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1/*
2 * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
3 *
4 * Copyright (c) 2001-2004 Anton Altaparmakov
5 *
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.
10 *
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.
15 *
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
20 */
21
22#include "debug.h"
23
24/*
25 * A static buffer to hold the error string being displayed and a spinlock
26 * to protect concurrent accesses to it.
27 */
28static char err_buf[1024];
29static DEFINE_SPINLOCK(err_buf_lock);
30
31/**
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
37 *
38 * Outputs a warning to the syslog for the mounted ntfs filesystem described
39 * by @sb.
40 *
41 * @fmt and the corresponding @... is printf style format string containing
42 * the warning string and the corresponding format arguments, respectively.
43 *
44 * @function is the name of the function from which __ntfs_warning is being
45 * called.
46 *
47 * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead
48 * as this provides the @function parameter automatically.
49 */
50void __ntfs_warning(const char *function, const struct super_block *sb,
51 const char *fmt, ...)
52{
53 va_list args;
54 int flen = 0;
55
56#ifndef DEBUG
57 if (!printk_ratelimit())
58 return;
59#endif
60 if (function)
61 flen = strlen(function);
62 spin_lock(&err_buf_lock);
63 va_start(args, fmt);
64 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
65 va_end(args);
66 if (sb)
67 printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n",
68 sb->s_id, flen ? function : "", err_buf);
69 else
70 printk(KERN_ERR "NTFS-fs warning: %s(): %s\n",
71 flen ? function : "", err_buf);
72 spin_unlock(&err_buf_lock);
73}
74
75/**
76 * __ntfs_error - output an error to the syslog
77 * @function: name of function outputting the error
78 * @sb: super block of mounted ntfs filesystem
79 * @fmt: error string containing format specifications
80 * @...: a variable number of arguments specified in @fmt
81 *
82 * Outputs an error to the syslog for the mounted ntfs filesystem described
83 * by @sb.
84 *
85 * @fmt and the corresponding @... is printf style format string containing
86 * the error string and the corresponding format arguments, respectively.
87 *
88 * @function is the name of the function from which __ntfs_error is being
89 * called.
90 *
91 * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead
92 * as this provides the @function parameter automatically.
93 */
94void __ntfs_error(const char *function, const struct super_block *sb,
95 const char *fmt, ...)
96{
97 va_list args;
98 int flen = 0;
99
100#ifndef DEBUG
101 if (!printk_ratelimit())
102 return;
103#endif
104 if (function)
105 flen = strlen(function);
106 spin_lock(&err_buf_lock);
107 va_start(args, fmt);
108 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
109 va_end(args);
110 if (sb)
111 printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n",
112 sb->s_id, flen ? function : "", err_buf);
113 else
114 printk(KERN_ERR "NTFS-fs error: %s(): %s\n",
115 flen ? function : "", err_buf);
116 spin_unlock(&err_buf_lock);
117}
118
119#ifdef DEBUG
120
121/* If 1, output debug messages, and if 0, don't. */
122int debug_msgs = 0;
123
124void __ntfs_debug (const char *file, int line, const char *function,
125 const char *fmt, ...)
126{
127 va_list args;
128 int flen = 0;
129
130 if (!debug_msgs)
131 return;
132 if (function)
133 flen = strlen(function);
134 spin_lock(&err_buf_lock);
135 va_start(args, fmt);
136 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
137 va_end(args);
138 printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line,
139 flen ? function : "", err_buf);
140 spin_unlock(&err_buf_lock);
141}
142
143/* Dump a runlist. Caller has to provide synchronisation for @rl. */
144void ntfs_debug_dump_runlist(const runlist_element *rl)
145{
146 int i;
147 const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED",
148 "LCN_ENOENT ", "LCN_unknown " };
149
150 if (!debug_msgs)
151 return;
152 printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n");
153 if (!rl) {
154 printk(KERN_DEBUG "Run list not present.\n");
155 return;
156 }
157 printk(KERN_DEBUG "VCN LCN Run length\n");
158 for (i = 0; ; i++) {
159 LCN lcn = (rl + i)->lcn;
160
161 if (lcn < (LCN)0) {
162 int index = -lcn - 1;
163
164 if (index > -LCN_ENOENT - 1)
165 index = 3;
166 printk(KERN_DEBUG "%-16Lx %s %-16Lx%s\n",
167 (long long)(rl + i)->vcn, lcn_str[index],
168 (long long)(rl + i)->length,
169 (rl + i)->length ? "" :
170 " (runlist end)");
171 } else
172 printk(KERN_DEBUG "%-16Lx %-16Lx %-16Lx%s\n",
173 (long long)(rl + i)->vcn,
174 (long long)(rl + i)->lcn,
175 (long long)(rl + i)->length,
176 (rl + i)->length ? "" :
177 " (runlist end)");
178 if (!(rl + i)->length)
179 break;
180 }
181}
182
183#endif
1/*
2 * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
3 *
4 * Copyright (c) 2001-2004 Anton Altaparmakov
5 *
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.
10 *
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.
15 *
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
20 */
21#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22#include "debug.h"
23
24/**
25 * __ntfs_warning - output a warning to the syslog
26 * @function: name of function outputting the warning
27 * @sb: super block of mounted ntfs filesystem
28 * @fmt: warning string containing format specifications
29 * @...: a variable number of arguments specified in @fmt
30 *
31 * Outputs a warning to the syslog for the mounted ntfs filesystem described
32 * by @sb.
33 *
34 * @fmt and the corresponding @... is printf style format string containing
35 * the warning string and the corresponding format arguments, respectively.
36 *
37 * @function is the name of the function from which __ntfs_warning is being
38 * called.
39 *
40 * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead
41 * as this provides the @function parameter automatically.
42 */
43void __ntfs_warning(const char *function, const struct super_block *sb,
44 const char *fmt, ...)
45{
46 struct va_format vaf;
47 va_list args;
48 int flen = 0;
49
50#ifndef DEBUG
51 if (!printk_ratelimit())
52 return;
53#endif
54 if (function)
55 flen = strlen(function);
56 va_start(args, fmt);
57 vaf.fmt = fmt;
58 vaf.va = &args;
59 if (sb)
60 pr_warn("(device %s): %s(): %pV\n",
61 sb->s_id, flen ? function : "", &vaf);
62 else
63 pr_warn("%s(): %pV\n", flen ? function : "", &vaf);
64 va_end(args);
65}
66
67/**
68 * __ntfs_error - output an error to the syslog
69 * @function: name of function outputting the error
70 * @sb: super block of mounted ntfs filesystem
71 * @fmt: error string containing format specifications
72 * @...: a variable number of arguments specified in @fmt
73 *
74 * Outputs an error to the syslog for the mounted ntfs filesystem described
75 * by @sb.
76 *
77 * @fmt and the corresponding @... is printf style format string containing
78 * the error string and the corresponding format arguments, respectively.
79 *
80 * @function is the name of the function from which __ntfs_error is being
81 * called.
82 *
83 * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead
84 * as this provides the @function parameter automatically.
85 */
86void __ntfs_error(const char *function, const struct super_block *sb,
87 const char *fmt, ...)
88{
89 struct va_format vaf;
90 va_list args;
91 int flen = 0;
92
93#ifndef DEBUG
94 if (!printk_ratelimit())
95 return;
96#endif
97 if (function)
98 flen = strlen(function);
99 va_start(args, fmt);
100 vaf.fmt = fmt;
101 vaf.va = &args;
102 if (sb)
103 pr_err("(device %s): %s(): %pV\n",
104 sb->s_id, flen ? function : "", &vaf);
105 else
106 pr_err("%s(): %pV\n", flen ? function : "", &vaf);
107 va_end(args);
108}
109
110#ifdef DEBUG
111
112/* If 1, output debug messages, and if 0, don't. */
113int debug_msgs = 0;
114
115void __ntfs_debug(const char *file, int line, const char *function,
116 const char *fmt, ...)
117{
118 struct va_format vaf;
119 va_list args;
120 int flen = 0;
121
122 if (!debug_msgs)
123 return;
124 if (function)
125 flen = strlen(function);
126 va_start(args, fmt);
127 vaf.fmt = fmt;
128 vaf.va = &args;
129 pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);
130 va_end(args);
131}
132
133/* Dump a runlist. Caller has to provide synchronisation for @rl. */
134void ntfs_debug_dump_runlist(const runlist_element *rl)
135{
136 int i;
137 const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED",
138 "LCN_ENOENT ", "LCN_unknown " };
139
140 if (!debug_msgs)
141 return;
142 pr_debug("Dumping runlist (values in hex):\n");
143 if (!rl) {
144 pr_debug("Run list not present.\n");
145 return;
146 }
147 pr_debug("VCN LCN Run length\n");
148 for (i = 0; ; i++) {
149 LCN lcn = (rl + i)->lcn;
150
151 if (lcn < (LCN)0) {
152 int index = -lcn - 1;
153
154 if (index > -LCN_ENOENT - 1)
155 index = 3;
156 pr_debug("%-16Lx %s %-16Lx%s\n",
157 (long long)(rl + i)->vcn, lcn_str[index],
158 (long long)(rl + i)->length,
159 (rl + i)->length ? "" :
160 " (runlist end)");
161 } else
162 pr_debug("%-16Lx %-16Lx %-16Lx%s\n",
163 (long long)(rl + i)->vcn,
164 (long long)(rl + i)->lcn,
165 (long long)(rl + i)->length,
166 (rl + i)->length ? "" :
167 " (runlist end)");
168 if (!(rl + i)->length)
169 break;
170 }
171}
172
173#endif