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