[libvirt] [PATCH] qemu: Fix assignment of the default spicevmc channel name

[Jiri Denemark]

Make sure we only assign the default spicevmc channel name to spicevmc
virtio channels. Caused by commits 3269ee65 and 1133ee2b, which moved
the assignment from XML parsing code to QEMU but failed to keep the
logic.

https://bugzilla.redhat.com/show_bug.cgi?id=1179680

Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
 src/qemu/qemu_command.c                            |  4 ++-
 .../qemuxml2argv-channel-virtio-default.args       | 16 ++++++++++
 .../qemuxml2argv-channel-virtio-default.xml        | 36 ++++++++++++++++++++++
 tests/qemuxml2argvtest.c                           |  3 ++
 4 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.xml

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 2209cf6..9b06a49 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6427,7 +6427,9 @@ qemuBuildVirtioSerialPortDevStr(virDomainDefPtr def,
           virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_SPICEVMC))) {
         virBufferAsprintf(&buf, ",chardev=char%s,id=%s",
                           dev->info.alias, dev->info.alias);
-        if (dev->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL) {
+        if (dev->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL &&
+            (dev->source.type == VIR_DOMAIN_CHR_TYPE_SPICEVMC ||
+             dev->target.name)) {
             virBufferAsprintf(&buf, ",name=%s", dev->target.name
                               ? dev->target.name : "com.redhat.spice.0");
         }
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.args b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.args
new file mode 100644
index 0000000..7908445
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.args
@@ -0,0 +1,16 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults \
+-chardev socket,id=charmonitor,path=/tmp/test-monitor,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=readline \
+-no-acpi \
+-boot c \
+-device virtio-serial-pci,id=virtio-serial1,bus=pci.0,addr=0xa \
+-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 \
+-usb \
+-hda /dev/HostVG/QEMUGuest1 \
+-chardev pty,id=charchannel0 \
+-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0 \
+-chardev spicevmc,id=charchannel1,name=vdagent \
+-device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,\
+name=com.redhat.spice.0 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.xml b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.xml
new file mode 100644
index 0000000..74baded
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-default.xml
@@ -0,0 +1,36 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static' cpuset='1-4,8-20,525'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <controller type='virtio-serial' index='1'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <channel type='pty'>
+      <target type='virtio'/>
+    </channel>
+    <channel type="spicevmc">
+      <target type="virtio"/>
+    </channel>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index a212d30..4154601 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1110,6 +1110,9 @@ mymain(void)
     DO_TEST("channel-spicevmc-old",
             QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_SPICE, QEMU_CAPS_DEVICE_SPICEVMC);
+    DO_TEST("channel-virtio-default",
+            QEMU_CAPS_DEVICE, QEMU_CAPS_CHARDEV, QEMU_CAPS_NODEFCONFIG,
+            QEMU_CAPS_SPICE, QEMU_CAPS_CHARDEV_SPICEVMC);
 
     DO_TEST("smartcard-host",
             QEMU_CAPS_CHARDEV, QEMU_CAPS_DEVICE,
-- 
2.4.5