usr.sbin/mfiutil/mfi_evt.c

   1 /*-
   2  * Copyright (c) 2008, 2009 Yahoo!, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The names of the authors may not be used to endorse or promote
  14  *    products derived from this software without specific prior written
  15  *    permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/usr.sbin/mfiutil/mfi_evt.c,v 1.6 2011/12/05 15:11:35 jhb Exp $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/errno.h>
  34 #include <err.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <strings.h>
  38 #include <time.h>
  39 #include <unistd.h>
  40 #include "mfiutil.h"
  41
  42 static int
  43 mfi_event_get_info(int fd, struct mfi_evt_log_state *info, uint8_t *statusp)
  44 {
  45
  46         return (mfi_dcmd_command(fd, MFI_DCMD_CTRL_EVENT_GETINFO, info,
  47             sizeof(struct mfi_evt_log_state), NULL, 0, statusp));
  48 }
  49
  50 static int
  51 mfi_get_events(int fd, struct mfi_evt_list *list, int num_events,
  52     union mfi_evt filter, uint32_t start_seq, uint8_t *statusp)
  53 {
  54         uint32_t mbox[2];
  55         size_t size;
  56
  57         mbox[0] = start_seq;
  58         mbox[1] = filter.word;
  59         size = sizeof(struct mfi_evt_list) + sizeof(struct mfi_evt_detail) *
  60             (num_events - 1);
  61         return (mfi_dcmd_command(fd, MFI_DCMD_CTRL_EVENT_GET, list, size,
  62             (uint8_t *)&mbox, sizeof(mbox), statusp));
  63 }
  64
  65 static int
  66 show_logstate(int ac, __unused char **av)
  67 {
  68         struct mfi_evt_log_state info;
  69         int error, fd;
  70
  71         if (ac != 1) {
  72                 warnx("show logstate: extra arguments");
  73                 return (EINVAL);
  74         }
  75
  76         fd = mfi_open(mfi_unit);
  77         if (fd < 0) {
  78                 error = errno;
  79                 warn("mfi_open");
  80                 return (error);
  81         }
  82
  83         if (mfi_event_get_info(fd, &info, NULL) < 0) {
  84                 error = errno;
  85                 warn("Failed to get event log info");
  86                 close(fd);
  87                 return (error);
  88         }
  89
  90         printf("mfi%d Event Log Sequence Numbers:\n", mfi_unit);
  91         printf("  Newest Seq #: %u\n", info.newest_seq_num);
  92         printf("  Oldest Seq #: %u\n", info.oldest_seq_num);
  93         printf("   Clear Seq #: %u\n", info.clear_seq_num);
  94         printf("Shutdown Seq #: %u\n", info.shutdown_seq_num);
  95         printf("    Boot Seq #: %u\n", info.boot_seq_num);
  96
  97         close(fd);
  98
  99         return (0);
 100 }
 101 MFI_COMMAND(show, logstate, show_logstate);
 102
 103 static int
 104 parse_seq(struct mfi_evt_log_state *info, char *arg, uint32_t *seq)
 105 {
 106         char *cp;
 107         long val;
 108
 109         if (strcasecmp(arg, "newest") == 0) {
 110                 *seq = info->newest_seq_num;
 111                 return (0);
 112         }
 113         if (strcasecmp(arg, "oldest") == 0) {
 114                 *seq = info->oldest_seq_num;
 115                 return (0);
 116         }
 117         if (strcasecmp(arg, "clear") == 0) {
 118                 *seq = info->clear_seq_num;
 119                 return (0);
 120         }
 121         if (strcasecmp(arg, "shutdown") == 0) {
 122                 *seq = info->shutdown_seq_num;
 123                 return (0);
 124         }
 125         if (strcasecmp(arg, "boot") == 0) {
 126                 *seq = info->boot_seq_num;
 127                 return (0);
 128         }
 129         val = strtol(arg, &cp, 0);
 130         if (*cp != '\0' || val < 0) {
 131                 errno = EINVAL;
 132                 return (-1);
 133         }
 134         *seq = val;
 135         return (0);
 136 }
 137
 138 static int
 139 parse_locale(char *arg, uint16_t *locale)
 140 {
 141         char *cp;
 142         long val;
 143
 144         if (strncasecmp(arg, "vol", 3) == 0 || strcasecmp(arg, "ld") == 0) {
 145                 *locale = MFI_EVT_LOCALE_LD;
 146                 return (0);
 147         }
 148         if (strncasecmp(arg, "drive", 5) == 0 || strcasecmp(arg, "pd") == 0) {
 149                 *locale = MFI_EVT_LOCALE_PD;
 150                 return (0);
 151         }
 152         if (strncasecmp(arg, "encl", 4) == 0) {
 153                 *locale = MFI_EVT_LOCALE_ENCL;
 154                 return (0);
 155         }
 156         if (strncasecmp(arg, "batt", 4) == 0 ||
 157             strncasecmp(arg, "bbu", 3) == 0) {
 158                 *locale = MFI_EVT_LOCALE_BBU;
 159                 return (0);
 160         }
 161         if (strcasecmp(arg, "sas") == 0) {
 162                 *locale = MFI_EVT_LOCALE_SAS;
 163                 return (0);
 164         }
 165         if (strcasecmp(arg, "ctrl") == 0 || strncasecmp(arg, "cont", 4) == 0) {
 166                 *locale = MFI_EVT_LOCALE_CTRL;
 167                 return (0);
 168         }
 169         if (strcasecmp(arg, "config") == 0) {
 170                 *locale = MFI_EVT_LOCALE_CONFIG;
 171                 return (0);
 172         }
 173         if (strcasecmp(arg, "cluster") == 0) {
 174                 *locale = MFI_EVT_LOCALE_CLUSTER;
 175                 return (0);
 176         }
 177         if (strcasecmp(arg, "all") == 0) {
 178                 *locale = MFI_EVT_LOCALE_ALL;
 179                 return (0);
 180         }
 181         val = strtol(arg, &cp, 0);
 182         if (*cp != '\0' || val < 0 || val > 0xffff) {
 183                 errno = EINVAL;
 184                 return (-1);
 185         }
 186         *locale = val;
 187         return (0);
 188 }
 189
 190 static int
 191 parse_class(char *arg, int8_t *class)
 192 {
 193         char *cp;
 194         long val;
 195
 196         if (strcasecmp(arg, "debug") == 0) {
 197                 *class = MFI_EVT_CLASS_DEBUG;
 198                 return (0);
 199         }
 200         if (strncasecmp(arg, "prog", 4) == 0) {
 201                 *class = MFI_EVT_CLASS_PROGRESS;
 202                 return (0);
 203         }
 204         if (strncasecmp(arg, "info", 4) == 0) {
 205                 *class = MFI_EVT_CLASS_INFO;
 206                 return (0);
 207         }
 208         if (strncasecmp(arg, "warn", 4) == 0) {
 209                 *class = MFI_EVT_CLASS_WARNING;
 210                 return (0);
 211         }
 212         if (strncasecmp(arg, "crit", 4) == 0) {
 213                 *class = MFI_EVT_CLASS_CRITICAL;
 214                 return (0);
 215         }
 216         if (strcasecmp(arg, "fatal") == 0) {
 217                 *class = MFI_EVT_CLASS_FATAL;
 218                 return (0);
 219         }
 220         if (strcasecmp(arg, "dead") == 0) {
 221                 *class = MFI_EVT_CLASS_DEAD;
 222                 return (0);
 223         }
 224         val = strtol(arg, &cp, 0);
 225         if (*cp != '\0' || val < -128 || val > 127) {
 226                 errno = EINVAL;
 227                 return (-1);
 228         }
 229         *class = val;
 230         return (0);
 231 }
 232
 233 /*
 234  * The timestamp is the number of seconds since 00:00 Jan 1, 2000.  If
 235  * the bits in 24-31 are all set, then it is the number of seconds since
 236  * boot.
 237  */
 238 static const char *
 239 format_timestamp(uint32_t timestamp)
 240 {
 241         static char buffer[32];
 242         static time_t base;
 243         time_t t;
 244         struct tm tm;
 245
 246         if ((timestamp & 0xff000000) == 0xff000000) {
 247                 snprintf(buffer, sizeof(buffer), "boot + %us", timestamp &
 248                     0x00ffffff);
 249                 return (buffer);
 250         }
 251
 252         if (base == 0) {
 253                 /* Compute 00:00 Jan 1, 2000 offset. */
 254                 bzero(&tm, sizeof(tm));
 255                 tm.tm_mday = 1;
 256                 tm.tm_year = (2000 - 1900);
 257                 base = mktime(&tm);
 258         }
 259         if (base == -1) {
 260                 snprintf(buffer, sizeof(buffer), "%us", timestamp);
 261                 return (buffer);
 262         }
 263         t = base + timestamp;
 264         strftime(buffer, sizeof(buffer), "%+", localtime(&t));
 265         return (buffer);
 266 }
 267
 268 static const char *
 269 format_locale(uint16_t locale)
 270 {
 271         static char buffer[8];
 272
 273         switch (locale) {
 274         case MFI_EVT_LOCALE_LD:
 275                 return ("VOLUME");
 276         case MFI_EVT_LOCALE_PD:
 277                 return ("DRIVE");
 278         case MFI_EVT_LOCALE_ENCL:
 279                 return ("ENCL");
 280         case MFI_EVT_LOCALE_BBU:
 281                 return ("BATTERY");
 282         case MFI_EVT_LOCALE_SAS:
 283                 return ("SAS");
 284         case MFI_EVT_LOCALE_CTRL:
 285                 return ("CTRL");
 286         case MFI_EVT_LOCALE_CONFIG:
 287                 return ("CONFIG");
 288         case MFI_EVT_LOCALE_CLUSTER:
 289                 return ("CLUSTER");
 290         case MFI_EVT_LOCALE_ALL:
 291                 return ("ALL");
 292         default:
 293                 snprintf(buffer, sizeof(buffer), "0x%04x", locale);
 294                 return (buffer);
 295         }
 296 }
 297
 298 static const char *
 299 format_class(int8_t class)
 300 {
 301         static char buffer[6];
 302
 303         switch (class) {
 304         case MFI_EVT_CLASS_DEBUG:
 305                 return ("debug");
 306         case MFI_EVT_CLASS_PROGRESS:
 307                 return ("progress");
 308         case MFI_EVT_CLASS_INFO:
 309                 return ("info");
 310         case MFI_EVT_CLASS_WARNING:
 311                 return ("WARN");
 312         case MFI_EVT_CLASS_CRITICAL:
 313                 return ("CRIT");
 314         case MFI_EVT_CLASS_FATAL:
 315                 return ("FATAL");
 316         case MFI_EVT_CLASS_DEAD:
 317                 return ("DEAD");
 318         default:
 319                 snprintf(buffer, sizeof(buffer), "%d", class);
 320                 return (buffer);
 321         }
 322 }
 323
 324 static void
 325 simple_hex(void *ptr, size_t length, const char *separator)
 326 {
 327         unsigned char *cp;
 328         u_int i;
 329
 330         if (length == 0)
 331                 return;
 332         cp = ptr;
 333         printf("%02x", cp[0]);
 334         for (i = 1; i < length; i++)
 335                 printf("%s%02x", separator, cp[i]);
 336 }
 337
 338 static const char *
 339 pdrive_location(struct mfi_evt_pd *pd)
 340 {
 341         static char buffer[16];
 342
 343         if (pd->enclosure_index == 0)
 344                 snprintf(buffer, sizeof(buffer), "%02d(s%d)", pd->device_id,
 345                     pd->slot_number);
 346         else
 347                 snprintf(buffer, sizeof(buffer), "%02d(e%d/s%d)", pd->device_id,
 348                     pd->enclosure_index, pd->slot_number);
 349         return (buffer);
 350 }
 351
 352 static const char *
 353 volume_name(int fd, struct mfi_evt_ld *ld)
 354 {
 355
 356         return (mfi_volume_name(fd, ld->target_id));
 357 }
 358
 359 /* Ripped from sys/dev/mfi/mfi.c. */
 360 static void
 361 mfi_decode_evt(int fd, struct mfi_evt_detail *detail, int verbose)
 362 {
 363
 364         printf("%5d (%s/%s/%s) - ", detail->seq, format_timestamp(detail->time),
 365             format_locale(detail->evt_class.members.locale),
 366             format_class(detail->evt_class.members.evt_class));
 367         switch (detail->arg_type) {
 368         case MR_EVT_ARGS_NONE:
 369                 break;
 370         case MR_EVT_ARGS_CDB_SENSE:
 371                 if (verbose) {
 372                         printf("PD %s CDB ",
 373                             pdrive_location(&detail->args.cdb_sense.pd)
 374                             );
 375                         simple_hex(detail->args.cdb_sense.cdb,
 376                             detail->args.cdb_sense.cdb_len, ":");
 377                         printf(" Sense ");
 378                         simple_hex(detail->args.cdb_sense.sense,
 379                             detail->args.cdb_sense.sense_len, ":");
 380                         printf(":\n ");
 381                 }
 382                 break;
 383         case MR_EVT_ARGS_LD:
 384                 printf("VOL %s event: ", volume_name(fd, &detail->args.ld));
 385                 break;
 386         case MR_EVT_ARGS_LD_COUNT:
 387                 printf("VOL %s", volume_name(fd, &detail->args.ld_count.ld));
 388                 if (verbose) {
 389                         printf(" count %lld: ",
 390                             (long long)detail->args.ld_count.count);
 391                 }
 392                 printf(": ");
 393                 break;
 394         case MR_EVT_ARGS_LD_LBA:
 395                 printf("VOL %s", volume_name(fd, &detail->args.ld_count.ld));
 396                 if (verbose) {
 397                         printf(" lba %lld",
 398                             (long long)detail->args.ld_lba.lba);
 399                 }
 400                 printf(": ");
 401                 break;
 402         case MR_EVT_ARGS_LD_OWNER:
 403                 printf("VOL %s", volume_name(fd, &detail->args.ld_count.ld));
 404                 if (verbose) {
 405                         printf(" owner changed: prior %d, new %d",
 406                             detail->args.ld_owner.pre_owner,
 407                             detail->args.ld_owner.new_owner);
 408                 }
 409                 printf(": ");
 410                 break;
 411         case MR_EVT_ARGS_LD_LBA_PD_LBA:
 412                 printf("VOL %s", volume_name(fd, &detail->args.ld_count.ld));
 413                 if (verbose) {
 414                         printf(" lba %lld, physical drive PD %s lba %lld",
 415                             (long long)detail->args.ld_lba_pd_lba.ld_lba,
 416                             pdrive_location(&detail->args.ld_lba_pd_lba.pd),
 417                             (long long)detail->args.ld_lba_pd_lba.pd_lba);
 418                 }
 419                 printf(": ");
 420                 break;
 421         case MR_EVT_ARGS_LD_PROG:
 422                 printf("VOL %s", volume_name(fd, &detail->args.ld_prog.ld));
 423                 if (verbose) {
 424                         printf(" progress %d%% in %ds",
 425                             detail->args.ld_prog.prog.progress/655,
 426                             detail->args.ld_prog.prog.elapsed_seconds);
 427                 }
 428                 printf(": ");
 429                 break;
 430         case MR_EVT_ARGS_LD_STATE:
 431                 printf("VOL %s", volume_name(fd, &detail->args.ld_prog.ld));
 432                 if (verbose) {
 433                         printf(" state prior %s new %s",
 434                             mfi_ldstate(detail->args.ld_state.prev_state),
 435                             mfi_ldstate(detail->args.ld_state.new_state));
 436                 }
 437                 printf(": ");
 438                 break;
 439         case MR_EVT_ARGS_LD_STRIP:
 440                 printf("VOL %s", volume_name(fd, &detail->args.ld_strip.ld));
 441                 if (verbose) {
 442                         printf(" strip %lld",
 443                             (long long)detail->args.ld_strip.strip);
 444                 }
 445                 printf(": ");
 446                 break;
 447         case MR_EVT_ARGS_PD:
 448                 if (verbose) {
 449                         printf("PD %s event: ",
 450                             pdrive_location(&detail->args.pd));
 451                 }
 452                 break;
 453         case MR_EVT_ARGS_PD_ERR:
 454                 if (verbose) {
 455                         printf("PD %s err %d: ",
 456                             pdrive_location(&detail->args.pd_err.pd),
 457                             detail->args.pd_err.err);
 458                 }
 459                 break;
 460         case MR_EVT_ARGS_PD_LBA:
 461                 if (verbose) {
 462                         printf("PD %s lba %lld: ",
 463                             pdrive_location(&detail->args.pd_lba.pd),
 464                             (long long)detail->args.pd_lba.lba);
 465                 }
 466                 break;
 467         case MR_EVT_ARGS_PD_LBA_LD:
 468                 if (verbose) {
 469                         printf("PD %s lba %lld VOL %s: ",
 470                             pdrive_location(&detail->args.pd_lba_ld.pd),
 471                             (long long)detail->args.pd_lba.lba,
 472                             volume_name(fd, &detail->args.pd_lba_ld.ld));
 473                 }
 474                 break;
 475         case MR_EVT_ARGS_PD_PROG:
 476                 if (verbose) {
 477                         printf("PD %s progress %d%% seconds %ds: ",
 478                             pdrive_location(&detail->args.pd_prog.pd),
 479                             detail->args.pd_prog.prog.progress/655,
 480                             detail->args.pd_prog.prog.elapsed_seconds);
 481                 }
 482                 break;
 483         case MR_EVT_ARGS_PD_STATE:
 484                 if (verbose) {
 485                         printf("PD %s state prior %s new %s: ",
 486                             pdrive_location(&detail->args.pd_prog.pd),
 487                             mfi_pdstate(detail->args.pd_state.prev_state),
 488                             mfi_pdstate(detail->args.pd_state.new_state));
 489                 }
 490                 break;
 491         case MR_EVT_ARGS_PCI:
 492                 if (verbose) {
 493                         printf("PCI 0x%04x 0x%04x 0x%04x 0x%04x: ",
 494                             detail->args.pci.venderId,
 495                             detail->args.pci.deviceId,
 496                             detail->args.pci.subVenderId,
 497                             detail->args.pci.subDeviceId);
 498                 }
 499                 break;
 500         case MR_EVT_ARGS_RATE:
 501                 if (verbose) {
 502                         printf("Rebuild rate %d: ", detail->args.rate);
 503                 }
 504                 break;
 505         case MR_EVT_ARGS_TIME:
 506                 if (verbose) {
 507                         printf("Adapter time %s; %d seconds since power on: ",
 508                             format_timestamp(detail->args.time.rtc),
 509                             detail->args.time.elapsedSeconds);
 510                 }
 511                 break;
 512         case MR_EVT_ARGS_ECC:
 513                 if (verbose) {
 514                         printf("Adapter ECC %x,%x: %s: ",
 515                             detail->args.ecc.ecar,
 516                             detail->args.ecc.elog,
 517                             detail->args.ecc.str);
 518                 }
 519                 break;
 520         default:
 521                 if (verbose) {
 522                         printf("Type %d: ", detail->arg_type);
 523                 }
 524                 break;
 525         }
 526         printf("%s\n", detail->description);
 527 }
 528
 529 static int
 530 show_events(int ac, char **av)
 531 {
 532         struct mfi_evt_log_state info;
 533         struct mfi_evt_list *list;
 534         union mfi_evt filter;
 535         long val;
 536         char *cp;
 537         ssize_t size;
 538         uint32_t seq, start, stop;
 539         uint8_t status;
 540         int ch, error, fd, num_events, verbose;
 541         u_int i;
 542
 543         fd = mfi_open(mfi_unit);
 544         if (fd < 0) {
 545                 error = errno;
 546                 warn("mfi_open");
 547                 return (error);
 548         }
 549
 550         if (mfi_event_get_info(fd, &info, NULL) < 0) {
 551                 error = errno;
 552                 warn("Failed to get event log info");
 553                 close(fd);
 554                 return (error);
 555         }
 556
 557         /* Default settings. */
 558         num_events = 15;
 559         filter.members.reserved = 0;
 560         filter.members.locale = MFI_EVT_LOCALE_ALL;
 561         filter.members.evt_class = MFI_EVT_CLASS_WARNING;
 562         start = info.boot_seq_num;
 563         stop = info.newest_seq_num;
 564         verbose = 0;
 565
 566         /* Parse any options. */
 567         optind = 1;
 568         while ((ch = getopt(ac, av, "c:l:n:v")) != -1) {
 569                 switch (ch) {
 570                 case 'c':
 571                         if (parse_class(optarg, &filter.members.evt_class) < 0) {
 572                                 error = errno;
 573                                 warn("Error parsing event class");
 574                                 close(fd);
 575                                 return (error);
 576                         }
 577                         break;
 578                 case 'l':
 579                         if (parse_locale(optarg, &filter.members.locale) < 0) {
 580                                 error = errno;
 581                                 warn("Error parsing event locale");
 582                                 close(fd);
 583                                 return (error);
 584                         }
 585                         break;
 586                 case 'n':
 587                         val = strtol(optarg, &cp, 0);
 588                         if (*cp != '\0' || val <= 0) {
 589                                 warnx("Invalid event count");
 590                                 close(fd);
 591                                 return (EINVAL);
 592                         }
 593                         num_events = val;
 594                         break;
 595                 case 'v':
 596                         verbose = 1;
 597                         break;
 598                 case '?':
 599                 default:
 600                         close(fd);
 601                         return (EINVAL);
 602                 }
 603         }
 604         ac -= optind;
 605         av += optind;
 606
 607         /* Determine buffer size and validate it. */
 608         size = sizeof(struct mfi_evt_list) + sizeof(struct mfi_evt_detail) *
 609             (num_events - 1);
 610         if (size > getpagesize()) {
 611                 warnx("Event count is too high");
 612                 close(fd);
 613                 return (EINVAL);
 614         }
 615
 616         /* Handle optional start and stop sequence numbers. */
 617         if (ac > 2) {
 618                 warnx("show events: extra arguments");
 619                 close(fd);
 620                 return (EINVAL);
 621         }
 622         if (ac > 0 && parse_seq(&info, av[0], &start) < 0) {
 623                 error = errno;
 624                 warn("Error parsing starting sequence number");
 625                 close(fd);
 626                 return (error);
 627         }
 628         if (ac > 1 && parse_seq(&info, av[1], &stop) < 0) {
 629                 error = errno;
 630                 warn("Error parsing ending sequence number");
 631                 close(fd);
 632                 return (error);
 633         }
 634
 635         list = malloc(size);
 636         if (list == NULL) {
 637                 warnx("malloc failed");
 638                 close(fd);
 639                 return (ENOMEM);
 640         }
 641         for (seq = start;;) {
 642                 if (mfi_get_events(fd, list, num_events, filter, seq,
 643                     &status) < 0) {
 644                         error = errno;
 645                         warn("Failed to fetch events");
 646                         free(list);
 647                         close(fd);
 648                         return (error);
 649                 }
 650                 if (status == MFI_STAT_NOT_FOUND) {
 651                         if (seq == start)
 652                                 warnx("No matching events found");
 653                         break;
 654                 }
 655                 if (status != MFI_STAT_OK) {
 656                         warnx("Error fetching events: %s", mfi_status(status));
 657                         free(list);
 658                         close(fd);
 659                         return (EIO);
 660                 }
 661
 662                 for (i = 0; i < list->count; i++) {
 663                         /*
 664                          * If this event is newer than 'stop_seq' then
 665                          * break out of the loop.  Note that the log
 666                          * is a circular buffer so we have to handle
 667                          * the case that our stop point is earlier in
 668                          * the buffer than our start point.
 669                          */
 670                         if (list->event[i].seq >= stop) {
 671                                 if (start <= stop)
 672                                         break;
 673                                 else if (list->event[i].seq < start)
 674                                         break;
 675                         }
 676                         mfi_decode_evt(fd, &list->event[i], verbose);
 677                 }
 678
 679                 /*
 680                  * XXX: If the event's seq # is the end of the buffer
 681                  * then this probably won't do the right thing.  We
 682                  * need to know the size of the buffer somehow.
 683                  */
 684                 seq = list->event[list->count - 1].seq + 1;
 685
 686         }
 687
 688         free(list);
 689         close(fd);
 690
 691         return (0);
 692 }
 693 MFI_COMMAND(show, events, show_events);