On 4/2/17 10:57 PM, Jack Ma wrote:
> diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
> index c0cc6aa..07168d4 100644
> --- a/net/ipv4/netfilter.c
> +++ b/net/ipv4/netfilter.c
> @@ -46,6 +46,14 @@ int ip_route_me_harder(struct net *net, struct sk_buff
> *skb, unsigned int addr_t
> fl4.flowi4_oif = l3mdev_master_ifindex(dev);
How does the above line (which is part of this block:
fl4.flowi4_oif = sk ? sk->sk_bound_dev_if : 0;
if (!fl4.flowi4_oif)
fl4.flowi4_oif = l3mdev_master_ifindex(dev);
) not work? The dst should be set on the skb at this point and the
device would reference the VRF.
> fl4.flowi4_mark = skb->mark;
> fl4.flowi4_flags = flags;
> +
> + /* Since we have already known this is vrf flow passed by
> + * mangle table, we wrap the oif with the master interface.
> + */
> + if (fl4.flowi4_oif == 0 && fl4.daddr && skb->dev &&
> + netif_index_is_l3_master(net, skb->dev->ifindex))
> + fl4.flowi4_oif = skb->dev->ifindex;
> +
> rt = ip_route_output_key(net, &fl4);
> if (IS_ERR(rt))
> return PTR_ERR(rt);
>
