Hi David,
On Fri, 6 May 2016 18:49:40 -0700 David Ahern <d...@cumulusnetworks.com> wrote:
> +static bool ipv6_ndisc_frame(const struct sk_buff *skb)
> +{
> + const struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb->data;
> + size_t hlen = sizeof(*ipv6h);
> + bool rc = false;
> +
> + if (ipv6h->nexthdr == NEXTHDR_ICMP) {
> + const struct icmp6hdr *icmph;
> +
> + if (skb->len < hlen + sizeof(*icmph))
> + goto out;
> +
> + icmph = (struct icmp6hdr *)(skb->data + sizeof(*ipv6h));
> + switch (icmph->icmp6_type) {
Don't we need an additional pskb_may_pull here?
If I get it right, 'ipv6_rcv' only assures sizeof(ipv6hdr) to be in the
linear header (unless it's a NEXTHDR_HOP, which is not the case here).
> +static inline
> +struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
> +{
> + struct net_device *master = NULL;
> +
> + if (netif_is_l3_slave(skb->dev))
> + master = netdev_master_upper_dev_get_rcu(skb->dev);
> +
> + else if (netif_is_l3_master(skb->dev))
> + master = skb->dev;
> +
> + if (master && master->l3mdev_ops->l3mdev_l3_rcv)
> + skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
In the case where netif_is_l3_master(skb->dev) is true, can you explain
why we need to pass it through the l3mdev_l3_rcv callback again?
Regards,
Shmulik
