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qemu: report error on attempt to live change virtio-net queues

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This resolves:

  https://bugzilla.redhat.com/show_bug.cgi?id=1029732

The BZ asked for the capability to change the number of queues used by
a virtio-net device while the device is in use. Because the number of
queues can only be set at the time the device is created, that isn't
possible. However, libvirt also shouldn't be silently reporting
success when someone tries to change the number of queues. So this
patch flags that as an error (just as attempts to change any of the
other virtio-specific parameters already do).
This commit is contained in:
Laine Stump 2013-12-03 12:40:38 +02:00
parent a602e90bc1
commit 5e12641e0e
1 changed files with 2 additions and 1 deletions
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3
src/qemu/qemu_hotplug.c
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@ -1899,7 +1899,8 @@ qemuDomainChangeNet(virQEMUDriverPtr driver,
(olddev->driver.virtio.name != newdev->driver.virtio.name ||
olddev->driver.virtio.txmode != newdev->driver.virtio.txmode ||
olddev->driver.virtio.ioeventfd != newdev->driver.virtio.ioeventfd ||
olddev->driver.virtio.event_idx != newdev->driver.virtio.event_idx)) {
olddev->driver.virtio.event_idx != newdev->driver.virtio.event_idx ||
olddev->driver.virtio.queues != newdev->driver.virtio.queues)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("cannot modify virtio network device driver attributes"));
goto cleanup;