From a77a0f5c7f23a8a4981a2a3ff47baa91ceaf1f53 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 20 Oct 2023 12:57:48 +0000 Subject: [PATCH] tcp: add TCPI_OPT_USEC_TS Add the ability to report in tcp_info.tcpi_options if a flow is using usec resolution in TCP TS val. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/uapi/linux/tcp.h | 1 + net/ipv4/tcp.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index d1d08da6331ab..8aa3916e14f6d 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -170,6 +170,7 @@ enum tcp_fastopen_client_fail { #define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ #define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ #define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ +#define TCPI_OPT_USEC_TS 64 /* usec timestamps */ /* * Sender's congestion state indicating normal or abnormal situations diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index b961364b4961c..a86d8200a1e86 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3760,6 +3760,8 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info) info->tcpi_options |= TCPI_OPT_ECN_SEEN; if (tp->syn_data_acked) info->tcpi_options |= TCPI_OPT_SYN_DATA; + if (tp->tcp_usec_ts) + info->tcpi_options |= TCPI_OPT_USEC_TS; info->tcpi_rto = jiffies_to_usecs(icsk->icsk_rto); info->tcpi_ato = jiffies_to_usecs(min_t(u32, icsk->icsk_ack.ato, -- 2.50.1