btrfs-progs: Introduce change_header_uuid function

This function is used to change fsid and chunk_tree_uuid of a node/leaf.
The function does it without transaction protection.

This is the basis of offline uuid change.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/ctree.h b/ctree.h
index 98cb1fb9..79a3310b 100644
--- a/ctree.h
+++ b/ctree.h
@@ -955,7 +955,9 @@ struct btrfs_device;
 struct btrfs_fs_devices;
 struct btrfs_fs_info {
 	u8 fsid[BTRFS_FSID_SIZE];
+	u8 *new_fsid;
 	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+	u8 *new_chunk_tree_uuid;
 	struct btrfs_root *fs_root;
 	struct btrfs_root *extent_root;
 	struct btrfs_root *tree_root;