[deliverable/linux.git] / fs / xfs / support / debug.c

/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "debug.h"
#include "spin.h"
#include <asm/page.h>
#include <linux/sched.h>
#include <linux/kernel.h>

static char		message[256];	/* keep it off the stack */
static DEFINE_SPINLOCK(xfs_err_lock);

/* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */
#define XFS_MAX_ERR_LEVEL	7
#define XFS_ERR_MASK		((1 << 3) - 1)
static const char * const	err_level[XFS_MAX_ERR_LEVEL+1] =
					{KERN_EMERG, KERN_ALERT, KERN_CRIT,
					 KERN_ERR, KERN_WARNING, KERN_NOTICE,
					 KERN_INFO, KERN_DEBUG};

void
cmn_err(register int level, char *fmt, ...)
{
	char	*fp = fmt;
	int	len;
	ulong	flags;
	va_list	ap;

	level &= XFS_ERR_MASK;
	if (level > XFS_MAX_ERR_LEVEL)
		level = XFS_MAX_ERR_LEVEL;
	spin_lock_irqsave(&xfs_err_lock,flags);
	va_start(ap, fmt);
	if (*fmt == '!') fp++;
	len = vsprintf(message, fp, ap);
	if (level != CE_DEBUG && message[len-1] != '\n')
		strcat(message, "\n");
	printk("%s%s", err_level[level], message);
	va_end(ap);
	spin_unlock_irqrestore(&xfs_err_lock,flags);

	if (level == CE_PANIC)
		BUG();
}

void
icmn_err(register int level, char *fmt, va_list ap)
{
	ulong	flags;
	int	len;

	level &= XFS_ERR_MASK;
	if(level > XFS_MAX_ERR_LEVEL)
		level = XFS_MAX_ERR_LEVEL;
	spin_lock_irqsave(&xfs_err_lock,flags);
	len = vsprintf(message, fmt, ap);
	if (level != CE_DEBUG && message[len-1] != '\n')
		strcat(message, "\n");
	spin_unlock_irqrestore(&xfs_err_lock,flags);
	printk("%s%s", err_level[level], message);
	if (level == CE_PANIC)
		BUG();
}

void
assfail(char *expr, char *file, int line)
{
	printk("Assertion failed: %s, file: %s, line: %d\n", expr, file, line);
	BUG();
}

#if ((defined(DEBUG) || defined(INDUCE_IO_ERRROR)) && !defined(NO_WANT_RANDOM))
unsigned long random(void)
{
	static unsigned long	RandomValue = 1;
	/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
	register long	rv = RandomValue;
	register long	lo;
	register long	hi;

	hi = rv / 127773;
	lo = rv % 127773;
	rv = 16807 * lo - 2836 * hi;
	if (rv <= 0) rv += 2147483647;
	return RandomValue = rv;
}
#endif /* DEBUG || INDUCE_IO_ERRROR || !NO_WANT_RANDOM */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4	17	*/
1da177e4	18	#include "debug.h"
cde410a9	19	#include "spin.h"
1da177e4 LT	20	#include <asm/page.h>
	21	#include <linux/sched.h>
	22	#include <linux/kernel.h>
	23
1da177e4 LT	24	static char message[256]; /* keep it off the stack */
	25	static DEFINE_SPINLOCK(xfs_err_lock);
	26
	27	/* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */
	28	#define XFS_MAX_ERR_LEVEL 7
	29	#define XFS_ERR_MASK ((1 << 3) - 1)
1df84c93	30	static const char * const err_level[XFS_MAX_ERR_LEVEL+1] =
1da177e4 LT	31	{KERN_EMERG, KERN_ALERT, KERN_CRIT,
	32	KERN_ERR, KERN_WARNING, KERN_NOTICE,
	33	KERN_INFO, KERN_DEBUG};
	34
1da177e4 LT	35	void
	36	cmn_err(register int level, char *fmt, ...)
	37	{
	38	char *fp = fmt;
	39	int len;
	40	ulong flags;
	41	va_list ap;
	42
	43	level &= XFS_ERR_MASK;
	44	if (level > XFS_MAX_ERR_LEVEL)
	45	level = XFS_MAX_ERR_LEVEL;
	46	spin_lock_irqsave(&xfs_err_lock,flags);
	47	va_start(ap, fmt);
	48	if (*fmt == '!') fp++;
	49	len = vsprintf(message, fp, ap);
b6574520	50	if (level != CE_DEBUG && message[len-1] != '\n')
1da177e4 LT	51	strcat(message, "\n");
	52	printk("%s%s", err_level[level], message);
	53	va_end(ap);
	54	spin_unlock_irqrestore(&xfs_err_lock,flags);
	55
	56	if (level == CE_PANIC)
	57	BUG();
	58	}
	59
1da177e4 LT	60	void
	61	icmn_err(register int level, char *fmt, va_list ap)
	62	{
	63	ulong flags;
	64	int len;
	65
	66	level &= XFS_ERR_MASK;
	67	if(level > XFS_MAX_ERR_LEVEL)
	68	level = XFS_MAX_ERR_LEVEL;
	69	spin_lock_irqsave(&xfs_err_lock,flags);
	70	len = vsprintf(message, fmt, ap);
b6574520	71	if (level != CE_DEBUG && message[len-1] != '\n')
1da177e4 LT	72	strcat(message, "\n");
	73	spin_unlock_irqrestore(&xfs_err_lock,flags);
	74	printk("%s%s", err_level[level], message);
	75	if (level == CE_PANIC)
	76	BUG();
	77	}
3762ec6b NS	78
	79	void
	80	assfail(char expr, char file, int line)
	81	{
	82	printk("Assertion failed: %s, file: %s, line: %d\n", expr, file, line);
	83	BUG();
	84	}
	85
	86	#if ((defined(DEBUG) \|\| defined(INDUCE_IO_ERRROR)) && !defined(NO_WANT_RANDOM))
	87	unsigned long random(void)
	88	{
	89	static unsigned long RandomValue = 1;
	90	/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
	91	register long rv = RandomValue;
	92	register long lo;
	93	register long hi;
	94
	95	hi = rv / 127773;
	96	lo = rv % 127773;
	97	rv = 16807 * lo - 2836 * hi;
	98	if (rv <= 0) rv += 2147483647;
	99	return RandomValue = rv;
	100	}
	101	#endif /* DEBUG \|\| INDUCE_IO_ERRROR \|\| !NO_WANT_RANDOM */