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/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 75d1795..9e96b5f 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -277,22 +277,8 @@
rt = (struct rt6_info *) dst;
if (tcp_death_row.sysctl_tw_recycle &&
!tp->rx_opt.ts_recent_stamp &&
- ipv6_addr_equal(&rt->rt6i_dst.addr, &np->daddr)) {
- struct inet_peer *peer = rt6_get_peer(rt);
- /*
- * 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;
- }
- }
- }
+ ipv6_addr_equal(&rt->rt6i_dst.addr, &np->daddr))
+ tcp_fetch_timewait_stamp(sk, dst);
icsk->icsk_ext_hdr_len = 0;
if (np->opt)
@@ -1134,8 +1120,6 @@
treq->iif = inet6_iif(skb);
if (!isn) {
- struct inet_peer *peer = NULL;
-
if (ipv6_opt_accepted(sk, skb) ||
np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
@@ -1160,14 +1144,8 @@
*/
if (tmp_opt.saw_tstamp &&
tcp_death_row.sysctl_tw_recycle &&
- (dst = inet6_csk_route_req(sk, &fl6, req)) != NULL &&
- (peer = rt6_get_peer((struct rt6_info *)dst)) != NULL &&
- ipv6_addr_equal((struct in6_addr *)peer->daddr.addr.a6,
- &treq->rmt_addr)) {
- 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) {
+ (dst = inet6_csk_route_req(sk, &fl6, req)) != NULL) {
+ if (!tcp_peer_is_proven(req, dst, true)) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
goto drop_and_release;
}
@@ -1176,8 +1154,7 @@
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.