Commit bcfc7d33 authored by Thomas Winter's avatar Thomas Winter Committed by David S. Miller
Browse files

ipmr: vrf: Find VIFs using the actual device 



The skb->dev that is passed into ip_mr_input is
the loX device for VRFs. When we lookup a vif
for this dev, none is found as we do not create
vifs for loopbacks. Instead lookup a vif for the
actual device that the packet was received on,
eg the vlan.

Signed-off-by: default avatarThomas Winter <Thomas.Winter@alliedtelesis.co.nz>
cc: David Ahern <dsa@cumulusnetworks.com>
cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
cc: roopa <roopa@cumulusnetworks.com>
Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bafbb9c7

net/ipv4/ipmr.c

+16 −2
Original line number Diff line number Diff line
@@ -1980,6 +1980,20 @@ int ip_mr_input(struct sk_buff *skb) 
	struct net *net = dev_net(skb->dev);

	int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL;

	struct mr_table *mrt;

	struct net_device *dev;



	/* skb->dev passed in is the loX master dev for vrfs.

	 * As there are no vifs associated with loopback devices,

	 * get the proper interface that does have a vif associated with it.

	 */

	dev = skb->dev;

	if (netif_is_l3_master(skb->dev)) {

		dev = dev_get_by_index_rcu(net, IPCB(skb)->iif);

		if (!dev) {

			kfree_skb(skb);

			return -ENODEV;

		}

	}



	/* Packet is looped back after forward, it should not be

	 * forwarded second time, but still can be delivered locally.
@@ -2017,7 +2031,7 @@ int ip_mr_input(struct sk_buff *skb) 
	/* already under rcu_read_lock() */

	cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);

	if (!cache) {

		int vif = ipmr_find_vif(mrt, skb->dev);

		int vif = ipmr_find_vif(mrt, dev);



		if (vif >= 0)

			cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr,
@@ -2037,7 +2051,7 @@ int ip_mr_input(struct sk_buff *skb) 
		}



		read_lock(&mrt_lock);

		vif = ipmr_find_vif(mrt, skb->dev);

		vif = ipmr_find_vif(mrt, dev);

		if (vif >= 0) {

			int err2 = ipmr_cache_unresolved(mrt, vif, skb);

			read_unlock(&mrt_lock);

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