netdev - [PATCH iproute2 1/5] ip route: add support for TCP usec TS

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Message-ID: <20231204091911.1326130-2-edumazet@google.com>
Date: Mon,  4 Dec 2023 09:19:07 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: David Ahern <dsahern@...nel.org>, Stephen Hemminger <stephen@...workplumber.org>
Cc: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Neal Cardwell <ncardwell@...gle.com>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH iproute2 1/5] ip route: add support for TCP usec TS

linux-6.7 got support for TCP usec resolution timestamps,
using one bit in the features mask : RTAX_FEATURE_TCP_USEC_TS.

ip route add 10/8 ... features tcp_usec_ts

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 ip/iproute.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ip/iproute.c b/ip/iproute.c
index fdf1f9a9dd0a4b693516d0b29b12cd6463895317..73dbab48aa4533e2297a1b1dd43726b4b05466b9 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -351,6 +351,11 @@ static void print_rtax_features(FILE *fp, unsigned int features)
 		features &= ~RTAX_FEATURE_ECN;
 	}
 
+	if (features & RTAX_FEATURE_TCP_USEC_TS) {
+		print_null(PRINT_ANY, "tcp_usec_ts", "tcp_usec_ts ", NULL);
+		features &= ~RTAX_FEATURE_TCP_USEC_TS;
+	}
+
 	if (features)
 		print_0xhex(PRINT_ANY,
 			    "features", "%#llx ", of);
@@ -1349,6 +1354,8 @@ static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
 
 				if (strcmp(*argv, "ecn") == 0)
 					features |= RTAX_FEATURE_ECN;
+				else if (strcmp(*argv, "tcp_usec_ts") == 0)
+					features |= RTAX_FEATURE_TCP_USEC_TS;
 				else
 					invarg("\"features\" value not valid\n", *argv);
 				break;
-- 
2.43.0.rc2.451.g8631bc7472-goog