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493c84c0
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493c84c0
编写于
9年前
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
new helper: __vfs_write()
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
c48722c6
无相关合并请求
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
17 addition
and
12 deletion
+17
-12
fs/read_write.c
fs/read_write.c
+16
-12
include/linux/fs.h
include/linux/fs.h
+1
-0
未找到文件。
fs/read_write.c
浏览文件 @
493c84c0
...
...
@@ -527,6 +527,20 @@ ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, lo
EXPORT_SYMBOL
(
new_sync_write
);
ssize_t
__vfs_write
(
struct
file
*
file
,
const
char
__user
*
p
,
size_t
count
,
loff_t
*
pos
)
{
if
(
file
->
f_op
->
write
)
return
file
->
f_op
->
write
(
file
,
p
,
count
,
pos
);
else
if
(
file
->
f_op
->
aio_write
)
return
do_sync_write
(
file
,
p
,
count
,
pos
);
else
if
(
file
->
f_op
->
write_iter
)
return
new_sync_write
(
file
,
p
,
count
,
pos
);
else
return
-
EINVAL
;
}
EXPORT_SYMBOL
(
__vfs_write
);
ssize_t
__kernel_write
(
struct
file
*
file
,
const
char
*
buf
,
size_t
count
,
loff_t
*
pos
)
{
mm_segment_t
old_fs
;
...
...
@@ -541,12 +555,7 @@ ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t
p
=
(
__force
const
char
__user
*
)
buf
;
if
(
count
>
MAX_RW_COUNT
)
count
=
MAX_RW_COUNT
;
if
(
file
->
f_op
->
write
)
ret
=
file
->
f_op
->
write
(
file
,
p
,
count
,
pos
);
else
if
(
file
->
f_op
->
aio_write
)
ret
=
do_sync_write
(
file
,
p
,
count
,
pos
);
else
ret
=
new_sync_write
(
file
,
p
,
count
,
pos
);
ret
=
__vfs_write
(
file
,
p
,
count
,
pos
);
set_fs
(
old_fs
);
if
(
ret
>
0
)
{
fsnotify_modify
(
file
);
...
...
@@ -573,12 +582,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
if
(
ret
>=
0
)
{
count
=
ret
;
file_start_write
(
file
);
if
(
file
->
f_op
->
write
)
ret
=
file
->
f_op
->
write
(
file
,
buf
,
count
,
pos
);
else
if
(
file
->
f_op
->
aio_write
)
ret
=
do_sync_write
(
file
,
buf
,
count
,
pos
);
else
ret
=
new_sync_write
(
file
,
buf
,
count
,
pos
);
ret
=
__vfs_write
(
file
,
buf
,
count
,
pos
);
if
(
ret
>
0
)
{
fsnotify_modify
(
file
);
add_wchar
(
current
,
ret
);
...
...
This diff is collapsed.
Click to expand it.
include/linux/fs.h
浏览文件 @
493c84c0
...
...
@@ -1639,6 +1639,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
struct
iovec
**
ret_pointer
);
extern
ssize_t
__vfs_read
(
struct
file
*
,
char
__user
*
,
size_t
,
loff_t
*
);
extern
ssize_t
__vfs_write
(
struct
file
*
,
const
char
__user
*
,
size_t
,
loff_t
*
);
extern
ssize_t
vfs_read
(
struct
file
*
,
char
__user
*
,
size_t
,
loff_t
*
);
extern
ssize_t
vfs_write
(
struct
file
*
,
const
char
__user
*
,
size_t
,
loff_t
*
);
extern
ssize_t
vfs_readv
(
struct
file
*
,
const
struct
iovec
__user
*
,
...
...
This diff is collapsed.
Click to expand it.
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