#!/bin/sh

PREREQ="mdadm mdrun multipath"

prereqs()
{
        echo "$PREREQ"
}

case $1 in
# get pre-requisites
prereqs)
        prereqs
        exit 0
        ;;
esac

if [ ! -e /sbin/lvm ]; then
        exit 0
fi

lvchange_activate() {
        lvm lvchange -aay -y --sysinit --ignoreskippedcluster "$@"
}

activate() {
        local dev="$1"

        # Make sure that we have a non-empty argument
        if [ -z "$dev" ]; then
                return 1
        fi

        case "$dev" in
        # Take care of lilo boot arg, risky activating of all vg
        fe[0-9]*)
                lvchange_activate
                exit 0
                ;;
        # FIXME: check major
        /dev/root)
                lvchange_activate
                exit 0
                ;;

        /dev/mapper/*)
                eval $(dmsetup splitname --nameprefixes --noheadings --rows "${dev#/dev/mapper/}")
                if [ "$DM_VG_NAME" ] && [ "$DM_LV_NAME" ]; then
                        lvchange_activate "$DM_VG_NAME/$DM_LV_NAME"
                fi
                ;;

        /dev/*/*)
                # Could be /dev/VG/LV; use lvs to check
                if lvm lvs -- "$dev" >/dev/null 2>&1; then
                        lvchange_activate "$dev"
                fi
                ;;
        esac
}

conffile=/conf/btrfs-lvm

if [ -n "$conffile" ]; then
	cat $conffile | ( while read dev; do
		activate "$dev"
	done )
fi