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// 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;
}
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