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authorChristoph Hellwig <hch@lst.de>2007-09-10 20:02:30 -0400
committerDavid Woodhouse <dwmw2@hera.kernel.org>2007-09-10 20:02:30 -0400
commitd396c6f554d182b7bce4e2bb2acb47f80430c05f (patch)
tree2bc7b567310474ed4562d4e1246efd69a868f8cd /fs/btrfs/extent_map.h
parent90f1c19a9fd2a943adc69d2b9b8c83bcc4bba6f9 (diff)
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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 0eae6c420ac..da41aca74e0 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);