Add mirroring support across multiple drives

1 files changed, 4 insertions, 2 deletions

diff --git a/volumes.h b/volumes.h
index ae9e7bb7..a51cfe54 100644
--- a/volumes.h
+++ b/volumes.h
@@ -22,6 +22,8 @@ struct btrfs_device {
 	struct list_head dev_list;
 	struct btrfs_root *dev_root;
 
+	u64 total_ios;
+
 	int fd;
 
 	char *name;
@@ -67,9 +69,9 @@ struct btrfs_fs_devices {
 int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
 			   struct btrfs_device *device,
 			   u64 owner, u64 num_bytes, u64 *start);
-int btrfs_map_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, int stripe_nr,
 		    u64 logical, u64 *phys, u64 *length,
-		    struct btrfs_device **dev);
+		    struct btrfs_device **dev, int *total_stripes);
 int btrfs_read_sys_array(struct btrfs_root *root);
 int btrfs_read_chunk_tree(struct btrfs_root *root);
 int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,