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 <stdbool.h>
  27 #include <stddef.h>
  28
  29 #include "attr.h"
  30
  31
  32 /* -------------------------------------------------------------------------- **
  33  * Debugging code.  See also debug.c
  34  */
  35
  36 /* the maximum debug level to compile into the code. This assumes a good
  37    optimising compiler that can remove unused code
  38    for embedded or low-memory systems set this to a value like 2 to get
  39    only important messages. This gives *much* smaller binaries
  40 */
  41 #ifndef MAX_DEBUG_LEVEL
  42 #define MAX_DEBUG_LEVEL 1000
  43 #endif
  44
  45 bool dbgtext_va(const char *, va_list ap) PRINTF_ATTRIBUTE(1,0);
  46 bool dbgtext( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
  47 bool dbghdrclass( int level, int cls, const char *location, const char *func);
  48 bool dbghdr( int level, const char *location, const char *func);
  49
  50 /*
  51  * Redefine DEBUGLEVEL because so we don't have to change every source file
  52  * that *unnecessarily* references it.
  53  */
  54 #define DEBUGLEVEL DEBUGLEVEL_CLASS[DBGC_ALL]
  55
  56 /*
  57  * Define all new debug classes here. A class is represented by an entry in
  58  * the DEBUGLEVEL_CLASS array. Index zero of this arrray is equivalent to the
  59  * old DEBUGLEVEL. Any source file that does NOT add the following lines:
  60  *
  61  *   #undef  DBGC_CLASS
  62  *   #define DBGC_CLASS DBGC_<your class name here>
  63  *
  64  * at the start of the file (after #include "includes.h") will default to
  65  * using index zero, so it will behaive just like it always has.
  66  */
  67 #define DBGC_ALL                0 /* index equivalent to DEBUGLEVEL */
  68
  69 #define DBGC_TDB                1
  70 #define DBGC_PRINTDRIVERS       2
  71 #define DBGC_LANMAN             3
  72 #define DBGC_SMB                4
  73 #define DBGC_RPC_PARSE          5
  74 #define DBGC_RPC_SRV            6
  75 #define DBGC_RPC_CLI            7
  76 #define DBGC_PASSDB             8
  77 #define DBGC_SAM                9
  78 #define DBGC_AUTH               10
  79 #define DBGC_WINBIND            11
  80 #define DBGC_VFS                12
  81 #define DBGC_IDMAP              13
  82 #define DBGC_QUOTA              14
  83 #define DBGC_ACLS               15
  84 #define DBGC_LOCKING            16
  85 #define DBGC_MSDFS              17
  86 #define DBGC_DMAPI              18
  87 #define DBGC_REGISTRY           19
  88 #define DBGC_SCAVENGER          20
  89 #define DBGC_DNS                21
  90 #define DBGC_LDB                22
  91
  92 /* Always ensure this is updated when new fixed classes area added, to ensure the array in debug.c is the right size */
  93 #define DBGC_MAX_FIXED          22
  94
  95 /* So you can define DBGC_CLASS before including debug.h */
  96 #ifndef DBGC_CLASS
  97 #define DBGC_CLASS            0     /* override as shown above */
  98 #endif
  99
 100 extern int  *DEBUGLEVEL_CLASS;
 101
 102 /* Debugging macros
 103  *
 104  * DEBUGLVL()
 105  *   If the 'file specific' debug class level >= level OR the system-wide
 106  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 107  *   generate a header using the default macros for file, line, and
 108  *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 109  *
 110  *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 111  *
 112  * DEBUG()
 113  *   If the 'file specific' debug class level >= level OR the system-wide
 114  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 115  *   generate a header using the default macros for file, line, and
 116  *   function name. Each call to DEBUG() generates a new header *unless* the
 117  *   previous debug output was unterminated (i.e. no '\n').
 118  *   See debug.c:dbghdr() for more info.
 119  *
 120  *   Example: DEBUG( 2, ("Some text and a value %d.\n", value) );
 121  *
 122  * DEBUGC()
 123  *   If the 'macro specified' debug class level >= level OR the system-wide
 124  *   DEBUGLEVEL (synomym 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: DEBUGC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 131  *
 132  *  DEBUGADD(), DEBUGADDC()
 133  *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 134  *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening
 135  *    header.
 136  *
 137  *    Example: DEBUGADD( 2, ("Some text and a value %d.\n", value) );
 138  *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 139  *
 140  * Note: If the debug class has not be redeined (see above) then the optimizer
 141  * will remove the extra conditional test.
 142  */
 143
 144 /*
 145  * From talloc.c:
 146  */
 147
 148 /* these macros gain us a few percent of speed on gcc */
 149 #if (__GNUC__ >= 3)
 150 /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
 151    as its first argument */
 152 #ifndef likely
 153 #define likely(x)   __builtin_expect(!!(x), 1)
 154 #endif
 155 #ifndef unlikely
 156 #define unlikely(x) __builtin_expect(!!(x), 0)
 157 #endif
 158 #else
 159 #ifndef likely
 160 #define likely(x) (x)
 161 #endif
 162 #ifndef unlikely
 163 #define unlikely(x) (x)
 164 #endif
 165 #endif
 166
 167 #define CHECK_DEBUGLVL( level ) \
 168   ( ((level) <= MAX_DEBUG_LEVEL) && \
 169     unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level)))
 170
 171 #define CHECK_DEBUGLVLC( dbgc_class, level ) \
 172   ( ((level) <= MAX_DEBUG_LEVEL) && \
 173     unlikely(DEBUGLEVEL_CLASS[ dbgc_class ] >= (level)))
 174
 175 #define DEBUGLVL( level ) \
 176   ( CHECK_DEBUGLVL(level) \
 177    && dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ ) )
 178
 179 #define DEBUGLVLC( dbgc_class, level ) \
 180   ( CHECK_DEBUGLVLC( dbgc_class, level ) \
 181    && dbghdrclass( level, dbgc_class, __location__, __FUNCTION__ ) )
 182
 183 #define DEBUG( level, body ) \
 184   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 185           unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))           \
 186        && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
 187        && (dbgtext body) )
 188
 189 #define DEBUGC( dbgc_class, level, body ) \
 190   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 191           unlikely(DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))           \
 192        && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
 193        && (dbgtext body) )
 194
 195 #define DEBUGADD( level, body ) \
 196   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 197           unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))   \
 198        && (dbgtext body) )
 199
 200 #define DEBUGADDC( dbgc_class, level, body ) \
 201   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 202           unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))) \
 203        && (dbgtext body) )
 204
 205 /* Print a separator to the debug log. */
 206 #define DEBUGSEP(level)\
 207         DEBUG((level),("===============================================================\n"))
 208
 209 /* The following definitions come from lib/debug.c  */
 210
 211 /** Possible destinations for the debug log (in order of precedence -
 212  * once set to DEBUG_FILE, it is not possible to reset to DEBUG_STDOUT
 213  * for example.  This makes it easy to override for debug to stderr on
 214  * the command line, as the smb.conf cannot reset it back to
 215  * file-based logging */
 216 enum debug_logtype {
 217         DEBUG_DEFAULT_STDERR = 0,
 218         DEBUG_DEFAULT_STDOUT = 1,
 219         DEBUG_FILE = 2,
 220         DEBUG_STDOUT = 3,
 221         DEBUG_STDERR = 4,
 222         DEBUG_CALLBACK = 5
 223 };
 224
 225 struct debug_settings {
 226         size_t max_log_size;
 227         int syslog;
 228         bool syslog_only;
 229         bool timestamp_logs;
 230         bool debug_prefix_timestamp;
 231         bool debug_hires_timestamp;
 232         bool debug_pid;
 233         bool debug_uid;
 234         bool debug_class;
 235 };
 236
 237 void setup_logging(const char *prog_name, enum debug_logtype new_logtype);
 238
 239 void debug_close_dbf(void);
 240 void gfree_debugsyms(void);
 241 int debug_add_class(const char *classname);
 242 int debug_lookup_classname(const char *classname);
 243 bool debug_parse_levels(const char *params_str);
 244 void debug_setup_talloc_log(void);
 245 void debug_set_logfile(const char *name);
 246 void debug_set_settings(struct debug_settings *settings);
 247 bool reopen_logs_internal( void );
 248 void force_check_log_size( void );
 249 bool need_to_check_log_size( void );
 250 void check_log_size( void );
 251 void dbgflush( void );
 252 bool dbghdrclass(int level, int cls, const char *location, const char *func);
 253 bool dbghdr(int level, const char *location, const char *func);
 254 bool debug_get_output_is_stderr(void);
 255 bool debug_get_output_is_stdout(void);
 256 void debug_schedule_reopen_logs(void);
 257 char *debug_list_class_names_and_levels(void);
 258
 259 typedef void (*debug_callback_fn)(void *private_ptr, int level, const char *msg);
 260
 261 /**
 262    Set a callback for all debug messages.  Use in dlz_bind9 to push output to the bind logs
 263  */
 264 void debug_set_callback(void *private_ptr, debug_callback_fn fn);
 265
 266 #endif /* _SAMBA_DEBUG_H */