1 files changed, 41 insertions, 0 deletions
diff --git a/net/sched/sch_blackhole.c b/net/sched/sch_blackhole.c
new file mode 100644
index 000000000..a7f7667ae
--- /dev/null
+++ b/net/sched/sch_blackhole.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/sched/sch_blackhole.c	Black hole queue
+ *
+ * Authors:	Thomas Graf <tgraf@suug.ch>
+ *
+ * Note: Quantum tunneling is not supported.
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <net/pkt_sched.h>
+
+static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
+			     struct sk_buff **to_free)
+{
+	qdisc_drop(skb, sch, to_free);
+	return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
+}
+
+static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
+{
+	return NULL;
+}
+
+static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
+	.id		= "blackhole",
+	.priv_size	= 0,
+	.enqueue	= blackhole_enqueue,
+	.dequeue	= blackhole_dequeue,
+	.peek		= blackhole_dequeue,
+	.owner		= THIS_MODULE,
+};
+
+static int __init blackhole_init(void)
+{
+	return register_qdisc(&blackhole_qdisc_ops);
+}
+device_initcall(blackhole_init)