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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
struct inner_map {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 5);
__type(key, int);
__type(value, int);
} inner_map1 SEC(".maps");
struct outer_map {
__uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
__uint(max_entries, 3);
__type(key, int);
__array(values, struct inner_map);
} outer_map1 SEC(".maps") = {
.values = {
[2] = &inner_map1,
},
};
SEC("raw_tp/sys_enter")
int handle__sys_enter(void *ctx)
{
int outer_key = 2, inner_key = 3;
int *val;
void *map;
map = bpf_map_lookup_elem(&outer_map1, &outer_key);
if (!map)
return 1;
val = bpf_map_lookup_elem(map, &inner_key);
if (!val)
return 1;
if (*val == 1)
*val = 2;
return 0;
}
char _license[] SEC("license") = "GPL";
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