Btrfs: directory readahead
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 444ebb0..1ee7d2a 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -5,6 +5,11 @@
#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
+enum btrfs_bh_state_bits {
+ BH_Checked = BH_PrivateStart,
+};
+BUFFER_FNS(Checked, checked);
+
static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
{
return (struct btrfs_node *)bh->b_data;
@@ -21,6 +26,7 @@
}
struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr);
+int readahead_tree_block(struct btrfs_root *root, u64 blocknr);
struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 blocknr);
int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,