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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 1);
__type(key, int);
__type(value, long);
} hash1 SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 1);
__type(key, int);
__type(value, long);
} hash2 SEC(".maps");
int pass1 = 0;
int pass2 = 0;
SEC("fentry/__htab_map_lookup_elem")
int BPF_PROG(on_lookup, struct bpf_map *map)
{
int key = 0;
if (map == (void *)&hash1) {
pass1++;
return 0;
}
if (map == (void *)&hash2) {
pass2++;
/* htab_map_gen_lookup() will inline below call
* into direct call to __htab_map_lookup_elem()
*/
bpf_map_lookup_elem(&hash2, &key);
return 0;
}
return 0;
}
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