• David Ahern's avatar
    net: l3mdev: Add hook in ip and ipv6 · 74b20582
    David Ahern authored
    Currently the VRF driver uses the rx_handler to switch the skb device
    to the VRF device. Switching the dev prior to the ip / ipv6 layer
    means the VRF driver has to duplicate IP/IPv6 processing which adds
    overhead and makes features such as retaining the ingress device index
    more complicated than necessary.
    This patch moves the hook to the L3 layer just after the first NF_HOOK
    for PRE_ROUTING. This location makes exposing the original ingress device
    trivial (next patch) and allows adding other NF_HOOKs to the VRF driver
    in the future.
    dev_queue_xmit_nit is exported so that the VRF driver can cycle the skb
    with the switched device through the packet taps to maintain current
    behavior (tcpdump can be used on either the vrf device or the enslaved
    Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
ipv6.h 7.81 KB