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net: vrf: Add support for PREROUTING rules on vrf device
Add support for PREROUTING rules with skb->dev set to the vrf device. INPUT rules are already allowed. Provides symmetry with the output path which allows POSTROUTING rules. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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8297f2d9ef
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1 changed files with 21 additions and 0 deletions
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@ -779,6 +779,25 @@ static int vrf_get_saddr(struct net_device *dev, struct flowi4 *fl4)
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return rc;
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}
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static int vrf_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
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{
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return 0;
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}
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static struct sk_buff *vrf_rcv_nfhook(u8 pf, unsigned int hook,
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struct sk_buff *skb,
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struct net_device *dev)
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{
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struct net *net = dev_net(dev);
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nf_reset(skb);
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if (NF_HOOK(pf, hook, net, NULL, skb, dev, NULL, vrf_rcv_finish) < 0)
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skb = NULL; /* kfree_skb(skb) handled by nf code */
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return skb;
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}
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#if IS_ENABLED(CONFIG_IPV6)
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/* neighbor handling is done with actual device; do not want
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* to flip skb->dev for those ndisc packets. This really fails
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@ -899,6 +918,7 @@ static struct sk_buff *vrf_ip6_rcv(struct net_device *vrf_dev,
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if (need_strict)
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vrf_ip6_input_dst(skb, vrf_dev, orig_iif);
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skb = vrf_rcv_nfhook(NFPROTO_IPV6, NF_INET_PRE_ROUTING, skb, vrf_dev);
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out:
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return skb;
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}
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@ -929,6 +949,7 @@ static struct sk_buff *vrf_ip_rcv(struct net_device *vrf_dev,
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dev_queue_xmit_nit(skb, vrf_dev);
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skb_pull(skb, skb->mac_len);
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skb = vrf_rcv_nfhook(NFPROTO_IPV4, NF_INET_PRE_ROUTING, skb, vrf_dev);
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out:
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return skb;
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}
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