1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 Facebook
4 #include <uapi/linux/bpf.h>
5 #include <bpf/bpf_helpers.h>
7 struct syscalls_enter_open_args {
8 unsigned long long unused;
15 struct syscalls_exit_open_args {
16 unsigned long long unused;
21 struct bpf_map_def SEC("maps") enter_open_map = {
22 .type = BPF_MAP_TYPE_ARRAY,
23 .key_size = sizeof(u32),
24 .value_size = sizeof(u32),
28 struct bpf_map_def SEC("maps") exit_open_map = {
29 .type = BPF_MAP_TYPE_ARRAY,
30 .key_size = sizeof(u32),
31 .value_size = sizeof(u32),
35 static __always_inline void count(void *map)
38 u32 *value, init_val = 1;
40 value = bpf_map_lookup_elem(map, &key);
44 bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
47 SEC("tracepoint/syscalls/sys_enter_open")
48 int trace_enter_open(struct syscalls_enter_open_args *ctx)
50 count(&enter_open_map);
54 SEC("tracepoint/syscalls/sys_enter_openat")
55 int trace_enter_open_at(struct syscalls_enter_open_args *ctx)
57 count(&enter_open_map);
61 SEC("tracepoint/syscalls/sys_exit_open")
62 int trace_enter_exit(struct syscalls_exit_open_args *ctx)
64 count(&exit_open_map);
68 SEC("tracepoint/syscalls/sys_exit_openat")
69 int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
71 count(&exit_open_map);