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_SYS_IOCTL_H
  37 #include <sys/ioctl.h>
  38 #endif
  39 #ifdef HAVE_MALLOC_H
  40 #include <malloc.h>
  41 #endif
  42 #ifdef HAVE_SYS_TYPES_H
  43 #include <sys/types.h>
  44 #endif
  45 #ifdef HAVE_DIRENT_H
  46 #include <dirent.h>
  47 #endif
  48 #include <libgen.h>
  49
  50 #include "e2p/e2p.h"
  51 #include "et/com_err.h"
  52 #include "e2p/e2p.h"
  53 #include "support/plausible.h"
  54 #include "e2fsck.h"
  55 #include "problem.h"
  56 #include "jfs_user.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-jbd-debug */
  71 int journal_enable_debug = -1;
  72 #endif
  73
  74 static void usage(e2fsck_t ctx)
  75 {
  76         fprintf(stderr,
  77                 _("Usage: %s [-panyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  78                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  79                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  80                 ctx->program_name);
  81
  82         fprintf(stderr, "%s", _("\nEmergency help:\n"
  83                 " -p                   Automatic repair (no questions)\n"
  84                 " -n                   Make no changes to the filesystem\n"
  85                 " -y                   Assume \"yes\" to all questions\n"
  86                 " -c                   Check for bad blocks and add them to the badblock list\n"
  87                 " -f                   Force checking even if filesystem is marked clean\n"));
  88         fprintf(stderr, "%s", _(""
  89                 " -v                   Be verbose\n"
  90                 " -b superblock        Use alternative superblock\n"
  91                 " -B blocksize         Force blocksize when looking for superblock\n"
  92                 " -j external_journal  Set location of the external journal\n"
  93                 " -l bad_blocks_file   Add to badblocks list\n"
  94                 " -L bad_blocks_file   Set badblocks list\n"
  95                 " -z undo_file         Create an undo file\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         __u32 *mask, m;
 109         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 110         int i, j, printed = 0;
 111
 112         dir_links = 2 * ctx->fs_directory_count - 1;
 113         num_files = ctx->fs_total_count - dir_links;
 114         num_links = ctx->fs_links_count - dir_links;
 115         inodes = fs->super->s_inodes_count;
 116         inodes_used = (fs->super->s_inodes_count -
 117                        fs->super->s_free_inodes_count);
 118         blocks = ext2fs_blocks_count(fs->super);
 119         blocks_used = (ext2fs_blocks_count(fs->super) -
 120                        ext2fs_free_blocks_count(fs->super));
 121
 122         if (inodes_used > 0) {
 123                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 124                 frag_percent_file = (frag_percent_file + 5) / 10;
 125
 126                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 127                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 128
 129                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 130                                                 ctx->fs_fragmented_dir))
 131                                       / inodes_used);
 132                 frag_percent_total = (frag_percent_total + 5) / 10;
 133         }
 134
 135         if (!verbose) {
 136                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 137                                "%llu/%llu blocks\n"),
 138                         ctx->device_name, inodes_used, inodes,
 139                         frag_percent_total / 10, frag_percent_total % 10,
 140                         blocks_used, blocks);
 141                 return;
 142         }
 143         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 144                             &i);
 145         if (verbose && i) {
 146                 log_out(ctx, "\nFilesystem features:");
 147                 mask = &ctx->fs->super->s_feature_compat;
 148                 for (i = 0; i < 3; i++, mask++) {
 149                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 150                                 if (*mask & m) {
 151                                         log_out(ctx, " %s",
 152                                                 e2p_feature2string(i, m));
 153                                         printed++;
 154                                 }
 155                         }
 156                 }
 157                 if (printed == 0)
 158                         log_out(ctx, " (none)");
 159                 log_out(ctx, "\n");
 160         }
 161
 162         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 163                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 164                         inodes_used), inodes_used,
 165                 100.0 * inodes_used / inodes, inodes);
 166         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 167                         "%12u non-contiguous files (%0d.%d%%)\n",
 168                         ctx->fs_fragmented),
 169                 ctx->fs_fragmented, frag_percent_file / 10,
 170                 frag_percent_file % 10);
 171         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 172                         "%12u non-contiguous directories (%0d.%d%%)\n",
 173                         ctx->fs_fragmented_dir),
 174                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 175                 frag_percent_dir % 10);
 176         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 177                        "%u/%u/%u\n"),
 178                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 179
 180         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 181                 if (ctx->extent_depth_count[j])
 182                         break;
 183         if (++j) {
 184                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 185                 for (i=0; i < j; i++) {
 186                         if (i)
 187                                 fputc('/', stdout);
 188                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 189                 }
 190                 log_out(ctx, "\n");
 191         }
 192
 193         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 194                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 195                    blocks_used),
 196                 blocks_used, 100.0 * blocks_used / blocks, blocks);
 197         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 198                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 199         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 200                         ctx->large_files), ctx->large_files);
 201         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 202                         ctx->fs_regular_count), ctx->fs_regular_count);
 203         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 204                         ctx->fs_directory_count), ctx->fs_directory_count);
 205         log_out(ctx, P_("%12u character device file\n",
 206                         "%12u character device files\n", ctx->fs_chardev_count),
 207                 ctx->fs_chardev_count);
 208         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 209                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 210         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 211                 ctx->fs_fifo_count);
 212         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 213                 ctx->fs_links_count - dir_links);
 214         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 215                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 216         log_out(ctx, P_(" (%u fast symbolic link)\n",
 217                         " (%u fast symbolic links)\n",
 218                         ctx->fs_fast_symlinks_count),
 219                 ctx->fs_fast_symlinks_count);
 220         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 221                         ctx->fs_sockets_count),
 222                 ctx->fs_sockets_count);
 223         log_out(ctx, "------------\n");
 224         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 225                 num_files);
 226 }
 227
 228 static void check_mount(e2fsck_t ctx)
 229 {
 230         errcode_t       retval;
 231         int             cont;
 232
 233         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 234                                          &ctx->mount_flags);
 235         if (retval) {
 236                 com_err("ext2fs_check_if_mount", retval,
 237                         _("while determining whether %s is mounted."),
 238                         ctx->filesystem_name);
 239                 return;
 240         }
 241
 242         /*
 243          * If the filesystem isn't mounted, or it's the root
 244          * filesystem and it's mounted read-only, and we're not doing
 245          * a read/write check, then everything's fine.
 246          */
 247         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 248             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 249              (ctx->mount_flags & EXT2_MF_READONLY) &&
 250              !(ctx->options & E2F_OPT_WRITECHECK)))
 251                 return;
 252
 253         if (((ctx->options & E2F_OPT_READONLY) ||
 254              ((ctx->options & E2F_OPT_FORCE) &&
 255               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 256             !(ctx->options & E2F_OPT_WRITECHECK)) {
 257                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 258                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 259                                         ctx->filesystem_name);
 260                 else
 261                         log_out(ctx, _("Warning!  %s is in use.\n"),
 262                                         ctx->filesystem_name);
 263                 return;
 264         }
 265
 266         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 267                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 268         else
 269                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 270         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 271                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 272         puts("\007\007\007\007");
 273         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 274                        "The filesystem is mounted.   "
 275                        "If you continue you ***WILL***\n"
 276                        "cause ***SEVERE*** filesystem damage.\n\n"));
 277         puts("\007\007\007");
 278         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 279         if (!cont) {
 280                 printf("%s", _("check aborted.\n"));
 281                 exit (0);
 282         }
 283         return;
 284 }
 285
 286 static int is_on_batt(void)
 287 {
 288         FILE    *f;
 289         DIR     *d;
 290         char    tmp[80], tmp2[80], fname[80];
 291         unsigned int    acflag;
 292         struct dirent*  de;
 293
 294         f = fopen("/sys/class/power_supply/AC/online", "r");
 295         if (f) {
 296                 if (fscanf(f, "%u\n", &acflag) == 1) {
 297                         fclose(f);
 298                         return (!acflag);
 299                 }
 300                 fclose(f);
 301         }
 302         f = fopen("/proc/apm", "r");
 303         if (f) {
 304                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 305                         acflag = 1;
 306                 fclose(f);
 307                 return (acflag != 1);
 308         }
 309         d = opendir("/proc/acpi/ac_adapter");
 310         if (d) {
 311                 while ((de=readdir(d)) != NULL) {
 312                         if (!strncmp(".", de->d_name, 1))
 313                                 continue;
 314                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 315                                  de->d_name);
 316                         f = fopen(fname, "r");
 317                         if (!f)
 318                                 continue;
 319                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 320                                 tmp[0] = 0;
 321                         fclose(f);
 322                         if (strncmp(tmp, "off-line", 8) == 0) {
 323                                 closedir(d);
 324                                 return 1;
 325                         }
 326                 }
 327                 closedir(d);
 328         }
 329         return 0;
 330 }
 331
 332 /*
 333  * This routine checks to see if a filesystem can be skipped; if so,
 334  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 335  * message explaining why a check is being forced.
 336  */
 337 static void check_if_skip(e2fsck_t ctx)
 338 {
 339         ext2_filsys fs = ctx->fs;
 340         struct problem_context pctx;
 341         const char *reason = NULL;
 342         unsigned int reason_arg = 0;
 343         long next_check;
 344         int batt = is_on_batt();
 345         int defer_check_on_battery;
 346         int broken_system_clock;
 347         time_t lastcheck;
 348
 349         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 350                 return;
 351
 352         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 353                             0, 0, &broken_system_clock);
 354         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 355                 broken_system_clock = 1;
 356         profile_get_boolean(ctx->profile, "options",
 357                             "defer_check_on_battery", 0, 1,
 358                             &defer_check_on_battery);
 359         if (!defer_check_on_battery)
 360                 batt = 0;
 361
 362         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 363                 return;
 364
 365         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 366                 goto skip;
 367
 368         lastcheck = fs->super->s_lastcheck;
 369         if (lastcheck > ctx->now)
 370                 lastcheck -= ctx->time_fudge;
 371         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 372             !ext2fs_test_valid(fs))
 373                 reason = _(" contains a file system with errors");
 374         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 375                 reason = _(" was not cleanly unmounted");
 376         else if (check_backup_super_block(ctx))
 377                 reason = _(" primary superblock features different from backup");
 378         else if ((fs->super->s_max_mnt_count > 0) &&
 379                  (fs->super->s_mnt_count >=
 380                   (unsigned) fs->super->s_max_mnt_count)) {
 381                 reason = _(" has been mounted %u times without being checked");
 382                 reason_arg = fs->super->s_mnt_count;
 383                 if (batt && (fs->super->s_mnt_count <
 384                              (unsigned) fs->super->s_max_mnt_count*2))
 385                         reason = 0;
 386         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 387                    (ctx->now < lastcheck)) {
 388                 reason = _(" has filesystem last checked time in the future");
 389                 if (batt)
 390                         reason = 0;
 391         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 392                    ((ctx->now - lastcheck) >=
 393                     ((time_t) fs->super->s_checkinterval))) {
 394                 reason = _(" has gone %u days without being checked");
 395                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 396                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 397                              fs->super->s_checkinterval*2))
 398                         reason = 0;
 399         } else if (broken_system_clock && fs->super->s_checkinterval) {
 400                 log_out(ctx, "%s: ", ctx->device_name);
 401                 log_out(ctx, "%s",
 402                         _("ignoring check interval, broken_system_clock set\n"));
 403         }
 404
 405         if (reason) {
 406                 log_out(ctx, "%s", ctx->device_name);
 407                 log_out(ctx, reason, reason_arg);
 408                 log_out(ctx, "%s", _(", check forced.\n"));
 409                 return;
 410         }
 411
 412         /*
 413          * Update the global counts from the block group counts.  This
 414          * is needed since modern kernels don't update the global
 415          * counts so as to avoid locking the entire file system.  So
 416          * if the filesystem is not unmounted cleanly, the global
 417          * counts may not be accurate.  Update them here if we can,
 418          * for the benefit of users who might examine the file system
 419          * using dumpe2fs.  (This is for cosmetic reasons only.)
 420          */
 421         clear_problem_context(&pctx);
 422         pctx.ino = fs->super->s_free_inodes_count;
 423         pctx.ino2 = ctx->free_inodes;
 424         if ((pctx.ino != pctx.ino2) &&
 425             !(ctx->options & E2F_OPT_READONLY) &&
 426             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 427                 fs->super->s_free_inodes_count = ctx->free_inodes;
 428                 ext2fs_mark_super_dirty(fs);
 429         }
 430         clear_problem_context(&pctx);
 431         pctx.blk = ext2fs_free_blocks_count(fs->super);
 432         pctx.blk2 = ctx->free_blocks;
 433         if ((pctx.blk != pctx.blk2) &&
 434             !(ctx->options & E2F_OPT_READONLY) &&
 435             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 436                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 437                 ext2fs_mark_super_dirty(fs);
 438         }
 439
 440         /* Print the summary message when we're skipping a full check */
 441         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 442                 ctx->device_name,
 443                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 444                 fs->super->s_inodes_count,
 445                 ext2fs_blocks_count(fs->super) -
 446                 ext2fs_free_blocks_count(fs->super),
 447                 ext2fs_blocks_count(fs->super));
 448         next_check = 100000;
 449         if (fs->super->s_max_mnt_count > 0) {
 450                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 451                 if (next_check <= 0)
 452                         next_check = 1;
 453         }
 454         if (!broken_system_clock && fs->super->s_checkinterval &&
 455             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 456                 next_check = 1;
 457         if (next_check <= 5) {
 458                 if (next_check == 1) {
 459                         if (batt)
 460                                 log_out(ctx, "%s",
 461                                         _(" (check deferred; on battery)"));
 462                         else
 463                                 log_out(ctx, "%s",
 464                                         _(" (check after next mount)"));
 465                 } else
 466                         log_out(ctx, _(" (check in %ld mounts)"),
 467                                 next_check);
 468         }
 469         log_out(ctx, "\n");
 470 skip:
 471         ext2fs_close_free(&ctx->fs);
 472         e2fsck_free_context(ctx);
 473         exit(FSCK_OK);
 474 }
 475
 476 /*
 477  * For completion notice
 478  */
 479 struct percent_tbl {
 480         int     max_pass;
 481         int     table[32];
 482 };
 483 static struct percent_tbl e2fsck_tbl = {
 484         5, { 0, 70, 90, 92,  95, 100 }
 485 };
 486 static char bar[128], spaces[128];
 487
 488 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 489                           int max)
 490 {
 491         float   percent;
 492
 493         if (pass <= 0)
 494                 return 0.0;
 495         if (pass > tbl->max_pass || max == 0)
 496                 return 100.0;
 497         percent = ((float) curr) / ((float) max);
 498         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 499                 + tbl->table[pass-1]);
 500 }
 501
 502 void e2fsck_clear_progbar(e2fsck_t ctx)
 503 {
 504         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 505                 return;
 506
 507         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 508                ctx->stop_meta);
 509         fflush(stdout);
 510         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 511 }
 512
 513 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 514                            unsigned int dpynum)
 515 {
 516         static const char spinner[] = "\\|/-";
 517         int     i;
 518         unsigned int    tick;
 519         struct timeval  tv;
 520         int dpywidth;
 521         int fixed_percent;
 522
 523         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 524                 return 0;
 525
 526         /*
 527          * Calculate the new progress position.  If the
 528          * percentage hasn't changed, then we skip out right
 529          * away.
 530          */
 531         fixed_percent = (int) ((10 * percent) + 0.5);
 532         if (ctx->progress_last_percent == fixed_percent)
 533                 return 0;
 534         ctx->progress_last_percent = fixed_percent;
 535
 536         /*
 537          * If we've already updated the spinner once within
 538          * the last 1/8th of a second, no point doing it
 539          * again.
 540          */
 541         gettimeofday(&tv, NULL);
 542         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 543         if ((tick == ctx->progress_last_time) &&
 544             (fixed_percent != 0) && (fixed_percent != 1000))
 545                 return 0;
 546         ctx->progress_last_time = tick;
 547
 548         /*
 549          * Advance the spinner, and note that the progress bar
 550          * will be on the screen
 551          */
 552         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 553         ctx->flags |= E2F_FLAG_PROG_BAR;
 554
 555         dpywidth = 66 - strlen(label);
 556         dpywidth = 8 * (dpywidth / 8);
 557         if (dpynum)
 558                 dpywidth -= 8;
 559
 560         i = ((percent * dpywidth) + 50) / 100;
 561         printf("%s%s: |%s%s", ctx->start_meta, label,
 562                bar + (sizeof(bar) - (i+1)),
 563                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 564         if (fixed_percent == 1000)
 565                 fputc('|', stdout);
 566         else
 567                 fputc(spinner[ctx->progress_pos & 3], stdout);
 568         printf(" %4.1f%%  ", percent);
 569         if (dpynum)
 570                 printf("%u\r", dpynum);
 571         else
 572                 fputs(" \r", stdout);
 573         fputs(ctx->stop_meta, stdout);
 574
 575         if (fixed_percent == 1000)
 576                 e2fsck_clear_progbar(ctx);
 577         fflush(stdout);
 578
 579         return 0;
 580 }
 581
 582 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 583                                   unsigned long cur, unsigned long max)
 584 {
 585         char buf[1024];
 586         float percent;
 587
 588         if (pass == 0)
 589                 return 0;
 590
 591         if (ctx->progress_fd) {
 592                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 593                          pass, cur, max, ctx->device_name);
 594                 write_all(ctx->progress_fd, buf, strlen(buf));
 595         } else {
 596                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 597                 e2fsck_simple_progress(ctx, ctx->device_name,
 598                                        percent, 0);
 599         }
 600         return 0;
 601 }
 602
 603 #define PATH_SET "PATH=/sbin"
 604
 605 /*
 606  * Make sure 0,1,2 file descriptors are open, so that we don't open
 607  * the filesystem using the same file descriptor as stdout or stderr.
 608  */
 609 static void reserve_stdio_fds(void)
 610 {
 611         int     fd = 0;
 612
 613         while (fd <= 2) {
 614                 fd = open("/dev/null", O_RDWR);
 615                 if (fd < 0) {
 616                         fprintf(stderr, _("ERROR: Couldn't open "
 617                                 "/dev/null (%s)\n"),
 618                                 strerror(errno));
 619                         break;
 620                 }
 621         }
 622 }
 623
 624 #ifdef HAVE_SIGNAL_H
 625 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 626 {
 627         e2fsck_t ctx = e2fsck_global_ctx;
 628
 629         if (!ctx)
 630                 return;
 631
 632         ctx->progress = e2fsck_update_progress;
 633 }
 634
 635 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 636 {
 637         e2fsck_t ctx = e2fsck_global_ctx;
 638
 639         if (!ctx)
 640                 return;
 641
 642         e2fsck_clear_progbar(ctx);
 643         ctx->progress = 0;
 644 }
 645
 646 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 647 {
 648         e2fsck_t ctx = e2fsck_global_ctx;
 649
 650         if (!ctx)
 651                 exit(FSCK_CANCELED);
 652
 653         ctx->flags |= E2F_FLAG_CANCEL;
 654 }
 655 #endif
 656
 657 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 658 {
 659         char    *buf, *token, *next, *p, *arg;
 660         int     ea_ver;
 661         int     extended_usage = 0;
 662         unsigned long long reada_kb;
 663
 664         buf = string_copy(ctx, opts, 0);
 665         for (token = buf; token && *token; token = next) {
 666                 p = strchr(token, ',');
 667                 next = 0;
 668                 if (p) {
 669                         *p = 0;
 670                         next = p+1;
 671                 }
 672                 arg = strchr(token, '=');
 673                 if (arg) {
 674                         *arg = 0;
 675                         arg++;
 676                 }
 677                 if (strcmp(token, "ea_ver") == 0) {
 678                         if (!arg) {
 679                                 extended_usage++;
 680                                 continue;
 681                         }
 682                         ea_ver = strtoul(arg, &p, 0);
 683                         if (*p ||
 684                             ((ea_ver != 1) && (ea_ver != 2))) {
 685                                 fprintf(stderr, "%s",
 686                                         _("Invalid EA version.\n"));
 687                                 extended_usage++;
 688                                 continue;
 689                         }
 690                         ctx->ext_attr_ver = ea_ver;
 691                 } else if (strcmp(token, "readahead_kb") == 0) {
 692                         if (!arg) {
 693                                 extended_usage++;
 694                                 continue;
 695                         }
 696                         reada_kb = strtoull(arg, &p, 0);
 697                         if (*p) {
 698                                 fprintf(stderr, "%s",
 699                                         _("Invalid readahead buffer size.\n"));
 700                                 extended_usage++;
 701                                 continue;
 702                         }
 703                         ctx->readahead_kb = reada_kb;
 704                 } else if (strcmp(token, "fragcheck") == 0) {
 705                         ctx->options |= E2F_OPT_FRAGCHECK;
 706                         continue;
 707                 } else if (strcmp(token, "journal_only") == 0) {
 708                         if (arg) {
 709                                 extended_usage++;
 710                                 continue;
 711                         }
 712                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 713                 } else if (strcmp(token, "discard") == 0) {
 714                         ctx->options |= E2F_OPT_DISCARD;
 715                         continue;
 716                 } else if (strcmp(token, "nodiscard") == 0) {
 717                         ctx->options &= ~E2F_OPT_DISCARD;
 718                         continue;
 719                 } else if (strcmp(token, "optimize_extents") == 0) {
 720                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 721                         continue;
 722                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 723                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 724                         continue;
 725                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 726                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 727                         continue;
 728                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 729                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 730                         continue;
 731                 } else if (strcmp(token, "log_filename") == 0) {
 732                         if (!arg)
 733                                 extended_usage++;
 734                         else
 735                                 ctx->log_fn = string_copy(ctx, arg, 0);
 736                         continue;
 737                 } else if (strcmp(token, "bmap2extent") == 0) {
 738                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 739                         continue;
 740                 } else if (strcmp(token, "fixes_only") == 0) {
 741                         ctx->options |= E2F_OPT_FIXES_ONLY;
 742                         continue;
 743                 } else if (strcmp(token, "unshare_blocks") == 0) {
 744                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 745                         ctx->options |= E2F_OPT_FORCE;
 746                         continue;
 747                 } else {
 748                         fprintf(stderr, _("Unknown extended option: %s\n"),
 749                                 token);
 750                         extended_usage++;
 751                 }
 752         }
 753         free(buf);
 754
 755         if (extended_usage) {
 756                 fputs(_("\nExtended options are separated by commas, "
 757                        "and may take an argument which\n"
 758                        "is set off by an equals ('=') sign.  "
 759                        "Valid extended options are:\n\n"), stderr);
 760                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 761                 fputs("\tfragcheck\n", stderr);
 762                 fputs("\tjournal_only\n", stderr);
 763                 fputs("\tdiscard\n", stderr);
 764                 fputs("\tnodiscard\n", stderr);
 765                 fputs("\toptimize_extents\n", stderr);
 766                 fputs("\tno_optimize_extents\n", stderr);
 767                 fputs("\tinode_count_fullmap\n", stderr);
 768                 fputs("\tno_inode_count_fullmap\n", stderr);
 769                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 770                 fputs("\tbmap2extent\n", stderr);
 771                 fputs("\tunshare_blocks\n", stderr);
 772                 fputs("\tfixes_only\n", stderr);
 773                 fputc('\n', stderr);
 774                 exit(1);
 775         }
 776 }
 777
 778 static void syntax_err_report(const char *filename, long err, int line_num)
 779 {
 780         fprintf(stderr,
 781                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 782                 filename, line_num, error_message(err));
 783         exit(FSCK_ERROR);
 784 }
 785
 786 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 787
 788 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 789 {
 790         int             flush = 0;
 791         int             c, fd;
 792 #ifdef MTRACE
 793         extern void     *mallwatch;
 794 #endif
 795         e2fsck_t        ctx;
 796         errcode_t       retval;
 797 #ifdef HAVE_SIGNAL_H
 798         struct sigaction        sa;
 799 #endif
 800         char            *extended_opts = 0;
 801         char            *cp;
 802         int             res;            /* result of sscanf */
 803 #ifdef CONFIG_JBD_DEBUG
 804         char            *jbd_debug;
 805 #endif
 806         unsigned long long phys_mem_kb;
 807
 808         retval = e2fsck_allocate_context(&ctx);
 809         if (retval)
 810                 return retval;
 811
 812         *ret_ctx = ctx;
 813         e2fsck_global_ctx = ctx;
 814
 815         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 816         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 817         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 818                 ctx->interactive = 1;
 819         } else {
 820                 ctx->start_meta[0] = '\001';
 821                 ctx->stop_meta[0] = '\002';
 822         }
 823         memset(bar, '=', sizeof(bar)-1);
 824         memset(spaces, ' ', sizeof(spaces)-1);
 825         add_error_table(&et_ext2_error_table);
 826         add_error_table(&et_prof_error_table);
 827         blkid_get_cache(&ctx->blkid, NULL);
 828
 829         if (argc && *argv)
 830                 ctx->program_name = *argv;
 831         else
 832                 ctx->program_name = "e2fsck";
 833
 834         phys_mem_kb = get_memory_size() / 1024;
 835         ctx->readahead_kb = ~0ULL;
 836         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 837                 switch (c) {
 838                 case 'C':
 839                         ctx->progress = e2fsck_update_progress;
 840                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 841                         if (res != 1)
 842                                 goto sscanf_err;
 843
 844                         if (ctx->progress_fd < 0) {
 845                                 ctx->progress = 0;
 846                                 ctx->progress_fd = ctx->progress_fd * -1;
 847                         }
 848                         if (!ctx->progress_fd)
 849                                 break;
 850                         /* Validate the file descriptor to avoid disasters */
 851                         fd = dup(ctx->progress_fd);
 852                         if (fd < 0) {
 853                                 fprintf(stderr,
 854                                 _("Error validating file descriptor %d: %s\n"),
 855                                         ctx->progress_fd,
 856                                         error_message(errno));
 857                                 fatal_error(ctx,
 858                         _("Invalid completion information file descriptor"));
 859                         } else
 860                                 close(fd);
 861                         break;
 862                 case 'D':
 863                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 864                         break;
 865                 case 'E':
 866                         extended_opts = optarg;
 867                         break;
 868                 case 'p':
 869                 case 'a':
 870                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 871                         conflict_opt:
 872                                 fatal_error(ctx,
 873         _("Only one of the options -p/-a, -n or -y may be specified."));
 874                         }
 875                         ctx->options |= E2F_OPT_PREEN;
 876                         break;
 877                 case 'n':
 878                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 879                                 goto conflict_opt;
 880                         ctx->options |= E2F_OPT_NO;
 881                         break;
 882                 case 'y':
 883                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 884                                 goto conflict_opt;
 885                         ctx->options |= E2F_OPT_YES;
 886                         break;
 887                 case 't':
 888 #ifdef RESOURCE_TRACK
 889                         if (ctx->options & E2F_OPT_TIME)
 890                                 ctx->options |= E2F_OPT_TIME2;
 891                         else
 892                                 ctx->options |= E2F_OPT_TIME;
 893 #else
 894                         fprintf(stderr, _("The -t option is not "
 895                                 "supported on this version of e2fsck.\n"));
 896 #endif
 897                         break;
 898                 case 'c':
 899                         if (cflag++)
 900                                 ctx->options |= E2F_OPT_WRITECHECK;
 901                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 902                         break;
 903                 case 'r':
 904                         /* What we do by default, anyway! */
 905                         break;
 906                 case 'b':
 907                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
 908                         if (res != 1)
 909                                 goto sscanf_err;
 910                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 911                         break;
 912                 case 'B':
 913                         ctx->blocksize = atoi(optarg);
 914                         break;
 915                 case 'I':
 916                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 917                         if (res != 1)
 918                                 goto sscanf_err;
 919                         break;
 920                 case 'j':
 921                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 922                                                               optarg, NULL);
 923                         if (!ctx->journal_name) {
 924                                 com_err(ctx->program_name, 0,
 925                                         _("Unable to resolve '%s'"),
 926                                         optarg);
 927                                 fatal_error(ctx, 0);
 928                         }
 929                         break;
 930                 case 'P':
 931                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 932                         if (res != 1)
 933                                 goto sscanf_err;
 934                         break;
 935                 case 'L':
 936                         replace_bad_blocks++;
 937                 case 'l':
 938                         if (bad_blocks_file)
 939                                 free(bad_blocks_file);
 940                         bad_blocks_file = string_copy(ctx, optarg, 0);
 941                         break;
 942                 case 'd':
 943                         ctx->options |= E2F_OPT_DEBUG;
 944                         break;
 945                 case 'f':
 946                         ctx->options |= E2F_OPT_FORCE;
 947                         break;
 948                 case 'F':
 949                         flush = 1;
 950                         break;
 951                 case 'v':
 952                         verbose = 1;
 953                         break;
 954                 case 'V':
 955                         show_version_only = 1;
 956                         break;
 957 #ifdef MTRACE
 958                 case 'M':
 959                         mallwatch = (void *) strtol(optarg, NULL, 0);
 960                         break;
 961 #endif
 962                 case 'N':
 963                         ctx->device_name = string_copy(ctx, optarg, 0);
 964                         break;
 965                 case 'k':
 966                         keep_bad_blocks++;
 967                         break;
 968                 case 'z':
 969                         ctx->undo_file = optarg;
 970                         break;
 971                 default:
 972                         usage(ctx);
 973                 }
 974         if (show_version_only)
 975                 return 0;
 976         if (optind != argc - 1)
 977                 usage(ctx);
 978         if ((ctx->options & E2F_OPT_NO) &&
 979             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
 980                 com_err(ctx->program_name, 0, "%s",
 981                         _("The -n and -D options are incompatible."));
 982                 fatal_error(ctx, 0);
 983         }
 984         if ((ctx->options & E2F_OPT_NO) && cflag) {
 985                 com_err(ctx->program_name, 0, "%s",
 986                         _("The -n and -c options are incompatible."));
 987                 fatal_error(ctx, 0);
 988         }
 989         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
 990                 com_err(ctx->program_name, 0, "%s",
 991                         _("The -n and -l/-L options are incompatible."));
 992                 fatal_error(ctx, 0);
 993         }
 994         if (ctx->options & E2F_OPT_NO)
 995                 ctx->options |= E2F_OPT_READONLY;
 996
 997         ctx->io_options = strchr(argv[optind], '?');
 998         if (ctx->io_options)
 999                 *ctx->io_options++ = 0;
1000         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
1001         if (!ctx->filesystem_name) {
1002                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1003                         argv[optind]);
1004                 fatal_error(ctx, 0);
1005         }
1006         if (extended_opts)
1007                 parse_extended_opts(ctx, extended_opts);
1008
1009         /* Complain about mutually exclusive rebuilding activities */
1010         if (getenv("E2FSCK_FIXES_ONLY"))
1011                 ctx->options |= E2F_OPT_FIXES_ONLY;
1012         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1013             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1014                 com_err(ctx->program_name, 0, "%s",
1015                         _("The -D and -E fixes_only options are incompatible."));
1016                 fatal_error(ctx, 0);
1017         }
1018         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1019             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1020                 com_err(ctx->program_name, 0, "%s",
1021                         _("The -E bmap2extent and fixes_only options are incompatible."));
1022                 fatal_error(ctx, 0);
1023         }
1024
1025         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
1026                 config_fn[0] = cp;
1027         profile_set_syntax_err_cb(syntax_err_report);
1028         profile_init(config_fn, &ctx->profile);
1029
1030         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1031                             &c);
1032         if (c)
1033                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1034         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1035                             &c);
1036         if (c)
1037                 verbose = 1;
1038
1039         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1040                             0, 0, &c);
1041         if (c)
1042                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1043
1044         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1045                             0, 0, &c);
1046         if (c)
1047                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1048
1049         if (ctx->readahead_kb == ~0ULL) {
1050                 profile_get_integer(ctx->profile, "options",
1051                                     "readahead_mem_pct", 0, -1, &c);
1052                 if (c >= 0 && c <= 100)
1053                         ctx->readahead_kb = phys_mem_kb * c / 100;
1054                 profile_get_integer(ctx->profile, "options",
1055                                     "readahead_kb", 0, -1, &c);
1056                 if (c >= 0)
1057                         ctx->readahead_kb = c;
1058                 if (ctx->readahead_kb != ~0ULL &&
1059                     ctx->readahead_kb > phys_mem_kb)
1060                         ctx->readahead_kb = phys_mem_kb;
1061         }
1062
1063         /* Turn off discard in read-only mode */
1064         if ((ctx->options & E2F_OPT_NO) &&
1065             (ctx->options & E2F_OPT_DISCARD))
1066                 ctx->options &= ~E2F_OPT_DISCARD;
1067
1068         if (flush) {
1069                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1070                 if (fd < 0) {
1071                         com_err("open", errno,
1072                                 _("while opening %s for flushing"),
1073                                 ctx->filesystem_name);
1074                         fatal_error(ctx, 0);
1075                 }
1076                 if ((retval = ext2fs_sync_device(fd, 1))) {
1077                         com_err("ext2fs_sync_device", retval,
1078                                 _("while trying to flush %s"),
1079                                 ctx->filesystem_name);
1080                         fatal_error(ctx, 0);
1081                 }
1082                 close(fd);
1083         }
1084         if (cflag && bad_blocks_file) {
1085                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1086                                         "be both used at the same time.\n"));
1087                 exit(FSCK_USAGE);
1088         }
1089 #ifdef HAVE_SIGNAL_H
1090         /*
1091          * Set up signal action
1092          */
1093         memset(&sa, 0, sizeof(struct sigaction));
1094         sa.sa_handler = signal_cancel;
1095         sigaction(SIGINT, &sa, 0);
1096         sigaction(SIGTERM, &sa, 0);
1097 #ifdef SA_RESTART
1098         sa.sa_flags = SA_RESTART;
1099 #endif
1100         sa.sa_handler = signal_progress_on;
1101         sigaction(SIGUSR1, &sa, 0);
1102         sa.sa_handler = signal_progress_off;
1103         sigaction(SIGUSR2, &sa, 0);
1104 #endif
1105
1106         /* Update our PATH to include /sbin if we need to run badblocks  */
1107         if (cflag) {
1108                 char *oldpath = getenv("PATH");
1109                 char *newpath;
1110                 int len = sizeof(PATH_SET) + 1;
1111
1112                 if (oldpath)
1113                         len += strlen(oldpath);
1114
1115                 newpath = malloc(len);
1116                 if (!newpath)
1117                         fatal_error(ctx, "Couldn't malloc() newpath");
1118                 strcpy(newpath, PATH_SET);
1119
1120                 if (oldpath) {
1121                         strcat(newpath, ":");
1122                         strcat(newpath, oldpath);
1123                 }
1124                 putenv(newpath);
1125         }
1126 #ifdef CONFIG_JBD_DEBUG
1127         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1128         if (jbd_debug) {
1129                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1130                 if (res != 1) {
1131                         fprintf(stderr,
1132                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1133                                 jbd_debug);
1134                         exit (1);
1135                 }
1136         }
1137 #endif
1138         return 0;
1139
1140 sscanf_err:
1141         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1142                 c, optarg);
1143         exit (1);
1144 }
1145
1146 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1147                              ext2_filsys *ret_fs)
1148 {
1149         errcode_t retval;
1150
1151         *ret_fs = NULL;
1152         if (ctx->superblock && ctx->blocksize) {
1153                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1154                                       flags, ctx->superblock, ctx->blocksize,
1155                                       io_ptr, ret_fs);
1156         } else if (ctx->superblock) {
1157                 int blocksize;
1158                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1159                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1160                         if (*ret_fs) {
1161                                 ext2fs_free(*ret_fs);
1162                                 *ret_fs = NULL;
1163                         }
1164                         retval = ext2fs_open2(ctx->filesystem_name,
1165                                               ctx->io_options, flags,
1166                                               ctx->superblock, blocksize,
1167                                               io_ptr, ret_fs);
1168                         if (!retval)
1169                                 break;
1170                 }
1171         } else
1172                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1173                                       flags, 0, 0, io_ptr, ret_fs);
1174
1175         if (retval == 0) {
1176                 (*ret_fs)->priv_data = ctx;
1177                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1178                                        "default", NULL);
1179         }
1180         return retval;
1181 }
1182
1183 static const char *my_ver_string = E2FSPROGS_VERSION;
1184 static const char *my_ver_date = E2FSPROGS_DATE;
1185
1186 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1187 {
1188         struct mmp_struct *mmp_s;
1189         unsigned int mmp_check_interval;
1190         errcode_t retval = 0;
1191         struct problem_context pctx;
1192         unsigned int wait_time = 0;
1193
1194         clear_problem_context(&pctx);
1195         if (fs->mmp_buf == NULL) {
1196                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1197                 if (retval)
1198                         goto check_error;
1199         }
1200
1201         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1202         if (retval)
1203                 goto check_error;
1204
1205         mmp_s = fs->mmp_buf;
1206
1207         mmp_check_interval = fs->super->s_mmp_update_interval;
1208         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1209                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1210
1211         /*
1212          * If check_interval in MMP block is larger, use that instead of
1213          * check_interval from the superblock.
1214          */
1215         if (mmp_s->mmp_check_interval > mmp_check_interval)
1216                 mmp_check_interval = mmp_s->mmp_check_interval;
1217
1218         wait_time = mmp_check_interval * 2 + 1;
1219
1220         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1221                 retval = 0;
1222         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1223                 retval = EXT2_ET_MMP_FSCK_ON;
1224         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1225                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1226
1227         if (retval)
1228                 goto check_error;
1229
1230         /* Print warning if e2fsck will wait for more than 20 secs. */
1231         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1232                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1233                                "time is %u seconds. Please wait...\n"),
1234                         mmp_check_interval, wait_time * 2);
1235         }
1236
1237         return 0;
1238
1239 check_error:
1240
1241         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1242                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1243                         fs->super->s_mmp_block = 0;
1244                         ext2fs_mark_super_dirty(fs);
1245                         retval = 0;
1246                 }
1247         } else if (retval == EXT2_ET_MMP_FAILED) {
1248                 com_err(ctx->program_name, retval, "%s",
1249                         _("while checking MMP block"));
1250                 dump_mmp_msg(fs->mmp_buf, NULL);
1251         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1252                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1253                 com_err(ctx->program_name, retval, "%s",
1254                         _("while checking MMP block"));
1255                 dump_mmp_msg(fs->mmp_buf,
1256                              _("If you are sure the filesystem is not "
1257                                "in use on any node, run:\n"
1258                                "'tune2fs -f -E clear_mmp {device}'\n"));
1259         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1260                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1261                         ext2fs_mmp_clear(fs);
1262                         retval = 0;
1263                 }
1264         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1265                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1266                         ext2fs_mmp_clear(fs);
1267                         retval = 0;
1268                 }
1269         } else
1270                 com_err(ctx->program_name, retval, "%s",
1271                         _("while reading MMP block"));
1272         return retval;
1273 }
1274
1275 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1276 {
1277         errcode_t retval = ENOMEM;
1278         char *tdb_dir = NULL, *tdb_file = NULL;
1279         char *dev_name, *tmp_name;
1280         int free_tdb_dir = 0;
1281
1282         /* (re)open a specific undo file */
1283         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1284                 retval = set_undo_io_backing_manager(*io_ptr);
1285                 if (retval)
1286                         goto err;
1287                 *io_ptr = undo_io_manager;
1288                 retval = set_undo_io_backup_file(ctx->undo_file);
1289                 if (retval)
1290                         goto err;
1291                 printf(_("Overwriting existing filesystem; this can be undone "
1292                          "using the command:\n"
1293                          "    e2undo %s %s\n\n"),
1294                         ctx->undo_file, ctx->filesystem_name);
1295                 return retval;
1296         }
1297
1298         /*
1299          * Configuration via a conf file would be
1300          * nice
1301          */
1302         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1303         if (!tdb_dir) {
1304                 profile_get_string(ctx->profile, "defaults",
1305                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1306                                    &tdb_dir);
1307                 free_tdb_dir = 1;
1308         }
1309
1310         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1311             access(tdb_dir, W_OK)) {
1312                 if (free_tdb_dir)
1313                         free(tdb_dir);
1314                 return 0;
1315         }
1316
1317         tmp_name = strdup(ctx->filesystem_name);
1318         if (!tmp_name)
1319                 goto errout;
1320         dev_name = basename(tmp_name);
1321         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1322         if (!tdb_file) {
1323                 free(tmp_name);
1324                 goto errout;
1325         }
1326         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1327         free(tmp_name);
1328
1329         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1330                 retval = errno;
1331                 com_err(ctx->program_name, retval,
1332                         _("while trying to delete %s"), tdb_file);
1333                 goto errout;
1334         }
1335
1336         retval = set_undo_io_backing_manager(*io_ptr);
1337         if (retval)
1338                 goto errout;
1339         *io_ptr = undo_io_manager;
1340         retval = set_undo_io_backup_file(tdb_file);
1341         if (retval)
1342                 goto errout;
1343         printf(_("Overwriting existing filesystem; this can be undone "
1344                  "using the command:\n"
1345                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1346
1347         if (free_tdb_dir)
1348                 free(tdb_dir);
1349         free(tdb_file);
1350         return 0;
1351
1352 errout:
1353         if (free_tdb_dir)
1354                 free(tdb_dir);
1355         free(tdb_file);
1356 err:
1357         com_err(ctx->program_name, retval, "%s",
1358                 _("while trying to setup undo file\n"));
1359         return retval;
1360 }
1361
1362 int main (int argc, char *argv[])
1363 {
1364         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1365         int             exit_value = FSCK_OK;
1366         ext2_filsys     fs = 0;
1367         io_manager      io_ptr;
1368         struct ext2_super_block *sb;
1369         const char      *lib_ver_date;
1370         int             my_ver, lib_ver;
1371         e2fsck_t        ctx;
1372         blk64_t         orig_superblock = ~(blk64_t)0;
1373         struct problem_context pctx;
1374         int flags, run_result, was_changed;
1375         int journal_size;
1376         int sysval, sys_page_size = 4096;
1377         int old_bitmaps;
1378         __u32 features[3];
1379         char *cp;
1380         enum quota_type qtype;
1381
1382         clear_problem_context(&pctx);
1383         sigcatcher_setup();
1384 #ifdef MTRACE
1385         mtrace();
1386 #endif
1387 #ifdef MCHECK
1388         mcheck(0);
1389 #endif
1390 #ifdef ENABLE_NLS
1391         setlocale(LC_MESSAGES, "");
1392         setlocale(LC_CTYPE, "");
1393         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1394         textdomain(NLS_CAT_NAME);
1395         set_com_err_gettext(gettext);
1396 #endif
1397         my_ver = ext2fs_parse_version_string(my_ver_string);
1398         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1399         if (my_ver > lib_ver) {
1400                 fprintf( stderr, "%s",
1401                          _("Error: ext2fs library version out of date!\n"));
1402                 show_version_only++;
1403         }
1404
1405         retval = PRS(argc, argv, &ctx);
1406         if (retval) {
1407                 com_err("e2fsck", retval, "%s",
1408                         _("while trying to initialize program"));
1409                 exit(FSCK_ERROR);
1410         }
1411         reserve_stdio_fds();
1412
1413         set_up_logging(ctx);
1414         if (ctx->logf) {
1415                 int i;
1416                 fputs("E2fsck run: ", ctx->logf);
1417                 for (i = 0; i < argc; i++) {
1418                         if (i)
1419                                 fputc(' ', ctx->logf);
1420                         fputs(argv[i], ctx->logf);
1421                 }
1422                 fputc('\n', ctx->logf);
1423         }
1424
1425         init_resource_track(&ctx->global_rtrack, NULL);
1426         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1427                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1428                          my_ver_date);
1429
1430         if (show_version_only) {
1431                 log_err(ctx, _("\tUsing %s, %s\n"),
1432                         error_message(EXT2_ET_BASE), lib_ver_date);
1433                 exit(FSCK_OK);
1434         }
1435
1436         check_mount(ctx);
1437
1438         if (!(ctx->options & E2F_OPT_PREEN) &&
1439             !(ctx->options & E2F_OPT_NO) &&
1440             !(ctx->options & E2F_OPT_YES)) {
1441                 if (!ctx->interactive)
1442                         fatal_error(ctx,
1443                                     _("need terminal for interactive repairs"));
1444         }
1445         ctx->superblock = ctx->use_superblock;
1446
1447         flags = EXT2_FLAG_SKIP_MMP;
1448 restart:
1449 #ifdef CONFIG_TESTIO_DEBUG
1450         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1451                 io_ptr = test_io_manager;
1452                 test_io_backing_manager = unix_io_manager;
1453         } else
1454 #endif
1455                 io_ptr = unix_io_manager;
1456         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1457         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1458                             &old_bitmaps);
1459         if (!old_bitmaps)
1460                 flags |= EXT2_FLAG_64BITS;
1461         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1462                 flags |= EXT2_FLAG_RW;
1463                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1464                       ctx->mount_flags & EXT2_MF_READONLY))
1465                         flags |= EXT2_FLAG_EXCLUSIVE;
1466                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1467                     (ctx->options & E2F_OPT_FORCE))
1468                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1469         }
1470
1471         if (ctx->undo_file) {
1472                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1473                 if (retval)
1474                         exit(FSCK_ERROR);
1475         }
1476
1477         ctx->openfs_flags = flags;
1478         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1479
1480         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1481             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1482             ((retval == EXT2_ET_BAD_MAGIC) ||
1483              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1484              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1485              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1486                 if (retval) {
1487                         pctx.errcode = retval;
1488                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1489                 }
1490                 if (retval2) {
1491                         pctx.errcode = retval2;
1492                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1493                 }
1494                 pctx.errcode = 0;
1495                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1496                         retval = retval2;
1497                         goto failure;
1498                 }
1499                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1500                         ext2fs_free(fs);
1501                         fs = NULL;
1502                 }
1503                 if (!fs || (fs->group_desc_count > 1)) {
1504                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1505                                 ctx->program_name,
1506                                 retval ? _("Superblock invalid,") :
1507                                 _("Group descriptors look bad..."));
1508                         orig_superblock = ctx->superblock;
1509                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1510                         if (fs)
1511                                 ext2fs_close_free(&fs);
1512                         orig_retval = retval;
1513                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1514                         if ((orig_retval == 0) && retval != 0) {
1515                                 if (fs)
1516                                         ext2fs_close_free(&fs);
1517                                 log_out(ctx, _("%s: %s while using the "
1518                                                "backup blocks"),
1519                                         ctx->program_name,
1520                                         error_message(retval));
1521                                 log_out(ctx, _("%s: going back to original "
1522                                                "superblock\n"),
1523                                         ctx->program_name);
1524                                 ctx->superblock = orig_superblock;
1525                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1526                         }
1527                 }
1528         }
1529         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1530              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1531             fs && fs->super) {
1532                 sb = fs->super;
1533                 features[0] = (sb->s_feature_compat &
1534                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1535                 features[1] = (sb->s_feature_incompat &
1536                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1537                 features[2] = (sb->s_feature_ro_compat &
1538                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1539                 if (features[0] || features[1] || features[2])
1540                         goto print_unsupp_features;
1541         }
1542 failure:
1543         if (retval) {
1544                 if (orig_retval)
1545                         retval = orig_retval;
1546                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1547                         ctx->filesystem_name);
1548                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1549                         log_out(ctx, "%s",
1550                                 _("The filesystem revision is apparently "
1551                                   "too high for this version of e2fsck.\n"
1552                                   "(Or the filesystem superblock "
1553                                   "is corrupt)\n\n"));
1554                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1555                 } else if (retval == EXT2_ET_SHORT_READ)
1556                         log_out(ctx, "%s",
1557                                 _("Could this be a zero-length partition?\n"));
1558                 else if ((retval == EPERM) || (retval == EACCES))
1559                         log_out(ctx, _("You must have %s access to the "
1560                                        "filesystem or be root\n"),
1561                                (ctx->options & E2F_OPT_READONLY) ?
1562                                "r/o" : "r/w");
1563                 else if (retval == ENXIO)
1564                         log_out(ctx, "%s",
1565                                 _("Possibly non-existent or swap device?\n"));
1566                 else if (retval == EBUSY)
1567                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1568                                          "exclusively by another program?\n"));
1569                 else if (retval == ENOENT)
1570                         log_out(ctx, "%s",
1571                                 _("Possibly non-existent device?\n"));
1572 #ifdef EROFS
1573                 else if (retval == EROFS)
1574                         log_out(ctx, "%s", _("Disk write-protected; use the "
1575                                              "-n option to do a read-only\n"
1576                                              "check of the device.\n"));
1577 #endif
1578                 else {
1579                         /*
1580                          * Let's try once more will less consistency checking
1581                          * so that we are able to recover from more errors
1582                          * (e.g. some tool messing up some value in the sb).
1583                          */
1584                         if (!(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1585                                 if (fs)
1586                                         ext2fs_close_free(&fs);
1587                                 log_out(ctx, _("%s: Trying to load superblock "
1588                                         "despite errors...\n"),
1589                                         ctx->program_name);
1590                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1591                                 /*
1592                                  * If we tried backup sb, revert to the
1593                                  * original one now.
1594                                  */
1595                                 if (orig_superblock != ~(blk64_t)0)
1596                                         ctx->superblock = orig_superblock;
1597                                 goto restart;
1598                         }
1599                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1600                         if (retval == EXT2_ET_BAD_MAGIC)
1601                                 check_plausibility(ctx->filesystem_name,
1602                                                    CHECK_FS_EXIST, NULL);
1603                 }
1604                 fatal_error(ctx, 0);
1605         }
1606         /*
1607          * We only update the master superblock because (a) paranoia;
1608          * we don't want to corrupt the backup superblocks, and (b) we
1609          * don't need to update the mount count and last checked
1610          * fields in the backup superblock (the kernel doesn't update
1611          * the backup superblocks anyway).  With newer versions of the
1612          * library this flag is set by ext2fs_open2(), but we set this
1613          * here just to be sure.  (No, we don't support e2fsck running
1614          * with some other libext2fs than the one that it was shipped
1615          * with, but just in case....)
1616          */
1617         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1618
1619         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1620                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1621                 int need_restart = 0;
1622
1623                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1624                                                        blocksize,
1625                                                        &ctx->num_blocks);
1626                 /*
1627                  * The floppy driver refuses to allow anyone else to
1628                  * open the device if has been opened with O_EXCL;
1629                  * this is unlike other block device drivers in Linux.
1630                  * To handle this, we close the filesystem and then
1631                  * reopen the filesystem after we get the device size.
1632                  */
1633                 if (pctx.errcode == EBUSY) {
1634                         ext2fs_close_free(&fs);
1635                         need_restart++;
1636                         pctx.errcode =
1637                                 ext2fs_get_device_size2(ctx->filesystem_name,
1638                                                         blocksize,
1639                                                         &ctx->num_blocks);
1640                 }
1641                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1642                         ctx->num_blocks = 0;
1643                 else if (pctx.errcode) {
1644                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1645                         ctx->flags |= E2F_FLAG_ABORT;
1646                         fatal_error(ctx, 0);
1647                 }
1648                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1649                 if (need_restart)
1650                         goto restart;
1651         }
1652
1653         ctx->fs = fs;
1654         fs->now = ctx->now;
1655         sb = fs->super;
1656
1657         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1658                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1659                         _("while trying to open %s"),
1660                         ctx->filesystem_name);
1661         get_newer:
1662                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1663         }
1664
1665         /*
1666          * Set the device name, which is used whenever we print error
1667          * or informational messages to the user.
1668          */
1669         if (ctx->device_name == 0 &&
1670             (sb->s_volume_name[0] != 0)) {
1671                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1672                                                sizeof(sb->s_volume_name));
1673         }
1674         if (ctx->device_name == 0)
1675                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1676         for (cp = ctx->device_name; *cp; cp++)
1677                 if (isspace(*cp) || *cp == ':')
1678                         *cp = '_';
1679
1680         ehandler_init(fs->io);
1681
1682         if (ext2fs_has_feature_mmp(fs->super) &&
1683             (flags & EXT2_FLAG_SKIP_MMP)) {
1684                 if (e2fsck_check_mmp(fs, ctx))
1685                         fatal_error(ctx, 0);
1686
1687                 /*
1688                  * Restart in order to reopen fs but this time start mmp.
1689                  */
1690                 ext2fs_close_free(&ctx->fs);
1691                 flags &= ~EXT2_FLAG_SKIP_MMP;
1692                 goto restart;
1693         }
1694
1695         if (ctx->logf)
1696                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1697                         e2p_uuid2str(sb->s_uuid));
1698
1699         /*
1700          * Make sure the ext3 superblock fields are consistent.
1701          */
1702         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1703                 retval = e2fsck_check_ext3_journal(ctx);
1704                 if (retval) {
1705                         com_err(ctx->program_name, retval,
1706                                 _("while checking journal for %s"),
1707                                 ctx->device_name);
1708                         fatal_error(ctx,
1709                                 _("Cannot proceed with file system check"));
1710                 }
1711         }
1712
1713         /*
1714          * Check to see if we need to do ext3-style recovery.  If so,
1715          * do it, and then restart the fsck.
1716          */
1717         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1718                 if (ctx->options & E2F_OPT_READONLY) {
1719                         log_out(ctx, "%s",
1720                                 _("Warning: skipping journal recovery because "
1721                                   "doing a read-only filesystem check.\n"));
1722                         io_channel_flush(ctx->fs->io);
1723                 } else {
1724                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1725                                 /*
1726                                  * Whoops, we attempted to run the
1727                                  * journal twice.  This should never
1728                                  * happen, unless the hardware or
1729                                  * device driver is being bogus.
1730                                  */
1731                                 com_err(ctx->program_name, 0,
1732                                         _("unable to set superblock flags "
1733                                           "on %s\n"), ctx->device_name);
1734                                 fatal_error(ctx, 0);
1735                         }
1736                         retval = e2fsck_run_ext3_journal(ctx);
1737                         if (retval == EFSBADCRC) {
1738                                 log_out(ctx, _("Journal checksum error "
1739                                                "found in %s\n"),
1740                                         ctx->device_name);
1741                         } else if (retval == EFSCORRUPTED) {
1742                                 log_out(ctx, _("Journal corrupted in %s\n"),
1743                                         ctx->device_name);
1744                         } else if (retval) {
1745                                 com_err(ctx->program_name, retval,
1746                                 _("while recovering journal of %s"),
1747                                         ctx->device_name);
1748                         }
1749                         ext2fs_close_free(&ctx->fs);
1750                         ctx->flags |= E2F_FLAG_RESTARTED;
1751                         goto restart;
1752                 }
1753         }
1754
1755         /*
1756          * Check for compatibility with the feature sets.  We need to
1757          * be more stringent than ext2fs_open().
1758          */
1759         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1760         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1761         features[2] = (sb->s_feature_ro_compat &
1762                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1763 print_unsupp_features:
1764         if (features[0] || features[1] || features[2]) {
1765                 int     i, j;
1766                 __u32   *mask = features, m;
1767
1768                 log_err(ctx, _("%s has unsupported feature(s):"),
1769                         ctx->filesystem_name);
1770
1771                 for (i=0; i <3; i++,mask++) {
1772                         for (j=0,m=1; j < 32; j++, m<<=1) {
1773                                 if (*mask & m)
1774                                         log_err(ctx, " %s",
1775                                                 e2p_feature2string(i, m));
1776                         }
1777                 }
1778                 log_err(ctx, "\n");
1779                 goto get_newer;
1780         }
1781
1782         /*
1783          * If the user specified a specific superblock, presumably the
1784          * master superblock has been trashed.  So we mark the
1785          * superblock as dirty, so it can be written out.
1786          */
1787         if (ctx->superblock &&
1788             !(ctx->options & E2F_OPT_READONLY))
1789                 ext2fs_mark_super_dirty(fs);
1790
1791         /*
1792          * Calculate the number of filesystem blocks per pagesize.  If
1793          * fs->blocksize > page_size, set the number of blocks per
1794          * pagesize to 1 to avoid division by zero errors.
1795          */
1796 #ifdef _SC_PAGESIZE
1797         sysval = sysconf(_SC_PAGESIZE);
1798         if (sysval > 0)
1799                 sys_page_size = sysval;
1800 #endif /* _SC_PAGESIZE */
1801         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1802         if (ctx->blocks_per_page == 0)
1803                 ctx->blocks_per_page = 1;
1804
1805         if (ctx->superblock)
1806                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1807         ext2fs_mark_valid(fs);
1808         check_super_block(ctx);
1809         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1810                 fatal_error(ctx, 0);
1811         check_if_skip(ctx);
1812         check_resize_inode(ctx);
1813         if (bad_blocks_file)
1814                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1815         else if (cflag)
1816                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1817         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1818                 fatal_error(ctx, 0);
1819
1820         /*
1821          * Mark the system as valid, 'til proven otherwise
1822          */
1823         ext2fs_mark_valid(fs);
1824
1825         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1826         if (retval) {
1827                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1828                         ctx->program_name, error_message(retval));
1829                 preenhalt(ctx);
1830                 log_out(ctx, "%s", _("This doesn't bode well, "
1831                                      "but we'll try to go on...\n"));
1832         }
1833
1834         /*
1835          * Save the journal size in megabytes.
1836          * Try and use the journal size from the backup else let e2fsck
1837          * find the default journal size.
1838          */
1839         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1840                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1841                                (sb->s_jnl_blocks[16] >> 20);
1842         else
1843                 journal_size = -1;
1844
1845         if (ext2fs_has_feature_quota(sb)) {
1846                 /* Quotas were enabled. Do quota accounting during fsck. */
1847                 clear_problem_context(&pctx);
1848                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1849                 if (pctx.errcode) {
1850                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1851                         fatal_error(ctx, 0);
1852                 }
1853         }
1854
1855         run_result = e2fsck_run(ctx);
1856         e2fsck_clear_progbar(ctx);
1857
1858         if (!ctx->invalid_bitmaps &&
1859             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1860                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1861                         if (journal_size < 1024)
1862                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
1863                         if (journal_size < 0) {
1864                                 ext2fs_clear_feature_journal(fs->super);
1865                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1866                                 log_out(ctx, "%s: Couldn't determine "
1867                                         "journal size\n", ctx->program_name);
1868                                 goto no_journal;
1869                         }
1870                         log_out(ctx, _("Creating journal (%d blocks): "),
1871                                journal_size);
1872                         fflush(stdout);
1873                         retval = ext2fs_add_journal_inode(fs,
1874                                                           journal_size, 0);
1875                         if (retval) {
1876                                 log_out(ctx, "%s: while trying to create "
1877                                         "journal\n", error_message(retval));
1878                                 goto no_journal;
1879                         }
1880                         log_out(ctx, "%s", _(" Done.\n"));
1881                         log_out(ctx, "%s",
1882                                 _("\n*** journal has been regenerated ***\n"));
1883                 }
1884         }
1885 no_journal:
1886
1887         if (run_result & E2F_FLAG_ABORT) {
1888                 fatal_error(ctx, _("aborted"));
1889         } else if (run_result & E2F_FLAG_CANCEL) {
1890                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1891                         ctx->device_name : ctx->filesystem_name);
1892                 exit_value |= FSCK_CANCELED;
1893         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
1894                 int needs_writeout;
1895
1896                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1897                         if (*quota_sb_inump(sb, qtype) == 0)
1898                                 continue;
1899                         needs_writeout = 0;
1900                         pctx.num = qtype;
1901                         retval = quota_compare_and_update(ctx->qctx, qtype,
1902                                                           &needs_writeout);
1903                         if ((retval || needs_writeout) &&
1904                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
1905                                 pctx.errcode = quota_write_inode(ctx->qctx,
1906                                                                  1 << qtype);
1907                                 if (pctx.errcode)
1908                                         (void) fix_problem(ctx,
1909                                                 PR_6_WRITE_QUOTAS, &pctx);
1910                         }
1911                 }
1912                 quota_release_context(&ctx->qctx);
1913         }
1914
1915         if (run_result == E2F_FLAG_RESTART) {
1916                 log_out(ctx, "%s",
1917                         _("Restarting e2fsck from the beginning...\n"));
1918                 retval = e2fsck_reset_context(ctx);
1919                 if (retval) {
1920                         com_err(ctx->program_name, retval, "%s",
1921                                 _("while resetting context"));
1922                         fatal_error(ctx, 0);
1923                 }
1924                 ext2fs_close_free(&ctx->fs);
1925                 goto restart;
1926         }
1927
1928 #ifdef MTRACE
1929         mtrace_print("Cleanup");
1930 #endif
1931         was_changed = ext2fs_test_changed(fs);
1932         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
1933             !(ctx->options & E2F_OPT_READONLY)) {
1934                 if (ext2fs_test_valid(fs)) {
1935                         if (!(sb->s_state & EXT2_VALID_FS))
1936                                 exit_value |= FSCK_NONDESTRUCT;
1937                         sb->s_state = EXT2_VALID_FS;
1938                         if (check_backup_super_block(ctx))
1939                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1940                 } else
1941                         sb->s_state &= ~EXT2_VALID_FS;
1942                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
1943                         sb->s_lastcheck = ctx->now;
1944                 sb->s_mnt_count = 0;
1945                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
1946                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
1947                 if (pctx.errcode)
1948                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
1949                 ext2fs_mark_super_dirty(fs);
1950         }
1951
1952         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
1953             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
1954             (ctx->options & E2F_OPT_NO))
1955                 /* Don't try to write or flush I/O, we just wanted to know whether or
1956                  * not there were enough free blocks to undo deduplication.
1957                  */
1958                 goto skip_write;
1959
1960         if (!(ctx->options & E2F_OPT_READONLY)) {
1961                 e2fsck_write_bitmaps(ctx);
1962                 if (fs->flags & EXT2_FLAG_DIRTY) {
1963                         pctx.errcode = ext2fs_flush(ctx->fs);
1964                         if (pctx.errcode)
1965                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
1966                 }
1967                 pctx.errcode = io_channel_flush(ctx->fs->io);
1968                 if (pctx.errcode)
1969                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
1970         }
1971
1972         if (was_changed) {
1973                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
1974
1975                 if (fs_fixed)
1976                         exit_value |= FSCK_NONDESTRUCT;
1977                 if (!(ctx->options & E2F_OPT_PREEN)) {
1978 #if 0   /* Do this later; it breaks too many tests' golden outputs */
1979                         log_out(ctx, fs_fixed ?
1980                                 _("\n%s: ***** FILE SYSTEM ERRORS "
1981                                   "CORRECTED *****\n") :
1982                                 _("%s: File system was modified.\n"),
1983                                 ctx->device_name);
1984 #else
1985                         log_out(ctx,
1986                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1987                                 ctx->device_name);
1988 #endif
1989                 }
1990                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1991                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
1992                                 ctx->device_name);
1993                         exit_value |= FSCK_REBOOT;
1994                 }
1995         }
1996
1997 skip_write:
1998         if (!ext2fs_test_valid(fs) ||
1999             ((exit_value & FSCK_CANCELED) &&
2000              (sb->s_state & EXT2_ERROR_FS))) {
2001                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2002                                "errors **********\n\n"), ctx->device_name);
2003                 exit_value |= FSCK_UNCORRECTED;
2004                 exit_value &= ~FSCK_NONDESTRUCT;
2005         }
2006         if (exit_value & FSCK_CANCELED) {
2007                 int     allow_cancellation;
2008
2009                 profile_get_boolean(ctx->profile, "options",
2010                                     "allow_cancellation", 0, 0,
2011                                     &allow_cancellation);
2012                 exit_value &= ~FSCK_NONDESTRUCT;
2013                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2014                     (sb->s_state & EXT2_VALID_FS) &&
2015                     !(sb->s_state & EXT2_ERROR_FS))
2016                         exit_value = 0;
2017         } else
2018                 show_stats(ctx);
2019
2020         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2021
2022         ext2fs_close_free(&ctx->fs);
2023         free(ctx->journal_name);
2024
2025         if (ctx->logf)
2026                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2027         e2fsck_free_context(ctx);
2028         remove_error_table(&et_ext2_error_table);
2029         remove_error_table(&et_prof_error_table);
2030         return exit_value;
2031 }