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

PROGRAM!="/sbin/dmsetup status -j %M -m %m", GOTO="device_mapper_end"
ENV{DM_TYPE}="%c{3}"

ENV{DM_TYPE}=="|*error*", GOTO="device_mapper_end"

IMPORT{program}="vol_id --export $tempnode"
OPTIONS="link_priority=50"
ENV{DM_TYPE}=="*snapshot-origin*", OPTIONS="link_priority=60"
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"

LABEL="device_mapper_end"