devmap_name - Query device-mapper name
devmap_name major minor
devmap_name queries the device-mapper for the name for the device
specified by major and minor number.
devmap_name can be called from udev by the following rule in
/etc/udev/udev.rules:
KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", \
NAME="%k", SYMLINK="%c"
udev(8), dmsetup(8)
devmap_name was developed by Christophe Varoqui,
<christophe.varoqui@free.fr> and others.
July 2006