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 <d...@cumulusnetworks.com>
---
drivers/net/vrf.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index b3762822b653..1ce7420322ee 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -779,6 +779,25 @@ static int vrf_get_saddr(struct net_device *dev, struct
flowi4 *fl4)
return rc;
}
+static int vrf_rcv_finish(struct net *net, struct sock *sk, struct sk_buff
*skb)
+{
+ return 0;
+}
+
+static struct sk_buff *vrf_rcv_nfhook(u8 pf, unsigned int hook,
+ struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct net *net = dev_net(dev);
+
+ nf_reset(skb);
+
+ if (NF_HOOK(pf, hook, net, NULL, skb, dev, NULL, vrf_rcv_finish) < 0)
+ skb = NULL; /* kfree_skb(skb) handled by nf code */
+
+ return skb;
+}
+
#if IS_ENABLED(CONFIG_IPV6)
/* neighbor handling is done with actual device; do not want
* to flip skb->dev for those ndisc packets. This really fails
@@ -899,6 +918,7 @@ static struct sk_buff *vrf_ip6_rcv(struct net_device
*vrf_dev,
if (need_strict)
vrf_ip6_input_dst(skb, vrf_dev, orig_iif);
+ skb = vrf_rcv_nfhook(NFPROTO_IPV6, NF_INET_PRE_ROUTING, skb, vrf_dev);
out:
return skb;
}
@@ -929,6 +949,7 @@ static struct sk_buff *vrf_ip_rcv(struct net_device
*vrf_dev,
dev_queue_xmit_nit(skb, vrf_dev);
skb_pull(skb, skb->mac_len);
+ skb = vrf_rcv_nfhook(NFPROTO_IPV4, NF_INET_PRE_ROUTING, skb, vrf_dev);
out:
return skb;
}
--
2.1.4
