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Kirill Smelkov
linux
Commits
e011599b
Commit
e011599b
authored
Jun 19, 2007
by
Chris Mason
Committed by
David Woodhouse
Jun 19, 2007
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Plain Diff
Btrfs: reada while dropping snapshots
Signed-off-by:
Chris Mason
<
chris.mason@oracle.com
>
parent
85e55b13
Changes
1
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1 changed file
with
30 additions
and
1 deletion
+30
-1
fs/btrfs/extent-tree.c
fs/btrfs/extent-tree.c
+30
-1
No files found.
fs/btrfs/extent-tree.c
View file @
e011599b
...
...
@@ -940,7 +940,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
int
wrapped
=
0
;
u64
limit
;
path
=
btrfs_alloc_path
();
ins
->
flags
=
0
;
btrfs_set_key_type
(
ins
,
BTRFS_EXTENT_ITEM_KEY
);
...
...
@@ -974,6 +973,8 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
data
,
1
);
}
path
=
btrfs_alloc_path
();
check_failed:
if
(
!
block_group
->
data
)
search_start
=
find_search_start
(
root
,
&
block_group
,
...
...
@@ -1355,6 +1356,28 @@ static int drop_leaf_ref(struct btrfs_trans_handle *trans,
return
0
;
}
static
void
reada_walk_down
(
struct
btrfs_root
*
root
,
struct
btrfs_node
*
node
)
{
int
i
;
u32
nritems
;
u64
blocknr
;
int
ret
;
u32
refs
;
nritems
=
btrfs_header_nritems
(
&
node
->
header
);
for
(
i
=
0
;
i
<
nritems
;
i
++
)
{
blocknr
=
btrfs_node_blockptr
(
node
,
i
);
ret
=
lookup_extent_ref
(
NULL
,
root
,
blocknr
,
1
,
&
refs
);
BUG_ON
(
ret
);
if
(
refs
!=
1
)
continue
;
ret
=
readahead_tree_block
(
root
,
blocknr
);
if
(
ret
)
break
;
}
}
/*
* helper function for drop_snapshot, this walks down the tree dropping ref
* counts as it goes.
...
...
@@ -1375,6 +1398,7 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON
(
ret
);
if
(
refs
>
1
)
goto
out
;
/*
* walk down to the last node level and free all the leaves
*/
...
...
@@ -1382,8 +1406,13 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
WARN_ON
(
*
level
<
0
);
WARN_ON
(
*
level
>=
BTRFS_MAX_LEVEL
);
cur
=
path
->
nodes
[
*
level
];
if
(
*
level
>
0
&&
path
->
slots
[
*
level
]
==
0
)
reada_walk_down
(
root
,
btrfs_buffer_node
(
cur
));
if
(
btrfs_header_level
(
btrfs_buffer_header
(
cur
))
!=
*
level
)
WARN_ON
(
1
);
if
(
path
->
slots
[
*
level
]
>=
btrfs_header_nritems
(
btrfs_buffer_header
(
cur
)))
break
;
...
...
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