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// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 3);
__type(key, __u32);
__type(value, __u64);
} arraymap SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 5);
__type(key, __u32);
__type(value, __u64);
} hashmap SEC(".maps");
struct callback_ctx {
int output;
};
u32 data_output = 0;
int use_array = 0;
static __u64
check_map_elem(struct bpf_map *map, __u32 *key, __u64 *val,
struct callback_ctx *data)
{
data->output += *val;
return 0;
}
SEC("tc")
int test_pkt_access(struct __sk_buff *skb)
{
struct callback_ctx data;
data.output = 0;
if (use_array)
bpf_for_each_map_elem(&arraymap, check_map_elem, &data, 0);
else
bpf_for_each_map_elem(&hashmap, check_map_elem, &data, 0);
data_output = data.output;
return 0;
}
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