On Thu, Sep 18, 2014 at 06:18:22AM -0400, John Ferlan wrote:
>
>
> On 09/18/2014 04:39 AM, Daniel P. Berrange wrote:
> > On Wed, Sep 17, 2014 at 03:07:47PM -0400, John Ferlan wrote:
> >> While doing some investigation for another bug I found that I could
> >> not qemu-attach to the process and got the following:
> >>
> >> error: Operation not supported: JSON monitor is required
> >>
> >> while running thru qemuProcessAttach. Since we can only get the data
> >> using the JSON parser and if the guest to be attached to doesn't have
> >> it we shouldn't just fail. See example in virsh qemu-attach for sample
> >> command that failed.
> >
> > It isn't simply qemu-attach that's affected. If you merely try to
> > start a guest normally with a QEMU that predates JSON support this
> > would fail too.
> >
> >> Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
> >> ---
> >>
> >> I also considered removing the call from qemuProcessAttach rather than
> >> this approach.
> >>
> >> src/qemu/qemu_monitor.c | 8 +++-----
> >> 1 file changed, 3 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
> >> index 8927dbb..4342088 100644
> >> --- a/src/qemu/qemu_monitor.c
> >> +++ b/src/qemu/qemu_monitor.c
> >> @@ -4112,11 +4112,9 @@ qemuMonitorGetIOThreads(qemuMonitorPtr mon,
> >> return -1;
> >> }
> >>
> >> - if (!mon->json) {
> >> - virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
> >> - _("JSON monitor is required"));
> >> - return -1;
> >> - }
> >> + /* Requires JSON to make the query */
> >> + if (!mon->json)
> >> + return 0;
> >
> > I think you need should do '*iothreads = NULL' for safety too.
> >
>
> OK with the following squashed in?
>
> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
> index 4342088..10f51c5 100644
> --- a/src/qemu/qemu_monitor.c
> +++ b/src/qemu/qemu_monitor.c
> @@ -4113,8 +4113,10 @@ qemuMonitorGetIOThreads(qemuMonitorPtr mon,
> }
>
> /* Requires JSON to make the query */
> - if (!mon->json)
> + if (!mon->json) {
> + *iothreads = NULL;
> return 0;
> + }
>
> return qemuMonitorJSONGetIOThreads(mon, iothreads);
> }
ACK
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list