case -NFS4ERR_OLD_STATEID
:
2868 exception
->retry
= 1;
2870 /* We failed to handle the error */
2871 return nfs4_map_errors(ret
);
2874 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2876 nfs4_verifier sc_verifier
;
2877 struct nfs4_setclientid setclientid
= {
2878 .sc_verifier
= &sc_verifier
,
2881 struct rpc_message msg
= {
2882 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2883 .rpc_argp
= &setclientid
,
2891 p
= (__be32
*)sc_verifier
.data
;
2892 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2893 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2896 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2897 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2899 rpc_peeraddr2str(clp
->cl_rpcclient
,
2901 rpc_peeraddr2str(clp
->cl_rpcclient
,
2903 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2904 clp
->cl_id_uniquifier
);
2905 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2906 sizeof(setclientid
.sc_netid
),
2907 rpc_peeraddr2str(clp
->cl_rpcclient
,
2908 RPC_DISPLAY_NETID
));
2909 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2910 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2911 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2913 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2914 if (status
!= -NFS4ERR_CLID_INUSE
)
2919 ssleep(clp
->cl_lease_time
+ 1);
2921 if (++clp
->cl_id_uniquifier
== 0)
2927 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2929 struct nfs_fsinfo fsinfo
;
2930 struct rpc_message msg
= {
2931 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2933 .rpc_resp
= &fsinfo
,
2940 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2942 spin_lock(&clp
->cl_lock
);
2943 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2944 clp
->cl_last_renewal
= now
;
2945 spin_unlock(&clp
->cl_lock
);
2950 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2955 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2959 case -NFS4ERR_RESOURCE
:
2960 /* The IBM lawyers misread another document! */
2961 case -NFS4ERR_DELAY
:
2962 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2968 struct nfs4_delegreturndata
{
2969 struct nfs4_delegreturnargs args
;
2970 struct nfs4_delegreturnres res
;
2972 nfs4_stateid stateid
;
2973 unsigned long timestamp
;
2974 struct nfs_fattr fattr
;
2978 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
2980 struct nfs4_delegreturndata
*data
= calldata
;
2981 data
->rpc_status
= task
->tk_status
;
2982 if (data
->rpc_status
== 0)
2983 renew_lease(data
->res
.server
, data
->timestamp
);
2986 static void nfs4_delegreturn_release(void *calldata
)
2991 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
2992 .rpc_call_done
= nfs4_delegreturn_done
,
2993 .rpc_release
= nfs4_delegreturn_release
,
2996 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
2998 struct nfs4_delegreturndata
*data
;
2999 struct nfs_server
*server
= NFS_SERVER(inode
);
3000 struct rpc_task
*task
;
3001 struct rpc_message msg
= {
3002 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3005 struct rpc_task_setup task_setup_data
= {
3006 .rpc_client
= server
->client
,
3007 .rpc_message
= &msg
,
3008 .callback_ops
= &nfs4_delegreturn_ops
,
3009 .flags
= RPC_TASK_ASYNC
,
3013 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3016 data
->args
.fhandle
= &data
->fh
;
3017 data
->args
.stateid
= &data
->stateid
;
3018 data
->args
.bitmask
= server
->attr_bitmask
;
3019 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3020 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3021 data
->res
.fattr
= &data
->fattr
;
3022 data
->res
.server
= server
;
3023 nfs_fattr_init(data
->res
.fattr
);
3024 data
->timestamp
= jiffies
;
3025 data
->rpc_status
= 0;
3027 task_setup_data
.callback_data
= data
;
3028 msg
.rpc_argp
= &data
->args
,
3029 msg
.rpc_resp
= &data
->res
,
3030 task
= rpc_run_task(&task_setup_data
);
3032 return PTR_ERR(task
);
3035 status
= nfs4_wait_for_completion_rpc_task(task
);
3038 status
= data
->rpc_status
;
3041 nfs_refresh_inode(inode
, &data
->fattr
);
3047 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3049 struct nfs_server
*server
= NFS_SERVER(inode
);
3050 struct nfs4_exception exception
= { };
3053 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3055 case -NFS4ERR_STALE_STATEID
:
3056 case -NFS4ERR_EXPIRED
:
3060 err
= nfs4_handle_exception(server
, err
, &exception
);
3061 } while (exception
.retry
);
3065 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3066 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3069 * sleep, with exponential backoff, and retry the LOCK operation.
3071 static unsigned long
3072 nfs4_set_lock_task_retry(unsigned long timeout
)
3074 schedule_timeout_killable(timeout
);
3076 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3077 return NFS4_LOCK_MAXTIMEOUT
;
3081 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3083 struct inode
*inode
= state
->inode
;
3084 struct nfs_server
*server
= NFS_SERVER(inode
);
3085 struct nfs_client
*clp
= server
->nfs_client
;
3086 struct nfs_lockt_args arg
= {
3087 .fh
= NFS_FH(inode
),
3090 struct nfs_lockt_res res
= {
3093 struct rpc_message msg
= {
3094 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3097 .rpc_cred
= state
->owner
->so_cred
,
3099 struct nfs4_lock_state
*lsp
;
3102 down_read(&clp
->cl_sem
);
3103 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3104 status
= nfs4_set_lock_state(state
, request
);
3107 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3108 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3109 status
= rpc_call_sync(server
->client
, &msg
, 0);
3112 request
->fl_type
= F_UNLCK
;
3114 case -NFS4ERR_DENIED
:
3117 request
->fl_ops
->fl_release_private(request
);
3119 up_read(&clp
->cl_sem
);
3123 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3125 struct nfs4_exception exception
= { };
3129 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3130 _nfs4_proc_getlk(state
, cmd
, request
),
3132 } while (exception
.retry
);
3136 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3139 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3141 res
= posix_lock_file_wait(file
, fl
);
3144 res
= flock_lock_file_wait(file
, fl
);
3152 struct nfs4_unlockdata
{
3153 struct nfs_locku_args arg
;
3154 struct nfs_locku_res res
;
3155 struct nfs4_lock_state
*lsp
;
3156 struct nfs_open_context
*ctx
;
3157 struct file_lock fl
;
3158 const struct nfs_server
*server
;
3159 unsigned long timestamp
;
3162 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3163 struct nfs_open_context
*ctx
,
3164 struct nfs4_lock_state
*lsp
,
3165 struct nfs_seqid
*seqid
)
3167 struct nfs4_unlockdata
*p
;
3168 struct inode
*inode
= lsp
->ls_state
->inode
;
3170 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3173 p
->arg
.fh
= NFS_FH(inode
);
3175 p
->arg
.seqid
= seqid
;
3176 p
->res
.seqid
= seqid
;
3177 p
->arg
.stateid
= &lsp
->ls_stateid
;
3179 atomic_inc(&lsp
->ls_count
);
3180 /* Ensure we don't close file until we're done freeing locks! */
3181 p
->ctx
= get_nfs_open_context(ctx
);
3182 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3183 p
->server
= NFS_SERVER(inode
);
3187 static void nfs4_locku_release_calldata(void *data
)
3189 struct nfs4_unlockdata
*calldata
= data
;
3190 nfs_free_seqid(calldata
->arg
.seqid
);
3191 nfs4_put_lock_state(calldata
->lsp
);
3192 put_nfs_open_context(calldata
->ctx
);
3196 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3198 struct nfs4_unlockdata
*calldata
= data
;
3200 if (RPC_ASSASSINATED(task
))
3202 switch (task
->tk_status
) {
3204 memcpy(calldata
->lsp
->ls_stateid
.data
,
3205 calldata
->res
.stateid
.data
,
3206 sizeof(calldata
->lsp
->ls_stateid
.data
));
3207 renew_lease(calldata
->server
, calldata
->timestamp
);
3209 case -NFS4ERR_STALE_STATEID
:
3210 case -NFS4ERR_EXPIRED
:
3213 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3214 rpc_restart_call(task
);
3218 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3220 struct nfs4_unlockdata
*calldata
= data
;
3222 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3224 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3225 /* Note: exit _without_ running nfs4_locku_done */
3226 task
->tk_action
= NULL
;
3229 calldata
->timestamp
= jiffies
;
3230 rpc_call_start(task
);
3233 static const struct rpc_call_ops nfs4_locku_ops
= {
3234 .rpc_call_prepare
= nfs4_locku_prepare
,
3235 .rpc_call_done
= nfs4_locku_done
,
3236 .rpc_release
= nfs4_locku_release_calldata
,
3239 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3240 struct nfs_open_context
*ctx
,
3241 struct nfs4_lock_state
*lsp
,
3242 struct nfs_seqid
*seqid
)
3244 struct nfs4_unlockdata
*data
;
3245 struct rpc_message msg
= {
3246 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3247 .rpc_cred
= ctx
->cred
,
3249 struct rpc_task_setup task_setup_data
= {
3250 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3251 .rpc_message
= &msg
,
3252 .callback_ops
= &nfs4_locku_ops
,
3253 .workqueue
= nfsiod_workqueue
,
3254 .flags
= RPC_TASK_ASYNC
,
3257 /* Ensure this is an unlock - when canceling a lock, the
3258 * canceled lock is passed in, and it won't be an unlock.
3260 fl
->fl_type
= F_UNLCK
;
3262 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3264 nfs_free_seqid(seqid
);
3265 return ERR_PTR(-ENOMEM
);
3268 msg
.rpc_argp
= &data
->arg
,
3269 msg
.rpc_resp
= &data
->res
,
3270 task_setup_data
.callback_data
= data
;
3271 return rpc_run_task(&task_setup_data
);
3274 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3276 struct nfs_seqid
*seqid
;
3277 struct nfs4_lock_state
*lsp
;
3278 struct rpc_task
*task
;
3280 unsigned char fl_flags
= request
->fl_flags
;
3282 status
= nfs4_set_lock_state(state
, request
);
3283 /* Unlock _before_ we do the RPC call */
3284 request
->fl_flags
|= FL_EXISTS
;
3285 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3289 /* Is this a delegated lock? */
3290 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3292 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3293 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3297 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3298 status
= PTR_ERR(task
);
3301 status
= nfs4_wait_for_completion_rpc_task(task
);
3304 request
->fl_flags
= fl_flags
;
3308 struct nfs4_lockdata
{
3309 struct nfs_lock_args arg
;
3310 struct nfs_lock_res res
;
3311 struct nfs4_lock_state
*lsp
;
3312 struct nfs_open_context
*ctx
;
3313 struct file_lock fl
;
3314 unsigned long timestamp
;
3319 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3320 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3322 struct nfs4_lockdata
*p
;
3323 struct inode
*inode
= lsp
->ls_state
->inode
;
3324 struct nfs_server
*server
= NFS_SERVER(inode
);
3326 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3330 p
->arg
.fh
= NFS_FH(inode
);
3332 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3333 if (p
->arg
.open_seqid
== NULL
)
3335 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3336 if (p
->arg
.lock_seqid
== NULL
)
3337 goto out_free_seqid
;
3338 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3339 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3340 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3341 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3343 atomic_inc(&lsp
->ls_count
);
3344 p
->ctx
= get_nfs_open_context(ctx
);
3345 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3348 nfs_free_seqid(p
->arg
.open_seqid
);
3354 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3356 struct nfs4_lockdata
*data
= calldata
;
3357 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3359 dprintk("%s: begin!\n", __func__
);
3360 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3362 /* Do we need to do an open_to_lock_owner? */
3363 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3364 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3366 data
->arg
.open_stateid
= &state
->stateid
;
3367 data
->arg
.new_lock_owner
= 1;
3368 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3370 data
->arg
.new_lock_owner
= 0;
3371 data
->timestamp
= jiffies
;
3372 rpc_call_start(task
);
3373 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3376 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3378 struct nfs4_lockdata
*data
= calldata
;
3380 dprintk("%s: begin!\n", __func__
);
3382 data
->rpc_status
= task
->tk_status
;
3383 if (RPC_ASSASSINATED(task
))
3385 if (data
->arg
.new_lock_owner
!= 0) {
3386 if (data
->rpc_status
== 0)
3387 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3391 if (data
->rpc_status
== 0) {
3392 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3393 sizeof(data
->lsp
->ls_stateid
.data
));
3394 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3395 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3398 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3401 static void nfs4_lock_release(void *calldata
)
3403 struct nfs4_lockdata
*data
= calldata
;
3405 dprintk("%s: begin!\n", __func__
);
3406 nfs_free_seqid(data
->arg
.open_seqid
);
3407 if (data
->cancelled
!= 0) {
3408 struct rpc_task
*task
;
3409 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3410 data
->arg
.lock_seqid
);
3413 dprintk("%s: cancelling lock!\n", __func__
);
3415 nfs_free_seqid(data
->arg
.lock_seqid
);
3416 nfs4_put_lock_state(data
->lsp
);
3417 put_nfs_open_context(data
->ctx
);
3419 dprintk("%s: done!\n", __func__
);
3422 static const struct rpc_call_ops nfs4_lock_ops
= {
3423 .rpc_call_prepare
= nfs4_lock_prepare
,
3424 .rpc_call_done
= nfs4_lock_done
,
3425 .rpc_release
= nfs4_lock_release
,
3428 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3430 struct nfs4_lockdata
*data
;
3431 struct rpc_task
*task
;
3432 struct rpc_message msg
= {
3433 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3434 .rpc_cred
= state
->owner
->so_cred
,
3436 struct rpc_task_setup task_setup_data
= {
3437 .rpc_client
= NFS_CLIENT(state
->inode
),
3438 .rpc_message
= &msg
,
3439 .callback_ops
= &nfs4_lock_ops
,
3440 .workqueue
= nfsiod_workqueue
,
3441 .flags
= RPC_TASK_ASYNC
,
3445 dprintk("%s: begin!\n", __func__
);
3446 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3447 fl
->fl_u
.nfs4_fl
.owner
);
3451 data
->arg
.block
= 1;
3453 data
->arg
.reclaim
= 1;
3454 msg
.rpc_argp
= &data
->arg
,
3455 msg
.rpc_resp
= &data
->res
,
3456 task_setup_data
.callback_data
= data
;
3457 task
= rpc_run_task(&task_setup_data
);
3459 return PTR_ERR(task
);
3460 ret
= nfs4_wait_for_completion_rpc_task(task
);
3462 ret
= data
->rpc_status
;
3463 if (ret
== -NFS4ERR_DENIED
)
3466 data
->cancelled
= 1;
3468 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3472 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3474 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3475 struct nfs4_exception exception
= { };
3479 /* Cache the lock if possible... */
3480 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3482 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3483 if (err
!= -NFS4ERR_DELAY
)
3485 nfs4_handle_exception(server
, err
, &exception
);
3486 } while (exception
.retry
);
3490 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3492 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3493 struct nfs4_exception exception
= { };
3496 err
= nfs4_set_lock_state(state
, request
);
3500 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3502 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3503 if (err
!= -NFS4ERR_DELAY
)
3505 nfs4_handle_exception(server
, err
, &exception
);
3506 } while (exception
.retry
);
3510 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3512 struct nfs_client
*clp
= state
->owner
->so_client
;
3513 unsigned char fl_flags
= request
->fl_flags
;
3516 /* Is this a delegated open? */
3517 status
= nfs4_set_lock_state(state
, request
);
3520 request
->fl_flags
|= FL_ACCESS
;
3521 status
= do_vfs_lock(request
->fl_file
, request
);
3524 down_read(&clp
->cl_sem
);
3525 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3526 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3527 /* Yes: cache locks! */
3528 down_read(&nfsi
->rwsem
);
3529 /* ...but avoid races with delegation recall... */
3530 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3531 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3532 status
= do_vfs_lock(request
->fl_file
, request
);
3533 up_read(&nfsi
->rwsem
);
3536 up_read(&nfsi
->rwsem
);
3538 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3541 /* Note: we always want to sleep here! */
3542 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3543 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3544 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3546 up_read(&clp
->cl_sem
);
3548 request
->fl_flags
= fl_flags
;
3552 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3554 struct nfs4_exception exception
= { };
3558 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3559 _nfs4_proc_setlk(state
, cmd
, request
),
3561 } while (exception
.retry
);
3566 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3568 struct nfs_open_context
*ctx
;
3569 struct nfs4_state
*state
;
3570 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3573 /* verify open state */
3574 ctx
= nfs_file_open_context(filp
);
3577 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3581 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3583 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3586 if (request
->fl_type
== F_UNLCK
)
3587 return nfs4_proc_unlck(state
, cmd
, request
);
3590 status
= nfs4_proc_setlk(state
, cmd
, request
);
3591 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3593 timeout
= nfs4_set_lock_task_retry(timeout
);
3594 status
= -ERESTARTSYS
;
3597 } while(status
< 0);
3601 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3603 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3604 struct nfs4_exception exception
= { };
3607 err
= nfs4_set_lock_state(state
, fl
);
3611 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3612 if (err
!= -NFS4ERR_DELAY
)
3614 err
= nfs4_handle_exception(server
, err
, &exception
);
3615 } while (exception
.retry
);
3620 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3622 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3623 size_t buflen
, int flags
)
3625 struct inode
*inode
= dentry
->d_inode
;
3627 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3630 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3633 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3634 * and that's what we'll do for e.g. user attributes that haven't been set.
3635 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3636 * attributes in kernel-managed attribute namespaces. */
3637 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3640 struct inode
*inode
= dentry
->d_inode
;
3642 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3645 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3648 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3650 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3652 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3654 if (buf
&& buflen
< len
)
3657 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3661 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3662 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3664 struct nfs_server
*server
= NFS_SERVER(dir
);
3666 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3667 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3669 struct nfs4_fs_locations_arg args
= {
3670 .dir_fh
= NFS_FH(dir
),
3675 struct rpc_message msg
= {
3676 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3678 .rpc_resp
= fs_locations
,
3682 dprintk("%s: start\n", __func__
);
3683 nfs_fattr_init(&fs_locations
->fattr
);
3684 fs_locations
->server
= server
;
3685 fs_locations
->nlocations
= 0;
3686 status
= rpc_call_sync(server
->client
, &msg
, 0);
3687 dprintk("%s: returned status = %d\n", __func__
, status
);
3691 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3692 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3693 .recover_open
= nfs4_open_reclaim
,
3694 .recover_lock
= nfs4_lock_reclaim
,
3697 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3698 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3699 .recover_open
= nfs4_open_expired
,
3700 .recover_lock
= nfs4_lock_expired
,
3703 static const struct inode_operations nfs4_file_inode_operations
= {
3704 .permission
= nfs_permission
,
3705 .getattr
= nfs_getattr
,
3706 .setattr
= nfs_setattr
,
3707 .getxattr
= nfs4_getxattr
,
3708 .setxattr
= nfs4_setxattr
,
3709 .listxattr
= nfs4_listxattr
,
3712 const struct nfs_rpc_ops nfs_v4_clientops
= {
3713 .version
= 4, /* protocol version */
3714 .dentry_ops
= &nfs4_dentry_operations
,
3715 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3716 .file_inode_ops
= &nfs4_file_inode_operations
,
3717 .getroot
= nfs4_proc_get_root
,
3718 .getattr
= nfs4_proc_getattr
,
3719 .setattr
= nfs4_proc_setattr
,
3720 .lookupfh
= nfs4_proc_lookupfh
,
3721 .lookup
= nfs4_proc_lookup
,
3722 .access
= nfs4_proc_access
,
3723 .readlink
= nfs4_proc_readlink
,
3724 .create
= nfs4_proc_create
,
3725 .remove
= nfs4_proc_remove
,
3726 .unlink_setup
= nfs4_proc_unlink_setup
,
3727 .unlink_done
= nfs4_proc_unlink_done
,
3728 .rename
= nfs4_proc_rename
,
3729 .link
= nfs4_proc_link
,
3730 .symlink
= nfs4_proc_symlink
,
3731 .mkdir
= nfs4_proc_mkdir
,
3732 .rmdir
= nfs4_proc_remove
,
3733 .readdir
= nfs4_proc_readdir
,
3734 .mknod
= nfs4_proc_mknod
,
3735 .statfs
= nfs4_proc_statfs
,
3736 .fsinfo
= nfs4_proc_fsinfo
,
3737 .pathconf
= nfs4_proc_pathconf
,
3738 .set_capabilities
= nfs4_server_capabilities
,
3739 .decode_dirent
= nfs4_decode_dirent
,
3740 .read_setup
= nfs4_proc_read_setup
,
3741 .read_done
= nfs4_read_done
,
3742 .write_setup
= nfs4_proc_write_setup
,
3743 .write_done
= nfs4_write_done
,
3744 .commit_setup
= nfs4_proc_commit_setup
,
3745 .commit_done
= nfs4_commit_done
,
3746 .lock
= nfs4_proc_lock
,
3747 .clear_acl_cache
= nfs4_zap_acl_attr
,