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 <lnet/api-support.h>
  70 #include <lnet/lnetctl.h>
  71 #include <libcfs/portals_utils.h>
  72 #include "parser.h"
  73
  74 #include <time.h>
  75
  76 static char rawbuf[8192];
  77 static char *buf = rawbuf;
  78 static int max = 8192;
  79 /*static int g_pfd = -1;*/
  80 static int subsystem_mask = ~0;
  81 static int debug_mask = ~0;
  82
  83 #define MAX_MARK_SIZE 256
  84
  85 static const char *libcfs_debug_subsystems[] =
  86         {"undefined", "mdc", "mds", "osc",
  87          "ost", "class", "log", "llite",
  88          "rpc", "mgmt", "lnet", "lnd",
  89          "pinger", "filter", "", "echo",
  90          "ldlm", "lov", "lquota", "",
  91          "", "", "", "lmv",
  92          "", "sec", "gss", "",
  93          "mgc", "mgs", "fid", "fld", NULL};
  94 static const char *libcfs_debug_masks[] =
  95         {"trace", "inode", "super", "ext2",
  96          "malloc", "cache", "info", "ioctl",
  97          "neterror", "net", "warning", "buffs",
  98          "other", "dentry", "nettrace", "page",
  99          "dlmtrace", "error", "emerg", "ha",
 100          "rpctrace", "vfstrace", "reada", "mmap",
 101          "config", "console", "quota", "sec", NULL};
 102
 103 struct debug_daemon_cmd {
 104         char *cmd;
 105         unsigned int cmdv;
 106 };
 107
 108 static const struct debug_daemon_cmd libcfs_debug_daemon_cmd[] = {
 109         {"start", DEBUG_DAEMON_START},
 110         {"stop", DEBUG_DAEMON_STOP},
 111         {0, 0}
 112 };
 113
 114 #ifdef __linux__
 115
 116 #define DAEMON_CTL_NAME         "/proc/sys/lnet/daemon_file"
 117 #define SUBSYS_DEBUG_CTL_NAME   "/proc/sys/lnet/subsystem_debug"
 118 #define DEBUG_CTL_NAME          "/proc/sys/lnet/debug"
 119 #define DUMP_KERNEL_CTL_NAME    "/proc/sys/lnet/dump_kernel"
 120
 121 static int
 122 dbg_open_ctlhandle(const char *str)
 123 {
 124         int fd;
 125         fd = open(str, O_WRONLY);
 126         if (fd < 0) {
 127                 fprintf(stderr, "open %s failed: %s\n", str,
 128                         strerror(errno));
 129                 return -1;
 130         }
 131         return fd;
 132 }
 133
 134 static void
 135 dbg_close_ctlhandle(int fd)
 136 {
 137         close(fd);
 138 }
 139
 140 static int
 141 dbg_write_cmd(int fd, char *str, int len)
 142 {
 143         int    rc  = write(fd, str, len);
 144
 145         return (rc == len ? 0 : 1);
 146 }
 147
 148 #elif defined(__DARWIN__)
 149
 150 #define DAEMON_CTL_NAME         "lnet.trace_daemon"
 151 #define SUBSYS_DEBUG_CTL_NAME   "lnet.subsystem_debug"
 152 #define DEBUG_CTL_NAME          "lnet.debug"
 153 #define DUMP_KERNEL_CTL_NAME    "lnet.trace_dumpkernel"
 154
 155 static char     sysctl_name[128];
 156 static int
 157 dbg_open_ctlhandle(const char *str)
 158 {
 159
 160         if (strlen(str)+1 > 128) {
 161                 fprintf(stderr, "sysctl name is too long: %s.\n", str);
 162                 return -1;
 163         }
 164         strcpy(sysctl_name, str);
 165
 166         return 0;
 167 }
 168
 169 static void
 170 dbg_close_ctlhandle(int fd)
 171 {
 172         sysctl_name[0] = '\0';
 173         return;
 174 }
 175
 176 static int
 177 dbg_write_cmd(int fd, char *str, int len)
 178 {
 179         int     rc;
 180
 181         rc = sysctlbyname(sysctl_name, NULL, NULL, str, len+1);
 182         if (rc != 0) {
 183                 fprintf(stderr, "sysctl %s with cmd (%s) error: %d\n",
 184                         sysctl_name, str, errno);
 185         }
 186         return (rc == 0 ? 0: 1);
 187 }
 188
 189 #else
 190 #error - Unknown sysctl convention.
 191 #endif
 192
 193 static int do_debug_mask(char *name, int enable)
 194 {
 195         int found = 0, i;
 196
 197         for (i = 0; libcfs_debug_subsystems[i] != NULL; i++) {
 198                 if (strcasecmp(name, libcfs_debug_subsystems[i]) == 0 ||
 199                     strcasecmp(name, "all_subs") == 0) {
 200                         printf("%s output from subsystem \"%s\"\n",
 201                                 enable ? "Enabling" : "Disabling",
 202                                 libcfs_debug_subsystems[i]);
 203                         if (enable)
 204                                 subsystem_mask |= (1 << i);
 205                         else
 206                                 subsystem_mask &= ~(1 << i);
 207                         found = 1;
 208                 }
 209         }
 210         for (i = 0; libcfs_debug_masks[i] != NULL; i++) {
 211                 if (strcasecmp(name, libcfs_debug_masks[i]) == 0 ||
 212                     strcasecmp(name, "all_types") == 0) {
 213                         printf("%s output of type \"%s\"\n",
 214                                 enable ? "Enabling" : "Disabling",
 215                                 libcfs_debug_masks[i]);
 216                         if (enable)
 217                                 debug_mask |= (1 << i);
 218                         else
 219                                 debug_mask &= ~(1 << i);
 220                         found = 1;
 221                 }
 222         }
 223
 224         return found;
 225 }
 226
 227 int dbg_initialize(int argc, char **argv)
 228 {
 229         return 0;
 230 }
 231
 232 int jt_dbg_filter(int argc, char **argv)
 233 {
 234         int   i;
 235
 236         if (argc < 2) {
 237                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 238                         argv[0]);
 239                 return 0;
 240         }
 241
 242         for (i = 1; i < argc; i++)
 243                 if (!do_debug_mask(argv[i], 0))
 244                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 245                                 argv[i]);
 246         return 0;
 247 }
 248
 249 int jt_dbg_show(int argc, char **argv)
 250 {
 251         int    i;
 252
 253         if (argc < 2) {
 254                 fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
 255                         argv[0]);
 256                 return 0;
 257         }
 258
 259         for (i = 1; i < argc; i++)
 260                 if (!do_debug_mask(argv[i], 1))
 261                         fprintf(stderr, "Unknown subsystem or debug type: %s\n",
 262                                 argv[i]);
 263
 264         return 0;
 265 }
 266
 267 static int applymask(char* procpath, int value)
 268 {
 269         int rc;
 270         char buf[64];
 271         int len = snprintf(buf, 64, "%d", value);
 272
 273         int fd = dbg_open_ctlhandle(procpath);
 274         if (fd == -1) {
 275                 fprintf(stderr, "Unable to open %s: %s\n",
 276                         procpath, strerror(errno));
 277                 return fd;
 278         }
 279         rc = dbg_write_cmd(fd, buf, len+1);
 280         if (rc != 0) {
 281                 fprintf(stderr, "Write to %s failed: %s\n",
 282                         procpath, strerror(errno));
 283         }
 284
 285         dbg_close_ctlhandle(fd);
 286
 287         return rc;
 288 }
 289
 290 static void applymask_all(unsigned int subs_mask, unsigned int debug_mask)
 291 {
 292         if (!dump_filename) {
 293                 applymask(SUBSYS_DEBUG_CTL_NAME, subs_mask);
 294                 applymask(DEBUG_CTL_NAME, debug_mask);
 295         } else {
 296                 struct libcfs_debug_ioctl_data data;
 297
 298                 data.hdr.ioc_len = sizeof(data);
 299                 data.hdr.ioc_version = 0;
 300                 data.subs = subs_mask;
 301                 data.debug = debug_mask;
 302
 303                 dump(OBD_DEV_ID, LIBCFS_IOC_DEBUG_MASK, &data);
 304         }
 305         printf("Applied subsystem_debug=%d, debug=%d to /proc/sys/lnet\n",
 306                subs_mask, debug_mask);
 307 }
 308
 309 int jt_dbg_list(int argc, char **argv)
 310 {
 311         int i;
 312
 313         if (argc != 2) {
 314                 fprintf(stderr, "usage: %s <subs || types>\n", argv[0]);
 315                 return 0;
 316         }
 317
 318         if (strcasecmp(argv[1], "subs") == 0) {
 319                 printf("Subsystems: all_subs");
 320                 for (i = 0; libcfs_debug_subsystems[i] != NULL; i++)
 321                         if (libcfs_debug_subsystems[i][0])
 322                                 printf(", %s", libcfs_debug_subsystems[i]);
 323                 printf("\n");
 324         } else if (strcasecmp(argv[1], "types") == 0) {
 325                 printf("Types: all_types");
 326                 for (i = 0; libcfs_debug_masks[i] != NULL; i++)
 327                         printf(", %s", libcfs_debug_masks[i]);
 328                 printf("\n");
 329         } else if (strcasecmp(argv[1], "applymasks") == 0) {
 330                 applymask_all(subsystem_mask, debug_mask);
 331         }
 332         return 0;
 333 }
 334
 335 /* all strings nul-terminated; only the struct and hdr need to be freed */
 336 struct dbg_line {
 337         struct ptldebug_header *hdr;
 338         char *file;
 339         char *fn;
 340         char *text;
 341 };
 342
 343 static int cmp_rec(const void *p1, const void *p2)
 344 {
 345         struct dbg_line *d1 = *(struct dbg_line **)p1;
 346         struct dbg_line *d2 = *(struct dbg_line **)p2;
 347
 348         if (d1->hdr->ph_sec < d2->hdr->ph_sec)
 349                 return -1;
 350         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 351             d1->hdr->ph_usec < d2->hdr->ph_usec)
 352                 return -1;
 353         if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
 354             d1->hdr->ph_usec == d2->hdr->ph_usec)
 355                 return 0;
 356         return 1;
 357 }
 358
 359 static void print_rec(struct dbg_line ***linevp, int used, int fdout)
 360 {
 361         struct dbg_line **linev = *linevp;
 362         int i;
 363
 364         qsort(linev, used, sizeof(struct dbg_line *), cmp_rec);
 365         for (i = 0; i < used; i++) {
 366                 struct dbg_line *line = linev[i];
 367                 struct ptldebug_header *hdr = line->hdr;
 368                 char out[4097];
 369                 char *buf = out;
 370                 int bytes;
 371                 ssize_t bytes_written;
 372
 373                 bytes = sprintf(out, "%08x:%08x:%u:%u.%06llu:%u:%u:%u:(%s:%u:%s()) %s",
 374                                 hdr->ph_subsys, hdr->ph_mask, hdr->ph_cpu_id,
 375                                 hdr->ph_sec, (unsigned long long)hdr->ph_usec,
 376                                 hdr->ph_stack, hdr->ph_pid, hdr->ph_extern_pid,
 377                                 line->file, hdr->ph_line_num, line->fn, line->text);
 378                 while (bytes > 0) {
 379                         bytes_written = write(fdout, buf, bytes);
 380                         if (bytes_written <= 0)
 381                                 break;
 382                         bytes -= bytes_written;
 383                         buf += bytes_written;
 384                 }
 385                 free(line->hdr);
 386                 free(line);
 387         }
 388         free(linev);
 389         *linevp = NULL;
 390 }
 391
 392 static int add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp,
 393                    int used)
 394 {
 395         struct dbg_line **linev = *linevp;
 396
 397         if (used == *lenp) {
 398                 int nlen = *lenp + 4096;
 399                 int nsize = nlen * sizeof(struct dbg_line *);
 400
 401                 linev = realloc(*linevp, nsize);
 402                 if (!linev)
 403                         return -ENOMEM;
 404
 405                 *linevp = linev;
 406                 *lenp = nlen;
 407         }
 408         linev[used] = line;
 409
 410         return 0;
 411 }
 412
 413 static void dump_hdr(unsigned long long offset, struct ptldebug_header *hdr)
 414 {
 415         fprintf(stderr, "badly-formed record at offset = %llu\n", offset);
 416         fprintf(stderr, "  len = %u\n", hdr->ph_len);
 417         fprintf(stderr, "  flags = %x\n", hdr->ph_flags);
 418         fprintf(stderr, "  subsystem = %x\n", hdr->ph_subsys);
 419         fprintf(stderr, "  mask = %x\n", hdr->ph_mask);
 420         fprintf(stderr, "  cpu_id = %u\n", hdr->ph_cpu_id);
 421         fprintf(stderr, "  seconds = %u\n", hdr->ph_sec);
 422         fprintf(stderr, "  microseconds = %lu\n", (long)hdr->ph_usec);
 423         fprintf(stderr, "  stack = %u\n", hdr->ph_stack);
 424         fprintf(stderr, "  pid = %u\n", hdr->ph_pid);
 425         fprintf(stderr, "  host pid = %u\n", hdr->ph_extern_pid);
 426         fprintf(stderr, "  line number = %u\n", hdr->ph_line_num);
 427 }
 428
 429 #define HDR_SIZE sizeof(*hdr)
 430
 431 static int parse_buffer(int fdin, int fdout)
 432 {
 433         struct dbg_line *line;
 434         struct ptldebug_header *hdr;
 435         char buf[4097], *ptr;
 436         unsigned long dropped = 0, kept = 0, bad = 0;
 437         struct dbg_line **linev = NULL;
 438         int linev_len = 0;
 439         int rc;
 440
 441         hdr = (void *)buf;
 442
 443         while (1) {
 444                 int first_bad = 1;
 445                 int count;
 446
 447                 count = HDR_SIZE;
 448                 ptr = buf;
 449         readhdr:
 450                 rc = read(fdin, ptr, count);
 451                 if (rc <= 0)
 452                          goto print;
 453
 454                 ptr += rc;
 455                 count -= rc;
 456                 if (count > 0)
 457                         goto readhdr;
 458
 459                 if (hdr->ph_len > 4094 ||       /* is this header bogus? */
 460                     hdr->ph_cpu_id > 65536 ||
 461                     hdr->ph_stack > 65536 ||
 462                     hdr->ph_sec < (1 << 30) ||
 463                     hdr->ph_usec > 1000000000 ||
 464                     hdr->ph_line_num > 65536) {
 465                         if (first_bad)
 466                                 dump_hdr(lseek(fdin, 0, SEEK_CUR), hdr);
 467                         bad += first_bad;
 468                         first_bad = 0;
 469
 470                         /* try to restart on next line */
 471                         while (count < HDR_SIZE && buf[count] != '\n')
 472                                 count++;
 473                         if (buf[count] == '\n')
 474                                 count++; /* move past '\n' */
 475                         if (HDR_SIZE - count > 0) {
 476                                 int left = HDR_SIZE - count;
 477
 478                                 memmove(buf, buf + count, left);
 479                                 ptr = buf + left;
 480
 481                                 goto readhdr;
 482                         }
 483
 484                         continue;
 485                 }
 486
 487                 if (hdr->ph_len == 0)
 488                         continue;
 489
 490                 count = hdr->ph_len - HDR_SIZE;
 491         readmore:
 492                 rc = read(fdin, ptr, count);
 493                 if (rc <= 0)
 494                         break;
 495
 496                 ptr += rc;
 497                 count -= rc;
 498                 if (count > 0)
 499                         goto readmore;
 500
 501                 first_bad = 1;
 502
 503                 if ((hdr->ph_subsys && !(subsystem_mask & hdr->ph_subsys)) ||
 504                     (hdr->ph_mask && !(debug_mask & hdr->ph_mask))) {
 505                         dropped++;
 506                         continue;
 507                 }
 508
 509         retry_alloc:
 510                 line = malloc(sizeof(*line));
 511                 if (line == NULL) {
 512                          if (linev) {
 513                                 fprintf(stderr, "error: line malloc(%u): "
 514                                         "printing accumulated records\n",
 515                                         (unsigned int)sizeof(*line));
 516                                 print_rec(&linev, kept, fdout);
 517
 518                                 goto retry_alloc;
 519                         }
 520                         fprintf(stderr, "error: line malloc(%u): exiting\n",
 521                                 (unsigned int)sizeof(*line));
 522                         break;
 523                 }
 524
 525                 line->hdr = malloc(hdr->ph_len + 1);
 526                 if (line->hdr == NULL) {
 527                         free(line);
 528                         if (linev) {
 529                                 fprintf(stderr, "error: hdr malloc(%u): "
 530                                         "printing accumulated records\n",
 531                                         hdr->ph_len + 1);
 532                                 print_rec(&linev, kept, fdout);
 533
 534                                 goto retry_alloc;
 535                         }
 536                         fprintf(stderr, "error: hdr malloc(%u): exiting\n",
 537                                         hdr->ph_len + 1);
 538                         break;
 539                 }
 540
 541                 ptr = (void *)line->hdr;
 542                 memcpy(line->hdr, buf, hdr->ph_len);
 543                 ptr[hdr->ph_len] = '\0';
 544
 545                 ptr += sizeof(*hdr);
 546                 line->file = ptr;
 547                 ptr += strlen(line->file) + 1;
 548                 line->fn = ptr;
 549                 ptr += strlen(line->fn) + 1;
 550                 line->text = ptr;
 551
 552         retry_add:
 553                 if (add_rec(line, &linev, &linev_len, kept) < 0) {
 554                         if (linev) {
 555                                 fprintf(stderr, "error: add_rec[%u] failed; "
 556                                         "print accumulated records\n",
 557                                         linev_len);
 558                                 print_rec(&linev, kept, fdout);
 559
 560                                 goto retry_add;
 561                         }
 562                         fprintf(stderr, "error: add_rec[0] failed; exiting\n");
 563                         break;
 564                 }
 565                 kept++;
 566         }
 567
 568 print:
 569         if (linev)
 570                 print_rec(&linev, kept, fdout);
 571
 572         printf("Debug log: %lu lines, %lu kept, %lu dropped, %lu bad.\n",
 573                 dropped + kept + bad, kept, dropped, bad);
 574
 575         return 0;
 576 }
 577
 578 int jt_dbg_debug_kernel(int argc, char **argv)
 579 {
 580         char filename[4096];
 581         struct stat st;
 582         int raw = 0;
 583         int save_errno;
 584         int fdin;
 585         int fdout;
 586         int rc;
 587
 588         if (argc > 3) {
 589                 fprintf(stderr, "usage: %s [file] [raw]\n", argv[0]);
 590                 return 0;
 591         }
 592
 593         if (argc > 2) {
 594                 raw = atoi(argv[2]);
 595         } else if (argc > 1 && (argv[1][0] == '0' || argv[1][0] == '1')) {
 596                 raw = atoi(argv[1]);
 597                 argc--;
 598         }
 599
 600         /* If we are dumping raw (which means no conversion step to ASCII)
 601          * then dump directly to any supplied filename, otherwise this is
 602          * just a temp file and we dump to the real file at convert time. */
 603         if (argc > 1 && raw)
 604                 strcpy(filename, argv[1]);
 605         else
 606                 sprintf(filename, "/tmp/lustre-log."CFS_TIME_T".%u",
 607                         time(NULL),getpid());
 608
 609         if (stat(filename, &st) == 0 && S_ISREG(st.st_mode))
 610                 unlink(filename);
 611
 612         fdin = dbg_open_ctlhandle(DUMP_KERNEL_CTL_NAME);
 613         if (fdin < 0) {
 614                 fprintf(stderr, "open(dump_kernel) failed: %s\n",
 615                         strerror(errno));
 616                 return 1;
 617         }
 618
 619         rc = dbg_write_cmd(fdin, filename, strlen(filename));
 620         save_errno = errno;
 621         dbg_close_ctlhandle(fdin);
 622         if (rc != 0) {
 623                 fprintf(stderr, "write(%s) failed: %s\n", filename,
 624                         strerror(save_errno));
 625                 return 1;
 626         }
 627
 628         if (raw)
 629                 return 0;
 630
 631         fdin = open(filename, O_RDONLY);
 632         if (fdin < 0) {
 633                 if (errno == ENOENT) /* no dump file created */
 634                         return 0;
 635
 636                 fprintf(stderr, "fopen(%s) failed: %s\n", filename,
 637                         strerror(errno));
 638                 return 1;
 639         }
 640         if (argc > 1) {
 641                 fdout = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC,
 642                              S_IRUSR | S_IWUSR);
 643                 if (fdout < 0) {
 644                         fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
 645                                 strerror(errno));
 646                         close(fdin);
 647                         return 1;
 648                 }
 649         } else {
 650                 fdout = fileno(stdout);
 651         }
 652
 653         rc = parse_buffer(fdin, fdout);
 654         close(fdin);
 655         if (argc > 1)
 656                 close(fdout);
 657         if (rc) {
 658                 fprintf(stderr, "parse_buffer failed; leaving tmp file %s "
 659                         "behind.\n", filename);
 660         } else {
 661                 rc = unlink(filename);
 662                 if (rc)
 663                         fprintf(stderr, "dumped successfully, but couldn't "
 664                                 "unlink tmp file %s: %s\n", filename,
 665                                 strerror(errno));
 666         }
 667
 668         return rc;
 669 }
 670
 671 int jt_dbg_debug_file(int argc, char **argv)
 672 {
 673         int    fdin;
 674         int    fdout;
 675         int    rc;
 676
 677         if (argc > 3 || argc < 2) {
 678                 fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
 679                 return 0;
 680         }
 681
 682         fdin = open(argv[1], O_RDONLY | O_LARGEFILE);
 683         if (fdin < 0) {
 684                 fprintf(stderr, "open(%s) failed: %s\n", argv[1],
 685                         strerror(errno));
 686                 return 1;
 687         }
 688         if (argc > 2) {
 689                 fdout = open(argv[2],
 690                              O_CREAT | O_TRUNC | O_WRONLY | O_LARGEFILE,
 691                              0600);
 692                 if (fdout < 0) {
 693                         fprintf(stderr, "open(%s) failed: %s\n", argv[2],
 694                                 strerror(errno));
 695                         close(fdin);
 696                         return 1;
 697                 }
 698         } else {
 699                 fdout = fileno(stdout);
 700         }
 701
 702         rc = parse_buffer(fdin, fdout);
 703
 704         close(fdin);
 705         if (fdout != fileno(stdout))
 706                 close(fdout);
 707
 708         return rc;
 709 }
 710
 711 const char debug_daemon_usage[] = "usage: %s {start file [MB]|stop}\n";
 712
 713 int jt_dbg_debug_daemon(int argc, char **argv)
 714 {
 715         int  rc;
 716         int  fd;
 717
 718         if (argc <= 1) {
 719                 fprintf(stderr, debug_daemon_usage, argv[0]);
 720                 return 1;
 721         }
 722
 723         fd = dbg_open_ctlhandle(DAEMON_CTL_NAME);
 724         if (fd < 0)
 725                 return -1;
 726
 727         rc = -1;
 728         if (strcasecmp(argv[1], "start") == 0) {
 729              if (argc < 3 || argc > 4 ||
 730                     (argc == 4 && strlen(argv[3]) > 5)) {
 731                         fprintf(stderr, debug_daemon_usage, argv[0]);
 732                         goto out;
 733                 }
 734                 if (argc == 4) {
 735                         char       buf[12];
 736                         const long min_size = 10;
 737                         const long max_size = 20480;
 738                         long       size;
 739                         char      *end;
 740
 741                         size = strtoul(argv[3], &end, 0);
 742                         if (size < min_size ||
 743                             size > max_size ||
 744                             *end != 0) {
 745                                 fprintf(stderr, "size %s invalid, must be in "
 746                                         "the range %ld-%ld MB\n", argv[3],
 747                                         min_size, max_size);
 748                                 goto out;
 749                         }
 750                         snprintf(buf, sizeof(buf), "size=%ld", size);
 751                         rc = dbg_write_cmd(fd, buf, strlen(buf));
 752
 753                         if (rc != 0) {
 754                                 fprintf(stderr, "set %s failed: %s\n",
 755                                         buf, strerror(errno));
 756                                 goto out;
 757                         }
 758                 }
 759
 760                 rc = dbg_write_cmd(fd, argv[2], strlen(argv[2]));
 761                 if (rc != 0) {
 762                         fprintf(stderr, "start debug_daemon on %s failed: %s\n",
 763                                 argv[2], strerror(errno));
 764                         goto out;
 765                 }
 766                 rc = 0;
 767                 goto out;
 768         }
 769         if (strcasecmp(argv[1], "stop") == 0) {
 770                 rc = dbg_write_cmd(fd, "stop", 4);
 771                 if (rc != 0) {
 772                         fprintf(stderr, "stopping debug_daemon failed: %s\n",
 773                                 strerror(errno));
 774                         goto out;
 775                 }
 776
 777                 rc = 0;
 778                 goto out;
 779         }
 780
 781         fprintf(stderr, debug_daemon_usage, argv[0]);
 782         rc = -1;
 783 out:
 784         dbg_close_ctlhandle(fd);
 785         return rc;
 786 }
 787
 788 int jt_dbg_clear_debug_buf(int argc, char **argv)
 789 {
 790         int rc;
 791         struct libcfs_ioctl_data data;
 792
 793         if (argc != 1) {
 794                 fprintf(stderr, "usage: %s\n", argv[0]);
 795                 return 0;
 796         }
 797
 798         memset(&data, 0, sizeof(data));
 799         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 800                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 801                 return -1;
 802         }
 803
 804         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CLEAR_DEBUG, buf);
 805         if (rc) {
 806                 fprintf(stderr, "IOC_LIBCFS_CLEAR_DEBUG failed: %s\n",
 807                         strerror(errno));
 808                 return -1;
 809         }
 810         return 0;
 811 }
 812
 813 int jt_dbg_mark_debug_buf(int argc, char **argv)
 814 {
 815         static char scratch[MAX_MARK_SIZE] = { '\0' };
 816         int rc, max_size = MAX_MARK_SIZE-1;
 817         struct libcfs_ioctl_data data = { 0 };
 818         char *text;
 819         time_t now = time(NULL);
 820
 821         if (argc > 1) {
 822                 int count;
 823                 text = scratch;
 824                 strncpy(text, argv[1], max_size);
 825                 max_size-=strlen(argv[1]);
 826                 for (count = 2; (count < argc) && (max_size > 0); count++){
 827                         strncat(text, " ", max_size);
 828                         max_size -= 1;
 829                         strncat(text, argv[count], max_size);
 830                         max_size -= strlen(argv[count]);
 831                 }
 832         } else {
 833                 text = ctime(&now);
 834         }
 835
 836         data.ioc_inllen1 = strlen(text) + 1;
 837         data.ioc_inlbuf1 = text;
 838         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
 839                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
 840                 return -1;
 841         }
 842
 843         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_MARK_DEBUG, buf);
 844         if (rc) {
 845                 fprintf(stderr, "IOC_LIBCFS_MARK_DEBUG failed: %s\n",
 846                         strerror(errno));
 847                 return -1;
 848         }
 849         return 0;
 850 }
 851
 852 static struct mod_paths {
 853         char *name, *path;
 854 } mod_paths[] = {
 855         {"libcfs", "lnet/libcfs"},
 856         {"lnet", "lnet/lnet"},
 857         {"kciblnd", "lnet/klnds/ciblnd"},
 858         {"kgmlnd", "lnet/klnds/gmlnd"},
 859         {"kmxlnd", "lnet/klnds/mxlnd"},
 860         {"kiiblnd", "lnet/klnds/iiblnd"},
 861         {"ko2iblnd", "lnet/klnds/o2iblnd"},
 862         {"kopeniblnd", "lnet/klnds/openiblnd"},
 863         {"kptllnd", "lnet/klnds/ptllnd"},
 864         {"kqswlnd", "lnet/klnds/qswlnd"},
 865         {"kralnd", "lnet/klnds/ralnd"},
 866         {"ksocklnd", "lnet/klnds/socklnd"},
 867         {"ktdilnd", "lnet/klnds/tdilnd"},
 868         {"kviblnd", "lnet/klnds/viblnd"},
 869         {"lvfs", "lustre/lvfs"},
 870         {"obdclass", "lustre/obdclass"},
 871         {"llog_test", "lustre/obdclass"},
 872         {"ptlrpc_gss", "lustre/ptlrpc/gss"},
 873         {"ptlrpc", "lustre/ptlrpc"},
 874         {"gks", "lustre/sec/gks"},
 875         {"gkc", "lustre/sec/gks"},
 876         {"ost", "lustre/ost"},
 877         {"osc", "lustre/osc"},
 878         {"mds", "lustre/mds"},
 879         {"mdc", "lustre/mdc"},
 880         {"llite", "lustre/llite"},
 881         {"lustre", "lustre/llite"},
 882         {"llite_lloop", "lustre/llite"},
 883         {"ldiskfs", "ldiskfs/ldiskfs"},
 884         {"smfs", "lustre/smfs"},
 885         {"obdecho", "lustre/obdecho"},
 886         {"ldlm", "lustre/ldlm"},
 887         {"obdfilter", "lustre/obdfilter"},
 888         {"lov", "lustre/lov"},
 889         {"lmv", "lustre/lmv"},
 890         {"fsfilt_ext3", "lustre/lvfs"},
 891         {"fsfilt_reiserfs", "lustre/lvfs"},
 892         {"fsfilt_smfs", "lustre/lvfs"},
 893         {"fsfilt_ldiskfs", "lustre/lvfs"},
 894         {"mds_ext3", "lustre/mds"},
 895         {"cobd", "lustre/cobd"},
 896         {"cmobd", "lustre/cmobd"},
 897         {"lquota", "lustre/quota"},
 898         {"mgs", "lustre/mgs"},
 899         {"mgc", "lustre/mgc"},
 900         {"mdt", "lustre/mdt"},
 901         {"mdd", "lustre/mdd"},
 902         {"osd", "lustre/osd"},
 903         {"cmm", "lustre/cmm"},
 904         {"fid", "lustre/fid"},
 905         {"fld", "lustre/fld"},
 906         {NULL, NULL}
 907 };
 908
 909 static int jt_dbg_modules_2_4(int argc, char **argv)
 910 {
 911 #ifdef HAVE_LINUX_VERSION_H
 912 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 913         struct mod_paths *mp;
 914         char *path = "";
 915         char *kernel = "linux";
 916
 917         if (argc >= 2)
 918                 path = argv[1];
 919         if (argc == 3)
 920                 kernel = argv[2];
 921         if (argc > 3) {
 922                 printf("%s [path] [kernel]\n", argv[0]);
 923                 return 0;
 924         }
 925
 926         for (mp = mod_paths; mp->name != NULL; mp++) {
 927                 struct module_info info;
 928                 int rc;
 929                 size_t crap;
 930                 int query_module(const char *name, int which, void *buf,
 931                                  size_t bufsize, size_t *ret);
 932
 933                 rc = query_module(mp->name, QM_INFO, &info, sizeof(info),
 934                                   &crap);
 935                 if (rc < 0) {
 936                         if (errno != ENOENT)
 937                                 printf("query_module(%s) failed: %s\n",
 938                                        mp->name, strerror(errno));
 939                 } else {
 940                         printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n", path,
 941                                path[0] ? "/" : "", mp->path, mp->name,
 942                                info.addr + sizeof(struct module));
 943                 }
 944         }
 945
 946         return 0;
 947 #endif // Headers are 2.6-only
 948 #endif // !HAVE_LINUX_VERSION_H
 949         return -EINVAL;
 950 }
 951
 952 static int jt_dbg_modules_2_5(int argc, char **argv)
 953 {
 954         struct mod_paths *mp;
 955         char *path = "";
 956         char *kernel = "linux";
 957         const char *proc = "/proc/modules";
 958         char modname[128], buf[4096];
 959         long modaddr;
 960         FILE *file;
 961
 962         if (argc >= 2)
 963                 path = argv[1];
 964         if (argc == 3)
 965                 kernel = argv[2];
 966         if (argc > 3) {
 967                 printf("%s [path] [kernel]\n", argv[0]);
 968                 return 0;
 969         }
 970
 971         file = fopen(proc, "r");
 972         if (!file) {
 973                 printf("failed open %s: %s\n", proc, strerror(errno));
 974                 return 0;
 975         }
 976
 977         while (fgets(buf, sizeof(buf), file) != NULL) {
 978                 if (sscanf(buf, "%s %*s %*s %*s %*s %lx", modname, &modaddr) == 2) {
 979                         for (mp = mod_paths; mp->name != NULL; mp++) {
 980                                 if (!strcmp(mp->name, modname))
 981                                         break;
 982                         }
 983                         if (mp->name) {
 984                                 printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n",
 985                                        path, path[0] ? "/" : "",
 986                                        mp->path, mp->name, modaddr);
 987                         }
 988                 }
 989         }
 990
 991         fclose(file);
 992         return 0;
 993 }
 994
 995 int jt_dbg_modules(int argc, char **argv)
 996 {
 997         int rc = 0;
 998         struct utsname sysinfo;
 999
1000         rc = uname(&sysinfo);
1001         if (rc) {
1002                 printf("uname() failed: %s\n", strerror(errno));
1003                 return 0;
1004         }
1005
1006         if (sysinfo.release[2] > '4') {
1007                 return jt_dbg_modules_2_5(argc, argv);
1008         } else {
1009                 return jt_dbg_modules_2_4(argc, argv);
1010         }
1011
1012         return 0;
1013 }
1014
1015 int jt_dbg_panic(int argc, char **argv)
1016 {
1017         int rc;
1018         struct libcfs_ioctl_data data;
1019
1020         if (argc != 1) {
1021                 fprintf(stderr, "usage: %s\n", argv[0]);
1022                 return 0;
1023         }
1024
1025         memset(&data, 0, sizeof(data));
1026         if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
1027                 fprintf(stderr, "libcfs_ioctl_pack failed.\n");
1028                 return -1;
1029         }
1030
1031         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_PANIC, buf);
1032         if (rc) {
1033                 fprintf(stderr, "IOC_LIBCFS_PANIC failed: %s\n",
1034                         strerror(errno));
1035                 return -1;
1036         }
1037         return 0;
1038 }