Resguardo inicial

linux-7.2.3/tools/testing/selftests/bpf/progs/tc_bpf2bpf.c

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+__noinline
+int subprog_tc(struct __sk_buff *skb)
+{
+	int ret = 1;
+
+	__sink(skb);
+	__sink(ret);
+	/* let verifier know that 'subprog_tc' can change pointers to skb->data */
+	bpf_skb_change_proto(skb, 0, 0);
+	return ret;
+}
+
+SEC("tc")
+int entry_tc(struct __sk_buff *skb)
+{
+	return subprog_tc(skb);
+}
+
+char __license[] SEC("license") = "GPL";