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48bc06e7
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48bc06e7
编写于
9月 16, 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
befs: split symlink iops in two - for short and long symlinks resp.
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
87dc800b
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
31 addition
and
30 deletion
+31
-30
fs/befs/linuxvfs.c
fs/befs/linuxvfs.c
+31
-30
未找到文件。
fs/befs/linuxvfs.c
浏览文件 @
48bc06e7
...
@@ -42,7 +42,7 @@ static void befs_destroy_inode(struct inode *inode);
...
@@ -42,7 +42,7 @@ static void befs_destroy_inode(struct inode *inode);
static
int
befs_init_inodecache
(
void
);
static
int
befs_init_inodecache
(
void
);
static
void
befs_destroy_inodecache
(
void
);
static
void
befs_destroy_inodecache
(
void
);
static
void
*
befs_follow_link
(
struct
dentry
*
,
struct
nameidata
*
);
static
void
*
befs_follow_link
(
struct
dentry
*
,
struct
nameidata
*
);
static
void
befs_put_link
(
struct
dentry
*
,
struct
nameidata
*
,
void
*
);
static
void
*
befs_fast_follow_link
(
struct
dentry
*
,
struct
nameidata
*
);
static
int
befs_utf2nls
(
struct
super_block
*
sb
,
const
char
*
in
,
int
in_len
,
static
int
befs_utf2nls
(
struct
super_block
*
sb
,
const
char
*
in
,
int
in_len
,
char
**
out
,
int
*
out_len
);
char
**
out
,
int
*
out_len
);
static
int
befs_nls2utf
(
struct
super_block
*
sb
,
const
char
*
in
,
int
in_len
,
static
int
befs_nls2utf
(
struct
super_block
*
sb
,
const
char
*
in
,
int
in_len
,
...
@@ -79,10 +79,15 @@ static const struct address_space_operations befs_aops = {
...
@@ -79,10 +79,15 @@ static const struct address_space_operations befs_aops = {
.
bmap
=
befs_bmap
,
.
bmap
=
befs_bmap
,
};
};
static
const
struct
inode_operations
befs_fast_symlink_inode_operations
=
{
.
readlink
=
generic_readlink
,
.
follow_link
=
befs_fast_follow_link
,
};
static
const
struct
inode_operations
befs_symlink_inode_operations
=
{
static
const
struct
inode_operations
befs_symlink_inode_operations
=
{
.
readlink
=
generic_readlink
,
.
readlink
=
generic_readlink
,
.
follow_link
=
befs_follow_link
,
.
follow_link
=
befs_follow_link
,
.
put_link
=
befs
_put_link
,
.
put_link
=
kfree
_put_link
,
};
};
/*
/*
...
@@ -411,7 +416,10 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
...
@@ -411,7 +416,10 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
inode
->
i_op
=
&
befs_dir_inode_operations
;
inode
->
i_op
=
&
befs_dir_inode_operations
;
inode
->
i_fop
=
&
befs_dir_operations
;
inode
->
i_fop
=
&
befs_dir_operations
;
}
else
if
(
S_ISLNK
(
inode
->
i_mode
))
{
}
else
if
(
S_ISLNK
(
inode
->
i_mode
))
{
inode
->
i_op
=
&
befs_symlink_inode_operations
;
if
(
befs_ino
->
i_flags
&
BEFS_LONG_SYMLINK
)
inode
->
i_op
=
&
befs_symlink_inode_operations
;
else
inode
->
i_op
=
&
befs_fast_symlink_inode_operations
;
}
else
{
}
else
{
befs_error
(
sb
,
"Inode %lu is not a regular file, "
befs_error
(
sb
,
"Inode %lu is not a regular file, "
"directory or symlink. THAT IS WRONG! BeFS has no "
"directory or symlink. THAT IS WRONG! BeFS has no "
...
@@ -477,47 +485,40 @@ befs_destroy_inodecache(void)
...
@@ -477,47 +485,40 @@ befs_destroy_inodecache(void)
static
void
*
static
void
*
befs_follow_link
(
struct
dentry
*
dentry
,
struct
nameidata
*
nd
)
befs_follow_link
(
struct
dentry
*
dentry
,
struct
nameidata
*
nd
)
{
{
struct
super_block
*
sb
=
dentry
->
d_sb
;
befs_inode_info
*
befs_ino
=
BEFS_I
(
dentry
->
d_inode
);
befs_inode_info
*
befs_ino
=
BEFS_I
(
dentry
->
d_inode
);
befs_data_stream
*
data
=
&
befs_ino
->
i_data
.
ds
;
befs_off_t
len
=
data
->
size
;
char
*
link
;
char
*
link
;
if
(
befs_ino
->
i_flags
&
BEFS_LONG_SYMLINK
)
{
if
(
len
==
0
)
{
struct
super_block
*
sb
=
dentry
->
d_sb
;
befs_error
(
sb
,
"Long symlink with illegal length"
);
befs_data_stream
*
data
=
&
befs_ino
->
i_data
.
ds
;
link
=
ERR_PTR
(
-
EIO
);
befs_off_t
len
=
data
->
size
;
}
else
{
befs_debug
(
sb
,
"Follow long symlink"
);
if
(
len
==
0
)
{
link
=
kmalloc
(
len
,
GFP_NOFS
);
befs_error
(
sb
,
"Long symlink with illegal length"
);
if
(
!
link
)
{
link
=
ERR_PTR
(
-
ENOMEM
);
}
else
if
(
befs_read_lsymlink
(
sb
,
data
,
link
,
len
)
!=
len
)
{
kfree
(
link
);
befs_error
(
sb
,
"Failed to read entire long symlink"
);
link
=
ERR_PTR
(
-
EIO
);
link
=
ERR_PTR
(
-
EIO
);
}
else
{
}
else
{
befs_debug
(
sb
,
"Follow long symlink"
);
link
[
len
-
1
]
=
'\0'
;
link
=
kmalloc
(
len
,
GFP_NOFS
);
if
(
!
link
)
{
link
=
ERR_PTR
(
-
ENOMEM
);
}
else
if
(
befs_read_lsymlink
(
sb
,
data
,
link
,
len
)
!=
len
)
{
kfree
(
link
);
befs_error
(
sb
,
"Failed to read entire long symlink"
);
link
=
ERR_PTR
(
-
EIO
);
}
else
{
link
[
len
-
1
]
=
'\0'
;
}
}
}
}
else
{
link
=
befs_ino
->
i_data
.
symlink
;
}
}
nd_set_link
(
nd
,
link
);
nd_set_link
(
nd
,
link
);
return
NULL
;
return
NULL
;
}
}
static
void
befs_put_link
(
struct
dentry
*
dentry
,
struct
nameidata
*
nd
,
void
*
p
)
static
void
*
befs_fast_follow_link
(
struct
dentry
*
dentry
,
struct
nameidata
*
nd
)
{
{
befs_inode_info
*
befs_ino
=
BEFS_I
(
dentry
->
d_inode
);
befs_inode_info
*
befs_ino
=
BEFS_I
(
dentry
->
d_inode
);
if
(
befs_ino
->
i_flags
&
BEFS_LONG_SYMLINK
)
{
nd_set_link
(
nd
,
befs_ino
->
i_data
.
symlink
);
char
*
link
=
nd_get_link
(
nd
);
return
NULL
;
if
(
!
IS_ERR
(
link
))
kfree
(
link
);
}
}
}
/*
/*
...
...
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