tcp: Move timestamps from inetpeer to metrics cache.
With help from Lin Ming.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index e9312a8..d406bf7 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -209,22 +209,8 @@
}
if (tcp_death_row.sysctl_tw_recycle &&
- !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr) {
- struct inet_peer *peer = rt_get_peer(rt, fl4->daddr);
- /*
- * VJ's idea. We save last timestamp seen from
- * the destination in peer table, when entering state
- * TIME-WAIT * and initialize rx_opt.ts_recent from it,
- * when trying new connection.
- */
- if (peer) {
- inet_peer_refcheck(peer);
- if ((u32)get_seconds() - peer->tcp_ts_stamp <= TCP_PAWS_MSL) {
- tp->rx_opt.ts_recent_stamp = peer->tcp_ts_stamp;
- tp->rx_opt.ts_recent = peer->tcp_ts;
- }
- }
- }
+ !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr)
+ tcp_fetch_timewait_stamp(sk, &rt->dst);
inet->inet_dport = usin->sin_port;
inet->inet_daddr = daddr;
@@ -1375,7 +1361,6 @@
isn = cookie_v4_init_sequence(sk, skb, &req->mss);
req->cookie_ts = tmp_opt.tstamp_ok;
} else if (!isn) {
- struct inet_peer *peer = NULL;
struct flowi4 fl4;
/* VJ's idea. We save last timestamp seen
@@ -1390,12 +1375,8 @@
if (tmp_opt.saw_tstamp &&
tcp_death_row.sysctl_tw_recycle &&
(dst = inet_csk_route_req(sk, &fl4, req, want_cookie)) != NULL &&
- fl4.daddr == saddr &&
- (peer = rt_get_peer((struct rtable *)dst, fl4.daddr)) != NULL) {
- inet_peer_refcheck(peer);
- if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL &&
- (s32)(peer->tcp_ts - req->ts_recent) >
- TCP_PAWS_WINDOW) {
+ fl4.daddr == saddr) {
+ if (!tcp_peer_is_proven(req, dst, true)) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
goto drop_and_release;
}
@@ -1404,8 +1385,7 @@
else if (!sysctl_tcp_syncookies &&
(sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
(sysctl_max_syn_backlog >> 2)) &&
- (!peer || !peer->tcp_ts_stamp) &&
- !tcp_peer_is_proven(req, dst)) {
+ !tcp_peer_is_proven(req, dst, false)) {
/* Without syncookies last quarter of
* backlog is filled with destinations,
* proven to be alive.