On 03/19/2012 06:20 AM, Peter Krempa wrote: > On 03/17/2012 05:33 PM, Eric Blake wrote: >> Taking an external snapshot of just one disk is atomic, without having >> to pause and resume the VM. This also paves the way for later patches >> to interact with the new qemu 'transaction' monitor command. >>
>> +++ b/src/qemu/qemu_driver.c
>> @@ -10279,6 +10295,12 @@ qemuDomainSnapshotCreateXML(virDomainPtr domain,
>> &vm, snap, flags)< 0)
>> goto cleanup;
>> } else if (!virDomainObjIsActive(vm)) {
>> + if (flags& VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) {
>> + qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
>> + _("atomic snapshots of inactive domains
>> not "
>> + "implemented yet"));
>> + goto cleanup;
>
> I wonder if we shouldn't add a error code for unimplemented
> functionality to differentiate it from unsupported configurations.
> (Well, but using a configuration that uses unimplemented functionality
> makes it an unsupported configuration basically, so I don't really mind)
This exact same error message is removed in 4/3, so I don't think it
quite matters _what_ we put here. I guess I could rebase the series to
swap 3/4 and 4/4, to avoid the churn.
>
>
>> + }
>> if (qemuDomainSnapshotCreateInactive(driver, vm, snap)< 0)
>> goto cleanup;
>> } else {
>
> ACK,
Thanks for the reviews. I may wait another day or two before actually
pushing, since I'm still in the middle of testing other snapshot-related
patches, just to make sure my tests don't turn up any other needed
last-minute changes to the ones I've posted so far.
--
Eric Blake ebl...@redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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