lnet/utils/debug.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 <stdio.h>
  47 #ifdef HAVE_NETDB_H
  48 #include <netdb.h>
  49 #endif
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #ifdef HAVE_SYS_IOCTL_H
  53 #include <sys/ioctl.h>
  54 #endif
  55 #ifndef _IOWR
  56 #include "ioctl.h"
  57 #endif
  58 #include <fcntl.h>
  59 #include <errno.h>
  60 #include <unistd.h>
  61 #include <assert.h>
  62
  63 #include <sys/types.h>
  64 #include <sys/socket.h>
  65 #include <sys/stat.h>
  66 #include <sys/mman.h>
  67 #include <sys/utsname.h>
  68
  69 #include <libcfs/libcfsutil.h>
  70 #include <lnet/lnetctl.h>
  71 #include <libcfs/portals_utils.h>
  72
  73 #include <time.h>
  74
  75 static char rawbuf[8192];
  76 static char *buf = rawbuf;
  77 static int max = 8192;
  78 /*static int g_pfd = -1;*/
  79 static int subsystem_mask = ~0;
  80 static int debug_mask = ~0;
  81
  82 #define MAX_MARK_SIZE 256
  83
  84 static const char *libcfs_debug_subsystems[] =
  85         {"undefined", "mdc", "mds", "osc",
  86          "ost", "class", "log", "llite",
  87          "rpc", "mgmt", "lnet", "lnd",
  88          "pinger", "filter", "", "echo",
  89          "ldlm", "lov", "", "",
  90          "", "", "", "lmv",
  91          "", "sec", "gss", "",
  92          "mgc", "mgs", "fid", "fld", NULL};
  93 static const char *libcfs_debug_masks[] =
  94         {"trace", "inode", "super", "ext2",
  95          "malloc", "cache", "info", "ioctl",
  96          "neterror", "net", "warning", "buffs",
  97          "other", "dentry", "nettrace", "page",
  98          "dlmtrace", "error", "emerg", "ha",
  99          "rpctrace", "vfstrace", "reada", "mmap",
 100          "config", "console", "quota", "sec", NULL};
 101
 102 #ifdef __linux__
 103
 104 #define DAEMON_CTL_NAME         "/proc/sys/lnet/daemon_file"
 105 #define SUBSYS_DEBUG_CTL_NAME   "/proc/sys/lnet/subsystem_debug"
 106 #define DEBUG_CTL_NAME          "/proc/sys/lnet/debug"
 107 #define DUMP_KERNEL_CTL_NAME    "/proc/sys/lnet/dump_kernel"
 108
 109 static int
 110 dbg_open_ctlhandle(const char *str)
 111 {
 112         int fd;
 113         fd = open(str, O_WRONLY);
 114         if (fd < 0) {
 115                 fprintf(stderr, "open %s failed: %s\n", str,
 116                         strerror(errno));
 117                 return -1;
 118         }
 119         return fd;
 120 }
 121
 122 static void
 123 dbg_close_ctlhandle(int fd)
 124 {
 125         close(fd);
 126 }
 127
 128 static int
 129 dbg_write_cmd(int fd, char *str, int len)
 130 {
 131         int    rc  = write(fd, str, len);
 132
 133         return (rc == len ? 0 : 1);
 134 }
 135
 136 #elif defined(__DARWIN__)
 137
 138 #define DAEMON_CTL_NAME         "lnet.trace_daemon"
 139 #define SUBSYS_DEBUG_CTL_NAME   "lnet.subsystem_debug"
 140 #define DEBUG_CTL_NAME          "lnet.debug"
 141 #define DUMP_KERNEL_CTL_NAME    "lnet.trace_dumpkernel"
 142
 143 static char     sysctl_name[128];
 144 static int
 145 dbg_open_ctlhandle(const char *str)
 146 {
 147
 148         if (strlen(str)+1 > 128) {
 149                 fprintf(stderr, "sysctl name is too long: %s.\n", str);
 150                 return -1;
 151         }
 152         strcpy(sysctl_name, str);
 153
 154         return 0;
 155 }
 156
 157 static void
 158 dbg_close_ctlhandle(int fd)
 159 {
 160         sysctl_name[0] = '\0';
 161         return;
 162 }
 163
 164 static int
 165 dbg_write_cmd(int fd, char *str, int len)
 166 {
 167         int     rc;
 168
 169         rc = sysctlbyname(sysctl_name, NULL, NULL, str, len+1);
 170         if (rc != 0) {
 171                 fprintf(stderr, "sysctl %s with cmd (%s) error: %d\n",
 172                         sysctl_name, str, errno);
 173         }
 174         return (rc == 0 ? 0: 1);
 175 }
 176
 177 #else
 178 #error - Unknown sysctl convention.
 179 #endif
 180
 181 static int do_debug_mask(char *name, int enable)
 182 {
 183         int found = 0, i;
 184
 185         for (i = 0; libcfs_debug_subsystems[i] != NULL; i++) {
 186                 if (strcasecmp(name, libcfs_debug_subsystems[i]) == 0 ||
 187                     strcasecmp(name, "all_subs") == 0) {
 188                         printf("%s output from subsystem \"%s\"\n",
 189                                 enable ? "Enabling" : "Disabling",
 190                                 libcfs_debug_subsystems[i]);
 191                         if (enable)
 192                                 subsystem_mask |= (1 << i);
 193                         else
 194                                 subsystem_mask &= ~(1 << i);
 195                         found = 1;
 196                 }
 197         }
 198         for (i = 0; libcfs_debug_masks[i] != NULL; i++) {
 199                 if (strcasecmp(name, libcfs_debug_masks[i]) == 0 ||
 200                     strcasecmp(name, "all_types") == 0) {
 201                         printf("%s output of type \"%s\"\n",
 202                                 enable ? "Enabling" : "Disabling",
 203                                 libcfs_debug_masks[i]);
 204                         if (enable)
 205                                 debug_mask |= (1 << i);
 206                         else
 207                                 debug_mask &= ~(1 << i);
 208                         found = 1;
 209                 }
 210         }
 211
 212         return found;
 213 }
 214
 215 int dbg_initialize(int argc, char **argv)
 216 {
 217         return 0;
 218 }
 219
 220 int jt_dbg_filter(int argc, char **argv)
 221 {
 222         int   i;
 223
 224         if (argc < 2) {
 225                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 226                         argv[0]);
 227                 return 0;
 228         }
 229
 230         for (i = 1; i < argc; i++)
 231                 if (!do_debug_mask(argv[i], 0))
 232                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 233                                 argv[i]);
 234         return 0;
 235 }
 236
 237 int jt_dbg_show(int argc, char **argv)
 238 {
 239         int    i;
 240
 241         if (argc < 2) {
 242                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 243                         argv[0]);
 244                 return 0;
 245         }
 246
 247         for (i = 1; i < argc; i++)
 248                 if (!do_debug_mask(argv[i], 1))
 249                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 250                                 argv[i]);
 251
 252         return 0;
 253 }
 254
 255 static int applymask(char* procpath, int value)
 256 {
 257         int rc;
 258         char buf[64];
 259         int len = snprintf(buf, 64, "%d", value);
 260
 261         int fd = dbg_open_ctlhandle(procpath);
 262         if (fd == -1) {
 263                 fprintf(stderr, "Unable to open %s: %s\n",
 264                         procpath, strerror(errno));
 265                 return fd;
 266         }
 267         rc = dbg_write_cmd(fd, buf, len+1);
 268         if (rc != 0) {
 269                 fprintf(stderr, "Write to %s failed: %s\n",
 270                         procpath, strerror(errno));
 271                 return rc;
 272         }
 273         dbg_close_ctlhandle(fd);
 274         return 0;
 275 }
 276
 277 static void applymask_all(unsigned int subs_mask, unsigned int debug_mask)
 278 {
 279         if (!dump_filename) {
 280                 applymask(SUBSYS_DEBUG_CTL_NAME, subs_mask);
 281                 applymask(DEBUG_CTL_NAME, debug_mask);
 282         } else {
 283                 struct libcfs_debug_ioctl_data data;
 284
 285                 data.hdr.ioc_len = sizeof(data);
 286                 data.hdr.ioc_version = 0;
 287                 data.subs = subs_mask;
 288                 data.debug = debug_mask;
 289
 290                 dump(OBD_DEV_ID, LIBCFS_IOC_DEBUG_MASK, &data);
 291         }
 292         printf("Applied subsystem_debug=%d, debug=%d to /proc/sys/lnet\n",
 293                subs_mask, debug_mask);
 294 }
 295
 296 int jt_dbg_list(int argc, char **argv)
 297 {
 298         int i;
 299
 300         if (argc != 2) {
 301                 fprintf(stderr, "usage: %s <subs || types>\n", argv[0]);
 302                 return 0;
 303         }
 304
 305         if (strcasecmp(argv[1], "subs") == 0) {
 306                 printf("Subsystems: all_subs");
 307                 for (i = 0; libcfs_debug_subsystems[i] != NULL; i++)
 308                         if (libcfs_debug_subsystems[i][0])
 309                                 printf(", %s", libcfs_debug_subsystems[i]);
 310                 printf("\n");
 311         } else if (strcasecmp(argv[1], "types") == 0) {
 312                 printf("Types: all_types");
 313                 for (i = 0; libcfs_debug_masks[i] != NULL; i++)
 314                         printf(", %s", libcfs_debug_masks[i]);
 315                 printf("\n");
 316         } else if (strcasecmp(argv[1], "applymasks") == 0) {
 317                 applymask_all(subsystem_mask, debug_mask);
 318         }
 319         return 0;
 320 }
 321
 322 /* all strings nul-terminated; only the struct and hdr need to be freed */
 323 struct dbg_line {
 324         struct ptldebug_header *hdr;
 325         char *file;
 326         char *fn;
 327         char *text;
 328 };
 329
 330 static int cmp_rec(const void *p1, const void *p2)
 331 {
 332         struct dbg_line *d1 = *(struct dbg_line **)p1;
 333         struct dbg_line *d2 = *(struct dbg_line **)p2;
 334
 335         if (d1->hdr->ph_sec < d2->hdr->ph_sec)
 336                 return -1;
 337         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 338             d1->hdr->ph_usec < d2->hdr->ph_usec)
 339                 return -1;
 340         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 341             d1->hdr->ph_usec == d2->hdr->ph_usec)
 342                 return 0;
 343         return 1;
 344 }
 345
 346 static void print_rec(struct dbg_line **linev, int used, FILE *out)
 347 {
 348         int i;
 349
 350         for (i = 0; i < used; i++) {
 351                 struct dbg_line *line = linev[i];
 352                 struct ptldebug_header *hdr = line->hdr;
 353
 354                 fprintf(out, "%08x:%08x:%u:%u.%06llu:%u:%u:%u:(%s:%u:%s()) %s",
 355                         hdr->ph_subsys, hdr->ph_mask, hdr->ph_cpu_id,
 356                         hdr->ph_sec, (unsigned long long)hdr->ph_usec,
 357                         hdr->ph_stack, hdr->ph_pid, hdr->ph_extern_pid,
 358                         line->file, hdr->ph_line_num, line->fn, line->text);
 359                 free(line->hdr);
 360                 free(line);
 361         }
 362         free(linev);
 363 }
 364
 365 static int add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp,
 366                    int used)
 367 {
 368         struct dbg_line **linev = *linevp;
 369
 370         if (used == *lenp) {
 371                 int nlen = *lenp + 512;
 372                 int nsize = nlen * sizeof(struct dbg_line *);
 373
 374                 linev = *linevp ? realloc(*linevp, nsize) : malloc(nsize);
 375                 if (!linev)
 376                         return 0;
 377                 *linevp = linev;
 378                 *lenp = nlen;
 379         }
 380         linev[used] = line;
 381         return 1;
 382 }
 383
 384 static int parse_buffer(FILE *in, FILE *out)
 385 {
 386         struct dbg_line *line;
 387         struct ptldebug_header *hdr;
 388         char buf[4097], *p;
 389         int rc;
 390         unsigned long dropped = 0, kept = 0;
 391         struct dbg_line **linev = NULL;
 392         int linev_len = 0;
 393
 394         while (1) {
 395                 rc = fread(buf, sizeof(hdr->ph_len) + sizeof(hdr->ph_flags), 1, in);
 396                 if (rc <= 0)
 397                         break;
 398
 399                 hdr = (void *)buf;
 400                 if (hdr->ph_len == 0)
 401                         break;
 402                 if (hdr->ph_len > 4094) {
 403                         fprintf(stderr, "unexpected large record: %d bytes.  "
 404                                 "aborting.\n",
 405                                 hdr->ph_len);
 406                         break;
 407                 }
 408
 409                 rc = fread(buf + sizeof(hdr->ph_len) + sizeof(hdr->ph_flags), 1,
 410                            hdr->ph_len - sizeof(hdr->ph_len) - sizeof(hdr->ph_flags), in);
 411                 if (rc <= 0)
 412                         break;
 413
 414                 if ((hdr->ph_subsys && !(subsystem_mask & hdr->ph_subsys)) ||
 415                     (hdr->ph_mask   && !(debug_mask & hdr->ph_mask))) {
 416                         dropped++;
 417                         continue;
 418                 }
 419
 420                 line = malloc(sizeof(*line));
 421                 if (line == NULL) {
 422                         fprintf(stderr, "malloc failed; printing accumulated "
 423                                 "records and exiting.\n");
 424                         break;
 425                 }
 426
 427                 line->hdr = malloc(hdr->ph_len + 1);
 428                 if (line->hdr == NULL) {
 429                         free(line);
 430                         fprintf(stderr, "malloc failed; printing accumulated "
 431                                 "records and exiting.\n");
 432                         break;
 433                 }
 434
 435                 p = (void *)line->hdr;
 436                 memcpy(line->hdr, buf, hdr->ph_len);
 437                 p[hdr->ph_len] = '\0';
 438
 439                 p += sizeof(*hdr);
 440                 line->file = p;
 441                 p += strlen(line->file) + 1;
 442                 line->fn = p;
 443                 p += strlen(line->fn) + 1;
 444                 line->text = p;
 445
 446                 if (!add_rec(line, &linev, &linev_len, kept)) {
 447                         fprintf(stderr, "malloc failed; printing accumulated "
 448                                 "records and exiting.\n");
 449                         break;
 450                 }
 451                 kept++;
 452         }
 453
 454         if (linev) {
 455                 qsort(linev, kept, sizeof(struct dbg_line *), cmp_rec);
 456                 print_rec(linev, kept, out);
 457         }
 458
 459         printf("Debug log: %lu lines, %lu kept, %lu dropped.\n",
 460                 dropped + kept, kept, dropped);
 461         return 0;
 462 }
 463
 464 int jt_dbg_debug_kernel(int argc, char **argv)
 465 {
 466         char filename[4096];
 467         struct stat st;
 468         int rc, raw = 0, fd;
 469         FILE *in, *out = stdout;
 470
 471         if (argc > 3) {
 472                 fprintf(stderr, "usage: %s [file] [raw]\n", argv[0]);
 473                 return 0;
 474         }
 475
 476         if (argc > 2) {
 477                 raw = atoi(argv[2]);
 478         } else if (argc > 1 && (argv[1][0] == '0' || argv[1][0] == '1')) {
 479                 raw = atoi(argv[1]);
 480                 argc--;
 481         }
 482
 483         /* If we are dumping raw (which means no conversion step to ASCII)
 484          * then dump directly to any supplied filename, otherwise this is
 485          * just a temp file and we dump to the real file at convert time. */
 486         if (argc > 1 && raw)
 487                 strcpy(filename, argv[1]);
 488         else
 489                 sprintf(filename, "/tmp/lustre-log."CFS_TIME_T".%u",
 490                         time(NULL),getpid());
 491
 492         if (stat(filename, &st) == 0 && S_ISREG(st.st_mode))
 493                 unlink(filename);
 494
 495         fd = dbg_open_ctlhandle(DUMP_KERNEL_CTL_NAME);
 496         if (fd < 0) {
 497                 fprintf(stderr, "open(dump_kernel) failed: %s\n",
 498                         strerror(errno));
 499                 return 1;
 500         }
 501
 502         rc = dbg_write_cmd(fd, filename, strlen(filename));
 503         if (rc != 0) {
 504                 fprintf(stderr, "write(%s) failed: %s\n", filename,
 505                         strerror(errno));
 506                 close(fd);
 507                 return 1;
 508         }
 509         dbg_close_ctlhandle(fd);
 510
 511         if (raw)
 512                 return 0;
 513
 514         in = fopen(filename, "r");
 515         if (in == NULL) {
 516                 if (errno == ENOENT) /* no dump file created */
 517                         return 0;
 518
 519                 fprintf(stderr, "fopen(%s) failed: %s\n", filename,
 520                         strerror(errno));
 521                 return 1;
 522         }
 523         if (argc > 1) {
 524                 out = fopen(argv[1], "w");
 525                 if (out == NULL) {
 526                         fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
 527                                 strerror(errno));
 528                         fclose(in);
 529                         return 1;
 530                 }
 531         }
 532
 533         rc = parse_buffer(in, out);
 534         fclose(in);
 535         if (argc > 1)
 536                 fclose(out);
 537         if (rc) {
 538                 fprintf(stderr, "parse_buffer failed; leaving tmp file %s "
 539                         "behind.\n", filename);
 540         } else {
 541                 rc = unlink(filename);
 542                 if (rc)
 543                         fprintf(stderr, "dumped successfully, but couldn't "
 544                                 "unlink tmp file %s: %s\n", filename,
 545                                 strerror(errno));
 546         }
 547         return rc;
 548 }
 549
 550 int jt_dbg_debug_file(int argc, char **argv)
 551 {
 552         int    fdin;
 553         int    fdout;
 554         FILE  *in;
 555         FILE  *out = stdout;
 556         int    rc;
 557
 558         if (argc > 3 || argc < 2) {
 559                 fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
 560                 return 0;
 561         }
 562
 563         fdin = open(argv[1], O_RDONLY | O_LARGEFILE);
 564         if (fdin == -1) {
 565                 fprintf(stderr, "open(%s) failed: %s\n", argv[1],
 566                         strerror(errno));
 567                 return 1;
 568         }
 569         in = fdopen(fdin, "r");
 570         if (in == NULL) {
 571                 fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
 572                         strerror(errno));
 573                 close(fdin);
 574                 return 1;
 575         }
 576         if (argc > 2) {
 577                 fdout = open(argv[2],
 578                              O_CREAT | O_TRUNC | O_WRONLY | O_LARGEFILE,
 579                              0600);
 580                 if (fdout == -1) {
 581                         fprintf(stderr, "open(%s) failed: %s\n", argv[2],
 582                                 strerror(errno));
 583                         fclose(in);
 584                         return 1;
 585                 }
 586                 out = fdopen(fdout, "w");
 587                 if (out == NULL) {
 588                         fprintf(stderr, "fopen(%s) failed: %s\n", argv[2],
 589                                 strerror(errno));
 590                         fclose(in);
 591                         close(fdout);
 592                         return 1;
 593                 }
 594         }
 595
 596         rc = parse_buffer(in, out);
 597
 598         fclose(in);
 599         if (out != stdout)
 600                 fclose(out);
 601
 602         return rc;
 603 }
 604
 605 const char debug_daemon_usage[] = "usage: %s {start file [MB]|stop}\n";
 606
 607 int jt_dbg_debug_daemon(int argc, char **argv)
 608 {
 609         int  rc;
 610         int  fd;
 611
 612         if (argc <= 1) {
 613                 fprintf(stderr, debug_daemon_usage, argv[0]);
 614                 return 1;
 615         }
 616
 617         fd = dbg_open_ctlhandle(DAEMON_CTL_NAME);
 618         if (fd < 0)
 619                 return -1;
 620
 621         rc = -1;
 622         if (strcasecmp(argv[1], "start") == 0) {
 623              if (argc < 3 || argc > 4 ||
 624                     (argc == 4 && strlen(argv[3]) > 5)) {
 625                         fprintf(stderr, debug_daemon_usage, argv[0]);
 626                         goto out;
 627                 }
 628                 if (argc == 4) {
 629                         char       buf[12];
 630                         const long min_size = 10;
 631                         const long max_size = 20480;
 632                         long       size;
 633                         char      *end;
 634
 635                         size = strtoul(argv[3], &end, 0);
 636                         if (size < min_size ||
 637                             size > max_size ||
 638                             *end != 0) {
 639                                 fprintf(stderr, "size %s invalid, must be in "
 640                                         "the range %ld-%ld MB\n", argv[3],
 641                                         min_size, max_size);
 642                                 goto out;
 643                         }
 644                         snprintf(buf, sizeof(buf), "size=%ld", size);
 645                         rc = dbg_write_cmd(fd, buf, strlen(buf));
 646
 647                         if (rc != 0) {
 648                                 fprintf(stderr, "set %s failed: %s\n",
 649                                         buf, strerror(errno));
 650                                 goto out;
 651                         }
 652                 }
 653
 654                 rc = dbg_write_cmd(fd, argv[2], strlen(argv[2]));
 655                 if (rc != 0) {
 656                         fprintf(stderr, "start debug_daemon on %s failed: %s\n",
 657                                 argv[2], strerror(errno));
 658                         goto out;
 659                 }
 660                 rc = 0;
 661                 goto out;
 662         }
 663         if (strcasecmp(argv[1], "stop") == 0) {
 664                 rc = dbg_write_cmd(fd, "stop", 4);
 665                 if (rc != 0) {
 666                         fprintf(stderr, "stopping debug_daemon failed: %s\n",
 667                                 strerror(errno));
 668                         goto out;
 669                 }
 670
 671                 rc = 0;
 672                 goto out;
 673         }
 674
 675         fprintf(stderr, debug_daemon_usage, argv[0]);
 676         rc = -1;
 677 out:
 678         dbg_close_ctlhandle(fd);
 679         return rc;
 680 }
 681
 682 int jt_dbg_clear_debug_buf(int argc, char **argv)
 683 {
 684         int rc;
 685         struct libcfs_ioctl_data data;
 686
 687         if (argc != 1) {
 688                 fprintf(stderr, "usage: %s\n", argv[0]);
 689                 return 0;
 690         }
 691
 692         memset(&data, 0, sizeof(data));
 693         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 694                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 695                 return -1;
 696         }
 697
 698         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CLEAR_DEBUG, buf);
 699         if (rc) {
 700                 fprintf(stderr, "IOC_LIBCFS_CLEAR_DEBUG failed: %s\n",
 701                         strerror(errno));
 702                 return -1;
 703         }
 704         return 0;
 705 }
 706
 707 int jt_dbg_mark_debug_buf(int argc, char **argv)
 708 {
 709         static char scratch[MAX_MARK_SIZE] = { '\0' };
 710         int rc, max_size = MAX_MARK_SIZE-1;
 711         struct libcfs_ioctl_data data = { 0 };
 712         char *text;
 713         time_t now = time(NULL);
 714
 715         if (argc > 1) {
 716                 int count;
 717                 text = scratch;
 718                 strncpy(text, argv[1], max_size);
 719                 max_size-=strlen(argv[1]);
 720                 for (count = 2; (count < argc) && (max_size > 0); count++){
 721                         strncat(text, " ", max_size);
 722                         max_size -= 1;
 723                         strncat(text, argv[count], max_size);
 724                         max_size -= strlen(argv[count]);
 725                 }
 726         } else {
 727                 text = ctime(&now);
 728         }
 729
 730         data.ioc_inllen1 = strlen(text) + 1;
 731         data.ioc_inlbuf1 = text;
 732         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 733                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 734                 return -1;
 735         }
 736
 737         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_MARK_DEBUG, buf);
 738         if (rc) {
 739                 fprintf(stderr, "IOC_LIBCFS_MARK_DEBUG failed: %s\n",
 740                         strerror(errno));
 741                 return -1;
 742         }
 743         return 0;
 744 }
 745
 746 static struct mod_paths {
 747         char *name, *path;
 748 } mod_paths[] = {
 749         {"libcfs", "libcfs/libcfs"},
 750         {"lnet", "lnet/lnet"},
 751         {"kciblnd", "lnet/klnds/ciblnd"},
 752         {"kgmlnd", "lnet/klnds/gmlnd"},
 753         {"kmxlnd", "lnet/klnds/mxlnd"},
 754         {"kiiblnd", "lnet/klnds/iiblnd"},
 755         {"ko2iblnd", "lnet/klnds/o2iblnd"},
 756         {"kopeniblnd", "lnet/klnds/openiblnd"},
 757         {"kptllnd", "lnet/klnds/ptllnd"},
 758         {"kqswlnd", "lnet/klnds/qswlnd"},
 759         {"kralnd", "lnet/klnds/ralnd"},
 760         {"ksocklnd", "lnet/klnds/socklnd"},
 761         {"ktdilnd", "lnet/klnds/tdilnd"},
 762         {"kviblnd", "lnet/klnds/viblnd"},
 763         {"lvfs", "lustre/lvfs"},
 764         {"obdclass", "lustre/obdclass"},
 765         {"llog_test", "lustre/obdclass"},
 766         {"ptlrpc_gss", "lustre/ptlrpc/gss"},
 767         {"ptlrpc", "lustre/ptlrpc"},
 768         {"gks", "lustre/sec/gks"},
 769         {"gkc", "lustre/sec/gks"},
 770         {"ost", "lustre/ost"},
 771         {"osc", "lustre/osc"},
 772         {"mds", "lustre/mds"},
 773         {"mdc", "lustre/mdc"},
 774         {"llite", "lustre/llite"},
 775         {"lustre", "lustre/llite"},
 776         {"llite_lloop", "lustre/llite"},
 777         {"ldiskfs", "ldiskfs/ldiskfs"},
 778         {"smfs", "lustre/smfs"},
 779         {"obdecho", "lustre/obdecho"},
 780         {"ldlm", "lustre/ldlm"},
 781         {"obdfilter", "lustre/obdfilter"},
 782         {"lov", "lustre/lov"},
 783         {"lmv", "lustre/lmv"},
 784         {"fsfilt_ext3", "lustre/lvfs"},
 785         {"fsfilt_reiserfs", "lustre/lvfs"},
 786         {"fsfilt_smfs", "lustre/lvfs"},
 787         {"fsfilt_ldiskfs", "lustre/lvfs"},
 788         {"mds_ext3", "lustre/mds"},
 789         {"cobd", "lustre/cobd"},
 790         {"cmobd", "lustre/cmobd"},
 791         {"lquota", "lustre/quota"},
 792         {"mgs", "lustre/mgs"},
 793         {"mgc", "lustre/mgc"},
 794         {"mdt", "lustre/mdt"},
 795         {"mdd", "lustre/mdd"},
 796         {"osd", "lustre/osd"},
 797         {"cmm", "lustre/cmm"},
 798         {"fid", "lustre/fid"},
 799         {"fld", "lustre/fld"},
 800         {NULL, NULL}
 801 };
 802
 803 static int jt_dbg_modules_2_4(int argc, char **argv)
 804 {
 805 #ifdef HAVE_LINUX_VERSION_H
 806 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 807         struct mod_paths *mp;
 808         char *path = "";
 809         char *kernel = "linux";
 810
 811         if (argc >= 2)
 812                 path = argv[1];
 813         if (argc == 3)
 814                 kernel = argv[2];
 815         if (argc > 3) {
 816                 printf("%s [path] [kernel]\n", argv[0]);
 817                 return 0;
 818         }
 819
 820         for (mp = mod_paths; mp->name != NULL; mp++) {
 821                 struct module_info info;
 822                 int rc;
 823                 size_t crap;
 824                 int query_module(const char *name, int which, void *buf,
 825                                  size_t bufsize, size_t *ret);
 826
 827                 rc = query_module(mp->name, QM_INFO, &info, sizeof(info),
 828                                   &crap);
 829                 if (rc < 0) {
 830                         if (errno != ENOENT)
 831                                 printf("query_module(%s) failed: %s\n",
 832                                        mp->name, strerror(errno));
 833                 } else {
 834                         printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n", path,
 835                                path[0] ? "/" : "", mp->path, mp->name,
 836                                info.addr + sizeof(struct module));
 837                 }
 838         }
 839
 840         return 0;
 841 #endif // Headers are 2.6-only
 842 #endif // !HAVE_LINUX_VERSION_H
 843         return -EINVAL;
 844 }
 845
 846 static int jt_dbg_modules_2_5(int argc, char **argv)
 847 {
 848         struct mod_paths *mp;
 849         char *path = "";
 850         char *kernel = "linux";
 851         const char *proc = "/proc/modules";
 852         char modname[128], others[4096];
 853         long modaddr;
 854         int rc;
 855         FILE *file;
 856
 857         if (argc >= 2)
 858                 path = argv[1];
 859         if (argc == 3)
 860                 kernel = argv[2];
 861         if (argc > 3) {
 862                 printf("%s [path] [kernel]\n", argv[0]);
 863                 return 0;
 864         }
 865
 866         file = fopen(proc, "r");
 867         if (!file) {
 868                 printf("failed open %s: %s\n", proc, strerror(errno));
 869                 return 0;
 870         }
 871
 872         while ((rc = fscanf(file, "%s %s %s %s %s %lx\n",
 873                 modname, others, others, others, others, &modaddr)) == 6) {
 874                 for (mp = mod_paths; mp->name != NULL; mp++) {
 875                         if (!strcmp(mp->name, modname))
 876                                 break;
 877                 }
 878                 if (mp->name) {
 879                         printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n", path,
 880                                path[0] ? "/" : "", mp->path, mp->name, modaddr);
 881                 }
 882         }
 883
 884         fclose(file);
 885         return 0;
 886 }
 887
 888 int jt_dbg_modules(int argc, char **argv)
 889 {
 890         int rc = 0;
 891         struct utsname sysinfo;
 892
 893         rc = uname(&sysinfo);
 894         if (rc) {
 895                 printf("uname() failed: %s\n", strerror(errno));
 896                 return 0;
 897         }
 898
 899         if (sysinfo.release[2] > '4') {
 900                 return jt_dbg_modules_2_5(argc, argv);
 901         } else {
 902                 return jt_dbg_modules_2_4(argc, argv);
 903         }
 904
 905         return 0;
 906 }
 907
 908 int jt_dbg_panic(int argc, char **argv)
 909 {
 910         int rc;
 911         struct libcfs_ioctl_data data;
 912
 913         if (argc != 1) {
 914                 fprintf(stderr, "usage: %s\n", argv[0]);
 915                 return 0;
 916         }
 917
 918         memset(&data, 0, sizeof(data));
 919         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 920                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 921                 return -1;
 922         }
 923
 924         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_PANIC, buf);
 925         if (rc) {
 926                 fprintf(stderr, "IOC_LIBCFS_PANIC failed: %s\n",
 927                         strerror(errno));
 928                 return -1;
 929         }
 930         return 0;
 931 }