lnet/utils/debug.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   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 version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lnet/utils/debug.c
  37  * Some day I'll split all of this functionality into a cfs_debug module
  38  * of its own. That day is not today.
  39  */
  40
  41 #define __USE_FILE_OFFSET64
  42 #ifndef _GNU_SOURCE
  43 #define  _GNU_SOURCE
  44 #endif
  45
  46 #include <libcfs/libcfsutil.h>
  47 #include <lnet/lnetctl.h>
  48
  49
  50 static char rawbuf[8192];
  51 static char *buf = rawbuf;
  52 static int max = 8192;
  53 /*static int g_pfd = -1;*/
  54 static int subsystem_mask = ~0;
  55 static int debug_mask = ~0;
  56
  57 #define MAX_MARK_SIZE 256
  58
  59 static const char *libcfs_debug_subsystems[] = LIBCFS_DEBUG_SUBSYS_NAMES;
  60 static const char *libcfs_debug_masks[] = LIBCFS_DEBUG_MASKS_NAMES;
  61
  62 #ifdef __linux__
  63
  64 #define DAEMON_CTL_NAME         "/proc/sys/lnet/daemon_file"
  65 #define SUBSYS_DEBUG_CTL_NAME   "/proc/sys/lnet/subsystem_debug"
  66 #define DEBUG_CTL_NAME          "/proc/sys/lnet/debug"
  67 #define DUMP_KERNEL_CTL_NAME    "/proc/sys/lnet/dump_kernel"
  68
  69 static int
  70 dbg_open_ctlhandle(const char *str)
  71 {
  72         int fd;
  73         fd = open(str, O_WRONLY);
  74         if (fd < 0) {
  75                 fprintf(stderr, "open %s failed: %s\n", str,
  76                         strerror(errno));
  77                 return -1;
  78         }
  79         return fd;
  80 }
  81
  82 static void
  83 dbg_close_ctlhandle(int fd)
  84 {
  85         close(fd);
  86 }
  87
  88 static int
  89 dbg_write_cmd(int fd, char *str, int len)
  90 {
  91         int    rc  = write(fd, str, len);
  92
  93         return (rc == len ? 0 : 1);
  94 }
  95
  96 #elif defined(__DARWIN__)
  97
  98 #define DAEMON_CTL_NAME         "lnet.trace_daemon"
  99 #define SUBSYS_DEBUG_CTL_NAME   "lnet.subsystem_debug"
 100 #define DEBUG_CTL_NAME          "lnet.debug"
 101 #define DUMP_KERNEL_CTL_NAME    "lnet.trace_dumpkernel"
 102
 103 static char     sysctl_name[128];
 104 static int
 105 dbg_open_ctlhandle(const char *str)
 106 {
 107
 108         if (strlen(str)+1 > 128) {
 109                 fprintf(stderr, "sysctl name is too long: %s.\n", str);
 110                 return -1;
 111         }
 112         strcpy(sysctl_name, str);
 113
 114         return 0;
 115 }
 116
 117 static void
 118 dbg_close_ctlhandle(int fd)
 119 {
 120         sysctl_name[0] = '\0';
 121         return;
 122 }
 123
 124 static int
 125 dbg_write_cmd(int fd, char *str, int len)
 126 {
 127         int     rc;
 128
 129         rc = sysctlbyname(sysctl_name, NULL, NULL, str, len+1);
 130         if (rc != 0) {
 131                 fprintf(stderr, "sysctl %s with cmd (%s) error: %d\n",
 132                         sysctl_name, str, errno);
 133         }
 134         return (rc == 0 ? 0: 1);
 135 }
 136
 137 #else
 138 #error - Unknown sysctl convention.
 139 #endif
 140
 141 static int do_debug_mask(char *name, int enable)
 142 {
 143         int found = 0, i;
 144
 145         for (i = 0; libcfs_debug_subsystems[i] != NULL; i++) {
 146                 if (strcasecmp(name, libcfs_debug_subsystems[i]) == 0 ||
 147                     strcasecmp(name, "all_subs") == 0) {
 148                         printf("%s output from subsystem \"%s\"\n",
 149                                 enable ? "Enabling" : "Disabling",
 150                                 libcfs_debug_subsystems[i]);
 151                         if (enable)
 152                                 subsystem_mask |= (1 << i);
 153                         else
 154                                 subsystem_mask &= ~(1 << i);
 155                         found = 1;
 156                 }
 157         }
 158         for (i = 0; libcfs_debug_masks[i] != NULL; i++) {
 159                 if (strcasecmp(name, libcfs_debug_masks[i]) == 0 ||
 160                     strcasecmp(name, "all_types") == 0) {
 161                         printf("%s output of type \"%s\"\n",
 162                                 enable ? "Enabling" : "Disabling",
 163                                 libcfs_debug_masks[i]);
 164                         if (enable)
 165                                 debug_mask |= (1 << i);
 166                         else
 167                                 debug_mask &= ~(1 << i);
 168                         found = 1;
 169                 }
 170         }
 171
 172         return found;
 173 }
 174
 175 int dbg_initialize(int argc, char **argv)
 176 {
 177         return 0;
 178 }
 179
 180 int jt_dbg_filter(int argc, char **argv)
 181 {
 182         int   i;
 183
 184         if (argc < 2) {
 185                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 186                         argv[0]);
 187                 return 0;
 188         }
 189
 190         for (i = 1; i < argc; i++)
 191                 if (!do_debug_mask(argv[i], 0))
 192                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 193                                 argv[i]);
 194         return 0;
 195 }
 196
 197 int jt_dbg_show(int argc, char **argv)
 198 {
 199         int    i;
 200
 201         if (argc < 2) {
 202                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 203                         argv[0]);
 204                 return 0;
 205         }
 206
 207         for (i = 1; i < argc; i++)
 208                 if (!do_debug_mask(argv[i], 1))
 209                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 210                                 argv[i]);
 211
 212         return 0;
 213 }
 214
 215 static int applymask(char* procpath, int value)
 216 {
 217         int rc;
 218         char buf[64];
 219         int len = snprintf(buf, 64, "%d", value);
 220
 221         int fd = dbg_open_ctlhandle(procpath);
 222         if (fd == -1) {
 223                 fprintf(stderr, "Unable to open %s: %s\n",
 224                         procpath, strerror(errno));
 225                 return fd;
 226         }
 227         rc = dbg_write_cmd(fd, buf, len+1);
 228         if (rc != 0) {
 229                 fprintf(stderr, "Write to %s failed: %s\n",
 230                         procpath, strerror(errno));
 231         }
 232
 233         dbg_close_ctlhandle(fd);
 234
 235         return rc;
 236 }
 237
 238 static void applymask_all(unsigned int subs_mask, unsigned int debug_mask)
 239 {
 240         if (!dump_filename) {
 241                 applymask(SUBSYS_DEBUG_CTL_NAME, subs_mask);
 242                 applymask(DEBUG_CTL_NAME, debug_mask);
 243         } else {
 244                 struct libcfs_debug_ioctl_data data;
 245
 246                 data.hdr.ioc_len = sizeof(data);
 247                 data.hdr.ioc_version = 0;
 248                 data.subs = subs_mask;
 249                 data.debug = debug_mask;
 250
 251                 dump(OBD_DEV_ID, LIBCFS_IOC_DEBUG_MASK, &data);
 252         }
 253         printf("Applied subsystem_debug=%d, debug=%d to /proc/sys/lnet\n",
 254                subs_mask, debug_mask);
 255 }
 256
 257 int jt_dbg_list(int argc, char **argv)
 258 {
 259         int i;
 260
 261         if (argc != 2) {
 262                 fprintf(stderr, "usage: %s <subs || types>\n", argv[0]);
 263                 return 0;
 264         }
 265
 266         if (strcasecmp(argv[1], "subs") == 0) {
 267                 printf("Subsystems: all_subs");
 268                 for (i = 0; libcfs_debug_subsystems[i] != NULL; i++)
 269                         if (libcfs_debug_subsystems[i][0])
 270                                 printf(", %s", libcfs_debug_subsystems[i]);
 271                 printf("\n");
 272         } else if (strcasecmp(argv[1], "types") == 0) {
 273                 printf("Types: all_types");
 274                 for (i = 0; libcfs_debug_masks[i] != NULL; i++)
 275                         printf(", %s", libcfs_debug_masks[i]);
 276                 printf("\n");
 277         } else if (strcasecmp(argv[1], "applymasks") == 0) {
 278                 applymask_all(subsystem_mask, debug_mask);
 279         }
 280         return 0;
 281 }
 282
 283 /* all strings nul-terminated; only the struct and hdr need to be freed */
 284 struct dbg_line {
 285         struct ptldebug_header *hdr;
 286         char *file;
 287         char *fn;
 288         char *text;
 289 };
 290
 291 static int cmp_rec(const void *p1, const void *p2)
 292 {
 293         struct dbg_line *d1 = *(struct dbg_line **)p1;
 294         struct dbg_line *d2 = *(struct dbg_line **)p2;
 295
 296         if (d1->hdr->ph_sec < d2->hdr->ph_sec)
 297                 return -1;
 298         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 299             d1->hdr->ph_usec < d2->hdr->ph_usec)
 300                 return -1;
 301         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 302             d1->hdr->ph_usec == d2->hdr->ph_usec)
 303                 return 0;
 304         return 1;
 305 }
 306
 307 static void print_rec(struct dbg_line ***linevp, int used, int fdout)
 308 {
 309         struct dbg_line **linev = *linevp;
 310         int i;
 311
 312         qsort(linev, used, sizeof(struct dbg_line *), cmp_rec);
 313         for (i = 0; i < used; i++) {
 314                 struct dbg_line *line = linev[i];
 315                 struct ptldebug_header *hdr = line->hdr;
 316                 char out[4097];
 317                 char *buf = out;
 318                 int bytes;
 319                 ssize_t bytes_written;
 320
 321                 bytes = sprintf(out, "%08x:%08x:%u.%u%s:%u.%06llu:%u:%u:%u:(%s:%u:%s()) %s",
 322                                 hdr->ph_subsys, hdr->ph_mask,
 323                                 hdr->ph_cpu_id, hdr->ph_type,
 324                                 hdr->ph_flags & PH_FLAG_FIRST_RECORD ? "F" : "",
 325                                 hdr->ph_sec, (unsigned long long)hdr->ph_usec,
 326                                 hdr->ph_stack, hdr->ph_pid, hdr->ph_extern_pid,
 327                                 line->file, hdr->ph_line_num, line->fn, line->text);
 328                 while (bytes > 0) {
 329                         bytes_written = write(fdout, buf, bytes);
 330                         if (bytes_written <= 0)
 331                                 break;
 332                         bytes -= bytes_written;
 333                         buf += bytes_written;
 334                 }
 335                 free(line->hdr);
 336                 free(line);
 337         }
 338         free(linev);
 339         *linevp = NULL;
 340 }
 341
 342 static int add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp,
 343                    int used)
 344 {
 345         struct dbg_line **linev = *linevp;
 346
 347         if (used == *lenp) {
 348                 int nlen = *lenp + 4096;
 349                 int nsize = nlen * sizeof(struct dbg_line *);
 350
 351                 linev = realloc(*linevp, nsize);
 352                 if (!linev)
 353                         return -ENOMEM;
 354
 355                 *linevp = linev;
 356                 *lenp = nlen;
 357         }
 358         linev[used] = line;
 359
 360         return 0;
 361 }
 362
 363 static void dump_hdr(unsigned long long offset, struct ptldebug_header *hdr)
 364 {
 365         fprintf(stderr, "badly-formed record at offset = %llu\n", offset);
 366         fprintf(stderr, "  len = %u\n", hdr->ph_len);
 367         fprintf(stderr, "  flags = %x\n", hdr->ph_flags);
 368         fprintf(stderr, "  subsystem = %x\n", hdr->ph_subsys);
 369         fprintf(stderr, "  mask = %x\n", hdr->ph_mask);
 370         fprintf(stderr, "  cpu_id = %u\n", hdr->ph_cpu_id);
 371         fprintf(stderr, "  type = %u\n", hdr->ph_type);
 372         fprintf(stderr, "  seconds = %u\n", hdr->ph_sec);
 373         fprintf(stderr, "  microseconds = %lu\n", (long)hdr->ph_usec);
 374         fprintf(stderr, "  stack = %u\n", hdr->ph_stack);
 375         fprintf(stderr, "  pid = %u\n", hdr->ph_pid);
 376         fprintf(stderr, "  host pid = %u\n", hdr->ph_extern_pid);
 377         fprintf(stderr, "  line number = %u\n", hdr->ph_line_num);
 378 }
 379
 380 #define HDR_SIZE sizeof(*hdr)
 381
 382 static int parse_buffer(int fdin, int fdout)
 383 {
 384         struct dbg_line *line;
 385         struct ptldebug_header *hdr;
 386         char buf[4097], *ptr;
 387         unsigned long dropped = 0, kept = 0, bad = 0;
 388         struct dbg_line **linev = NULL;
 389         int linev_len = 0;
 390         int rc;
 391
 392         hdr = (void *)buf;
 393
 394         while (1) {
 395                 int first_bad = 1;
 396                 int count;
 397
 398                 count = HDR_SIZE;
 399                 ptr = buf;
 400         readhdr:
 401                 rc = read(fdin, ptr, count);
 402                 if (rc <= 0)
 403                          goto print;
 404
 405                 ptr += rc;
 406                 count -= rc;
 407                 if (count > 0)
 408                         goto readhdr;
 409
 410                 if (hdr->ph_len > 4094 ||       /* is this header bogus? */
 411                     hdr->ph_type >= libcfs_tcd_type_max() ||
 412                     hdr->ph_stack > 65536 ||
 413                     hdr->ph_sec < (1 << 30) ||
 414                     hdr->ph_usec > 1000000000 ||
 415                     hdr->ph_line_num > 65536) {
 416                         if (first_bad)
 417                                 dump_hdr(lseek(fdin, 0, SEEK_CUR), hdr);
 418                         bad += first_bad;
 419                         first_bad = 0;
 420
 421                         /* try to restart on next line */
 422                         while (count < HDR_SIZE && buf[count] != '\n')
 423                                 count++;
 424                         if (buf[count] == '\n')
 425                                 count++; /* move past '\n' */
 426                         if (HDR_SIZE - count > 0) {
 427                                 int left = HDR_SIZE - count;
 428
 429                                 memmove(buf, buf + count, left);
 430                                 ptr = buf + left;
 431
 432                                 goto readhdr;
 433                         }
 434
 435                         continue;
 436                 }
 437
 438                 if (hdr->ph_len == 0)
 439                         continue;
 440
 441                 count = hdr->ph_len - HDR_SIZE;
 442         readmore:
 443                 rc = read(fdin, ptr, count);
 444                 if (rc <= 0)
 445                         break;
 446
 447                 ptr += rc;
 448                 count -= rc;
 449                 if (count > 0)
 450                         goto readmore;
 451
 452                 first_bad = 1;
 453
 454                 if ((hdr->ph_subsys && !(subsystem_mask & hdr->ph_subsys)) ||
 455                     (hdr->ph_mask && !(debug_mask & hdr->ph_mask))) {
 456                         dropped++;
 457                         continue;
 458                 }
 459
 460         retry_alloc:
 461                 line = malloc(sizeof(*line));
 462                 if (line == NULL) {
 463                          if (linev) {
 464                                 fprintf(stderr, "error: line malloc(%u): "
 465                                         "printing accumulated records\n",
 466                                         (unsigned int)sizeof(*line));
 467                                 print_rec(&linev, kept, fdout);
 468
 469                                 goto retry_alloc;
 470                         }
 471                         fprintf(stderr, "error: line malloc(%u): exiting\n",
 472                                 (unsigned int)sizeof(*line));
 473                         break;
 474                 }
 475
 476                 line->hdr = malloc(hdr->ph_len + 1);
 477                 if (line->hdr == NULL) {
 478                         free(line);
 479                         if (linev) {
 480                                 fprintf(stderr, "error: hdr malloc(%u): "
 481                                         "printing accumulated records\n",
 482                                         hdr->ph_len + 1);
 483                                 print_rec(&linev, kept, fdout);
 484
 485                                 goto retry_alloc;
 486                         }
 487                         fprintf(stderr, "error: hdr malloc(%u): exiting\n",
 488                                         hdr->ph_len + 1);
 489                         break;
 490                 }
 491
 492                 ptr = (void *)line->hdr;
 493                 memcpy(line->hdr, buf, hdr->ph_len);
 494                 ptr[hdr->ph_len] = '\0';
 495
 496                 ptr += sizeof(*hdr);
 497                 line->file = ptr;
 498                 ptr += strlen(line->file) + 1;
 499                 line->fn = ptr;
 500                 ptr += strlen(line->fn) + 1;
 501                 line->text = ptr;
 502
 503         retry_add:
 504                 if (add_rec(line, &linev, &linev_len, kept) < 0) {
 505                         if (linev) {
 506                                 fprintf(stderr, "error: add_rec[%u] failed; "
 507                                         "print accumulated records\n",
 508                                         linev_len);
 509                                 print_rec(&linev, kept, fdout);
 510
 511                                 goto retry_add;
 512                         }
 513                         fprintf(stderr, "error: add_rec[0] failed; exiting\n");
 514                         break;
 515                 }
 516                 kept++;
 517         }
 518
 519 print:
 520         if (linev)
 521                 print_rec(&linev, kept, fdout);
 522
 523         printf("Debug log: %lu lines, %lu kept, %lu dropped, %lu bad.\n",
 524                 dropped + kept + bad, kept, dropped, bad);
 525
 526         return 0;
 527 }
 528
 529 int jt_dbg_debug_kernel(int argc, char **argv)
 530 {
 531         struct stat st;
 532         char filename[PATH_MAX];
 533         int raw = 0;
 534         int save_errno;
 535         int fdin;
 536         int fdout;
 537         int rc;
 538
 539         if (argc > 3) {
 540                 fprintf(stderr, "usage: %s [file] [raw]\n", argv[0]);
 541                 return 0;
 542         }
 543
 544         if (argc > 2) {
 545                 raw = atoi(argv[2]);
 546         } else if (argc > 1 && (argv[1][0] == '0' || argv[1][0] == '1')) {
 547                 raw = atoi(argv[1]);
 548                 argc--;
 549         }
 550
 551         /* If we are dumping raw (which means no conversion step to ASCII)
 552          * then dump directly to any supplied filename, otherwise this is
 553          * just a temp file and we dump to the real file at convert time. */
 554         if (argc > 1 && raw) {
 555                 if (strlen(argv[1]) >= sizeof(filename)) {
 556                         fprintf(stderr, "File name too long: %s\n", argv[1]);
 557                         return 1;
 558                 }
 559                 strncpy(filename, argv[1], sizeof(filename));
 560         } else {
 561                 if (snprintf(filename, sizeof(filename), "%s"CFS_TIME_T".%u",
 562                              LIBCFS_DEBUG_FILE_PATH_DEFAULT, time(NULL),
 563                              getpid())
 564                     >= sizeof(filename)) {
 565                         fprintf(stderr, "File name too long\n");
 566                         return 1;
 567                 }
 568         }
 569
 570         if (stat(filename, &st) == 0 && S_ISREG(st.st_mode))
 571                 unlink(filename);
 572
 573         fdin = dbg_open_ctlhandle(DUMP_KERNEL_CTL_NAME);
 574         if (fdin < 0) {
 575                 fprintf(stderr, "open(dump_kernel) failed: %s\n",
 576                         strerror(errno));
 577                 return 1;
 578         }
 579
 580         rc = dbg_write_cmd(fdin, filename, strlen(filename));
 581         save_errno = errno;
 582         dbg_close_ctlhandle(fdin);
 583         if (rc != 0) {
 584                 fprintf(stderr, "write(%s) failed: %s\n", filename,
 585                         strerror(save_errno));
 586                 return 1;
 587         }
 588
 589         if (raw)
 590                 return 0;
 591
 592         fdin = open(filename, O_RDONLY);
 593         if (fdin < 0) {
 594                 if (errno == ENOENT) /* no dump file created */
 595                         return 0;
 596                 fprintf(stderr, "fopen(%s) failed: %s\n", filename,
 597                         strerror(errno));
 598                 return 1;
 599         }
 600         if (argc > 1) {
 601                 fdout = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC,
 602                              S_IRUSR | S_IWUSR);
 603                 if (fdout < 0) {
 604                         fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
 605                                 strerror(errno));
 606                         close(fdin);
 607                         return 1;
 608                 }
 609         } else {
 610                 fdout = fileno(stdout);
 611         }
 612
 613         rc = parse_buffer(fdin, fdout);
 614         close(fdin);
 615         if (argc > 1)
 616                 close(fdout);
 617         if (rc) {
 618                 fprintf(stderr, "parse_buffer failed; leaving tmp file %s "
 619                         "behind.\n", filename);
 620         } else {
 621                 rc = unlink(filename);
 622                 if (rc)
 623                         fprintf(stderr, "dumped successfully, but couldn't "
 624                                 "unlink tmp file %s: %s\n", filename,
 625                                 strerror(errno));
 626         }
 627
 628         return rc;
 629 }
 630
 631 int jt_dbg_debug_file(int argc, char **argv)
 632 {
 633         int    fdin;
 634         int    fdout;
 635         int    rc;
 636
 637         if (argc > 3 || argc < 2) {
 638                 fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
 639                 return 0;
 640         }
 641
 642         fdin = open(argv[1], O_RDONLY | O_LARGEFILE);
 643         if (fdin < 0) {
 644                 fprintf(stderr, "open(%s) failed: %s\n", argv[1],
 645                         strerror(errno));
 646                 return 1;
 647         }
 648         if (argc > 2) {
 649                 fdout = open(argv[2],
 650                              O_CREAT | O_TRUNC | O_WRONLY | O_LARGEFILE,
 651                              0600);
 652                 if (fdout < 0) {
 653                         fprintf(stderr, "open(%s) failed: %s\n", argv[2],
 654                                 strerror(errno));
 655                         close(fdin);
 656                         return 1;
 657                 }
 658         } else {
 659                 fdout = fileno(stdout);
 660         }
 661
 662         rc = parse_buffer(fdin, fdout);
 663
 664         close(fdin);
 665         if (fdout != fileno(stdout))
 666                 close(fdout);
 667
 668         return rc;
 669 }
 670
 671 const char debug_daemon_usage[] = "usage: %s {start file [MB]|stop}\n";
 672
 673 int jt_dbg_debug_daemon(int argc, char **argv)
 674 {
 675         int  rc;
 676         int  fd;
 677
 678         if (argc <= 1) {
 679                 fprintf(stderr, debug_daemon_usage, argv[0]);
 680                 return 1;
 681         }
 682
 683         fd = dbg_open_ctlhandle(DAEMON_CTL_NAME);
 684         if (fd < 0)
 685                 return -1;
 686
 687         rc = -1;
 688         if (strcasecmp(argv[1], "start") == 0) {
 689              if (argc < 3 || argc > 4 ||
 690                     (argc == 4 && strlen(argv[3]) > 5)) {
 691                         fprintf(stderr, debug_daemon_usage, argv[0]);
 692                         goto out;
 693                 }
 694                 if (argc == 4) {
 695                         char       buf[12];
 696                         const long min_size = 10;
 697                         const long max_size = 20480;
 698                         long       size;
 699                         char      *end;
 700
 701                         size = strtoul(argv[3], &end, 0);
 702                         if (size < min_size ||
 703                             size > max_size ||
 704                             *end != 0) {
 705                                 fprintf(stderr, "size %s invalid, must be in "
 706                                         "the range %ld-%ld MB\n", argv[3],
 707                                         min_size, max_size);
 708                                 goto out;
 709                         }
 710                         snprintf(buf, sizeof(buf), "size=%ld", size);
 711                         rc = dbg_write_cmd(fd, buf, strlen(buf));
 712
 713                         if (rc != 0) {
 714                                 fprintf(stderr, "set %s failed: %s\n",
 715                                         buf, strerror(errno));
 716                                 goto out;
 717                         }
 718                 }
 719
 720                 rc = dbg_write_cmd(fd, argv[2], strlen(argv[2]));
 721                 if (rc != 0) {
 722                         fprintf(stderr, "start debug_daemon on %s failed: %s\n",
 723                                 argv[2], strerror(errno));
 724                         goto out;
 725                 }
 726                 rc = 0;
 727                 goto out;
 728         }
 729         if (strcasecmp(argv[1], "stop") == 0) {
 730                 rc = dbg_write_cmd(fd, "stop", 4);
 731                 if (rc != 0) {
 732                         fprintf(stderr, "stopping debug_daemon failed: %s\n",
 733                                 strerror(errno));
 734                         goto out;
 735                 }
 736
 737                 rc = 0;
 738                 goto out;
 739         }
 740
 741         fprintf(stderr, debug_daemon_usage, argv[0]);
 742         rc = -1;
 743 out:
 744         dbg_close_ctlhandle(fd);
 745         return rc;
 746 }
 747
 748 int jt_dbg_clear_debug_buf(int argc, char **argv)
 749 {
 750         int rc;
 751         struct libcfs_ioctl_data data;
 752
 753         if (argc != 1) {
 754                 fprintf(stderr, "usage: %s\n", argv[0]);
 755                 return 0;
 756         }
 757
 758         memset(&data, 0, sizeof(data));
 759         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 760                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 761                 return -1;
 762         }
 763
 764         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CLEAR_DEBUG, buf);
 765         if (rc) {
 766                 fprintf(stderr, "IOC_LIBCFS_CLEAR_DEBUG failed: %s\n",
 767                         strerror(errno));
 768                 return -1;
 769         }
 770         return 0;
 771 }
 772
 773 int jt_dbg_mark_debug_buf(int argc, char **argv)
 774 {
 775         static char scratch[MAX_MARK_SIZE] = "";
 776         struct libcfs_ioctl_data data = { 0 };
 777         char *text;
 778         int rc;
 779
 780         if (argc > 1) {
 781                 int count, max_size = sizeof(scratch) - 1;
 782
 783                 strncpy(scratch, argv[1], max_size);
 784                 max_size -= strlen(argv[1]);
 785                 for (count = 2; (count < argc) && (max_size > 1); count++) {
 786                         strncat(scratch, " ", max_size);
 787                         max_size -= 1;
 788                         strncat(scratch, argv[count], max_size);
 789                         max_size -= strlen(argv[count]);
 790                 }
 791                 scratch[sizeof(scratch) - 1] = '\0';
 792                 text = scratch;
 793         } else {
 794                 time_t now = time(NULL);
 795                 text = ctime(&now);
 796         }
 797
 798         data.ioc_inllen1 = strlen(text) + 1;
 799         data.ioc_inlbuf1 = text;
 800         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 801                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 802                 return -1;
 803         }
 804
 805         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_MARK_DEBUG, buf);
 806         if (rc) {
 807                 fprintf(stderr, "IOC_LIBCFS_MARK_DEBUG failed: %s\n",
 808                         strerror(errno));
 809                 return -1;
 810         }
 811         return 0;
 812 }
 813
 814 static struct mod_paths {
 815         char *name, *path;
 816 } mod_paths[] = {
 817         { "libcfs", "libcfs/libcfs" },
 818         { "lnet", "lnet/lnet" },
 819         { "kmxlnd", "lnet/klnds/mxlnd" },
 820         { "ko2iblnd", "lnet/klnds/o2iblnd" },
 821         { "kgnilnd", "lnet/klnds/gnilnd"},
 822         { "kqswlnd", "lnet/klnds/qswlnd" },
 823         { "kralnd", "lnet/klnds/ralnd" },
 824         { "ksocklnd", "lnet/klnds/socklnd" },
 825         { "ktdilnd", "lnet/klnds/tdilnd" },
 826         { "obdclass", "lustre/obdclass" },
 827         { "llog_test", "lustre/obdclass" },
 828         { "ptlrpc_gss", "lustre/ptlrpc/gss" },
 829         { "ptlrpc", "lustre/ptlrpc" },
 830         { "gks", "lustre/sec/gks" },
 831         { "gkc", "lustre/sec/gks" },
 832         { "ost", "lustre/ost" },
 833         { "osc", "lustre/osc" },
 834         { "mds", "lustre/mds" },
 835         { "mdc", "lustre/mdc" },
 836         { "lustre", "lustre/llite" },
 837         { "llite_lloop", "lustre/llite" },
 838         { "ldiskfs", "ldiskfs" },
 839         { "obdecho", "lustre/obdecho" },
 840         { "ldlm", "lustre/ldlm" },
 841         { "obdfilter", "lustre/obdfilter" },
 842         { "lov", "lustre/lov" },
 843         { "lmv", "lustre/lmv" },
 844         { "lquota", "lustre/quota" },
 845         { "mgs", "lustre/mgs" },
 846         { "mgc", "lustre/mgc" },
 847         { "mdt", "lustre/mdt" },
 848         { "mdd", "lustre/mdd" },
 849         { "osd", "lustre/osd" },
 850         { "cmm", "lustre/cmm" },
 851         {"fid", "lustre/fid"},
 852         {"fld", "lustre/fld"},
 853         {"lod", "lustre/lod"},
 854         {"osp", "lustre/osp"},
 855         { "lfsck", "lustre/lfsck" },
 856         {NULL, NULL}
 857 };
 858
 859 int jt_dbg_modules(int argc, char **argv)
 860 {
 861         struct mod_paths *mp;
 862         char *path = "";
 863         const char *proc = "/proc/modules";
 864         char modname[128], buf[4096];
 865         unsigned long modaddr;
 866         FILE *file;
 867
 868         if (argc >= 2)
 869                 path = argv[1];
 870         if (argc > 3) {
 871                 printf("%s [path] [kernel]\n", argv[0]);
 872                 return 0;
 873         }
 874
 875         file = fopen(proc, "r");
 876         if (!file) {
 877                 printf("failed open %s: %s\n", proc, strerror(errno));
 878                 return 0;
 879         }
 880
 881         while (fgets(buf, sizeof(buf), file) != NULL) {
 882                 if (sscanf(buf, "%s %*s %*s %*s %*s %lx", modname, &modaddr) == 2) {
 883                         for (mp = mod_paths; mp->name != NULL; mp++) {
 884                                 if (!strcmp(mp->name, modname))
 885                                         break;
 886                         }
 887                         if (mp->name) {
 888                                 printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n",
 889                                         path, path[0] ? "/" : "",
 890                                         mp->path, mp->name, modaddr);
 891                         }
 892                 }
 893         }
 894
 895         fclose(file);
 896         return 0;
 897 }
 898
 899 int jt_dbg_panic(int argc, char **argv)
 900 {
 901         int rc;
 902         struct libcfs_ioctl_data data;
 903
 904         if (argc != 1) {
 905                 fprintf(stderr, "usage: %s\n", argv[0]);
 906                 return 0;
 907         }
 908
 909         memset(&data, 0, sizeof(data));
 910         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 911                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 912                 return -1;
 913         }
 914
 915         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_PANIC, buf);
 916         if (rc) {
 917                 fprintf(stderr, "IOC_LIBCFS_PANIC failed: %s\n",
 918                         strerror(errno));
 919                 return -1;
 920         }
 921         return 0;
 922 }