Fix auto-adding of virtio serial controllers

The domain parsing code would auto-add a virtio serial controller
if it saw any virtio serial channel defined. Unfortunately it
always added a controller with index=0, even if the channel address
specified an index != 0. It only added one controller, even if
multiple controllers were referenced by channels. Finally, it let
the ports+vectors parameters initialize to zero instead of -1, which
prevented the controllers accepting any ports.

* src/conf/domain_conf.c: Initialize ports+vectors when adding
  virtio serial controllers. Add all neccessary virtio serial
  controllers, instead of hardcoding controller 0
* qemuxml2argvdata/qemuxml2argv-channel-virtio.args,
  qemuxml2argvdata/qemuxml2argv-channel-virtio.xml: Expand to
  test controller auto-add behaviour

src/conf/domain_conf.c

@@ -4385,6 +4385,10 @@ static virDomainDefPtr virDomainDefParseXML(virCapsPtr caps,
 
         def->channels[def->nchannels++] = chr;
 
+        if (chr->targetType == VIR_DOMAIN_CHR_TARGET_TYPE_VIRTIO &&
+            chr->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE)
+            chr->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL;
+
         if (chr->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL &&
             chr->info.addr.vioserial.port == 0) {
             int maxport = -1;
@@ -4797,6 +4801,12 @@ static int virDomainDefMaybeAddController(virDomainDefPtr def,
     cont->type = type;
     cont->idx = idx;
 
+    if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL) {
+        cont->opts.vioserial.ports = -1;
+        cont->opts.vioserial.vectors = -1;
+    }
+
+
     if (VIR_REALLOC_N(def->controllers, def->ncontrollers+1) < 0) {
         VIR_FREE(cont);
         virReportOOMError();
@@ -4839,15 +4849,18 @@ static int virDomainDefMaybeAddVirtioSerialController(virDomainDefPtr def)
 {
     /* Look for any virtio serial device */
     int i;
+
     for (i = 0 ; i < def->nchannels ; i++) {
         virDomainChrDefPtr channel = def->channels[i];
 
         if (channel->targetType == VIR_DOMAIN_CHR_TARGET_TYPE_VIRTIO) {
-            /* Try to add a virtio serial controller with index 0 */
+            int idx = 0;
+            if (channel->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL)
+                idx = channel->info.addr.vioserial.controller;
+
             if (virDomainDefMaybeAddController(def,
-                    VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL, 0) < 0)
+                VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL, idx) < 0)
                 return -1;
-            break;
         }
     }
 

tests/qemuxml2argvdata/qemuxml2argv-channel-virtio.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefaults -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -device virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=4,bus=pci.0,addr=0x4 -device virtio-serial-pci,id=virtio-serial1,bus=pci.0,addr=0xa -hda /dev/HostVG/QEMUGuest1 -chardev pty,id=channel0 -device virtserialport,chardev=channel0,name=org.linux-kvm.port.0 -chardev pty,id=channel1 -device virtserialport,bus=virtio-serial1.0,nr=0,chardev=channel1,name=org.linux-kvm.port.foo -chardev pty,id=channel2 -device virtserialport,bus=virtio-serial1.0,nr=3,chardev=channel2,name=org.linux-kvm.port.bar -chardev pty,id=channel3 -device virtserialport,bus=virtio-serial0.0,nr=0,chardev=channel3,name=org.linux-kvm.port.wizz -chardev pty,id=channel4 -device virtserialport,bus=virtio-serial1.0,nr=4,chardev=channel4,name=org.linux-kvm.port.ooh -usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefaults -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -device virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=4,bus=pci.0,addr=0x4 -device virtio-serial-pci,id=virtio-serial1,bus=pci.0,addr=0xa -device virtio-serial-pci,id=virtio-serial2,bus=pci.0,addr=0x5 -hda /dev/HostVG/QEMUGuest1 -chardev pty,id=channel0 -device virtserialport,bus=virtio-serial0.0,nr=0,chardev=channel0,name=org.linux-kvm.port.0 -chardev pty,id=channel1 -device virtserialport,bus=virtio-serial1.0,nr=0,chardev=channel1,name=org.linux-kvm.port.foo -chardev pty,id=channel2 -device virtserialport,bus=virtio-serial1.0,nr=3,chardev=channel2,name=org.linux-kvm.port.bar -chardev pty,id=channel3 -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=channel3,name=org.linux-kvm.port.wizz -chardev pty,id=channel4 -device virtserialport,bus=virtio-serial1.0,nr=4,chardev=channel4,name=org.linux-kvm.port.ooh -chardev pty,id=channel5 -device virtserialport,bus=virtio-serial2.0,nr=0,chardev=channel5,name=org.linux-kvm.port.lla -usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3

tests/qemuxml2argvdata/qemuxml2argv-channel-virtio.xml

@@ -43,5 +43,9 @@
       <target type='virtio' name='org.linux-kvm.port.ooh'/>
       <address type='virtio-serial' controller='1' bus='0'/>
     </channel>
+    <channel type='pty'>
+      <target type='virtio' name='org.linux-kvm.port.lla'/>
+      <address type='virtio-serial' controller='2' bus='0'/>
+    </channel>
   </devices>
 </domain>