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2d864651
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体验新版 GitCode,发现更多精彩内容 >>
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2d864651
编写于
9月 08, 2013
作者:
A
Al Viro
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
introduce kern_path_mountpoint()
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
197df04c
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
25 addition
and
11 deletion
+25
-11
fs/namei.c
fs/namei.c
+24
-11
include/linux/namei.h
include/linux/namei.h
+1
-0
未找到文件。
fs/namei.c
浏览文件 @
2d864651
...
...
@@ -2360,6 +2360,20 @@ path_mountpoint(int dfd, const char *name, struct path *path, unsigned int flags
return
err
;
}
static
int
filename_mountpoint
(
int
dfd
,
struct
filename
*
s
,
struct
path
*
path
,
unsigned
int
flags
)
{
int
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
|
LOOKUP_RCU
);
if
(
unlikely
(
error
==
-
ECHILD
))
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
);
if
(
unlikely
(
error
==
-
ESTALE
))
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
|
LOOKUP_REVAL
);
if
(
likely
(
!
error
))
audit_inode
(
s
,
path
->
dentry
,
0
);
return
error
;
}
/**
* user_path_mountpoint_at - lookup a path from userland in order to umount it
* @dfd: directory file descriptor
...
...
@@ -2380,23 +2394,22 @@ user_path_mountpoint_at(int dfd, const char __user *name, unsigned int flags,
{
struct
filename
*
s
=
getname
(
name
);
int
error
;
if
(
IS_ERR
(
s
))
return
PTR_ERR
(
s
);
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
|
LOOKUP_RCU
);
if
(
unlikely
(
error
==
-
ECHILD
))
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
);
if
(
unlikely
(
error
==
-
ESTALE
))
error
=
path_mountpoint
(
dfd
,
s
->
name
,
path
,
flags
|
LOOKUP_REVAL
);
if
(
likely
(
!
error
))
audit_inode
(
s
,
path
->
dentry
,
0
);
error
=
filename_mountpoint
(
dfd
,
s
,
path
,
flags
);
putname
(
s
);
return
error
;
}
int
kern_path_mountpoint
(
int
dfd
,
const
char
*
name
,
struct
path
*
path
,
unsigned
int
flags
)
{
struct
filename
s
=
{.
name
=
name
};
return
filename_mountpoint
(
dfd
,
&
s
,
path
,
flags
);
}
EXPORT_SYMBOL
(
kern_path_mountpoint
);
/*
* It's inline, so penalty for filesystems that don't use sticky bit is
* minimal.
...
...
include/linux/namei.h
浏览文件 @
2d864651
...
...
@@ -70,6 +70,7 @@ extern struct dentry *kern_path_create(int, const char *, struct path *, unsigne
extern
struct
dentry
*
user_path_create
(
int
,
const
char
__user
*
,
struct
path
*
,
unsigned
int
);
extern
void
done_path_create
(
struct
path
*
,
struct
dentry
*
);
extern
struct
dentry
*
kern_path_locked
(
const
char
*
,
struct
path
*
);
extern
int
kern_path_mountpoint
(
int
,
const
char
*
,
struct
path
*
,
unsigned
int
);
extern
struct
dentry
*
lookup_one_len
(
const
char
*
,
struct
dentry
*
,
int
);
...
...
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