ip6mr_cache_report
err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE);
ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT);
ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
ip6mr_cache_report(mrt, skb, true_vifi,
ip6mr_cache_report(mrt, skb, READ_ONCE(mrt->mroute_reg_vif_num),
static int ip6mr_cache_report(const struct mr_table *mrt, struct sk_buff *pkt,