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| author | Christoph Hellwig <hch@lst.de> | 2007-09-10 20:02:30 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-09-10 20:02:30 -0400 |
| commit | d396c6f554d182b7bce4e2bb2acb47f80430c05f (patch) | |
| tree | 2bc7b567310474ed4562d4e1246efd69a868f8cd /fs/btrfs/extent_map.h | |
| parent | 90f1c19a9fd2a943adc69d2b9b8c83bcc4bba6f9 (diff) | |
| download | lwn-d396c6f554d182b7bce4e2bb2acb47f80430c05f.tar.gz lwn-d396c6f554d182b7bce4e2bb2acb47f80430c05f.zip | |
Btrfs: [PATCH] extent_map: provide generic bmap
generic_bmap is completely trivial, while the extent to bh mapping in
btrfs is rather complex. So provide a extent_bmap instead that takes
a get_extent callback and can be used by filesystem using the extent_map
code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 0eae6c420acb..da41aca74e0b 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -99,6 +99,8 @@ int extent_prepare_write(struct extent_map_tree *tree, int extent_commit_write(struct extent_map_tree *tree, struct inode *inode, struct page *page, unsigned from, unsigned to); +sector_t extent_bmap(struct address_space *mapping, sector_t iblock, + get_extent_t *get_extent); int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end); int set_state_private(struct extent_map_tree *tree, u64 start, u64 private); int get_state_private(struct extent_map_tree *tree, u64 start, u64 *private); |