// 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_delete_elem") int BPF_PROG(on_delete, struct bpf_map *map) { int key = 0; if (map == (void *)&hash1) { pass1++; return 0; } if (map == (void *)&hash2) { pass2++; bpf_map_delete_elem(&hash2, &key); return 0; } return 0; }