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Re: [PATCH 02/29] tools: add a new xen logging daemon


  • To: Jason Andryuk <jandryuk@xxxxxxxxx>
  • From: Juergen Gross <jgross@xxxxxxxx>
  • Date: Thu, 2 Nov 2023 08:44:46 +0100
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  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Wei Liu <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>
  • Delivery-date: Thu, 02 Nov 2023 07:44:54 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 01.11.23 19:36, Jason Andryuk wrote:
On Wed, Nov 1, 2023 at 10:27 AM Juergen Gross <jgross@xxxxxxxx> wrote:

Add "xenlogd", a new logging daemon meant to support infrastructure
domains (e.g. xenstore-stubdom) to write log files in dom0.

As I understand it, your new daemon is a generic 9pfs backend, which
you use for logging.  I think naming it something like xen9pfsd would
more accurately describe its functionality.

Fine with me. I'll wait a little bit to see what others think.

For now only add the code needed for starting the daemon and
registering it with Xenstore via a new "/tool/xenlog/state" node by
writing the "running" state to it.

To support driver domain use cases, I think you want to use a relative
Xenstore path.  While this daemon is independent from libxl, it might
be easiest to use "libxl/xenlog/" ("libxl/xen9pfs/") to take advantage
of driver domains having a read-write "libxl/" directory.

You have a point here. And as it is libxl controlling the start of the
daemon, putting it under "libxl" is fine IMO.


Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

The code looks good to me.

Thanks,


Juergen

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