1 #val_type uint64_t 2 BTRFS_BALANCE_DATA (1ULL << 0) 3 BTRFS_BALANCE_SYSTEM (1ULL << 1) 4 BTRFS_BALANCE_METADATA (1ULL << 2) 5 BTRFS_BALANCE_FORCE (1ULL << 3) 6 BTRFS_BALANCE_RESUME (1ULL << 4) 7