IPV4_DEVCONF_ALL_RO
(IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), attr) && \
(IPV4_DEVCONF_ALL_RO(net, attr) || \
(max(IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), attr), \
(IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 1 || \
(IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 2 || \
IPV4_DEVCONF_ALL_RO(net, FORWARDING) ? 1 : 2,
if (IPV4_DEVCONF_ALL_RO(net, BC_FORWARDING))
IPV4_DEVCONF_ALL_RO(net, MC_FORWARDING)) {