virNetDevBandwidthUpdateRate: turn class_id into integer

This is no functional change. It's just that later in the series we
will need to pass class_id as an integer.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/network/bridge_driver.c

@@ -4840,7 +4840,7 @@ networkPlugBandwidth(virNetworkObjPtr net,
     }
     /* update rate for non guaranteed NICs */
     new_rate -= net->floor_sum;
-    if (virNetDevBandwidthUpdateRate(net->def->bridge, "1:2",
+    if (virNetDevBandwidthUpdateRate(net->def->bridge, 2,
                                      net->def->bandwidth, new_rate) < 0)
         VIR_WARN("Unable to update rate for 1:2 class on %s bridge",
                  net->def->bridge);
@@ -4891,7 +4891,7 @@ networkUnplugBandwidth(virNetworkObjPtr net,
         }
         /* update rate for non guaranteed NICs */
         new_rate -= net->floor_sum;
-        if (virNetDevBandwidthUpdateRate(net->def->bridge, "1:2",
+        if (virNetDevBandwidthUpdateRate(net->def->bridge, 2,
                                          net->def->bandwidth, new_rate) < 0)
             VIR_WARN("Unable to update rate for 1:2 class on %s bridge",
                      net->def->bridge);

src/util/virnetdevbandwidth.c

@@ -638,7 +638,8 @@ virNetDevBandwidthUnplug(const char *brname,
 /**
  * virNetDevBandwidthUpdateRate:
  * @ifname: interface name
- * @classid: ID of class to update
+ * @id: unique identifier
+ * @bandwidth: used to derive 'ceil' of class with @id
  * @new_rate: new rate
  *
  * This function updates the 'rate' attribute of HTB class.
@@ -650,16 +651,18 @@ virNetDevBandwidthUnplug(const char *brname,
  */
 int
 virNetDevBandwidthUpdateRate(const char *ifname,
-                             const char *class_id,
+                             unsigned int id,
                              virNetDevBandwidthPtr bandwidth,
                              unsigned long long new_rate)
 {
     int ret = -1;
     virCommandPtr cmd = NULL;
+    char *class_id = NULL;
     char *rate = NULL;
     char *ceil = NULL;
 
-    if (virAsprintf(&rate, "%llukbps", new_rate) < 0 ||
+    if (virAsprintf(&class_id, "1:%x", id) < 0 ||
+        virAsprintf(&rate, "%llukbps", new_rate) < 0 ||
         virAsprintf(&ceil, "%llukbps", bandwidth->in->peak ?
                     bandwidth->in->peak :
                     bandwidth->in->average) < 0)
@@ -677,6 +680,7 @@ virNetDevBandwidthUpdateRate(const char *ifname,
 
  cleanup:
     virCommandFree(cmd);
+    VIR_FREE(class_id);
     VIR_FREE(rate);
     VIR_FREE(ceil);
     return ret;

src/util/virnetdevbandwidth.h

@@ -68,11 +68,10 @@ int virNetDevBandwidthUnplug(const char *brname,
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
 
 int virNetDevBandwidthUpdateRate(const char *ifname,
-                                 const char *class_id,
+                                 unsigned int id,
                                  virNetDevBandwidthPtr bandwidth,
                                  unsigned long long new_rate)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_RETURN_CHECK;
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
 
 int virNetDevBandwidthUpdateFilter(const char *ifname,
                                    const virMacAddr *ifmac_ptr,