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tcp: add TCPI_OPT_USEC_TS

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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 <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-10-20 12:57:48 +00:00 committed by David S. Miller
parent 614e8316aa
commit a77a0f5c7f
2 changed files with 3 additions and 0 deletions
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1
include/uapi/linux/tcp.h
View File

@ -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

2
net/ipv4/tcp.c
View File

@ -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,