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# Udev rules for LVM.
#
# These rules create symlinks for LVM logical volumes in
# /dev/VG directory (VG is an actual VG name). Some udev
# environment variables are set (they can be used in later
# rules as well):
# DM_LV_NAME - logical volume name
# DM_VG_NAME - volume group name
# DM_LV_LAYER - logical volume layer (blank if not set)
SUBSYSTEM!="block", GOTO="lvm_end"
KERNEL!="dm-[0-9]*", GOTO="lvm_end"
ACTION!="add|change", GOTO="lvm_end"
ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="lvm_end"
ENV{DM_UUID}!="LVM-?*", GOTO="lvm_end"
# Normally, we operate on "change" events only. But when
# coldplugging, there's an "add" event present. We have
# to recognize this and do our actions in this particular
# situation, too.
ACTION=="add", ENV{STARTUP}!="1", GOTO="lvm_end"
# Use DM name and split it up into its VG/LV/layer constituents.
IMPORT{program}="$env{DM_SBIN_PATH}/dmsetup splitname --nameprefixes --noheadings --rows $env{DM_NAME}"
# Do not create symlinks for hidden subdevices.
ENV{DM_LV_NAME}=="?*_mimage_[0-9]*|pvmove?*|?*_vorigin", GOTO="lvm_end"
# Create symlinks for top-level devices only.
ENV{DM_VG_NAME}=="?*", ENV{DM_LV_NAME}=="?*", ENV{DM_LV_LAYER}!="?*", SYMLINK+="$env{DM_VG_NAME}/$env{DM_LV_NAME}"
LABEL="lvm_end"
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