SUBSYSTEM!="block", GOTO="btrfs_end" ACTION!="add|change", GOTO="btrfs_end" KERNEL=="xvd*", IMPORT{program}="/sbin/blkid -o udev -p $tempnode" ENV{ID_FS_TYPE}=="btrfs", RUN+="/sbin/btrfs device scan $env{DEVNAME}" LABEL="btrfs_end"