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Matt Helsley9f460802005-11-07 00:59:16 -08001/*
2 * cn_proc.h - process events connector
3 *
4 * Copyright (C) Matt Helsley, IBM Corp. 2005
5 * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
Matt Helsley9f460802005-11-07 00:59:16 -08006 * Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com>
7 * Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net>
8 *
Matt Helsley3fa21642006-06-23 02:05:44 -07009 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of version 2.1 of the GNU Lesser General Public License
11 * as published by the Free Software Foundation.
Matt Helsley9f460802005-11-07 00:59:16 -080012 *
Matt Helsley3fa21642006-06-23 02:05:44 -070013 * This program is distributed in the hope that it would be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Matt Helsley9f460802005-11-07 00:59:16 -080016 */
17
18#ifndef CN_PROC_H
19#define CN_PROC_H
20
21#include <linux/types.h>
Matt Helsley9f460802005-11-07 00:59:16 -080022
23/*
24 * Userspace sends this enum to register with the kernel that it is listening
25 * for events on the connector.
26 */
27enum proc_cn_mcast_op {
28 PROC_CN_MCAST_LISTEN = 1,
29 PROC_CN_MCAST_IGNORE = 2
30};
31
32/*
33 * From the user's point of view, the process
34 * ID is the thread group ID and thread ID is the internal
35 * kernel "pid". So, fields are assigned as follow:
36 *
37 * In user space - In kernel space
38 *
39 * parent process ID = parent->tgid
40 * parent thread ID = parent->pid
41 * child process ID = child->tgid
42 * child thread ID = child->pid
43 */
44
45struct proc_event {
46 enum what {
47 /* Use successive bits so the enums can be used to record
48 * sets of events as well
49 */
50 PROC_EVENT_NONE = 0x00000000,
51 PROC_EVENT_FORK = 0x00000001,
52 PROC_EVENT_EXEC = 0x00000002,
53 PROC_EVENT_UID = 0x00000004,
54 PROC_EVENT_GID = 0x00000040,
55 /* "next" should be 0x00000400 */
56 /* "last" is the last process event: exit */
57 PROC_EVENT_EXIT = 0x80000000
58 } what;
59 __u32 cpu;
Chandra Seetharaman822cfbff2006-07-30 03:03:04 -070060 __u64 __attribute__((aligned(8))) timestamp_ns;
61 /* Number of nano seconds since system boot */
Matt Helsley9f460802005-11-07 00:59:16 -080062 union { /* must be last field of proc_event struct */
63 struct {
64 __u32 err;
65 } ack;
66
67 struct fork_proc_event {
68 pid_t parent_pid;
69 pid_t parent_tgid;
70 pid_t child_pid;
71 pid_t child_tgid;
72 } fork;
73
74 struct exec_proc_event {
75 pid_t process_pid;
76 pid_t process_tgid;
77 } exec;
78
79 struct id_proc_event {
80 pid_t process_pid;
81 pid_t process_tgid;
82 union {
Matt Helsleydf69a602005-11-29 19:34:31 -080083 __u32 ruid; /* task uid */
84 __u32 rgid; /* task gid */
Matt Helsley9f460802005-11-07 00:59:16 -080085 } r;
86 union {
Matt Helsleydf69a602005-11-29 19:34:31 -080087 __u32 euid;
88 __u32 egid;
Matt Helsley9f460802005-11-07 00:59:16 -080089 } e;
90 } id;
91
92 struct exit_proc_event {
93 pid_t process_pid;
94 pid_t process_tgid;
95 __u32 exit_code, exit_signal;
96 } exit;
97 } event_data;
98};
99
100#ifdef __KERNEL__
101#ifdef CONFIG_PROC_EVENTS
102void proc_fork_connector(struct task_struct *task);
103void proc_exec_connector(struct task_struct *task);
104void proc_id_connector(struct task_struct *task, int which_id);
105void proc_exit_connector(struct task_struct *task);
106#else
107static inline void proc_fork_connector(struct task_struct *task)
108{}
109
110static inline void proc_exec_connector(struct task_struct *task)
111{}
112
113static inline void proc_id_connector(struct task_struct *task,
114 int which_id)
115{}
116
117static inline void proc_exit_connector(struct task_struct *task)
118{}
119#endif /* CONFIG_PROC_EVENTS */
120#endif /* __KERNEL__ */
121#endif /* CN_PROC_H */