/lib/udev/rules.d/56-lvm.rules is in lvm2 2.02.66-4ubuntu7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | # Udev rules for LVM.
# See /usr/share/doc/lvm2/README.udev for further information.
ENV{DM_UDEV_RULES}=="", GOTO="lvm_end"
ENV{DM_UUID}!="LVM-?*", GOTO="lvm_end"
# Use DM name and split it up into its VG/LV/layer constituents.
IMPORT{program}="/sbin/dmsetup splitname --nameprefixes --noheadings --rows $env{DM_NAME}"
# Do not create symlinks for hidden subdevices.
ENV{DM_LV_NAME}=="?*_mimage_[0-9]*|pvmove?*|?*_vorigin", ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
ENV{DM_LV_LAYER}=="?*", ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
LABEL="lvm_end"
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