Re: [libvirt] [PATCH v2 3/3] qemu: Don't add -spice port=0 when no port is specified

If a <graphics type='spice'> has no port nor tlsPort set, the generated QEMU command line will contain -spice port=0. This is later going to be ignored by spice-server, but it's better not to add it at all in this situation. As an empty -spice is not allowed, we still need to append port=0 if we did not add any other argument. --- src/qemu/qemu_command.c | 11 +++++++++-- .../qemuxml2argv-graphics-spice-no-args.args | 21 +++++++++++++++++++++ .../qemuxml2argv-graphics-spice-no-args.xml | 22 ++++++++++++++++++++++ .../qemuxml2argv-video-virtio-gpu-spice-gl.args | 2 +- tests/qemuxml2argvtest.c | 2 ++ 5 files changed, 55 insertions(+), 3 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-no-args.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-no-args.xml

@@ -7234,7 +7234,14 @@ qemuBuildGraphicsSPICECommandLine(virQEMUDriverConfigPtr cfg, virBufferTrim(&opt, ",", -1); virCommandAddArg(cmd, "-spice"); - virCommandAddArgBuffer(cmd, &opt); + /* If we did not add any SPICE arguments, add a dummy 'port=0' one + * as -spice alone is not allowed on QEMU command line and will be + * ignored by libvirt

+ */ + if (virBufferUse(&opt) == 0) + virCommandAddArg(cmd, "port=0"); + else + virCommandAddArgBuffer(cmd, &opt); if (graphics->data.spice.keymap)