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| author | Eric Dumazet <edumazet@google.com> | 2015-09-15 22:24:20 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-18 04:01:04 (GMT) |
| commit | 58d607d3e52f2b15902f58a1161da9fb3b0f6d47 (patch) | |
| tree | 1949d88eb7d541878079ddafa607c31017099349 /net/ipv6/tcp_ipv6.c | |
| parent | bbe8373138a1fe92160a18418e7298b4c0128ff1 (diff) | |
| download | linux-58d607d3e52f2b15902f58a1161da9fb3b0f6d47.tar.xz | |
tcp: provide skb->hash to synack packets
In commit b73c3d0e4f0e ("net: Save TX flow hash in sock and set in skbuf
on xmit"), Tom provided a l4 hash to most outgoing TCP packets.
We'd like to provide one as well for SYNACK packets, so that all packets
of a given flow share same txhash, to later enable bonding driver to
also use skb->hash to perform slave selection.
Note that a SYNACK retransmit shuffles the tx hash, as Tom did
in commit 265f94ff54d62 ("net: Recompute sk_txhash on negative routing
advice") for established sockets.
This has nice effect making TCP flows resilient to some kind of black
holes, even at connection establish phase.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 97d9314..f9c0e26 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1090,7 +1090,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, newsk->sk_v6_rcv_saddr = ireq->ir_v6_loc_addr; newsk->sk_bound_dev_if = ireq->ir_iif; - sk_set_txhash(newsk); + newsk->sk_txhash = tcp_rsk(req)->txhash; /* Now IPv6 options... |