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tcp: Move timestamps from inetpeer to metrics cache.

Browse Source 
With help from Lin Ming.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-07-10 03:14:24 -07:00
parent 94334d5ed4
commit 81166dd6fa
9 changed files with 149 additions and 127 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
net/ipv6/route.c
View File

@@ -2348,13 +2348,11 @@ static int rt6_fill_node(struct net *net,
int iif, int type, u32 pid, u32 seq,
int prefix, int nowait, unsigned int flags)
{
const struct inet_peer *peer;
struct rtmsg *rtm;
struct nlmsghdr *nlh;
long expires;
u32 table;
struct neighbour *n;
u32 ts, tsage;
if (prefix) { /* user wants prefix routes only */
if (!(rt->rt6i_flags & RTF_PREFIX_RT)) {
@@ -2473,16 +2471,7 @@ static int rt6_fill_node(struct net *net,
else
expires = INT_MAX;
peer = NULL;
if (rt6_has_peer(rt))
peer = rt6_peer_ptr(rt);
ts = tsage = 0;
if (peer && peer->tcp_ts_stamp) {
ts = peer->tcp_ts;
tsage = get_seconds() - peer->tcp_ts_stamp;
}
if (rtnl_put_cacheinfo(skb, &rt->dst, 0, ts, tsage,
if (rtnl_put_cacheinfo(skb, &rt->dst, 0, 0, 0,
expires, rt->dst.error) < 0)
goto nla_put_failure;

33
net/ipv6/tcp_ipv6.c
View File

@@ -277,22 +277,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
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 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
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 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
*/
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 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
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.