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 #include <stdarg.h>
  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 #define DBGC_TEVENT             23
  92 #define DBGC_AUTH_AUDIT         24
  93 #define DBGC_AUTH_AUDIT_JSON    25
  94 #define DBGC_KERBEROS           26
  95 #define DBGC_DRS_REPL           27
  96
  97 /* So you can define DBGC_CLASS before including debug.h */
  98 #ifndef DBGC_CLASS
  99 #define DBGC_CLASS            0     /* override as shown above */
 100 #endif
 101
 102 extern int  *DEBUGLEVEL_CLASS;
 103
 104 /* Debugging macros
 105  *
 106  * DEBUGLVL()
 107  *   If the 'file specific' debug class level >= level OR the system-wide
 108  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 109  *   generate a header using the default macros for file, line, and
 110  *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 111  *
 112  *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 113  *
 114  * DEBUG()
 115  *   If the 'file specific' debug class level >= level OR the system-wide
 116  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 117  *   generate a header using the default macros for file, line, and
 118  *   function name. Each call to DEBUG() generates a new header *unless* the
 119  *   previous debug output was unterminated (i.e. no '\n').
 120  *   See debug.c:dbghdr() for more info.
 121  *
 122  *   Example: DEBUG( 2, ("Some text and a value %d.\n", value) );
 123  *
 124  * DEBUGC()
 125  *   If the 'macro specified' debug class level >= level OR the system-wide
 126  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 127  *   generate a header using the default macros for file, line, and
 128  *   function name. Each call to DEBUG() generates a new header *unless* the
 129  *   previous debug output was unterminated (i.e. no '\n').
 130  *   See debug.c:dbghdr() for more info.
 131  *
 132  *   Example: DEBUGC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 133  *
 134  *  DEBUGADD(), DEBUGADDC()
 135  *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 136  *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening
 137  *    header.
 138  *
 139  *    Example: DEBUGADD( 2, ("Some text and a value %d.\n", value) );
 140  *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 141  *
 142  * Note: If the debug class has not be redeined (see above) then the optimizer
 143  * will remove the extra conditional test.
 144  */
 145
 146 /*
 147  * From talloc.c:
 148  */
 149
 150 /* these macros gain us a few percent of speed on gcc */
 151 #if (__GNUC__ >= 3)
 152 /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
 153    as its first argument */
 154 #ifndef likely
 155 #define likely(x)   __builtin_expect(!!(x), 1)
 156 #endif
 157 #ifndef unlikely
 158 #define unlikely(x) __builtin_expect(!!(x), 0)
 159 #endif
 160 #else
 161 #ifndef likely
 162 #define likely(x) (x)
 163 #endif
 164 #ifndef unlikely
 165 #define unlikely(x) (x)
 166 #endif
 167 #endif
 168
 169 #define CHECK_DEBUGLVL( level ) \
 170   ( ((level) <= MAX_DEBUG_LEVEL) && \
 171     unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level)))
 172
 173 #define CHECK_DEBUGLVLC( dbgc_class, level ) \
 174   ( ((level) <= MAX_DEBUG_LEVEL) && \
 175     unlikely(DEBUGLEVEL_CLASS[ dbgc_class ] >= (level)))
 176
 177 #define DEBUGLVL( level ) \
 178   ( CHECK_DEBUGLVL(level) \
 179    && dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ ) )
 180
 181 #define DEBUGLVLC( dbgc_class, level ) \
 182   ( CHECK_DEBUGLVLC( dbgc_class, level ) \
 183    && dbghdrclass( level, dbgc_class, __location__, __FUNCTION__ ) )
 184
 185 #define DEBUG( level, body ) \
 186   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 187           unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))           \
 188        && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
 189        && (dbgtext body) )
 190
 191 #define DEBUGC( dbgc_class, level, body ) \
 192   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 193           unlikely(DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))           \
 194        && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
 195        && (dbgtext body) )
 196
 197 #define DEBUGADD( level, body ) \
 198   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 199           unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))   \
 200        && (dbgtext body) )
 201
 202 #define DEBUGADDC( dbgc_class, level, body ) \
 203   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 204           unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))) \
 205        && (dbgtext body) )
 206
 207 /* Print a separator to the debug log. */
 208 #define DEBUGSEP(level)\
 209         DEBUG((level),("===============================================================\n"))
 210
 211 /* Prefix messages with the function name */
 212 #define DBG_PREFIX(level, body ) \
 213         (void)( ((level) <= MAX_DEBUG_LEVEL) &&                 \
 214                 unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))     \
 215                 && (dbghdrclass(level, DBGC_CLASS, __location__, __func__ )) \
 216                 && (dbgtext("%s: ", __func__))                          \
 217                 && (dbgtext body) )
 218
 219 /*
 220  * Debug levels matching RFC 3164
 221  */
 222 #define DBGLVL_ERR       0      /* error conditions */
 223 #define DBGLVL_WARNING   1      /* warning conditions */
 224 #define DBGLVL_NOTICE    3      /* normal, but significant, condition */
 225 #define DBGLVL_INFO      5      /* informational message */
 226 #define DBGLVL_DEBUG    10      /* debug-level message */
 227
 228 #define DBG_ERR(...)            DBG_PREFIX(DBGLVL_ERR,          (__VA_ARGS__))
 229 #define DBG_WARNING(...)        DBG_PREFIX(DBGLVL_WARNING,      (__VA_ARGS__))
 230 #define DBG_NOTICE(...)         DBG_PREFIX(DBGLVL_NOTICE,       (__VA_ARGS__))
 231 #define DBG_INFO(...)           DBG_PREFIX(DBGLVL_INFO,         (__VA_ARGS__))
 232 #define DBG_DEBUG(...)          DBG_PREFIX(DBGLVL_DEBUG,        (__VA_ARGS__))
 233
 234 #define D_ERR(...)              DEBUG(DBGLVL_ERR,       (__VA_ARGS__))
 235 #define D_WARNING(...)          DEBUG(DBGLVL_WARNING,   (__VA_ARGS__))
 236 #define D_NOTICE(...)           DEBUG(DBGLVL_NOTICE,    (__VA_ARGS__))
 237 #define D_INFO(...)             DEBUG(DBGLVL_INFO,      (__VA_ARGS__))
 238 #define D_DEBUG(...)            DEBUG(DBGLVL_DEBUG,     (__VA_ARGS__))
 239
 240 /* The following definitions come from lib/debug.c  */
 241
 242 /** Possible destinations for the debug log (in order of precedence -
 243  * once set to DEBUG_FILE, it is not possible to reset to DEBUG_STDOUT
 244  * for example.  This makes it easy to override for debug to stderr on
 245  * the command line, as the smb.conf cannot reset it back to
 246  * file-based logging */
 247 enum debug_logtype {
 248         DEBUG_DEFAULT_STDERR = 0,
 249         DEBUG_DEFAULT_STDOUT = 1,
 250         DEBUG_FILE = 2,
 251         DEBUG_STDOUT = 3,
 252         DEBUG_STDERR = 4,
 253         DEBUG_CALLBACK = 5
 254 };
 255
 256 struct debug_settings {
 257         size_t max_log_size;
 258         bool timestamp_logs;
 259         bool debug_prefix_timestamp;
 260         bool debug_hires_timestamp;
 261         bool debug_pid;
 262         bool debug_uid;
 263         bool debug_class;
 264 };
 265
 266 void setup_logging(const char *prog_name, enum debug_logtype new_logtype);
 267
 268 void gfree_debugsyms(void);
 269 int debug_add_class(const char *classname);
 270 bool debug_parse_levels(const char *params_str);
 271 void debug_setup_talloc_log(void);
 272 void debug_set_logfile(const char *name);
 273 void debug_set_settings(struct debug_settings *settings,
 274                         const char *logging_param,
 275                         int syslog_level, bool syslog_only);
 276 bool reopen_logs_internal( void );
 277 void force_check_log_size( void );
 278 bool need_to_check_log_size( void );
 279 void check_log_size( void );
 280 void dbgflush( void );
 281 bool dbghdrclass(int level, int cls, const char *location, const char *func);
 282 bool debug_get_output_is_stderr(void);
 283 bool debug_get_output_is_stdout(void);
 284 void debug_schedule_reopen_logs(void);
 285 char *debug_list_class_names_and_levels(void);
 286
 287 typedef void (*debug_callback_fn)(void *private_ptr, int level, const char *msg);
 288
 289 /**
 290    Set a callback for all debug messages.  Use in dlz_bind9 to push output to the bind logs
 291  */
 292 void debug_set_callback(void *private_ptr, debug_callback_fn fn);
 293
 294 char *debug_get_ringbuf(void);
 295 size_t debug_get_ringbuf_size(void);
 296
 297 #endif /* _SAMBA_DEBUG_H */