Re: [libvirt] [PATCH] qemu: hotplug: Report error if we hit tray status timeout

On 03.05.2016 01:09, Cole Robinson wrote: > If we exceed the timeout waiting for the tray status to change, > we don't report an error. Fix it > --- > I hit this trying to eject floppy media for a win10 VM with F24 > qemu, but I didn't dig deeper to figure out _why_ it's timing out... > > src/qemu/qemu_hotplug.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c > index 03e5309..e5f8a38 100644 > --- a/src/qemu/qemu_hotplug.c > +++ b/src/qemu/qemu_hotplug.c > @@ -224,7 +224,13 @@ qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver, > goto error; > > while (disk->tray_status != VIR_DOMAIN_DISK_TRAY_OPEN) { > - if (virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT) != 0) > + int rc2 = virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT); > + if (rc2 == 1) { > + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", > + _("timed out waiting for " > + "disk tray status update")); > + } > + if (rc2 != 0) > goto error; > } > } while (rc < 0); > Huh, funny; I've just got to the same problem producing nearly the same patch. I'd rename rc2 to wait_rc and test it for begin greater than 0 instead of being exactly one. I know it's the same right now, but I think it's more solid.

And for the 'lost' event - I guess it's a qemu bug. While I was debugging, I ran 'query-block' monitor command and saw tray closed. So I've ran 'virsh update-device' which opens the tray and it timed out, just like in your case. So I ran 'query-block' again just to find that tray is now being reported open. So there clearly has been a state translation without qemu sending us corresponding event thus I'd call it a qemu bug.