1/* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
2/*
3 * cn_proc.h - process events connector
4 *
5 * Copyright (C) Matt Helsley, IBM Corp. 2005
6 * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
7 * Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com>
8 * Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of version 2.1 of the GNU Lesser General Public License
12 * as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it would be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17 */
18
19#ifndef _UAPICN_PROC_H
20#define _UAPICN_PROC_H
21
22#include <linux/types.h>
23
24/*
25 * Userspace sends this enum to register with the kernel that it is listening
26 * for events on the connector.
27 */
28enum proc_cn_mcast_op {
29 PROC_CN_MCAST_LISTEN = 1,
30 PROC_CN_MCAST_IGNORE = 2
31};
32
33#define PROC_EVENT_ALL (PROC_EVENT_FORK | PROC_EVENT_EXEC | PROC_EVENT_UID | \
34 PROC_EVENT_GID | PROC_EVENT_SID | PROC_EVENT_PTRACE | \
35 PROC_EVENT_COMM | PROC_EVENT_NONZERO_EXIT | \
36 PROC_EVENT_COREDUMP | PROC_EVENT_EXIT)
37
38/*
39 * If you add an entry in proc_cn_event, make sure you add it in
40 * PROC_EVENT_ALL above as well.
41 */
42enum proc_cn_event {
43 /* Use successive bits so the enums can be used to record
44 * sets of events as well
45 */
46 PROC_EVENT_NONE = 0x00000000,
47 PROC_EVENT_FORK = 0x00000001,
48 PROC_EVENT_EXEC = 0x00000002,
49 PROC_EVENT_UID = 0x00000004,
50 PROC_EVENT_GID = 0x00000040,
51 PROC_EVENT_SID = 0x00000080,
52 PROC_EVENT_PTRACE = 0x00000100,
53 PROC_EVENT_COMM = 0x00000200,
54 /* "next" should be 0x00000400 */
55 /* "last" is the last process event: exit,
56 * while "next to last" is coredumping event
57 * before that is report only if process dies
58 * with non-zero exit status
59 */
60 PROC_EVENT_NONZERO_EXIT = 0x20000000,
61 PROC_EVENT_COREDUMP = 0x40000000,
62 PROC_EVENT_EXIT = 0x80000000
63};
64
65struct proc_input {
66 enum proc_cn_mcast_op mcast_op;
67 enum proc_cn_event event_type;
68};
69
70static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
71{
72 return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL);
73}
74
75/*
76 * From the user's point of view, the process
77 * ID is the thread group ID and thread ID is the internal
78 * kernel "pid". So, fields are assigned as follow:
79 *
80 * In user space - In kernel space
81 *
82 * parent process ID = parent->tgid
83 * parent thread ID = parent->pid
84 * child process ID = child->tgid
85 * child thread ID = child->pid
86 */
87
88struct proc_event {
89 enum proc_cn_event what;
90 __u32 cpu;
91 __u64 __attribute__((aligned(8))) timestamp_ns;
92 /* Number of nano seconds since system boot */
93 union { /* must be last field of proc_event struct */
94 struct {
95 __u32 err;
96 } ack;
97
98 struct fork_proc_event {
99 __kernel_pid_t parent_pid;
100 __kernel_pid_t parent_tgid;
101 __kernel_pid_t child_pid;
102 __kernel_pid_t child_tgid;
103 } fork;
104
105 struct exec_proc_event {
106 __kernel_pid_t process_pid;
107 __kernel_pid_t process_tgid;
108 } exec;
109
110 struct id_proc_event {
111 __kernel_pid_t process_pid;
112 __kernel_pid_t process_tgid;
113 union {
114 __u32 ruid; /* task uid */
115 __u32 rgid; /* task gid */
116 } r;
117 union {
118 __u32 euid;
119 __u32 egid;
120 } e;
121 } id;
122
123 struct sid_proc_event {
124 __kernel_pid_t process_pid;
125 __kernel_pid_t process_tgid;
126 } sid;
127
128 struct ptrace_proc_event {
129 __kernel_pid_t process_pid;
130 __kernel_pid_t process_tgid;
131 __kernel_pid_t tracer_pid;
132 __kernel_pid_t tracer_tgid;
133 } ptrace;
134
135 struct comm_proc_event {
136 __kernel_pid_t process_pid;
137 __kernel_pid_t process_tgid;
138 char comm[16];
139 } comm;
140
141 struct coredump_proc_event {
142 __kernel_pid_t process_pid;
143 __kernel_pid_t process_tgid;
144 __kernel_pid_t parent_pid;
145 __kernel_pid_t parent_tgid;
146 } coredump;
147
148 struct exit_proc_event {
149 __kernel_pid_t process_pid;
150 __kernel_pid_t process_tgid;
151 __u32 exit_code, exit_signal;
152 __kernel_pid_t parent_pid;
153 __kernel_pid_t parent_tgid;
154 } exit;
155
156 } event_data;
157};
158
159#endif /* _UAPICN_PROC_H */
160