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xen-devel
Re: [Xen-devel] [PATCH] tools: allow config file compatibility with new
I've seen a couple references to the tap:tapdisk syntax in the last few
days - For the record, the change responsible for this is 19346. It's not
related to the blktap2 code at all.
The point of making this change was to allow folks to specify a
blktap-like driver using qemu (with the syntax tap:ioemu).
The patch makes sense to me. I'd be very happy to be able to use the
older tap:<driver> syntax.
--Dutch
On Tue, 9 Jun 2009, Andre Przywara wrote:
Hi,
recently the format of the tap syntax in the config file changed to using a 4
part specifier (tap:tapdisk:<format>:<filename>) instead of the old 3-part
one (tap:<qcow>:<filename>).
This breaks compatibility with existing config files, a guest start will
throw a Python exception and will be aborted.
AFAICS currently tap:tapdisk is redundant, so the attached patch simply
catches the above mentioned exception and tries to parse the old format in
this case.
This will help our test work flow, because we can use the same config file
for different Xen tools versions.
What is the purpose of the new :tapdisk: specifier? Is it really redundant
(at least currently)?
Please cry out if there is something that I have missed, otherwise please
apply the patch.
If applying this patch is not an option, I would opt for a better error
message.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
Regards,
Andre.
--
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
Tel: +49 351 448 3567 12
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