• Eric Dumazet's avatar
    net: Introduce sk_route_nocaps · a465419b
    Eric Dumazet authored
    TCP-MD5 sessions have intermittent failures, when route cache is
    invalidated. ip_queue_xmit() has to find a new route, calls
    sk_setup_caps(sk, &rt->u.dst), destroying the 
    sk->sk_route_caps &= ~NETIF_F_GSO_MASK
    that MD5 desperately try to make all over its way (from
    tcp_transmit_skb() for example)
    So we send few bad packets, and everything is fine when
    tcp_transmit_skb() is called again for this socket.
    Since ip_queue_xmit() is at a lower level than TCP-MD5, I chose to use a
    socket field, sk_route_nocaps, containing bits to mask on sk_route_caps.
    Reported-by: default avatarBhaskar Dutta <bhaskie@gmail.com>
    Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>