1 // SPDX-License-Identifier: GPL-2.0 2 #include <vmlinux.h> 3 #include <bpf/bpf_helpers.h> 4 5 struct { 6 __uint(type, BPF_MAP_TYPE_ARRAY); 7 __uint(max_entries, 1); 8 __type(key, __u32); 9 __type(value, __u64); 10 } array_map SEC(".maps"); 11 12 static __u64 13 check_array_elem(struct bpf_map *map, __u32 *key, __u64 *val, 14 void *data) 15 { 16 bpf_get_current_comm(key, sizeof(*key)); 17 return 0; 18 } 19 20 SEC("raw_tp/sys_enter") 21 int test_map_key_write(const void *ctx) 22 { 23 bpf_for_each_map_elem(&array_map, check_array_elem, NULL, 0); 24 return 0; 25 } 26 27 char _license[] SEC("license") = "GPL"; 28