usr/log.h

   1 /*
   2  * iSCSI Safe Logging and Tracing Library
   3  *
   4  * Copyright (C) 2004 Dmitry Yusupov, Alex Aizman
   5  * maintained by open-iscsi@googlegroups.com
   6  *
   7  * circular buffer code based on log.c from dm-multipath project
   8  *
   9  * heavily based on code from log.c:
  10  *   Copyright (C) 2002-2003 Ardis Technolgies <roman@ardistech.com>,
  11  *   licensed under the terms of the GNU GPL v2.0,
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published
  15  * by the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  21  * General Public License for more details.
  22  *
  23  * See the file COPYING included with this distribution for more details.
  24  */
  25
  26 #ifndef LOG_H
  27 #define LOG_H
  28
  29 #include "iscsid.h"
  30
  31 union semun {
  32         int val;
  33         struct semid_ds *buf;
  34         unsigned short int *array;
  35         struct seminfo *__buf;
  36 };
  37 #include <sys/sem.h>
  38
  39 #define DEFAULT_AREA_SIZE 16384
  40 #define MAX_MSG_SIZE 256
  41
  42 extern int log_daemon;
  43 extern int log_level;
  44
  45 struct logmsg {
  46         short int prio;
  47         void *next;
  48         char *str;
  49 };
  50
  51 struct logarea {
  52         int shmid;
  53         int shmid_msg;
  54         int shmid_buff;
  55         int empty;
  56         void *head;
  57         void *tail;
  58         void *start;
  59         void *end;
  60         char *buff;
  61         struct sembuf ops[1];
  62         int semid;
  63         union semun semarg;
  64 };
  65
  66 struct logarea *la;
  67
  68 extern int log_init (char * progname, int size);
  69 extern void log_close (pid_t pid);
  70 extern void dump_logmsg (void *);
  71 extern void log_warning(const char *fmt, ...)
  72         __attribute__ ((format (printf, 1, 2)));
  73 extern void log_error(const char *fmt, ...)
  74         __attribute__ ((format (printf, 1, 2)));
  75 extern void log_debug(int level, const char *fmt, ...)
  76         __attribute__ ((format (printf, 2, 3)));
  77
  78 #endif  /* LOG_H */