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7f2f12d9
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体验新版 GitCode,发现更多精彩内容 >>
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7f2f12d9
编写于
2月 19, 2010
作者:
T
Trond Myklebust
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
NFS: Simplify nfs_wb_page()
Signed-off-by:
N
Trond Myklebust
<
Trond.Myklebust@netapp.com
>
上级
acdc53b2
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
23 addition
and
98 deletion
+23
-98
fs/nfs/write.c
fs/nfs/write.c
+23
-97
include/linux/nfs_fs.h
include/linux/nfs_fs.h
+0
-1
未找到文件。
fs/nfs/write.c
浏览文件 @
7f2f12d9
...
...
@@ -502,44 +502,6 @@ int nfs_reschedule_unstable_write(struct nfs_page *req)
}
#endif
/*
* Wait for a request to complete.
*
* Interruptible by fatal signals only.
*/
static
int
nfs_wait_on_requests_locked
(
struct
inode
*
inode
,
pgoff_t
idx_start
,
unsigned
int
npages
)
{
struct
nfs_inode
*
nfsi
=
NFS_I
(
inode
);
struct
nfs_page
*
req
;
pgoff_t
idx_end
,
next
;
unsigned
int
res
=
0
;
int
error
;
if
(
npages
==
0
)
idx_end
=
~
0
;
else
idx_end
=
idx_start
+
npages
-
1
;
next
=
idx_start
;
while
(
radix_tree_gang_lookup_tag
(
&
nfsi
->
nfs_page_tree
,
(
void
**
)
&
req
,
next
,
1
,
NFS_PAGE_TAG_LOCKED
))
{
if
(
req
->
wb_index
>
idx_end
)
break
;
next
=
req
->
wb_index
+
1
;
BUG_ON
(
!
NFS_WBACK_BUSY
(
req
));
kref_get
(
&
req
->
wb_kref
);
spin_unlock
(
&
inode
->
i_lock
);
error
=
nfs_wait_on_request
(
req
);
nfs_release_request
(
req
);
spin_lock
(
&
inode
->
i_lock
);
if
(
error
<
0
)
return
error
;
res
++
;
}
return
res
;
}
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
static
int
nfs_need_commit
(
struct
nfs_inode
*
nfsi
)
...
...
@@ -1432,7 +1394,7 @@ static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_contr
return
ret
;
}
#else
static
in
line
int
nfs_commit_list
(
struct
inode
*
inode
,
struct
list_head
*
head
,
int
how
)
static
in
t
nfs_commit_inode
(
struct
inode
*
inode
,
int
how
)
{
return
0
;
}
...
...
@@ -1448,46 +1410,6 @@ int nfs_write_inode(struct inode *inode, struct writeback_control *wbc)
return
nfs_commit_unstable_pages
(
inode
,
wbc
);
}
long
nfs_sync_mapping_wait
(
struct
address_space
*
mapping
,
struct
writeback_control
*
wbc
,
int
how
)
{
struct
inode
*
inode
=
mapping
->
host
;
pgoff_t
idx_start
,
idx_end
;
unsigned
int
npages
=
0
;
LIST_HEAD
(
head
);
long
pages
,
ret
;
/* FIXME */
if
(
wbc
->
range_cyclic
)
idx_start
=
0
;
else
{
idx_start
=
wbc
->
range_start
>>
PAGE_CACHE_SHIFT
;
idx_end
=
wbc
->
range_end
>>
PAGE_CACHE_SHIFT
;
if
(
idx_end
>
idx_start
)
{
pgoff_t
l_npages
=
1
+
idx_end
-
idx_start
;
npages
=
l_npages
;
if
(
sizeof
(
npages
)
!=
sizeof
(
l_npages
)
&&
(
pgoff_t
)
npages
!=
l_npages
)
npages
=
0
;
}
}
spin_lock
(
&
inode
->
i_lock
);
do
{
ret
=
nfs_wait_on_requests_locked
(
inode
,
idx_start
,
npages
);
if
(
ret
!=
0
)
continue
;
pages
=
nfs_scan_commit
(
inode
,
&
head
,
idx_start
,
npages
);
if
(
pages
==
0
)
break
;
pages
+=
nfs_scan_commit
(
inode
,
&
head
,
0
,
0
);
spin_unlock
(
&
inode
->
i_lock
);
ret
=
nfs_commit_list
(
inode
,
&
head
,
how
);
spin_lock
(
&
inode
->
i_lock
);
}
while
(
ret
>=
0
);
spin_unlock
(
&
inode
->
i_lock
);
return
ret
;
}
/*
* flush the inode to disk.
*/
...
...
@@ -1531,45 +1453,49 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page)
return
ret
;
}
static
int
nfs_wb_page_priority
(
struct
inode
*
inode
,
struct
page
*
page
,
int
how
)
/*
* Write back all requests on one page - we do this before reading it.
*/
int
nfs_wb_page
(
struct
inode
*
inode
,
struct
page
*
page
)
{
loff_t
range_start
=
page_offset
(
page
);
loff_t
range_end
=
range_start
+
(
loff_t
)(
PAGE_CACHE_SIZE
-
1
);
struct
writeback_control
wbc
=
{
.
bdi
=
page
->
mapping
->
backing_dev_info
,
.
sync_mode
=
WB_SYNC_ALL
,
.
nr_to_write
=
LONG_MAX
,
.
nr_to_write
=
0
,
.
range_start
=
range_start
,
.
range_end
=
range_end
,
};
struct
nfs_page
*
req
;
int
need_commit
;
int
ret
;
do
{
while
(
PagePrivate
(
page
))
{
if
(
clear_page_dirty_for_io
(
page
))
{
ret
=
nfs_writepage_locked
(
page
,
&
wbc
);
if
(
ret
<
0
)
goto
out_error
;
}
else
if
(
!
PagePrivate
(
page
))
}
req
=
nfs_find_and_lock_request
(
page
);
if
(
!
req
)
break
;
ret
=
nfs_sync_mapping_wait
(
page
->
mapping
,
&
wbc
,
how
);
if
(
ret
<
0
)
if
(
IS_ERR
(
req
))
{
ret
=
PTR_ERR
(
req
);
goto
out_error
;
}
while
(
PagePrivate
(
page
));
}
need_commit
=
test_bit
(
PG_CLEAN
,
&
req
->
wb_flags
);
nfs_clear_page_tag_locked
(
req
);
if
(
need_commit
)
{
ret
=
nfs_commit_inode
(
inode
,
FLUSH_SYNC
);
if
(
ret
<
0
)
goto
out_error
;
}
}
return
0
;
out_error:
__mark_inode_dirty
(
inode
,
I_DIRTY_PAGES
);
return
ret
;
}
/*
* Write back all requests on one page - we do this before reading it.
*/
int
nfs_wb_page
(
struct
inode
*
inode
,
struct
page
*
page
)
{
return
nfs_wb_page_priority
(
inode
,
page
,
FLUSH_STABLE
);
}
#ifdef CONFIG_MIGRATION
int
nfs_migrate_page
(
struct
address_space
*
mapping
,
struct
page
*
newpage
,
struct
page
*
page
)
...
...
include/linux/nfs_fs.h
浏览文件 @
7f2f12d9
...
...
@@ -475,7 +475,6 @@ extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
* Try to write back everything synchronously (but check the
* return value!)
*/
extern
long
nfs_sync_mapping_wait
(
struct
address_space
*
,
struct
writeback_control
*
,
int
);
extern
int
nfs_wb_all
(
struct
inode
*
inode
);
extern
int
nfs_wb_page
(
struct
inode
*
inode
,
struct
page
*
page
);
extern
int
nfs_wb_page_cancel
(
struct
inode
*
inode
,
struct
page
*
page
);
...
...
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