// SPDX-License-Identifier: GPL-2.0-or-later/* * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project. * * Copyright (c) 2001-2004 Anton Altaparmakov */#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt#include "debug.h" /** * __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, ...){	struct va_format vaf;	va_list args;	int flen = 0; #ifndef DEBUG	if (!printk_ratelimit())		return;#endif	if (function)		flen = strlen(function);	va_start(args, fmt);	vaf.fmt = fmt;	vaf.va = &args;	if (sb)		pr_warn("(device %s): %s(): %pV\n",			sb->s_id, flen ? function : "", &vaf);	else		pr_warn("%s(): %pV\n", flen ? function : "", &vaf);	va_end(args);} /** * __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, ...){	struct va_format vaf;	va_list args;	int flen = 0; #ifndef DEBUG	if (!printk_ratelimit())		return;#endif	if (function)		flen = strlen(function);	va_start(args, fmt);	vaf.fmt = fmt;	vaf.va = &args;	if (sb)		pr_err("(device %s): %s(): %pV\n",		       sb->s_id, flen ? function : "", &vaf);	else		pr_err("%s(): %pV\n", flen ? function : "", &vaf);	va_end(args);} #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, ...){	struct va_format vaf;	va_list args;	int flen = 0; 	if (!debug_msgs)		return;	if (function)		flen = strlen(function);	va_start(args, fmt);	vaf.fmt = fmt;	vaf.va = &args;	pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);	va_end(args);} /* 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;	pr_debug("Dumping runlist (values in hex):\n");	if (!rl) {		pr_debug("Run list not present.\n");		return;	}	pr_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;			pr_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			pr_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