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Kirill Smelkov
linux
Commits
4beb1b8b
Commit
4beb1b8b
authored
Mar 14, 2007
by
Chris Mason
Committed by
David Woodhouse
Mar 14, 2007
Browse files
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Plain Diff
Btrfs: add leaf data casting helper
Signed-off-by:
Chris Mason
<
chris.mason@oracle.com
>
parent
71087494
Changes
3
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3 changed files
with
8 additions
and
9 deletions
+8
-9
fs/btrfs/ctree.h
fs/btrfs/ctree.h
+4
-0
fs/btrfs/extent-tree.c
fs/btrfs/extent-tree.c
+2
-6
fs/btrfs/print-tree.c
fs/btrfs/print-tree.c
+2
-3
No files found.
fs/btrfs/ctree.h
View file @
4beb1b8b
...
...
@@ -401,6 +401,10 @@ static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
s
->
blocksize
=
cpu_to_le16
(
val
);
}
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)((leaf)->data + btrfs_item_offset((leaf)->items + (slot))))
struct
btrfs_buffer
*
btrfs_alloc_free_block
(
struct
btrfs_root
*
root
);
int
btrfs_inc_ref
(
struct
btrfs_root
*
root
,
struct
btrfs_buffer
*
buf
);
int
btrfs_free_extent
(
struct
btrfs_root
*
root
,
u64
blocknr
,
u64
num_blocks
);
...
...
fs/btrfs/extent-tree.c
View file @
4beb1b8b
...
...
@@ -41,9 +41,7 @@ static int inc_block_ref(struct btrfs_root *root, u64 blocknr)
BUG
();
BUG_ON
(
ret
!=
0
);
l
=
&
path
.
nodes
[
0
]
->
leaf
;
item
=
(
struct
btrfs_extent_item
*
)(
l
->
data
+
btrfs_item_offset
(
l
->
items
+
path
.
slots
[
0
]));
item
=
btrfs_item_ptr
(
l
,
path
.
slots
[
0
],
struct
btrfs_extent_item
);
refs
=
btrfs_extent_refs
(
item
);
btrfs_set_extent_refs
(
item
,
refs
+
1
);
...
...
@@ -69,9 +67,7 @@ static int lookup_block_ref(struct btrfs_root *root, u64 blocknr, u32 *refs)
if
(
ret
!=
0
)
BUG
();
l
=
&
path
.
nodes
[
0
]
->
leaf
;
item
=
(
struct
btrfs_extent_item
*
)(
l
->
data
+
btrfs_item_offset
(
l
->
items
+
path
.
slots
[
0
]));
item
=
btrfs_item_ptr
(
l
,
path
.
slots
[
0
],
struct
btrfs_extent_item
);
*
refs
=
btrfs_extent_refs
(
item
);
btrfs_release_path
(
root
->
extent_root
,
&
path
);
return
0
;
...
...
fs/btrfs/print-tree.c
View file @
4beb1b8b
...
...
@@ -26,11 +26,10 @@ void btrfs_print_leaf(struct btrfs_leaf *l)
btrfs_item_size
(
item
));
printf
(
"
\t\t
item data %.*s
\n
"
,
btrfs_item_size
(
item
),
l
->
data
+
btrfs_item_offset
(
item
));
ei
=
(
struct
btrfs_extent_item
*
)(
l
->
data
+
btrfs_item_offset
(
item
));
ei
=
btrfs_item_ptr
(
l
,
i
,
struct
btrfs_extent_item
);
printf
(
"
\t\t
extent data refs %u owner %Lu
\n
"
,
btrfs_extent_refs
(
ei
),
btrfs_extent_owner
(
ei
));
ri
=
(
struct
btrfs_root_item
*
)
ei
;
ri
=
btrfs_item_ptr
(
l
,
i
,
struct
btrfs_root_item
)
;
printf
(
"
\t\t
root data blocknr %Lu refs %u
\n
"
,
btrfs_root_blocknr
(
ri
),
btrfs_root_refs
(
ri
));
fflush
(
stdout
);
...
...
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