• David Ahern's avatar
    net: vrf: Handle ipv6 multicast and link-local addresses · 9ff74384
    David Ahern authored
    IPv6 multicast and link-local addresses require special handling by the
    VRF driver:
    1. Rather than using the VRF device index and full FIB lookups,
       packets to/from these addresses should use direct FIB lookups based on
       the VRF device table.
    
    2. fail sends/receives on a VRF device to/from a multicast address
       (e.g, make ping6 ff02::1%<vrf> fail)
    
    3. move the setting of the flow oif to the first dst lookup and revert
       the change in icmpv6_echo_reply made in ca254490 ("net: Add VRF
       support to IPv6 stack"). Linklocal/mcast addresses require use of the
       skb->dev.
    
    With this change connections into and out of a VRF enslaved device work
    for multicast and link-local addresses work (icmp, tcp, and udp)
    e.g.,
    
    1. packets into VM with VRF config:
        ping6 -c3 fe80::e0:f9ff:fe1c:b974%br1
        ping6 -c3 ff02::1%br1
    
        ssh -6 fe80::e0:f9ff:fe1c:b974%br1
    
    2. packets going out a VRF enslaved device:
        ping6 -c3 fe80::18f8:83ff:fe4b:7a2e%eth1
        ping6 -c3 ff02::1%eth1
        ssh -6 root@fe80::18f8:83ff:fe4b:7a2e%eth1
    Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    9ff74384
ip6_route.h 6.04 KB