1/* include/linux/logger.h
 2 *
 3 * Copyright (C) 2007-2008 Google, Inc.
 4 * Author: Robert Love <rlove@android.com>
 5 *
 6 * This software is licensed under the terms of the GNU General Public
 7 * License version 2, as published by the Free Software Foundation, and
 8 * may be copied, distributed, and modified under those terms.
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 */
16
17#ifndef _LINUX_LOGGER_H
18#define _LINUX_LOGGER_H
19
20#include <linux/types.h>
21#include <linux/ioctl.h>
22
23/**
24 * struct user_logger_entry_compat - defines a single entry that is given to a logger
25 * @len:	The length of the payload
26 * @__pad:	Two bytes of padding that appear to be required
27 * @pid:	The generating process' process ID
28 * @tid:	The generating process' thread ID
29 * @sec:	The number of seconds that have elapsed since the Epoch
30 * @nsec:	The number of nanoseconds that have elapsed since @sec
31 * @msg:	The message that is to be logged
32 *
33 * The userspace structure for version 1 of the logger_entry ABI.
34 * This structure is returned to userspace unless the caller requests
35 * an upgrade to a newer ABI version.
36 */
37struct user_logger_entry_compat {
38	__u16		len;
39	__u16		__pad;
40	__s32		pid;
41	__s32		tid;
42	__s32		sec;
43	__s32		nsec;
44	char		msg[0];
45};
46
47/**
48 * struct logger_entry - defines a single entry that is given to a logger
49 * @len:	The length of the payload
50 * @hdr_size:	sizeof(struct logger_entry_v2)
51 * @pid:	The generating process' process ID
52 * @tid:	The generating process' thread ID
53 * @sec:	The number of seconds that have elapsed since the Epoch
54 * @nsec:	The number of nanoseconds that have elapsed since @sec
55 * @euid:	Effective UID of logger
56 * @msg:	The message that is to be logged
57 *
58 * The structure for version 2 of the logger_entry ABI.
59 * This structure is returned to userspace if ioctl(LOGGER_SET_VERSION)
60 * is called with version >= 2
61 */
62struct logger_entry {
63	__u16		len;
64	__u16		hdr_size;
65	__s32		pid;
66	__s32		tid;
67	__s32		sec;
68	__s32		nsec;
69	kuid_t		euid;
70	char		msg[0];
71};
72
73#define LOGGER_LOG_RADIO	"log_radio"	/* radio-related messages */
74#define LOGGER_LOG_EVENTS	"log_events"	/* system/hardware events */
75#define LOGGER_LOG_SYSTEM	"log_system"	/* system/framework messages */
76#define LOGGER_LOG_MAIN		"log_main"	/* everything else */
77
78#define LOGGER_ENTRY_MAX_PAYLOAD	4076
79
80#define __LOGGERIO	0xAE
81
82#define LOGGER_GET_LOG_BUF_SIZE		_IO(__LOGGERIO, 1) /* size of log */
83#define LOGGER_GET_LOG_LEN		_IO(__LOGGERIO, 2) /* used log len */
84#define LOGGER_GET_NEXT_ENTRY_LEN	_IO(__LOGGERIO, 3) /* next entry len */
85#define LOGGER_FLUSH_LOG		_IO(__LOGGERIO, 4) /* flush log */
86#define LOGGER_GET_VERSION		_IO(__LOGGERIO, 5) /* abi version */
87#define LOGGER_SET_VERSION		_IO(__LOGGERIO, 6) /* abi version */
88
89#endif /* _LINUX_LOGGER_H */