// SPDX-License-Identifier: GPL-2.0

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>

SEC("xdp")
int xdp_devmap(struct xdp_md *ctx)
{
        return ctx->egress_ifindex;
}

struct {
        __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
        __uint(max_entries, 1);
        __uint(key_size, sizeof(__u32));
        __array(values, int (void *));
} xdp_map SEC(".maps") = {
        .values = {
                [0] = (void *)&xdp_devmap,
        },
};

SEC("xdp")
int xdp_entry(struct xdp_md *ctx)
{
        bpf_tail_call(ctx, &xdp_map, 0);
        return 0;
}