174 lines
4.8 KiB
C
174 lines
4.8 KiB
C
/*
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* debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2004 Anton Altaparmakov
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the Linux-NTFS
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "debug.h"
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/**
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* __ntfs_warning - output a warning to the syslog
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* @function: name of function outputting the warning
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* @sb: super block of mounted ntfs filesystem
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* @fmt: warning string containing format specifications
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* @...: a variable number of arguments specified in @fmt
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*
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* Outputs a warning to the syslog for the mounted ntfs filesystem described
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* by @sb.
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*
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* @fmt and the corresponding @... is printf style format string containing
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* the warning string and the corresponding format arguments, respectively.
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*
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* @function is the name of the function from which __ntfs_warning is being
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* called.
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*
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* Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead
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* as this provides the @function parameter automatically.
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*/
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void __ntfs_warning(const char *function, const struct super_block *sb,
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const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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int flen = 0;
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#ifndef DEBUG
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if (!printk_ratelimit())
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return;
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#endif
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if (function)
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flen = strlen(function);
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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if (sb)
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pr_warn("(device %s): %s(): %pV\n",
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sb->s_id, flen ? function : "", &vaf);
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else
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pr_warn("%s(): %pV\n", flen ? function : "", &vaf);
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va_end(args);
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}
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/**
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* __ntfs_error - output an error to the syslog
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* @function: name of function outputting the error
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* @sb: super block of mounted ntfs filesystem
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* @fmt: error string containing format specifications
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* @...: a variable number of arguments specified in @fmt
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*
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* Outputs an error to the syslog for the mounted ntfs filesystem described
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* by @sb.
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*
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* @fmt and the corresponding @... is printf style format string containing
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* the error string and the corresponding format arguments, respectively.
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*
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* @function is the name of the function from which __ntfs_error is being
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* called.
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*
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* Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead
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* as this provides the @function parameter automatically.
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*/
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void __ntfs_error(const char *function, const struct super_block *sb,
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const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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int flen = 0;
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#ifndef DEBUG
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if (!printk_ratelimit())
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return;
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#endif
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if (function)
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flen = strlen(function);
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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if (sb)
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pr_err("(device %s): %s(): %pV\n",
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sb->s_id, flen ? function : "", &vaf);
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else
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pr_err("%s(): %pV\n", flen ? function : "", &vaf);
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va_end(args);
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}
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#ifdef DEBUG
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/* If 1, output debug messages, and if 0, don't. */
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int debug_msgs = 0;
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void __ntfs_debug(const char *file, int line, const char *function,
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const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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int flen = 0;
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if (!debug_msgs)
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return;
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if (function)
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flen = strlen(function);
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);
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va_end(args);
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}
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/* Dump a runlist. Caller has to provide synchronisation for @rl. */
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void ntfs_debug_dump_runlist(const runlist_element *rl)
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{
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int i;
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const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED",
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"LCN_ENOENT ", "LCN_unknown " };
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if (!debug_msgs)
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return;
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pr_debug("Dumping runlist (values in hex):\n");
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if (!rl) {
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pr_debug("Run list not present.\n");
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return;
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}
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pr_debug("VCN LCN Run length\n");
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for (i = 0; ; i++) {
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LCN lcn = (rl + i)->lcn;
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if (lcn < (LCN)0) {
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int index = -lcn - 1;
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if (index > -LCN_ENOENT - 1)
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index = 3;
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pr_debug("%-16Lx %s %-16Lx%s\n",
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(long long)(rl + i)->vcn, lcn_str[index],
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(long long)(rl + i)->length,
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(rl + i)->length ? "" :
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" (runlist end)");
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} else
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pr_debug("%-16Lx %-16Lx %-16Lx%s\n",
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(long long)(rl + i)->vcn,
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(long long)(rl + i)->lcn,
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(long long)(rl + i)->length,
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(rl + i)->length ? "" :
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" (runlist end)");
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if (!(rl + i)->length)
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break;
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}
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}
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#endif
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