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# 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 $tempnode"
OPTIONS="link_priority=50"
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$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"
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