diff options
| author | Yousuk Seung <ysseung@google.com> | 2020-06-26 21:05:34 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-27 17:41:27 -0700 |
| commit | f00394ce6054e54319aefa51e4c495f9ebeb8669 (patch) | |
| tree | c72817d500875c8d9d0dd316f0e552615e7bae0e /net/ipv4/tcp_input.c | |
| parent | c634e34f6ebfb75259e6ce467523fd3adf30d3d2 (diff) | |
| download | linux-f00394ce6054e54319aefa51e4c495f9ebeb8669.tar.gz | |
tcp: count sacked packets in tcp_sacktag_state
Add sack_delivered to tcp_sacktag_state and count the number of sacked
and dsacked packets. This is pure refactor for future patches to improve
tracking delivered counts.
Signed-off-by: Yousuk Seung <ysseung@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 09bed29e3ef42..db61ea597e398 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1138,6 +1138,7 @@ struct tcp_sacktag_state { struct rate_sample *rate; int flag; unsigned int mss_now; + u32 sack_delivered; }; /* Check if skb is fully within the SACK block. In presence of GSO skbs, @@ -1259,6 +1260,7 @@ static u8 tcp_sacktag_one(struct sock *sk, state->flag |= FLAG_DATA_SACKED; tp->sacked_out += pcount; tp->delivered += pcount; /* Out-of-order packets delivered */ + state->sack_delivered += pcount; /* Lost marker hint past SACKed? Tweak RFC3517 cnt */ if (tp->lost_skb_hint && @@ -1685,6 +1687,7 @@ tcp_sacktag_write_queue(struct sock *sk, const struct sk_buff *ack_skb, if (found_dup_sack) { state->flag |= FLAG_DSACKING_ACK; tp->delivered++; /* A spurious retransmission is delivered */ + state->sack_delivered++; } /* Eliminate too old ACKs, but take into @@ -3586,6 +3589,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) sack_state.first_sackt = 0; sack_state.rate = &rs; + sack_state.sack_delivered = 0; /* We very likely will need to access rtx queue. */ prefetch(sk->tcp_rtx_queue.rb_node); |