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Diffstat (limited to 'net/ipv4/tcp_metrics.c')
-rw-r--r--net/ipv4/tcp_metrics.c147
1 files changed, 4 insertions, 143 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 0f46e5fe31ad..9d0d4f39e42b 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -45,8 +45,6 @@ struct tcp_metrics_block {
struct inetpeer_addr tcpm_saddr;
struct inetpeer_addr tcpm_daddr;
unsigned long tcpm_stamp;
- u32 tcpm_ts;
- u32 tcpm_ts_stamp;
u32 tcpm_lock;
u32 tcpm_vals[TCP_METRIC_MAX_KERNEL + 1];
struct tcp_fastopen_metrics tcpm_fastopen;
@@ -123,8 +121,6 @@ static void tcpm_suck_dst(struct tcp_metrics_block *tm,
tm->tcpm_vals[TCP_METRIC_SSTHRESH] = dst_metric_raw(dst, RTAX_SSTHRESH);
tm->tcpm_vals[TCP_METRIC_CWND] = dst_metric_raw(dst, RTAX_CWND);
tm->tcpm_vals[TCP_METRIC_REORDERING] = dst_metric_raw(dst, RTAX_REORDERING);
- tm->tcpm_ts = 0;
- tm->tcpm_ts_stamp = 0;
if (fastopen_clear) {
tm->tcpm_fastopen.mss = 0;
tm->tcpm_fastopen.syn_loss = 0;
@@ -273,48 +269,6 @@ static struct tcp_metrics_block *__tcp_get_metrics_req(struct request_sock *req,
return tm;
}
-static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock *tw)
-{
- struct tcp_metrics_block *tm;
- struct inetpeer_addr saddr, daddr;
- unsigned int hash;
- struct net *net;
-
- if (tw->tw_family == AF_INET) {
- inetpeer_set_addr_v4(&saddr, tw->tw_rcv_saddr);
- inetpeer_set_addr_v4(&daddr, tw->tw_daddr);
- hash = ipv4_addr_hash(tw->tw_daddr);
- }
-#if IS_ENABLED(CONFIG_IPV6)
- else if (tw->tw_family == AF_INET6) {
- if (ipv6_addr_v4mapped(&tw->tw_v6_daddr)) {
- inetpeer_set_addr_v4(&saddr, tw->tw_rcv_saddr);
- inetpeer_set_addr_v4(&daddr, tw->tw_daddr);
- hash = ipv4_addr_hash(tw->tw_daddr);
- } else {
- inetpeer_set_addr_v6(&saddr, &tw->tw_v6_rcv_saddr);
- inetpeer_set_addr_v6(&daddr, &tw->tw_v6_daddr);
- hash = ipv6_addr_hash(&tw->tw_v6_daddr);
- }
- }
-#endif
- else
- return NULL;
-
- net = twsk_net(tw);
- hash ^= net_hash_mix(net);
- hash = hash_32(hash, tcp_metrics_hash_log);
-
- for (tm = rcu_dereference(tcp_metrics_hash[hash].chain); tm;
- tm = rcu_dereference(tm->tcpm_next)) {
- if (addr_same(&tm->tcpm_saddr, &saddr) &&
- addr_same(&tm->tcpm_daddr, &daddr) &&
- net_eq(tm_net(tm), net))
- break;
- }
- return tm;
-}
-
static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
struct dst_entry *dst,
bool create)
@@ -573,8 +527,7 @@ reset:
tp->snd_cwnd_stamp = tcp_time_stamp;
}
-bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
- bool paws_check, bool timestamps)
+bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst)
{
struct tcp_metrics_block *tm;
bool ret;
@@ -584,94 +537,10 @@ bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
rcu_read_lock();
tm = __tcp_get_metrics_req(req, dst);
- if (paws_check) {
- if (tm &&
- (u32)get_seconds() - tm->tcpm_ts_stamp < TCP_PAWS_MSL &&
- ((s32)(tm->tcpm_ts - req->ts_recent) > TCP_PAWS_WINDOW ||
- !timestamps))
- ret = false;
- else
- ret = true;
- } else {
- if (tm && tcp_metric_get(tm, TCP_METRIC_RTT) && tm->tcpm_ts_stamp)
- ret = true;
- else
- ret = false;
- }
- rcu_read_unlock();
-
- return ret;
-}
-
-void tcp_fetch_timewait_stamp(struct sock *sk, struct dst_entry *dst)
-{
- struct tcp_metrics_block *tm;
-
- rcu_read_lock();
- tm = tcp_get_metrics(sk, dst, true);
- if (tm) {
- struct tcp_sock *tp = tcp_sk(sk);
-
- if ((u32)get_seconds() - tm->tcpm_ts_stamp <= TCP_PAWS_MSL) {
- tp->rx_opt.ts_recent_stamp = tm->tcpm_ts_stamp;
- tp->rx_opt.ts_recent = tm->tcpm_ts;
- }
- }
- rcu_read_unlock();
-}
-EXPORT_SYMBOL_GPL(tcp_fetch_timewait_stamp);
-
-/* VJ's idea. Save last timestamp seen from this destination and hold
- * it at least for normal timewait interval to use for duplicate
- * segment detection in subsequent connections, before they enter
- * synchronized state.
- */
-bool tcp_remember_stamp(struct sock *sk)
-{
- struct dst_entry *dst = __sk_dst_get(sk);
- bool ret = false;
-
- if (dst) {
- struct tcp_metrics_block *tm;
-
- rcu_read_lock();
- tm = tcp_get_metrics(sk, dst, true);
- if (tm) {
- struct tcp_sock *tp = tcp_sk(sk);
-
- if ((s32)(tm->tcpm_ts - tp->rx_opt.ts_recent) <= 0 ||
- ((u32)get_seconds() - tm->tcpm_ts_stamp > TCP_PAWS_MSL &&
- tm->tcpm_ts_stamp <= (u32)tp->rx_opt.ts_recent_stamp)) {
- tm->tcpm_ts_stamp = (u32)tp->rx_opt.ts_recent_stamp;
- tm->tcpm_ts = tp->rx_opt.ts_recent;
- }
- ret = true;
- }
- rcu_read_unlock();
- }
- return ret;
-}
-
-bool tcp_tw_remember_stamp(struct inet_timewait_sock *tw)
-{
- struct tcp_metrics_block *tm;
- bool ret = false;
-
- rcu_read_lock();
- tm = __tcp_get_metrics_tw(tw);
- if (tm) {
- const struct tcp_timewait_sock *tcptw;
- struct sock *sk = (struct sock *) tw;
-
- tcptw = tcp_twsk(sk);
- if ((s32)(tm->tcpm_ts - tcptw->tw_ts_recent) <= 0 ||
- ((u32)get_seconds() - tm->tcpm_ts_stamp > TCP_PAWS_MSL &&
- tm->tcpm_ts_stamp <= (u32)tcptw->tw_ts_recent_stamp)) {
- tm->tcpm_ts_stamp = (u32)tcptw->tw_ts_recent_stamp;
- tm->tcpm_ts = tcptw->tw_ts_recent;
- }
+ if (tm && tcp_metric_get(tm, TCP_METRIC_RTT))
ret = true;
- }
+ else
+ ret = false;
rcu_read_unlock();
return ret;
@@ -791,14 +660,6 @@ static int tcp_metrics_fill_info(struct sk_buff *msg,
jiffies - tm->tcpm_stamp,
TCP_METRICS_ATTR_PAD) < 0)
goto nla_put_failure;
- if (tm->tcpm_ts_stamp) {
- if (nla_put_s32(msg, TCP_METRICS_ATTR_TW_TS_STAMP,
- (s32) (get_seconds() - tm->tcpm_ts_stamp)) < 0)
- goto nla_put_failure;
- if (nla_put_u32(msg, TCP_METRICS_ATTR_TW_TSVAL,
- tm->tcpm_ts) < 0)
- goto nla_put_failure;
- }
{
int n = 0;
generated by cgit (git 2.34.1) at 2024-05-22 14:54:37 +0000