summaryrefslogtreecommitdiffstats
path: root/net/ipv6/syncookies.c
diff options
context:
space:
mode:
authorFlorian Westphal <fw@strlen.de>2009-04-19 09:43:48 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-20 02:25:26 -0700
commita0f82f64e26929776c58a5c93c2ecb38e3d82815 (patch)
tree8c39812fc6fc8133cc28944e38b44c941d8fa3ce /net/ipv6/syncookies.c
parent7eebb0b28f755e297d355a205bb04945b256db6b (diff)
downloadop-kernel-dev-a0f82f64e26929776c58a5c93c2ecb38e3d82815.zip
op-kernel-dev-a0f82f64e26929776c58a5c93c2ecb38e3d82815.tar.gz
syncookies: remove last_synq_overflow from struct tcp_sock
last_synq_overflow eats 4 or 8 bytes in struct tcp_sock, even though it is only used when a listening sockets syn queue is full. We can (ab)use rx_opt.ts_recent_stamp to store the same information; it is not used otherwise as long as a socket is in listen state. Move linger2 around to avoid splitting struct mtu_probe across cacheline boundary on 32 bit arches. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/syncookies.c')
-rw-r--r--net/ipv6/syncookies.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 711175e..8c25139 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -131,7 +131,7 @@ __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
int mssind;
const __u16 mss = *mssp;
- tcp_sk(sk)->last_synq_overflow = jiffies;
+ tcp_synq_overflow(sk);
for (mssind = 0; mss > msstab[mssind + 1]; mssind++)
;
@@ -175,7 +175,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
if (!sysctl_tcp_syncookies || !th->ack)
goto out;
- if (time_after(jiffies, tp->last_synq_overflow + TCP_TIMEOUT_INIT) ||
+ if (tcp_synq_no_recent_overflow(sk) ||
(mss = cookie_check(skb, cookie)) == 0) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED);
goto out;
OpenPOWER on IntegriCloud