netdev - [PATCH iproute2-next] tc: cake: add cake

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Message-ID: <20251124150350.492522-1-toke@redhat.com>
Date: Mon, 24 Nov 2025 16:03:50 +0100
From: Toke Høiland-Jørgensen <toke@...hat.com>
To: David Ahern <dsahern@...il.com>,
	Stephen Hemminger <stephen@...workplumber.org>
Cc: cake@...ts.bufferbloat.net,
	netdev@...r.kernel.org,
	Jonas Köppeler <j.koeppeler@...berlin.de>
Subject: [PATCH iproute2-next] tc: cake: add cake_mq support

From: Jonas Köppeler <j.koeppeler@...berlin.de>

This adds support for the cake_mq variant of sch_cake to tc.

Signed-off-by: Jonas Köppeler <j.koeppeler@...berlin.de>
---
 include/uapi/linux/pkt_sched.h |  1 +
 tc/q_cake.c                    | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/pkt_sched.h b/include/uapi/linux/pkt_sched.h
index 15d1a37ac6d8..fb07a8898225 100644
--- a/include/uapi/linux/pkt_sched.h
+++ b/include/uapi/linux/pkt_sched.h
@@ -1036,6 +1036,7 @@ enum {
 	TCA_CAKE_STATS_DROP_NEXT_US,
 	TCA_CAKE_STATS_P_DROP,
 	TCA_CAKE_STATS_BLUE_TIMER_US,
+	TCA_CAKE_STATS_ACTIVE_QUEUES,
 	__TCA_CAKE_STATS_MAX
 };
 #define TCA_CAKE_STATS_MAX (__TCA_CAKE_STATS_MAX - 1)
diff --git a/tc/q_cake.c b/tc/q_cake.c
index e2b8de55e5a2..1c143e766888 100644
--- a/tc/q_cake.c
+++ b/tc/q_cake.c
@@ -525,7 +525,6 @@ static int cake_print_opt(const struct qdisc_util *qu, FILE *f, struct rtattr *o
 	    RTA_PAYLOAD(tb[TCA_CAKE_FWMARK]) >= sizeof(__u32)) {
 		fwmark = rta_getattr_u32(tb[TCA_CAKE_FWMARK]);
 	}
-
 	if (wash)
 		print_string(PRINT_FP, NULL, "wash ", NULL);
 	else
@@ -667,6 +666,11 @@ static int cake_print_xstats(const struct qdisc_util *qu, FILE *f,
 			   " /%8u\n", GET_STAT_U32(MAX_ADJLEN));
 	}
 
+	if (st[TCA_CAKE_STATS_ACTIVE_QUEUES])
+		print_uint(PRINT_ANY, "active_queues",
+			   " active queues: %25u\n",
+			   GET_STAT_U32(ACTIVE_QUEUES));
+
 	if (st[TCA_CAKE_STATS_AVG_NETOFF])
 		print_uint(PRINT_ANY, "avg_hdr_offset",
 			   " average network hdr offset: %12u\n\n",
@@ -827,3 +831,10 @@ struct qdisc_util cake_qdisc_util = {
 	.print_qopt	= cake_print_opt,
 	.print_xstats	= cake_print_xstats,
 };
+
+struct qdisc_util cake_mq_qdisc_util = {
+	.id		= "cake_mq",
+	.parse_qopt	= cake_parse_opt,
+	.print_qopt	= cake_print_opt,
+	.print_xstats	= cake_print_xstats,
+};
-- 
2.51.2