/usr/lib/dracut/modules.d/90multipath/multipath-shutdown.sh is in dracut-core 047-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #!/bin/bash
for i in $(multipath -l -v1); do
if ! $(dmsetup table $i | sed -n '/.*queue_if_no_path.*/q1') ; then
dmsetup message $i 0 fail_if_no_path
fi
done
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