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virNetDevMacVLanTapSetup: Work around older systems

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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@redhat.com>
This commit is contained in:
Michal Privoznik 2015-12-12 08:05:17 +01:00
parent 034e47c338
commit ec93cc25ec
1 changed files with 8 additions and 0 deletions
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8
src/util/virnetdevmacvlan.c
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@ -334,10 +334,18 @@ virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr, bool multi
new_flags &= ~IFF_VNET_HDR;
}
# ifdef IFF_MULTI_QUEUE
if (multiqueue)
new_flags |= IFF_MULTI_QUEUE;
else
new_flags &= ~IFF_MULTI_QUEUE;
# else
if (multiqueue) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Multiqueue devices are not supported on this system"));
return -1;
}
# endif
if (new_flags != ifreq.ifr_flags) {
ifreq.ifr_flags = new_flags;