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