• Ido Schimmel's avatar
    ipv6: fib: Provide offload indication using nexthop flags · fe400799
    Ido Schimmel authored
    IPv6 routes currently lack nexthop flags as in IPv4. This has several
    implications.
    
    In the forwarding path, it requires us to check the carrier state of the
    nexthop device and potentially ignore a linkdown route, instead of
    checking for RTNH_F_LINKDOWN.
    
    It also requires capable drivers to use the user facing IPv6-specific
    route flags to provide offload indication, instead of using the nexthop
    flags as in IPv4.
    
    Add nexthop flags to IPv6 routes in the 40 bytes hole and use it to
    provide offload indication instead of the RTF_OFFLOAD flag, which is
    removed while it's still not part of any official kernel release.
    
    In the near future we would like to use the field for the
    RTNH_F_{LINKDOWN,DEAD} flags, but this change is more involved and might
    not be ready in time for the current cycle.
    Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
    Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
    Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    fe400799
route.c 101 KB