lib/util/debug.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB debug stuff
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) John H Terpstra 1996-1998
   6    Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   7    Copyright (C) Paul Ashton 1998
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #ifndef _SAMBA_DEBUG_H
  24 #define _SAMBA_DEBUG_H
  25
  26 #include <stdint.h>
  27 #include <stdbool.h>
  28 #include <stddef.h>
  29 #include <stdarg.h>
  30 #include "attr.h"
  31
  32
  33 /* -------------------------------------------------------------------------- **
  34  * Debugging code.  See also debug.c
  35  */
  36
  37 /* the maximum debug level to compile into the code. This assumes a good
  38    optimising compiler that can remove unused code
  39    for embedded or low-memory systems set this to a value like 2 to get
  40    only important messages. This gives *much* smaller binaries
  41 */
  42 #ifndef MAX_DEBUG_LEVEL
  43 #define MAX_DEBUG_LEVEL 1000
  44 #endif
  45
  46 bool dbgtext_va(const char *, va_list ap) PRINTF_ATTRIBUTE(1,0);
  47 bool dbgtext( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
  48 bool dbghdrclass( int level, int cls, const char *location, const char *func);
  49 bool dbgsetclass(int level, int cls);
  50
  51 /*
  52  * Define all new debug classes here. A class is represented by an entry in
  53  * the DEBUGLEVEL_CLASS array. Index zero of this array is equivalent to the
  54  * old DEBUGLEVEL. Any source file that does NOT add the following lines:
  55  *
  56  *   #undef  DBGC_CLASS
  57  *   #define DBGC_CLASS DBGC_<your class name here>
  58  *
  59  * at the start of the file (after #include "includes.h") will default to
  60  * using index zero, so it will behaive just like it always has.
  61  */
  62 #define DBGC_ALL                0 /* index equivalent to DEBUGLEVEL */
  63
  64 #define DBGC_TDB                1
  65 #define DBGC_PRINTDRIVERS       2
  66 #define DBGC_LANMAN             3
  67 #define DBGC_SMB                4
  68 #define DBGC_RPC_PARSE          5
  69 #define DBGC_RPC_SRV            6
  70 #define DBGC_RPC_CLI            7
  71 #define DBGC_PASSDB             8
  72 #define DBGC_SAM                9
  73 #define DBGC_AUTH               10
  74 #define DBGC_WINBIND            11
  75 #define DBGC_VFS                12
  76 #define DBGC_IDMAP              13
  77 #define DBGC_QUOTA              14
  78 #define DBGC_ACLS               15
  79 #define DBGC_LOCKING            16
  80 #define DBGC_MSDFS              17
  81 #define DBGC_DMAPI              18
  82 #define DBGC_REGISTRY           19
  83 #define DBGC_SCAVENGER          20
  84 #define DBGC_DNS                21
  85 #define DBGC_LDB                22
  86 #define DBGC_TEVENT             23
  87 #define DBGC_AUTH_AUDIT         24
  88 #define DBGC_AUTH_AUDIT_JSON    25
  89 #define DBGC_KERBEROS           26
  90 #define DBGC_DRS_REPL           27
  91 #define DBGC_SMB2               28
  92 #define DBGC_SMB2_CREDITS       29
  93 #define DBGC_DSDB_AUDIT 30
  94 #define DBGC_DSDB_AUDIT_JSON    31
  95 #define DBGC_DSDB_PWD_AUDIT             32
  96 #define DBGC_DSDB_PWD_AUDIT_JSON        33
  97 #define DBGC_DSDB_TXN_AUDIT             34
  98 #define DBGC_DSDB_TXN_AUDIT_JSON        35
  99 #define DBGC_DSDB_GROUP_AUDIT   36
 100 #define DBGC_DSDB_GROUP_AUDIT_JSON      37
 101
 102 /* So you can define DBGC_CLASS before including debug.h */
 103 #ifndef DBGC_CLASS
 104 #define DBGC_CLASS            0     /* override as shown above */
 105 #endif
 106
 107 #define DEBUGLEVEL debuglevel_get()
 108
 109 #define debuglevel_get() debuglevel_get_class(DBGC_ALL)
 110 #define debuglevel_set(lvl) debuglevel_set_class(DBGC_ALL, (lvl))
 111
 112 /* Debugging macros
 113  *
 114  * DEBUGLVL()
 115  *   If the 'file specific' debug class level >= level OR the system-wide
 116  *   DEBUGLEVEL (synonym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 117  *   generate a header using the default macros for file, line, and
 118  *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 119  *
 120  *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 121  *
 122  * DEBUG()
 123  *   If the 'file specific' debug class level >= level OR the system-wide
 124  *   DEBUGLEVEL (synonym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 125  *   generate a header using the default macros for file, line, and
 126  *   function name. Each call to DEBUG() generates a new header *unless* the
 127  *   previous debug output was unterminated (i.e. no '\n').
 128  *   See debug.c:dbghdr() for more info.
 129  *
 130  *   Example: DEBUG( 2, ("Some text and a value %d.\n", value) );
 131  *
 132  * DEBUGC()
 133  *   If the 'macro specified' debug class level >= level OR the system-wide
 134  *   DEBUGLEVEL (synonym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 135  *   generate a header using the default macros for file, line, and
 136  *   function name. Each call to DEBUG() generates a new header *unless* the
 137  *   previous debug output was unterminated (i.e. no '\n').
 138  *   See debug.c:dbghdr() for more info.
 139  *
 140  *   Example: DEBUGC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 141  *
 142  * DEBUGADD(), DEBUGADDC()
 143  *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 144  *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening
 145  *    header.
 146  *
 147  *    Example: DEBUGADD( 2, ("Some text and a value %d.\n", value) );
 148  *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 149  *
 150  * Note: If the debug class has not be redefined (see above) then the optimizer
 151  * will remove the extra conditional test.
 152  */
 153
 154 /*
 155  * From talloc.c:
 156  */
 157
 158 /* these macros gain us a few percent of speed on gcc */
 159 #if (__GNUC__ >= 3)
 160 /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
 161    as its first argument */
 162 #ifndef likely
 163 #define likely(x)   __builtin_expect(!!(x), 1)
 164 #endif
 165 #ifndef unlikely
 166 #define unlikely(x) __builtin_expect(!!(x), 0)
 167 #endif
 168 #else
 169 #ifndef likely
 170 #define likely(x) (x)
 171 #endif
 172 #ifndef unlikely
 173 #define unlikely(x) (x)
 174 #endif
 175 #endif
 176
 177 int debuglevel_get_class(size_t idx);
 178 void debuglevel_set_class(size_t idx, int level);
 179
 180 #define CHECK_DEBUGLVL( level ) \
 181   ( ((level) <= MAX_DEBUG_LEVEL) && \
 182     unlikely(debuglevel_get_class(DBGC_CLASS) >= (level)))
 183
 184 #define CHECK_DEBUGLVLC( dbgc_class, level ) \
 185   ( ((level) <= MAX_DEBUG_LEVEL) && \
 186     unlikely(debuglevel_get_class(dbgc_class) >= (level)))
 187
 188 #define DEBUGLVL( level ) \
 189   ( CHECK_DEBUGLVL(level) \
 190    && dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ ) )
 191
 192 #define DEBUGLVLC( dbgc_class, level ) \
 193   ( CHECK_DEBUGLVLC( dbgc_class, level ) \
 194    && dbghdrclass( level, dbgc_class, __location__, __FUNCTION__ ) )
 195
 196 #define DEBUG( level, body ) \
 197   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 198        unlikely(debuglevel_get_class(DBGC_CLASS) >= (level))             \
 199        && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
 200        && (dbgtext body) )
 201
 202 /**
 203  * @brief DEBUGLF is same as DEBUG with explicit location and function arguments
 204  *
 205  * To be used when passing location and function of a caller appearig earlier in
 206  * the call stack instead of some helper function.
 207  *
 208  * @code
 209  *     DEBUGLF( 2, ("Some text.\n"), "foo.c:1", "foo" );
 210  *     DEBUGLF( 5, ("Some text.\n"), location, function );
 211  * @endcode
 212  *
 213  * @return void.
 214  */
 215 #define DEBUGLF( level, body, location, function ) \
 216   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 217        unlikely(debuglevel_get_class(DBGC_CLASS) >= (level))     \
 218        && (dbghdrclass( level, DBGC_CLASS, location, function )) \
 219        && (dbgtext body) )
 220
 221 #define DEBUGC( dbgc_class, level, body ) \
 222   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 223        unlikely(debuglevel_get_class(dbgc_class) >= (level))             \
 224        && (dbghdrclass( level, dbgc_class, __location__, __FUNCTION__ )) \
 225        && (dbgtext body) )
 226
 227 #define DEBUGADD( level, body ) \
 228   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 229        unlikely(debuglevel_get_class(DBGC_CLASS) >= (level)) \
 230        && (dbgsetclass(level, DBGC_CLASS))                   \
 231        && (dbgtext body) )
 232
 233 #define DEBUGADDC( dbgc_class, level, body ) \
 234   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 235        unlikely((debuglevel_get_class(dbgc_class) >= (level))) \
 236        && (dbgsetclass(level, dbgc_class))                     \
 237        && (dbgtext body) )
 238
 239 /* Print a separator to the debug log. */
 240 #define DEBUGSEP(level)\
 241         DEBUG((level),("===============================================================\n"))
 242
 243 /* Prefix messages with the function name */
 244 #define DBG_PREFIX(level, body ) \
 245         (void)( ((level) <= MAX_DEBUG_LEVEL) &&                 \
 246                 unlikely(debuglevel_get_class(DBGC_CLASS) >= (level))   \
 247                 && (dbghdrclass(level, DBGC_CLASS, __location__, __func__ )) \
 248                 && (dbgtext("%s: ", __func__))                          \
 249                 && (dbgtext body) )
 250
 251 /* Prefix messages with the function name - class specific */
 252 #define DBGC_PREFIX(dbgc_class, level, body ) \
 253         (void)( ((level) <= MAX_DEBUG_LEVEL) &&                 \
 254                 unlikely(debuglevel_get_class(dbgc_class) >= (level))   \
 255                 && (dbghdrclass(level, dbgc_class, __location__, __func__ )) \
 256                 && (dbgtext("%s: ", __func__))                          \
 257                 && (dbgtext body) )
 258
 259
 260 #ifdef DEVELOPER
 261 #define DBG_DEV(...) \
 262   (void)( (debug_developer_enabled())                           \
 263           && (dbgtext("%s:DEV:%d: ", __func__, getpid()))       \
 264           && (dbgtext(__VA_ARGS__)) )
 265 #else
 266 #define DBG_DEV(...) /* DBG_DEV was here */
 267 #endif
 268
 269 /*
 270  * Debug levels matching RFC 3164
 271  */
 272 #define DBGLVL_STARTUP_NOTICE    -1     /* startup notice */
 273 #define DBGLVL_ERR       0      /* error conditions */
 274 #define DBGLVL_WARNING   1      /* warning conditions */
 275 #define DBGLVL_NOTICE    3      /* normal, but significant, condition */
 276 #define DBGLVL_INFO      5      /* informational message */
 277 #define DBGLVL_DEBUG    10      /* debug-level message */
 278
 279 #define DBG_STARTUP_NOTICE(...) DBG_PREFIX(DBGLVL_STARTUP_NOTICE,       (__VA_ARGS__))
 280 #define DBG_ERR(...)            DBG_PREFIX(DBGLVL_ERR,          (__VA_ARGS__))
 281 #define DBG_WARNING(...)        DBG_PREFIX(DBGLVL_WARNING,      (__VA_ARGS__))
 282 #define DBG_NOTICE(...)         DBG_PREFIX(DBGLVL_NOTICE,       (__VA_ARGS__))
 283 #define DBG_INFO(...)           DBG_PREFIX(DBGLVL_INFO,         (__VA_ARGS__))
 284 #define DBG_DEBUG(...)          DBG_PREFIX(DBGLVL_DEBUG,        (__VA_ARGS__))
 285
 286 #define DBGC_ERR(dbgc_class, ...)       DBGC_PREFIX(dbgc_class, \
 287                                                 DBGLVL_ERR, (__VA_ARGS__))
 288 #define DBGC_WARNING(dbgc_class, ...)   DBGC_PREFIX(dbgc_class, \
 289                                                 DBGLVL_WARNING, (__VA_ARGS__))
 290 #define DBGC_NOTICE(dbgc_class, ...)    DBGC_PREFIX(dbgc_class, \
 291                                                 DBGLVL_NOTICE,  (__VA_ARGS__))
 292 #define DBGC_INFO(dbgc_class, ...)      DBGC_PREFIX(dbgc_class, \
 293                                                 DBGLVL_INFO,    (__VA_ARGS__))
 294 #define DBGC_DEBUG(dbgc_class, ...)     DBGC_PREFIX(dbgc_class, \
 295                                                 DBGLVL_DEBUG,   (__VA_ARGS__))
 296
 297 #define D_ERR(...)              DEBUG(DBGLVL_ERR,       (__VA_ARGS__))
 298 #define D_WARNING(...)          DEBUG(DBGLVL_WARNING,   (__VA_ARGS__))
 299 #define D_NOTICE(...)           DEBUG(DBGLVL_NOTICE,    (__VA_ARGS__))
 300 #define D_INFO(...)             DEBUG(DBGLVL_INFO,      (__VA_ARGS__))
 301 #define D_DEBUG(...)            DEBUG(DBGLVL_DEBUG,     (__VA_ARGS__))
 302
 303 #define DC_ERR(...)             DEBUGC(dbgc_class, \
 304                                         DBGLVL_ERR,     (__VA_ARGS__))
 305 #define DC_WARNING(...)         DEBUGC(dbgc_class, \
 306                                         DBGLVL_WARNING, (__VA_ARGS__))
 307 #define DC_NOTICE(...)          DEBUGC(dbgc_class, \
 308                                         DBGLVL_NOTICE,  (__VA_ARGS__))
 309 #define DC_INFO(...)            DEBUGC(dbgc_class, \
 310                                         DBGLVL_INFO,    (__VA_ARGS__))
 311 #define DC_DEBUG(...)           DEBUGC(dbgc_class, \
 312                                         DBGLVL_DEBUG,   (__VA_ARGS__))
 313
 314 /* The following definitions come from lib/debug.c  */
 315
 316 /**
 317  * Possible destinations for the debug log.
 318  *
 319  * Set via setup_logging(); higher values have precedence.
 320  */
 321 enum debug_logtype {
 322         DEBUG_DEFAULT_STDERR = 0,
 323         DEBUG_DEFAULT_STDOUT = 1,
 324         DEBUG_FILE = 2,
 325         DEBUG_STDOUT = 3,
 326         DEBUG_STDERR = 4,
 327         DEBUG_CALLBACK = 5
 328 };
 329
 330 enum debug_syslog_format {
 331         DEBUG_SYSLOG_FORMAT_NO = 0,
 332         DEBUG_SYSLOG_FORMAT_IN_LOGS = 1,
 333         DEBUG_SYSLOG_FORMAT_ALWAYS = 2,
 334 };
 335
 336 struct debug_settings {
 337         size_t max_log_size;
 338         bool timestamp_logs;
 339         bool debug_prefix_timestamp;
 340         bool debug_hires_timestamp;
 341         enum debug_syslog_format debug_syslog_format;
 342         bool debug_pid;
 343         bool debug_uid;
 344         bool debug_class;
 345         bool debug_no_stderr_redirect;
 346 };
 347
 348 void setup_logging(const char *prog_name, enum debug_logtype new_logtype);
 349
 350 void gfree_debugsyms(void);
 351 int debug_add_class(const char *classname);
 352 bool debug_parse_levels(const char *params_str);
 353 void debug_setup_talloc_log(void);
 354 void debug_set_logfile(const char *name);
 355 void debug_set_settings(struct debug_settings *settings,
 356                         const char *logging_param,
 357                         int syslog_level, bool syslog_only);
 358 void debug_set_hostname(const char *name);
 359 void debug_set_forced_log_priority(int forced_log_priority);
 360 bool reopen_logs_internal( void );
 361 void force_check_log_size( void );
 362 bool need_to_check_log_size( void );
 363 void check_log_size( void );
 364 void dbgflush( void );
 365 enum debug_logtype debug_get_log_type(void);
 366 bool debug_get_output_is_stderr(void);
 367 bool debug_get_output_is_stdout(void);
 368 void debug_schedule_reopen_logs(void);
 369 char *debug_list_class_names_and_levels(void);
 370 bool debug_developer_enabled(void);
 371 void debug_developer_enable(void);
 372 void debug_developer_disable(void);
 373
 374 typedef void (*debug_callback_fn)(void *private_ptr, int level, const char *msg);
 375
 376 /**
 377    Set a callback for all debug messages.  Use in dlz_bind9 to push output to the bind logs
 378  */
 379 void debug_set_callback(void *private_ptr, debug_callback_fn fn);
 380
 381 char *debug_get_ringbuf(void);
 382 size_t debug_get_ringbuf_size(void);
 383
 384 /* Explicitly set new traceid. The old id is returned. */
 385 uint64_t debug_traceid_set(uint64_t id);
 386
 387 /* Get the current traceid. */
 388 uint64_t debug_traceid_get(void);
 389
 390 size_t *debug_call_depth_addr(void);
 391
 392 #endif /* _SAMBA_DEBUG_H */