diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-06-20 09:02:19 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-23 08:47:33 +0400 |
| commit | 7586eceb0abc0ea1c2b023e3e5d4dfd4ff40930a (patch) | |
| tree | 79fc35a3afa23896ab3e6e00b4d9d1178bfee1df /net/ipv4/inet_connection_sock.c | |
| parent | 24ea818e305b92ad1fadcca015ae3b0c1222c497 (diff) | |
| download | linux-7586eceb0abc0ea1c2b023e3e5d4dfd4ff40930a.tar.xz | |
ipv4: tcp: dont cache output dst for syncookies
Don't cache output dst for syncookies, as this adds pressure on IP route
cache and rcu subsystem for no gain.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index f9ee7417f6a0..034ddbe42adf 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -368,17 +368,21 @@ EXPORT_SYMBOL(inet_csk_reset_keepalive_timer); struct dst_entry *inet_csk_route_req(struct sock *sk, struct flowi4 *fl4, - const struct request_sock *req) + const struct request_sock *req, + bool nocache) { struct rtable *rt; const struct inet_request_sock *ireq = inet_rsk(req); struct ip_options_rcu *opt = inet_rsk(req)->opt; struct net *net = sock_net(sk); + int flags = inet_sk_flowi_flags(sk) & ~FLOWI_FLAG_PRECOW_METRICS; + if (nocache) + flags |= FLOWI_FLAG_RT_NOCACHE; flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark, RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE, sk->sk_protocol, - inet_sk_flowi_flags(sk) & ~FLOWI_FLAG_PRECOW_METRICS, + flags, (opt && opt->opt.srr) ? opt->opt.faddr : ireq->rmt_addr, ireq->loc_addr, ireq->rmt_port, inet_sk(sk)->inet_sport); security_req_classify_flow(req, flowi4_to_flowi(fl4)); |