[libvirt] [PATCH 2/3] qemu: Check for generated MACs while detaching interface

[Michal Privoznik]

When detaching interface without <mac> specified a one is generated
which leads to not found device.
---
 src/qemu/qemu_hotplug.c |   26 ++++++++++++++++++++------
 1 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 0002af0..54c97db 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1436,18 +1436,32 @@ int qemuDomainDetachNetDevice(struct qemud_driver *driver,
                               virDomainDeviceDefPtr dev,
                               virBitmapPtr qemuCaps)
 {
-    int i, ret = -1;
+    int i = 0, ret = -1;
     virDomainNetDefPtr detach = NULL;
     qemuDomainObjPrivatePtr priv = vm->privateData;
     int vlan;
     char *hostnet_name = NULL;
 
-    for (i = 0 ; i < vm->def->nnets ; i++) {
-        virDomainNetDefPtr net = vm->def->nets[i];
+    if (!vm->def->nnets) {
+        qemuReportError(VIR_ERR_OPERATION_FAILED,
+                        _("domain has no interfaces."));
+        goto cleanup;
+    } else if ((vm->def->nnets > 2) && (dev->data.net->mac_generated)) {
+        qemuReportError(VIR_ERR_OPERATION_FAILED,
+                        _("You must specify mac address in xml file"));
+        goto cleanup;
+    }
 
-        if (!memcmp(net->mac, dev->data.net->mac,  sizeof(net->mac))) {
-            detach = net;
-            break;
+    if ((vm->def->nnets==1) && (dev->data.net->mac_generated)) {
+        detach = vm->def->nets[0];
+    } else {
+        for (i = 0 ; i < vm->def->nnets ; i++) {
+            virDomainNetDefPtr net = vm->def->nets[i];
+
+            if (!memcmp(net->mac, dev->data.net->mac,  sizeof(net->mac))) {
+                detach = net;
+                break;
+            }
         }
     }
 
-- 
1.7.4