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, 2015, 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 <errno.h>
  47 #include <fcntl.h>
  48 #include <limits.h>
  49 #include <stdarg.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <sys/ioctl.h>
  54 #include <sys/types.h>
  55 #include <sys/stat.h>
  56 #include <time.h>
  57 #include <unistd.h>
  58
  59 #include <linux/types.h>
  60
  61 #include <libcfs/util/ioctl.h>
  62 #include <libcfs/util/param.h>
  63 #include <libcfs/libcfs_debug.h>
  64 #include <lnet/lnetctl.h>
  65
  66 static char rawbuf[8192];
  67 static char *buf = rawbuf;
  68 static int max = 8192;
  69 /*static int g_pfd = -1;*/
  70 static int subsystem_mask = ~0;
  71 static int debug_mask = ~0;
  72
  73 #define MAX_MARK_SIZE 256
  74
  75 static const char *libcfs_debug_subsystems[] = LIBCFS_DEBUG_SUBSYS_NAMES;
  76 static const char *libcfs_debug_masks[] = LIBCFS_DEBUG_MASKS_NAMES;
  77
  78 #define DAEMON_CTL_NAME         "daemon_file"
  79 #define SUBSYS_DEBUG_CTL_NAME   "subsystem_debug"
  80 #define DEBUG_CTL_NAME          "debug"
  81 #define DUMP_KERNEL_CTL_NAME    "dump_kernel"
  82
  83 /*
  84  * Open the parameter file "debug" which controls the debugging
  85  * flags used to determine what information ends up in the lustre
  86  * logs collected by lctl dk or the debug daemon.
  87  */
  88 static int
  89 dbg_open_ctlhandle(const char *str)
  90 {
  91         glob_t path;
  92         int fd, rc;
  93
  94         rc = cfs_get_param_paths(&path, "%s", str);
  95         if (rc != 0) {
  96                 fprintf(stderr, "invalid parameter '%s'\n", str);
  97                 return -1;
  98         }
  99
 100         fd = open(path.gl_pathv[0], O_WRONLY);
 101         if (fd < 0)
 102                 fprintf(stderr, "open '%s' failed: %s\n",
 103                         path.gl_pathv[0], strerror(errno));
 104
 105         cfs_free_param_data(&path);
 106         return fd;
 107 }
 108
 109 static void
 110 dbg_close_ctlhandle(int fd)
 111 {
 112         close(fd);
 113 }
 114
 115 static int
 116 dbg_write_cmd(int fd, char *str, int len)
 117 {
 118         int rc = write(fd, str, len);
 119
 120         return (rc == len ? 0 : 1);
 121 }
 122
 123
 124 static int do_debug_mask(char *name, int enable)
 125 {
 126         int found = 0;
 127         int i;
 128
 129         for (i = 0; libcfs_debug_subsystems[i] != NULL; i++) {
 130                 if (strcasecmp(name, libcfs_debug_subsystems[i]) == 0 ||
 131                     strcasecmp(name, "all_subs") == 0) {
 132                         printf("%s output from subsystem \"%s\"\n",
 133                                 enable ? "Enabling" : "Disabling",
 134                                 libcfs_debug_subsystems[i]);
 135                         if (enable)
 136                                 subsystem_mask |= (1 << i);
 137                         else
 138                                 subsystem_mask &= ~(1 << i);
 139                         found = 1;
 140                 }
 141         }
 142         for (i = 0; libcfs_debug_masks[i] != NULL; i++) {
 143                 if (strcasecmp(name, libcfs_debug_masks[i]) == 0 ||
 144                     strcasecmp(name, "all_types") == 0) {
 145                         printf("%s output of type \"%s\"\n",
 146                                 enable ? "Enabling" : "Disabling",
 147                                 libcfs_debug_masks[i]);
 148                         if (enable)
 149                                 debug_mask |= (1 << i);
 150                         else
 151                                 debug_mask &= ~(1 << i);
 152                         found = 1;
 153                 }
 154         }
 155
 156         return found;
 157 }
 158
 159 int dbg_initialize(int argc, char **argv)
 160 {
 161         return 0;
 162 }
 163
 164 int jt_dbg_filter(int argc, char **argv)
 165 {
 166         int i;
 167
 168         if (argc < 2) {
 169                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 170                         argv[0]);
 171                 return 0;
 172         }
 173
 174         for (i = 1; i < argc; i++)
 175                 if (!do_debug_mask(argv[i], 0))
 176                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 177                                 argv[i]);
 178         return 0;
 179 }
 180
 181 int jt_dbg_show(int argc, char **argv)
 182 {
 183         int i;
 184
 185         if (argc < 2) {
 186                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 187                         argv[0]);
 188                 return 0;
 189         }
 190
 191         for (i = 1; i < argc; i++)
 192                 if (!do_debug_mask(argv[i], 1))
 193                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 194                                 argv[i]);
 195
 196         return 0;
 197 }
 198
 199 static int applymask(char *param, int value)
 200 {
 201         int     rc;
 202         char    buf[64];
 203         int     len = snprintf(buf, 64, "%d", value);
 204
 205         int fd = dbg_open_ctlhandle(param);
 206         if (fd < 0)
 207                 return fd;
 208
 209         rc = dbg_write_cmd(fd, buf, len+1);
 210         if (rc != 0) {
 211                 fprintf(stderr, "Write to %s failed: %s\n",
 212                         param, strerror(errno));
 213         }
 214
 215         dbg_close_ctlhandle(fd);
 216
 217         return rc;
 218 }
 219
 220 static void applymask_all(unsigned int subs_mask, unsigned int debug_mask)
 221 {
 222         applymask(SUBSYS_DEBUG_CTL_NAME, subs_mask);
 223         applymask(DEBUG_CTL_NAME, debug_mask);
 224         printf("Applied subsystem_debug=%d, debug=%d to lnet\n",
 225                subs_mask, debug_mask);
 226 }
 227
 228 int jt_dbg_list(int argc, char **argv)
 229 {
 230         int i;
 231
 232         if (argc != 2) {
 233                 fprintf(stderr, "usage: %s <subs || types>\n", argv[0]);
 234                 return 0;
 235         }
 236
 237         if (strcasecmp(argv[1], "subs") == 0) {
 238                 printf("Subsystems: all_subs");
 239                 for (i = 0; libcfs_debug_subsystems[i] != NULL; i++)
 240                         if (libcfs_debug_subsystems[i][0])
 241                                 printf(", %s", libcfs_debug_subsystems[i]);
 242                 printf("\n");
 243         } else if (strcasecmp(argv[1], "types") == 0) {
 244                 printf("Types: all_types");
 245                 for (i = 0; libcfs_debug_masks[i] != NULL; i++)
 246                         printf(", %s", libcfs_debug_masks[i]);
 247                 printf("\n");
 248         } else if (strcasecmp(argv[1], "applymasks") == 0) {
 249                 applymask_all(subsystem_mask, debug_mask);
 250         }
 251         return 0;
 252 }
 253
 254 /* all strings nul-terminated; only the struct and hdr need to be freed */
 255 struct dbg_line {
 256         struct ptldebug_header *hdr;
 257         char                   *file;
 258         char                   *fn;
 259         char                   *text;
 260 };
 261
 262 static int cmp_rec(const void *p1, const void *p2)
 263 {
 264         struct dbg_line *d1 = *(struct dbg_line **)p1;
 265         struct dbg_line *d2 = *(struct dbg_line **)p2;
 266
 267         if (d1->hdr->ph_sec < d2->hdr->ph_sec)
 268                 return -1;
 269         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 270             d1->hdr->ph_usec < d2->hdr->ph_usec)
 271                 return -1;
 272         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 273             d1->hdr->ph_usec == d2->hdr->ph_usec)
 274                 return 0;
 275         return 1;
 276 }
 277
 278 static void print_rec(struct dbg_line ***linevp, int used, int fdout)
 279 {
 280         struct dbg_line **linev = *linevp;
 281         int               i;
 282
 283         qsort(linev, used, sizeof(struct dbg_line *), cmp_rec);
 284         for (i = 0; i < used; i++) {
 285                 struct dbg_line         *line = linev[i];
 286                 struct ptldebug_header  *hdr = line->hdr;
 287                 char                     out[4097];
 288                 char                    *buf = out;
 289                 int                      bytes;
 290                 ssize_t                  bytes_written;
 291
 292                 bytes = snprintf(out, sizeof(out),
 293                                 "%08x:%08x:%u.%u%s:%u.%06llu:%u:%u:%u:"
 294                                 "(%s:%u:%s()) %s",
 295                                 hdr->ph_subsys, hdr->ph_mask,
 296                                 hdr->ph_cpu_id, hdr->ph_type,
 297                                 hdr->ph_flags & PH_FLAG_FIRST_RECORD ? "F" : "",
 298                                 hdr->ph_sec, (unsigned long long)hdr->ph_usec,
 299                                 hdr->ph_stack, hdr->ph_pid, hdr->ph_extern_pid,
 300                                 line->file, hdr->ph_line_num, line->fn,
 301                                 line->text);
 302                 while (bytes > 0) {
 303                         bytes_written = write(fdout, buf, bytes);
 304                         if (bytes_written <= 0)
 305                                 break;
 306                         bytes -= bytes_written;
 307                         buf += bytes_written;
 308                 }
 309                 free(line->hdr);
 310                 free(line);
 311         }
 312         free(linev);
 313         *linevp = NULL;
 314 }
 315
 316 static int add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp,
 317                    int used)
 318 {
 319         struct dbg_line **linev = *linevp;
 320
 321         if (used == *lenp) {
 322                 int nlen = *lenp + 4096;
 323                 int nsize = nlen * sizeof(struct dbg_line *);
 324
 325                 linev = realloc(*linevp, nsize);
 326                 if (!linev)
 327                         return -ENOMEM;
 328
 329                 *linevp = linev;
 330                 *lenp = nlen;
 331         }
 332         linev[used] = line;
 333
 334         return 0;
 335 }
 336
 337 static void dump_hdr(unsigned long long offset, struct ptldebug_header *hdr)
 338 {
 339         fprintf(stderr, "badly-formed record at offset = %llu\n", offset);
 340         fprintf(stderr, "  len = %u\n", hdr->ph_len);
 341         fprintf(stderr, "  flags = %x\n", hdr->ph_flags);
 342         fprintf(stderr, "  subsystem = %x\n", hdr->ph_subsys);
 343         fprintf(stderr, "  mask = %x\n", hdr->ph_mask);
 344         fprintf(stderr, "  cpu_id = %u\n", hdr->ph_cpu_id);
 345         fprintf(stderr, "  type = %u\n", hdr->ph_type);
 346         fprintf(stderr, "  seconds = %u\n", hdr->ph_sec);
 347         fprintf(stderr, "  microseconds = %lu\n", (long)hdr->ph_usec);
 348         fprintf(stderr, "  stack = %u\n", hdr->ph_stack);
 349         fprintf(stderr, "  pid = %u\n", hdr->ph_pid);
 350         fprintf(stderr, "  host pid = %u\n", hdr->ph_extern_pid);
 351         fprintf(stderr, "  line number = %u\n", hdr->ph_line_num);
 352 }
 353
 354 #define HDR_SIZE sizeof(*hdr)
 355
 356 static int parse_buffer(int fdin, int fdout)
 357 {
 358         struct dbg_line         *line;
 359         struct ptldebug_header  *hdr;
 360         char                     buf[4097];
 361         char                    *ptr;
 362         unsigned long            dropped = 0;
 363         unsigned long            kept = 0;
 364         unsigned long            bad = 0;
 365         struct dbg_line         **linev = NULL;
 366         int                      linev_len = 0;
 367         int                      rc;
 368
 369         hdr = (void *)buf;
 370
 371         while (1) {
 372                 int first_bad = 1;
 373                 int count;
 374
 375                 count = HDR_SIZE;
 376                 ptr = buf;
 377 readhdr:
 378                 rc = read(fdin, ptr, count);
 379                 if (rc <= 0)
 380                         goto print;
 381
 382                 ptr += rc;
 383                 count -= rc;
 384                 if (count > 0)
 385                         goto readhdr;
 386
 387                 if (hdr->ph_len > 4094 ||       /* is this header bogus? */
 388                     hdr->ph_stack > 65536 ||
 389                     hdr->ph_sec < (1 << 30) ||
 390                     hdr->ph_usec > 1000000000 ||
 391                     hdr->ph_line_num > 65536) {
 392                         if (first_bad)
 393                                 dump_hdr(lseek(fdin, 0, SEEK_CUR), hdr);
 394                         bad += first_bad;
 395                         first_bad = 0;
 396
 397                         /* try to restart on next line */
 398                         while (count < HDR_SIZE && buf[count] != '\n')
 399                                 count++;
 400                         if (buf[count] == '\n')
 401                                 count++; /* move past '\n' */
 402                         if (HDR_SIZE - count > 0) {
 403                                 int left = HDR_SIZE - count;
 404
 405                                 memmove(buf, buf + count, left);
 406                                 ptr = buf + left;
 407
 408                                 goto readhdr;
 409                         }
 410
 411                         continue;
 412                 }
 413
 414                 if (hdr->ph_len == 0)
 415                         continue;
 416
 417                 count = hdr->ph_len - HDR_SIZE;
 418 readmore:
 419                 rc = read(fdin, ptr, count);
 420                 if (rc <= 0)
 421                         break;
 422
 423                 ptr += rc;
 424                 count -= rc;
 425                 if (count > 0)
 426                         goto readmore;
 427
 428                 first_bad = 1;
 429
 430                 if ((hdr->ph_subsys && !(subsystem_mask & hdr->ph_subsys)) ||
 431                     (hdr->ph_mask && !(debug_mask & hdr->ph_mask))) {
 432                         dropped++;
 433                         continue;
 434                 }
 435
 436 retry_alloc:
 437                 line = malloc(sizeof(*line));
 438                 if (line == NULL) {
 439                         if (linev) {
 440                                 fprintf(stderr, "error: line malloc(%u): "
 441                                         "printing accumulated records\n",
 442                                         (unsigned int)sizeof(*line));
 443                                 print_rec(&linev, kept, fdout);
 444
 445                                 goto retry_alloc;
 446                         }
 447                         fprintf(stderr, "error: line malloc(%u): exiting\n",
 448                                 (unsigned int)sizeof(*line));
 449                         break;
 450                 }
 451
 452                 line->hdr = malloc(hdr->ph_len + 1);
 453                 if (line->hdr == NULL) {
 454                         free(line);
 455                         if (linev) {
 456                                 fprintf(stderr, "error: hdr malloc(%u): "
 457                                         "printing accumulated records\n",
 458                                         hdr->ph_len + 1);
 459                                 print_rec(&linev, kept, fdout);
 460
 461                                 goto retry_alloc;
 462                         }
 463                         fprintf(stderr, "error: hdr malloc(%u): exiting\n",
 464                                         hdr->ph_len + 1);
 465                         break;
 466                 }
 467
 468                 ptr = (void *)line->hdr;
 469                 memcpy(line->hdr, buf, hdr->ph_len);
 470                 ptr[hdr->ph_len] = '\0';
 471
 472                 ptr += sizeof(*hdr);
 473                 line->file = ptr;
 474                 ptr += strlen(line->file) + 1;
 475                 line->fn = ptr;
 476                 ptr += strlen(line->fn) + 1;
 477                 line->text = ptr;
 478
 479 retry_add:
 480                 if (add_rec(line, &linev, &linev_len, kept) < 0) {
 481                         if (linev) {
 482                                 fprintf(stderr, "error: add_rec[%u] failed; "
 483                                         "print accumulated records\n",
 484                                         linev_len);
 485                                 print_rec(&linev, kept, fdout);
 486
 487                                 goto retry_add;
 488                         }
 489                         fprintf(stderr, "error: add_rec[0] failed; exiting\n");
 490                         break;
 491                 }
 492                 kept++;
 493         }
 494
 495 print:
 496         if (linev)
 497                 print_rec(&linev, kept, fdout);
 498
 499         printf("Debug log: %lu lines, %lu kept, %lu dropped, %lu bad.\n",
 500                 dropped + kept + bad, kept, dropped, bad);
 501
 502         return 0;
 503 }
 504
 505 int jt_dbg_debug_kernel(int argc, char **argv)
 506 {
 507         struct stat     st;
 508         char            filename[PATH_MAX];
 509         int             raw = 0;
 510         int             save_errno;
 511         int             fdin;
 512         int             fdout;
 513         int             rc;
 514
 515         if (argc > 3) {
 516                 fprintf(stderr, "usage: %s [file] [raw]\n", argv[0]);
 517                 return 0;
 518         }
 519
 520         if (argc > 2) {
 521                 raw = atoi(argv[2]);
 522         } else if (argc > 1 && (argv[1][0] == '0' || argv[1][0] == '1')) {
 523                 raw = atoi(argv[1]);
 524                 argc--;
 525         }
 526
 527         /* If we are dumping raw (which means no conversion step to ASCII)
 528          * then dump directly to any supplied filename, otherwise this is
 529          * just a temp file and we dump to the real file at convert time. */
 530         if (argc > 1 && raw) {
 531                 if (strlen(argv[1]) >= sizeof(filename)) {
 532                         fprintf(stderr, "File name too long: %s\n", argv[1]);
 533                         return 1;
 534                 }
 535                 strncpy(filename, argv[1], sizeof(filename));
 536         } else {
 537                 if (snprintf(filename, sizeof(filename), "%s%lu.%u",
 538                              LIBCFS_DEBUG_FILE_PATH_DEFAULT, time(NULL),
 539                              getpid())
 540                     >= sizeof(filename)) {
 541                         fprintf(stderr, "File name too long\n");
 542                         return 1;
 543                 }
 544         }
 545
 546         if (stat(filename, &st) == 0 && S_ISREG(st.st_mode))
 547                 unlink(filename);
 548
 549         fdin = dbg_open_ctlhandle(DUMP_KERNEL_CTL_NAME);
 550         if (fdin < 0) {
 551                 fprintf(stderr, "open(dump_kernel) failed: %s\n",
 552                         strerror(errno));
 553                 return 1;
 554         }
 555
 556         rc = dbg_write_cmd(fdin, filename, strlen(filename));
 557         save_errno = errno;
 558         dbg_close_ctlhandle(fdin);
 559         if (rc != 0) {
 560                 fprintf(stderr, "write(%s) failed: %s\n", filename,
 561                         strerror(save_errno));
 562                 return 1;
 563         }
 564
 565         if (raw)
 566                 return 0;
 567
 568         fdin = open(filename, O_RDONLY);
 569         if (fdin < 0) {
 570                 if (errno == ENOENT) /* no dump file created */
 571                         return 0;
 572                 fprintf(stderr, "fopen(%s) failed: %s\n", filename,
 573                         strerror(errno));
 574                 return 1;
 575         }
 576         if (argc > 1) {
 577                 fdout = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC,
 578                              S_IRUSR | S_IWUSR);
 579                 if (fdout < 0) {
 580                         fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
 581                                 strerror(errno));
 582                         close(fdin);
 583                         return 1;
 584                 }
 585         } else {
 586                 fdout = fileno(stdout);
 587         }
 588
 589         rc = parse_buffer(fdin, fdout);
 590         close(fdin);
 591         if (argc > 1)
 592                 close(fdout);
 593         if (rc) {
 594                 fprintf(stderr, "parse_buffer failed; leaving tmp file %s "
 595                         "behind.\n", filename);
 596         } else {
 597                 rc = unlink(filename);
 598                 if (rc)
 599                         fprintf(stderr, "dumped successfully, but couldn't "
 600                                 "unlink tmp file %s: %s\n", filename,
 601                                 strerror(errno));
 602         }
 603
 604         return rc;
 605 }
 606
 607 int jt_dbg_debug_file(int argc, char **argv)
 608 {
 609         int fdin;
 610         int fdout;
 611         int rc;
 612
 613         if (argc > 3 || argc < 2) {
 614                 fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
 615                 return 0;
 616         }
 617
 618         fdin = open(argv[1], O_RDONLY | O_LARGEFILE);
 619         if (fdin < 0) {
 620                 fprintf(stderr, "open(%s) failed: %s\n", argv[1],
 621                         strerror(errno));
 622                 return 1;
 623         }
 624         if (argc > 2) {
 625                 fdout = open(argv[2],
 626                              O_CREAT | O_TRUNC | O_WRONLY | O_LARGEFILE,
 627                              0600);
 628                 if (fdout < 0) {
 629                         fprintf(stderr, "open(%s) failed: %s\n", argv[2],
 630                                 strerror(errno));
 631                         close(fdin);
 632                         return 1;
 633                 }
 634         } else {
 635                 fdout = fileno(stdout);
 636         }
 637
 638         rc = parse_buffer(fdin, fdout);
 639
 640         close(fdin);
 641         if (fdout != fileno(stdout))
 642                 close(fdout);
 643
 644         return rc;
 645 }
 646
 647 const char debug_daemon_usage[] = "usage: %s {start file [MB]|stop}\n";
 648
 649 int jt_dbg_debug_daemon(int argc, char **argv)
 650 {
 651         int rc;
 652         int fd;
 653
 654         if (argc <= 1) {
 655                 fprintf(stderr, debug_daemon_usage, argv[0]);
 656                 return 1;
 657         }
 658
 659         fd = dbg_open_ctlhandle(DAEMON_CTL_NAME);
 660         if (fd < 0)
 661                 return -1;
 662
 663         rc = -1;
 664         if (strcasecmp(argv[1], "start") == 0) {
 665                 if (argc < 3 || argc > 4 ||
 666                     (argc == 4 && strlen(argv[3]) > 5)) {
 667                         fprintf(stderr, debug_daemon_usage, argv[0]);
 668                         goto out;
 669                 }
 670                 if (argc == 4) {
 671                         char             buf[12];
 672                         const long       min_size = 10;
 673                         const long       max_size = 20480;
 674                         long             size;
 675                         char            *end;
 676
 677                         size = strtoul(argv[3], &end, 0);
 678                         if (size < min_size ||
 679                             size > max_size ||
 680                             *end != 0) {
 681                                 fprintf(stderr, "size %s invalid, must be in "
 682                                         "the range %ld-%ld MB\n", argv[3],
 683                                         min_size, max_size);
 684                                 goto out;
 685                         }
 686                         snprintf(buf, sizeof(buf), "size=%ld", size);
 687                         rc = dbg_write_cmd(fd, buf, strlen(buf));
 688
 689                         if (rc != 0) {
 690                                 fprintf(stderr, "set %s failed: %s\n",
 691                                         buf, strerror(errno));
 692                                 goto out;
 693                         }
 694                 }
 695
 696                 rc = dbg_write_cmd(fd, argv[2], strlen(argv[2]));
 697                 if (rc != 0) {
 698                         fprintf(stderr, "start debug_daemon on %s failed: %s\n",
 699                                 argv[2], strerror(errno));
 700                         goto out;
 701                 }
 702                 rc = 0;
 703                 goto out;
 704         }
 705         if (strcasecmp(argv[1], "stop") == 0) {
 706                 rc = dbg_write_cmd(fd, "stop", 4);
 707                 if (rc != 0) {
 708                         fprintf(stderr, "stopping debug_daemon failed: %s\n",
 709                                 strerror(errno));
 710                         goto out;
 711                 }
 712
 713                 rc = 0;
 714                 goto out;
 715         }
 716
 717         fprintf(stderr, debug_daemon_usage, argv[0]);
 718         rc = -1;
 719 out:
 720         dbg_close_ctlhandle(fd);
 721         return rc;
 722 }
 723
 724 int jt_dbg_clear_debug_buf(int argc, char **argv)
 725 {
 726         int                      rc;
 727         struct libcfs_ioctl_data data;
 728
 729         if (argc != 1) {
 730                 fprintf(stderr, "usage: %s\n", argv[0]);
 731                 return 0;
 732         }
 733
 734         memset(&data, 0, sizeof(data));
 735         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 736                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 737                 return -1;
 738         }
 739
 740         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CLEAR_DEBUG, buf);
 741         if (rc) {
 742                 fprintf(stderr, "IOC_LIBCFS_CLEAR_DEBUG failed: %s\n",
 743                         strerror(errno));
 744                 return -1;
 745         }
 746         return 0;
 747 }
 748
 749 int jt_dbg_mark_debug_buf(int argc, char **argv)
 750 {
 751         static char              scratch[MAX_MARK_SIZE] = "";
 752         struct libcfs_ioctl_data data;
 753         char                    *text;
 754         int                      rc;
 755
 756         memset(&data, 0, sizeof(data));
 757
 758         if (argc > 1) {
 759                 int count, max_size = sizeof(scratch) - 1;
 760
 761                 strncpy(scratch, argv[1], max_size);
 762                 max_size -= strlen(argv[1]);
 763                 for (count = 2; (count < argc) && (max_size > 1); count++) {
 764                         strncat(scratch, " ", max_size);
 765                         max_size -= 1;
 766                         strncat(scratch, argv[count], max_size);
 767                         max_size -= strlen(argv[count]);
 768                 }
 769                 scratch[sizeof(scratch) - 1] = '\0';
 770                 text = scratch;
 771         } else {
 772                 time_t now = time(NULL);
 773                 text = ctime(&now);
 774         }
 775
 776         data.ioc_inllen1 = strlen(text) + 1;
 777         data.ioc_inlbuf1 = text;
 778
 779         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 780                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 781                 return -1;
 782         }
 783
 784         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_MARK_DEBUG, buf);
 785         if (rc) {
 786                 fprintf(stderr, "IOC_LIBCFS_MARK_DEBUG failed: %s\n",
 787                         strerror(errno));
 788                 return -1;
 789         }
 790         return 0;
 791 }
 792
 793 static struct mod_paths {
 794         char *name, *path;
 795 } mod_paths[] = {
 796         { "libcfs", "libcfs/libcfs" },
 797         { "lnet", "lnet/lnet" },
 798         { "ko2iblnd", "lnet/klnds/o2iblnd" },
 799         { "kgnilnd", "lnet/klnds/gnilnd"},
 800         { "ksocklnd", "lnet/klnds/socklnd" },
 801         { "obdclass", "lustre/obdclass" },
 802         { "llog_test", "lustre/obdclass" },
 803         { "ptlrpc_gss", "lustre/ptlrpc/gss" },
 804         { "ptlrpc", "lustre/ptlrpc" },
 805         { "gks", "lustre/sec/gks" },
 806         { "gkc", "lustre/sec/gks" },
 807         { "ost", "lustre/ost" },
 808         { "osc", "lustre/osc" },
 809         { "mds", "lustre/mds" },
 810         { "mdc", "lustre/mdc" },
 811         { "lustre", "lustre/llite" },
 812         { "llite_lloop", "lustre/llite" },
 813         { "ldiskfs", "ldiskfs" },
 814         { "obdecho", "lustre/obdecho" },
 815         { "ldlm", "lustre/ldlm" },
 816         { "obdfilter", "lustre/obdfilter" },
 817         { "lov", "lustre/lov" },
 818         { "lmv", "lustre/lmv" },
 819         { "lquota", "lustre/quota" },
 820         { "mgs", "lustre/mgs" },
 821         { "mgc", "lustre/mgc" },
 822         { "mdt", "lustre/mdt" },
 823         { "mdd", "lustre/mdd" },
 824         { "osd", "lustre/osd" },
 825         { "cmm", "lustre/cmm" },
 826         {"fid", "lustre/fid"},
 827         {"fld", "lustre/fld"},
 828         {"lod", "lustre/lod"},
 829         {"osp", "lustre/osp"},
 830         { "lfsck", "lustre/lfsck" },
 831         {NULL, NULL}
 832 };
 833
 834 int jt_dbg_modules(int argc, char **argv)
 835 {
 836         struct mod_paths *mp;
 837         char             *path = "";
 838         const char       *proc = "/proc/modules";
 839         char              modname[128];
 840         char              buf[4096];
 841         unsigned long     modaddr;
 842         FILE             *file;
 843
 844         if (argc >= 2)
 845                 path = argv[1];
 846         if (argc > 3) {
 847                 printf("%s [path] [kernel]\n", argv[0]);
 848                 return 0;
 849         }
 850
 851         file = fopen(proc, "r");
 852         if (!file) {
 853                 printf("failed open %s: %s\n", proc, strerror(errno));
 854                 return 0;
 855         }
 856
 857         while (fgets(buf, sizeof(buf), file) != NULL) {
 858                 if (sscanf(buf, "%s %*s %*s %*s %*s %lx",
 859                            modname, &modaddr) == 2) {
 860                         for (mp = mod_paths; mp->name != NULL; mp++) {
 861                                 if (!strcmp(mp->name, modname))
 862                                         break;
 863                         }
 864                         if (mp->name) {
 865                                 printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n",
 866                                         path, path[0] ? "/" : "",
 867                                         mp->path, mp->name, modaddr);
 868                         }
 869                 }
 870         }
 871
 872         fclose(file);
 873         return 0;
 874 }