dm-cache/mdev/dmcache.mdev

#!/bin/sh

# mdev script to mask dm-cache origin device's FS UUID
#
# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright 2023 Forza <forza@tnonline.net>

uuid_file="/etc/dmcache-uuids"

# Check if the file exists
if [ ! -f "$uuid_file" ]; then
    echo "Error: File '$uuid_file' not found."
    exit 1
fi

# Loop through each UUID in the file and remove the corresponding symlink
while IFS= read -r uuid; do

	if [ -z "$uuid" ] || [ "${uuid:0:1}" = "#" ]; then
		continue
	fi

    symlink="/dev/disk/by-uuid/$uuid"

    # Check if the symlink exists
    if [ -L "$symlink" ]; then
        echo "Removing symlink: $symlink"
        rm "$symlink"
    fi
done < "$uuid_file"