Cregit: Linux 6.18: tailcall_bpf2bpf

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Leon Huayra	125	93.28%	1	25.00%
Ilya Leoshkevich	6	4.48%	1	25.00%
Jiri Olsa	2	1.49%	1	25.00%
Daniel Borkmann	1	0.75%	1	25.00%
Total	134		4

// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_legacy.h"
#include "bpf_test_utils.h"

struct {
	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
	__uint(max_entries, 1);
	__uint(key_size, sizeof(__u32));
	__uint(value_size, sizeof(__u32));
} jmp_table SEC(".maps");

int count = 0;

static __noinline
int subprog_tail(struct __sk_buff *skb)
{
	bpf_tail_call_static(skb, &jmp_table, 0);
	return 0;
}

SEC("tc")
int entry(struct __sk_buff *skb)
{
	int ret = 1;

	clobber_regs_stack();

	count++;
	subprog_tail(skb);
	subprog_tail(skb);

	return ret;
}

char __license[] SEC("license") = "GPL";

tailcall_bpf2bpf_hierarchy1.c