lnet/libcfs/debug.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002 Cluster File Systems, Inc.
   5  *   Author: Phil Schwan <phil@clusterfs.com>
   6  *
   7  *   This file is part of Lustre, http://www.lustre.org.
   8  *
   9  *   Lustre is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Lustre is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Lustre; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #ifndef EXPORT_SYMTAB
  24 # define EXPORT_SYMTAB
  25 #endif
  26
  27 # define DEBUG_SUBSYSTEM S_LNET
  28
  29 #include <stdarg.h>
  30 #include <libcfs/kp30.h>
  31 #include <libcfs/libcfs.h>
  32 #include "tracefile.h"
  33
  34 static char debug_file_name[1024];
  35
  36 #ifdef __KERNEL__
  37 unsigned int libcfs_subsystem_debug = ~0;
  38 EXPORT_SYMBOL(libcfs_subsystem_debug);
  39
  40 unsigned int libcfs_debug = (D_EMERG | D_ERROR | D_WARNING | D_CONSOLE |
  41                              D_NETERROR | D_HA | D_CONFIG | D_IOCTL);
  42 EXPORT_SYMBOL(libcfs_debug);
  43
  44 unsigned int libcfs_printk = D_CANTMASK;
  45 EXPORT_SYMBOL(libcfs_printk);
  46
  47 unsigned int libcfs_console_ratelimit = 0;
  48 EXPORT_SYMBOL(libcfs_console_ratelimit);
  49
  50 cfs_duration_t libcfs_console_max_delay;
  51 EXPORT_SYMBOL(libcfs_console_max_delay);
  52
  53 cfs_duration_t libcfs_console_min_delay;
  54 EXPORT_SYMBOL(libcfs_console_min_delay);
  55
  56 unsigned int libcfs_console_backoff = CDEBUG_DEFAULT_BACKOFF;
  57 EXPORT_SYMBOL(libcfs_console_backoff);
  58
  59 unsigned int libcfs_debug_binary = 1;
  60 EXPORT_SYMBOL(libcfs_debug_binary);
  61
  62 unsigned int libcfs_stack;
  63 EXPORT_SYMBOL(libcfs_stack);
  64
  65 unsigned int portal_enter_debugger;
  66 EXPORT_SYMBOL(portal_enter_debugger);
  67
  68 unsigned int libcfs_catastrophe;
  69 EXPORT_SYMBOL(libcfs_catastrophe);
  70
  71 unsigned int libcfs_panic_on_lbug = 0;
  72 EXPORT_SYMBOL(libcfs_panic_on_lbug);
  73
  74 atomic_t libcfs_kmemory = ATOMIC_INIT(0);
  75 EXPORT_SYMBOL(libcfs_kmemory);
  76
  77 static cfs_waitq_t debug_ctlwq;
  78
  79 #ifdef __arch_um__
  80 char debug_file_path[1024] = "/r/tmp/lustre-log";
  81 #else
  82 char debug_file_path[1024] = "/tmp/lustre-log";
  83 #endif
  84
  85 int libcfs_panic_in_progress;
  86
  87 /* libcfs_debug_token2mask() expects the returned
  88  * string in lower-case */
  89 const char *
  90 libcfs_debug_subsys2str(int subsys)
  91 {
  92         switch (subsys) {
  93         default:
  94                 return NULL;
  95         case S_UNDEFINED:
  96                 return "undefined";
  97         case S_MDC:
  98                 return "mdc";
  99         case S_MDS:
 100                 return "mds";
 101         case S_OSC:
 102                 return "osc";
 103         case S_OST:
 104                 return "ost";
 105         case S_CLASS:
 106                 return "class";
 107         case S_LOG:
 108                 return "log";
 109         case S_LLITE:
 110                 return "llite";
 111         case S_RPC:
 112                 return "rpc";
 113         case S_LNET:
 114                 return "lnet";
 115         case S_LND:
 116                 return "lnd";
 117         case S_PINGER:
 118                 return "pinger";
 119         case S_FILTER:
 120                 return "filter";
 121         case S_ECHO:
 122                 return "echo";
 123         case S_LDLM:
 124                 return "ldlm";
 125         case S_LOV:
 126                 return "lov";
 127         case S_LMV:
 128                 return "lmv";
 129         case S_SEC:
 130                 return "sec";
 131         case S_GSS:
 132                 return "gss";
 133         case S_MGC:
 134                 return "mgc";
 135         case S_MGS:
 136                 return "mgs";
 137         case S_FID:
 138                 return "fid";
 139         case S_FLD:
 140                 return "fld";
 141         }
 142 }
 143
 144 /* libcfs_debug_token2mask() expects the returned
 145  * string in lower-case */
 146 const char *
 147 libcfs_debug_dbg2str(int debug)
 148 {
 149         switch (debug) {
 150         default:
 151                 return NULL;
 152         case D_TRACE:
 153                 return "trace";
 154         case D_INODE:
 155                 return "inode";
 156         case D_SUPER:
 157                 return "super";
 158         case D_EXT2:
 159                 return "ext2";
 160         case D_MALLOC:
 161                 return "malloc";
 162         case D_CACHE:
 163                 return "cache";
 164         case D_INFO:
 165                 return "info";
 166         case D_IOCTL:
 167                 return "ioctl";
 168         case D_NETERROR:
 169                 return "neterror";
 170         case D_NET:
 171                 return "net";
 172         case D_WARNING:
 173                 return "warning";
 174         case D_BUFFS:
 175                 return "buffs";
 176         case D_OTHER:
 177                 return "other";
 178         case D_DENTRY:
 179                 return "dentry";
 180         case D_NETTRACE:
 181                 return "nettrace";
 182         case D_PAGE:
 183                 return "page";
 184         case D_DLMTRACE:
 185                 return "dlmtrace";
 186         case D_ERROR:
 187                 return "error";
 188         case D_EMERG:
 189                 return "emerg";
 190         case D_HA:
 191                 return "ha";
 192         case D_RPCTRACE:
 193                 return "rpctrace";
 194         case D_VFSTRACE:
 195                 return "vfstrace";
 196         case D_READA:
 197                 return "reada";
 198         case D_MMAP:
 199                 return "mmap";
 200         case D_CONFIG:
 201                 return "config";
 202         case D_CONSOLE:
 203                 return "console";
 204         case D_QUOTA:
 205                 return "quota";
 206         case D_SEC:
 207                 return "sec";
 208         }
 209 }
 210
 211 int
 212 libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys)
 213 {
 214         const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
 215                                                  libcfs_debug_dbg2str;
 216         int           len = 0;
 217         const char   *token;
 218         int           bit;
 219         int           i;
 220
 221         if (mask == 0) {                        /* "0" */
 222                 if (size > 0)
 223                         str[0] = '0';
 224                 len = 1;
 225         } else {                                /* space-separated tokens */
 226                 for (i = 0; i < 32; i++) {
 227                         bit = 1 << i;
 228
 229                         if ((mask & bit) == 0)
 230                                 continue;
 231
 232                         token = fn(bit);
 233                         if (token == NULL)              /* unused bit */
 234                                 continue;
 235
 236                         if (len > 0) {                  /* separator? */
 237                                 if (len < size)
 238                                         str[len] = ' ';
 239                                 len++;
 240                         }
 241
 242                         while (*token != 0) {
 243                                 if (len < size)
 244                                         str[len] = *token;
 245                                 token++;
 246                                 len++;
 247                         }
 248                 }
 249         }
 250
 251         /* terminate 'str' */
 252         if (len < size)
 253                 str[len] = 0;
 254         else
 255                 str[size - 1] = 0;
 256
 257         return len;
 258 }
 259
 260 int
 261 libcfs_debug_token2mask(int *mask, const char *str, int len, int is_subsys)
 262 {
 263         const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
 264                                                  libcfs_debug_dbg2str;
 265         int           i;
 266         int           j;
 267         int           bit;
 268         const char   *token;
 269
 270         /* match against known tokens */
 271         for (i = 0; i < 32; i++) {
 272                 bit = 1 << i;
 273
 274                 token = fn(bit);
 275                 if (token == NULL)              /* unused? */
 276                         continue;
 277
 278                 /* strcasecmp */
 279                 for (j = 0; ; j++) {
 280                         if (j == len) {         /* end of token */
 281                                 if (token[j] == 0) {
 282                                         *mask = bit;
 283                                         return 0;
 284                                 }
 285                                 break;
 286                         }
 287
 288                         if (token[j] == 0)
 289                                 break;
 290
 291                         if (str[j] == token[j])
 292                                 continue;
 293
 294                         if (str[j] < 'A' || 'Z' < str[j])
 295                                 break;
 296
 297                         if (str[j] - 'A' + 'a' != token[j])
 298                                 break;
 299                 }
 300         }
 301
 302         return -EINVAL;                         /* no match */
 303 }
 304
 305 int
 306 libcfs_debug_str2mask(int *mask, const char *str, int is_subsys)
 307 {
 308         int         m = 0;
 309         char        op = 0;
 310         int         matched;
 311         int         n;
 312         int         t;
 313
 314         /* Allow a number for backwards compatibility */
 315
 316         for (n = strlen(str); n > 0; n--)
 317                 if (!isspace(str[n-1]))
 318                         break;
 319         matched = n;
 320
 321         if ((t = sscanf(str, "%i%n", &m, &matched)) >= 1 &&
 322             matched == n) {
 323                 *mask = m;
 324                 return 0;
 325         }
 326
 327         /* <str> must be a list of debug tokens or numbers separated by
 328          * whitespace and optionally an operator ('+' or '-').  If an operator
 329          * appears first in <str>, '*mask' is used as the starting point
 330          * (relative), otherwise 0 is used (absolute).  An operator applies to
 331          * all following tokens up to the next operator. */
 332
 333         matched = 0;
 334         while (*str != 0) {
 335                 while (isspace(*str)) /* skip whitespace */
 336                         str++;
 337
 338                 if (*str == 0)
 339                         break;
 340
 341                 if (*str == '+' || *str == '-') {
 342                         op = *str++;
 343
 344                         /* op on first token == relative */
 345                         if (!matched)
 346                                 m = *mask;
 347
 348                         while (isspace(*str)) /* skip whitespace */
 349                                 str++;
 350
 351                         if (*str == 0)          /* trailing op */
 352                                 return -EINVAL;
 353                 }
 354
 355                 /* find token length */
 356                 for (n = 0; str[n] != 0 && !isspace(str[n]); n++);
 357
 358                 /* match token */
 359                 if (libcfs_debug_token2mask(&t, str, n, is_subsys) != 0)
 360                         return -EINVAL;
 361
 362                 matched = 1;
 363                 if (op == '-')
 364                         m &= ~t;
 365                 else
 366                         m |= t;
 367
 368                 str += n;
 369         }
 370
 371         if (!matched)
 372                 return -EINVAL;
 373
 374         *mask = m;
 375         return 0;
 376 }
 377
 378 void libcfs_debug_dumplog_internal(void *arg)
 379 {
 380         CFS_DECL_JOURNAL_DATA;
 381
 382         CFS_PUSH_JOURNAL;
 383
 384         snprintf(debug_file_name, sizeof(debug_file_path) - 1, "%s.%ld.%ld",
 385                  debug_file_path, cfs_time_current_sec(), (long)arg);
 386         printk(KERN_ALERT "LustreError: dumping log to %s\n", debug_file_name);
 387         tracefile_dump_all_pages(debug_file_name);
 388
 389         CFS_POP_JOURNAL;
 390 }
 391
 392 int libcfs_debug_dumplog_thread(void *arg)
 393 {
 394         cfs_daemonize("");
 395         libcfs_debug_dumplog_internal(arg);
 396         cfs_waitq_signal(&debug_ctlwq);
 397         return 0;
 398 }
 399
 400 void libcfs_debug_dumplog(void)
 401 {
 402         int            rc;
 403         cfs_waitlink_t wait;
 404         ENTRY;
 405
 406         /* we're being careful to ensure that the kernel thread is
 407          * able to set our state to running as it exits before we
 408          * get to schedule() */
 409         cfs_waitlink_init(&wait);
 410         set_current_state(TASK_INTERRUPTIBLE);
 411         cfs_waitq_add(&debug_ctlwq, &wait);
 412
 413         rc = cfs_kernel_thread(libcfs_debug_dumplog_thread,
 414                                (void *)(long)cfs_curproc_pid(),
 415                                CLONE_VM | CLONE_FS | CLONE_FILES);
 416         if (rc < 0)
 417                 printk(KERN_ERR "LustreError: cannot start log dump thread: "
 418                        "%d\n", rc);
 419         else
 420                 cfs_waitq_wait(&wait, CFS_TASK_INTERRUPTIBLE);
 421
 422         /* be sure to teardown if kernel_thread() failed */
 423         cfs_waitq_del(&debug_ctlwq, &wait);
 424         set_current_state(TASK_RUNNING);
 425 }
 426
 427 int libcfs_debug_init(unsigned long bufsize)
 428 {
 429         int    rc;
 430
 431         cfs_waitq_init(&debug_ctlwq);
 432         libcfs_console_max_delay = CDEBUG_DEFAULT_MAX_DELAY;
 433         libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
 434         rc = tracefile_init();
 435
 436         if (rc == 0)
 437                 libcfs_register_panic_notifier();
 438
 439         return rc;
 440 }
 441
 442 int libcfs_debug_cleanup(void)
 443 {
 444         libcfs_unregister_panic_notifier();
 445         tracefile_exit();
 446         return 0;
 447 }
 448
 449 int libcfs_debug_clear_buffer(void)
 450 {
 451         trace_flush_pages();
 452         return 0;
 453 }
 454
 455 /* Debug markers, although printed by S_LNET
 456  * should not be be marked as such. */
 457 #undef DEBUG_SUBSYSTEM
 458 #define DEBUG_SUBSYSTEM S_UNDEFINED
 459 int libcfs_debug_mark_buffer(char *text)
 460 {
 461         CDEBUG(D_TRACE,"***************************************************\n");
 462         CDEBUG(D_WARNING, "DEBUG MARKER: %s\n", text);
 463         CDEBUG(D_TRACE,"***************************************************\n");
 464
 465         return 0;
 466 }
 467 #undef DEBUG_SUBSYSTEM
 468 #define DEBUG_SUBSYSTEM S_LNET
 469
 470 void libcfs_debug_set_level(unsigned int debug_level)
 471 {
 472         printk(KERN_WARNING "Lustre: Setting portals debug level to %08x\n",
 473                debug_level);
 474         libcfs_debug = debug_level;
 475 }
 476
 477 EXPORT_SYMBOL(libcfs_debug_dumplog);
 478 EXPORT_SYMBOL(libcfs_debug_set_level);
 479
 480
 481 #else /* !__KERNEL__ */
 482
 483 #include <libcfs/libcfs.h>
 484
 485 #ifdef HAVE_CATAMOUNT_DATA_H
 486 #include <catamount/data.h>
 487 #include <catamount/lputs.h>
 488
 489 static char source_nid[16];
 490 /* 0 indicates no messages to console, 1 is errors, > 1 is all debug messages */
 491 static int toconsole = 1;
 492 unsigned int libcfs_console_ratelimit = 1;
 493 cfs_duration_t libcfs_console_max_delay;
 494 cfs_duration_t libcfs_console_min_delay;
 495 unsigned int libcfs_console_backoff = CDEBUG_DEFAULT_BACKOFF;
 496 #else /* !HAVE_CATAMOUNT_DATA_H */
 497 #ifdef HAVE_NETDB_H
 498 #include <sys/utsname.h>
 499 #endif /* HAVE_NETDB_H */
 500 struct utsname *tmp_utsname;
 501 static char source_nid[sizeof(tmp_utsname->nodename)];
 502 #endif /* HAVE_CATAMOUNT_DATA_H */
 503
 504 static int source_pid;
 505 int smp_processor_id = 1;
 506 char debug_file_path[1024];
 507 FILE *debug_file_fd;
 508
 509 int portals_do_debug_dumplog(void *arg)
 510 {
 511         printf("Look in %s\n", debug_file_name);
 512         return 0;
 513 }
 514
 515
 516 void portals_debug_print(void)
 517 {
 518         return;
 519 }
 520
 521
 522 void libcfs_debug_dumplog(void)
 523 {
 524         printf("Look in %s\n", debug_file_name);
 525         return;
 526 }
 527
 528 int libcfs_debug_init(unsigned long bufsize)
 529 {
 530         char *debug_mask = NULL;
 531         char *debug_subsys = NULL;
 532         char *debug_filename;
 533
 534 #ifdef HAVE_CATAMOUNT_DATA_H
 535         char *debug_console = NULL;
 536         char *debug_ratelimit = NULL;
 537         char *debug_max_delay = NULL;
 538         char *debug_min_delay = NULL;
 539         char *debug_backoff = NULL;
 540
 541         libcfs_console_max_delay = CDEBUG_DEFAULT_MAX_DELAY;
 542         libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
 543
 544         snprintf(source_nid, sizeof(source_nid) - 1, "%u", _my_pnid);
 545         source_pid = _my_pid;
 546
 547         debug_console = getenv("LIBLUSTRE_DEBUG_CONSOLE");
 548         if (debug_console != NULL) {
 549                 toconsole = strtoul(debug_console, NULL, 0);
 550                 CDEBUG(D_INFO, "set liblustre toconsole to %u\n", toconsole);
 551         }
 552         debug_ratelimit = getenv("LIBLUSTRE_DEBUG_CONSOLE_RATELIMIT");
 553         if (debug_ratelimit != NULL) {
 554                 libcfs_console_ratelimit = strtoul(debug_ratelimit, NULL, 0);
 555                 CDEBUG(D_INFO, "set liblustre console ratelimit to %u\n",
 556                                 libcfs_console_ratelimit);
 557         }
 558         debug_max_delay = getenv("LIBLUSTRE_DEBUG_CONSOLE_MAX_DELAY");
 559         if (debug_max_delay != NULL)
 560                 libcfs_console_max_delay =
 561                             cfs_time_seconds(strtoul(debug_max_delay, NULL, 0));
 562         debug_min_delay = getenv("LIBLUSTRE_DEBUG_CONSOLE_MIN_DELAY");
 563         if (debug_min_delay != NULL)
 564                 libcfs_console_min_delay =
 565                             cfs_time_seconds(strtoul(debug_min_delay, NULL, 0));
 566         if (debug_min_delay || debug_max_delay) {
 567                 if (!libcfs_console_max_delay || !libcfs_console_min_delay ||
 568                     libcfs_console_max_delay < libcfs_console_min_delay) {
 569                         libcfs_console_max_delay = CDEBUG_DEFAULT_MAX_DELAY;
 570                         libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
 571                         CDEBUG(D_INFO, "LIBLUSTRE_DEBUG_CONSOLE_MAX_DELAY "
 572                                        "should be greater than "
 573                                        "LIBLUSTRE_DEBUG_CONSOLE_MIN_DELAY "
 574                                        "and both parameters should be non-null"
 575                                        ": restore default values\n");
 576                 } else {
 577                         CDEBUG(D_INFO, "set liblustre console max delay to %lus"
 578                                        " and min delay to %lus\n",
 579                                (cfs_duration_t)
 580                                      cfs_duration_sec(libcfs_console_max_delay),
 581                                (cfs_duration_t)
 582                                     cfs_duration_sec(libcfs_console_min_delay));
 583                 }
 584         }
 585         debug_backoff = getenv("LIBLUSTRE_DEBUG_CONSOLE_BACKOFF");
 586         if (debug_backoff != NULL) {
 587                 libcfs_console_backoff = strtoul(debug_backoff, NULL, 0);
 588                 if (libcfs_console_backoff <= 0) {
 589                         libcfs_console_backoff = CDEBUG_DEFAULT_BACKOFF;
 590                         CDEBUG(D_INFO, "LIBLUSTRE_DEBUG_CONSOLE_BACKOFF <= 0: "
 591                                        "restore default value\n");
 592                 } else {
 593                         CDEBUG(D_INFO, "set liblustre console backoff to %u\n",
 594                                libcfs_console_backoff);
 595                 }
 596         }
 597 #else
 598         struct utsname myname;
 599
 600         if (uname(&myname) == 0)
 601                 strcpy(source_nid, myname.nodename);
 602         source_pid = getpid();
 603 #endif
 604         /* debug masks */
 605         debug_mask = getenv("LIBLUSTRE_DEBUG_MASK");
 606         if (debug_mask)
 607                 libcfs_debug = (unsigned int) strtol(debug_mask, NULL, 0);
 608
 609         debug_subsys = getenv("LIBLUSTRE_DEBUG_SUBSYS");
 610         if (debug_subsys)
 611                 libcfs_subsystem_debug =
 612                                 (unsigned int) strtol(debug_subsys, NULL, 0);
 613
 614         debug_filename = getenv("LIBLUSTRE_DEBUG_BASE");
 615         if (debug_filename)
 616                 strncpy(debug_file_path,debug_filename,sizeof(debug_file_path));
 617
 618         debug_filename = getenv("LIBLUSTRE_DEBUG_FILE");
 619         if (debug_filename)
 620                 strncpy(debug_file_name,debug_filename,sizeof(debug_file_path));
 621
 622         if (debug_file_name[0] == '\0' && debug_file_path[0] != '\0')
 623                 snprintf(debug_file_name, sizeof(debug_file_name) - 1,
 624                          "%s-%s-%lu.log", debug_file_path, source_nid, time(0));
 625
 626         if (strcmp(debug_file_name, "stdout") == 0 ||
 627             strcmp(debug_file_name, "-") == 0) {
 628                 debug_file_fd = stdout;
 629         } else if (strcmp(debug_file_name, "stderr") == 0) {
 630                 debug_file_fd = stderr;
 631         } else if (debug_file_name[0] != '\0') {
 632                 debug_file_fd = fopen(debug_file_name, "w");
 633                 if (debug_file_fd == NULL)
 634                         fprintf(stderr, "%s: unable to open '%s': %s\n",
 635                                 source_nid, debug_file_name, strerror(errno));
 636         }
 637
 638         if (debug_file_fd == NULL)
 639                 debug_file_fd = stdout;
 640
 641         return 0;
 642 }
 643
 644 int libcfs_debug_cleanup(void)
 645 {
 646         if (debug_file_fd != stdout && debug_file_fd != stderr)
 647                 fclose(debug_file_fd);
 648         return 0;
 649 }
 650
 651 int libcfs_debug_clear_buffer(void)
 652 {
 653         return 0;
 654 }
 655
 656 int libcfs_debug_mark_buffer(char *text)
 657 {
 658
 659         fprintf(debug_file_fd, "*******************************************************************************\n");
 660         fprintf(debug_file_fd, "DEBUG MARKER: %s\n", text);
 661         fprintf(debug_file_fd, "*******************************************************************************\n");
 662
 663         return 0;
 664 }
 665
 666 #ifdef HAVE_CATAMOUNT_DATA_H
 667 #define CATAMOUNT_MAXLINE (256-4)
 668 void catamount_printline(char *buf, size_t size)
 669 {
 670     char *pos = buf;
 671     int prsize = size;
 672
 673     while (prsize > 0){
 674         lputs(pos);
 675         pos += CATAMOUNT_MAXLINE;
 676         prsize -= CATAMOUNT_MAXLINE;
 677     }
 678 }
 679 #endif
 680
 681 int
 682 libcfs_debug_vmsg2(cfs_debug_limit_state_t *cdls,
 683                    int subsys, int mask,
 684                    const char *file, const char *fn, const int line,
 685                    const char *format1, va_list args,
 686                    const char *format2, ...)
 687 {
 688         struct timeval tv;
 689         int            nob;
 690         int            remain;
 691         va_list        ap;
 692         char           buf[PAGE_SIZE]; /* size 4096 used for compatimble with linux,
 693                                         * where message can`t be exceed PAGE_SIZE */
 694         int            console = 0;
 695         char *prefix = "Lustre";
 696
 697 #ifdef HAVE_CATAMOUNT_DATA_H
 698         /* toconsole == 0 - all messages to debug_file_fd
 699          * toconsole == 1 - warnings to console, all to debug_file_fd
 700          * toconsole >  1 - all debug to console */
 701         if (((mask & libcfs_printk) && toconsole == 1) || toconsole > 1)
 702                 console = 1;
 703 #endif
 704
 705         if ((!console) && (!debug_file_fd)) {
 706                 return 0;
 707         }
 708
 709         if (mask & (D_EMERG | D_ERROR))
 710                prefix = "LustreError";
 711
 712         nob = snprintf(buf, sizeof(buf), "%s: %u-%s:(%s:%d:%s()): ", prefix,
 713                        source_pid, source_nid, file, line, fn);
 714
 715         remain = sizeof(buf) - nob;
 716         if (format1) {
 717                 nob += vsnprintf(&buf[nob], remain, format1, args);
 718         }
 719
 720         remain = sizeof(buf) - nob;
 721         if ((format2) && (remain > 0)) {
 722                 va_start(ap, format2);
 723                 nob += vsnprintf(&buf[nob], remain, format2, ap);
 724                 va_end(ap);
 725         }
 726
 727 #ifdef HAVE_CATAMOUNT_DATA_H
 728         if (console) {
 729                 /* check rate limit for console */
 730                 if (cdls != NULL) {
 731                         if (libcfs_console_ratelimit &&
 732                                 cdls->cdls_next != 0 &&     /* not first time ever */
 733                                 !cfs_time_after(cfs_time_current(), cdls->cdls_next)) {
 734
 735                                 /* skipping a console message */
 736                                 cdls->cdls_count++;
 737                                 goto out_file;
 738                         }
 739
 740                         if (cfs_time_after(cfs_time_current(), cdls->cdls_next +
 741                                            libcfs_console_max_delay +
 742                                            cfs_time_seconds(10))) {
 743                                 /* last timeout was a long time ago */
 744                                 cdls->cdls_delay /= libcfs_console_backoff * 4;
 745                         } else {
 746                                 cdls->cdls_delay *= libcfs_console_backoff;
 747
 748                                 if (cdls->cdls_delay <
 749                                                 libcfs_console_min_delay)
 750                                         cdls->cdls_delay =
 751                                                 libcfs_console_min_delay;
 752                                 else if (cdls->cdls_delay >
 753                                                 libcfs_console_max_delay)
 754                                         cdls->cdls_delay =
 755                                                 libcfs_console_max_delay;
 756                         }
 757
 758                         /* ensure cdls_next is never zero after it's been seen */
 759                         cdls->cdls_next = (cfs_time_current() + cdls->cdls_delay) | 1;
 760                 }
 761
 762                 if (cdls != NULL && cdls->cdls_count != 0) {
 763                         char buf2[100];
 764
 765                         nob = snprintf(buf2, sizeof(buf2),
 766                                        "Skipped %d previous similar message%s\n",
 767                                        cdls->cdls_count, (cdls->cdls_count > 1) ? "s" : "");
 768
 769                         catamount_printline(buf2, nob);
 770                         cdls->cdls_count = 0;
 771                         goto out_file;
 772                 }
 773                 catamount_printline(buf, nob);
 774        }
 775 out_file:
 776         /* return on toconsole > 1, as we don't want the user getting
 777         * spammed by the debug data */
 778         if (toconsole > 1)
 779                 return 0;
 780 #endif
 781         if (debug_file_fd == NULL)
 782                 return 0;
 783
 784         gettimeofday(&tv, NULL);
 785
 786         fprintf(debug_file_fd, "%lu.%06lu:%u:%s:(%s:%d:%s()): %s",
 787                 tv.tv_sec, tv.tv_usec, source_pid, source_nid,
 788                 file, line, fn, buf);
 789
 790         return 0;
 791 }
 792
 793 void
 794 libcfs_assertion_failed(const char *expr, const char *file, const char *func,
 795                         const int line)
 796 {
 797         libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line,
 798                          "ASSERTION(%s) failed\n", expr);
 799         abort();
 800 }
 801
 802 #endif /* __KERNEL__ */