+ # starting with e2fsprogs v1.47.0 mkfs.ext4 enables the metadata_csum_seed feature
+ # by default, which requires Linux kernel >=4.4, e2fsprogs >=1.43, according GRUB etc.
+ # Disable this feature for Debian releases older than bookworm
+ if [ -n "$MKFS" ] && [ "$MKFS" = "mkfs.ext4" ] ; then
+ case "$RELEASE" in
+ lenny|squeeze|wheezy|jessie|stretch|buster|bullseye)
+ local e2fsprogs_version
+ # assume a more recent version if we can't identify the version via dpkg-query
+ e2fsprogs_version="$(dpkg-query --show --showformat='${Version}' e2fsprogs 2>/dev/null || echo 1.47)"
+ if [ -n "$e2fsprogs_version" ] && dpkg --compare-versions "$e2fsprogs_version" ge '1.43' ; then
+ einfo "Disabling metadata_csum_seed feature for $MKFS as $RELEASE doesn't support it."
+ MKFS_OPTS="$MKFS_OPTS -O ^metadata_csum_seed"
+ eend 0
+ fi
+ ;;
+ esac
+ fi
+