virNetDevBandwidthParseRate: Reject negative values

https://bugzilla.redhat.com/show_bug.cgi?id=1022292

The following XML really does not make any sense:

<inbound average="-1" burst="-2" peak="-3" floor="-4"/>

There can't be a negative packet rate. Well, so far we haven't
assigned any meaning to it. So reject it unless users harm themselves,
because otherwise we turn the negative numbers into really big values.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/conf/netdev_bandwidth_conf.c

@@ -50,7 +50,7 @@ virNetDevBandwidthParseRate(xmlNodePtr node, virNetDevBandwidthRatePtr rate)
     floor = virXMLPropString(node, "floor");
 
     if (average) {
-        if (virStrToLong_ull(average, NULL, 10, &rate->average) < 0) {
+        if (virStrToLong_ullp(average, NULL, 10, &rate->average) < 0) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                            _("could not convert bandwidth average value '%s'"),
                            average);
@@ -68,21 +68,21 @@ virNetDevBandwidthParseRate(xmlNodePtr node, virNetDevBandwidthRatePtr rate)
         goto cleanup;
     }
 
-    if (peak && virStrToLong_ull(peak, NULL, 10, &rate->peak) < 0) {
+    if (peak && virStrToLong_ullp(peak, NULL, 10, &rate->peak) < 0) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("could not convert bandwidth peak value '%s'"),
                        peak);
         goto cleanup;
     }
 
-    if (burst && virStrToLong_ull(burst, NULL, 10, &rate->burst) < 0) {
+    if (burst && virStrToLong_ullp(burst, NULL, 10, &rate->burst) < 0) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("could not convert bandwidth burst value '%s'"),
                        burst);
         goto cleanup;
     }
 
-    if (floor && virStrToLong_ull(floor, NULL, 10, &rate->floor) < 0) {
+    if (floor && virStrToLong_ullp(floor, NULL, 10, &rate->floor) < 0) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("could not convert bandwidth floor value '%s'"),
                        floor);