From 4fbae7d83c98c30efcf0a2a2ac55fbb75ef5a1a5 Mon Sep 17 00:00:00 2001 From: Mahesh Bandewar Date: Fri, 16 Sep 2016 12:59:19 -0700 Subject: ipvlan: Introduce l3s mode In a typical IPvlan L3 setup where master is in default-ns and each slave is into different (slave) ns. In this setup egress packet processing for traffic originating from slave-ns will hit all NF_HOOKs in slave-ns as well as default-ns. However same is not true for ingress processing. All these NF_HOOKs are hit only in the slave-ns skipping them in the default-ns. IPvlan in L3 mode is restrictive and if admins want to deploy iptables rules in default-ns, this asymmetric data path makes it impossible to do so. This patch makes use of the l3_rcv() (added as part of l3mdev enhancements) to perform input route lookup on RX packets without changing the skb->dev and then uses nf_hook at NF_INET_LOCAL_IN to change the skb->dev just before handing over skb to L4. Signed-off-by: Mahesh Bandewar CC: David Ahern Reviewed-by: David Ahern Signed-off-by: David S. Miller --- drivers/net/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/Kconfig') diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 0c5415b..8768a62 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -149,6 +149,7 @@ config IPVLAN tristate "IP-VLAN support" depends on INET depends on IPV6 + depends on NET_L3_MASTER_DEV ---help--- This allows one to create virtual devices off of a main interface and packets will be delivered based on the dest L3 (IPv6/IPv4 addr) -- cgit v1.1