cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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debug.c (4147B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
      4 *
      5 * Copyright (c) 2001-2004 Anton Altaparmakov
      6 */
      7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
      8#include "debug.h"
      9
     10/**
     11 * __ntfs_warning - output a warning to the syslog
     12 * @function:	name of function outputting the warning
     13 * @sb:		super block of mounted ntfs filesystem
     14 * @fmt:	warning string containing format specifications
     15 * @...:	a variable number of arguments specified in @fmt
     16 *
     17 * Outputs a warning to the syslog for the mounted ntfs filesystem described
     18 * by @sb.
     19 *
     20 * @fmt and the corresponding @... is printf style format string containing
     21 * the warning string and the corresponding format arguments, respectively.
     22 *
     23 * @function is the name of the function from which __ntfs_warning is being
     24 * called.
     25 *
     26 * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead
     27 * as this provides the @function parameter automatically.
     28 */
     29void __ntfs_warning(const char *function, const struct super_block *sb,
     30		const char *fmt, ...)
     31{
     32	struct va_format vaf;
     33	va_list args;
     34	int flen = 0;
     35
     36#ifndef DEBUG
     37	if (!printk_ratelimit())
     38		return;
     39#endif
     40	if (function)
     41		flen = strlen(function);
     42	va_start(args, fmt);
     43	vaf.fmt = fmt;
     44	vaf.va = &args;
     45	if (sb)
     46		pr_warn("(device %s): %s(): %pV\n",
     47			sb->s_id, flen ? function : "", &vaf);
     48	else
     49		pr_warn("%s(): %pV\n", flen ? function : "", &vaf);
     50	va_end(args);
     51}
     52
     53/**
     54 * __ntfs_error - output an error to the syslog
     55 * @function:	name of function outputting the error
     56 * @sb:		super block of mounted ntfs filesystem
     57 * @fmt:	error string containing format specifications
     58 * @...:	a variable number of arguments specified in @fmt
     59 *
     60 * Outputs an error to the syslog for the mounted ntfs filesystem described
     61 * by @sb.
     62 *
     63 * @fmt and the corresponding @... is printf style format string containing
     64 * the error string and the corresponding format arguments, respectively.
     65 *
     66 * @function is the name of the function from which __ntfs_error is being
     67 * called.
     68 *
     69 * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead
     70 * as this provides the @function parameter automatically.
     71 */
     72void __ntfs_error(const char *function, const struct super_block *sb,
     73		const char *fmt, ...)
     74{
     75	struct va_format vaf;
     76	va_list args;
     77	int flen = 0;
     78
     79#ifndef DEBUG
     80	if (!printk_ratelimit())
     81		return;
     82#endif
     83	if (function)
     84		flen = strlen(function);
     85	va_start(args, fmt);
     86	vaf.fmt = fmt;
     87	vaf.va = &args;
     88	if (sb)
     89		pr_err("(device %s): %s(): %pV\n",
     90		       sb->s_id, flen ? function : "", &vaf);
     91	else
     92		pr_err("%s(): %pV\n", flen ? function : "", &vaf);
     93	va_end(args);
     94}
     95
     96#ifdef DEBUG
     97
     98/* If 1, output debug messages, and if 0, don't. */
     99int debug_msgs = 0;
    100
    101void __ntfs_debug(const char *file, int line, const char *function,
    102		const char *fmt, ...)
    103{
    104	struct va_format vaf;
    105	va_list args;
    106	int flen = 0;
    107
    108	if (!debug_msgs)
    109		return;
    110	if (function)
    111		flen = strlen(function);
    112	va_start(args, fmt);
    113	vaf.fmt = fmt;
    114	vaf.va = &args;
    115	pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);
    116	va_end(args);
    117}
    118
    119/* Dump a runlist. Caller has to provide synchronisation for @rl. */
    120void ntfs_debug_dump_runlist(const runlist_element *rl)
    121{
    122	int i;
    123	const char *lcn_str[5] = { "LCN_HOLE         ", "LCN_RL_NOT_MAPPED",
    124				   "LCN_ENOENT       ", "LCN_unknown      " };
    125
    126	if (!debug_msgs)
    127		return;
    128	pr_debug("Dumping runlist (values in hex):\n");
    129	if (!rl) {
    130		pr_debug("Run list not present.\n");
    131		return;
    132	}
    133	pr_debug("VCN              LCN               Run length\n");
    134	for (i = 0; ; i++) {
    135		LCN lcn = (rl + i)->lcn;
    136
    137		if (lcn < (LCN)0) {
    138			int index = -lcn - 1;
    139
    140			if (index > -LCN_ENOENT - 1)
    141				index = 3;
    142			pr_debug("%-16Lx %s %-16Lx%s\n",
    143					(long long)(rl + i)->vcn, lcn_str[index],
    144					(long long)(rl + i)->length,
    145					(rl + i)->length ? "" :
    146						" (runlist end)");
    147		} else
    148			pr_debug("%-16Lx %-16Lx  %-16Lx%s\n",
    149					(long long)(rl + i)->vcn,
    150					(long long)(rl + i)->lcn,
    151					(long long)(rl + i)->length,
    152					(rl + i)->length ? "" :
    153						" (runlist end)");
    154		if (!(rl + i)->length)
    155			break;
    156	}
    157}
    158
    159#endif