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b=17167 libcfs: ensure all libcfs exported symbols to have cfs_ prefix
[fs/lustre-release.git] / libcfs / include / libcfs / libcfs_debug.h
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
30  * Use is subject to license terms.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * libcfs/include/libcfs/libcfs_debug.h
37  *
38  * Debug messages and assertions
39  *
40  */
41
42 #ifndef __LIBCFS_DEBUG_H__
43 #define __LIBCFS_DEBUG_H__
44
45 /*
46  *  Debugging
47  */
48 extern unsigned int libcfs_subsystem_debug;
49 extern unsigned int libcfs_stack;
50 extern unsigned int libcfs_debug;
51 extern unsigned int libcfs_printk;
52 extern unsigned int libcfs_console_ratelimit;
53 extern unsigned int libcfs_watchdog_ratelimit;
54 extern cfs_duration_t libcfs_console_max_delay;
55 extern cfs_duration_t libcfs_console_min_delay;
56 extern unsigned int libcfs_console_backoff;
57 extern unsigned int libcfs_debug_binary;
58 extern char libcfs_debug_file_path_arr[1024];
59
60 int libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys);
61 int libcfs_debug_str2mask(int *mask, const char *str, int is_subsys);
62
63 /* Has there been an LBUG? */
64 extern unsigned int libcfs_catastrophe;
65 extern unsigned int libcfs_panic_on_lbug;
66
67 /**
68  * Format for debug message headers
69  */
70 struct ptldebug_header {
71         __u32 ph_len;
72         __u32 ph_flags;
73         __u32 ph_subsys;
74         __u32 ph_mask;
75         __u32 ph_cpu_id;
76         __u32 ph_sec;
77         __u64 ph_usec;
78         __u32 ph_stack;
79         __u32 ph_pid;
80         __u32 ph_extern_pid;
81         __u32 ph_line_num;
82 } __attribute__((packed));
83
84
85 #define PH_FLAG_FIRST_RECORD 1
86
87 /* Debugging subsystems (32 bits, non-overlapping) */
88 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
89 #define S_UNDEFINED   0x00000001
90 #define S_MDC         0x00000002
91 #define S_MDS         0x00000004
92 #define S_OSC         0x00000008
93 #define S_OST         0x00000010
94 #define S_CLASS       0x00000020
95 #define S_LOG         0x00000040
96 #define S_LLITE       0x00000080
97 #define S_RPC         0x00000100
98 #define S_MGMT        0x00000200
99 #define S_LNET        0x00000400
100 #define S_LND         0x00000800 /* ALL LNDs */
101 #define S_PINGER      0x00001000
102 #define S_FILTER      0x00002000
103 /* unused */
104 #define S_ECHO        0x00008000
105 #define S_LDLM        0x00010000
106 #define S_LOV         0x00020000
107 #define S_LQUOTA      0x00040000
108 /* unused */
109 /* unused */
110 /* unused */
111 /* unused */
112 #define S_LMV         0x00800000 /* b_new_cmd */
113 /* unused */
114 #define S_SEC         0x02000000 /* upcall cache */
115 #define S_GSS         0x04000000 /* b_new_cmd */
116 /* unused */
117 #define S_MGC         0x10000000
118 #define S_MGS         0x20000000
119 #define S_FID         0x40000000 /* b_new_cmd */
120 #define S_FLD         0x80000000 /* b_new_cmd */
121 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
122
123 /* Debugging masks (32 bits, non-overlapping) */
124 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
125 #define D_TRACE       0x00000001 /* ENTRY/EXIT markers */
126 #define D_INODE       0x00000002
127 #define D_SUPER       0x00000004
128 #define D_EXT2        0x00000008 /* anything from ext2_debug */
129 #define D_MALLOC      0x00000010 /* print malloc, free information */
130 #define D_CACHE       0x00000020 /* cache-related items */
131 #define D_INFO        0x00000040 /* general information */
132 #define D_IOCTL       0x00000080 /* ioctl related information */
133 #define D_NETERROR    0x00000100 /* network errors */
134 #define D_NET         0x00000200 /* network communications */
135 #define D_WARNING     0x00000400 /* CWARN(...) == CDEBUG (D_WARNING, ...) */
136 #define D_BUFFS       0x00000800
137 #define D_OTHER       0x00001000
138 #define D_DENTRY      0x00002000
139 #define D_NETTRACE    0x00004000
140 #define D_PAGE        0x00008000 /* bulk page handling */
141 #define D_DLMTRACE    0x00010000
142 #define D_ERROR       0x00020000 /* CERROR(...) == CDEBUG (D_ERROR, ...) */
143 #define D_EMERG       0x00040000 /* CEMERG(...) == CDEBUG (D_EMERG, ...) */
144 #define D_HA          0x00080000 /* recovery and failover */
145 #define D_RPCTRACE    0x00100000 /* for distributed debugging */
146 #define D_VFSTRACE    0x00200000
147 #define D_READA       0x00400000 /* read-ahead */
148 #define D_MMAP        0x00800000
149 #define D_CONFIG      0x01000000
150 #define D_CONSOLE     0x02000000
151 #define D_QUOTA       0x04000000
152 #define D_SEC         0x08000000
153 /* keep these in sync with lnet/{utils,libcfs}/debug.c */
154
155 #define D_CANTMASK   (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
156
157 #ifndef DEBUG_SUBSYSTEM
158 # define DEBUG_SUBSYSTEM S_UNDEFINED
159 #endif
160
161 #define CDEBUG_DEFAULT_MAX_DELAY (cfs_time_seconds(600))         /* jiffies */
162 #define CDEBUG_DEFAULT_MIN_DELAY ((cfs_time_seconds(1) + 1) / 2) /* jiffies */
163 #define CDEBUG_DEFAULT_BACKOFF   2
164 typedef struct {
165         cfs_time_t      cdls_next;
166         int             cdls_count;
167         cfs_duration_t  cdls_delay;
168 } cfs_debug_limit_state_t;
169
170 #if defined(__KERNEL__) || (defined(__arch_lib__) && !defined(LUSTRE_UTILS))
171
172 #ifdef CDEBUG_ENABLED
173
174 /**
175  * Filters out logging messages based on mask and subsystem.
176  */
177 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
178 {
179         return mask & D_CANTMASK ||
180                 ((libcfs_debug & mask) && (libcfs_subsystem_debug & subsystem));
181 }
182
183 #define __CDEBUG(cdls, mask, format, ...)                               \
184 do {                                                                    \
185         CFS_CHECK_STACK();                                              \
186                                                                         \
187         if (cfs_cdebug_show(mask, DEBUG_SUBSYSTEM))                     \
188                 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, mask,           \
189                                  __FILE__, __FUNCTION__, __LINE__,      \
190                                  format, ## __VA_ARGS__);               \
191 } while (0)
192
193 #define CDEBUG(mask, format, ...) __CDEBUG(NULL, mask, format, ## __VA_ARGS__)
194
195 #define CDEBUG_LIMIT(mask, format, ...)         \
196 do {                                            \
197         static cfs_debug_limit_state_t cdls;    \
198                                                 \
199         __CDEBUG(&cdls, mask, format, ## __VA_ARGS__);\
200 } while (0)
201
202 #else /* !CDEBUG_ENABLED */
203 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
204 {
205         return 0;
206 }
207 #define CDEBUG(mask, format, ...) (void)(0)
208 #define CDEBUG_LIMIT(mask, format, ...) (void)(0)
209 #warning "CDEBUG IS DISABLED. THIS SHOULD NEVER BE DONE FOR PRODUCTION!"
210 #endif
211
212 #else /* !__KERNEL__ && (!__arch_lib__ || LUSTRE_UTILS) */
213
214 #define CDEBUG(mask, format, ...)                                       \
215 do {                                                                    \
216         if (((mask) & D_CANTMASK) != 0)                                 \
217                 fprintf(stderr, "(%s:%d:%s()) " format,                 \
218                         __FILE__, __LINE__, __FUNCTION__, ## __VA_ARGS__);\
219 } while (0)
220
221 #define CDEBUG_LIMIT CDEBUG
222
223 #endif /* !__KERNEL__ ... */
224
225
226 #define CWARN(format, ...)          CDEBUG_LIMIT(D_WARNING, format, ## __VA_ARGS__)
227 #define CERROR(format, ...)         CDEBUG_LIMIT(D_ERROR, format, ## __VA_ARGS__)
228 #define CEMERG(format, ...)         CDEBUG_LIMIT(D_EMERG, format, ## __VA_ARGS__)
229
230 #define LCONSOLE(mask, format, ...) CDEBUG(D_CONSOLE | (mask), format, ## __VA_ARGS__)
231 #define LCONSOLE_INFO(format, ...)  CDEBUG_LIMIT(D_CONSOLE, format, ## __VA_ARGS__)
232 #define LCONSOLE_WARN(format, ...)  CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## __VA_ARGS__)
233 #define LCONSOLE_ERROR_MSG(errnum, format, ...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, \
234                            "%x-%x: " format, errnum, LERRCHKSUM(errnum), ## __VA_ARGS__)
235 #define LCONSOLE_ERROR(format, ...) LCONSOLE_ERROR_MSG(0x00, format, ## __VA_ARGS__)
236
237 #define LCONSOLE_EMERG(format, ...) CDEBUG(D_CONSOLE | D_EMERG, format, ## __VA_ARGS__)
238
239 #ifdef CDEBUG_ENABLED
240
241 #define GOTO(label, rc)                                                 \
242 do {                                                                    \
243         long_ptr_t GOTO__ret = (long_ptr_t)(rc);                        \
244         CDEBUG(D_TRACE,"Process leaving via %s (rc=" LPLU " : " LPLD    \
245                " : " LPLX ")\n", #label, (ulong_ptr_t)GOTO__ret,        \
246                GOTO__ret, GOTO__ret);                                   \
247         goto label;                                                     \
248 } while (0)
249 #else
250 #define GOTO(label, rc) do { ((void)(rc)); goto label; } while (0)
251 #endif
252
253 #ifdef CDEBUG_ENTRY_EXIT
254
255 /*
256  * if rc == NULL, we need to code as RETURN((void *)NULL), otherwise
257  * there will be a warning in osx.
258  */
259 #if defined(__GNUC__)
260 #define RETURN(rc)                                                      \
261 do {                                                                    \
262         typeof(rc) RETURN__ret = (rc);                                  \
263         CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n",       \
264                (long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
265         EXIT_NESTING;                                                   \
266         return RETURN__ret;                                             \
267 } while (0)
268 #elif defined(_MSC_VER)
269 #define RETURN(rc)                                                      \
270 do {                                                                    \
271         CDEBUG(D_TRACE, "Process leaving.\n");                          \
272         EXIT_NESTING;                                                   \
273         return (rc);                                                    \
274 } while (0)
275 #else
276 # error "Unkown compiler"
277 #endif /* __GNUC__ */
278
279 #define ENTRY                                                           \
280 ENTRY_NESTING;                                                          \
281 do {                                                                    \
282         CDEBUG(D_TRACE, "Process entered\n");                           \
283 } while (0)
284
285 #define EXIT                                                            \
286 do {                                                                    \
287         CDEBUG(D_TRACE, "Process leaving\n");                           \
288         EXIT_NESTING;                                                   \
289 } while(0)
290 #else /* !CDEBUG_ENTRY_EXIT */
291
292 #define RETURN(rc) return (rc)
293 #define ENTRY                           do { } while (0)
294 #define EXIT                            do { } while (0)
295
296 #endif /* !CDEBUG_ENTRY_EXIT */
297
298 #define RETURN_EXIT                                                     \
299 do {                                                                    \
300         EXIT_NESTING;                                                   \
301         return;                                                         \
302 } while (0)
303
304 struct libcfs_debug_msg_data {
305         cfs_debug_limit_state_t *msg_cdls;
306         int                      msg_subsys;
307         const char              *msg_file;
308         const char              *msg_fn;
309         int                      msg_line;
310 };
311
312 #define DEBUG_MSG_DATA_INIT(cdls, subsystem, file, func, ln ) { \
313         /* msg_cdls */          (cdls),       \
314         /* msg_subsys */        (subsystem),  \
315         /* msg_file */          (file),       \
316         /* msg_fn */            (func),       \
317         /* msg_line */          (ln)          \
318     }
319
320
321 extern int libcfs_debug_vmsg2(cfs_debug_limit_state_t *cdls,
322                               int subsys, int mask,
323                               const char *file, const char *fn, const int line,
324                               const char *format1, va_list args,
325                               const char *format2, ...)
326         __attribute__ ((format (printf, 9, 10)));
327
328 #define libcfs_debug_vmsg(cdls, subsys, mask, file, fn, line, format, args)   \
329     libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,format,args,NULL,NULL)
330
331 #define libcfs_debug_msg(cdls, subsys, mask, file, fn, line, format, ...)    \
332     libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,NULL,NULL,format, ## __VA_ARGS__)
333
334 #define cdebug_va(cdls, mask, file, func, line, fmt, args)      do {          \
335         CFS_CHECK_STACK();                                                    \
336                                                                               \
337         if (cfs_cdebug_show(mask, DEBUG_SUBSYSTEM))                           \
338                 libcfs_debug_vmsg(cdls, DEBUG_SUBSYSTEM, (mask),              \
339                                   (file), (func), (line), fmt, args);         \
340 } while(0)
341
342 #define cdebug(cdls, mask, file, func, line, fmt, ...) do {                   \
343         CFS_CHECK_STACK();                                                    \
344                                                                               \
345         if (cfs_cdebug_show(mask, DEBUG_SUBSYSTEM))                           \
346                 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, (mask),               \
347                                  (file), (func), (line), fmt, ## __VA_ARGS__);\
348 } while(0)
349
350 extern void libcfs_assertion_failed(const char *expr, const char *file,
351                                     const char *fn, const int line);
352
353 /* one more external symbol that tracefile provides: */
354 extern int cfs_trace_copyout_string(char *usr_buffer, int usr_buffer_nob,
355                                     const char *knl_buffer, char *append);
356
357
358 #if defined(HAVE_BGL_SUPPORT)
359 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "/bgl/ion/tmp/lustre-log"
360 #elif defined(__arch_um__)
361 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "/r/tmp/lustre-log"
362 #elif defined(__WINNT__)
363 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "\\SystemRoot\\temp\\lustre-log"
364 #else
365 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "/tmp/lustre-log"
366 #endif
367
368 #endif  /* __LIBCFS_DEBUG_H__ */