1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __BTRFS_MESSAGES_H__
#define __BTRFS_MESSAGES_H__
#include "kerncompat.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
/*
* Workaround for custom format %pV that may not be supported on all libcs.
*/
#if defined(HAVE_PRINTF_H) \
&& defined(HAVE_REGISTER_PRINTF_SPECIFIER) \
&& defined(HAVE_REGISTER_PRINTF_MODIFIER)
#define DECLARE_PV(name) struct va_format name
#define PV_FMT "%pV"
#define PV_VAL(va) &va
#define PV_ASSIGN(_va, _fmt, _args) ({ _va.fmt = (_fmt); _va.va = &(_args); })
#include <printf.h>
#else
#define PV_WORKAROUND
#define DECLARE_PV(name) char name[1024]
#define PV_FMT "%s"
#define PV_VAL(va) va
#define PV_ASSIGN(_va, _fmt, _args) vsnprintf(_va, 1024, _fmt, _args)
#endif
#ifdef DEBUG_VERBOSE_ERROR
#define PRINT_VERBOSE_ERROR fprintf(stderr, "%s:%d:", __FILE__, __LINE__)
#else
#define PRINT_VERBOSE_ERROR
#endif
#ifdef DEBUG_TRACE_ON_ERROR
#define PRINT_TRACE_ON_ERROR print_trace()
#else
#define PRINT_TRACE_ON_ERROR do { } while (0)
#endif
#ifdef DEBUG_ABORT_ON_ERROR
#define DO_ABORT_ON_ERROR abort()
#else
#define DO_ABORT_ON_ERROR do { } while (0)
#endif
#ifndef BTRFS_DISABLE_BACKTRACE
static inline void assert_trace(const char *assertion, const char *filename,
const char *func, unsigned line, long val)
{
if (val)
return;
fprintf(stderr,
"%s:%d: %s: Assertion `%s` failed, value %ld\n",
filename, line, func, assertion, val);
#ifndef BTRFS_DISABLE_BACKTRACE
print_trace();
#endif
abort();
exit(1);
}
#define UASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
#else
#define UASSERT(c) assert(c)
#endif
#define PREFIX_ERROR "ERROR: "
#define PREFIX_WARNING "WARNING: "
#define __btrfs_msg(prefix, fmt, ...) \
do { \
fputs((prefix), stderr); \
__btrfs_printf((fmt), ##__VA_ARGS__); \
fputc('\n', stderr); \
} while (0)
#define __btrfs_warning(fmt, ...) \
__btrfs_msg(PREFIX_WARNING, fmt, ##__VA_ARGS__)
#define __btrfs_error(fmt, ...) \
__btrfs_msg(PREFIX_ERROR, fmt, ##__VA_ARGS__)
#define internal_error(fmt, ...) \
do { \
__btrfs_msg("INTERNAL " PREFIX_ERROR, fmt, ##__VA_ARGS__); \
print_trace(); \
} while (0)
#define error(fmt, ...) \
do { \
PRINT_TRACE_ON_ERROR; \
PRINT_VERBOSE_ERROR; \
__btrfs_error((fmt), ##__VA_ARGS__); \
DO_ABORT_ON_ERROR; \
} while (0)
#define error_on(cond, fmt, ...) \
do { \
if ((cond)) { \
PRINT_TRACE_ON_ERROR; \
PRINT_VERBOSE_ERROR; \
__btrfs_error((fmt), ##__VA_ARGS__); \
DO_ABORT_ON_ERROR; \
} \
} while (0)
#define error_btrfs_util(err) \
do { \
const char *errno_str = strerror(errno); \
const char *lib_str = btrfs_util_strerror(err); \
PRINT_TRACE_ON_ERROR; \
PRINT_VERBOSE_ERROR; \
if (lib_str && strcmp(errno_str, lib_str) != 0) \
__btrfs_error("%s: %m", lib_str); \
else \
__btrfs_error("%m"); \
DO_ABORT_ON_ERROR; \
} while (0)
#define warning(fmt, ...) \
do { \
PRINT_TRACE_ON_ERROR; \
PRINT_VERBOSE_ERROR; \
__btrfs_warning((fmt), ##__VA_ARGS__); \
} while (0)
#define warning_on(cond, fmt, ...) \
do { \
if ((cond)) { \
PRINT_TRACE_ON_ERROR; \
PRINT_VERBOSE_ERROR; \
__btrfs_warning((fmt), ##__VA_ARGS__); \
} \
} while (0)
__attribute__ ((format (printf, 1, 2)))
void __btrfs_printf(const char *fmt, ...);
__attribute__ ((format (printf, 2, 3)))
void btrfs_no_printk(const void *fs_info, const char *fmt, ...);
/*
* Level of messages that must be printed by default (in case the verbosity
* options haven't been set by the user) due to backward compatibility reasons
* where applications may expect the output.
*/
#define LOG_ALWAYS (-1)
/*
* Default level for any messages that should be printed by default, a one line
* summary or with more details. Applications should not rely on such messages.
*/
#define LOG_DEFAULT (1)
/*
* Information about the ongoing actions, high level description
*/
#define LOG_INFO (2)
/*
* Verbose description and individual steps of the previous level
*/
#define LOG_VERBOSE (3)
/*
* Anything that should not be normally printed but can be useful for debugging
*/
#define LOG_DEBUG (4)
__attribute__ ((format (printf, 2, 3)))
void pr_verbose(int level, const char *fmt, ...);
__attribute__ ((format (printf, 2, 3)))
void pr_stderr(int level, const char *fmt, ...);
/*
* Commonly used errors
*/
enum common_error {
ERROR_MSG_MEMORY,
ERROR_MSG_START_TRANS,
ERROR_MSG_COMMIT_TRANS,
ERROR_MSG_UNEXPECTED,
ERROR_MSG_READ,
ERROR_MSG_WRITE,
};
__attribute__ ((format (printf, 2, 3)))
void error_msg(enum common_error error, const char *msg, ...);
#endif
|
