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"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
63 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
64 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*);
65 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
);
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_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
);
69 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
70 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
72 /* Prevent leaks of NFSv4 errors into userland */
73 int nfs4_map_errors(int err
)
76 dprintk("%s could not handle NFSv4 error %d\n",
84 * This is our standard bitmap for GETATTR requests.
86 const u32 nfs4_fattr_bitmap
[2] = {
91 | FATTR4_WORD0_FILEID
,
93 | FATTR4_WORD1_NUMLINKS
95 | FATTR4_WORD1_OWNER_GROUP
97 | FATTR4_WORD1_SPACE_USED
98 | FATTR4_WORD1_TIME_ACCESS
99 | FATTR4_WORD1_TIME_METADATA
100 | FATTR4_WORD1_TIME_MODIFY
103 const u32 nfs4_statfs_bitmap
[2] = {
104 FATTR4_WORD0_FILES_AVAIL
105 | FATTR4_WORD0_FILES_FREE
106 | FATTR4_WORD0_FILES_TOTAL
,
107 FATTR4_WORD1_SPACE_AVAIL
108 | FATTR4_WORD1_SPACE_FREE
109 | FATTR4_WORD1_SPACE_TOTAL
112 const u32 nfs4_pathconf_bitmap
[2] = {
114 | FATTR4_WORD0_MAXNAME
,
118 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
119 | FATTR4_WORD0_MAXREAD
120 | FATTR4_WORD0_MAXWRITE
121 | FATTR4_WORD0_LEASE_TIME
,
125 const u32 nfs4_fs_locations_bitmap
[2] = {
127 | FATTR4_WORD0_CHANGE
130 | FATTR4_WORD0_FILEID
131 | FATTR4_WORD0_FS_LOCATIONS
,
133 | FATTR4_WORD1_NUMLINKS
135 | FATTR4_WORD1_OWNER_GROUP
136 | FATTR4_WORD1_RAWDEV
137 | FATTR4_WORD1_SPACE_USED
138 | FATTR4_WORD1_TIME_ACCESS
139 | FATTR4_WORD1_TIME_METADATA
140 | FATTR4_WORD1_TIME_MODIFY
141 | FATTR4_WORD1_MOUNTED_ON_FILEID
144 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
145 struct nfs4_readdir_arg
*readdir
)
149 BUG_ON(readdir
->count
< 80);
151 readdir
->cookie
= cookie
;
152 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
157 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
162 * NFSv4 servers do not return entries for '.' and '..'
163 * Therefore, we fake these entries here. We let '.'
164 * have cookie 0 and '..' have cookie 1. Note that
165 * when talking to the server, we always send cookie 0
168 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
171 *p
++ = xdr_one
; /* next */
172 *p
++ = xdr_zero
; /* cookie, first word */
173 *p
++ = xdr_one
; /* cookie, second word */
174 *p
++ = xdr_one
; /* entry len */
175 memcpy(p
, ".\0\0\0", 4); /* entry */
177 *p
++ = xdr_one
; /* bitmap length */
178 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
179 *p
++ = htonl(8); /* attribute buffer length */
180 p
= xdr_encode_hyper(p
, dentry
->d_inode
->i_ino
);
183 *p
++ = xdr_one
; /* next */
184 *p
++ = xdr_zero
; /* cookie, first word */
185 *p
++ = xdr_two
; /* cookie, second word */
186 *p
++ = xdr_two
; /* entry len */
187 memcpy(p
, "..\0\0", 4); /* entry */
189 *p
++ = xdr_one
; /* bitmap length */
190 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
191 *p
++ = htonl(8); /* attribute buffer length */
192 p
= xdr_encode_hyper(p
, dentry
->d_parent
->d_inode
->i_ino
);
194 readdir
->pgbase
= (char *)p
- (char *)start
;
195 readdir
->count
-= readdir
->pgbase
;
196 kunmap_atomic(start
, KM_USER0
);
199 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
201 struct nfs_client
*clp
= server
->nfs_client
;
202 spin_lock(&clp
->cl_lock
);
203 if (time_before(clp
->cl_last_renewal
,timestamp
))
204 clp
->cl_last_renewal
= timestamp
;
205 spin_unlock(&clp
->cl_lock
);
208 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
210 struct nfs_inode
*nfsi
= NFS_I(dir
);
212 spin_lock(&dir
->i_lock
);
213 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
214 if (cinfo
->before
== nfsi
->change_attr
&& cinfo
->atomic
)
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
.server
= p
->o_arg
.server
;
244 nfs_fattr_init(&p
->f_attr
);
245 nfs_fattr_init(&p
->dir_attr
);
248 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
249 struct nfs4_state_owner
*sp
, int flags
,
250 const struct iattr
*attrs
)
252 struct dentry
*parent
= dget_parent(path
->dentry
);
253 struct inode
*dir
= parent
->d_inode
;
254 struct nfs_server
*server
= NFS_SERVER(dir
);
255 struct nfs4_opendata
*p
;
257 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
260 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
261 if (p
->o_arg
.seqid
== NULL
)
263 p
->path
.mnt
= mntget(path
->mnt
);
264 p
->path
.dentry
= dget(path
->dentry
);
267 atomic_inc(&sp
->so_count
);
268 p
->o_arg
.fh
= NFS_FH(dir
);
269 p
->o_arg
.open_flags
= flags
,
270 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
271 p
->o_arg
.id
= sp
->so_owner_id
.id
;
272 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
273 p
->o_arg
.server
= server
;
274 p
->o_arg
.bitmask
= server
->attr_bitmask
;
275 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
276 if (flags
& O_EXCL
) {
277 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
280 } else if (flags
& O_CREAT
) {
281 p
->o_arg
.u
.attrs
= &p
->attrs
;
282 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
284 p
->c_arg
.fh
= &p
->o_res
.fh
;
285 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
286 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
287 nfs4_init_opendata_res(p
);
297 static void nfs4_opendata_free(struct kref
*kref
)
299 struct nfs4_opendata
*p
= container_of(kref
,
300 struct nfs4_opendata
, kref
);
302 nfs_free_seqid(p
->o_arg
.seqid
);
303 if (p
->state
!= NULL
)
304 nfs4_put_open_state(p
->state
);
305 nfs4_put_state_owner(p
->owner
);
307 dput(p
->path
.dentry
);
312 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
315 kref_put(&p
->kref
, nfs4_opendata_free
);
318 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
323 rpc_clnt_sigmask(task
->tk_client
, &oldset
);
324 ret
= rpc_wait_for_completion_task(task
);
325 rpc_clnt_sigunmask(task
->tk_client
, &oldset
);
329 static int can_open_cached(struct nfs4_state
*state
, int mode
)
332 switch (mode
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)) {
334 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
335 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
338 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
339 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
341 case FMODE_READ
|FMODE_WRITE
:
342 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
347 static int can_open_delegated(struct nfs_delegation
*delegation
, mode_t open_flags
)
349 if ((delegation
->type
& open_flags
) != open_flags
)
351 if (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)
356 static void update_open_stateflags(struct nfs4_state
*state
, mode_t open_flags
)
358 switch (open_flags
) {
365 case FMODE_READ
|FMODE_WRITE
:
368 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
371 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
373 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
374 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
375 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
376 switch (open_flags
) {
378 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
381 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
383 case FMODE_READ
|FMODE_WRITE
:
384 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
388 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
390 write_seqlock(&state
->seqlock
);
391 nfs_set_open_stateid_locked(state
, stateid
, open_flags
);
392 write_sequnlock(&state
->seqlock
);
395 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*deleg_stateid
, int open_flags
)
397 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
399 * Protect the call to nfs4_state_set_mode_locked and
400 * serialise the stateid update
402 write_seqlock(&state
->seqlock
);
403 if (deleg_stateid
!= NULL
) {
404 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
405 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
407 if (open_stateid
!= NULL
)
408 nfs_set_open_stateid_locked(state
, open_stateid
, open_flags
);
409 write_sequnlock(&state
->seqlock
);
410 spin_lock(&state
->owner
->so_lock
);
411 update_open_stateflags(state
, open_flags
);
412 spin_unlock(&state
->owner
->so_lock
);
415 static void nfs4_return_incompatible_delegation(struct inode
*inode
, mode_t open_flags
)
417 struct nfs_delegation
*delegation
;
420 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
421 if (delegation
== NULL
|| (delegation
->type
& open_flags
) == open_flags
) {
426 nfs_inode_return_delegation(inode
);
429 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
431 struct nfs4_state
*state
= opendata
->state
;
432 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
433 struct nfs_delegation
*delegation
;
434 int open_mode
= opendata
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
);
435 nfs4_stateid stateid
;
439 delegation
= rcu_dereference(nfsi
->delegation
);
441 if (can_open_cached(state
, open_mode
)) {
442 spin_lock(&state
->owner
->so_lock
);
443 if (can_open_cached(state
, open_mode
)) {
444 update_open_stateflags(state
, open_mode
);
445 spin_unlock(&state
->owner
->so_lock
);
447 goto out_return_state
;
449 spin_unlock(&state
->owner
->so_lock
);
451 if (delegation
== NULL
)
453 if (!can_open_delegated(delegation
, open_mode
))
455 /* Save the delegation */
456 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
459 ret
= _nfs4_do_access(state
->inode
, state
->owner
->so_cred
, open_mode
);
465 delegation
= rcu_dereference(nfsi
->delegation
);
466 /* If no delegation, try a cached open */
467 if (delegation
== NULL
)
469 /* Is the delegation still valid? */
470 if (memcmp(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
)) != 0)
473 update_open_stateid(state
, NULL
, &stateid
, open_mode
);
474 goto out_return_state
;
480 atomic_inc(&state
->count
);
484 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
487 struct nfs4_state
*state
= NULL
;
488 struct nfs_delegation
*delegation
;
489 nfs4_stateid
*deleg_stateid
= NULL
;
492 if (!data
->rpc_done
) {
493 state
= nfs4_try_open_cached(data
);
498 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
500 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
501 ret
= PTR_ERR(inode
);
505 state
= nfs4_get_open_state(inode
, data
->owner
);
508 if (data
->o_res
.delegation_type
!= 0) {
509 int delegation_flags
= 0;
512 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
514 delegation_flags
= delegation
->flags
;
516 if (!(delegation_flags
& NFS_DELEGATION_NEED_RECLAIM
))
517 nfs_inode_set_delegation(state
->inode
,
518 data
->owner
->so_cred
,
521 nfs_inode_reclaim_delegation(state
->inode
,
522 data
->owner
->so_cred
,
526 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
527 if (delegation
!= NULL
)
528 deleg_stateid
= &delegation
->stateid
;
529 update_open_stateid(state
, &data
->o_res
.stateid
, deleg_stateid
, data
->o_arg
.open_flags
);
540 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
542 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
543 struct nfs_open_context
*ctx
;
545 spin_lock(&state
->inode
->i_lock
);
546 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
547 if (ctx
->state
!= state
)
549 get_nfs_open_context(ctx
);
550 spin_unlock(&state
->inode
->i_lock
);
553 spin_unlock(&state
->inode
->i_lock
);
554 return ERR_PTR(-ENOENT
);
557 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
559 struct nfs4_opendata
*opendata
;
561 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
562 if (opendata
== NULL
)
563 return ERR_PTR(-ENOMEM
);
564 opendata
->state
= state
;
565 atomic_inc(&state
->count
);
569 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
571 struct nfs4_state
*newstate
;
574 opendata
->o_arg
.open_flags
= openflags
;
575 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
576 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
577 nfs4_init_opendata_res(opendata
);
578 ret
= _nfs4_proc_open(opendata
);
581 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
582 if (IS_ERR(newstate
))
583 return PTR_ERR(newstate
);
584 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
589 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
591 struct nfs4_state
*newstate
;
594 /* memory barrier prior to reading state->n_* */
595 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
597 if (state
->n_rdwr
!= 0) {
598 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
601 if (newstate
!= state
)
604 if (state
->n_wronly
!= 0) {
605 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
608 if (newstate
!= state
)
611 if (state
->n_rdonly
!= 0) {
612 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
615 if (newstate
!= state
)
619 * We may have performed cached opens for all three recoveries.
620 * Check if we need to update the current stateid.
622 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
623 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
624 write_seqlock(&state
->seqlock
);
625 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
626 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
627 write_sequnlock(&state
->seqlock
);
634 * reclaim state on the server after a reboot.
636 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
638 struct nfs_delegation
*delegation
;
639 struct nfs4_opendata
*opendata
;
640 int delegation_type
= 0;
643 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
644 if (IS_ERR(opendata
))
645 return PTR_ERR(opendata
);
646 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
647 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
649 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
650 if (delegation
!= NULL
&& (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) != 0)
651 delegation_type
= delegation
->flags
;
653 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
654 status
= nfs4_open_recover(opendata
, state
);
655 nfs4_opendata_put(opendata
);
659 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
661 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
662 struct nfs4_exception exception
= { };
665 err
= _nfs4_do_open_reclaim(ctx
, state
);
666 if (err
!= -NFS4ERR_DELAY
)
668 nfs4_handle_exception(server
, err
, &exception
);
669 } while (exception
.retry
);
673 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
675 struct nfs_open_context
*ctx
;
678 ctx
= nfs4_state_find_open_context(state
);
681 ret
= nfs4_do_open_reclaim(ctx
, state
);
682 put_nfs_open_context(ctx
);
686 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
688 struct nfs4_opendata
*opendata
;
691 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
692 if (IS_ERR(opendata
))
693 return PTR_ERR(opendata
);
694 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
695 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
696 sizeof(opendata
->o_arg
.u
.delegation
.data
));
697 ret
= nfs4_open_recover(opendata
, state
);
698 nfs4_opendata_put(opendata
);
702 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
704 struct nfs4_exception exception
= { };
705 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
708 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
712 case -NFS4ERR_STALE_CLIENTID
:
713 case -NFS4ERR_STALE_STATEID
:
714 case -NFS4ERR_EXPIRED
:
715 /* Don't recall a delegation if it was lost */
716 nfs4_schedule_state_recovery(server
->nfs_client
);
719 err
= nfs4_handle_exception(server
, err
, &exception
);
720 } while (exception
.retry
);
724 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
726 struct nfs4_opendata
*data
= calldata
;
727 struct rpc_message msg
= {
728 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
729 .rpc_argp
= &data
->c_arg
,
730 .rpc_resp
= &data
->c_res
,
731 .rpc_cred
= data
->owner
->so_cred
,
733 data
->timestamp
= jiffies
;
734 rpc_call_setup(task
, &msg
, 0);
737 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
739 struct nfs4_opendata
*data
= calldata
;
741 data
->rpc_status
= task
->tk_status
;
742 if (RPC_ASSASSINATED(task
))
744 if (data
->rpc_status
== 0) {
745 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
746 sizeof(data
->o_res
.stateid
.data
));
747 renew_lease(data
->o_res
.server
, data
->timestamp
);
750 nfs_confirm_seqid(&data
->owner
->so_seqid
, data
->rpc_status
);
751 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
754 static void nfs4_open_confirm_release(void *calldata
)
756 struct nfs4_opendata
*data
= calldata
;
757 struct nfs4_state
*state
= NULL
;
759 /* If this request hasn't been cancelled, do nothing */
760 if (data
->cancelled
== 0)
762 /* In case of error, no cleanup! */
765 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
766 state
= nfs4_opendata_to_nfs4_state(data
);
768 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
770 nfs4_opendata_put(data
);
773 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
774 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
775 .rpc_call_done
= nfs4_open_confirm_done
,
776 .rpc_release
= nfs4_open_confirm_release
,
780 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
782 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
784 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
785 struct rpc_task
*task
;
788 kref_get(&data
->kref
);
790 data
->rpc_status
= 0;
791 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
793 return PTR_ERR(task
);
794 status
= nfs4_wait_for_completion_rpc_task(task
);
799 status
= data
->rpc_status
;
804 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
806 struct nfs4_opendata
*data
= calldata
;
807 struct nfs4_state_owner
*sp
= data
->owner
;
808 struct rpc_message msg
= {
809 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
810 .rpc_argp
= &data
->o_arg
,
811 .rpc_resp
= &data
->o_res
,
812 .rpc_cred
= sp
->so_cred
,
815 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
818 * Check if we still need to send an OPEN call, or if we can use
819 * a delegation instead.
821 if (data
->state
!= NULL
) {
822 struct nfs_delegation
*delegation
;
824 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
827 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
828 if (delegation
!= NULL
&&
829 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
835 /* Update sequence id. */
836 data
->o_arg
.id
= sp
->so_owner_id
.id
;
837 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
838 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
839 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
840 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
842 data
->timestamp
= jiffies
;
843 rpc_call_setup(task
, &msg
, 0);
846 task
->tk_action
= NULL
;
850 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
852 struct nfs4_opendata
*data
= calldata
;
854 data
->rpc_status
= task
->tk_status
;
855 if (RPC_ASSASSINATED(task
))
857 if (task
->tk_status
== 0) {
858 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
862 data
->rpc_status
= -ELOOP
;
865 data
->rpc_status
= -EISDIR
;
868 data
->rpc_status
= -ENOTDIR
;
870 renew_lease(data
->o_res
.server
, data
->timestamp
);
871 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
872 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
874 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
878 static void nfs4_open_release(void *calldata
)
880 struct nfs4_opendata
*data
= calldata
;
881 struct nfs4_state
*state
= NULL
;
883 /* If this request hasn't been cancelled, do nothing */
884 if (data
->cancelled
== 0)
886 /* In case of error, no cleanup! */
887 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
889 /* In case we need an open_confirm, no cleanup! */
890 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
892 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
893 state
= nfs4_opendata_to_nfs4_state(data
);
895 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
897 nfs4_opendata_put(data
);
900 static const struct rpc_call_ops nfs4_open_ops
= {
901 .rpc_call_prepare
= nfs4_open_prepare
,
902 .rpc_call_done
= nfs4_open_done
,
903 .rpc_release
= nfs4_open_release
,
907 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
909 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
911 struct inode
*dir
= data
->dir
->d_inode
;
912 struct nfs_server
*server
= NFS_SERVER(dir
);
913 struct nfs_openargs
*o_arg
= &data
->o_arg
;
914 struct nfs_openres
*o_res
= &data
->o_res
;
915 struct rpc_task
*task
;
918 kref_get(&data
->kref
);
920 data
->rpc_status
= 0;
922 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
924 return PTR_ERR(task
);
925 status
= nfs4_wait_for_completion_rpc_task(task
);
930 status
= data
->rpc_status
;
932 if (status
!= 0 || !data
->rpc_done
)
935 if (o_res
->fh
.size
== 0)
936 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
938 if (o_arg
->open_flags
& O_CREAT
) {
939 update_changeattr(dir
, &o_res
->cinfo
);
940 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
942 nfs_refresh_inode(dir
, o_res
->dir_attr
);
943 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
944 status
= _nfs4_proc_open_confirm(data
);
948 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
949 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
953 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
955 struct nfs_access_entry cache
;
959 if (openflags
& FMODE_READ
)
961 if (openflags
& FMODE_WRITE
)
963 if (openflags
& FMODE_EXEC
)
965 status
= nfs_access_get_cached(inode
, cred
, &cache
);
969 /* Be clever: ask server to check for all possible rights */
970 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
972 cache
.jiffies
= jiffies
;
973 status
= _nfs4_proc_access(inode
, &cache
);
976 nfs_access_add_cache(inode
, &cache
);
978 if ((cache
.mask
& mask
) == mask
)
983 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
985 struct nfs_client
*clp
= server
->nfs_client
;
989 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
992 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
994 nfs4_schedule_state_recovery(clp
);
1001 * reclaim state on the server after a network partition.
1002 * Assumes caller holds the appropriate lock
1004 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1006 struct nfs4_opendata
*opendata
;
1009 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1010 if (IS_ERR(opendata
))
1011 return PTR_ERR(opendata
);
1012 ret
= nfs4_open_recover(opendata
, state
);
1013 if (ret
== -ESTALE
) {
1014 /* Invalidate the state owner so we don't ever use it again */
1015 nfs4_drop_state_owner(state
->owner
);
1016 d_drop(ctx
->path
.dentry
);
1018 nfs4_opendata_put(opendata
);
1022 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1024 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1025 struct nfs4_exception exception
= { };
1029 err
= _nfs4_open_expired(ctx
, state
);
1030 if (err
== -NFS4ERR_DELAY
)
1031 nfs4_handle_exception(server
, err
, &exception
);
1032 } while (exception
.retry
);
1036 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1038 struct nfs_open_context
*ctx
;
1041 ctx
= nfs4_state_find_open_context(state
);
1043 return PTR_ERR(ctx
);
1044 ret
= nfs4_do_open_expired(ctx
, state
);
1045 put_nfs_open_context(ctx
);
1050 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1051 * fields corresponding to attributes that were used to store the verifier.
1052 * Make sure we clobber those fields in the later setattr call
1054 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1056 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1057 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1058 sattr
->ia_valid
|= ATTR_ATIME
;
1060 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1061 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1062 sattr
->ia_valid
|= ATTR_MTIME
;
1066 * Returns a referenced nfs4_state
1068 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1070 struct nfs4_state_owner
*sp
;
1071 struct nfs4_state
*state
= NULL
;
1072 struct nfs_server
*server
= NFS_SERVER(dir
);
1073 struct nfs_client
*clp
= server
->nfs_client
;
1074 struct nfs4_opendata
*opendata
;
1077 /* Protect against reboot recovery conflicts */
1079 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1080 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1083 status
= nfs4_recover_expired_lease(server
);
1085 goto err_put_state_owner
;
1086 if (path
->dentry
->d_inode
!= NULL
)
1087 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1088 down_read(&clp
->cl_sem
);
1090 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1091 if (opendata
== NULL
)
1092 goto err_release_rwsem
;
1094 if (path
->dentry
->d_inode
!= NULL
)
1095 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1097 status
= _nfs4_proc_open(opendata
);
1099 goto err_opendata_put
;
1101 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1102 nfs4_exclusive_attrset(opendata
, sattr
);
1104 state
= nfs4_opendata_to_nfs4_state(opendata
);
1105 status
= PTR_ERR(state
);
1107 goto err_opendata_put
;
1108 nfs4_opendata_put(opendata
);
1109 nfs4_put_state_owner(sp
);
1110 up_read(&clp
->cl_sem
);
1114 nfs4_opendata_put(opendata
);
1116 up_read(&clp
->cl_sem
);
1117 err_put_state_owner
:
1118 nfs4_put_state_owner(sp
);
1125 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1127 struct nfs4_exception exception
= { };
1128 struct nfs4_state
*res
;
1132 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1135 /* NOTE: BAD_SEQID means the server and client disagree about the
1136 * book-keeping w.r.t. state-changing operations
1137 * (OPEN/CLOSE/LOCK/LOCKU...)
1138 * It is actually a sign of a bug on the client or on the server.
1140 * If we receive a BAD_SEQID error in the particular case of
1141 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1142 * have unhashed the old state_owner for us, and that we can
1143 * therefore safely retry using a new one. We should still warn
1144 * the user though...
1146 if (status
== -NFS4ERR_BAD_SEQID
) {
1147 printk(KERN_WARNING
"NFS: v4 server %s "
1148 " returned a bad sequence-id error!\n",
1149 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1150 exception
.retry
= 1;
1154 * BAD_STATEID on OPEN means that the server cancelled our
1155 * state before it received the OPEN_CONFIRM.
1156 * Recover by retrying the request as per the discussion
1157 * on Page 181 of RFC3530.
1159 if (status
== -NFS4ERR_BAD_STATEID
) {
1160 exception
.retry
= 1;
1163 if (status
== -EAGAIN
) {
1164 /* We must have found a delegation */
1165 exception
.retry
= 1;
1168 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1169 status
, &exception
));
1170 } while (exception
.retry
);
1174 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1175 struct iattr
*sattr
, struct nfs4_state
*state
)
1177 struct nfs_server
*server
= NFS_SERVER(inode
);
1178 struct nfs_setattrargs arg
= {
1179 .fh
= NFS_FH(inode
),
1182 .bitmask
= server
->attr_bitmask
,
1184 struct nfs_setattrres res
= {
1188 struct rpc_message msg
= {
1189 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1193 unsigned long timestamp
= jiffies
;
1196 nfs_fattr_init(fattr
);
1198 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1199 /* Use that stateid */
1200 } else if (state
!= NULL
) {
1201 msg
.rpc_cred
= state
->owner
->so_cred
;
1202 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1204 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1206 status
= rpc_call_sync(server
->client
, &msg
, 0);
1207 if (status
== 0 && state
!= NULL
)
1208 renew_lease(server
, timestamp
);
1212 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1213 struct iattr
*sattr
, struct nfs4_state
*state
)
1215 struct nfs_server
*server
= NFS_SERVER(inode
);
1216 struct nfs4_exception exception
= { };
1219 err
= nfs4_handle_exception(server
,
1220 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1222 } while (exception
.retry
);
1226 struct nfs4_closedata
{
1228 struct inode
*inode
;
1229 struct nfs4_state
*state
;
1230 struct nfs_closeargs arg
;
1231 struct nfs_closeres res
;
1232 struct nfs_fattr fattr
;
1233 unsigned long timestamp
;
1236 static void nfs4_free_closedata(void *data
)
1238 struct nfs4_closedata
*calldata
= data
;
1239 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1241 nfs4_put_open_state(calldata
->state
);
1242 nfs_free_seqid(calldata
->arg
.seqid
);
1243 nfs4_put_state_owner(sp
);
1244 dput(calldata
->path
.dentry
);
1245 mntput(calldata
->path
.mnt
);
1249 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1251 struct nfs4_closedata
*calldata
= data
;
1252 struct nfs4_state
*state
= calldata
->state
;
1253 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1255 if (RPC_ASSASSINATED(task
))
1257 /* hmm. we are done with the inode, and in the process of freeing
1258 * the state_owner. we keep this around to process errors
1260 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1261 switch (task
->tk_status
) {
1263 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, calldata
->arg
.open_flags
);
1264 renew_lease(server
, calldata
->timestamp
);
1266 case -NFS4ERR_STALE_STATEID
:
1267 case -NFS4ERR_EXPIRED
:
1270 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1271 rpc_restart_call(task
);
1275 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1278 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1280 struct nfs4_closedata
*calldata
= data
;
1281 struct nfs4_state
*state
= calldata
->state
;
1282 struct rpc_message msg
= {
1283 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1284 .rpc_argp
= &calldata
->arg
,
1285 .rpc_resp
= &calldata
->res
,
1286 .rpc_cred
= state
->owner
->so_cred
,
1288 int clear_rd
, clear_wr
, clear_rdwr
;
1291 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1294 mode
= FMODE_READ
|FMODE_WRITE
;
1295 clear_rd
= clear_wr
= clear_rdwr
= 0;
1296 spin_lock(&state
->owner
->so_lock
);
1297 /* Calculate the change in open mode */
1298 if (state
->n_rdwr
== 0) {
1299 if (state
->n_rdonly
== 0) {
1300 mode
&= ~FMODE_READ
;
1301 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1302 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1304 if (state
->n_wronly
== 0) {
1305 mode
&= ~FMODE_WRITE
;
1306 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1307 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1310 spin_unlock(&state
->owner
->so_lock
);
1311 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1312 /* Note: exit _without_ calling nfs4_close_done */
1313 task
->tk_action
= NULL
;
1316 nfs_fattr_init(calldata
->res
.fattr
);
1318 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1319 calldata
->arg
.open_flags
= mode
;
1320 calldata
->timestamp
= jiffies
;
1321 rpc_call_setup(task
, &msg
, 0);
1324 static const struct rpc_call_ops nfs4_close_ops
= {
1325 .rpc_call_prepare
= nfs4_close_prepare
,
1326 .rpc_call_done
= nfs4_close_done
,
1327 .rpc_release
= nfs4_free_closedata
,
1331 * It is possible for data to be read/written from a mem-mapped file
1332 * after the sys_close call (which hits the vfs layer as a flush).
1333 * This means that we can't safely call nfsv4 close on a file until
1334 * the inode is cleared. This in turn means that we are not good
1335 * NFSv4 citizens - we do not indicate to the server to update the file's
1336 * share state even when we are done with one of the three share
1337 * stateid's in the inode.
1339 * NOTE: Caller must be holding the sp->so_owner semaphore!
1341 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
)
1343 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1344 struct nfs4_closedata
*calldata
;
1345 struct nfs4_state_owner
*sp
= state
->owner
;
1346 struct rpc_task
*task
;
1347 int status
= -ENOMEM
;
1349 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1350 if (calldata
== NULL
)
1352 calldata
->inode
= state
->inode
;
1353 calldata
->state
= state
;
1354 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1355 calldata
->arg
.stateid
= &state
->open_stateid
;
1356 /* Serialization for the sequence id */
1357 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1358 if (calldata
->arg
.seqid
== NULL
)
1359 goto out_free_calldata
;
1360 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1361 calldata
->res
.fattr
= &calldata
->fattr
;
1362 calldata
->res
.server
= server
;
1363 calldata
->path
.mnt
= mntget(path
->mnt
);
1364 calldata
->path
.dentry
= dget(path
->dentry
);
1366 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_close_ops
, calldata
);
1368 return PTR_ERR(task
);
1374 nfs4_put_open_state(state
);
1375 nfs4_put_state_owner(sp
);
1379 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1384 /* If the open_intent is for execute, we have an extra check to make */
1385 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1386 ret
= _nfs4_do_access(state
->inode
,
1387 state
->owner
->so_cred
,
1388 nd
->intent
.open
.flags
);
1392 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1393 if (!IS_ERR(filp
)) {
1394 struct nfs_open_context
*ctx
;
1395 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1399 ret
= PTR_ERR(filp
);
1401 nfs4_close_state(path
, state
, nd
->intent
.open
.flags
);
1406 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1408 struct path path
= {
1413 struct rpc_cred
*cred
;
1414 struct nfs4_state
*state
;
1417 if (nd
->flags
& LOOKUP_CREATE
) {
1418 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1419 attr
.ia_valid
= ATTR_MODE
;
1420 if (!IS_POSIXACL(dir
))
1421 attr
.ia_mode
&= ~current
->fs
->umask
;
1424 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1427 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1429 return (struct dentry
*)cred
;
1430 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1432 if (IS_ERR(state
)) {
1433 if (PTR_ERR(state
) == -ENOENT
)
1434 d_add(dentry
, NULL
);
1435 return (struct dentry
*)state
;
1437 res
= d_add_unique(dentry
, igrab(state
->inode
));
1440 nfs4_intent_set_file(nd
, &path
, state
);
1445 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1447 struct path path
= {
1451 struct rpc_cred
*cred
;
1452 struct nfs4_state
*state
;
1454 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1456 return PTR_ERR(cred
);
1457 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1459 if (IS_ERR(state
)) {
1460 switch (PTR_ERR(state
)) {
1466 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1472 if (state
->inode
== dentry
->d_inode
) {
1473 nfs4_intent_set_file(nd
, &path
, state
);
1476 nfs4_close_state(&path
, state
, openflags
);
1483 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1485 struct nfs4_server_caps_res res
= {};
1486 struct rpc_message msg
= {
1487 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1488 .rpc_argp
= fhandle
,
1493 status
= rpc_call_sync(server
->client
, &msg
, 0);
1495 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1496 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1497 server
->caps
|= NFS_CAP_ACLS
;
1498 if (res
.has_links
!= 0)
1499 server
->caps
|= NFS_CAP_HARDLINKS
;
1500 if (res
.has_symlinks
!= 0)
1501 server
->caps
|= NFS_CAP_SYMLINKS
;
1502 server
->acl_bitmask
= res
.acl_bitmask
;
1507 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1509 struct nfs4_exception exception
= { };
1512 err
= nfs4_handle_exception(server
,
1513 _nfs4_server_capabilities(server
, fhandle
),
1515 } while (exception
.retry
);
1519 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1520 struct nfs_fsinfo
*info
)
1522 struct nfs4_lookup_root_arg args
= {
1523 .bitmask
= nfs4_fattr_bitmap
,
1525 struct nfs4_lookup_res res
= {
1527 .fattr
= info
->fattr
,
1530 struct rpc_message msg
= {
1531 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1535 nfs_fattr_init(info
->fattr
);
1536 return rpc_call_sync(server
->client
, &msg
, 0);
1539 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1540 struct nfs_fsinfo
*info
)
1542 struct nfs4_exception exception
= { };
1545 err
= nfs4_handle_exception(server
,
1546 _nfs4_lookup_root(server
, fhandle
, info
),
1548 } while (exception
.retry
);
1553 * get the file handle for the "/" directory on the server
1555 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1556 struct nfs_fsinfo
*info
)
1560 status
= nfs4_lookup_root(server
, fhandle
, info
);
1562 status
= nfs4_server_capabilities(server
, fhandle
);
1564 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1565 return nfs4_map_errors(status
);
1569 * Get locations and (maybe) other attributes of a referral.
1570 * Note that we'll actually follow the referral later when
1571 * we detect fsid mismatch in inode revalidation
1573 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1575 int status
= -ENOMEM
;
1576 struct page
*page
= NULL
;
1577 struct nfs4_fs_locations
*locations
= NULL
;
1579 page
= alloc_page(GFP_KERNEL
);
1582 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1583 if (locations
== NULL
)
1586 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1589 /* Make sure server returned a different fsid for the referral */
1590 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1591 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1596 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1597 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1599 fattr
->mode
= S_IFDIR
;
1600 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1609 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1611 struct nfs4_getattr_arg args
= {
1613 .bitmask
= server
->attr_bitmask
,
1615 struct nfs4_getattr_res res
= {
1619 struct rpc_message msg
= {
1620 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1625 nfs_fattr_init(fattr
);
1626 return rpc_call_sync(server
->client
, &msg
, 0);
1629 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1631 struct nfs4_exception exception
= { };
1634 err
= nfs4_handle_exception(server
,
1635 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1637 } while (exception
.retry
);
1642 * The file is not closed if it is opened due to the a request to change
1643 * the size of the file. The open call will not be needed once the
1644 * VFS layer lookup-intents are implemented.
1646 * Close is called when the inode is destroyed.
1647 * If we haven't opened the file for O_WRONLY, we
1648 * need to in the size_change case to obtain a stateid.
1651 * Because OPEN is always done by name in nfsv4, it is
1652 * possible that we opened a different file by the same
1653 * name. We can recognize this race condition, but we
1654 * can't do anything about it besides returning an error.
1656 * This will be fixed with VFS changes (lookup-intent).
1659 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1660 struct iattr
*sattr
)
1662 struct rpc_cred
*cred
;
1663 struct inode
*inode
= dentry
->d_inode
;
1664 struct nfs_open_context
*ctx
;
1665 struct nfs4_state
*state
= NULL
;
1668 nfs_fattr_init(fattr
);
1670 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1672 return PTR_ERR(cred
);
1674 /* Search for an existing open(O_WRITE) file */
1675 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1679 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1681 nfs_setattr_update_inode(inode
, sattr
);
1683 put_nfs_open_context(ctx
);
1688 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1689 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1690 struct nfs_fattr
*fattr
)
1693 struct nfs4_lookup_arg args
= {
1694 .bitmask
= server
->attr_bitmask
,
1698 struct nfs4_lookup_res res
= {
1703 struct rpc_message msg
= {
1704 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1709 nfs_fattr_init(fattr
);
1711 dprintk("NFS call lookupfh %s\n", name
->name
);
1712 status
= rpc_call_sync(server
->client
, &msg
, 0);
1713 dprintk("NFS reply lookupfh: %d\n", status
);
1717 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1718 struct qstr
*name
, struct nfs_fh
*fhandle
,
1719 struct nfs_fattr
*fattr
)
1721 struct nfs4_exception exception
= { };
1724 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1726 if (err
== -NFS4ERR_MOVED
) {
1730 err
= nfs4_handle_exception(server
, err
, &exception
);
1731 } while (exception
.retry
);
1735 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1736 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1740 dprintk("NFS call lookup %s\n", name
->name
);
1741 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1742 if (status
== -NFS4ERR_MOVED
)
1743 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1744 dprintk("NFS reply lookup: %d\n", status
);
1748 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1750 struct nfs4_exception exception
= { };
1753 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1754 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1756 } while (exception
.retry
);
1760 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1762 struct nfs4_accessargs args
= {
1763 .fh
= NFS_FH(inode
),
1765 struct nfs4_accessres res
= { 0 };
1766 struct rpc_message msg
= {
1767 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1770 .rpc_cred
= entry
->cred
,
1772 int mode
= entry
->mask
;
1776 * Determine which access bits we want to ask for...
1778 if (mode
& MAY_READ
)
1779 args
.access
|= NFS4_ACCESS_READ
;
1780 if (S_ISDIR(inode
->i_mode
)) {
1781 if (mode
& MAY_WRITE
)
1782 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1783 if (mode
& MAY_EXEC
)
1784 args
.access
|= NFS4_ACCESS_LOOKUP
;
1786 if (mode
& MAY_WRITE
)
1787 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1788 if (mode
& MAY_EXEC
)
1789 args
.access
|= NFS4_ACCESS_EXECUTE
;
1791 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1794 if (res
.access
& NFS4_ACCESS_READ
)
1795 entry
->mask
|= MAY_READ
;
1796 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1797 entry
->mask
|= MAY_WRITE
;
1798 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1799 entry
->mask
|= MAY_EXEC
;
1804 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1806 struct nfs4_exception exception
= { };
1809 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1810 _nfs4_proc_access(inode
, entry
),
1812 } while (exception
.retry
);
1817 * TODO: For the time being, we don't try to get any attributes
1818 * along with any of the zero-copy operations READ, READDIR,
1821 * In the case of the first three, we want to put the GETATTR
1822 * after the read-type operation -- this is because it is hard
1823 * to predict the length of a GETATTR response in v4, and thus
1824 * align the READ data correctly. This means that the GETATTR
1825 * may end up partially falling into the page cache, and we should
1826 * shift it into the 'tail' of the xdr_buf before processing.
1827 * To do this efficiently, we need to know the total length
1828 * of data received, which doesn't seem to be available outside
1831 * In the case of WRITE, we also want to put the GETATTR after
1832 * the operation -- in this case because we want to make sure
1833 * we get the post-operation mtime and size. This means that
1834 * we can't use xdr_encode_pages() as written: we need a variant
1835 * of it which would leave room in the 'tail' iovec.
1837 * Both of these changes to the XDR layer would in fact be quite
1838 * minor, but I decided to leave them for a subsequent patch.
1840 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1841 unsigned int pgbase
, unsigned int pglen
)
1843 struct nfs4_readlink args
= {
1844 .fh
= NFS_FH(inode
),
1849 struct rpc_message msg
= {
1850 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1855 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1858 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1859 unsigned int pgbase
, unsigned int pglen
)
1861 struct nfs4_exception exception
= { };
1864 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1865 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1867 } while (exception
.retry
);
1873 * We will need to arrange for the VFS layer to provide an atomic open.
1874 * Until then, this create/open method is prone to inefficiency and race
1875 * conditions due to the lookup, create, and open VFS calls from sys_open()
1876 * placed on the wire.
1878 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1879 * The file will be opened again in the subsequent VFS open call
1880 * (nfs4_proc_file_open).
1882 * The open for read will just hang around to be used by any process that
1883 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1887 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1888 int flags
, struct nameidata
*nd
)
1890 struct path path
= {
1894 struct nfs4_state
*state
;
1895 struct rpc_cred
*cred
;
1898 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1900 status
= PTR_ERR(cred
);
1903 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1905 if (IS_ERR(state
)) {
1906 status
= PTR_ERR(state
);
1909 d_instantiate(dentry
, igrab(state
->inode
));
1910 if (flags
& O_EXCL
) {
1911 struct nfs_fattr fattr
;
1912 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1914 nfs_setattr_update_inode(state
->inode
, sattr
);
1915 nfs_post_op_update_inode(state
->inode
, &fattr
);
1917 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1918 status
= nfs4_intent_set_file(nd
, &path
, state
);
1920 nfs4_close_state(&path
, state
, flags
);
1925 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1927 struct nfs_server
*server
= NFS_SERVER(dir
);
1928 struct nfs_removeargs args
= {
1930 .name
.len
= name
->len
,
1931 .name
.name
= name
->name
,
1932 .bitmask
= server
->attr_bitmask
,
1934 struct nfs_removeres res
= {
1937 struct rpc_message msg
= {
1938 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1944 nfs_fattr_init(&res
.dir_attr
);
1945 status
= rpc_call_sync(server
->client
, &msg
, 0);
1947 update_changeattr(dir
, &res
.cinfo
);
1948 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
1953 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1955 struct nfs4_exception exception
= { };
1958 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1959 _nfs4_proc_remove(dir
, name
),
1961 } while (exception
.retry
);
1965 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
1967 struct nfs_server
*server
= NFS_SERVER(dir
);
1968 struct nfs_removeargs
*args
= msg
->rpc_argp
;
1969 struct nfs_removeres
*res
= msg
->rpc_resp
;
1971 args
->bitmask
= server
->attr_bitmask
;
1972 res
->server
= server
;
1973 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1976 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
1978 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
1980 if (nfs4_async_handle_error(task
, res
->server
) == -EAGAIN
)
1982 update_changeattr(dir
, &res
->cinfo
);
1983 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
1987 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1988 struct inode
*new_dir
, struct qstr
*new_name
)
1990 struct nfs_server
*server
= NFS_SERVER(old_dir
);
1991 struct nfs4_rename_arg arg
= {
1992 .old_dir
= NFS_FH(old_dir
),
1993 .new_dir
= NFS_FH(new_dir
),
1994 .old_name
= old_name
,
1995 .new_name
= new_name
,
1996 .bitmask
= server
->attr_bitmask
,
1998 struct nfs_fattr old_fattr
, new_fattr
;
1999 struct nfs4_rename_res res
= {
2001 .old_fattr
= &old_fattr
,
2002 .new_fattr
= &new_fattr
,
2004 struct rpc_message msg
= {
2005 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2011 nfs_fattr_init(res
.old_fattr
);
2012 nfs_fattr_init(res
.new_fattr
);
2013 status
= rpc_call_sync(server
->client
, &msg
, 0);
2016 update_changeattr(old_dir
, &res
.old_cinfo
);
2017 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2018 update_changeattr(new_dir
, &res
.new_cinfo
);
2019 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2024 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2025 struct inode
*new_dir
, struct qstr
*new_name
)
2027 struct nfs4_exception exception
= { };
2030 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2031 _nfs4_proc_rename(old_dir
, old_name
,
2034 } while (exception
.retry
);
2038 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2040 struct nfs_server
*server
= NFS_SERVER(inode
);
2041 struct nfs4_link_arg arg
= {
2042 .fh
= NFS_FH(inode
),
2043 .dir_fh
= NFS_FH(dir
),
2045 .bitmask
= server
->attr_bitmask
,
2047 struct nfs_fattr fattr
, dir_attr
;
2048 struct nfs4_link_res res
= {
2051 .dir_attr
= &dir_attr
,
2053 struct rpc_message msg
= {
2054 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2060 nfs_fattr_init(res
.fattr
);
2061 nfs_fattr_init(res
.dir_attr
);
2062 status
= rpc_call_sync(server
->client
, &msg
, 0);
2064 update_changeattr(dir
, &res
.cinfo
);
2065 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2066 nfs_post_op_update_inode(inode
, res
.fattr
);
2072 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2074 struct nfs4_exception exception
= { };
2077 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2078 _nfs4_proc_link(inode
, dir
, name
),
2080 } while (exception
.retry
);
2084 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2085 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2087 struct nfs_server
*server
= NFS_SERVER(dir
);
2088 struct nfs_fh fhandle
;
2089 struct nfs_fattr fattr
, dir_fattr
;
2090 struct nfs4_create_arg arg
= {
2091 .dir_fh
= NFS_FH(dir
),
2093 .name
= &dentry
->d_name
,
2096 .bitmask
= server
->attr_bitmask
,
2098 struct nfs4_create_res res
= {
2102 .dir_fattr
= &dir_fattr
,
2104 struct rpc_message msg
= {
2105 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2111 if (len
> NFS4_MAXPATHLEN
)
2112 return -ENAMETOOLONG
;
2114 arg
.u
.symlink
.pages
= &page
;
2115 arg
.u
.symlink
.len
= len
;
2116 nfs_fattr_init(&fattr
);
2117 nfs_fattr_init(&dir_fattr
);
2119 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2121 update_changeattr(dir
, &res
.dir_cinfo
);
2122 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2123 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2128 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2129 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2131 struct nfs4_exception exception
= { };
2134 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2135 _nfs4_proc_symlink(dir
, dentry
, page
,
2138 } while (exception
.retry
);
2142 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2143 struct iattr
*sattr
)
2145 struct nfs_server
*server
= NFS_SERVER(dir
);
2146 struct nfs_fh fhandle
;
2147 struct nfs_fattr fattr
, dir_fattr
;
2148 struct nfs4_create_arg arg
= {
2149 .dir_fh
= NFS_FH(dir
),
2151 .name
= &dentry
->d_name
,
2154 .bitmask
= server
->attr_bitmask
,
2156 struct nfs4_create_res res
= {
2160 .dir_fattr
= &dir_fattr
,
2162 struct rpc_message msg
= {
2163 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2169 nfs_fattr_init(&fattr
);
2170 nfs_fattr_init(&dir_fattr
);
2172 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2174 update_changeattr(dir
, &res
.dir_cinfo
);
2175 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2176 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2181 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2182 struct iattr
*sattr
)
2184 struct nfs4_exception exception
= { };
2187 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2188 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2190 } while (exception
.retry
);
2194 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2195 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2197 struct inode
*dir
= dentry
->d_inode
;
2198 struct nfs4_readdir_arg args
= {
2203 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2205 struct nfs4_readdir_res res
;
2206 struct rpc_message msg
= {
2207 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2214 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2215 dentry
->d_parent
->d_name
.name
,
2216 dentry
->d_name
.name
,
2217 (unsigned long long)cookie
);
2218 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2219 res
.pgbase
= args
.pgbase
;
2220 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2222 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2223 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2227 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2228 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2230 struct nfs4_exception exception
= { };
2233 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2234 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2237 } while (exception
.retry
);
2241 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2242 struct iattr
*sattr
, dev_t rdev
)
2244 struct nfs_server
*server
= NFS_SERVER(dir
);
2246 struct nfs_fattr fattr
, dir_fattr
;
2247 struct nfs4_create_arg arg
= {
2248 .dir_fh
= NFS_FH(dir
),
2250 .name
= &dentry
->d_name
,
2252 .bitmask
= server
->attr_bitmask
,
2254 struct nfs4_create_res res
= {
2258 .dir_fattr
= &dir_fattr
,
2260 struct rpc_message msg
= {
2261 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2266 int mode
= sattr
->ia_mode
;
2268 nfs_fattr_init(&fattr
);
2269 nfs_fattr_init(&dir_fattr
);
2271 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2272 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2274 arg
.ftype
= NF4FIFO
;
2275 else if (S_ISBLK(mode
)) {
2277 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2278 arg
.u
.device
.specdata2
= MINOR(rdev
);
2280 else if (S_ISCHR(mode
)) {
2282 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2283 arg
.u
.device
.specdata2
= MINOR(rdev
);
2286 arg
.ftype
= NF4SOCK
;
2288 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2290 update_changeattr(dir
, &res
.dir_cinfo
);
2291 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2292 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2297 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2298 struct iattr
*sattr
, dev_t rdev
)
2300 struct nfs4_exception exception
= { };
2303 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2304 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2306 } while (exception
.retry
);
2310 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2311 struct nfs_fsstat
*fsstat
)
2313 struct nfs4_statfs_arg args
= {
2315 .bitmask
= server
->attr_bitmask
,
2317 struct rpc_message msg
= {
2318 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2323 nfs_fattr_init(fsstat
->fattr
);
2324 return rpc_call_sync(server
->client
, &msg
, 0);
2327 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2329 struct nfs4_exception exception
= { };
2332 err
= nfs4_handle_exception(server
,
2333 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2335 } while (exception
.retry
);
2339 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2340 struct nfs_fsinfo
*fsinfo
)
2342 struct nfs4_fsinfo_arg args
= {
2344 .bitmask
= server
->attr_bitmask
,
2346 struct rpc_message msg
= {
2347 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2352 return rpc_call_sync(server
->client
, &msg
, 0);
2355 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2357 struct nfs4_exception exception
= { };
2361 err
= nfs4_handle_exception(server
,
2362 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2364 } while (exception
.retry
);
2368 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2370 nfs_fattr_init(fsinfo
->fattr
);
2371 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2374 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2375 struct nfs_pathconf
*pathconf
)
2377 struct nfs4_pathconf_arg args
= {
2379 .bitmask
= server
->attr_bitmask
,
2381 struct rpc_message msg
= {
2382 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2384 .rpc_resp
= pathconf
,
2387 /* None of the pathconf attributes are mandatory to implement */
2388 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2389 memset(pathconf
, 0, sizeof(*pathconf
));
2393 nfs_fattr_init(pathconf
->fattr
);
2394 return rpc_call_sync(server
->client
, &msg
, 0);
2397 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2398 struct nfs_pathconf
*pathconf
)
2400 struct nfs4_exception exception
= { };
2404 err
= nfs4_handle_exception(server
,
2405 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2407 } while (exception
.retry
);
2411 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2413 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2415 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2416 rpc_restart_call(task
);
2419 if (task
->tk_status
> 0)
2420 renew_lease(server
, data
->timestamp
);
2424 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2426 struct rpc_message msg
= {
2427 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2428 .rpc_argp
= &data
->args
,
2429 .rpc_resp
= &data
->res
,
2430 .rpc_cred
= data
->cred
,
2433 data
->timestamp
= jiffies
;
2435 rpc_call_setup(&data
->task
, &msg
, 0);
2438 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2440 struct inode
*inode
= data
->inode
;
2442 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2443 rpc_restart_call(task
);
2446 if (task
->tk_status
>= 0) {
2447 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2448 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2453 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2455 struct rpc_message msg
= {
2456 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2457 .rpc_argp
= &data
->args
,
2458 .rpc_resp
= &data
->res
,
2459 .rpc_cred
= data
->cred
,
2461 struct inode
*inode
= data
->inode
;
2462 struct nfs_server
*server
= NFS_SERVER(inode
);
2465 if (how
& FLUSH_STABLE
) {
2466 if (!NFS_I(inode
)->ncommit
)
2467 stable
= NFS_FILE_SYNC
;
2469 stable
= NFS_DATA_SYNC
;
2471 stable
= NFS_UNSTABLE
;
2472 data
->args
.stable
= stable
;
2473 data
->args
.bitmask
= server
->attr_bitmask
;
2474 data
->res
.server
= server
;
2476 data
->timestamp
= jiffies
;
2478 /* Finalize the task. */
2479 rpc_call_setup(&data
->task
, &msg
, 0);
2482 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2484 struct inode
*inode
= data
->inode
;
2486 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2487 rpc_restart_call(task
);
2490 if (task
->tk_status
>= 0)
2491 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2495 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2497 struct rpc_message msg
= {
2498 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2499 .rpc_argp
= &data
->args
,
2500 .rpc_resp
= &data
->res
,
2501 .rpc_cred
= data
->cred
,
2503 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2505 data
->args
.bitmask
= server
->attr_bitmask
;
2506 data
->res
.server
= server
;
2508 rpc_call_setup(&data
->task
, &msg
, 0);
2512 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2513 * standalone procedure for queueing an asynchronous RENEW.
2515 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2517 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2518 unsigned long timestamp
= (unsigned long)data
;
2520 if (task
->tk_status
< 0) {
2521 switch (task
->tk_status
) {
2522 case -NFS4ERR_STALE_CLIENTID
:
2523 case -NFS4ERR_EXPIRED
:
2524 case -NFS4ERR_CB_PATH_DOWN
:
2525 nfs4_schedule_state_recovery(clp
);
2529 spin_lock(&clp
->cl_lock
);
2530 if (time_before(clp
->cl_last_renewal
,timestamp
))
2531 clp
->cl_last_renewal
= timestamp
;
2532 spin_unlock(&clp
->cl_lock
);
2535 static const struct rpc_call_ops nfs4_renew_ops
= {
2536 .rpc_call_done
= nfs4_renew_done
,
2539 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2541 struct rpc_message msg
= {
2542 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2547 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2548 &nfs4_renew_ops
, (void *)jiffies
);
2551 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2553 struct rpc_message msg
= {
2554 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2558 unsigned long now
= jiffies
;
2561 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2564 spin_lock(&clp
->cl_lock
);
2565 if (time_before(clp
->cl_last_renewal
,now
))
2566 clp
->cl_last_renewal
= now
;
2567 spin_unlock(&clp
->cl_lock
);
2571 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2573 return (server
->caps
& NFS_CAP_ACLS
)
2574 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2575 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2578 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2579 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2582 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2584 static void buf_to_pages(const void *buf
, size_t buflen
,
2585 struct page
**pages
, unsigned int *pgbase
)
2587 const void *p
= buf
;
2589 *pgbase
= offset_in_page(buf
);
2591 while (p
< buf
+ buflen
) {
2592 *(pages
++) = virt_to_page(p
);
2593 p
+= PAGE_CACHE_SIZE
;
2597 struct nfs4_cached_acl
{
2603 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2605 struct nfs_inode
*nfsi
= NFS_I(inode
);
2607 spin_lock(&inode
->i_lock
);
2608 kfree(nfsi
->nfs4_acl
);
2609 nfsi
->nfs4_acl
= acl
;
2610 spin_unlock(&inode
->i_lock
);
2613 static void nfs4_zap_acl_attr(struct inode
*inode
)
2615 nfs4_set_cached_acl(inode
, NULL
);
2618 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2620 struct nfs_inode
*nfsi
= NFS_I(inode
);
2621 struct nfs4_cached_acl
*acl
;
2624 spin_lock(&inode
->i_lock
);
2625 acl
= nfsi
->nfs4_acl
;
2628 if (buf
== NULL
) /* user is just asking for length */
2630 if (acl
->cached
== 0)
2632 ret
= -ERANGE
; /* see getxattr(2) man page */
2633 if (acl
->len
> buflen
)
2635 memcpy(buf
, acl
->data
, acl
->len
);
2639 spin_unlock(&inode
->i_lock
);
2643 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2645 struct nfs4_cached_acl
*acl
;
2647 if (buf
&& acl_len
<= PAGE_SIZE
) {
2648 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2652 memcpy(acl
->data
, buf
, acl_len
);
2654 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2661 nfs4_set_cached_acl(inode
, acl
);
2664 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2666 struct page
*pages
[NFS4ACL_MAXPAGES
];
2667 struct nfs_getaclargs args
= {
2668 .fh
= NFS_FH(inode
),
2672 size_t resp_len
= buflen
;
2674 struct rpc_message msg
= {
2675 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2677 .rpc_resp
= &resp_len
,
2679 struct page
*localpage
= NULL
;
2682 if (buflen
< PAGE_SIZE
) {
2683 /* As long as we're doing a round trip to the server anyway,
2684 * let's be prepared for a page of acl data. */
2685 localpage
= alloc_page(GFP_KERNEL
);
2686 resp_buf
= page_address(localpage
);
2687 if (localpage
== NULL
)
2689 args
.acl_pages
[0] = localpage
;
2690 args
.acl_pgbase
= 0;
2691 resp_len
= args
.acl_len
= PAGE_SIZE
;
2694 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2696 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2699 if (resp_len
> args
.acl_len
)
2700 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2702 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2705 if (resp_len
> buflen
)
2708 memcpy(buf
, resp_buf
, resp_len
);
2713 __free_page(localpage
);
2717 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2719 struct nfs4_exception exception
= { };
2722 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2725 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2726 } while (exception
.retry
);
2730 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2732 struct nfs_server
*server
= NFS_SERVER(inode
);
2735 if (!nfs4_server_supports_acls(server
))
2737 ret
= nfs_revalidate_inode(server
, inode
);
2740 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2743 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2746 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2748 struct nfs_server
*server
= NFS_SERVER(inode
);
2749 struct page
*pages
[NFS4ACL_MAXPAGES
];
2750 struct nfs_setaclargs arg
= {
2751 .fh
= NFS_FH(inode
),
2755 struct rpc_message msg
= {
2756 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2762 if (!nfs4_server_supports_acls(server
))
2764 nfs_inode_return_delegation(inode
);
2765 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2766 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2767 nfs_zap_caches(inode
);
2771 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2773 struct nfs4_exception exception
= { };
2776 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2777 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2779 } while (exception
.retry
);
2784 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2786 struct nfs_client
*clp
= server
->nfs_client
;
2788 if (!clp
|| task
->tk_status
>= 0)
2790 switch(task
->tk_status
) {
2791 case -NFS4ERR_STALE_CLIENTID
:
2792 case -NFS4ERR_STALE_STATEID
:
2793 case -NFS4ERR_EXPIRED
:
2794 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2795 nfs4_schedule_state_recovery(clp
);
2796 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2797 rpc_wake_up_task(task
);
2798 task
->tk_status
= 0;
2800 case -NFS4ERR_DELAY
:
2801 nfs_inc_server_stats((struct nfs_server
*) server
,
2803 case -NFS4ERR_GRACE
:
2804 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2805 task
->tk_status
= 0;
2807 case -NFS4ERR_OLD_STATEID
:
2808 task
->tk_status
= 0;
2811 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2815 static int nfs4_wait_bit_interruptible(void *word
)
2817 if (signal_pending(current
))
2818 return -ERESTARTSYS
;
2823 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2830 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2832 rpc_clnt_sigmask(clnt
, &oldset
);
2833 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2834 nfs4_wait_bit_interruptible
,
2835 TASK_INTERRUPTIBLE
);
2836 rpc_clnt_sigunmask(clnt
, &oldset
);
2838 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2842 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2850 *timeout
= NFS4_POLL_RETRY_MIN
;
2851 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2852 *timeout
= NFS4_POLL_RETRY_MAX
;
2853 rpc_clnt_sigmask(clnt
, &oldset
);
2854 if (clnt
->cl_intr
) {
2855 schedule_timeout_interruptible(*timeout
);
2859 schedule_timeout_uninterruptible(*timeout
);
2860 rpc_clnt_sigunmask(clnt
, &oldset
);
2865 /* This is the error handling routine for processes that are allowed
2868 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2870 struct nfs_client
*clp
= server
->nfs_client
;
2871 int ret
= errorcode
;
2873 exception
->retry
= 0;
2877 case -NFS4ERR_STALE_CLIENTID
:
2878 case -NFS4ERR_STALE_STATEID
:
2879 case -NFS4ERR_EXPIRED
:
2880 nfs4_schedule_state_recovery(clp
);
2881 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2883 exception
->retry
= 1;
2885 case -NFS4ERR_FILE_OPEN
:
2886 case -NFS4ERR_GRACE
:
2887 case -NFS4ERR_DELAY
:
2888 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2891 case -NFS4ERR_OLD_STATEID
:
2892 exception
->retry
= 1;
2894 /* We failed to handle the error */
2895 return nfs4_map_errors(ret
);
2898 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2900 nfs4_verifier sc_verifier
;
2901 struct nfs4_setclientid setclientid
= {
2902 .sc_verifier
= &sc_verifier
,
2905 struct rpc_message msg
= {
2906 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2907 .rpc_argp
= &setclientid
,
2915 p
= (__be32
*)sc_verifier
.data
;
2916 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2917 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2920 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2921 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2922 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2923 cred
->cr_ops
->cr_name
,
2924 clp
->cl_id_uniquifier
);
2925 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2926 sizeof(setclientid
.sc_netid
), "tcp");
2927 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2928 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2929 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2931 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2932 if (status
!= -NFS4ERR_CLID_INUSE
)
2937 ssleep(clp
->cl_lease_time
+ 1);
2939 if (++clp
->cl_id_uniquifier
== 0)
2945 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2947 struct nfs_fsinfo fsinfo
;
2948 struct rpc_message msg
= {
2949 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2951 .rpc_resp
= &fsinfo
,
2958 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2960 spin_lock(&clp
->cl_lock
);
2961 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2962 clp
->cl_last_renewal
= now
;
2963 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2964 spin_unlock(&clp
->cl_lock
);
2969 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2974 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2978 case -NFS4ERR_RESOURCE
:
2979 /* The IBM lawyers misread another document! */
2980 case -NFS4ERR_DELAY
:
2981 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2987 struct nfs4_delegreturndata
{
2988 struct nfs4_delegreturnargs args
;
2989 struct nfs4_delegreturnres res
;
2991 nfs4_stateid stateid
;
2992 struct rpc_cred
*cred
;
2993 unsigned long timestamp
;
2994 struct nfs_fattr fattr
;
2998 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3000 struct nfs4_delegreturndata
*data
= calldata
;
3001 struct rpc_message msg
= {
3002 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3003 .rpc_argp
= &data
->args
,
3004 .rpc_resp
= &data
->res
,
3005 .rpc_cred
= data
->cred
,
3007 nfs_fattr_init(data
->res
.fattr
);
3008 rpc_call_setup(task
, &msg
, 0);
3011 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3013 struct nfs4_delegreturndata
*data
= calldata
;
3014 data
->rpc_status
= task
->tk_status
;
3015 if (data
->rpc_status
== 0)
3016 renew_lease(data
->res
.server
, data
->timestamp
);
3019 static void nfs4_delegreturn_release(void *calldata
)
3021 struct nfs4_delegreturndata
*data
= calldata
;
3023 put_rpccred(data
->cred
);
3027 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3028 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3029 .rpc_call_done
= nfs4_delegreturn_done
,
3030 .rpc_release
= nfs4_delegreturn_release
,
3033 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3035 struct nfs4_delegreturndata
*data
;
3036 struct nfs_server
*server
= NFS_SERVER(inode
);
3037 struct rpc_task
*task
;
3040 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3043 data
->args
.fhandle
= &data
->fh
;
3044 data
->args
.stateid
= &data
->stateid
;
3045 data
->args
.bitmask
= server
->attr_bitmask
;
3046 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3047 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3048 data
->res
.fattr
= &data
->fattr
;
3049 data
->res
.server
= server
;
3050 data
->cred
= get_rpccred(cred
);
3051 data
->timestamp
= jiffies
;
3052 data
->rpc_status
= 0;
3054 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3056 return PTR_ERR(task
);
3057 status
= nfs4_wait_for_completion_rpc_task(task
);
3059 status
= data
->rpc_status
;
3061 nfs_post_op_update_inode(inode
, &data
->fattr
);
3067 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3069 struct nfs_server
*server
= NFS_SERVER(inode
);
3070 struct nfs4_exception exception
= { };
3073 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3075 case -NFS4ERR_STALE_STATEID
:
3076 case -NFS4ERR_EXPIRED
:
3080 err
= nfs4_handle_exception(server
, err
, &exception
);
3081 } while (exception
.retry
);
3085 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3086 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3089 * sleep, with exponential backoff, and retry the LOCK operation.
3091 static unsigned long
3092 nfs4_set_lock_task_retry(unsigned long timeout
)
3094 schedule_timeout_interruptible(timeout
);
3096 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3097 return NFS4_LOCK_MAXTIMEOUT
;
3101 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3103 struct inode
*inode
= state
->inode
;
3104 struct nfs_server
*server
= NFS_SERVER(inode
);
3105 struct nfs_client
*clp
= server
->nfs_client
;
3106 struct nfs_lockt_args arg
= {
3107 .fh
= NFS_FH(inode
),
3110 struct nfs_lockt_res res
= {
3113 struct rpc_message msg
= {
3114 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3117 .rpc_cred
= state
->owner
->so_cred
,
3119 struct nfs4_lock_state
*lsp
;
3122 down_read(&clp
->cl_sem
);
3123 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3124 status
= nfs4_set_lock_state(state
, request
);
3127 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3128 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3129 status
= rpc_call_sync(server
->client
, &msg
, 0);
3132 request
->fl_type
= F_UNLCK
;
3134 case -NFS4ERR_DENIED
:
3137 request
->fl_ops
->fl_release_private(request
);
3139 up_read(&clp
->cl_sem
);
3143 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3145 struct nfs4_exception exception
= { };
3149 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3150 _nfs4_proc_getlk(state
, cmd
, request
),
3152 } while (exception
.retry
);
3156 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3159 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3161 res
= posix_lock_file_wait(file
, fl
);
3164 res
= flock_lock_file_wait(file
, fl
);
3172 struct nfs4_unlockdata
{
3173 struct nfs_locku_args arg
;
3174 struct nfs_locku_res res
;
3175 struct nfs4_lock_state
*lsp
;
3176 struct nfs_open_context
*ctx
;
3177 struct file_lock fl
;
3178 const struct nfs_server
*server
;
3179 unsigned long timestamp
;
3182 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3183 struct nfs_open_context
*ctx
,
3184 struct nfs4_lock_state
*lsp
,
3185 struct nfs_seqid
*seqid
)
3187 struct nfs4_unlockdata
*p
;
3188 struct inode
*inode
= lsp
->ls_state
->inode
;
3190 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3193 p
->arg
.fh
= NFS_FH(inode
);
3195 p
->arg
.seqid
= seqid
;
3196 p
->arg
.stateid
= &lsp
->ls_stateid
;
3198 atomic_inc(&lsp
->ls_count
);
3199 /* Ensure we don't close file until we're done freeing locks! */
3200 p
->ctx
= get_nfs_open_context(ctx
);
3201 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3202 p
->server
= NFS_SERVER(inode
);
3206 static void nfs4_locku_release_calldata(void *data
)
3208 struct nfs4_unlockdata
*calldata
= data
;
3209 nfs_free_seqid(calldata
->arg
.seqid
);
3210 nfs4_put_lock_state(calldata
->lsp
);
3211 put_nfs_open_context(calldata
->ctx
);
3215 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3217 struct nfs4_unlockdata
*calldata
= data
;
3219 if (RPC_ASSASSINATED(task
))
3221 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3222 switch (task
->tk_status
) {
3224 memcpy(calldata
->lsp
->ls_stateid
.data
,
3225 calldata
->res
.stateid
.data
,
3226 sizeof(calldata
->lsp
->ls_stateid
.data
));
3227 renew_lease(calldata
->server
, calldata
->timestamp
);
3229 case -NFS4ERR_STALE_STATEID
:
3230 case -NFS4ERR_EXPIRED
:
3233 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3234 rpc_restart_call(task
);
3238 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3240 struct nfs4_unlockdata
*calldata
= data
;
3241 struct rpc_message msg
= {
3242 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3243 .rpc_argp
= &calldata
->arg
,
3244 .rpc_resp
= &calldata
->res
,
3245 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3248 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3250 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3251 /* Note: exit _without_ running nfs4_locku_done */
3252 task
->tk_action
= NULL
;
3255 calldata
->timestamp
= jiffies
;
3256 rpc_call_setup(task
, &msg
, 0);
3259 static const struct rpc_call_ops nfs4_locku_ops
= {
3260 .rpc_call_prepare
= nfs4_locku_prepare
,
3261 .rpc_call_done
= nfs4_locku_done
,
3262 .rpc_release
= nfs4_locku_release_calldata
,
3265 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3266 struct nfs_open_context
*ctx
,
3267 struct nfs4_lock_state
*lsp
,
3268 struct nfs_seqid
*seqid
)
3270 struct nfs4_unlockdata
*data
;
3272 /* Ensure this is an unlock - when canceling a lock, the
3273 * canceled lock is passed in, and it won't be an unlock.
3275 fl
->fl_type
= F_UNLCK
;
3277 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3279 nfs_free_seqid(seqid
);
3280 return ERR_PTR(-ENOMEM
);
3283 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3286 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3288 struct nfs_seqid
*seqid
;
3289 struct nfs4_lock_state
*lsp
;
3290 struct rpc_task
*task
;
3293 status
= nfs4_set_lock_state(state
, request
);
3294 /* Unlock _before_ we do the RPC call */
3295 request
->fl_flags
|= FL_EXISTS
;
3296 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3300 /* Is this a delegated lock? */
3301 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3303 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3304 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3308 task
= nfs4_do_unlck(request
, request
->fl_file
->private_data
, lsp
, seqid
);
3309 status
= PTR_ERR(task
);
3312 status
= nfs4_wait_for_completion_rpc_task(task
);
3318 struct nfs4_lockdata
{
3319 struct nfs_lock_args arg
;
3320 struct nfs_lock_res res
;
3321 struct nfs4_lock_state
*lsp
;
3322 struct nfs_open_context
*ctx
;
3323 struct file_lock fl
;
3324 unsigned long timestamp
;
3329 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3330 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3332 struct nfs4_lockdata
*p
;
3333 struct inode
*inode
= lsp
->ls_state
->inode
;
3334 struct nfs_server
*server
= NFS_SERVER(inode
);
3336 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3340 p
->arg
.fh
= NFS_FH(inode
);
3342 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3343 if (p
->arg
.lock_seqid
== NULL
)
3345 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3346 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3347 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3349 atomic_inc(&lsp
->ls_count
);
3350 p
->ctx
= get_nfs_open_context(ctx
);
3351 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3358 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3360 struct nfs4_lockdata
*data
= calldata
;
3361 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3362 struct nfs4_state_owner
*sp
= state
->owner
;
3363 struct rpc_message msg
= {
3364 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3365 .rpc_argp
= &data
->arg
,
3366 .rpc_resp
= &data
->res
,
3367 .rpc_cred
= sp
->so_cred
,
3370 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3372 dprintk("%s: begin!\n", __FUNCTION__
);
3373 /* Do we need to do an open_to_lock_owner? */
3374 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3375 data
->arg
.open_seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
3376 if (data
->arg
.open_seqid
== NULL
) {
3377 data
->rpc_status
= -ENOMEM
;
3378 task
->tk_action
= NULL
;
3381 data
->arg
.open_stateid
= &state
->stateid
;
3382 data
->arg
.new_lock_owner
= 1;
3384 data
->timestamp
= jiffies
;
3385 rpc_call_setup(task
, &msg
, 0);
3387 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3390 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3392 struct nfs4_lockdata
*data
= calldata
;
3394 dprintk("%s: begin!\n", __FUNCTION__
);
3396 data
->rpc_status
= task
->tk_status
;
3397 if (RPC_ASSASSINATED(task
))
3399 if (data
->arg
.new_lock_owner
!= 0) {
3400 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3401 if (data
->rpc_status
== 0)
3402 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3406 if (data
->rpc_status
== 0) {
3407 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3408 sizeof(data
->lsp
->ls_stateid
.data
));
3409 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3410 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3412 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3414 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3417 static void nfs4_lock_release(void *calldata
)
3419 struct nfs4_lockdata
*data
= calldata
;
3421 dprintk("%s: begin!\n", __FUNCTION__
);
3422 if (data
->arg
.open_seqid
!= NULL
)
3423 nfs_free_seqid(data
->arg
.open_seqid
);
3424 if (data
->cancelled
!= 0) {
3425 struct rpc_task
*task
;
3426 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3427 data
->arg
.lock_seqid
);
3430 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3432 nfs_free_seqid(data
->arg
.lock_seqid
);
3433 nfs4_put_lock_state(data
->lsp
);
3434 put_nfs_open_context(data
->ctx
);
3436 dprintk("%s: done!\n", __FUNCTION__
);
3439 static const struct rpc_call_ops nfs4_lock_ops
= {
3440 .rpc_call_prepare
= nfs4_lock_prepare
,
3441 .rpc_call_done
= nfs4_lock_done
,
3442 .rpc_release
= nfs4_lock_release
,
3445 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3447 struct nfs4_lockdata
*data
;
3448 struct rpc_task
*task
;
3451 dprintk("%s: begin!\n", __FUNCTION__
);
3452 data
= nfs4_alloc_lockdata(fl
, fl
->fl_file
->private_data
,
3453 fl
->fl_u
.nfs4_fl
.owner
);
3457 data
->arg
.block
= 1;
3459 data
->arg
.reclaim
= 1;
3460 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3461 &nfs4_lock_ops
, data
);
3463 return PTR_ERR(task
);
3464 ret
= nfs4_wait_for_completion_rpc_task(task
);
3466 ret
= data
->rpc_status
;
3467 if (ret
== -NFS4ERR_DENIED
)
3470 data
->cancelled
= 1;
3472 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3476 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3478 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3479 struct nfs4_exception exception
= { };
3483 /* Cache the lock if possible... */
3484 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3486 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3487 if (err
!= -NFS4ERR_DELAY
)
3489 nfs4_handle_exception(server
, err
, &exception
);
3490 } while (exception
.retry
);
3494 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3496 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3497 struct nfs4_exception exception
= { };
3500 err
= nfs4_set_lock_state(state
, request
);
3504 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3506 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3507 if (err
!= -NFS4ERR_DELAY
)
3509 nfs4_handle_exception(server
, err
, &exception
);
3510 } while (exception
.retry
);
3514 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3516 struct nfs_client
*clp
= state
->owner
->so_client
;
3517 unsigned char fl_flags
= request
->fl_flags
;
3520 /* Is this a delegated open? */
3521 status
= nfs4_set_lock_state(state
, request
);
3524 request
->fl_flags
|= FL_ACCESS
;
3525 status
= do_vfs_lock(request
->fl_file
, request
);
3528 down_read(&clp
->cl_sem
);
3529 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3530 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3531 /* Yes: cache locks! */
3532 down_read(&nfsi
->rwsem
);
3533 /* ...but avoid races with delegation recall... */
3534 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3535 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3536 status
= do_vfs_lock(request
->fl_file
, request
);
3537 up_read(&nfsi
->rwsem
);
3540 up_read(&nfsi
->rwsem
);
3542 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3545 /* Note: we always want to sleep here! */
3546 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3547 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3548 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3550 up_read(&clp
->cl_sem
);
3552 request
->fl_flags
= fl_flags
;
3556 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3558 struct nfs4_exception exception
= { };
3562 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3563 _nfs4_proc_setlk(state
, cmd
, request
),
3565 } while (exception
.retry
);
3570 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3572 struct nfs_open_context
*ctx
;
3573 struct nfs4_state
*state
;
3574 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3577 /* verify open state */
3578 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3581 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3585 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3587 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3590 if (request
->fl_type
== F_UNLCK
)
3591 return nfs4_proc_unlck(state
, cmd
, request
);
3594 status
= nfs4_proc_setlk(state
, cmd
, request
);
3595 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3597 timeout
= nfs4_set_lock_task_retry(timeout
);
3598 status
= -ERESTARTSYS
;
3601 } while(status
< 0);
3605 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3607 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3608 struct nfs4_exception exception
= { };
3611 err
= nfs4_set_lock_state(state
, fl
);
3615 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3616 if (err
!= -NFS4ERR_DELAY
)
3618 err
= nfs4_handle_exception(server
, err
, &exception
);
3619 } while (exception
.retry
);
3624 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3626 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3627 size_t buflen
, int flags
)
3629 struct inode
*inode
= dentry
->d_inode
;
3631 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3634 if (!S_ISREG(inode
->i_mode
) &&
3635 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3638 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3641 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3642 * and that's what we'll do for e.g. user attributes that haven't been set.
3643 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3644 * attributes in kernel-managed attribute namespaces. */
3645 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3648 struct inode
*inode
= dentry
->d_inode
;
3650 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3653 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3656 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3658 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3660 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3662 if (buf
&& buflen
< len
)
3665 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3669 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3670 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3672 struct nfs_server
*server
= NFS_SERVER(dir
);
3674 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3675 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3677 struct nfs4_fs_locations_arg args
= {
3678 .dir_fh
= NFS_FH(dir
),
3683 struct rpc_message msg
= {
3684 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3686 .rpc_resp
= fs_locations
,
3690 dprintk("%s: start\n", __FUNCTION__
);
3691 nfs_fattr_init(&fs_locations
->fattr
);
3692 fs_locations
->server
= server
;
3693 fs_locations
->nlocations
= 0;
3694 status
= rpc_call_sync(server
->client
, &msg
, 0);
3695 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3699 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3700 .recover_open
= nfs4_open_reclaim
,
3701 .recover_lock
= nfs4_lock_reclaim
,
3704 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3705 .recover_open
= nfs4_open_expired
,
3706 .recover_lock
= nfs4_lock_expired
,
3709 static const struct inode_operations nfs4_file_inode_operations
= {
3710 .permission
= nfs_permission
,
3711 .getattr
= nfs_getattr
,
3712 .setattr
= nfs_setattr
,
3713 .getxattr
= nfs4_getxattr
,
3714 .setxattr
= nfs4_setxattr
,
3715 .listxattr
= nfs4_listxattr
,
3718 const struct nfs_rpc_ops nfs_v4_clientops
= {
3719 .version
= 4, /* protocol version */
3720 .dentry_ops
= &nfs4_dentry_operations
,
3721 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3722 .file_inode_ops
= &nfs4_file_inode_operations
,
3723 .getroot
= nfs4_proc_get_root
,
3724 .getattr
= nfs4_proc_getattr
,
3725 .setattr
= nfs4_proc_setattr
,
3726 .lookupfh
= nfs4_proc_lookupfh
,
3727 .lookup
= nfs4_proc_lookup
,
3728 .access
= nfs4_proc_access
,
3729 .readlink
= nfs4_proc_readlink
,
3730 .create
= nfs4_proc_create
,
3731 .remove
= nfs4_proc_remove
,
3732 .unlink_setup
= nfs4_proc_unlink_setup
,
3733 .unlink_done
= nfs4_proc_unlink_done
,
3734 .rename
= nfs4_proc_rename
,
3735 .link
= nfs4_proc_link
,
3736 .symlink
= nfs4_proc_symlink
,
3737 .mkdir
= nfs4_proc_mkdir
,
3738 .rmdir
= nfs4_proc_remove
,
3739 .readdir
= nfs4_proc_readdir
,
3740 .mknod
= nfs4_proc_mknod
,
3741 .statfs
= nfs4_proc_statfs
,
3742 .fsinfo
= nfs4_proc_fsinfo
,
3743 .pathconf
= nfs4_proc_pathconf
,
3744 .set_capabilities
= nfs4_server_capabilities
,
3745 .decode_dirent
= nfs4_decode_dirent
,
3746 .read_setup
= nfs4_proc_read_setup
,
3747 .read_done
= nfs4_read_done
,
3748 .write_setup
= nfs4_proc_write_setup
,
3749 .write_done
= nfs4_write_done
,
3750 .commit_setup
= nfs4_proc_commit_setup
,
3751 .commit_done
= nfs4_commit_done
,
3752 .file_open
= nfs_open
,
3753 .file_release
= nfs_release
,
3754 .lock
= nfs4_proc_lock
,
3755 .clear_acl_cache
= nfs4_zap_acl_attr
,