BTRFS_DEVICE_PATH_NAME_MAX 136 include/uapi/linux/btrfs.h __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ BTRFS_DEVICE_PATH_NAME_MAX 137 include/uapi/linux/btrfs.h __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ BTRFS_DEVICE_PATH_NAME_MAX 178 include/uapi/linux/btrfs.h __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */