2 * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
4 * Copyright (c) 2001,2002 Anton Altaparmakov.
6 * This program/include file is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as published
8 * by the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program/include file is distributed in the hope that it will be
12 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program (in the main directory of the Linux-NTFS
18 * distribution in the file COPYING); if not, write to the Free Software
19 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * A static buffer to hold the error string being displayed and a spinlock
26 * to protect concurrent accesses to it.
28 static char err_buf
[1024];
29 static spinlock_t err_buf_lock
= SPIN_LOCK_UNLOCKED
;
32 * __ntfs_warning - output a warning to the syslog
33 * @function: name of function outputting the warning
34 * @sb: super block of mounted ntfs filesystem
35 * @fmt: warning string containing format specifications
36 * @...: a variable number of arguments specified in @fmt
38 * Outputs a warning to the syslog for the mounted ntfs filesystem described
41 * @fmt and the corresponding @... is printf style format string containing
42 * the warning string and the corresponding format arguments, respectively.
44 * @function is the name of the function from which __ntfs_warning is being
47 * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead
48 * as this provides the @function parameter automatically.
50 void __ntfs_warning(const char *function
, const struct super_block
*sb
,
57 flen
= strlen(function
);
58 spin_lock(&err_buf_lock
);
60 vsnprintf(err_buf
, sizeof(err_buf
), fmt
, args
);
63 printk(KERN_ERR
"NTFS-fs warning (device %s): %s(): %s\n",
64 sb
->s_id
, flen
? function
: "", err_buf
);
66 printk(KERN_ERR
"NTFS-fs warning: %s(): %s\n",
67 flen
? function
: "", err_buf
);
68 spin_unlock(&err_buf_lock
);
72 * __ntfs_error - output an error to the syslog
73 * @function: name of function outputting the error
74 * @sb: super block of mounted ntfs filesystem
75 * @fmt: error string containing format specifications
76 * @...: a variable number of arguments specified in @fmt
78 * Outputs an error to the syslog for the mounted ntfs filesystem described
81 * @fmt and the corresponding @... is printf style format string containing
82 * the error string and the corresponding format arguments, respectively.
84 * @function is the name of the function from which __ntfs_error is being
87 * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead
88 * as this provides the @function parameter automatically.
90 void __ntfs_error(const char *function
, const struct super_block
*sb
,
97 flen
= strlen(function
);
98 spin_lock(&err_buf_lock
);
100 vsnprintf(err_buf
, sizeof(err_buf
), fmt
, args
);
103 printk(KERN_ERR
"NTFS-fs error (device %s): %s(): %s\n",
104 sb
->s_id
, flen
? function
: "", err_buf
);
106 printk(KERN_ERR
"NTFS-fs error: %s(): %s\n",
107 flen
? function
: "", err_buf
);
108 spin_unlock(&err_buf_lock
);
113 /* If 1, output debug messages, and if 0, don't. */
116 void __ntfs_debug (const char *file
, int line
, const char *function
,
117 const char *fmt
, ...)
125 flen
= strlen(function
);
126 spin_lock(&err_buf_lock
);
128 vsnprintf(err_buf
, sizeof(err_buf
), fmt
, args
);
130 printk(KERN_DEBUG
"NTFS-fs DEBUG (%s, %d): %s: %s\n",
131 file
, line
, flen
? function
: "", err_buf
);
132 spin_unlock(&err_buf_lock
);
135 /* Dump a run list. Caller has to provide synchronisation for @rl. */
136 void ntfs_debug_dump_runlist(const run_list_element
*rl
)
139 const char *lcn_str
[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED",
140 "LCN_ENOENT ", "LCN_EINVAL ",
145 printk(KERN_DEBUG
"NTFS-fs DEBUG: Dumping run list (values "
148 printk(KERN_DEBUG
"Run list not present.\n");
151 printk(KERN_DEBUG
"VCN LCN Run length\n");
153 LCN lcn
= (rl
+ i
)->lcn
;
156 int index
= -lcn
- 1;
158 if (index
> -LCN_EINVAL
- 1)
160 printk(KERN_DEBUG
"%-16Lx %s %-16Lx%s\n",
161 (rl
+ i
)->vcn
, lcn_str
[index
],
162 (rl
+ i
)->length
, (rl
+ i
)->length
?
163 "" : " (run list end)");
165 printk(KERN_DEBUG
"%-16Lx %-16Lx %-16Lx%s\n",
166 (rl
+ i
)->vcn
, (rl
+ i
)->lcn
,
167 (rl
+ i
)->length
, (rl
+ i
)->length
?
168 "" : " (run list end)");
169 if (!(rl
+ i
)->length
)