# /etc/udev/rules/64-device-mapper.rules:  device naming rules for udev
# $Header: /root/magellan-cvs/src/udev/udev-device-mapper.rules.magellan,v 1.1 2007-05-17 19:25:02 niro Exp $
#
# There are a number of modifiers that are allowed to be used in some
# of the different fields. They provide the following subsitutions:
# %n - the "kernel number" of the device.
#      For example, 'sda3' has a "kernel number" of '3'
# %k - the kernel name for the device.
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# %c - the string returned by the PROGRAM. (Note, this doesn't work within
#      the PROGRAM field for the obvious reason.)
# %s{filename} - the content of a sysfs attribute.
# %% - the '%' char itself.
#
# Try not to modify this file, if you wish to change things, create a new rule
# file that can be run before this one.
#

# device mapper links hook into "change" events, when the dm table
# becomes available; some table-types must be ignored

KERNEL=="device-mapper",	NAME="mapper/control"

KERNEL!="dm-*", GOTO="device_mapper_end"
ACTION!="add|change", GOTO="device_mapper_end"

# lookup device name
# use dmsetup, until devmap_name is provided by sys-fs/device-mapper
PROGRAM=="/sbin/dmsetup -j %M -m %m --noopencount --noheadings -c -o name info",
	ENV{DM_NAME}="%c"

# do not do anything if dmsetup does not provide a name
ENV{DM_NAME}=="", NAME="", OPTIONS="ignore_device"

# ignore luks crypt devices while not fully up
ENV{DM_NAME}=="temporary-cryptsetup-*", NAME="", OPTIONS="ignore_device"

# use queried name
ENV{DM_NAME}=="?*", NAME="mapper/$env{DM_NAME}"

SYMLINK+="disk/by-id/dm-name-$env{DM_NAME}"

PROGRAM!="/sbin/dmsetup status -j %M -m %m", GOTO="device_mapper_end"
RESULT=="|*snapshot*|*error*", GOTO="device_mapper_end"

IMPORT{program}="vol_id --export $tempnode"
OPTIONS="link_priority=50"
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_SAFE}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_SAFE}"
ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_SAFE}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_SAFE}"

LABEL="device_mapper_end"