From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Wed, 7 Jun 2023 15:45:04 +0000 (+0300)
Subject: tc/taprio: print the offload xstats
X-Git-Tag: v6.5.0~33^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=559ffd9e21bf6d29d704cea3dbe38fbaac310f43;p=thirdparty%2Fiproute2.git

tc/taprio: print the offload xstats

When the kernel reports offload counters through TCA_STATS2 ->
TCA_STATS_APP for the taprio qdisc, decode and print them.

Usage:

 # Global stats
 $ tc -s qdisc show dev eth0 root
 # Per-tc stats
 $ tc -s class show dev eth0

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
---

diff --git a/tc/q_taprio.c b/tc/q_taprio.c
index bc29710c4..65d0a30bd 100644
--- a/tc/q_taprio.c
+++ b/tc/q_taprio.c
@@ -649,8 +649,32 @@ static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 	return 0;
 }
 
+static int taprio_print_xstats(struct qdisc_util *qu, FILE *f,
+			       struct rtattr *xstats)
+{
+	struct rtattr *tb[TCA_TAPRIO_OFFLOAD_STATS_MAX + 1], *nla;
+
+	if (!xstats)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_TAPRIO_OFFLOAD_STATS_MAX, xstats);
+
+	nla = tb[TCA_TAPRIO_OFFLOAD_STATS_WINDOW_DROPS];
+	if (nla)
+		print_lluint(PRINT_ANY, "window_drops", " window_drops %llu",
+			     rta_getattr_u64(nla));
+
+	nla = tb[TCA_TAPRIO_OFFLOAD_STATS_TX_OVERRUNS];
+	if (nla)
+		print_lluint(PRINT_ANY, "tx_overruns", " tx_overruns %llu",
+			     rta_getattr_u64(nla));
+
+	return 0;
+}
+
 struct qdisc_util taprio_qdisc_util = {
 	.id		= "taprio",
 	.parse_qopt	= taprio_parse_opt,
 	.print_qopt	= taprio_print_opt,
+	.print_xstats	= taprio_print_xstats,
 };