linux-kernel - Re: [Qemu-devel] [PATCH 3/3] deal with guest panicked event

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 12 Jun 2012 10:21:45 -0300
From:	Luiz Capitulino <lcapitulino@...hat.com>
To:	"Daniel P. Berrange" <berrange@...hat.com>
Cc:	Wen Congyang <wency@...fujitsu.com>,
	kvm list <kvm@...r.kernel.org>,
	qemu-devel <qemu-devel@...gnu.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Avi Kivity <avi@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Gleb Natapov <gleb@...hat.com>
Subject: Re: [Qemu-devel] [PATCH 3/3] deal with guest panicked event

On Tue, 12 Jun 2012 13:40:45 +0100
"Daniel P. Berrange" <berrange@...hat.com> wrote:

> On Tue, Jun 12, 2012 at 09:35:04AM -0300, Luiz Capitulino wrote:
> > On Tue, 12 Jun 2012 14:55:37 +0800
> > Wen Congyang <wency@...fujitsu.com> wrote:
> > 
> > > >> +static void panicked_perform_action(void)
> > > >> +{
> > > >> +    switch(panicked_action) {
> > > >> +    case PANICKED_REPORT:
> > > >> +        panicked_mon_event("report");
> > > >> +        break;
> > > >> +
> > > >> +    case PANICKED_PAUSE:
> > > >> +        panicked_mon_event("pause");
> > > >> +        vm_stop(RUN_STATE_GUEST_PANICKED);
> > > >> +        break;
> > > >> +
> > > >> +    case PANICKED_QUIT:
> > > >> +        panicked_mon_event("quit");
> > > >> +        exit(0);
> > > >> +        break;
> > > >> +    }
> > > > 
> > > > Having the data argument is not needed/wanted. The mngt app can guess it if it
> > > > needs to know it, but I think it doesn't want to.
> > > 
> > > Libvirt will do something when the kernel is panicked, so it should know the action
> > > in qemu side.
> > 
> > But the action will be set by libvirt itself, no?
> 
> Sure, but the whole world isn't libvirt. If the process listening to the
> monitor is not the same as the process which launched the VM, then I
> think including the action is worthwhile. Besides, the way Wen has done
> this is identical to what we already do with QEVENT_WATCHDOG and I think
> it is desirable to keep consistency here.

That's right, I had forgotten about the WATCHDOG event. Maybe it would
make more sense to have this info in a query- command though, specially if
we plan to have a command to change that setting.

But I won't oppose having it in the event.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/