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* debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
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* Copyright (c) 2001-2004 Anton Altaparmakov
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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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* 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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* 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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* A static buffer to hold the error string being displayed and a spinlock
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* to protect concurrent accesses to it.
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static char err_buf[1024];
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static DEFINE_SPINLOCK(err_buf_lock);
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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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* Outputs a warning to the syslog for the mounted ntfs filesystem described
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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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* @function is the name of the function from which __ntfs_warning is being
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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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void __ntfs_warning(const char *function, const struct super_block *sb,
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if (!printk_ratelimit())
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flen = strlen(function);
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spin_lock(&err_buf_lock);
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vsnprintf(err_buf, sizeof(err_buf), fmt, args);
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printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n",
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sb->s_id, flen ? function : "", err_buf);
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printk(KERN_ERR "NTFS-fs warning: %s(): %s\n",
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flen ? function : "", err_buf);
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spin_unlock(&err_buf_lock);
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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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* Outputs an error to the syslog for the mounted ntfs filesystem described
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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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* @function is the name of the function from which __ntfs_error is being
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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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void __ntfs_error(const char *function, const struct super_block *sb,
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if (!printk_ratelimit())
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flen = strlen(function);
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spin_lock(&err_buf_lock);
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vsnprintf(err_buf, sizeof(err_buf), fmt, args);
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printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n",
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sb->s_id, flen ? function : "", err_buf);
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printk(KERN_ERR "NTFS-fs error: %s(): %s\n",
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flen ? function : "", err_buf);
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spin_unlock(&err_buf_lock);
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/* If 1, output debug messages, and if 0, don't. */
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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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flen = strlen(function);
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spin_lock(&err_buf_lock);
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vsnprintf(err_buf, sizeof(err_buf), fmt, args);
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printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line,
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flen ? function : "", err_buf);
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spin_unlock(&err_buf_lock);
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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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const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED",
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"LCN_ENOENT ", "LCN_unknown " };
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printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n");
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printk(KERN_DEBUG "Run list not present.\n");
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printk(KERN_DEBUG "VCN LCN Run length\n");
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LCN lcn = (rl + i)->lcn;
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int index = -lcn - 1;
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if (index > -LCN_ENOENT - 1)
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printk(KERN_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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printk(KERN_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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if (!(rl + i)->length)