ircd/s_debug.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/s_debug.c
   3  * Copyright (C) 1990 Jarkko Oikarinen and
   4  *                    University of Oulu, Computing Center
   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 as published by
   8  * the Free Software Foundation; either version 1, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 /** @file
  21  * @brief Debug support for the ircd.
  22  * @version $Id: s_debug.c,v 1.41 2005/06/19 02:31:27 entrope Exp $
  23  */
  24 #include "config.h"
  25
  26 #include "s_debug.h"
  27 #include "channel.h"
  28 #include "class.h"
  29 #include "client.h"
  30 #include "gline.h"
  31 #include "hash.h"
  32 #include "ircd_alloc.h"
  33 #include "ircd_features.h"
  34 #include "ircd_log.h"
  35 #include "ircd_osdep.h"
  36 #include "ircd_reply.h"
  37 #include "ircd.h"
  38 #include "jupe.h"
  39 #include "list.h"
  40 #include "listener.h"
  41 #include "motd.h"
  42 #include "msgq.h"
  43 #include "numeric.h"
  44 #include "numnicks.h"
  45 #include "res.h"
  46 #include "s_bsd.h"
  47 #include "s_conf.h"
  48 #include "s_user.h"
  49 #include "s_stats.h"
  50 #include "send.h"
  51 #include "struct.h"
  52 #include "sys.h"
  53 #include "whowas.h"
  54
  55 /* #include <assert.h> -- Now using assert in ircd_log.h */
  56 #include <errno.h>
  57 #include <fcntl.h>
  58 #include <stdarg.h>
  59 #include <stddef.h>     /* offsetof */
  60 #include <stdio.h>
  61 #include <string.h>
  62 #include <unistd.h>
  63
  64 /*
  65  * Option string.  Must be before #ifdef DEBUGMODE.
  66  */
  67 static char serveropts[256]; /* should be large enough for anything */
  68
  69 /** Return a string describing important configuration information.
  70  * @return Pointer to a static buffer.
  71  */
  72 const char* debug_serveropts(void)
  73 {
  74   int bp;
  75   int i = 0;
  76 #define AddC(c) serveropts[i++] = (c)
  77
  78   bp = feature_int(FEAT_BUFFERPOOL);
  79   if (bp < 1000000) {
  80     AddC('b');
  81     if (bp > 99999)
  82       AddC((char)('0' + (bp / 100000)));
  83     if (bp > 9999)
  84       AddC((char)('0' + (bp / 10000) % 10));
  85     AddC((char)('0' + (bp / 1000) % 10));
  86   } else {
  87     AddC('B');
  88     if (bp > 99999999)
  89       AddC((char)('0' + (bp / 100000000)));
  90     if (bp > 9999999)
  91       AddC((char)('0' + (bp / 10000000) % 10));
  92     AddC((char)('0' + (bp / 1000000) % 10));
  93   }
  94
  95 #ifndef NDEBUG
  96   AddC('A');
  97 #endif
  98 #ifdef  DEBUGMODE
  99   AddC('D');
 100 #endif
 101
 102   if (feature_bool(FEAT_HUB))
 103     AddC('H');
 104
 105   if (feature_bool(FEAT_IDLE_FROM_MSG))
 106     AddC('M');
 107
 108   if (feature_bool(FEAT_RELIABLE_CLOCK))
 109     AddC('R');
 110
 111 #if defined(USE_POLL) && defined(HAVE_POLL_H)
 112   AddC('U');
 113 #endif
 114 #ifdef  IPV6
 115   AddC('6');
 116 #endif
 117
 118   serveropts[i] = '\0';
 119
 120   return serveropts;
 121 }
 122
 123 /** Initialize debugging.
 124  * If the -t option is not given on the command line when the server is
 125  * started, all debugging output is sent to the file set by LPATH in config.h
 126  * Here we just open that file and make sure it is opened to fd 2 so that
 127  * any fprintf's to stderr also go to the logfile.  If the debuglevel is not
 128  * set from the command line by -x, use /dev/null as the dummy logfile as long
 129  * as DEBUGMODE has been defined, else don't waste the fd.
 130  * @param use_tty Passed to log_debug_init().
 131  */
 132 void debug_init(int use_tty)
 133 {
 134 #ifdef  DEBUGMODE
 135   if (debuglevel >= 0) {
 136     printf("isatty = %d ttyname = %s\n", isatty(2), ttyname(2));
 137     log_debug_init(use_tty);
 138   }
 139 #endif
 140 }
 141
 142 #ifdef DEBUGMODE
 143 /** Log a debug message using a va_list.
 144  * If the current #debuglevel is less than \a level, do not display.
 145  * @param level Debug level for message.
 146  * @param form Format string, passed to log_vwrite().
 147  * @param vl Varargs argument list for format string.
 148  */
 149 void vdebug(int level, const char *form, va_list vl)
 150 {
 151   static int loop = 0;
 152   int err = errno;
 153
 154   if (!loop && (debuglevel >= 0) && (level <= debuglevel))
 155   {
 156     loop = 1;
 157     log_vwrite(LS_DEBUG, L_DEBUG, 0, form, vl);
 158     loop = 0;
 159   }
 160   errno = err;
 161 }
 162
 163 /** Log a debug message using a variable number of arguments.
 164  * This is a simple wrapper around debug(\a level, \a form, vl).
 165  * @param level Debug level for message.
 166  * @param form Format string of message.
 167  */
 168 void debug(int level, const char *form, ...)
 169 {
 170   va_list vl;
 171   va_start(vl, form);
 172   vdebug(level, form, vl);
 173   va_end(vl);
 174 }
 175
 176 /** Send a literal RPL_STATSDEBUG message to a user.
 177  * @param cptr Client to receive the message.
 178  * @param msg Text message to send to user.
 179  */
 180 static void debug_enumerator(struct Client* cptr, const char* msg)
 181 {
 182   assert(0 != cptr);
 183   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":%s", msg);
 184 }
 185
 186 /** Send resource usage statistics to a client.
 187  * @param cptr Client to send data to.
 188  * @param sd StatDesc that generated the stats request (ignored).
 189  * @param param Extra parameter from user (ignored).
 190  */
 191 void send_usage(struct Client *cptr, const struct StatDesc *sd,
 192                 char *param)
 193 {
 194   os_get_rusage(cptr, CurrentTime - cli_since(&me), debug_enumerator);
 195
 196   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":DBUF alloc %d used %d",
 197              DBufAllocCount, DBufUsedCount);
 198 }
 199 #endif /* DEBUGMODE */
 200
 201 /** Report memory usage statistics to a client.
 202  * @param cptr Client to send data to.
 203  * @param sd StatDesc that generated the stats request (ignored).
 204  * @param param Extra parameter from user (ignored).
 205  */
 206 void count_memory(struct Client *cptr, const struct StatDesc *sd,
 207                   char *param)
 208 {
 209   struct Client *acptr;
 210   struct SLink *link;
 211   struct Ban *ban;
 212   struct Channel *chptr;
 213   struct ConfItem *aconf;
 214   const struct ConnectionClass* cltmp;
 215   struct Membership* member;
 216
 217   int acc = 0,                  /* accounts */
 218       c = 0,                    /* clients */
 219       cn = 0,                   /* connections */
 220       ch = 0,                   /* channels */
 221       lcc = 0,                  /* local client conf links */
 222       chi = 0,                  /* channel invites */
 223       chb = 0,                  /* channel bans */
 224       wwu = 0,                  /* whowas users */
 225       cl = 0,                   /* classes */
 226       co = 0,                   /* conf lines */
 227       listeners = 0,            /* listeners */
 228       memberships = 0;          /* channel memberships */
 229
 230   int usi = 0,                  /* users invited */
 231       aw = 0,                   /* aways set */
 232       wwa = 0,                  /* whowas aways */
 233       gl = 0,                   /* glines */
 234       ju = 0;                   /* jupes */
 235
 236   size_t chm = 0,               /* memory used by channels */
 237       chbm = 0,                 /* memory used by channel bans */
 238       cm = 0,                   /* memory used by clients */
 239       cnm = 0,                  /* memory used by connections */
 240       us = 0,                   /* user structs */
 241       usm = 0,                  /* memory used by user structs */
 242       awm = 0,                  /* memory used by aways */
 243       wwam = 0,                 /* whowas away memory used */
 244       wwm = 0,                  /* whowas array memory used */
 245       glm = 0,                  /* memory used by glines */
 246       jum = 0,                  /* memory used by jupes */
 247       com = 0,                  /* memory used by conf lines */
 248       dbufs_allocated = 0,      /* memory used by dbufs */
 249       dbufs_used = 0,           /* memory used by dbufs */
 250       msg_allocated = 0,        /* memory used by struct Msg */
 251       msgbuf_allocated = 0,     /* memory used by struct MsgBuf */
 252       listenersm = 0,           /* memory used by listetners */
 253       rm = 0,                   /* res memory used */
 254       totcl = 0, totch = 0, totww = 0, tot = 0;
 255
 256   count_whowas_memory(&wwu, &wwm, &wwa, &wwam);
 257   wwm += sizeof(struct Whowas) * feature_int(FEAT_NICKNAMEHISTORYLENGTH);
 258   wwm += sizeof(struct Whowas *) * WW_MAX;
 259
 260   for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr))
 261   {
 262     c++;
 263     if (MyConnect(acptr))
 264     {
 265       cn++;
 266       for (link = cli_confs(acptr); link; link = link->next)
 267         lcc++;
 268     }
 269     if (cli_user(acptr))
 270     {
 271       for (link = cli_user(acptr)->invited; link; link = link->next)
 272         usi++;
 273       for (member = cli_user(acptr)->channel; member; member = member->next_channel)
 274         ++memberships;
 275       if (cli_user(acptr)->away)
 276       {
 277         aw++;
 278         awm += (strlen(cli_user(acptr)->away) + 1);
 279       }
 280     }
 281
 282     if (IsAccount(acptr))
 283       acc++;
 284   }
 285   cm = c * sizeof(struct Client);
 286   cnm = cn * sizeof(struct Connection);
 287   user_count_memory(&us, &usm);
 288
 289   for (chptr = GlobalChannelList; chptr; chptr = chptr->next)
 290   {
 291     ch++;
 292     chm += (strlen(chptr->chname) + sizeof(struct Channel));
 293     for (link = chptr->invites; link; link = link->next)
 294       chi++;
 295     for (ban = chptr->banlist; ban; ban = ban->next)
 296     {
 297       chb++;
 298       chbm += strlen(ban->who) + strlen(ban->banstr) + 2 + sizeof(*ban);
 299     }
 300   }
 301
 302   for (aconf = GlobalConfList; aconf; aconf = aconf->next)
 303   {
 304     co++;
 305     com += aconf->host ? strlen(aconf->host) + 1 : 0;
 306     com += aconf->passwd ? strlen(aconf->passwd) + 1 : 0;
 307     com += aconf->name ? strlen(aconf->name) + 1 : 0;
 308     com += sizeof(struct ConfItem);
 309   }
 310
 311   for (cltmp = get_class_list(); cltmp; cltmp = cltmp->next)
 312     cl++;
 313
 314   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 315              ":Clients %d(%zu) Connections %d(%zu)", c, cm, cn, cnm);
 316   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 317              ":Users %zu(%zu) Accounts %d(%zu) Invites %d(%zu)",
 318              us, usm, acc, acc * (ACCOUNTLEN + 1),
 319              usi, usi * sizeof(struct SLink));
 320   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 321              ":User channels %d(%zu) Aways %d(%zu)", memberships,
 322              memberships * sizeof(struct Membership), aw, awm);
 323
 324   totcl = cm + cnm + us * sizeof(struct User) + memberships * sizeof(struct Membership) + awm;
 325   totcl += lcc * sizeof(struct SLink) + usi * sizeof(struct SLink);
 326
 327   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Conflines %d(%zu) Attached %d(%zu) Classes %d(%zu)",
 328              co, com, lcc, lcc * sizeof(struct SLink),
 329              cl, cl * sizeof(struct ConnectionClass));
 330
 331   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 332              ":Channels %d(%zu) Bans %d(%zu)", ch, chm, chb, chbm);
 333   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 334              ":Channel Members %d(%zu) Invites %d(%zu)", memberships,
 335              memberships * sizeof(struct Membership), chi,
 336              chi * sizeof(struct SLink));
 337
 338   totch = chm + chbm + chi * sizeof(struct SLink);
 339
 340   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 341              ":Whowas Users %d(%zu) Away %d(%zu) Array %d(%zu)",
 342              wwu, wwu * sizeof(struct User), wwa, wwam,
 343              feature_int(FEAT_NICKNAMEHISTORYLENGTH), wwm);
 344
 345   totww = wwu * sizeof(struct User) + wwam + wwm;
 346
 347   motd_memory_count(cptr);
 348
 349   gl = gline_memory_count(&glm);
 350   ju = jupe_memory_count(&jum);
 351   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 352              ":Glines %d(%zu) Jupes %d(%zu)", gl, glm, ju, jum);
 353
 354   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 355              ":Hash: client %d(%zu), chan is the same", HASHSIZE,
 356              sizeof(void *) * HASHSIZE);
 357
 358   count_listener_memory(&listeners, &listenersm);
 359   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 360              ":Listeners allocated %d(%zu)", listeners, listenersm);
 361   /*
 362    * NOTE: this count will be accurate only for the exact instant that this
 363    * message is being sent, so the count is affected by the dbufs that
 364    * are being used to send this message out. If this is not desired, move
 365    * the dbuf_count_memory call to a place before we start sending messages
 366    * and cache DBufAllocCount and DBufUsedCount in variables until they
 367    * are sent.
 368    */
 369   dbuf_count_memory(&dbufs_allocated, &dbufs_used);
 370   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 371              ":DBufs allocated %d(%zu) used %d(%zu)", DBufAllocCount,
 372              dbufs_allocated, DBufUsedCount, dbufs_used);
 373
 374   /* The DBuf caveats now count for this, but this routine now sends
 375    * replies all on its own.
 376    */
 377   msgq_count_memory(cptr, &msg_allocated, &msgbuf_allocated);
 378
 379   rm = cres_mem(cptr);
 380
 381   tot =
 382       totww + totch + totcl + com + cl * sizeof(struct ConnectionClass) +
 383       dbufs_allocated + msg_allocated + msgbuf_allocated + rm;
 384   tot += sizeof(void *) * HASHSIZE * 3;
 385
 386 #if defined(MDEBUG)
 387   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Allocations: %zu(%zu)",
 388              fda_get_block_count(), fda_get_byte_count());
 389 #endif
 390
 391   send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
 392              ":Total: ww %zu ch %zu cl %zu co %zu db %zu ms %zu mb %zu",
 393              totww, totch, totcl, com, dbufs_allocated, msg_allocated,
 394              msgbuf_allocated);
 395 }