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1// SPDX-License-Identifier: GPL-2.0-only2/* Copyright (c) 2017 Facebook3 */4#include <uapi/linux/bpf.h>5#include <bpf/bpf_helpers.h>6 7#if !defined(__aarch64__)8struct syscalls_enter_open_args {9	unsigned long long unused;10	long syscall_nr;11	long filename_ptr;12	long flags;13	long mode;14};15#endif16 17struct syscalls_exit_open_args {18	unsigned long long unused;19	long syscall_nr;20	long ret;21};22 23struct syscalls_enter_open_at_args {24	unsigned long long unused;25	long syscall_nr;26	long long dfd;27	long filename_ptr;28	long flags;29	long mode;30};31 32struct {33	__uint(type, BPF_MAP_TYPE_ARRAY);34	__type(key, u32);35	__type(value, u32);36	__uint(max_entries, 1);37} enter_open_map SEC(".maps");38 39struct {40	__uint(type, BPF_MAP_TYPE_ARRAY);41	__type(key, u32);42	__type(value, u32);43	__uint(max_entries, 1);44} exit_open_map SEC(".maps");45 46static __always_inline void count(void *map)47{48	u32 key = 0;49	u32 *value, init_val = 1;50 51	value = bpf_map_lookup_elem(map, &key);52	if (value)53		*value += 1;54	else55		bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);56}57 58#if !defined(__aarch64__)59SEC("tracepoint/syscalls/sys_enter_open")60int trace_enter_open(struct syscalls_enter_open_args *ctx)61{62	count(&enter_open_map);63	return 0;64}65#endif66 67SEC("tracepoint/syscalls/sys_enter_openat")68int trace_enter_open_at(struct syscalls_enter_open_at_args *ctx)69{70	count(&enter_open_map);71	return 0;72}73 74SEC("tracepoint/syscalls/sys_enter_openat2")75int trace_enter_open_at2(struct syscalls_enter_open_at_args *ctx)76{77	count(&enter_open_map);78	return 0;79}80 81#if !defined(__aarch64__)82SEC("tracepoint/syscalls/sys_exit_open")83int trace_enter_exit(struct syscalls_exit_open_args *ctx)84{85	count(&exit_open_map);86	return 0;87}88#endif89 90SEC("tracepoint/syscalls/sys_exit_openat")91int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)92{93	count(&exit_open_map);94	return 0;95}96 97SEC("tracepoint/syscalls/sys_exit_openat2")98int trace_enter_exit_at2(struct syscalls_exit_open_args *ctx)99{100	count(&exit_open_map);101	return 0;102}103