[mirror_ubuntu-hirsute-kernel.git] / samples / bpf / syscall_tp_kern.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2017 Facebook
 */
#include <uapi/linux/bpf.h>
#include <bpf/bpf_helpers.h>

struct syscalls_enter_open_args {
	unsigned long long unused;
	long syscall_nr;
	long filename_ptr;
	long flags;
	long mode;
};

struct syscalls_exit_open_args {
	unsigned long long unused;
	long syscall_nr;
	long ret;
};

struct {
	__uint(type, BPF_MAP_TYPE_ARRAY);
	__type(key, u32);
	__type(value, u32);
	__uint(max_entries, 1);
} enter_open_map SEC(".maps");

struct {
	__uint(type, BPF_MAP_TYPE_ARRAY);
	__type(key, u32);
	__type(value, u32);
	__uint(max_entries, 1);
} exit_open_map SEC(".maps");

static __always_inline void count(void *map)
{
	u32 key = 0;
	u32 *value, init_val = 1;

	value = bpf_map_lookup_elem(map, &key);
	if (value)
		*value += 1;
	else
		bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
}

SEC("tracepoint/syscalls/sys_enter_open")
int trace_enter_open(struct syscalls_enter_open_args *ctx)
{
	count(&enter_open_map);
	return 0;
}

SEC("tracepoint/syscalls/sys_enter_openat")
int trace_enter_open_at(struct syscalls_enter_open_args *ctx)
{
	count(&enter_open_map);
	return 0;
}

SEC("tracepoint/syscalls/sys_exit_open")
int trace_enter_exit(struct syscalls_exit_open_args *ctx)
{
	count(&exit_open_map);
	return 0;
}

SEC("tracepoint/syscalls/sys_exit_openat")
int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
{
	count(&exit_open_map);
	return 0;
}
Commit	Line	Data
25763b3c	1	// SPDX-License-Identifier: GPL-2.0-only
1da236b6	2	/* Copyright (c) 2017 Facebook
1da236b6 YS	3	*/
1da236b6 YS	4	#include <uapi/linux/bpf.h>
7cf245a3	5	#include <bpf/bpf_helpers.h>
1da236b6 YS	6
	7	struct syscalls_enter_open_args {
	8	unsigned long long unused;
	9	long syscall_nr;
	10	long filename_ptr;
	11	long flags;
	12	long mode;
	13	};
	14
	15	struct syscalls_exit_open_args {
	16	unsigned long long unused;
	17	long syscall_nr;
	18	long ret;
	19	};
	20
f0c328f8 DL	21	struct {
	22	__uint(type, BPF_MAP_TYPE_ARRAY);
	23	__type(key, u32);
	24	__type(value, u32);
	25	__uint(max_entries, 1);
	26	} enter_open_map SEC(".maps");
1da236b6	27
f0c328f8 DL	28	struct {
	29	__uint(type, BPF_MAP_TYPE_ARRAY);
	30	__type(key, u32);
	31	__type(value, u32);
	32	__uint(max_entries, 1);
	33	} exit_open_map SEC(".maps");
1da236b6 YS	34
	35	static __always_inline void count(void *map)
	36	{
	37	u32 key = 0;
	38	u32 *value, init_val = 1;
	39
	40	value = bpf_map_lookup_elem(map, &key);
	41	if (value)
	42	*value += 1;
	43	else
	44	bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
	45	}
	46
	47	SEC("tracepoint/syscalls/sys_enter_open")
	48	int trace_enter_open(struct syscalls_enter_open_args *ctx)
	49	{
fe330089 DL	50	count(&enter_open_map);
	51	return 0;
	52	}
	53
	54	SEC("tracepoint/syscalls/sys_enter_openat")
	55	int trace_enter_open_at(struct syscalls_enter_open_args *ctx)
	56	{
	57	count(&enter_open_map);
1da236b6 YS	58	return 0;
	59	}
	60
	61	SEC("tracepoint/syscalls/sys_exit_open")
	62	int trace_enter_exit(struct syscalls_exit_open_args *ctx)
	63	{
fe330089 DL	64	count(&exit_open_map);
	65	return 0;
	66	}
	67
	68	SEC("tracepoint/syscalls/sys_exit_openat")
	69	int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
	70	{
	71	count(&exit_open_map);
1da236b6 YS	72	return 0;
1da236b6 YS	73	}