54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018 Facebook */
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#include <stddef.h>
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#include <linux/bpf.h>
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#include <linux/types.h>
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#include <bpf/bpf_helpers.h>
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
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__uint(max_entries, 1);
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__uint(map_flags, 0);
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__uint(key_size, sizeof(__u32));
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/* must be sizeof(__u32) for map in map */
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__uint(value_size, sizeof(__u32));
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} mim_array SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
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__uint(max_entries, 1);
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__uint(map_flags, 0);
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__uint(key_size, sizeof(int));
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/* must be sizeof(__u32) for map in map */
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__uint(value_size, sizeof(__u32));
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} mim_hash SEC(".maps");
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SEC("xdp")
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int xdp_mimtest0(struct xdp_md *ctx)
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{
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int value = 123;
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int *value_p;
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int key = 0;
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void *map;
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map = bpf_map_lookup_elem(&mim_array, &key);
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if (!map)
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return XDP_DROP;
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bpf_map_update_elem(map, &key, &value, 0);
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value_p = bpf_map_lookup_elem(map, &key);
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if (!value_p || *value_p != 123)
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return XDP_DROP;
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map = bpf_map_lookup_elem(&mim_hash, &key);
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if (!map)
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return XDP_DROP;
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bpf_map_update_elem(map, &key, &value, 0);
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return XDP_PASS;
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}
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int _version SEC("version") = 1;
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char _license[] SEC("license") = "GPL";
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