e2fsck/unix.c

   1 /*
   2  * unix.c - The unix-specific code for e2fsck
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
  13
  14 #include "config.h"
  15 #include <stdio.h>
  16 #ifdef HAVE_STDLIB_H
  17 #include <stdlib.h>
  18 #endif
  19 #include <string.h>
  20 #include <fcntl.h>
  21 #include <ctype.h>
  22 #include <time.h>
  23 #ifdef HAVE_SIGNAL_H
  24 #include <signal.h>
  25 #endif
  26 #ifdef HAVE_GETOPT_H
  27 #include <getopt.h>
  28 #else
  29 extern char *optarg;
  30 extern int optind;
  31 #endif
  32 #include <unistd.h>
  33 #ifdef HAVE_ERRNO_H
  34 #include <errno.h>
  35 #endif
  36 #ifdef HAVE_MNTENT_H
  37 #include <mntent.h>
  38 #endif
  39 #ifdef HAVE_SYS_IOCTL_H
  40 #include <sys/ioctl.h>
  41 #endif
  42 #ifdef HAVE_MALLOC_H
  43 #include <malloc.h>
  44 #endif
  45 #ifdef HAVE_SYS_TYPES_H
  46 #include <sys/types.h>
  47 #endif
  48 #ifdef HAVE_DIRENT_H
  49 #include <dirent.h>
  50 #endif
  51
  52 #include "e2p/e2p.h"
  53 #include "et/com_err.h"
  54 #include "e2p/e2p.h"
  55 #include "e2fsck.h"
  56 #include "problem.h"
  57 #include "../version.h"
  58
  59 /* Command line options */
  60 static int cflag;               /* check disk */
  61 static int show_version_only;
  62 static int verbose;
  63
  64 static int replace_bad_blocks;
  65 static int keep_bad_blocks;
  66 static char *bad_blocks_file;
  67
  68 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  69
  70 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jfs-debug */
  71 int journal_enable_debug = -1;
  72 #endif
  73
  74 static void usage(e2fsck_t ctx)
  75 {
  76         fprintf(stderr,
  77                 _("Usage: %s [-panyrcdfvtDFV] [-b superblock] [-B blocksize]\n"
  78                 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
  79                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  80                 "\t\t[-E extended-options] device\n"),
  81                 ctx->program_name);
  82
  83         fprintf(stderr, _("\nEmergency help:\n"
  84                 " -p                   Automatic repair (no questions)\n"
  85                 " -n                   Make no changes to the filesystem\n"
  86                 " -y                   Assume \"yes\" to all questions\n"
  87                 " -c                   Check for bad blocks and add them to the badblock list\n"
  88                 " -f                   Force checking even if filesystem is marked clean\n"));
  89         fprintf(stderr, _(""
  90                 " -v                   Be verbose\n"
  91                 " -b superblock        Use alternative superblock\n"
  92                 " -B blocksize         Force blocksize when looking for superblock\n"
  93                 " -j external_journal  Set location of the external journal\n"
  94                 " -l bad_blocks_file   Add to badblocks list\n"
  95                 " -L bad_blocks_file   Set badblocks list\n"
  96                 ));
  97
  98         exit(FSCK_USAGE);
  99 }
 100
 101 static void show_stats(e2fsck_t ctx)
 102 {
 103         ext2_filsys fs = ctx->fs;
 104         ext2_ino_t inodes, inodes_used;
 105         blk64_t blocks, blocks_used;
 106         unsigned int dir_links;
 107         unsigned int num_files, num_links;
 108         int frag_percent_file, frag_percent_dir, frag_percent_total;
 109         int i, j;
 110
 111         dir_links = 2 * ctx->fs_directory_count - 1;
 112         num_files = ctx->fs_total_count - dir_links;
 113         num_links = ctx->fs_links_count - dir_links;
 114         inodes = fs->super->s_inodes_count;
 115         inodes_used = (fs->super->s_inodes_count -
 116                        fs->super->s_free_inodes_count);
 117         blocks = ext2fs_blocks_count(fs->super);
 118         blocks_used = (ext2fs_blocks_count(fs->super) -
 119                        ext2fs_free_blocks_count(fs->super));
 120
 121         frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 122         frag_percent_file = (frag_percent_file + 5) / 10;
 123
 124         frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 125         frag_percent_dir = (frag_percent_dir + 5) / 10;
 126
 127         frag_percent_total = ((10000 * (ctx->fs_fragmented +
 128                                         ctx->fs_fragmented_dir))
 129                               / inodes_used);
 130         frag_percent_total = (frag_percent_total + 5) / 10;
 131
 132         if (!verbose) {
 133                 printf(_("%s: %u/%u files (%0d.%d%% non-contiguous), %llu/%llu blocks\n"),
 134                        ctx->device_name, inodes_used, inodes,
 135                        frag_percent_total / 10, frag_percent_total % 10,
 136                        blocks_used, blocks);
 137                 return;
 138         }
 139         printf (P_("\n%8u inode used (%2.2f%%)\n", "\n%8u inodes used (%2.2f%%)\n",
 140                    inodes_used), inodes_used, 100.0 * inodes_used / inodes);
 141         printf (P_("%8u non-contiguous file (%0d.%d%%)\n",
 142                    "%8u non-contiguous files (%0d.%d%%)\n",
 143                    ctx->fs_fragmented),
 144                 ctx->fs_fragmented, frag_percent_file / 10,
 145                 frag_percent_file % 10);
 146         printf (P_("%8u non-contiguous directory (%0d.%d%%)\n",
 147                    "%8u non-contiguous directories (%0d.%d%%)\n",
 148                    ctx->fs_fragmented_dir),
 149                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 150                 frag_percent_dir % 10);
 151         printf (_("         # of inodes with ind/dind/tind blocks: %u/%u/%u\n"),
 152                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 153
 154         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 155                 if (ctx->extent_depth_count[j])
 156                         break;
 157         if (++j) {
 158                 printf (_("         Extent depth histogram: "));
 159                 for (i=0; i < j; i++) {
 160                         if (i)
 161                                 fputc('/', stdout);
 162                         printf("%u", ctx->extent_depth_count[i]);
 163                 }
 164                 fputc('\n', stdout);
 165         }
 166
 167         printf (P_("%8llu block used (%2.2f%%)\n",
 168                    "%8llu blocks used (%2.2f%%)\n",
 169                    blocks_used), blocks_used, 100.0 * blocks_used / blocks);
 170         printf (P_("%8u bad block\n", "%8u bad blocks\n",
 171                    ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 172         printf (P_("%8u large file\n", "%8u large files\n",
 173                    ctx->large_files), ctx->large_files);
 174         printf (P_("\n%8u regular file\n", "\n%8u regular files\n",
 175                    ctx->fs_regular_count), ctx->fs_regular_count);
 176         printf (P_("%8u directory\n", "%8u directories\n",
 177                    ctx->fs_directory_count), ctx->fs_directory_count);
 178         printf (P_("%8u character device file\n",
 179                    "%8u character device files\n", ctx->fs_chardev_count),
 180                 ctx->fs_chardev_count);
 181         printf (P_("%8u block device file\n", "%8u block device files\n",
 182                    ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 183         printf (P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count),
 184                 ctx->fs_fifo_count);
 185         printf (P_("%8u link\n", "%8u links\n",
 186                    ctx->fs_links_count - dir_links),
 187                 ctx->fs_links_count - dir_links);
 188         printf (P_("%8u symbolic link", "%8u symbolic links",
 189                    ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 190         printf (P_(" (%u fast symbolic link)\n", " (%u fast symbolic links)\n",
 191                    ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
 192         printf (P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count),
 193                 ctx->fs_sockets_count);
 194         printf ("--------\n");
 195         printf (P_("%8u file\n", "%8u files\n",
 196                    ctx->fs_total_count - dir_links),
 197                 ctx->fs_total_count - dir_links);
 198 }
 199
 200 static void check_mount(e2fsck_t ctx)
 201 {
 202         errcode_t       retval;
 203         int             cont;
 204
 205         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 206                                          &ctx->mount_flags);
 207         if (retval) {
 208                 com_err("ext2fs_check_if_mount", retval,
 209                         _("while determining whether %s is mounted."),
 210                         ctx->filesystem_name);
 211                 return;
 212         }
 213
 214         /*
 215          * If the filesystem isn't mounted, or it's the root
 216          * filesystem and it's mounted read-only, and we're not doing
 217          * a read/write check, then everything's fine.
 218          */
 219         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 220             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 221              (ctx->mount_flags & EXT2_MF_READONLY) &&
 222              !(ctx->options & E2F_OPT_WRITECHECK)))
 223                 return;
 224
 225         if ((ctx->options & E2F_OPT_READONLY) &&
 226             !(ctx->options & E2F_OPT_WRITECHECK)) {
 227                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 228                 return;
 229         }
 230
 231         printf(_("%s is mounted.  "), ctx->filesystem_name);
 232         if (!ctx->interactive)
 233                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 234         printf(_("\n\n\007\007\007\007WARNING!!!  "
 235                "The filesystem is mounted.   If you continue you ***WILL***\n"
 236                "cause ***SEVERE*** filesystem damage.\007\007\007\n\n"));
 237         cont = ask_yn(_("Do you really want to continue"), 0);
 238         if (!cont) {
 239                 printf (_("check aborted.\n"));
 240                 exit (0);
 241         }
 242         return;
 243 }
 244
 245 static int is_on_batt(void)
 246 {
 247         FILE    *f;
 248         DIR     *d;
 249         char    tmp[80], tmp2[80], fname[80];
 250         unsigned int    acflag;
 251         struct dirent*  de;
 252
 253         f = fopen("/proc/apm", "r");
 254         if (f) {
 255                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 256                         acflag = 1;
 257                 fclose(f);
 258                 return (acflag != 1);
 259         }
 260         d = opendir("/proc/acpi/ac_adapter");
 261         if (d) {
 262                 while ((de=readdir(d)) != NULL) {
 263                         if (!strncmp(".", de->d_name, 1))
 264                                 continue;
 265                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 266                                  de->d_name);
 267                         f = fopen(fname, "r");
 268                         if (!f)
 269                                 continue;
 270                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 271                                 tmp[0] = 0;
 272                         fclose(f);
 273                         if (strncmp(tmp, "off-line", 8) == 0) {
 274                                 closedir(d);
 275                                 return 1;
 276                         }
 277                 }
 278                 closedir(d);
 279         }
 280         return 0;
 281 }
 282
 283 /*
 284  * This routine checks to see if a filesystem can be skipped; if so,
 285  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 286  * message explaining why a check is being forced.
 287  */
 288 static void check_if_skip(e2fsck_t ctx)
 289 {
 290         ext2_filsys fs = ctx->fs;
 291         struct problem_context pctx;
 292         const char *reason = NULL;
 293         unsigned int reason_arg = 0;
 294         long next_check;
 295         int batt = is_on_batt();
 296         int defer_check_on_battery;
 297         int broken_system_clock;
 298         time_t lastcheck;
 299
 300         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 301                             0, 0, &broken_system_clock);
 302         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 303                 broken_system_clock = 1;
 304         profile_get_boolean(ctx->profile, "options",
 305                             "defer_check_on_battery", 0, 1,
 306                             &defer_check_on_battery);
 307         if (!defer_check_on_battery)
 308                 batt = 0;
 309
 310         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 311                 return;
 312
 313         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 314                 goto skip;
 315
 316         lastcheck = fs->super->s_lastcheck;
 317         if (lastcheck > ctx->now)
 318                 lastcheck -= ctx->time_fudge;
 319         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 320             !ext2fs_test_valid(fs))
 321                 reason = _(" contains a file system with errors");
 322         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 323                 reason = _(" was not cleanly unmounted");
 324         else if (check_backup_super_block(ctx))
 325                 reason = _(" primary superblock features different from backup");
 326         else if ((fs->super->s_max_mnt_count > 0) &&
 327                  (fs->super->s_mnt_count >=
 328                   (unsigned) fs->super->s_max_mnt_count)) {
 329                 reason = _(" has been mounted %u times without being checked");
 330                 reason_arg = fs->super->s_mnt_count;
 331                 if (batt && (fs->super->s_mnt_count <
 332                              (unsigned) fs->super->s_max_mnt_count*2))
 333                         reason = 0;
 334         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 335                    (ctx->now < lastcheck)) {
 336                 reason = _(" has filesystem last checked time in the future");
 337                 if (batt)
 338                         reason = 0;
 339         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 340                    ((ctx->now - lastcheck) >=
 341                     ((time_t) fs->super->s_checkinterval))) {
 342                 reason = _(" has gone %u days without being checked");
 343                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 344                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 345                              fs->super->s_checkinterval*2))
 346                         reason = 0;
 347         }
 348         if (reason) {
 349                 fputs(ctx->device_name, stdout);
 350                 printf(reason, reason_arg);
 351                 fputs(_(", check forced.\n"), stdout);
 352                 return;
 353         }
 354
 355         /*
 356          * Update the global counts from the block group counts.  This
 357          * is needed since modern kernels don't update the global
 358          * counts so as to avoid locking the entire file system.  So
 359          * if the filesystem is not unmounted cleanly, the global
 360          * counts may not be accurate.  Update them here if we can,
 361          * for the benefit of users who might examine the file system
 362          * using dumpe2fs.  (This is for cosmetic reasons only.)
 363          */
 364         clear_problem_context(&pctx);
 365         pctx.ino = fs->super->s_free_inodes_count;
 366         pctx.ino2 = ctx->free_inodes;
 367         if ((pctx.ino != pctx.ino2) &&
 368             !(ctx->options & E2F_OPT_READONLY) &&
 369             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 370                 fs->super->s_free_inodes_count = ctx->free_inodes;
 371                 ext2fs_mark_super_dirty(fs);
 372         }
 373         clear_problem_context(&pctx);
 374         pctx.blk = ext2fs_free_blocks_count(fs->super);
 375         pctx.blk2 = ctx->free_blocks;
 376         if ((pctx.blk != pctx.blk2) &&
 377             !(ctx->options & E2F_OPT_READONLY) &&
 378             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 379                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 380                 ext2fs_mark_super_dirty(fs);
 381         }
 382
 383         /* Print the summary message when we're skipping a full check */
 384         printf(_("%s: clean, %u/%u files, %llu/%llu blocks"), ctx->device_name,
 385                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 386                fs->super->s_inodes_count,
 387                ext2fs_blocks_count(fs->super) -
 388                ext2fs_free_blocks_count(fs->super),
 389                ext2fs_blocks_count(fs->super));
 390         next_check = 100000;
 391         if (fs->super->s_max_mnt_count > 0) {
 392                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 393                 if (next_check <= 0)
 394                         next_check = 1;
 395         }
 396         if (!broken_system_clock && fs->super->s_checkinterval &&
 397             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 398                 next_check = 1;
 399         if (next_check <= 5) {
 400                 if (next_check == 1) {
 401                         if (batt)
 402                                 fputs(_(" (check deferred; on battery)"),
 403                                       stdout);
 404                         else
 405                                 fputs(_(" (check after next mount)"), stdout);
 406                 } else
 407                         printf(_(" (check in %ld mounts)"), next_check);
 408         }
 409         fputc('\n', stdout);
 410 skip:
 411         ext2fs_close(fs);
 412         ctx->fs = NULL;
 413         e2fsck_free_context(ctx);
 414         exit(FSCK_OK);
 415 }
 416
 417 /*
 418  * For completion notice
 419  */
 420 struct percent_tbl {
 421         int     max_pass;
 422         int     table[32];
 423 };
 424 struct percent_tbl e2fsck_tbl = {
 425         5, { 0, 70, 90, 92,  95, 100 }
 426 };
 427 static char bar[128], spaces[128];
 428
 429 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 430                           int max)
 431 {
 432         float   percent;
 433
 434         if (pass <= 0)
 435                 return 0.0;
 436         if (pass > tbl->max_pass || max == 0)
 437                 return 100.0;
 438         percent = ((float) curr) / ((float) max);
 439         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 440                 + tbl->table[pass-1]);
 441 }
 442
 443 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 444 {
 445         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 446                 return;
 447
 448         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 449                ctx->stop_meta);
 450         fflush(stdout);
 451         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 452 }
 453
 454 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 455                            unsigned int dpynum)
 456 {
 457         static const char spinner[] = "\\|/-";
 458         int     i;
 459         unsigned int    tick;
 460         struct timeval  tv;
 461         int dpywidth;
 462         int fixed_percent;
 463
 464         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 465                 return 0;
 466
 467         /*
 468          * Calculate the new progress position.  If the
 469          * percentage hasn't changed, then we skip out right
 470          * away.
 471          */
 472         fixed_percent = (int) ((10 * percent) + 0.5);
 473         if (ctx->progress_last_percent == fixed_percent)
 474                 return 0;
 475         ctx->progress_last_percent = fixed_percent;
 476
 477         /*
 478          * If we've already updated the spinner once within
 479          * the last 1/8th of a second, no point doing it
 480          * again.
 481          */
 482         gettimeofday(&tv, NULL);
 483         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 484         if ((tick == ctx->progress_last_time) &&
 485             (fixed_percent != 0) && (fixed_percent != 1000))
 486                 return 0;
 487         ctx->progress_last_time = tick;
 488
 489         /*
 490          * Advance the spinner, and note that the progress bar
 491          * will be on the screen
 492          */
 493         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 494         ctx->flags |= E2F_FLAG_PROG_BAR;
 495
 496         dpywidth = 66 - strlen(label);
 497         dpywidth = 8 * (dpywidth / 8);
 498         if (dpynum)
 499                 dpywidth -= 8;
 500
 501         i = ((percent * dpywidth) + 50) / 100;
 502         printf("%s%s: |%s%s", ctx->start_meta, label,
 503                bar + (sizeof(bar) - (i+1)),
 504                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 505         if (fixed_percent == 1000)
 506                 fputc('|', stdout);
 507         else
 508                 fputc(spinner[ctx->progress_pos & 3], stdout);
 509         printf(" %4.1f%%  ", percent);
 510         if (dpynum)
 511                 printf("%u\r", dpynum);
 512         else
 513                 fputs(" \r", stdout);
 514         fputs(ctx->stop_meta, stdout);
 515
 516         if (fixed_percent == 1000)
 517                 e2fsck_clear_progbar(ctx);
 518         fflush(stdout);
 519
 520         return 0;
 521 }
 522
 523 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 524                                   unsigned long cur, unsigned long max)
 525 {
 526         char buf[1024];
 527         float percent;
 528
 529         if (pass == 0)
 530                 return 0;
 531
 532         if (ctx->progress_fd) {
 533                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 534                          pass, cur, max, ctx->device_name);
 535                 write_all(ctx->progress_fd, buf, strlen(buf));
 536         } else {
 537                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 538                 e2fsck_simple_progress(ctx, ctx->device_name,
 539                                        percent, 0);
 540         }
 541         return 0;
 542 }
 543
 544 #define PATH_SET "PATH=/sbin"
 545
 546 /*
 547  * Make sure 0,1,2 file descriptors are open, so that we don't open
 548  * the filesystem using the same file descriptor as stdout or stderr.
 549  */
 550 static void reserve_stdio_fds(void)
 551 {
 552         int     fd = 0;
 553
 554         while (fd <= 2) {
 555                 fd = open("/dev/null", O_RDWR);
 556                 if (fd < 0) {
 557                         fprintf(stderr, _("ERROR: Couldn't open "
 558                                 "/dev/null (%s)\n"),
 559                                 strerror(errno));
 560                         break;
 561                 }
 562         }
 563 }
 564
 565 #ifdef HAVE_SIGNAL_H
 566 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 567 {
 568         e2fsck_t ctx = e2fsck_global_ctx;
 569
 570         if (!ctx)
 571                 return;
 572
 573         ctx->progress = e2fsck_update_progress;
 574 }
 575
 576 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 577 {
 578         e2fsck_t ctx = e2fsck_global_ctx;
 579
 580         if (!ctx)
 581                 return;
 582
 583         e2fsck_clear_progbar(ctx);
 584         ctx->progress = 0;
 585 }
 586
 587 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 588 {
 589         e2fsck_t ctx = e2fsck_global_ctx;
 590
 591         if (!ctx)
 592                 exit(FSCK_CANCELED);
 593
 594         ctx->flags |= E2F_FLAG_CANCEL;
 595 }
 596 #endif
 597
 598 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 599 {
 600         char    *buf, *token, *next, *p, *arg;
 601         int     ea_ver;
 602         int     extended_usage = 0;
 603
 604         buf = string_copy(ctx, opts, 0);
 605         for (token = buf; token && *token; token = next) {
 606                 p = strchr(token, ',');
 607                 next = 0;
 608                 if (p) {
 609                         *p = 0;
 610                         next = p+1;
 611                 }
 612                 arg = strchr(token, '=');
 613                 if (arg) {
 614                         *arg = 0;
 615                         arg++;
 616                 }
 617                 if (strcmp(token, "ea_ver") == 0) {
 618                         if (!arg) {
 619                                 extended_usage++;
 620                                 continue;
 621                         }
 622                         ea_ver = strtoul(arg, &p, 0);
 623                         if (*p ||
 624                             ((ea_ver != 1) && (ea_ver != 2))) {
 625                                 fprintf(stderr,
 626                                         _("Invalid EA version.\n"));
 627                                 extended_usage++;
 628                                 continue;
 629                         }
 630                         ctx->ext_attr_ver = ea_ver;
 631                 } else if (strcmp(token, "fragcheck") == 0) {
 632                         ctx->options |= E2F_OPT_FRAGCHECK;
 633                         continue;
 634                 } else if (strcmp(token, "journal_only") == 0) {
 635                         if (arg) {
 636                                 extended_usage++;
 637                                 continue;
 638                         }
 639                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 640                 } else if (strcmp(token, "discard") == 0) {
 641                         ctx->options |= E2F_OPT_DISCARD;
 642                         continue;
 643                 } else if (strcmp(token, "nodiscard") == 0) {
 644                         ctx->options &= ~E2F_OPT_DISCARD;
 645                         continue;
 646                 } else {
 647                         fprintf(stderr, _("Unknown extended option: %s\n"),
 648                                 token);
 649                         extended_usage++;
 650                 }
 651         }
 652         free(buf);
 653
 654         if (extended_usage) {
 655                 fputs(("\nExtended options are separated by commas, "
 656                        "and may take an argument which\n"
 657                        "is set off by an equals ('=') sign.  "
 658                        "Valid extended options are:\n"), stderr);
 659                 fputs(("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 660                 fputs(("\tfragcheck\n"), stderr);
 661                 fputs(("\tjournal_only\n"), stderr);
 662                 fputs(("\tdiscard\n"), stderr);
 663                 fputs(("\tnodiscard\n"), stderr);
 664                 fputc('\n', stderr);
 665                 exit(1);
 666         }
 667 }
 668
 669 static void syntax_err_report(const char *filename, long err, int line_num)
 670 {
 671         fprintf(stderr,
 672                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 673                 filename, line_num, error_message(err));
 674         exit(FSCK_ERROR);
 675 }
 676
 677 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 678
 679 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 680 {
 681         int             flush = 0;
 682         int             c, fd;
 683 #ifdef MTRACE
 684         extern void     *mallwatch;
 685 #endif
 686         e2fsck_t        ctx;
 687         errcode_t       retval;
 688 #ifdef HAVE_SIGNAL_H
 689         struct sigaction        sa;
 690 #endif
 691         char            *extended_opts = 0;
 692         char            *cp;
 693         int             res;            /* result of sscanf */
 694 #ifdef CONFIG_JBD_DEBUG
 695         char            *jbd_debug;
 696 #endif
 697
 698         retval = e2fsck_allocate_context(&ctx);
 699         if (retval)
 700                 return retval;
 701
 702         *ret_ctx = ctx;
 703
 704         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 705         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 706         if (isatty(0) && isatty(1)) {
 707                 ctx->interactive = 1;
 708         } else {
 709                 ctx->start_meta[0] = '\001';
 710                 ctx->stop_meta[0] = '\002';
 711         }
 712         memset(bar, '=', sizeof(bar)-1);
 713         memset(spaces, ' ', sizeof(spaces)-1);
 714         add_error_table(&et_ext2_error_table);
 715         add_error_table(&et_prof_error_table);
 716         blkid_get_cache(&ctx->blkid, NULL);
 717
 718         if (argc && *argv)
 719                 ctx->program_name = *argv;
 720         else
 721                 ctx->program_name = "e2fsck";
 722
 723         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 724                 switch (c) {
 725                 case 'C':
 726                         ctx->progress = e2fsck_update_progress;
 727                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 728                         if (res != 1)
 729                                 goto sscanf_err;
 730
 731                         if (ctx->progress_fd < 0) {
 732                                 ctx->progress = 0;
 733                                 ctx->progress_fd = ctx->progress_fd * -1;
 734                         }
 735                         if (!ctx->progress_fd)
 736                                 break;
 737                         /* Validate the file descriptor to avoid disasters */
 738                         fd = dup(ctx->progress_fd);
 739                         if (fd < 0) {
 740                                 fprintf(stderr,
 741                                 _("Error validating file descriptor %d: %s\n"),
 742                                         ctx->progress_fd,
 743                                         error_message(errno));
 744                                 fatal_error(ctx,
 745                         _("Invalid completion information file descriptor"));
 746                         } else
 747                                 close(fd);
 748                         break;
 749                 case 'D':
 750                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 751                         break;
 752                 case 'E':
 753                         extended_opts = optarg;
 754                         break;
 755                 case 'p':
 756                 case 'a':
 757                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 758                         conflict_opt:
 759                                 fatal_error(ctx,
 760         _("Only one of the options -p/-a, -n or -y may be specified."));
 761                         }
 762                         ctx->options |= E2F_OPT_PREEN;
 763                         break;
 764                 case 'n':
 765                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 766                                 goto conflict_opt;
 767                         ctx->options |= E2F_OPT_NO;
 768                         break;
 769                 case 'y':
 770                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 771                                 goto conflict_opt;
 772                         ctx->options |= E2F_OPT_YES;
 773                         break;
 774                 case 't':
 775 #ifdef RESOURCE_TRACK
 776                         if (ctx->options & E2F_OPT_TIME)
 777                                 ctx->options |= E2F_OPT_TIME2;
 778                         else
 779                                 ctx->options |= E2F_OPT_TIME;
 780 #else
 781                         fprintf(stderr, _("The -t option is not "
 782                                 "supported on this version of e2fsck.\n"));
 783 #endif
 784                         break;
 785                 case 'c':
 786                         if (cflag++)
 787                                 ctx->options |= E2F_OPT_WRITECHECK;
 788                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 789                         break;
 790                 case 'r':
 791                         /* What we do by default, anyway! */
 792                         break;
 793                 case 'b':
 794                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
 795                         if (res != 1)
 796                                 goto sscanf_err;
 797                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 798                         break;
 799                 case 'B':
 800                         ctx->blocksize = atoi(optarg);
 801                         break;
 802                 case 'I':
 803                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 804                         if (res != 1)
 805                                 goto sscanf_err;
 806                         break;
 807                 case 'j':
 808                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 809                                                               optarg, NULL);
 810                         if (!ctx->journal_name) {
 811                                 com_err(ctx->program_name, 0,
 812                                         _("Unable to resolve '%s'"),
 813                                         optarg);
 814                                 fatal_error(ctx, 0);
 815                         }
 816                         break;
 817                 case 'P':
 818                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 819                         if (res != 1)
 820                                 goto sscanf_err;
 821                         break;
 822                 case 'L':
 823                         replace_bad_blocks++;
 824                 case 'l':
 825                         bad_blocks_file = string_copy(ctx, optarg, 0);
 826                         break;
 827                 case 'd':
 828                         ctx->options |= E2F_OPT_DEBUG;
 829                         break;
 830                 case 'f':
 831                         ctx->options |= E2F_OPT_FORCE;
 832                         break;
 833                 case 'F':
 834                         flush = 1;
 835                         break;
 836                 case 'v':
 837                         verbose = 1;
 838                         break;
 839                 case 'V':
 840                         show_version_only = 1;
 841                         break;
 842 #ifdef MTRACE
 843                 case 'M':
 844                         mallwatch = (void *) strtol(optarg, NULL, 0);
 845                         break;
 846 #endif
 847                 case 'N':
 848                         ctx->device_name = string_copy(ctx, optarg, 0);
 849                         break;
 850                 case 'k':
 851                         keep_bad_blocks++;
 852                         break;
 853                 default:
 854                         usage(ctx);
 855                 }
 856         if (show_version_only)
 857                 return 0;
 858         if (optind != argc - 1)
 859                 usage(ctx);
 860         if ((ctx->options & E2F_OPT_NO) &&
 861             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
 862                 com_err(ctx->program_name, 0,
 863                         _("The -n and -D options are incompatible."));
 864                 fatal_error(ctx, 0);
 865         }
 866         if ((ctx->options & E2F_OPT_NO) && cflag) {
 867                 com_err(ctx->program_name, 0,
 868                         _("The -n and -c options are incompatible."));
 869                 fatal_error(ctx, 0);
 870         }
 871         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
 872                 com_err(ctx->program_name, 0,
 873                         _("The -n and -l/-L options are incompatible."));
 874                 fatal_error(ctx, 0);
 875         }
 876         if (ctx->options & E2F_OPT_NO)
 877                 ctx->options |= E2F_OPT_READONLY;
 878
 879         ctx->io_options = strchr(argv[optind], '?');
 880         if (ctx->io_options)
 881                 *ctx->io_options++ = 0;
 882         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 883         if (!ctx->filesystem_name) {
 884                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 885                         argv[optind]);
 886                 fatal_error(ctx, 0);
 887         }
 888         if (extended_opts)
 889                 parse_extended_opts(ctx, extended_opts);
 890
 891         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 892                 config_fn[0] = cp;
 893         profile_set_syntax_err_cb(syntax_err_report);
 894         profile_init(config_fn, &ctx->profile);
 895
 896         if (flush) {
 897                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 898                 if (fd < 0) {
 899                         com_err("open", errno,
 900                                 _("while opening %s for flushing"),
 901                                 ctx->filesystem_name);
 902                         fatal_error(ctx, 0);
 903                 }
 904                 if ((retval = ext2fs_sync_device(fd, 1))) {
 905                         com_err("ext2fs_sync_device", retval,
 906                                 _("while trying to flush %s"),
 907                                 ctx->filesystem_name);
 908                         fatal_error(ctx, 0);
 909                 }
 910                 close(fd);
 911         }
 912         if (cflag && bad_blocks_file) {
 913                 fprintf(stderr, _("The -c and the -l/-L options may "
 914                                   "not be both used at the same time.\n"));
 915                 exit(FSCK_USAGE);
 916         }
 917 #ifdef HAVE_SIGNAL_H
 918         /*
 919          * Set up signal action
 920          */
 921         memset(&sa, 0, sizeof(struct sigaction));
 922         sa.sa_handler = signal_cancel;
 923         sigaction(SIGINT, &sa, 0);
 924         sigaction(SIGTERM, &sa, 0);
 925 #ifdef SA_RESTART
 926         sa.sa_flags = SA_RESTART;
 927 #endif
 928         e2fsck_global_ctx = ctx;
 929         sa.sa_handler = signal_progress_on;
 930         sigaction(SIGUSR1, &sa, 0);
 931         sa.sa_handler = signal_progress_off;
 932         sigaction(SIGUSR2, &sa, 0);
 933 #endif
 934
 935         /* Update our PATH to include /sbin if we need to run badblocks  */
 936         if (cflag) {
 937                 char *oldpath = getenv("PATH");
 938                 char *newpath;
 939                 int len = sizeof(PATH_SET) + 1;
 940
 941                 if (oldpath)
 942                         len += strlen(oldpath);
 943
 944                 newpath = malloc(len);
 945                 if (!newpath)
 946                         fatal_error(ctx, "Couldn't malloc() newpath");
 947                 strcpy(newpath, PATH_SET);
 948
 949                 if (oldpath) {
 950                         strcat(newpath, ":");
 951                         strcat(newpath, oldpath);
 952                 }
 953                 putenv(newpath);
 954         }
 955 #ifdef CONFIG_JBD_DEBUG
 956         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
 957         if (jbd_debug) {
 958                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
 959                 if (res != 1) {
 960                         fprintf(stderr,
 961                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
 962                                 jbd_debug);
 963                         exit (1);
 964                 }
 965         }
 966 #endif
 967         return 0;
 968
 969 sscanf_err:
 970         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
 971                 c, optarg);
 972         exit (1);
 973 }
 974
 975 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
 976                              ext2_filsys *ret_fs)
 977 {
 978         errcode_t retval;
 979
 980         *ret_fs = NULL;
 981         if (ctx->superblock && ctx->blocksize) {
 982                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 983                                       flags, ctx->superblock, ctx->blocksize,
 984                                       io_ptr, ret_fs);
 985         } else if (ctx->superblock) {
 986                 int blocksize;
 987                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 988                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 989                         if (*ret_fs) {
 990                                 ext2fs_free(*ret_fs);
 991                                 *ret_fs = NULL;
 992                         }
 993                         retval = ext2fs_open2(ctx->filesystem_name,
 994                                               ctx->io_options, flags,
 995                                               ctx->superblock, blocksize,
 996                                               io_ptr, ret_fs);
 997                         if (!retval)
 998                                 break;
 999                 }
1000         } else
1001                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1002                                       flags, 0, 0, io_ptr, ret_fs);
1003         return retval;
1004 }
1005
1006 static const char *my_ver_string = E2FSPROGS_VERSION;
1007 static const char *my_ver_date = E2FSPROGS_DATE;
1008
1009 int e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1010 {
1011         struct mmp_struct *mmp_s;
1012         unsigned int mmp_check_interval;
1013         errcode_t retval = 0;
1014         struct problem_context pctx;
1015         unsigned int wait_time = 0;
1016
1017         clear_problem_context(&pctx);
1018         if (fs->mmp_buf == NULL) {
1019                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1020                 if (retval)
1021                         goto check_error;
1022         }
1023
1024         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1025         if (retval)
1026                 goto check_error;
1027
1028         mmp_s = fs->mmp_buf;
1029
1030         mmp_check_interval = fs->super->s_mmp_update_interval;
1031         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1032                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1033
1034         /*
1035          * If check_interval in MMP block is larger, use that instead of
1036          * check_interval from the superblock.
1037          */
1038         if (mmp_s->mmp_check_interval > mmp_check_interval)
1039                 mmp_check_interval = mmp_s->mmp_check_interval;
1040
1041         wait_time = mmp_check_interval * 2 + 1;
1042
1043         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1044                 retval = 0;
1045         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1046                 retval = EXT2_ET_MMP_FSCK_ON;
1047         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1048                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1049
1050         if (retval)
1051                 goto check_error;
1052
1053         /* Print warning if e2fck will wait for more than 20 secs. */
1054         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1055                 printf("MMP interval is %u seconds and total wait time is %u "
1056                        "seconds. Please wait...\n",
1057                         mmp_check_interval, wait_time * 2);
1058         }
1059
1060         return 0;
1061
1062 check_error:
1063
1064         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1065                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1066                         fs->super->s_mmp_block = 0;
1067                         ext2fs_mark_super_dirty(fs);
1068                         retval = 0;
1069                 }
1070         } else if (retval == EXT2_ET_MMP_FAILED) {
1071                 com_err(ctx->program_name, retval,
1072                         _("while checking MMP block"));
1073                 dump_mmp_msg(fs->mmp_buf, NULL);
1074         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1075                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1076                 com_err(ctx->program_name, retval,
1077                         _("while checking MMP block"));
1078                 dump_mmp_msg(fs->mmp_buf,
1079                              _("If you are sure the filesystem is not "
1080                                "in use on any node, run:\n"
1081                                "'tune2fs -f -E clear_mmp {device}'\n"));
1082         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1083                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1084                         ext2fs_mmp_clear(fs);
1085                         retval = 0;
1086                 }
1087         }
1088         return retval;
1089 }
1090
1091 int main (int argc, char *argv[])
1092 {
1093         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1094         int             exit_value = FSCK_OK;
1095         ext2_filsys     fs = 0;
1096         io_manager      io_ptr;
1097         struct ext2_super_block *sb;
1098         const char      *lib_ver_date;
1099         int             my_ver, lib_ver;
1100         e2fsck_t        ctx;
1101         blk_t           orig_superblock;
1102         struct problem_context pctx;
1103         int flags, run_result;
1104         int journal_size;
1105         int sysval, sys_page_size = 4096;
1106         int old_bitmaps;
1107         __u32 features[3];
1108         char *cp;
1109
1110         clear_problem_context(&pctx);
1111         sigcatcher_setup();
1112 #ifdef MTRACE
1113         mtrace();
1114 #endif
1115 #ifdef MCHECK
1116         mcheck(0);
1117 #endif
1118 #ifdef ENABLE_NLS
1119         setlocale(LC_MESSAGES, "");
1120         setlocale(LC_CTYPE, "");
1121         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1122         textdomain(NLS_CAT_NAME);
1123 #endif
1124         my_ver = ext2fs_parse_version_string(my_ver_string);
1125         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1126         if (my_ver > lib_ver) {
1127                 fprintf( stderr, _("Error: ext2fs library version "
1128                         "out of date!\n"));
1129                 show_version_only++;
1130         }
1131
1132         retval = PRS(argc, argv, &ctx);
1133         if (retval) {
1134                 com_err("e2fsck", retval,
1135                         _("while trying to initialize program"));
1136                 exit(FSCK_ERROR);
1137         }
1138         reserve_stdio_fds();
1139
1140         init_resource_track(&ctx->global_rtrack, NULL);
1141         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1142                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
1143                          my_ver_date);
1144
1145         if (show_version_only) {
1146                 fprintf(stderr, _("\tUsing %s, %s\n"),
1147                         error_message(EXT2_ET_BASE), lib_ver_date);
1148                 exit(FSCK_OK);
1149         }
1150
1151         check_mount(ctx);
1152
1153         if (!(ctx->options & E2F_OPT_PREEN) &&
1154             !(ctx->options & E2F_OPT_NO) &&
1155             !(ctx->options & E2F_OPT_YES)) {
1156                 if (!ctx->interactive)
1157                         fatal_error(ctx,
1158                                     _("need terminal for interactive repairs"));
1159         }
1160         ctx->superblock = ctx->use_superblock;
1161
1162         flags = EXT2_FLAG_SKIP_MMP;
1163 restart:
1164 #ifdef CONFIG_TESTIO_DEBUG
1165         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1166                 io_ptr = test_io_manager;
1167                 test_io_backing_manager = unix_io_manager;
1168         } else
1169 #endif
1170                 io_ptr = unix_io_manager;
1171         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1172         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1173                             &old_bitmaps);
1174         if (!old_bitmaps)
1175                 flags |= EXT2_FLAG_64BITS;
1176         if ((ctx->options & E2F_OPT_READONLY) == 0)
1177                 flags |= EXT2_FLAG_RW;
1178         if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
1179                 flags |= EXT2_FLAG_EXCLUSIVE;
1180
1181         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1182
1183         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1184             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1185             ((retval == EXT2_ET_BAD_MAGIC) ||
1186              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1187              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1188                 if (retval2 == ENOMEM) {
1189                         retval = retval2;
1190                         goto failure;
1191                 }
1192                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1193                         ext2fs_free(fs);
1194                         fs = NULL;
1195                 }
1196                 if (!fs || (fs->group_desc_count > 1)) {
1197                         printf(_("%s: %s trying backup blocks...\n"),
1198                                ctx->program_name,
1199                                retval ? _("Superblock invalid,") :
1200                                _("Group descriptors look bad..."));
1201                         orig_superblock = ctx->superblock;
1202                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1203                         if (fs)
1204                                 ext2fs_close(fs);
1205                         orig_retval = retval;
1206                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1207                         if ((orig_retval == 0) && retval != 0) {
1208                                 if (fs)
1209                                         ext2fs_close(fs);
1210                                 com_err(ctx->program_name, retval,
1211                                         "when using the backup blocks");
1212                                 printf(_("%s: going back to original "
1213                                          "superblock\n"), ctx->program_name);
1214                                 ctx->superblock = orig_superblock;
1215                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1216                         }
1217                 }
1218         }
1219         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1220              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1221             fs && fs->super) {
1222                 sb = fs->super;
1223                 features[0] = (sb->s_feature_compat &
1224                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1225                 features[1] = (sb->s_feature_incompat &
1226                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1227                 features[2] = (sb->s_feature_ro_compat &
1228                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1229                 if (features[0] || features[1] || features[2])
1230                         goto print_unsupp_features;
1231         }
1232 failure:
1233         if (retval) {
1234                 if (orig_retval)
1235                         retval = orig_retval;
1236                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1237                         ctx->filesystem_name);
1238                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1239                         printf(_("The filesystem revision is apparently "
1240                                "too high for this version of e2fsck.\n"
1241                                "(Or the filesystem superblock "
1242                                "is corrupt)\n\n"));
1243                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1244                 } else if (retval == EXT2_ET_SHORT_READ)
1245                         printf(_("Could this be a zero-length partition?\n"));
1246                 else if ((retval == EPERM) || (retval == EACCES))
1247                         printf(_("You must have %s access to the "
1248                                "filesystem or be root\n"),
1249                                (ctx->options & E2F_OPT_READONLY) ?
1250                                "r/o" : "r/w");
1251                 else if (retval == ENXIO)
1252                         printf(_("Possibly non-existent or swap device?\n"));
1253                 else if (retval == EBUSY)
1254                         printf(_("Filesystem mounted or opened exclusively "
1255                                  "by another program?\n"));
1256                 else if (retval == ENOENT)
1257                         printf(_("Possibly non-existent device?\n"));
1258 #ifdef EROFS
1259                 else if (retval == EROFS)
1260                         printf(_("Disk write-protected; use the -n option "
1261                                "to do a read-only\n"
1262                                "check of the device.\n"));
1263 #endif
1264                 else
1265                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1266                 fatal_error(ctx, 0);
1267         }
1268         /*
1269          * We only update the master superblock because (a) paranoia;
1270          * we don't want to corrupt the backup superblocks, and (b) we
1271          * don't need to update the mount count and last checked
1272          * fields in the backup superblock (the kernel doesn't update
1273          * the backup superblocks anyway).  With newer versions of the
1274          * library this flag is set by ext2fs_open2(), but we set this
1275          * here just to be sure.  (No, we don't support e2fsck running
1276          * with some other libext2fs than the one that it was shipped
1277          * with, but just in case....)
1278          */
1279         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1280
1281         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1282                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1283                 int need_restart = 0;
1284
1285                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1286                                                        blocksize,
1287                                                        &ctx->num_blocks);
1288                 /*
1289                  * The floppy driver refuses to allow anyone else to
1290                  * open the device if has been opened with O_EXCL;
1291                  * this is unlike other block device drivers in Linux.
1292                  * To handle this, we close the filesystem and then
1293                  * reopen the filesystem after we get the device size.
1294                  */
1295                 if (pctx.errcode == EBUSY) {
1296                         ext2fs_close(fs);
1297                         need_restart++;
1298                         pctx.errcode =
1299                                 ext2fs_get_device_size2(ctx->filesystem_name,
1300                                                         blocksize,
1301                                                         &ctx->num_blocks);
1302                 }
1303                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1304                         ctx->num_blocks = 0;
1305                 else if (pctx.errcode) {
1306                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1307                         ctx->flags |= E2F_FLAG_ABORT;
1308                         fatal_error(ctx, 0);
1309                 }
1310                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1311                 if (need_restart)
1312                         goto restart;
1313         }
1314
1315         ctx->fs = fs;
1316         fs->priv_data = ctx;
1317         fs->now = ctx->now;
1318         sb = fs->super;
1319         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1320                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1321                         _("while trying to open %s"),
1322                         ctx->filesystem_name);
1323         get_newer:
1324                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1325         }
1326
1327         /*
1328          * Set the device name, which is used whenever we print error
1329          * or informational messages to the user.
1330          */
1331         if (ctx->device_name == 0 &&
1332             (sb->s_volume_name[0] != 0)) {
1333                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1334                                                sizeof(sb->s_volume_name));
1335         }
1336         if (ctx->device_name == 0)
1337                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1338         for (cp = ctx->device_name; *cp; cp++)
1339                 if (isspace(*cp) || *cp == ':')
1340                         *cp = '_';
1341
1342         ehandler_init(fs->io);
1343
1344         if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
1345             (flags & EXT2_FLAG_SKIP_MMP)) {
1346                 if (e2fsck_check_mmp(fs, ctx))
1347                         fatal_error(ctx, 0);
1348         }
1349
1350          /*
1351           * Restart in order to reopen fs but this time start mmp.
1352           */
1353         if (flags & EXT2_FLAG_SKIP_MMP) {
1354                 ext2fs_close(fs);
1355                 ctx->fs = NULL;
1356                 flags &= ~EXT2_FLAG_SKIP_MMP;
1357                 goto restart;
1358         }
1359
1360         if ((ctx->mount_flags & EXT2_MF_MOUNTED) &&
1361             !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER))
1362                 goto skip_journal;
1363
1364         /*
1365          * Make sure the ext3 superblock fields are consistent.
1366          */
1367         retval = e2fsck_check_ext3_journal(ctx);
1368         if (retval) {
1369                 com_err(ctx->program_name, retval,
1370                         _("while checking ext3 journal for %s"),
1371                         ctx->device_name);
1372                 fatal_error(ctx, 0);
1373         }
1374
1375         /*
1376          * Check to see if we need to do ext3-style recovery.  If so,
1377          * do it, and then restart the fsck.
1378          */
1379         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1380                 if (ctx->options & E2F_OPT_READONLY) {
1381                         printf(_("Warning: skipping journal recovery "
1382                                  "because doing a read-only filesystem "
1383                                  "check.\n"));
1384                         io_channel_flush(ctx->fs->io);
1385                 } else {
1386                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1387                                 /*
1388                                  * Whoops, we attempted to run the
1389                                  * journal twice.  This should never
1390                                  * happen, unless the hardware or
1391                                  * device driver is being bogus.
1392                                  */
1393                                 com_err(ctx->program_name, 0,
1394                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1395                                 fatal_error(ctx, 0);
1396                         }
1397                         retval = e2fsck_run_ext3_journal(ctx);
1398                         if (retval) {
1399                                 com_err(ctx->program_name, retval,
1400                                 _("while recovering ext3 journal of %s"),
1401                                         ctx->device_name);
1402                                 fatal_error(ctx, 0);
1403                         }
1404                         ext2fs_close(ctx->fs);
1405                         ctx->fs = 0;
1406                         ctx->flags |= E2F_FLAG_RESTARTED;
1407                         goto restart;
1408                 }
1409         }
1410
1411 skip_journal:
1412         /*
1413          * Check for compatibility with the feature sets.  We need to
1414          * be more stringent than ext2fs_open().
1415          */
1416         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1417         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1418         features[2] = (sb->s_feature_ro_compat &
1419                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1420 print_unsupp_features:
1421         if (features[0] || features[1] || features[2]) {
1422                 int     i, j;
1423                 __u32   *mask = features, m;
1424
1425                 fprintf(stderr, _("%s has unsupported feature(s):"),
1426                         ctx->filesystem_name);
1427
1428                 for (i=0; i <3; i++,mask++) {
1429                         for (j=0,m=1; j < 32; j++, m<<=1) {
1430                                 if (*mask & m)
1431                                         fprintf(stderr, " %s",
1432                                                 e2p_feature2string(i, m));
1433                         }
1434                 }
1435                 putc('\n', stderr);
1436                 goto get_newer;
1437         }
1438 #ifdef ENABLE_COMPRESSION
1439         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1440                 com_err(ctx->program_name, 0,
1441                         _("Warning: compression support is experimental.\n"));
1442 #endif
1443 #ifndef ENABLE_HTREE
1444         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1445                 com_err(ctx->program_name, 0,
1446                         _("E2fsck not compiled with HTREE support,\n\t"
1447                           "but filesystem %s has HTREE directories.\n"),
1448                         ctx->device_name);
1449                 goto get_newer;
1450         }
1451 #endif
1452
1453         /*
1454          * If the user specified a specific superblock, presumably the
1455          * master superblock has been trashed.  So we mark the
1456          * superblock as dirty, so it can be written out.
1457          */
1458         if (ctx->superblock &&
1459             !(ctx->options & E2F_OPT_READONLY))
1460                 ext2fs_mark_super_dirty(fs);
1461
1462         /*
1463          * Calculate the number of filesystem blocks per pagesize.  If
1464          * fs->blocksize > page_size, set the number of blocks per
1465          * pagesize to 1 to avoid division by zero errors.
1466          */
1467 #ifdef _SC_PAGESIZE
1468         sysval = sysconf(_SC_PAGESIZE);
1469         if (sysval > 0)
1470                 sys_page_size = sysval;
1471 #endif /* _SC_PAGESIZE */
1472         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1473         if (ctx->blocks_per_page == 0)
1474                 ctx->blocks_per_page = 1;
1475
1476         if (ctx->superblock)
1477                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1478         ext2fs_mark_valid(fs);
1479         check_super_block(ctx);
1480         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1481                 fatal_error(ctx, 0);
1482         check_if_skip(ctx);
1483         check_resize_inode(ctx);
1484         if (bad_blocks_file)
1485                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1486         else if (cflag)
1487                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1488         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1489                 fatal_error(ctx, 0);
1490
1491         /*
1492          * Mark the system as valid, 'til proven otherwise
1493          */
1494         ext2fs_mark_valid(fs);
1495
1496         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1497         if (retval) {
1498                 com_err(ctx->program_name, retval,
1499                         _("while reading bad blocks inode"));
1500                 preenhalt(ctx);
1501                 printf(_("This doesn't bode well,"
1502                          " but we'll try to go on...\n"));
1503         }
1504
1505         /*
1506          * Save the journal size in megabytes.
1507          * Try and use the journal size from the backup else let e2fsck
1508          * find the default journal size.
1509          */
1510         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1511                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1512                                (sb->s_jnl_blocks[16] >> 20);
1513         else
1514                 journal_size = -1;
1515
1516         if (sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA) {
1517                 int qtype;
1518                 /* Quotas were enabled. Do quota accounting during fsck. */
1519                 if ((sb->s_usr_quota_inum && sb->s_grp_quota_inum) ||
1520                     (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum))
1521                         qtype = -1;
1522                 else
1523                         qtype = sb->s_usr_quota_inum ? USRQUOTA : GRPQUOTA;
1524
1525                 init_quota_context(&ctx->qctx, ctx->fs, qtype);
1526         }
1527
1528         run_result = e2fsck_run(ctx);
1529         e2fsck_clear_progbar(ctx);
1530
1531         if (ctx->flags & E2F_FLAG_JOURNAL_INODE) {
1532                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1533                         if (journal_size < 1024)
1534                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
1535                         if (journal_size < 0) {
1536                                 fs->super->s_feature_compat &=
1537                                         ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1538                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1539                                 com_err(ctx->program_name, 0,
1540                                         _("Couldn't determine journal size"));
1541                                 goto no_journal;
1542                         }
1543                         printf(_("Creating journal (%d blocks): "),
1544                                journal_size);
1545                         fflush(stdout);
1546                         retval = ext2fs_add_journal_inode(fs,
1547                                                           journal_size, 0);
1548                         if (retval) {
1549                                 com_err("Error ", retval,
1550                                         _("\n\twhile trying to create journal"));
1551                                 goto no_journal;
1552                         }
1553                         printf(_(" Done.\n"));
1554                         printf(_("\n*** journal has been re-created - "
1555                                        "filesystem is now ext3 again ***\n"));
1556                 }
1557         }
1558 no_journal:
1559
1560         if (ctx->qctx) {
1561                 write_quota_inode(ctx->qctx, -1);
1562                 release_quota_context(&ctx->qctx);
1563         }
1564
1565         if (run_result == E2F_FLAG_RESTART) {
1566                 printf(_("Restarting e2fsck from the beginning...\n"));
1567                 retval = e2fsck_reset_context(ctx);
1568                 if (retval) {
1569                         com_err(ctx->program_name, retval,
1570                                 _("while resetting context"));
1571                         fatal_error(ctx, 0);
1572                 }
1573                 ext2fs_close(fs);
1574                 goto restart;
1575         }
1576         if (run_result & E2F_FLAG_CANCEL) {
1577                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1578                        ctx->device_name : ctx->filesystem_name);
1579                 exit_value |= FSCK_CANCELED;
1580         }
1581         if (run_result & E2F_FLAG_ABORT)
1582                 fatal_error(ctx, _("aborted"));
1583         if (check_backup_super_block(ctx)) {
1584                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1585                 ext2fs_mark_super_dirty(fs);
1586         }
1587
1588 #ifdef MTRACE
1589         mtrace_print("Cleanup");
1590 #endif
1591         if (ext2fs_test_changed(fs)) {
1592                 exit_value |= FSCK_NONDESTRUCT;
1593                 if (!(ctx->options & E2F_OPT_PREEN))
1594                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1595                                ctx->device_name);
1596                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1597                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1598                                ctx->device_name);
1599                         exit_value |= FSCK_REBOOT;
1600                 }
1601         }
1602         if (!ext2fs_test_valid(fs) ||
1603             ((exit_value & FSCK_CANCELED) &&
1604              (sb->s_state & EXT2_ERROR_FS))) {
1605                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1606                          "errors **********\n\n"), ctx->device_name);
1607                 exit_value |= FSCK_UNCORRECTED;
1608                 exit_value &= ~FSCK_NONDESTRUCT;
1609         }
1610         if (exit_value & FSCK_CANCELED) {
1611                 int     allow_cancellation;
1612
1613                 profile_get_boolean(ctx->profile, "options",
1614                                     "allow_cancellation", 0, 0,
1615                                     &allow_cancellation);
1616                 exit_value &= ~FSCK_NONDESTRUCT;
1617                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1618                     (sb->s_state & EXT2_VALID_FS) &&
1619                     !(sb->s_state & EXT2_ERROR_FS))
1620                         exit_value = 0;
1621         } else {
1622                 show_stats(ctx);
1623                 if (!(ctx->options & E2F_OPT_READONLY)) {
1624                         if (ext2fs_test_valid(fs)) {
1625                                 if (!(sb->s_state & EXT2_VALID_FS))
1626                                         exit_value |= FSCK_NONDESTRUCT;
1627                                 sb->s_state = EXT2_VALID_FS;
1628                         } else
1629                                 sb->s_state &= ~EXT2_VALID_FS;
1630                         sb->s_mnt_count = 0;
1631                         if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
1632                                 sb->s_lastcheck = ctx->now;
1633                         memset(((char *) sb) + EXT4_S_ERR_START, 0,
1634                                EXT4_S_ERR_LEN);
1635                         ext2fs_mark_super_dirty(fs);
1636                 }
1637         }
1638
1639         if ((run_result & E2F_FLAG_CANCEL) == 0 &&
1640             sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM &&
1641             !(ctx->options & E2F_OPT_READONLY)) {
1642                 retval = ext2fs_set_gdt_csum(ctx->fs);
1643                 if (retval) {
1644                         com_err(ctx->program_name, retval,
1645                                 _("while setting block group checksum info"));
1646                         fatal_error(ctx, 0);
1647                 }
1648         }
1649
1650         e2fsck_write_bitmaps(ctx);
1651         io_channel_flush(ctx->fs->io);
1652         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
1653
1654         ext2fs_close(fs);
1655         ctx->fs = NULL;
1656         free(ctx->journal_name);
1657
1658         e2fsck_free_context(ctx);
1659         remove_error_table(&et_ext2_error_table);
1660         remove_error_table(&et_prof_error_table);
1661         return exit_value;
1662 }