Re: xen 4.6 regression: xl create fails if domU have custom vifname

[Fabio Fantoni <fabio.fantoni@m2r.biz>]

Il 27/08/2015 16:46, Wei Liu ha scritto:
> On Thu, Aug 27, 2015 at 04:41:46PM +0200, Fabio Fantoni wrote:
>> Today trying xen 4.6.0-rc2 with all things needed for future production
>> server I found a regression: xl create fails if domU have custom vifname.
>> xl create test.cfg
>> Parsing config from test.cfg
>> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus:
>> /etc/xen/scripts/vif-bridge add [14581] exited with error status 1
>> libxl: error: libxl_device.c:1085:device_hotplug_child_death_cb: script: ip
>> link set vif14.0-emu name frc-0-0-emu failed
> This is the culprit.
>
> Did you do a clean install?
>
> You need to remove udev files in /etc. I should have mentioned this in
> testing instructions.
>
> Wei.

Sorry for my mistake I didn't remember to check /etc because the testing 
deb (with make debball) delete /etc files only if specified as 
considered config files.
Removing the udev file solves the problem.
Thanks.

>
>> libxl: error: libxl_create.c:1380:domcreate_attach_vtpms: unable to add nic
>> devices
>> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus:
>> /etc/xen/scripts/block remove [14615] exited with error status 1
>> libxl: error: libxl_device.c:1085:device_hotplug_child_death_cb: script:
>> /etc/xen/scripts/block failed; error detected.
>> libxl: error: libxl.c:1580:libxl__destroy_domid: non-existant domain 14
>> libxl: error: libxl.c:1538:domain_destroy_callback: unable to destroy guest
>> with domid 14
>> libxl: error: libxl.c:1465:domain_destroy_cb: destruction of domain 14
>> failed
>>
>>  From domU xl cfg:
>> vif=['bridge=xenbr0,mac=00:16:3e:dd:e3:f1,vifname=frc-0-0']
>>
>> Same domU removing only vifname is working.
>>
>> On production server with xen 4.4.2 or 4.5.1 domUs with vifname are working.
>>
>> I did a fast search without found the exact bug/regression cause.
>>
>> If you need more informations/tests tell me and I'll post them.
>>
>> Thanks for any reply and sorry for my bad english.