Re: [Qemu-devel] [PULL for-2.4 3/7] block/nfs: add support for setting debug level

[Kevin Wolf <kwolf@redhat.com>]

Am 07.07.2015 um 15:41 hat Peter Lieven geschrieben:
> Am 07.07.2015 um 15:24 schrieb Stefan Hajnoczi:
> >On Tue, Jul 7, 2015 at 1:08 PM, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> >>From: Peter Lieven <pl@kamp.de>
> >>
> >>upcoming libnfs versions will support logging debug messages. Add
> >>support for it in qemu through a per-drive option.
> >>
> >>Examples:
> >>  qemu -drive if=virtio,file=nfs://...,file.debug=2
> >>  qemu-img create -o debug=2 nfs://... 10G
> >>
> >>Signed-off-by: Peter Lieven <pl@kamp.de>
> >>Reviewed-by: Fam Zheng <famz@redhat.com>
> >>Message-id: 1436251847-16875-1-git-send-email-pl@kamp.de
> >>Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> >>---
> >>  block/nfs.c          | 28 ++++++++++++++++++++++++----
> >>  qapi/block-core.json | 20 ++++++++++++++++----
> >>  2 files changed, 40 insertions(+), 8 deletions(-)
> >Kevin has pointed out at the QAPI portion of this patch isn't ready
> >for prime time yet, so I will revert the patch and resend the pull
> >request.
> 
> Yes please, I was not aware that adding the QAPI part
> has such an impact. I would appreciate if someone who has
> more experience with the QAPI stuff would look at this and
> make a proposal how to handle the NFS (and also the iSCSI)
> case. I'm happy to look at the implementation then.

We should definitely come to a conclusion on this for 2.5. The same
problem doesn't only apply for NFS, but for all network protocols, and
this is one of the major reasons why blockdev-add isn't ready yet.

We'll need Eric for this discussion, though, and he'll only return from
vacation next Monday.

Kevin