util-linux/lsblk.c at 0e0a3b59da9a7fd313c4ddf20f24c7a708d42fc...
if (is_dm(dev->name)) { char *dm_uuid = NULL;/* The DM_UUID prefix should be set to subsystem owning * the device - LVM, CRYPT, DMRAID, MPATH, PART */ if (ul_path_read_string(dev->sysfs, &dm_uuid, "dm/uuid") > 0