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authorJosef Bacik <josef@redhat.com>2011-09-26 13:56:12 -0400
committerJosef Bacik <josef@redhat.com>2011-10-19 15:12:47 -0400
commit462d6fac8960a3ba797927adfcbd29d503eb16fd (patch)
tree82e72468a746b55d09246db8272823c2907633e1 /fs/btrfs/extent_io.h
parentef3be45722317f8c2fb0e861065df0c3830ff9ac (diff)
Btrfs: introduce convert_extent_bit
If I have a range where I know a certain bit is and I want to set it to another bit the only option I have is to call set and then clear bit, which will result in 2 tree searches. This is inefficient, so introduce convert_extent_bit which will go through and set the bit I want and clear the old bit I don't want. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r--fs/btrfs/extent_io.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 7b2f0c3e792..cea445dcd80 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -214,6 +214,8 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
+int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int clear_bits, gfp_t mask);
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,