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Kirill Smelkov
linux
Commits
04ffdbe2
Commit
04ffdbe2
authored
Apr 16, 2010
by
Trond Myklebust
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NFS: Reduce the stack footprint of nfs_follow_remote_path()
Signed-off-by:
Trond Myklebust
<
Trond.Myklebust@netapp.com
>
parent
e1fb4d05
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6 deletions
+12
-6
fs/nfs/super.c
fs/nfs/super.c
+12
-6
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fs/nfs/super.c
View file @
04ffdbe2
...
...
@@ -2672,38 +2672,44 @@ static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt)
static
int
nfs_follow_remote_path
(
struct
vfsmount
*
root_mnt
,
const
char
*
export_path
,
struct
vfsmount
*
mnt_target
)
{
struct
nameidata
*
nd
=
NULL
;
struct
mnt_namespace
*
ns_private
;
struct
nameidata
nd
;
struct
super_block
*
s
;
int
ret
;
nd
=
kmalloc
(
sizeof
(
*
nd
),
GFP_KERNEL
);
if
(
nd
==
NULL
)
return
-
ENOMEM
;
ns_private
=
create_mnt_ns
(
root_mnt
);
ret
=
PTR_ERR
(
ns_private
);
if
(
IS_ERR
(
ns_private
))
goto
out_mntput
;
ret
=
vfs_path_lookup
(
root_mnt
->
mnt_root
,
root_mnt
,
export_path
,
LOOKUP_FOLLOW
,
&
nd
);
export_path
,
LOOKUP_FOLLOW
,
nd
);
put_mnt_ns
(
ns_private
);
if
(
ret
!=
0
)
goto
out_err
;
s
=
nd
.
path
.
mnt
->
mnt_sb
;
s
=
nd
->
path
.
mnt
->
mnt_sb
;
atomic_inc
(
&
s
->
s_active
);
mnt_target
->
mnt_sb
=
s
;
mnt_target
->
mnt_root
=
dget
(
nd
.
path
.
dentry
);
mnt_target
->
mnt_root
=
dget
(
nd
->
path
.
dentry
);
/* Correct the device pathname */
nfs_fix_devname
(
&
nd
.
path
,
mnt_target
);
nfs_fix_devname
(
&
nd
->
path
,
mnt_target
);
path_put
(
&
nd
.
path
);
path_put
(
&
nd
->
path
);
kfree
(
nd
);
down_write
(
&
s
->
s_umount
);
return
0
;
out_mntput:
mntput
(
root_mnt
);
out_err:
kfree
(
nd
);
return
ret
;
}
...
...
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