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 struct logger_entry {
  24         __u16           len;    /* length of the payload */
  25         __u16           __pad;  /* no matter what, we get 2 bytes of padding */
  26         __s32           pid;    /* generating process's pid */
  27         __s32           tid;    /* generating process's tid */
  28         __s32           sec;    /* seconds since Epoch */
  29         __s32           nsec;   /* nanoseconds */
  30         char            msg[0]; /* the entry's payload */
  31 };
  32
  33 #define LOGGER_LOG_RADIO        "log_radio"     /* radio-related messages */
  34 #define LOGGER_LOG_EVENTS       "log_events"    /* system/hardware events */
  35 #define LOGGER_LOG_MAIN         "log_main"      /* everything else */
  36
  37 #define LOGGER_ENTRY_MAX_LEN            (4*1024)
  38 #define LOGGER_ENTRY_MAX_PAYLOAD        \
  39         (LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))
  40
  41 #define __LOGGERIO      0xAE
  42
  43 #define LOGGER_GET_LOG_BUF_SIZE         _IO(__LOGGERIO, 1) /* size of log */
  44 #define LOGGER_GET_LOG_LEN              _IO(__LOGGERIO, 2) /* used log len */
  45 #define LOGGER_GET_NEXT_ENTRY_LEN       _IO(__LOGGERIO, 3) /* next entry len */
  46 #define LOGGER_FLUSH_LOG                _IO(__LOGGERIO, 4) /* flush log */
  47
  48 #endif /* _LINUX_LOGGER_H */