30 lines
508 B
C
30 lines
508 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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SEC("xdp")
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int xdp_devmap(struct xdp_md *ctx)
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{
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return ctx->egress_ifindex;
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}
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struct {
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__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
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__uint(max_entries, 1);
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__uint(key_size, sizeof(__u32));
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__array(values, int (void *));
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} xdp_map SEC(".maps") = {
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.values = {
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[0] = (void *)&xdp_devmap,
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},
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};
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SEC("xdp")
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int xdp_entry(struct xdp_md *ctx)
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{
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bpf_tail_call(ctx, &xdp_map, 0);
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return 0;
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}
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