Add root tree pointer transaction ids

This patch adds transaction IDs to root tree pointers.
Transaction IDs in tree pointers are compared with the
generation numbers in block headers when reading root
blocks of trees. This can detect some types of IO errors.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/utils.c b/utils.c
index 6b76dd3c..fa3cef46 100644
--- a/utils.c
+++ b/utils.c
@@ -101,6 +101,7 @@ int make_btrfs(int fd, const char *device, const char *label,
 	btrfs_set_super_leafsize(&super, leafsize);
 	btrfs_set_super_nodesize(&super, nodesize);
 	btrfs_set_super_stripesize(&super, stripesize);
+	btrfs_set_super_chunk_root_generation(&super, 1);
 	if (label)
 		strcpy(super.label, label);
 
@@ -130,6 +131,7 @@ int make_btrfs(int fd, const char *device, const char *label,
 	btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
 	btrfs_set_root_refs(&root_item, 1);
 	btrfs_set_root_used(&root_item, leafsize);
+	btrfs_set_root_generation(&root_item, 1);
 
 	memset(&disk_key, 0, sizeof(disk_key));
 	btrfs_set_disk_key_type(&disk_key, BTRFS_ROOT_ITEM_KEY);