drivers/staging/android/logger.h

   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 logger_entry - 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 struct logger_entry {
  34         __u16           len;
  35         __u16           __pad;
  36         __s32           pid;
  37         __s32           tid;
  38         __s32           sec;
  39         __s32           nsec;
  40         char            msg[0];
  41 };
  42
  43 #define LOGGER_LOG_RADIO        "log_radio"     /* radio-related messages */
  44 #define LOGGER_LOG_EVENTS       "log_events"    /* system/hardware events */
  45 #define LOGGER_LOG_SYSTEM       "log_system"    /* system/framework messages */
  46 #define LOGGER_LOG_MAIN         "log_main"      /* everything else */
  47
  48 #define LOGGER_ENTRY_MAX_LEN            (4*1024)
  49 #define LOGGER_ENTRY_MAX_PAYLOAD        \
  50         (LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))
  51
  52 #define __LOGGERIO      0xAE
  53
  54 #define LOGGER_GET_LOG_BUF_SIZE         _IO(__LOGGERIO, 1) /* size of log */
  55 #define LOGGER_GET_LOG_LEN              _IO(__LOGGERIO, 2) /* used log len */
  56 #define LOGGER_GET_NEXT_ENTRY_LEN       _IO(__LOGGERIO, 3) /* next entry len */
  57 #define LOGGER_FLUSH_LOG                _IO(__LOGGERIO, 4) /* flush log */
  58
  59 #endif /* _LINUX_LOGGER_H */