/lib/udev/rules.d/60-multipath.rules is in multipath-tools 0.7.4-2ubuntu3.
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 15 16 17 18 19 20 21 22 23 24 25 26 27 | # Set DM_MULTIPATH_DEVICE_PATH if the device should be handled by multipath
SUBSYSTEM!="block", GOTO="end_mpath"
ACTION!="add|change", GOTO="end_mpath"
KERNEL!="sd*|dasd*", GOTO="end_mpath"
IMPORT{cmdline}="nompath"
ENV{nompath}=="?*", GOTO="end_mpath"
IMPORT{cmdline}="multipath"
ENV{multipath}=="off", GOTO="end_mpath"
ENV{DEVTYPE}!="partition", GOTO="test_dev"
IMPORT{parent}="DM_MULTIPATH_DEVICE_PATH"
ENV{DM_MULTIPATH_DEVICE_PATH}=="1", ENV{ID_FS_TYPE}="none", \
ENV{SYSTEMD_READY}="0"
GOTO="end_mpath"
LABEL="test_dev"
ENV{MPATH_SBIN_PATH}="/sbin"
TEST!="$env{MPATH_SBIN_PATH}/multipath", ENV{MPATH_SBIN_PATH}="/usr/sbin"
ENV{DM_MULTIPATH_DEVICE_PATH}!="1", \
PROGRAM=="$env{MPATH_SBIN_PATH}/multipath -u %k", \
ENV{DM_MULTIPATH_DEVICE_PATH}="1", ENV{ID_FS_TYPE}="mpath_member", \
ENV{SYSTEMD_READY}="0"
LABEL="end_mpath"
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