#!/bin/sh
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DAEMON="libvirtd"
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EXECFILE="/usr/sbin/$DAEMON"
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PIDFILE="/var/run/$DAEMON.pid"
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LIBVIRTD_ARGS=""
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# shellcheck source=/dev/null
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[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
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trap 'rm -f "$TMP_MODULE_LIST" "$TMP_PIDFILE_LIST"' EXIT
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is_alive() {
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[ -e "$1" ] \
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&& exe="/proc/$(cat "$1" 2>/dev/null)/exe" \
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&& [ -s "$exe" ] \
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&& [ "$(readlink -f "$exe")" = "$2" ]
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}
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load_modules() {
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printf 'Loading kernel modules: '
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kver="$(uname -r)"
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TMP_MODULE_LIST="$(mktemp -q)" || {
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echo 'FAIL creating temporary modules list'
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exit 1
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}
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[ -d "/lib/modules/$kver/kernel/drivers/net" ] && \
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find "/lib/modules/$kver/kernel/drivers/net" \
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-name "tun.ko*" >> "$TMP_MODULE_LIST"
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[ -d "/lib/modules/$kver/kernel/drivers/vhost" ] && \
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find "/lib/modules/$kver/kernel/drivers/vhost" \
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-name "vhost?net.ko*" >> "$TMP_MODULE_LIST"
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[ -d "/lib/modules/$kver/kernel/drivers/net" ] && \
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find "/lib/modules/$kver/kernel/drivers/vfio" \
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-name "*.ko*" >> "$TMP_MODULE_LIST"
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while read -r f; do
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m="$(basename "${f%.ko*}")"
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if modprobe -q "$m"; then
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printf '%s ' "$m"
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else
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echo "FAIL on $m"
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exit 1
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fi
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done < "$TMP_MODULE_LIST"
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echo "OK"
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}
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#
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# If libvirtd dies it leves behind one stale dnsmasq per virtual network that
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# must be killed before starting libvirtd again.
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#
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rm_stale_dnsmasq() {
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[ -d /var/run/libvirt/network ] || return 0
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TMP_PIDFILE_LIST="$(mktemp -q)" || {
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echo "Could not create temporary pidfile list"
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exit 1
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}
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find /var/run/libvirt/network -name '*.pid' > "$TMP_PIDFILE_LIST"
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while read -r pidfile; do
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if is_alive "$pidfile" /usr/sbin/dnsmasq; then
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start-stop-daemon -K -q -p "$pidfile" -x /usr/sbin/dnsmasq
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status=$?
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if [ "$status" -ne 0 ]; then
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echo "Could not stop stale dnsmasq daemons"
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exit 1
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fi
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rm -f "$pidfile"
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fi
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done < "$TMP_PIDFILE_LIST"
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}
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start() {
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if is_alive "$PIDFILE" "$EXECFILE"; then
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# libvirtd is already running. Leave it alone.
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printf 'Starting %s: FAIL\n' "$DAEMON"
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return 1
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fi
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rm_stale_dnsmasq
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load_modules
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printf 'Starting %s: ' "$DAEMON"
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# shellcheck disable=SC2086 # we need the word splitting
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start-stop-daemon -S -q -p "$PIDFILE" -x "$EXECFILE" \
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-- -d $LIBVIRTD_ARGS
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status=$?
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if [ "$status" -eq 0 ]; then
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echo "OK"
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else
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echo "FAIL"
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fi
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return "$status"
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}
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stop() {
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printf 'Stopping %s: ' "$DAEMON"
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start-stop-daemon -K -q -p "$PIDFILE" -x "$EXECFILE"
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status=$?
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if [ "$status" -eq 0 ]; then
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rm_stale_dnsmasq
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echo "OK"
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else
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echo "FAIL"
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fi
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return "$status"
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}
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restart() {
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stop
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sleep 1
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start
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}
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# On receipt of SIGHUP libvirtd will reload its configuration.
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reload() {
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printf 'Reloading %s: ' "$DAEMON"
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start-stop-daemon -K -s HUP -q -p "$PIDFILE" -x "$EXECFILE"
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status=$?
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if [ "$status" -eq 0 ]; then
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echo "OK"
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else
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echo "FAIL"
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fi
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return "$status"
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}
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case "$1" in
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start|stop|restart|reload)
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"$1";;
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*)
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echo "Usage: $0 {start|stop|restart|reload}"
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exit 1
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esac
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