diff options
| author | Yuchung Cheng <ycheng@google.com> | 2018-04-17 23:18:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-19 13:05:16 -0400 |
| commit | feb5f2ec646483fb66f9ad7218b1aad2a93a2a5c (patch) | |
| tree | cc1b3d9495eeab4743e7086ff22a926854d79823 /net/ipv4 | |
| parent | e21db6f69a95b846ff04e31fe0a86004cbd000d7 (diff) | |
| download | linux-feb5f2ec646483fb66f9ad7218b1aad2a93a2a5c.tar.bz2 | |
tcp: export packets delivery info
Export data delivered and delivered with CE marks to
1) SNMP TCPDelivered and TCPDeliveredCE
2) getsockopt(TCP_INFO)
3) Timestamping API SOF_TIMESTAMPING_OPT_STATS
Note that for SCM_TSTAMP_ACK, the delivery info in
SOF_TIMESTAMPING_OPT_STATS is reported before the info
was fully updated on the ACK.
These stats help application monitor TCP delivery and ECN status
on per host, per connection, even per message level.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/proc.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 7 | ||||
| -rw-r--r-- | net/ipv4/tcp_input.c | 6 |
3 files changed, 13 insertions, 2 deletions
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c index a058de677e94..261b71d0ccc5 100644 --- a/net/ipv4/proc.c +++ b/net/ipv4/proc.c @@ -296,6 +296,8 @@ static const struct snmp_mib snmp4_net_list[] = { SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), + SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), + SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), SNMP_MIB_SENTINEL }; diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 5a5ce6da4792..4022073b0aee 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3167,6 +3167,8 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info) rate64 = tcp_compute_delivery_rate(tp); if (rate64) info->tcpi_delivery_rate = rate64; + info->tcpi_delivered = tp->delivered; + info->tcpi_delivered_ce = tp->delivered_ce; unlock_sock_fast(sk, slow); } EXPORT_SYMBOL_GPL(tcp_get_info); @@ -3180,7 +3182,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) u32 rate; stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) + - 5 * nla_total_size(sizeof(u32)) + + 7 * nla_total_size(sizeof(u32)) + 3 * nla_total_size(sizeof(u8)), GFP_ATOMIC); if (!stats) return NULL; @@ -3211,9 +3213,12 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) nla_put_u8(stats, TCP_NLA_RECUR_RETRANS, inet_csk(sk)->icsk_retransmits); nla_put_u8(stats, TCP_NLA_DELIVERY_RATE_APP_LMT, !!tp->rate_app_limited); nla_put_u32(stats, TCP_NLA_SND_SSTHRESH, tp->snd_ssthresh); + nla_put_u32(stats, TCP_NLA_DELIVERED, tp->delivered); + nla_put_u32(stats, TCP_NLA_DELIVERED_CE, tp->delivered_ce); nla_put_u32(stats, TCP_NLA_SNDQ_SIZE, tp->write_seq - tp->snd_una); nla_put_u8(stats, TCP_NLA_CA_STATE, inet_csk(sk)->icsk_ca_state); + return stats; } diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index b3bff9c20606..0396fb919b5d 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3499,12 +3499,16 @@ static void tcp_xmit_recovery(struct sock *sk, int rexmit) /* Returns the number of packets newly acked or sacked by the current ACK */ static u32 tcp_newly_delivered(struct sock *sk, u32 prior_delivered, int flag) { + const struct net *net = sock_net(sk); struct tcp_sock *tp = tcp_sk(sk); u32 delivered; delivered = tp->delivered - prior_delivered; - if (flag & FLAG_ECE) + NET_ADD_STATS(net, LINUX_MIB_TCPDELIVERED, delivered); + if (flag & FLAG_ECE) { tp->delivered_ce += delivered; + NET_ADD_STATS(net, LINUX_MIB_TCPDELIVEREDCE, delivered); + } return delivered; } |