/* * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project. * * Copyright (c) 2001-2004 Anton Altaparmakov * * This program/include file 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; either version 2 of the License, or * (at your option) any later version. * * This program/include file is distributed in the hope that it will 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 (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */ #include "debug.h" /* * A static buffer to hold the error string being displayed and a spinlock * to protect concurrent accesses to it. */static char err_buf[1024];static DEFINE_SPINLOCK(err_buf_lock); /** * __ntfs_warning - output a warning to the syslog * @function:	name of function outputting the warning * @sb:		super block of mounted ntfs filesystem * @fmt:	warning string containing format specifications * @...:	a variable number of arguments specified in @fmt * * Outputs a warning to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the warning string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_warning is being * called. * * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */void __ntfs_warning(const char *function, const struct super_block *sb,		const char *fmt, ...){	va_list args;	int flen = 0; #ifndef DEBUG	if (!printk_ratelimit())		return;#endif	if (function)		flen = strlen(function);	spin_lock(&err_buf_lock);	va_start(args, fmt);	vsnprintf(err_buf, sizeof(err_buf), fmt, args);	va_end(args);	if (sb)		printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n",				sb->s_id, flen ? function : "", err_buf);	else		printk(KERN_ERR "NTFS-fs warning: %s(): %s\n",				flen ? function : "", err_buf);	spin_unlock(&err_buf_lock);} /** * __ntfs_error - output an error to the syslog * @function:	name of function outputting the error * @sb:		super block of mounted ntfs filesystem * @fmt:	error string containing format specifications * @...:	a variable number of arguments specified in @fmt * * Outputs an error to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the error string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_error is being * called. * * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */void __ntfs_error(const char *function, const struct super_block *sb,		const char *fmt, ...){	va_list args;	int flen = 0; #ifndef DEBUG	if (!printk_ratelimit())		return;#endif	if (function)		flen = strlen(function);	spin_lock(&err_buf_lock);	va_start(args, fmt);	vsnprintf(err_buf, sizeof(err_buf), fmt, args);	va_end(args);	if (sb)		printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n",				sb->s_id, flen ? function : "", err_buf);	else		printk(KERN_ERR "NTFS-fs error: %s(): %s\n",				flen ? function : "", err_buf);	spin_unlock(&err_buf_lock);} #ifdef DEBUG /* If 1, output debug messages, and if 0, don't. */int debug_msgs = 0; void __ntfs_debug (const char *file, int line, const char *function,		const char *fmt, ...){	va_list args;	int flen = 0; 	if (!debug_msgs)		return;	if (function)		flen = strlen(function);	spin_lock(&err_buf_lock);	va_start(args, fmt);	vsnprintf(err_buf, sizeof(err_buf), fmt, args);	va_end(args);	printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line,			flen ? function : "", err_buf);	spin_unlock(&err_buf_lock);} /* Dump a runlist. Caller has to provide synchronisation for @rl. */void ntfs_debug_dump_runlist(const runlist_element *rl){	int i;	const char *lcn_str[5] = { "LCN_HOLE         ", "LCN_RL_NOT_MAPPED",				   "LCN_ENOENT       ", "LCN_unknown      " }; 	if (!debug_msgs)		return;	printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n");	if (!rl) {		printk(KERN_DEBUG "Run list not present.\n");		return;	}	printk(KERN_DEBUG "VCN              LCN               Run length\n");	for (i = 0; ; i++) {		LCN lcn = (rl + i)->lcn; 		if (lcn < (LCN)0) {			int index = -lcn - 1; 			if (index > -LCN_ENOENT - 1)				index = 3;			printk(KERN_DEBUG "%-16Lx %s %-16Lx%s\n",					(long long)(rl + i)->vcn, lcn_str[index],					(long long)(rl + i)->length,					(rl + i)->length ? "" :						" (runlist end)");		} else			printk(KERN_DEBUG "%-16Lx %-16Lx  %-16Lx%s\n",					(long long)(rl + i)->vcn,					(long long)(rl + i)->lcn,					(long long)(rl + i)->length,					(rl + i)->length ? "" :						" (runlist end)");		if (!(rl + i)->length)			break;	}} #endif