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Re: [Xen-devel] [libvirt] [PATCH v2 5/7] virNetDevMacVLanTapSetup: Allow enabling of IFF_MULTI_QUEUE

On 14.12.2015 11:23, Ian Campbell wrote:
> Hello,
> On Thu, 2015-12-10 at 08:38 +0100, Michal Privoznik wrote:
>> Like we are doing for TUN/TAP devices, we should do the same for
>> macvtaps. Although, it's not as critical as in that case, we
>> should do it for the consistency.
>> Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
> This has triggered a build failure on amd64+i386+armhf within the Xen
> automated test framework (which uses Debian Wheezy as the build
> environment), I doubt it is in any way Xen specific though:
> util/virnetdevmacvlan.c: In function 'virNetDevMacVLanTapSetup':
> util/virnetdevmacvlan.c:338:26: error: 'IFF_MULTI_QUEUE' undeclared (first 
> use in this function)
> util/virnetdevmacvlan.c:338:26: note: each undeclared identifier is reported 
> only once for each function it appears in

this is supposed to be fixed by:

commit ec93cc25ecdad100a535cb52c08f7eaa3004b960
Author:     Michal Privoznik <mprivozn@xxxxxxxxxx>
AuthorDate: Sat Dec 12 08:05:17 2015 +0100
Commit:     Michal Privoznik <mprivozn@xxxxxxxxxx>
CommitDate: Sun Dec 13 08:35:46 2015 +0100

    virNetDevMacVLanTapSetup: Work around older systems
    Some older systems, e.g. RHEL-6 do not have IFF_MULTI_QUEUE flag
    which we use to enable multiqueue feature. Therefore one gets the
    following compile error there:
      CC     util/libvirt_util_la-virnetdevmacvlan.lo
    util/virnetdevmacvlan.c: In function 'virNetDevMacVLanTapSetup':
    util/virnetdevmacvlan.c:338: error: 'IFF_MULTI_QUEUE' undeclared (first use 
in this function)
    util/virnetdevmacvlan.c:338: error: (Each undeclared identifier is reported 
only once
    util/virnetdevmacvlan.c:338: error: for each function it appears in.)
    make[3]: *** [util/libvirt_util_la-virnetdevmacvlan.lo] Error 1
    So, whenever user wants us to enable the feature on such systems,
    we will just throw a runtime error instead.
    Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>


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