提交 7c1c7308 编写于 作者: E Eric Dumazet 提交者: David S. Miller

tcp: do not pass timestamp to tcp_rack_detect_loss()

We can use tp->tcp_mstamp as it contains a recent timestamp.

This removes a call to skb_mstamp_get() from tcp_rack_reo_timeout()
Signed-off-by: NEric Dumazet <edumazet@google.com>
Acked-by: NSoheil Hassas Yeganeh <soheil@google.com>
Acked-by: NNeal Cardwell <ncardwell@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 69e996c5
...@@ -45,8 +45,7 @@ static bool tcp_rack_sent_after(const struct skb_mstamp *t1, ...@@ -45,8 +45,7 @@ static bool tcp_rack_sent_after(const struct skb_mstamp *t1,
* or tcp_time_to_recover()'s "Trick#1: the loss is proven" code path will * or tcp_time_to_recover()'s "Trick#1: the loss is proven" code path will
* make us enter the CA_Recovery state. * make us enter the CA_Recovery state.
*/ */
static void tcp_rack_detect_loss(struct sock *sk, const struct skb_mstamp *now, static void tcp_rack_detect_loss(struct sock *sk, u32 *reo_timeout)
u32 *reo_timeout)
{ {
struct tcp_sock *tp = tcp_sk(sk); struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb; struct sk_buff *skb;
...@@ -79,7 +78,7 @@ static void tcp_rack_detect_loss(struct sock *sk, const struct skb_mstamp *now, ...@@ -79,7 +78,7 @@ static void tcp_rack_detect_loss(struct sock *sk, const struct skb_mstamp *now,
* A packet is lost if its elapsed time is beyond * A packet is lost if its elapsed time is beyond
* the recent RTT plus the reordering window. * the recent RTT plus the reordering window.
*/ */
u32 elapsed = skb_mstamp_us_delta(now, u32 elapsed = skb_mstamp_us_delta(&tp->tcp_mstamp,
&skb->skb_mstamp); &skb->skb_mstamp);
s32 remaining = tp->rack.rtt_us + reo_wnd - elapsed; s32 remaining = tp->rack.rtt_us + reo_wnd - elapsed;
...@@ -115,7 +114,7 @@ void tcp_rack_mark_lost(struct sock *sk, const struct skb_mstamp *now) ...@@ -115,7 +114,7 @@ void tcp_rack_mark_lost(struct sock *sk, const struct skb_mstamp *now)
/* Reset the advanced flag to avoid unnecessary queue scanning */ /* Reset the advanced flag to avoid unnecessary queue scanning */
tp->rack.advanced = 0; tp->rack.advanced = 0;
tcp_rack_detect_loss(sk, now, &timeout); tcp_rack_detect_loss(sk, &timeout);
if (timeout) { if (timeout) {
timeout = usecs_to_jiffies(timeout + TCP_REO_TIMEOUT_MIN); timeout = usecs_to_jiffies(timeout + TCP_REO_TIMEOUT_MIN);
inet_csk_reset_xmit_timer(sk, ICSK_TIME_REO_TIMEOUT, inet_csk_reset_xmit_timer(sk, ICSK_TIME_REO_TIMEOUT,
...@@ -165,12 +164,10 @@ void tcp_rack_advance(struct tcp_sock *tp, u8 sacked, u32 end_seq, ...@@ -165,12 +164,10 @@ void tcp_rack_advance(struct tcp_sock *tp, u8 sacked, u32 end_seq,
void tcp_rack_reo_timeout(struct sock *sk) void tcp_rack_reo_timeout(struct sock *sk)
{ {
struct tcp_sock *tp = tcp_sk(sk); struct tcp_sock *tp = tcp_sk(sk);
struct skb_mstamp now;
u32 timeout, prior_inflight; u32 timeout, prior_inflight;
skb_mstamp_get(&now);
prior_inflight = tcp_packets_in_flight(tp); prior_inflight = tcp_packets_in_flight(tp);
tcp_rack_detect_loss(sk, &now, &timeout); tcp_rack_detect_loss(sk, &timeout);
if (prior_inflight != tcp_packets_in_flight(tp)) { if (prior_inflight != tcp_packets_in_flight(tp)) {
if (inet_csk(sk)->icsk_ca_state != TCP_CA_Recovery) { if (inet_csk(sk)->icsk_ca_state != TCP_CA_Recovery) {
tcp_enter_recovery(sk, false); tcp_enter_recovery(sk, false);
......
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