1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2017 Facebook
*/
#include <uapi/linux/bpf.h>
#include <bpf/bpf_helpers.h>
#if !defined(__aarch64__)
struct syscalls_enter_open_args {
unsigned long long unused;
long syscall_nr;
long filename_ptr;
long flags;
long mode;
};
#endif
struct syscalls_exit_open_args {
unsigned long long unused;
long syscall_nr;
long ret;
};
struct syscalls_enter_open_at_args {
unsigned long long unused;
long syscall_nr;
long long dfd;
long filename_ptr;
long flags;
long mode;
};
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);
}
#if !defined(__aarch64__)
SEC("tracepoint/syscalls/sys_enter_open")
int trace_enter_open(struct syscalls_enter_open_args *ctx)
{
count(&enter_open_map);
return 0;
}
#endif
SEC("tracepoint/syscalls/sys_enter_openat")
int trace_enter_open_at(struct syscalls_enter_open_at_args *ctx)
{
count(&enter_open_map);
return 0;
}
SEC("tracepoint/syscalls/sys_enter_openat2")
int trace_enter_open_at2(struct syscalls_enter_open_at_args *ctx)
{
count(&enter_open_map);
return 0;
}
#if !defined(__aarch64__)
SEC("tracepoint/syscalls/sys_exit_open")
int trace_enter_exit(struct syscalls_exit_open_args *ctx)
{
count(&exit_open_map);
return 0;
}
#endif
SEC("tracepoint/syscalls/sys_exit_openat")
int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
{
count(&exit_open_map);
return 0;
}
SEC("tracepoint/syscalls/sys_exit_openat2")
int trace_enter_exit_at2(struct syscalls_exit_open_args *ctx)
{
count(&exit_open_map);
return 0;
}
|
