qemu: test if bandwidth has 'floor' factored out to separate function

This compound condition will be useful in several places so it
makes sense to give it a name for better readability.
Signed-off-by: NPavel Mores <pmores@redhat.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/conf/netdev_bandwidth_conf.c

@@ -297,3 +297,10 @@ virDomainClearNetBandwidth(virDomainObjPtr vm)
             virNetDevBandwidthClear(vm->def->nets[i]->ifname);
     }
 }
+
+
+bool
+virNetDevBandwidthHasFloor(const virNetDevBandwidth *b)
+{
+    return b && b->in && b->in->floor != 0;
+}

src/conf/netdev_bandwidth_conf.h

@@ -57,3 +57,6 @@ static inline bool virNetDevSupportBandwidth(virDomainNetType type)
     }
     return false;
 }
+
+
+bool virNetDevBandwidthHasFloor(const virNetDevBandwidth *b);

src/libvirt_private.syms

@@ -733,6 +733,7 @@ virInterfaceDefParseString;
 # conf/netdev_bandwidth_conf.h
 virDomainClearNetBandwidth;
 virNetDevBandwidthFormat;
+virNetDevBandwidthHasFloor;
 virNetDevBandwidthParse;
 
 

src/network/bridge_driver.c

@@ -5065,7 +5065,7 @@ networkCheckBandwidth(virNetworkObjPtr obj,
 
     virMacAddrFormat(ifaceMac, ifmac);
 
-    if (ifaceBand && ifaceBand->in && ifaceBand->in->floor &&
+    if (virNetDevBandwidthHasFloor(ifaceBand) &&
         !(netBand && netBand->in)) {
         virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
                        _("Invalid use of 'floor' on interface with MAC "
@@ -5079,8 +5079,9 @@ networkCheckBandwidth(virNetworkObjPtr obj,
         /* no QoS required, claim success */
         return 1;
     }
-    if (((!ifaceBand || !ifaceBand->in || !ifaceBand->in->floor) &&
-         (!oldBandwidth || !oldBandwidth->in || !oldBandwidth->in->floor))) {
+    if (!virNetDevBandwidthHasFloor(ifaceBand) &&
+        !virNetDevBandwidthHasFloor(oldBandwidth)) {
+
         VIR_DEBUG("No old/new interface bandwidth floor");
         /* no QoS required, claim success */
         return 1;