4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * libcfs/include/libcfs/libcfs_debug.h
34 * Debug messages and assertions
38 #ifndef __LIBCFS_DEBUG_H__
39 #define __LIBCFS_DEBUG_H__
41 #include <uapi/linux/lnet/libcfs_debug.h>
46 extern unsigned int libcfs_subsystem_debug;
47 extern unsigned int libcfs_stack;
48 extern unsigned int libcfs_debug;
49 extern unsigned int libcfs_printk;
50 extern unsigned int libcfs_console_ratelimit;
51 extern unsigned int libcfs_console_max_delay;
52 extern unsigned int libcfs_console_min_delay;
53 extern unsigned int libcfs_console_backoff;
54 extern unsigned int libcfs_debug_binary;
55 extern char libcfs_debug_file_path_arr[PATH_MAX];
57 int libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys);
58 int libcfs_debug_str2mask(int *mask, const char *str, int is_subsys);
60 /* Has there been an LBUG? */
61 extern unsigned int libcfs_catastrophe;
62 extern unsigned int libcfs_panic_on_lbug;
64 #ifndef DEBUG_SUBSYSTEM
65 # define DEBUG_SUBSYSTEM S_UNDEFINED
68 #define CDEBUG_DEFAULT_MAX_DELAY (cfs_time_seconds(600)) /* jiffies */
69 #define CDEBUG_DEFAULT_MIN_DELAY ((cfs_time_seconds(1) + 1) / 2) /* jiffies */
70 #define CDEBUG_DEFAULT_BACKOFF 2
71 struct cfs_debug_limit_state {
72 unsigned long cdls_next;
73 unsigned int cdls_delay;
77 struct libcfs_debug_msg_data {
83 struct cfs_debug_limit_state *msg_cdls;
86 #define LIBCFS_DEBUG_MSG_DATA_INIT(data, mask, cdls) \
88 (data)->msg_subsys = DEBUG_SUBSYSTEM; \
89 (data)->msg_file = __FILE__; \
90 (data)->msg_fn = __func__; \
91 (data)->msg_line = __LINE__; \
92 (data)->msg_cdls = (cdls); \
93 (data)->msg_mask = (mask); \
96 #define LIBCFS_DEBUG_MSG_DATA_DECL(dataname, mask, cdls) \
97 static struct libcfs_debug_msg_data dataname = { \
98 .msg_subsys = DEBUG_SUBSYSTEM, \
99 .msg_file = __FILE__, \
100 .msg_fn = __func__, \
101 .msg_line = __LINE__, \
102 .msg_cdls = (cdls) }; \
103 dataname.msg_mask = (mask)
106 * Filters out logging messages based on mask and subsystem.
108 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
110 return mask & D_CANTMASK ||
111 ((libcfs_debug & mask) && (libcfs_subsystem_debug & subsystem));
114 #define __CDEBUG(cdls, mask, format, ...) \
116 static struct libcfs_debug_msg_data msgdata; \
118 CFS_CHECK_STACK(&msgdata, mask, cdls); \
120 if (cfs_cdebug_show(mask, DEBUG_SUBSYSTEM)) { \
121 LIBCFS_DEBUG_MSG_DATA_INIT(&msgdata, mask, cdls); \
122 libcfs_debug_msg(&msgdata, format, ## __VA_ARGS__); \
126 #define CDEBUG(mask, format, ...) __CDEBUG(NULL, mask, format, ## __VA_ARGS__)
128 #define CDEBUG_LIMIT(mask, format, ...) \
130 static struct cfs_debug_limit_state cdls; \
132 __CDEBUG(&cdls, mask, format, ## __VA_ARGS__); \
135 #define CWARN(format, ...) CDEBUG_LIMIT(D_WARNING, format, ## __VA_ARGS__)
136 #define CERROR(format, ...) CDEBUG_LIMIT(D_ERROR, format, ## __VA_ARGS__)
137 #define CNETERR(format, a...) CDEBUG_LIMIT(D_NETERROR, format, ## a)
138 #define CEMERG(format, ...) CDEBUG_LIMIT(D_EMERG, format, ## __VA_ARGS__)
140 #define LCONSOLE(mask, format, ...) CDEBUG(D_CONSOLE | (mask), format, ## __VA_ARGS__)
141 #define LCONSOLE_INFO(format, ...) CDEBUG_LIMIT(D_CONSOLE, format, ## __VA_ARGS__)
142 #define LCONSOLE_WARN(format, ...) CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## __VA_ARGS__)
143 #define LCONSOLE_ERROR_MSG(errnum, format, ...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, \
144 "%x-%x: " format, errnum, LERRCHKSUM(errnum), ## __VA_ARGS__)
145 #define LCONSOLE_ERROR(format, ...) LCONSOLE_ERROR_MSG(0x00, format, ## __VA_ARGS__)
147 #define LCONSOLE_EMERG(format, ...) CDEBUG(D_CONSOLE | D_EMERG, format, ## __VA_ARGS__)
149 int libcfs_debug_msg(struct libcfs_debug_msg_data *msgdata,
150 const char *format1, ...)
153 int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
155 va_list args, const char *format2, ...)
158 /* other external symbols that tracefile provides: */
159 int cfs_trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
160 const char __user *usr_buffer, int usr_buffer_nob);
161 int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
162 const char *knl_buffer, char *append);
164 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "/tmp/lustre-log"
166 #endif /* __LIBCFS_DEBUG_H__ */