qemu: add -chardev dbus support

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_command.c

@@ -1444,6 +1444,10 @@ qemuBuildChardevStr(const virDomainChrSourceDef *dev,
         break;
 
     case VIR_DOMAIN_CHR_TYPE_DBUS:
+        virBufferAsprintf(&buf, "dbus,id=%s,name=%s", charAlias,
+                          dev->data.dbus.channel);
+        break;
+
     case VIR_DOMAIN_CHR_TYPE_NMDM:
     case VIR_DOMAIN_CHR_TYPE_LAST:
     default:

src/qemu/qemu_monitor_json.c

@@ -6812,6 +6812,15 @@ qemuMonitorJSONAttachCharDevGetProps(const char *chrID,
     }
 
     case VIR_DOMAIN_CHR_TYPE_DBUS:
+        backendType = "dbus";
+
+        if (virJSONValueObjectAdd(&backendData,
+                                  "s:name", chr->data.dbus.channel,
+                                  NULL) < 0)
+            return NULL;
+
+        break;
+
     case VIR_DOMAIN_CHR_TYPE_SPICEPORT:
     case VIR_DOMAIN_CHR_TYPE_PIPE:
     case VIR_DOMAIN_CHR_TYPE_STDIO:

tests/qemuxml2argvdata/graphics-dbus-chardev.args

@@ -0,0 +1,32 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
+/usr/bin/qemu-system-i386 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
+-machine pc,usb=off,dump-guest-core=off \
+-accel tcg \
+-m 214 \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-usb \
+-chardev dbus,id=charserial0,name=org.qemu.console.serial.0 \
+-device isa-serial,chardev=charserial0,id=serial0,index=1 \
+-display dbus,p2p=on \
+-device cirrus-vga,id=video0,bus=pci.0,addr=0x2 \
+-msg timestamp=on

tests/qemuxml2argvtest.c

@@ -1539,6 +1539,10 @@ mymain(void)
             QEMU_CAPS_DEVICE_CIRRUS_VGA, QEMU_CAPS_DISPLAY_DBUS);
     DO_TEST("graphics-dbus-audio",
             QEMU_CAPS_DEVICE_CIRRUS_VGA, QEMU_CAPS_DISPLAY_DBUS, QEMU_CAPS_AUDIODEV);
+    DO_TEST("graphics-dbus-chardev",
+            QEMU_CAPS_DEVICE_ISA_SERIAL,
+            QEMU_CAPS_DEVICE_CIRRUS_VGA,
+            QEMU_CAPS_DISPLAY_DBUS);
 
     DO_TEST_NOCAPS("input-usbmouse");
     DO_TEST_NOCAPS("input-usbtablet");