/*
 * Copyright (c) 2004-2008 Voltaire, Inc. All rights reserved.
 * Copyright (c) 2002-2006 Mellanox Technologies LTD. All rights reserved.
 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

/*
 * Abstract:
 * 	Declaration of osm_log_t.
 *	This object represents the log file.
 *	This object is part of the OpenSM family of objects.
 */

#ifndef _OSM_LOG_H_
#define _OSM_LOG_H_

#ifndef __WIN__
#include <syslog.h>
#endif
#include <complib/cl_spinlock.h>
#include <opensm/osm_base.h>
#include <iba/ib_types.h>
#include <stdio.h>

#ifdef __GNUC__
#define STRICT_OSM_LOG_FORMAT __attribute__((format(printf, 3, 4)))
#else
#define STRICT_OSM_LOG_FORMAT
#endif

#ifdef __cplusplus
#  define BEGIN_C_DECLS extern "C" {
#  define END_C_DECLS   }
#else				/* !__cplusplus */
#  define BEGIN_C_DECLS
#  define END_C_DECLS
#endif				/* __cplusplus */

BEGIN_C_DECLS
#define LOG_ENTRY_SIZE_MAX		4096
#define BUF_SIZE			LOG_ENTRY_SIZE_MAX
#define __func__ __FUNCTION__
#define OSM_LOG_ENTER( OSM_LOG_PTR ) \
	osm_log( OSM_LOG_PTR, OSM_LOG_FUNCS, \
		 "%s: [\n", __func__);
#define OSM_LOG_EXIT( OSM_LOG_PTR ) \
	osm_log( OSM_LOG_PTR, OSM_LOG_FUNCS, \
		 "%s: ]\n", __func__);
/****h* OpenSM/Log
* NAME
*	Log
*
* DESCRIPTION
*
* AUTHOR
*
*********/
typedef uint8_t osm_log_level_t;

#define OSM_LOG_NONE	0x00
#define OSM_LOG_ERROR	0x01
#define OSM_LOG_INFO	0x02
#define OSM_LOG_VERBOSE	0x04
#define OSM_LOG_DEBUG	0x08
#define OSM_LOG_FUNCS	0x10
#define OSM_LOG_FRAMES	0x20
#define OSM_LOG_ROUTING	0x40
#define OSM_LOG_ALL	0x7f
#define OSM_LOG_SYS	0x80

/*
	DEFAULT - turn on ERROR and INFO only
*/
#define OSM_LOG_DEFAULT_LEVEL		OSM_LOG_ERROR | OSM_LOG_INFO

/****s* OpenSM: MAD Wrapper/osm_log_t
* NAME
*	osm_log_t
*
* DESCRIPTION
*
* SYNOPSIS
*/
typedef struct osm_log {
	osm_log_level_t level;
	cl_spinlock_t lock;
	unsigned long count;
	unsigned long max_size;
	boolean_t flush;
	FILE *out_port;
	boolean_t accum_log_file;
	boolean_t daemon;
	char *log_file_name;
} osm_log_t;
/*********/

/****f* OpenSM: Log/osm_log_construct
* NAME
*	osm_log_construct
*
* DESCRIPTION
*	This function constructs a Log object.
*
* SYNOPSIS
*/
static inline void osm_log_construct(IN osm_log_t * const p_log)
{
	cl_spinlock_construct(&p_log->lock);
}

/*
* PARAMETERS
*	p_log
*		[in] Pointer to a Log object to construct.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Allows calling osm_log_init, osm_log_init_v2, osm_log_destroy
*
*	Calling osm_log_construct is a prerequisite to calling any other
*	method except osm_log_init or osm_log_init_v2.
*
* SEE ALSO
*	Log object, osm_log_init, osm_log_init_v2,
*	osm_log_destroy
*********/

/****f* OpenSM: Log/osm_log_destroy
* NAME
*	osm_log_destroy
*
* DESCRIPTION
*	The osm_log_destroy function destroys the object, releasing
*	all resources.
*
* SYNOPSIS
*/
static inline void osm_log_destroy(IN osm_log_t * const p_log)
{
	cl_spinlock_destroy(&p_log->lock);
	if (p_log->out_port != stdout) {
		fclose(p_log->out_port);
		p_log->out_port = stdout;
	}
	closelog();
}

/*
* PARAMETERS
*	p_log
*		[in] Pointer to the object to destroy.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Performs any necessary cleanup of the specified
*	Log object.
*	Further operations should not be attempted on the destroyed object.
*	This function should only be called after a call to
*	osm_log_construct, osm_log_init, or osm_log_init_v2.
*
* SEE ALSO
*	Log object, osm_log_construct,
*	osm_log_init, osm_log_init_v2
*********/

/****f* OpenSM: Log/osm_log_init_v2
* NAME
*	osm_log_init_v2
*
* DESCRIPTION
*	The osm_log_init_v2 function initializes a
*	Log object for use.
*
* SYNOPSIS
*/
ib_api_status_t
osm_log_init_v2(IN osm_log_t * const p_log,
		IN const boolean_t flush,
		IN const uint8_t log_flags,
		IN const char *log_file,
		IN const unsigned long max_size,
		IN const boolean_t accum_log_file);
/*
* PARAMETERS
*	p_log
*		[in] Pointer to the log object.
*
*	flush
*		[in] Set to TRUE directs the log to flush all log messages
*		immediately.  This severely degrades log performance,
*		and is normally used for debugging only.
*
*	log_flags
*		[in] The log verbosity level to be used.
*
*	log_file
*		[in] if not NULL defines the name of the log file. Otherwise
*		it is stdout.
*
* RETURN VALUES
*	CL_SUCCESS if the Log object was initialized
*	successfully.
*
* NOTES
*	Allows calling other Log methods.
*
* SEE ALSO
*	Log object, osm_log_construct,
*	osm_log_destroy
*********/

/****f* OpenSM: Log/osm_log_reopen_file
* NAME
*	osm_log_reopen_file
*
* DESCRIPTION
*	The osm_log_reopen_file function reopens the log file
*
* SYNOPSIS
*/
int osm_log_reopen_file(osm_log_t * p_log);
/*
* PARAMETERS
*	p_log
*		[in] Pointer to the log object.
*
* RETURN VALUES
*	0 on success or nonzero value otherwise.
*********/

/****f* OpenSM: Log/osm_log_init
* NAME
*	osm_log_init
*
* DESCRIPTION
*	The osm_log_init function initializes a
*	Log object for use. It is a wrapper for osm_log_init_v2().
*
* SYNOPSIS
*/
ib_api_status_t
osm_log_init(IN osm_log_t * const p_log,
	     IN const boolean_t flush,
	     IN const uint8_t log_flags,
	     IN const char *log_file, IN const boolean_t accum_log_file);
/*
 * Same as osm_log_init_v2() but without max_size parameter
 */

void
osm_log(IN osm_log_t * const p_log,
	IN const osm_log_level_t verbosity,
	IN const char *p_str, ...) STRICT_OSM_LOG_FORMAT;

/****f* OpenSM: Log/osm_log_get_level
* NAME
*	osm_log_get_level
*
* DESCRIPTION
*	Returns the current log level.
*
* SYNOPSIS
*/
static inline osm_log_level_t
osm_log_get_level(IN const osm_log_t * const p_log)
{
	return (p_log->level);
}

/*
* PARAMETERS
*	p_log
*		[in] Pointer to the log object.
*
* RETURN VALUES
*	Returns the current log level.
*
* NOTES
*
* SEE ALSO
*	Log object, osm_log_construct,
*	osm_log_destroy
*********/

/****f* OpenSM: Log/osm_log_set_level
* NAME
*	osm_log_set_level
*
* DESCRIPTION
*	Sets the current log level.
*
* SYNOPSIS
*/
static inline void
osm_log_set_level(IN osm_log_t * const p_log, IN const osm_log_level_t level)
{
	p_log->level = level;
	osm_log(p_log, OSM_LOG_ALL, "Setting log level to: 0x%02x\n", level);
}

/*
* PARAMETERS
*	p_log
*		[in] Pointer to the log object.
*
*	level
*		[in] New level to set.
*
* RETURN VALUES
*	Returns the current log level.
*
* NOTES
*
* SEE ALSO
*	Log object, osm_log_construct,
*	osm_log_destroy
*********/

/****f* OpenSM: Log/osm_log_is_active
* NAME
*	osm_log_is_active
*
* DESCRIPTION
*	Returns TRUE if the specified log level would be logged.
*	FALSE otherwise.
*
* SYNOPSIS
*/
static inline boolean_t
osm_log_is_active(IN const osm_log_t * const p_log,
		  IN const osm_log_level_t level)
{
	return ((p_log->level & level) != 0);
}

/*
* PARAMETERS
*	p_log
*		[in] Pointer to the log object.
*
*	level
*		[in] Level to check.
*
* RETURN VALUES
*	Returns TRUE if the specified log level would be logged.
*	FALSE otherwise.
*
* NOTES
*
* SEE ALSO
*	Log object, osm_log_construct,
*	osm_log_destroy
*********/

extern void osm_log_msg_box(osm_log_t *log, osm_log_level_t level,
			    const char *func_name, const char *msg);
extern void osm_log_raw(IN osm_log_t * const p_log,
	    IN const osm_log_level_t verbosity, IN const char *p_buf);

#define OSM_LOG(log, level, fmt, arg...) do { \
		if (osm_log_is_active(log, (level))) \
			osm_log(log, level, "%s: " fmt, __func__, ##arg); \
	} while (0)

#define OSM_LOG_MSG_BOX(log, level, msg) \
		osm_log_msg_box(log, level, __func__, msg)

#define DBG_CL_LOCK 0

#define CL_PLOCK_EXCL_ACQUIRE( __exp__ )  \
{											    		\
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_excl_acquire: Acquiring %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
   cl_plock_excl_acquire( __exp__ );      \
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_excl_acquire: Acquired %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
}

#define CL_PLOCK_ACQUIRE( __exp__ )  \
{											    		\
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_acquire: Acquiring %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
   cl_plock_acquire( __exp__ );      \
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_acquire: Acquired %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
}

#define CL_PLOCK_RELEASE( __exp__ )  \
{											    		\
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_release: Releasing %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
   cl_plock_release( __exp__ );      \
   if (DBG_CL_LOCK)                      \
     printf("cl_plock_release: Released  %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
}

#define DBG_CL_SPINLOCK 0
#define CL_SPINLOCK_RELEASE( __exp__ )  \
{											    		\
   if (DBG_CL_SPINLOCK)                      \
     printf("cl_spinlock_release: Releasing %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
   cl_spinlock_release( __exp__ );      \
   if (DBG_CL_SPINLOCK)                      \
     printf("cl_spinlock_release: Released  %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
}

#define CL_SPINLOCK_ACQUIRE( __exp__ )  \
{											    		\
   if (DBG_CL_SPINLOCK)                      \
     printf("cl_spinlock_acquire: Acquiring %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
   cl_spinlock_acquire( __exp__ );      \
   if (DBG_CL_SPINLOCK)                      \
     printf("cl_spinlock_acquire: Acquired %p file %s, line %d\n", \
          __exp__,__FILE__, __LINE__);            \
}

/****f* OpenSM: Helper/osm_is_debug
* NAME
*	osm_is_debug
*
* DESCRIPTION
*	The osm_is_debug function returns TRUE if the opensm was compiled
*	in debug mode, and FALSE otherwise.
*
* SYNOPSIS
*/
boolean_t osm_is_debug(void);
/*
* PARAMETERS
*	None
*
* RETURN VALUE
*	TRUE if compiled in debug version. FALSE otherwise.
*
* NOTES
*
*********/

END_C_DECLS
#endif				/* _OSM_LOG_H_ */