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Re: [libvirt] [PATCHv2 0/2] Support setting the 'removable' flag for USB disks



27/08/13 14:40, Peter Krempa wrote:
> On 08/23/13 12:38, Fred A. Kemp wrote:
>> From: "Fred A. Kemp" <anonym riseup net>
>>
>> The commit message of patch #2 explains the purpose of this patch set.
>> A review would be greatly appreciated!
>>
>> Note that I've only added the new capability for usb-storage.removable
>> to the qemu help tests of qemu(-kvm) version 1.2.0, since that's what I
>> had easily available to get the output of `-device usb-storage,?` from.
>> I hope that's not an issue, otherwise, is there a way to obtain these
>> outputs without having to hunt down and install all supported versions?
>>
>> Previous submissions of this patch set to this list:
>> http://www.redhat.com/archives/libvir-list/2013-March/msg01051.html
>> http://www.redhat.com/archives/libvir-list/2013-May/msg02039.html
>> https://www.redhat.com/archives/libvir-list/2013-July/msg01635.html
>> https://www.redhat.com/archives/libvir-list/2013-August/msg00581.html
>>
>> Fred A. Kemp (2):
>>   qemu: Add capability flag for usb-storage
>>   qemu: Support setting the 'removable' flag for USB disks
>>
> 
> This patchset unfortunately breaks the recently added qemuhotplugtest:
> 
> 14) hotplug-base ATTACH disk-usb                                      ... libvirt: QEMU Driver error : unsupported configuration: This QEMU doesn't support '-device usb-storage'
> FAILED
> 15) hotplug-base DETACH disk-usb                                      ... libvirt: QEMU Driver error : operation failed: disk sdq not found
> FAILED
> 16) hotplug-base ATTACH disk-usb                                      ... libvirt: QEMU Driver error : unsupported configuration: This QEMU doesn't support '-device usb-storage'
> FAILED
> 17) hotplug-base DETACH disk-usb                                      ... domain XML should not match the expected result
> libvirt: QEMU Driver error : operation failed: disk sdq not found
> FAILED
> 18) hotplug-base DETACH disk-usb                                      ... libvirt: QEMU Driver error : operation failed: disk sdq not found
> FAILED

After a two minute investigation of this new test, I threw in the
following fix which *seemingly* does the trick (i.e. I see no test
failures any more):

--- a/tests/qemuhotplugtest.c
+++ b/tests/qemuhotplugtest.c
@@ -78,6 +78,7 @@ qemuHotplugCreateObjects(virDomainXMLOptionPtr xmlopt,
     /* for attach & detach qemu must support -device */
     virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_DRIVE);
     virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_DEVICE);
+    virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE);
     virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_NET_NAME);
     virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_VIRTIO_SCSI);
     if (event)


I'm very time constrained at the moment so I didn't have time to read
the sources in detail, so the above fix is based on "pattern matching"
only. If the fix looks good any way, it should be fixup'ed into my patch #1.

I'm a bit confused with the process now, as my previous patches were
ACKed but not pushed. Should send a new patchset?

Cheers!


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