Andre Przywara
2009-Jun-09 09:42 UTC
[Xen-devel] [PATCH] tools: allow config file compatibility with new tap syntax
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@amd.com> Regards, Andre. -- Andre Przywara AMD-Operating System Research Center (OSRC), Dresden, Germany Tel: +49 351 448 3567 12 ----to satisfy European Law for business letters: Advanced Micro Devices GmbH Karl-Hammerschmidt-Str. 34, 85609 Dornach b. Muenchen Geschaeftsfuehrer: Thomas M. McCoy; Giuliano Meroni Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen Registergericht Muenchen, HRB Nr. 43632 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Dutch Meyer
2009-Jun-09 16:26 UTC
Re: [Xen-devel] [PATCH] tools: allow config file compatibility with new tap syntax
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@amd.com> > > Regards, > Andre. > > -- > Andre Przywara > AMD-Operating System Research Center (OSRC), Dresden, Germany > Tel: +49 351 448 3567 12 > ----to satisfy European Law for business letters: > Advanced Micro Devices GmbH > Karl-Hammerschmidt-Str. 34, 85609 Dornach b. Muenchen > Geschaeftsfuehrer: Thomas M. McCoy; Giuliano Meroni > Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen > Registergericht Muenchen, HRB Nr. 43632 >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel