consolidated s390 device configuration - step 2: cleanup

dasdconfmigrate.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: MIT
+# Copyright IBM Corp. 2023
+
+# This is just a wrapper to migrate old /etc/dasd.conf to the new
+# consolidated persistent configuration of s390 devices with chzdev.
+
+CONFIG=/etc/dasd.conf
+PATH=/sbin:/bin
+export PATH
+
+DATE=$(date --iso-8601=seconds)
+PREFIX="${CONFIG}.${DATE}.migrated-to-chzdev"
+
+if [ -f "$CONFIG" ]; then
+    # show migration output to users and log it into file
+    exec > >(tee "${PREFIX}.log") 2>&1
+    sed 'y/ABCDEF/abcdef/' < $CONFIG | while read -r line; do
+        case $line in
+            \#*) ;;
+            *)
+                [ -z "$line" ] && continue
+		# shellcheck disable=SC2086
+                set -- $line
+
+		chzdev --enable --active --persistent dasd "$@" --yes --no-root-update --force --no-settle
+		case $? in
+		    0)
+			# If device exists and could be actively enabled,
+			# chzdev could infer the actual dasd device type; done.
+			continue
+			;;
+		esac
+		# Configure persistently only to allow migration of
+		# configuration for devices that currently do not exist.
+		# Chzdev cannot infer the actual dasd device type for an
+		# absent device. Therefore, create duplicate configurations
+		# for both dasd-eckd and dasd-fba, so either one of them
+		# can enable such device when it appears.
+		chzdev --enable --persistent dasd-eckd "$@" --yes --no-root-update --force --no-settle
+		chzdev --enable --persistent dasd-fba "$@" --yes --no-root-update --force --no-settle
+                ;;
+        esac
+    done
+    mv "$CONFIG" "$CONFIG"."$DATE".migrated-to-chzdev
+    echo "dasdconfmigrate.sh: Information: Your persistent dasd device configuration file $CONFIG was migrated to the new consolidated mechanism. From now on, please use lszdev and chzdev from s390utils instead. To finally complete the migration, please run: kdumpctl rebuild; systemctl restart kdump; dracut -f; zipl"
+fi