Re: [libvirt] [PATCH 1/2] util: fallback to ioctl(SIOCBRADDBR) if netlink RTM_NEWLINK fails

commit fc7b23db switched from using ioctl(SIOCBRADDBR) to using a netlink RTM_NEWLINK message with an IFLA_INFO_KIND of "bridge", which is the more modern way to create a bridge. However, although older kernels (e.g. 2.6.32, in RHEL6/CentOS6) support creating *some* link types with RTM_NEWLINK, they don't support creating bridges, and there is no compile-time way to figure this out (since the "type" isn't an enum, but rather a character string). This patch moves the body of the SIOCBRADDBR version of virNetDevBridgeCreate() into a static function, calls the new function from the original, and also calls the new function from the RTM_NEWLINK version if the RTM_NEWLINK message generates an EOPNOTSUPP error. This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1252780 --- src/util/virnetdevbridge.c | 64 ++++++++++++++++++++++++++++++++-------------- 1 file changed, 45 insertions(+), 19 deletions(-)