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Add USB option capability 

To avoid the collision for creating USB controllers in machine->init()
and -device xx command line, it needs to set usb=off to avoid one USB
controller created in machine->init(). So that libvirt can use -device
or -usb to create USB controller sucessfully.
So QEMU_CAPS_MACHINE_USB_OPT capability is added, and it is for QEMU
v1.3.0 onwards which supports USB option.

Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
This commit is contained in:
Li Zhang 2013-04-07 16:31:57 +08:00 committed by Daniel P. Berrange
parent 6528b7044f
commit a6e37aedff
6 changed files with 49 additions and 0 deletions
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9
src/qemu/qemu_capabilities.c
View File

@ -216,6 +216,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
"ipv6-migration", /* 135 */
"machine-opt",
"machine-usb-opt",
);
struct _virQEMUCaps {
@ -1078,6 +1079,10 @@ virQEMUCapsComputeCmdFlags(const char *help,
if (strstr(help, "-machine"))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_OPT);
/* USB option is supported v1.3.0 onwards */
if (qemuCaps->version >= 1003000)
virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_USB_OPT);
/*
* Handling of -incoming arg with varying features
* -incoming tcp (kvm >= 79, qemu >= 0.10.0)
@ -2435,6 +2440,10 @@ virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps,
virQEMUCapsInitQMPBasic(qemuCaps);
/* USB option is supported v1.3.0 onwards */
if (qemuCaps->version >= 1003000)
virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_USB_OPT);
if (!(archstr = qemuMonitorGetTargetArch(mon)))
goto cleanup;

1
src/qemu/qemu_capabilities.h
View File

@ -176,6 +176,7 @@ enum virQEMUCapsFlags {
QEMU_CAPS_SCSI_MEGASAS = 134, /* -device megasas */
QEMU_CAPS_IPV6_MIGRATION = 135, /* -incoming [::] */
QEMU_CAPS_MACHINE_OPT = 136, /* -machine xxxx*/
QEMU_CAPS_MACHINE_USB_OPT = 137, /* -machine xxx,usb=on/off */
QEMU_CAPS_LAST, /* this must always be the last item */
};

6
src/qemu/qemu_command.c
View File

@ -5257,6 +5257,12 @@ qemuBuildMachineArgStr(virCommandPtr cmd,
virCommandAddArg(cmd, "-machine");
virBufferAdd(&buf, def->os.machine, -1);
/* To avoid the collision of creating USB controllers when calling
* machine->init in QEMU, it needs to set usb=off
*/
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_USB_OPT))
virBufferAsprintf(&buf, ",usb=off");
if (def->mem.dump_core) {
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",

5
tests/qemuxml2argvdata/qemuxml2argv-machine-usb-opt.args Normal file
View File

@ -0,0 +1,5 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu \
-S -machine pc,usb=off -m 214 -smp 1 -nographic \
-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb \
-hda /dev/HostVG/QEMUGuest1 -net none -serial \
none -parallel none

26
tests/qemuxml2argvdata/qemuxml2argv-machine-usb-opt.xml Normal file
View File

@ -0,0 +1,26 @@
<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'>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'/>
<memballoon model='virtio'/>
</devices>
</domain>

2
tests/qemuxml2argvtest.c
View File

@ -369,6 +369,8 @@ mymain(void)
QEMU_CAPS_DUMP_GUEST_CORE);
DO_TEST_FAILURE("machine-core-on", NONE);
DO_TEST_FAILURE("machine-core-on", QEMU_CAPS_MACHINE_OPT);
DO_TEST("machine-usb-opt", QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_MACHINE_USB_OPT);
DO_TEST("boot-cdrom", NONE);
DO_TEST("boot-network", NONE);
DO_TEST("boot-floppy", NONE);