/lib/udev/rules.d/69-vdev.rules is in zfsutils-linux 0.6.5.6-0ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | ENV{DEVTYPE}=="disk", IMPORT{program}="/lib/udev/vdev_id -d %k"
KERNEL=="*[!0-9]", ENV{SUBSYSTEM}=="block", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}"
KERNEL=="*[0-9]", ENV{SUBSYSTEM}=="block", ENV{DEVTYPE}=="partition", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}-part%n"
KERNEL=="dm-[0-9]*", ENV{SUBSYSTEM}=="block", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}"
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