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Filename : lvm2

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#!/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"

	case "$dev" in
	/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
}

activate "$1"

exit 0