mdv_dev
devfs_msg->mdv_dev.dev = dev;
devfs_msg->mdv_dev.uid = uid;
devfs_msg->mdv_dev.gid = gid;
devfs_msg->mdv_dev.perms = perms;
dev = msg->mdv_dev.dev;
msg->mdv_dev.uid,
msg->mdv_dev.gid,
msg->mdv_dev.perms);
dev = msg->mdv_dev.dev;