ip6_mc_add_src
ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
ip6_mc_add_src(idev, group, omode, 1, source, 1);
err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
ip6_mc_add_src(idev, &mc->mca_addr, mode, 0, NULL, 0);