libcfs/include/libcfs/libcfs_debug.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  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 unsigned int libcfs_console_max_delay;
  55 extern unsigned int 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[PATH_MAX];
  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         __u16 ph_cpu_id;
  76         __u16 ph_type;
  77         __u32 ph_sec;
  78         __u64 ph_usec;
  79         __u32 ph_stack;
  80         __u32 ph_pid;
  81         __u32 ph_extern_pid;
  82         __u32 ph_line_num;
  83 } __attribute__((packed));
  84
  85
  86 #define PH_FLAG_FIRST_RECORD 1
  87
  88 /* Debugging subsystems (32 bits, non-overlapping) */
  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 #define S_OSD           0x00080000
 109 #define S_LFSCK         0x00100000
 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
 122 #define LIBCFS_DEBUG_SUBSYS_NAMES {                                     \
 123         "undefined", "mdc", "mds", "osc", "ost", "class", "log",        \
 124         "llite", "rpc", "mgmt", "lnet", "lnd", "pinger", "filter", "",  \
 125         "echo", "ldlm", "lov", "lquota", "osd", "lfsck", "", "", "lmv", \
 126          "", "sec", "gss", "", "mgc", "mgs", "fid", "fld", NULL }
 127
 128 /* Debugging masks (32 bits, non-overlapping) */
 129 #define D_TRACE         0x00000001 /* ENTRY/EXIT markers */
 130 #define D_INODE         0x00000002
 131 #define D_SUPER         0x00000004
 132 #define D_EXT2          0x00000008 /* anything from ext2_debug */
 133 #define D_MALLOC        0x00000010 /* print malloc, free information */
 134 #define D_CACHE         0x00000020 /* cache-related items */
 135 #define D_INFO          0x00000040 /* general information */
 136 #define D_IOCTL         0x00000080 /* ioctl related information */
 137 #define D_NETERROR      0x00000100 /* network errors */
 138 #define D_NET           0x00000200 /* network communications */
 139 #define D_WARNING       0x00000400 /* CWARN(...) == CDEBUG (D_WARNING, ...) */
 140 #define D_BUFFS         0x00000800
 141 #define D_OTHER         0x00001000
 142 #define D_DENTRY        0x00002000
 143 #define D_NETTRACE      0x00004000
 144 #define D_PAGE          0x00008000 /* bulk page handling */
 145 #define D_DLMTRACE      0x00010000
 146 #define D_ERROR         0x00020000 /* CERROR(...) == CDEBUG (D_ERROR, ...) */
 147 #define D_EMERG         0x00040000 /* CEMERG(...) == CDEBUG (D_EMERG, ...) */
 148 #define D_HA            0x00080000 /* recovery and failover */
 149 #define D_RPCTRACE      0x00100000 /* for distributed debugging */
 150 #define D_VFSTRACE      0x00200000
 151 #define D_READA         0x00400000 /* read-ahead */
 152 #define D_MMAP          0x00800000
 153 #define D_CONFIG        0x01000000
 154 #define D_CONSOLE       0x02000000
 155 #define D_QUOTA         0x04000000
 156 #define D_SEC           0x08000000
 157 #define D_LFSCK         0x10000000 /* For both OI scrub and LFSCK */
 158 #define D_HSM           0x20000000
 159
 160 #define LIBCFS_DEBUG_MASKS_NAMES {                                      \
 161         "trace", "inode", "super", "ext2", "malloc", "cache", "info",   \
 162         "ioctl", "neterror", "net", "warning", "buffs", "other",        \
 163         "dentry", "nettrace", "page", "dlmtrace", "error", "emerg",     \
 164         "ha", "rpctrace", "vfstrace", "reada", "mmap", "config",        \
 165         "console", "quota", "sec", "lfsck", "hsm", NULL }
 166
 167 #define D_CANTMASK   (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
 168
 169 #ifndef DEBUG_SUBSYSTEM
 170 # define DEBUG_SUBSYSTEM S_UNDEFINED
 171 #endif
 172
 173 #define CDEBUG_DEFAULT_MAX_DELAY (cfs_time_seconds(600))         /* jiffies */
 174 #define CDEBUG_DEFAULT_MIN_DELAY ((cfs_time_seconds(1) + 1) / 2) /* jiffies */
 175 #define CDEBUG_DEFAULT_BACKOFF   2
 176 typedef struct {
 177         cfs_time_t      cdls_next;
 178         unsigned int    cdls_delay;
 179         int             cdls_count;
 180 } cfs_debug_limit_state_t;
 181
 182 struct libcfs_debug_msg_data {
 183         const char               *msg_file;
 184         const char               *msg_fn;
 185         int                      msg_subsys;
 186         int                      msg_line;
 187         int                      msg_mask;
 188         cfs_debug_limit_state_t  *msg_cdls;
 189 };
 190
 191 #define LIBCFS_DEBUG_MSG_DATA_INIT(data, mask, cdls)        \
 192 do {                                                        \
 193         (data)->msg_subsys = DEBUG_SUBSYSTEM;               \
 194         (data)->msg_file   = __FILE__;                      \
 195         (data)->msg_fn     = __FUNCTION__;                  \
 196         (data)->msg_line   = __LINE__;                      \
 197         (data)->msg_cdls   = (cdls);                        \
 198         (data)->msg_mask   = (mask);                        \
 199 } while (0)
 200
 201 #define LIBCFS_DEBUG_MSG_DATA_DECL(dataname, mask, cdls)    \
 202         static struct libcfs_debug_msg_data dataname = {    \
 203                .msg_subsys = DEBUG_SUBSYSTEM,               \
 204                .msg_file   = __FILE__,                      \
 205                .msg_fn     = __FUNCTION__,                  \
 206                .msg_line   = __LINE__,                      \
 207                .msg_cdls   = (cdls)         };              \
 208         dataname.msg_mask   = (mask);
 209
 210 #if defined(__KERNEL__) || (defined(__arch_lib__) && !defined(LUSTRE_UTILS))
 211
 212 #ifdef CDEBUG_ENABLED
 213
 214 /**
 215  * Filters out logging messages based on mask and subsystem.
 216  */
 217 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
 218 {
 219         return mask & D_CANTMASK ||
 220                 ((libcfs_debug & mask) && (libcfs_subsystem_debug & subsystem));
 221 }
 222
 223 #define __CDEBUG(cdls, mask, format, ...)                               \
 224 do {                                                                    \
 225         static struct libcfs_debug_msg_data msgdata;                    \
 226                                                                         \
 227         CFS_CHECK_STACK(&msgdata, mask, cdls);                          \
 228                                                                         \
 229         if (cfs_cdebug_show(mask, DEBUG_SUBSYSTEM)) {                   \
 230                 LIBCFS_DEBUG_MSG_DATA_INIT(&msgdata, mask, cdls);       \
 231                 libcfs_debug_msg(&msgdata, format, ## __VA_ARGS__);     \
 232         }                                                               \
 233 } while (0)
 234
 235 #define CDEBUG(mask, format, ...) __CDEBUG(NULL, mask, format, ## __VA_ARGS__)
 236
 237 #define CDEBUG_LIMIT(mask, format, ...)         \
 238 do {                                            \
 239         static cfs_debug_limit_state_t cdls;    \
 240                                                 \
 241         __CDEBUG(&cdls, mask, format, ## __VA_ARGS__);\
 242 } while (0)
 243
 244 #else /* !CDEBUG_ENABLED */
 245 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
 246 {
 247         return 0;
 248 }
 249 #define CDEBUG(mask, format, ...) (void)(0)
 250 #define CDEBUG_LIMIT(mask, format, ...) (void)(0)
 251 #warning "CDEBUG IS DISABLED. THIS SHOULD NEVER BE DONE FOR PRODUCTION!"
 252 #endif
 253
 254 #else /* !__KERNEL__ && (!__arch_lib__ || LUSTRE_UTILS) */
 255 static inline int cfs_cdebug_show(unsigned int mask, unsigned int subsystem)
 256 {
 257         return 0;
 258 }
 259 #define CDEBUG(mask, format, ...)                                       \
 260 do {                                                                    \
 261         if (((mask) & D_CANTMASK) != 0)                                 \
 262                 fprintf(stderr, "(%s:%d:%s()) " format,                 \
 263                         __FILE__, __LINE__, __FUNCTION__, ## __VA_ARGS__);\
 264 } while (0)
 265
 266 #define CDEBUG_LIMIT CDEBUG
 267
 268 #endif /* !__KERNEL__ ... */
 269
 270
 271 #define CWARN(format, ...)          CDEBUG_LIMIT(D_WARNING, format, ## __VA_ARGS__)
 272 #define CERROR(format, ...)         CDEBUG_LIMIT(D_ERROR, format, ## __VA_ARGS__)
 273 #define CNETERR(format, a...)       CDEBUG_LIMIT(D_NETERROR, format, ## a)
 274 #define CEMERG(format, ...)         CDEBUG_LIMIT(D_EMERG, format, ## __VA_ARGS__)
 275
 276 #define LCONSOLE(mask, format, ...) CDEBUG(D_CONSOLE | (mask), format, ## __VA_ARGS__)
 277 #define LCONSOLE_INFO(format, ...)  CDEBUG_LIMIT(D_CONSOLE, format, ## __VA_ARGS__)
 278 #define LCONSOLE_WARN(format, ...)  CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## __VA_ARGS__)
 279 #define LCONSOLE_ERROR_MSG(errnum, format, ...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, \
 280                            "%x-%x: " format, errnum, LERRCHKSUM(errnum), ## __VA_ARGS__)
 281 #define LCONSOLE_ERROR(format, ...) LCONSOLE_ERROR_MSG(0x00, format, ## __VA_ARGS__)
 282
 283 #define LCONSOLE_EMERG(format, ...) CDEBUG(D_CONSOLE | D_EMERG, format, ## __VA_ARGS__)
 284
 285 #ifdef CDEBUG_ENABLED
 286
 287 void libcfs_log_goto(struct libcfs_debug_msg_data *, const char *, long_ptr_t);
 288 #define GOTO(label, rc)                                                 \
 289 do {                                                                    \
 290         if (cfs_cdebug_show(D_TRACE, DEBUG_SUBSYSTEM)) {                \
 291                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_TRACE, NULL);     \
 292                 libcfs_log_goto(&msgdata, #label, (long_ptr_t)(rc));    \
 293         } else {                                                        \
 294                 (void)(rc);                                             \
 295         }                                                               \
 296         goto label;                                                     \
 297 } while (0)
 298 #else
 299 #define GOTO(label, rc) do { ((void)(rc)); goto label; } while (0)
 300 #endif
 301
 302 #ifdef CDEBUG_ENTRY_EXIT
 303
 304 /*
 305  * if rc == NULL, we need to code as RETURN((void *)NULL), otherwise
 306  * there will be a warning in osx.
 307  */
 308 #if defined(__GNUC__)
 309
 310 long libcfs_log_return(struct libcfs_debug_msg_data *, long rc);
 311 #if BITS_PER_LONG > 32
 312 #define RETURN(rc)                                                      \
 313 do {                                                                    \
 314         EXIT_NESTING;                                                   \
 315         if (cfs_cdebug_show(D_TRACE, DEBUG_SUBSYSTEM)) {                \
 316                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_TRACE, NULL);     \
 317                 return (typeof(rc))libcfs_log_return(&msgdata,          \
 318                                                      (long)(rc));       \
 319         }                                                               \
 320                                                                         \
 321         return (rc);                                                    \
 322 } while (0)
 323 #else /* BITS_PER_LONG == 32 */
 324 /* We need an on-stack variable, because we cannot case a 32-bit pointer
 325  * directly to (long long) without generating a complier warning/error, yet
 326  * casting directly to (long) will truncate 64-bit return values. The log
 327  * values will print as 32-bit values, but they always have been. LU-1436
 328  */
 329 #define RETURN(rc)                                                      \
 330 do {                                                                    \
 331         EXIT_NESTING;                                                   \
 332         if (cfs_cdebug_show(D_TRACE, DEBUG_SUBSYSTEM)) {                \
 333                 typeof(rc) __rc = (rc);                                 \
 334                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_TRACE, NULL);     \
 335                 libcfs_log_return(&msgdata, (long_ptr_t)__rc);          \
 336                 return __rc;                                            \
 337         }                                                               \
 338                                                                         \
 339         return (rc);                                                    \
 340 } while (0)
 341 #endif /* BITS_PER_LONG > 32 */
 342
 343 #elif defined(_MSC_VER)
 344 #define RETURN(rc)                                                      \
 345 do {                                                                    \
 346         CDEBUG(D_TRACE, "Process leaving.\n");                          \
 347         EXIT_NESTING;                                                   \
 348         return (rc);                                                    \
 349 } while (0)
 350 #else
 351 # error "Unkown compiler"
 352 #endif /* __GNUC__ */
 353
 354 #define ENTRY                                                           \
 355 ENTRY_NESTING;                                                          \
 356 do {                                                                    \
 357         CDEBUG(D_TRACE, "Process entered\n");                           \
 358 } while (0)
 359
 360 #define EXIT                                                            \
 361 do {                                                                    \
 362         CDEBUG(D_TRACE, "Process leaving\n");                           \
 363         EXIT_NESTING;                                                   \
 364 } while(0)
 365 #else /* !CDEBUG_ENTRY_EXIT */
 366
 367 #define RETURN(rc) return (rc)
 368 #define ENTRY                           do { } while (0)
 369 #define EXIT                            do { } while (0)
 370
 371 #endif /* !CDEBUG_ENTRY_EXIT */
 372
 373 #define RETURN_EXIT                                                     \
 374 do {                                                                    \
 375         EXIT;                                                           \
 376         return;                                                         \
 377 } while (0)
 378
 379 extern int libcfs_debug_msg(struct libcfs_debug_msg_data *msgdata,
 380                             const char *format1, ...)
 381         __attribute__ ((format (printf, 2, 3)));
 382
 383 extern int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 384                               const char *format1,
 385                               va_list args, const char *format2, ...)
 386         __attribute__ ((format (printf, 4, 5)));
 387
 388 /* other external symbols that tracefile provides: */
 389 extern int cfs_trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
 390                                    const char *usr_buffer, int usr_buffer_nob);
 391 extern int cfs_trace_copyout_string(char *usr_buffer, int usr_buffer_nob,
 392                                     const char *knl_buffer, char *append);
 393
 394 #if defined(__WINNT__)
 395 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "\\SystemRoot\\temp\\lustre-log"
 396 #else
 397 #define LIBCFS_DEBUG_FILE_PATH_DEFAULT "/tmp/lustre-log"
 398 #endif
 399
 400 #endif  /* __LIBCFS_DEBUG_H__ */