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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-05-16 00:36:33 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-16 00:36:33 -0700 |
| commit | a465419b1febb603821f924805529cff89cafeed (patch) | |
| tree | 5131fa2dbf624ebeb6cf61bf4dc1bc9464fe0bbd /net/core/sock.c | |
| parent | 3b098e2d7c693796cc4dffb07caa249fc0f70771 (diff) | |
| download | op-kernel-dev-a465419b1febb603821f924805529cff89cafeed.zip op-kernel-dev-a465419b1febb603821f924805529cff89cafeed.tar.gz | |
net: Introduce sk_route_nocaps
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: Bhaskar Dutta <bhaskie@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 94c4aff..63530a0 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1231,6 +1231,7 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst) sk->sk_route_caps = dst->dev->features; if (sk->sk_route_caps & NETIF_F_GSO) sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE; + sk->sk_route_caps &= ~sk->sk_route_nocaps; if (sk_can_gso(sk)) { if (dst->header_len) { sk->sk_route_caps &= ~NETIF_F_GSO_MASK; |
