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 "uuid/uuid.h"
  54 #include "support/plausible.h"
  55 #include "support/devname.h"
  56 #include "e2fsck.h"
  57 #include "problem.h"
  58 #include "jfs_user.h"
  59 #include "../version.h"
  60
  61 /* Command line options */
  62 static int cflag;               /* check disk */
  63 static int show_version_only;
  64 static int verbose;
  65
  66 static int replace_bad_blocks;
  67 static int keep_bad_blocks;
  68 static char *bad_blocks_file;
  69
  70 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  71
  72 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
  73 int journal_enable_debug = -1;
  74 #endif
  75
  76 static void usage(e2fsck_t ctx)
  77 {
  78         fprintf(stderr,
  79                 _("Usage: %s [-panyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  80                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  81                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  82                 ctx->program_name ? ctx->program_name : "e2fsck");
  83
  84         fprintf(stderr, "%s", _("\nEmergency help:\n"
  85                 " -p                   Automatic repair (no questions)\n"
  86                 " -n                   Make no changes to the filesystem\n"
  87                 " -y                   Assume \"yes\" to all questions\n"
  88                 " -c                   Check for bad blocks and add them to the badblock list\n"
  89                 " -f                   Force checking even if filesystem is marked clean\n"));
  90         fprintf(stderr, "%s", _(""
  91                 " -v                   Be verbose\n"
  92                 " -b superblock        Use alternative superblock\n"
  93                 " -B blocksize         Force blocksize when looking for superblock\n"
  94                 " -j external_journal  Set location of the external journal\n"
  95                 " -l bad_blocks_file   Add to badblocks list\n"
  96                 " -L bad_blocks_file   Set badblocks list\n"
  97                 " -z undo_file         Create an undo file\n"
  98                 ));
  99
 100         exit(FSCK_USAGE);
 101 }
 102
 103 static void show_stats(e2fsck_t ctx)
 104 {
 105         ext2_filsys fs = ctx->fs;
 106         ext2_ino_t inodes, inodes_used;
 107         blk64_t blocks, blocks_used;
 108         unsigned int dir_links;
 109         unsigned int num_files, num_links;
 110         __u32 *mask, m;
 111         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 112         int i, j, printed = 0;
 113
 114         dir_links = 2 * ctx->fs_directory_count - 1;
 115         num_files = ctx->fs_total_count - dir_links;
 116         num_links = ctx->fs_links_count - dir_links;
 117         inodes = fs->super->s_inodes_count;
 118         inodes_used = (fs->super->s_inodes_count -
 119                        fs->super->s_free_inodes_count);
 120         blocks = ext2fs_blocks_count(fs->super);
 121         blocks_used = (ext2fs_blocks_count(fs->super) -
 122                        ext2fs_free_blocks_count(fs->super));
 123
 124         if (inodes_used > 0) {
 125                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 126                 frag_percent_file = (frag_percent_file + 5) / 10;
 127
 128                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 129                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 130
 131                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 132                                                 ctx->fs_fragmented_dir))
 133                                       / inodes_used);
 134                 frag_percent_total = (frag_percent_total + 5) / 10;
 135         }
 136
 137         if (!verbose) {
 138                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 139                                "%llu/%llu blocks\n"),
 140                         ctx->device_name, inodes_used, inodes,
 141                         frag_percent_total / 10, frag_percent_total % 10,
 142                         (unsigned long long) blocks_used,
 143                         (unsigned long long) blocks);
 144                 return;
 145         }
 146         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 147                             &i);
 148         if (verbose && i) {
 149                 log_out(ctx, "\nFilesystem features:");
 150                 mask = &ctx->fs->super->s_feature_compat;
 151                 for (i = 0; i < 3; i++, mask++) {
 152                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 153                                 if (*mask & m) {
 154                                         log_out(ctx, " %s",
 155                                                 e2p_feature2string(i, m));
 156                                         printed++;
 157                                 }
 158                         }
 159                 }
 160                 if (printed == 0)
 161                         log_out(ctx, " (none)");
 162                 log_out(ctx, "\n");
 163         }
 164
 165         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 166                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 167                         inodes_used), inodes_used,
 168                 100.0 * inodes_used / inodes, inodes);
 169         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 170                         "%12u non-contiguous files (%0d.%d%%)\n",
 171                         ctx->fs_fragmented),
 172                 ctx->fs_fragmented, frag_percent_file / 10,
 173                 frag_percent_file % 10);
 174         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 175                         "%12u non-contiguous directories (%0d.%d%%)\n",
 176                         ctx->fs_fragmented_dir),
 177                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 178                 frag_percent_dir % 10);
 179         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 180                        "%u/%u/%u\n"),
 181                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 182
 183         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 184                 if (ctx->extent_depth_count[j])
 185                         break;
 186         if (++j) {
 187                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 188                 for (i=0; i < j; i++) {
 189                         if (i)
 190                                 fputc('/', stdout);
 191                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 192                 }
 193                 log_out(ctx, "\n");
 194         }
 195
 196         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 197                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 198                    blocks_used),
 199                 (unsigned long long) blocks_used, 100.0 * blocks_used / blocks,
 200                 (unsigned long long) blocks);
 201         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 202                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 203         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 204                         ctx->large_files), ctx->large_files);
 205         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 206                         ctx->fs_regular_count), ctx->fs_regular_count);
 207         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 208                         ctx->fs_directory_count), ctx->fs_directory_count);
 209         log_out(ctx, P_("%12u character device file\n",
 210                         "%12u character device files\n", ctx->fs_chardev_count),
 211                 ctx->fs_chardev_count);
 212         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 213                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 214         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 215                 ctx->fs_fifo_count);
 216         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 217                 ctx->fs_links_count - dir_links);
 218         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 219                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 220         log_out(ctx, P_(" (%u fast symbolic link)\n",
 221                         " (%u fast symbolic links)\n",
 222                         ctx->fs_fast_symlinks_count),
 223                 ctx->fs_fast_symlinks_count);
 224         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 225                         ctx->fs_sockets_count),
 226                 ctx->fs_sockets_count);
 227         log_out(ctx, "------------\n");
 228         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 229                 num_files);
 230 }
 231
 232 static void check_mount(e2fsck_t ctx)
 233 {
 234         errcode_t       retval;
 235         int             cont;
 236
 237         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 238                                          &ctx->mount_flags);
 239         if (retval) {
 240                 com_err("ext2fs_check_if_mount", retval,
 241                         _("while determining whether %s is mounted."),
 242                         ctx->filesystem_name);
 243                 return;
 244         }
 245
 246         /*
 247          * If the filesystem isn't mounted, or it's the root
 248          * filesystem and it's mounted read-only, and we're not doing
 249          * a read/write check, then everything's fine.
 250          */
 251         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 252             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 253              (ctx->mount_flags & EXT2_MF_READONLY) &&
 254              !(ctx->options & E2F_OPT_WRITECHECK)))
 255                 return;
 256
 257         if (((ctx->options & E2F_OPT_READONLY) ||
 258              ((ctx->options & E2F_OPT_FORCE) &&
 259               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 260             !(ctx->options & E2F_OPT_WRITECHECK)) {
 261                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 262                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 263                                         ctx->filesystem_name);
 264                 else
 265                         log_out(ctx, _("Warning!  %s is in use.\n"),
 266                                         ctx->filesystem_name);
 267                 return;
 268         }
 269
 270         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 271                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 272         else
 273                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 274         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 275                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 276         puts("\007\007\007\007");
 277         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 278                        "The filesystem is mounted.   "
 279                        "If you continue you ***WILL***\n"
 280                        "cause ***SEVERE*** filesystem damage.\n\n"));
 281         puts("\007\007\007");
 282         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 283         if (!cont) {
 284                 printf("%s", _("check aborted.\n"));
 285                 exit (0);
 286         }
 287         return;
 288 }
 289
 290 static int is_on_batt(void)
 291 {
 292         FILE    *f;
 293         DIR     *d;
 294         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 295         unsigned int    acflag;
 296         struct dirent*  de;
 297
 298         f = fopen("/sys/class/power_supply/AC/online", "r");
 299         if (f) {
 300                 if (fscanf(f, "%u\n", &acflag) == 1) {
 301                         fclose(f);
 302                         return (!acflag);
 303                 }
 304                 fclose(f);
 305         }
 306         f = fopen("/proc/apm", "r");
 307         if (f) {
 308                 if (fscanf(f, "%79s %79s %79s %x", tmp, tmp, tmp, &acflag) != 4)
 309                         acflag = 1;
 310                 fclose(f);
 311                 return (acflag != 1);
 312         }
 313         d = opendir("/proc/acpi/ac_adapter");
 314         if (d) {
 315                 while ((de=readdir(d)) != NULL) {
 316                         if (!strncmp(".", de->d_name, 1))
 317                                 continue;
 318                         snprintf(fname, sizeof(fname),
 319                                  "/proc/acpi/ac_adapter/%s/state",
 320                                  de->d_name);
 321                         f = fopen(fname, "r");
 322                         if (!f)
 323                                 continue;
 324                         if (fscanf(f, "%79s %79s", tmp2, tmp) != 2)
 325                                 tmp[0] = 0;
 326                         fclose(f);
 327                         if (strncmp(tmp, "off-line", 8) == 0) {
 328                                 closedir(d);
 329                                 return 1;
 330                         }
 331                 }
 332                 closedir(d);
 333         }
 334         return 0;
 335 }
 336
 337 /*
 338  * This routine checks to see if a filesystem can be skipped; if so,
 339  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 340  * message explaining why a check is being forced.
 341  */
 342 static void check_if_skip(e2fsck_t ctx)
 343 {
 344         ext2_filsys fs = ctx->fs;
 345         struct problem_context pctx;
 346         const char *reason = NULL;
 347         unsigned int reason_arg = 0;
 348         long next_check;
 349         int batt = is_on_batt();
 350         int defer_check_on_battery;
 351         int broken_system_clock;
 352         time_t lastcheck;
 353
 354         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 355                 return;
 356
 357         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 358                             0, 0, &broken_system_clock);
 359         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 360                 broken_system_clock = 1;
 361         profile_get_boolean(ctx->profile, "options",
 362                             "defer_check_on_battery", 0, 1,
 363                             &defer_check_on_battery);
 364         if (!defer_check_on_battery)
 365                 batt = 0;
 366
 367         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 368                 return;
 369
 370         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 371                 goto skip;
 372
 373         lastcheck = fs->super->s_lastcheck;
 374         if (lastcheck > ctx->now)
 375                 lastcheck -= ctx->time_fudge;
 376         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 377             !ext2fs_test_valid(fs))
 378                 reason = _(" contains a file system with errors");
 379         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 380                 reason = _(" was not cleanly unmounted");
 381         else if (check_backup_super_block(ctx))
 382                 reason = _(" primary superblock features different from backup");
 383         else if ((fs->super->s_max_mnt_count > 0) &&
 384                  (fs->super->s_mnt_count >=
 385                   (unsigned) fs->super->s_max_mnt_count)) {
 386                 reason = _(" has been mounted %u times without being checked");
 387                 reason_arg = fs->super->s_mnt_count;
 388                 if (batt && (fs->super->s_mnt_count <
 389                              (unsigned) fs->super->s_max_mnt_count*2))
 390                         reason = 0;
 391         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 392                    (ctx->now < lastcheck)) {
 393                 reason = _(" has filesystem last checked time in the future");
 394                 if (batt)
 395                         reason = 0;
 396         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 397                    ((ctx->now - lastcheck) >=
 398                     ((time_t) fs->super->s_checkinterval))) {
 399                 reason = _(" has gone %u days without being checked");
 400                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 401                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 402                              fs->super->s_checkinterval*2))
 403                         reason = 0;
 404         } else if (broken_system_clock && fs->super->s_checkinterval) {
 405                 log_out(ctx, "%s: ", ctx->device_name);
 406                 log_out(ctx, "%s",
 407                         _("ignoring check interval, broken_system_clock set\n"));
 408         }
 409
 410         if (reason) {
 411                 log_out(ctx, "%s", ctx->device_name);
 412                 log_out(ctx, reason, reason_arg);
 413                 log_out(ctx, "%s", _(", check forced.\n"));
 414                 return;
 415         }
 416
 417         /*
 418          * Update the global counts from the block group counts.  This
 419          * is needed since modern kernels don't update the global
 420          * counts so as to avoid locking the entire file system.  So
 421          * if the filesystem is not unmounted cleanly, the global
 422          * counts may not be accurate.  Update them here if we can,
 423          * for the benefit of users who might examine the file system
 424          * using dumpe2fs.  (This is for cosmetic reasons only.)
 425          */
 426         clear_problem_context(&pctx);
 427         pctx.ino = fs->super->s_free_inodes_count;
 428         pctx.ino2 = ctx->free_inodes;
 429         if ((pctx.ino != pctx.ino2) &&
 430             !(ctx->options & E2F_OPT_READONLY) &&
 431             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 432                 fs->super->s_free_inodes_count = ctx->free_inodes;
 433                 ext2fs_mark_super_dirty(fs);
 434         }
 435         clear_problem_context(&pctx);
 436         pctx.blk = ext2fs_free_blocks_count(fs->super);
 437         pctx.blk2 = ctx->free_blocks;
 438         if ((pctx.blk != pctx.blk2) &&
 439             !(ctx->options & E2F_OPT_READONLY) &&
 440             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 441                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 442                 ext2fs_mark_super_dirty(fs);
 443         }
 444
 445         /* Print the summary message when we're skipping a full check */
 446         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 447                 ctx->device_name,
 448                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 449                 fs->super->s_inodes_count,
 450                 (unsigned long long) ext2fs_blocks_count(fs->super) -
 451                 ext2fs_free_blocks_count(fs->super),
 452                 (unsigned long long) ext2fs_blocks_count(fs->super));
 453         next_check = 100000;
 454         if (fs->super->s_max_mnt_count > 0) {
 455                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 456                 if (next_check <= 0)
 457                         next_check = 1;
 458         }
 459         if (!broken_system_clock && fs->super->s_checkinterval &&
 460             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 461                 next_check = 1;
 462         if (next_check <= 5) {
 463                 if (next_check == 1) {
 464                         if (batt)
 465                                 log_out(ctx, "%s",
 466                                         _(" (check deferred; on battery)"));
 467                         else
 468                                 log_out(ctx, "%s",
 469                                         _(" (check after next mount)"));
 470                 } else
 471                         log_out(ctx, _(" (check in %ld mounts)"),
 472                                 next_check);
 473         }
 474         log_out(ctx, "\n");
 475 skip:
 476         ext2fs_close_free(&ctx->fs);
 477         e2fsck_free_context(ctx);
 478         exit(FSCK_OK);
 479 }
 480
 481 /*
 482  * For completion notice
 483  */
 484 struct percent_tbl {
 485         int     max_pass;
 486         int     table[32];
 487 };
 488 static struct percent_tbl e2fsck_tbl = {
 489         5, { 0, 70, 90, 92,  95, 100 }
 490 };
 491 static char bar[128], spaces[128];
 492
 493 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 494                           int max)
 495 {
 496         float   percent;
 497
 498         if (pass <= 0)
 499                 return 0.0;
 500         if (pass > tbl->max_pass || max == 0)
 501                 return 100.0;
 502         percent = ((float) curr) / ((float) max);
 503         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 504                 + tbl->table[pass-1]);
 505 }
 506
 507 void e2fsck_clear_progbar(e2fsck_t ctx)
 508 {
 509         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 510                 return;
 511
 512         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 513                ctx->stop_meta);
 514         fflush(stdout);
 515         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 516 }
 517
 518 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 519                            unsigned int dpynum)
 520 {
 521         static const char spinner[] = "\\|/-";
 522         int     i;
 523         unsigned int    tick;
 524         struct timeval  tv;
 525         int dpywidth;
 526         int fixed_percent;
 527
 528         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 529                 return 0;
 530
 531         /*
 532          * Calculate the new progress position.  If the
 533          * percentage hasn't changed, then we skip out right
 534          * away.
 535          */
 536         fixed_percent = (int) ((10 * percent) + 0.5);
 537         if (ctx->progress_last_percent == fixed_percent)
 538                 return 0;
 539         ctx->progress_last_percent = fixed_percent;
 540
 541         /*
 542          * If we've already updated the spinner once within
 543          * the last 1/8th of a second, no point doing it
 544          * again.
 545          */
 546         gettimeofday(&tv, NULL);
 547         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 548         if ((tick == ctx->progress_last_time) &&
 549             (fixed_percent != 0) && (fixed_percent != 1000))
 550                 return 0;
 551         ctx->progress_last_time = tick;
 552
 553         /*
 554          * Advance the spinner, and note that the progress bar
 555          * will be on the screen
 556          */
 557         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 558         ctx->flags |= E2F_FLAG_PROG_BAR;
 559
 560         dpywidth = 66 - strlen(label);
 561         dpywidth = 8 * (dpywidth / 8);
 562         if (dpynum)
 563                 dpywidth -= 8;
 564
 565         i = ((percent * dpywidth) + 50) / 100;
 566         printf("%s%s: |%s%s", ctx->start_meta, label,
 567                bar + (sizeof(bar) - (i+1)),
 568                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 569         if (fixed_percent == 1000)
 570                 fputc('|', stdout);
 571         else
 572                 fputc(spinner[ctx->progress_pos & 3], stdout);
 573         printf(" %4.1f%%  ", percent);
 574         if (dpynum)
 575                 printf("%u\r", dpynum);
 576         else
 577                 fputs(" \r", stdout);
 578         fputs(ctx->stop_meta, stdout);
 579
 580         if (fixed_percent == 1000)
 581                 e2fsck_clear_progbar(ctx);
 582         fflush(stdout);
 583
 584         return 0;
 585 }
 586
 587 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 588                                   unsigned long cur, unsigned long max)
 589 {
 590         char buf[1024];
 591         float percent;
 592
 593         if (pass == 0)
 594                 return 0;
 595
 596         if (ctx->progress_fd) {
 597                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 598                          pass, cur, max, ctx->device_name);
 599                 write_all(ctx->progress_fd, buf, strlen(buf));
 600         } else {
 601                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 602                 e2fsck_simple_progress(ctx, ctx->device_name,
 603                                        percent, 0);
 604         }
 605         return 0;
 606 }
 607
 608 #define PATH_SET "PATH=/sbin"
 609
 610 /*
 611  * Make sure 0,1,2 file descriptors are open, so that we don't open
 612  * the filesystem using the same file descriptor as stdout or stderr.
 613  */
 614 static void reserve_stdio_fds(void)
 615 {
 616         int     fd = 0;
 617
 618         while (fd <= 2) {
 619                 fd = open("/dev/null", O_RDWR);
 620                 if (fd < 0) {
 621                         fprintf(stderr, _("ERROR: Couldn't open "
 622                                 "/dev/null (%s)\n"),
 623                                 strerror(errno));
 624                         return;
 625                 }
 626         }
 627         (void) close(fd);
 628 }
 629
 630 #ifdef HAVE_SIGNAL_H
 631 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 632 {
 633         e2fsck_t ctx = e2fsck_global_ctx;
 634
 635         if (!ctx)
 636                 return;
 637
 638         ctx->progress = e2fsck_update_progress;
 639 }
 640
 641 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 642 {
 643         e2fsck_t ctx = e2fsck_global_ctx;
 644
 645         if (!ctx)
 646                 return;
 647
 648         e2fsck_clear_progbar(ctx);
 649         ctx->progress = 0;
 650 }
 651
 652 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 653 {
 654         e2fsck_t ctx = e2fsck_global_ctx;
 655
 656         if (!ctx)
 657                 exit(FSCK_CANCELED);
 658
 659         ctx->flags |= E2F_FLAG_CANCEL;
 660 }
 661 #endif
 662
 663 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 664 {
 665         char    *buf, *token, *next, *p, *arg;
 666         int     ea_ver;
 667         int     extended_usage = 0;
 668         unsigned long long reada_kb;
 669
 670         buf = string_copy(ctx, opts, 0);
 671         for (token = buf; token && *token; token = next) {
 672                 p = strchr(token, ',');
 673                 next = 0;
 674                 if (p) {
 675                         *p = 0;
 676                         next = p+1;
 677                 }
 678                 arg = strchr(token, '=');
 679                 if (arg) {
 680                         *arg = 0;
 681                         arg++;
 682                 }
 683                 if (strcmp(token, "ea_ver") == 0) {
 684                         if (!arg) {
 685                                 extended_usage++;
 686                                 continue;
 687                         }
 688                         ea_ver = strtoul(arg, &p, 0);
 689                         if (*p ||
 690                             ((ea_ver != 1) && (ea_ver != 2))) {
 691                                 fprintf(stderr, "%s",
 692                                         _("Invalid EA version.\n"));
 693                                 extended_usage++;
 694                                 continue;
 695                         }
 696                         ctx->ext_attr_ver = ea_ver;
 697                 } else if (strcmp(token, "readahead_kb") == 0) {
 698                         if (!arg) {
 699                                 extended_usage++;
 700                                 continue;
 701                         }
 702                         reada_kb = strtoull(arg, &p, 0);
 703                         if (*p) {
 704                                 fprintf(stderr, "%s",
 705                                         _("Invalid readahead buffer size.\n"));
 706                                 extended_usage++;
 707                                 continue;
 708                         }
 709                         ctx->readahead_kb = reada_kb;
 710                 } else if (strcmp(token, "fragcheck") == 0) {
 711                         ctx->options |= E2F_OPT_FRAGCHECK;
 712                         continue;
 713                 } else if (strcmp(token, "journal_only") == 0) {
 714                         if (arg) {
 715                                 extended_usage++;
 716                                 continue;
 717                         }
 718                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 719                 } else if (strcmp(token, "discard") == 0) {
 720                         ctx->options |= E2F_OPT_DISCARD;
 721                         continue;
 722                 } else if (strcmp(token, "nodiscard") == 0) {
 723                         ctx->options &= ~E2F_OPT_DISCARD;
 724                         continue;
 725                 } else if (strcmp(token, "optimize_extents") == 0) {
 726                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 727                         continue;
 728                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 729                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 730                         continue;
 731                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 732                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 733                         continue;
 734                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 735                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 736                         continue;
 737                 } else if (strcmp(token, "log_filename") == 0) {
 738                         if (!arg)
 739                                 extended_usage++;
 740                         else
 741                                 ctx->log_fn = string_copy(ctx, arg, 0);
 742                         continue;
 743                 } else if (strcmp(token, "problem_log") == 0) {
 744                         if (!arg)
 745                                 extended_usage++;
 746                         else
 747                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 748                         continue;
 749                 } else if (strcmp(token, "bmap2extent") == 0) {
 750                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 751                         continue;
 752                 } else if (strcmp(token, "fixes_only") == 0) {
 753                         ctx->options |= E2F_OPT_FIXES_ONLY;
 754                         continue;
 755                 } else if (strcmp(token, "unshare_blocks") == 0) {
 756                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 757                         ctx->options |= E2F_OPT_FORCE;
 758                         continue;
 759                 } else if (strcmp(token, "check_encoding") == 0) {
 760                         ctx->options |= E2F_OPT_CHECK_ENCODING;
 761                         continue;
 762 #ifdef CONFIG_DEVELOPER_FEATURES
 763                 } else if (strcmp(token, "clear_all_uninit_bits") == 0) {
 764                         ctx->options |= E2F_OPT_CLEAR_UNINIT;
 765                         continue;
 766 #endif
 767                 } else {
 768                         fprintf(stderr, _("Unknown extended option: %s\n"),
 769                                 token);
 770                         extended_usage++;
 771                 }
 772         }
 773         free(buf);
 774
 775         if (extended_usage) {
 776                 fputs(_("\nExtended options are separated by commas, "
 777                        "and may take an argument which\n"
 778                        "is set off by an equals ('=') sign.  "
 779                        "Valid extended options are:\n\n"), stderr);
 780                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 781                 fputs("\tfragcheck\n", stderr);
 782                 fputs("\tjournal_only\n", stderr);
 783                 fputs("\tdiscard\n", stderr);
 784                 fputs("\tnodiscard\n", stderr);
 785                 fputs("\toptimize_extents\n", stderr);
 786                 fputs("\tno_optimize_extents\n", stderr);
 787                 fputs("\tinode_count_fullmap\n", stderr);
 788                 fputs("\tno_inode_count_fullmap\n", stderr);
 789                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 790                 fputs("\tbmap2extent\n", stderr);
 791                 fputs("\tunshare_blocks\n", stderr);
 792                 fputs("\tfixes_only\n", stderr);
 793                 fputs("\tcheck_encoding\n", stderr);
 794                 fputc('\n', stderr);
 795                 exit(1);
 796         }
 797 }
 798
 799 static void syntax_err_report(const char *filename, long err, int line_num)
 800 {
 801         fprintf(stderr,
 802                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 803                 filename, line_num, error_message(err));
 804         exit(FSCK_ERROR);
 805 }
 806
 807 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 808
 809 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 810 {
 811         int             flush = 0;
 812         int             c, fd;
 813 #ifdef MTRACE
 814         extern void     *mallwatch;
 815 #endif
 816         e2fsck_t        ctx;
 817         errcode_t       retval;
 818 #ifdef HAVE_SIGNAL_H
 819         struct sigaction        sa;
 820 #endif
 821         char            *extended_opts = 0;
 822         char            *cp;
 823         int             res;            /* result of sscanf */
 824 #ifdef CONFIG_JBD_DEBUG
 825         char            *jbd_debug;
 826 #endif
 827         unsigned long long phys_mem_kb, blk;
 828
 829         retval = e2fsck_allocate_context(&ctx);
 830         if (retval)
 831                 return retval;
 832
 833         *ret_ctx = ctx;
 834         e2fsck_global_ctx = ctx;
 835
 836         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 837         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 838         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 839                 ctx->interactive = 1;
 840         } else {
 841                 ctx->start_meta[0] = '\001';
 842                 ctx->stop_meta[0] = '\002';
 843         }
 844         memset(bar, '=', sizeof(bar)-1);
 845         memset(spaces, ' ', sizeof(spaces)-1);
 846         add_error_table(&et_ext2_error_table);
 847         add_error_table(&et_prof_error_table);
 848         blkid_get_cache(&ctx->blkid, NULL);
 849
 850         if (argc && *argv)
 851                 ctx->program_name = *argv;
 852         else
 853                 usage(NULL);
 854
 855         phys_mem_kb = get_memory_size() / 1024;
 856         ctx->readahead_kb = ~0ULL;
 857         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 858                 switch (c) {
 859                 case 'C':
 860                         ctx->progress = e2fsck_update_progress;
 861                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 862                         if (res != 1)
 863                                 goto sscanf_err;
 864
 865                         if (ctx->progress_fd < 0) {
 866                                 ctx->progress = 0;
 867                                 ctx->progress_fd = ctx->progress_fd * -1;
 868                         }
 869                         if (!ctx->progress_fd)
 870                                 break;
 871                         /* Validate the file descriptor to avoid disasters */
 872                         fd = dup(ctx->progress_fd);
 873                         if (fd < 0) {
 874                                 fprintf(stderr,
 875                                 _("Error validating file descriptor %d: %s\n"),
 876                                         ctx->progress_fd,
 877                                         error_message(errno));
 878                                 fatal_error(ctx,
 879                         _("Invalid completion information file descriptor"));
 880                         } else
 881                                 close(fd);
 882                         break;
 883                 case 'D':
 884                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 885                         break;
 886                 case 'E':
 887                         extended_opts = optarg;
 888                         break;
 889                 case 'p':
 890                 case 'a':
 891                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 892                         conflict_opt:
 893                                 fatal_error(ctx,
 894         _("Only one of the options -p/-a, -n or -y may be specified."));
 895                         }
 896                         ctx->options |= E2F_OPT_PREEN;
 897                         break;
 898                 case 'n':
 899                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 900                                 goto conflict_opt;
 901                         ctx->options |= E2F_OPT_NO;
 902                         break;
 903                 case 'y':
 904                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 905                                 goto conflict_opt;
 906                         ctx->options |= E2F_OPT_YES;
 907                         break;
 908                 case 't':
 909 #ifdef RESOURCE_TRACK
 910                         if (ctx->options & E2F_OPT_TIME)
 911                                 ctx->options |= E2F_OPT_TIME2;
 912                         else
 913                                 ctx->options |= E2F_OPT_TIME;
 914 #else
 915                         fprintf(stderr, _("The -t option is not "
 916                                 "supported on this version of e2fsck.\n"));
 917 #endif
 918                         break;
 919                 case 'c':
 920                         if (cflag++)
 921                                 ctx->options |= E2F_OPT_WRITECHECK;
 922                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 923                         break;
 924                 case 'r':
 925                         /* What we do by default, anyway! */
 926                         break;
 927                 case 'b':
 928                         res = sscanf(optarg, "%llu", &blk);
 929                         ctx->use_superblock = blk;
 930                         if (res != 1)
 931                                 goto sscanf_err;
 932                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 933                         break;
 934                 case 'B':
 935                         ctx->blocksize = atoi(optarg);
 936                         break;
 937                 case 'I':
 938                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 939                         if (res != 1)
 940                                 goto sscanf_err;
 941                         break;
 942                 case 'j':
 943                         ctx->journal_name = get_devname(ctx->blkid,
 944                                                         optarg, NULL);
 945                         if (!ctx->journal_name) {
 946                                 com_err(ctx->program_name, 0,
 947                                         _("Unable to resolve '%s'"),
 948                                         optarg);
 949                                 fatal_error(ctx, 0);
 950                         }
 951                         break;
 952                 case 'P':
 953                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 954                         if (res != 1)
 955                                 goto sscanf_err;
 956                         break;
 957                 case 'L':
 958                         replace_bad_blocks++;
 959                         /* fall through */
 960                 case 'l':
 961                         if (bad_blocks_file)
 962                                 free(bad_blocks_file);
 963                         bad_blocks_file = string_copy(ctx, optarg, 0);
 964                         break;
 965                 case 'd':
 966                         ctx->options |= E2F_OPT_DEBUG;
 967                         break;
 968                 case 'f':
 969                         ctx->options |= E2F_OPT_FORCE;
 970                         break;
 971                 case 'F':
 972                         flush = 1;
 973                         break;
 974                 case 'v':
 975                         verbose = 1;
 976                         break;
 977                 case 'V':
 978                         show_version_only = 1;
 979                         break;
 980 #ifdef MTRACE
 981                 case 'M':
 982                         mallwatch = (void *) strtol(optarg, NULL, 0);
 983                         break;
 984 #endif
 985                 case 'N':
 986                         ctx->device_name = string_copy(ctx, optarg, 0);
 987                         break;
 988                 case 'k':
 989                         keep_bad_blocks++;
 990                         break;
 991                 case 'z':
 992                         ctx->undo_file = optarg;
 993                         break;
 994                 default:
 995                         usage(ctx);
 996                 }
 997         if (show_version_only)
 998                 return 0;
 999         if (optind != argc - 1)
1000                 usage(ctx);
1001         if ((ctx->options & E2F_OPT_NO) &&
1002             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1003                 com_err(ctx->program_name, 0, "%s",
1004                         _("The -n and -D options are incompatible."));
1005                 fatal_error(ctx, 0);
1006         }
1007         if ((ctx->options & E2F_OPT_NO) && cflag) {
1008                 com_err(ctx->program_name, 0, "%s",
1009                         _("The -n and -c options are incompatible."));
1010                 fatal_error(ctx, 0);
1011         }
1012         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1013                 com_err(ctx->program_name, 0, "%s",
1014                         _("The -n and -l/-L options are incompatible."));
1015                 fatal_error(ctx, 0);
1016         }
1017         if (ctx->options & E2F_OPT_NO)
1018                 ctx->options |= E2F_OPT_READONLY;
1019
1020         ctx->io_options = strchr(argv[optind], '?');
1021         if (ctx->io_options)
1022                 *ctx->io_options++ = 0;
1023         ctx->filesystem_name = get_devname(ctx->blkid, argv[optind], 0);
1024         if (!ctx->filesystem_name) {
1025                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1026                         argv[optind]);
1027                 fatal_error(ctx, 0);
1028         }
1029         if (extended_opts)
1030                 parse_extended_opts(ctx, extended_opts);
1031
1032         /* Complain about mutually exclusive rebuilding activities */
1033         if (getenv("E2FSCK_FIXES_ONLY"))
1034                 ctx->options |= E2F_OPT_FIXES_ONLY;
1035         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1036             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1037                 com_err(ctx->program_name, 0, "%s",
1038                         _("The -D and -E fixes_only options are incompatible."));
1039                 fatal_error(ctx, 0);
1040         }
1041         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1042             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1043                 com_err(ctx->program_name, 0, "%s",
1044                         _("The -E bmap2extent and fixes_only options are incompatible."));
1045                 fatal_error(ctx, 0);
1046         }
1047
1048         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
1049                 config_fn[0] = cp;
1050         profile_set_syntax_err_cb(syntax_err_report);
1051         profile_init(config_fn, &ctx->profile);
1052
1053         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1054                             &c);
1055         if (c)
1056                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1057         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1058                             &c);
1059         if (c)
1060                 verbose = 1;
1061
1062         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1063                             0, 0, &c);
1064         if (c)
1065                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1066
1067         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1068                             0, 0, &c);
1069         if (c)
1070                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1071
1072         if (ctx->readahead_kb == ~0ULL) {
1073                 profile_get_integer(ctx->profile, "options",
1074                                     "readahead_mem_pct", 0, -1, &c);
1075                 if (c >= 0 && c <= 100)
1076                         ctx->readahead_kb = phys_mem_kb * c / 100;
1077                 profile_get_integer(ctx->profile, "options",
1078                                     "readahead_kb", 0, -1, &c);
1079                 if (c >= 0)
1080                         ctx->readahead_kb = c;
1081                 if (ctx->readahead_kb != ~0ULL &&
1082                     ctx->readahead_kb > phys_mem_kb)
1083                         ctx->readahead_kb = phys_mem_kb;
1084         }
1085
1086         /* Turn off discard in read-only mode */
1087         if ((ctx->options & E2F_OPT_NO) &&
1088             (ctx->options & E2F_OPT_DISCARD))
1089                 ctx->options &= ~E2F_OPT_DISCARD;
1090
1091         if (flush) {
1092                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1093                 if (fd < 0) {
1094                         com_err("open", errno,
1095                                 _("while opening %s for flushing"),
1096                                 ctx->filesystem_name);
1097                         fatal_error(ctx, 0);
1098                 }
1099                 if ((retval = ext2fs_sync_device(fd, 1))) {
1100                         com_err("ext2fs_sync_device", retval,
1101                                 _("while trying to flush %s"),
1102                                 ctx->filesystem_name);
1103                         fatal_error(ctx, 0);
1104                 }
1105                 close(fd);
1106         }
1107         if (cflag && bad_blocks_file) {
1108                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1109                                         "be both used at the same time.\n"));
1110                 exit(FSCK_USAGE);
1111         }
1112 #ifdef HAVE_SIGNAL_H
1113         /*
1114          * Set up signal action
1115          */
1116         memset(&sa, 0, sizeof(struct sigaction));
1117         sa.sa_handler = signal_cancel;
1118         sigaction(SIGINT, &sa, 0);
1119         sigaction(SIGTERM, &sa, 0);
1120 #ifdef SA_RESTART
1121         sa.sa_flags = SA_RESTART;
1122 #endif
1123         sa.sa_handler = signal_progress_on;
1124         sigaction(SIGUSR1, &sa, 0);
1125         sa.sa_handler = signal_progress_off;
1126         sigaction(SIGUSR2, &sa, 0);
1127 #endif
1128
1129         /* Update our PATH to include /sbin if we need to run badblocks  */
1130         if (cflag) {
1131                 char *oldpath = getenv("PATH");
1132                 char *newpath;
1133                 int len = sizeof(PATH_SET) + 1;
1134
1135                 if (oldpath)
1136                         len += strlen(oldpath);
1137
1138                 newpath = malloc(len);
1139                 if (!newpath)
1140                         fatal_error(ctx, "Couldn't malloc() newpath");
1141                 strcpy(newpath, PATH_SET);
1142
1143                 if (oldpath) {
1144                         strcat(newpath, ":");
1145                         strcat(newpath, oldpath);
1146                 }
1147                 putenv(newpath);
1148         }
1149 #ifdef CONFIG_JBD_DEBUG
1150         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1151         if (jbd_debug) {
1152                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1153                 if (res != 1) {
1154                         fprintf(stderr,
1155                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1156                                 jbd_debug);
1157                         exit (1);
1158                 }
1159         }
1160 #endif
1161         return 0;
1162
1163 sscanf_err:
1164         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1165                 c, optarg);
1166         exit (1);
1167 }
1168
1169 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1170                              ext2_filsys *ret_fs)
1171 {
1172         errcode_t retval;
1173
1174         *ret_fs = NULL;
1175
1176         if (ctx->superblock) {
1177                 unsigned long blocksize = ctx->blocksize;
1178
1179                 if (!blocksize) {
1180                         for (blocksize = EXT2_MIN_BLOCK_SIZE;
1181                              blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1182
1183                                 retval = ext2fs_open2(ctx->filesystem_name,
1184                                                       ctx->io_options, flags,
1185                                                       ctx->superblock, blocksize,
1186                                                       unix_io_manager, ret_fs);
1187                                 if (*ret_fs) {
1188                                         ext2fs_free(*ret_fs);
1189                                         *ret_fs = NULL;
1190                                 }
1191                                 if (!retval)
1192                                         break;
1193                         }
1194                         if (retval)
1195                                 return retval;
1196                 }
1197
1198                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1199                                       flags, ctx->superblock, blocksize,
1200                                       io_ptr, ret_fs);
1201         } else
1202                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1203                                       flags, 0, 0, io_ptr, ret_fs);
1204
1205         if (retval == 0) {
1206                 (*ret_fs)->priv_data = ctx;
1207                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1208                                        "default", NULL);
1209         }
1210         return retval;
1211 }
1212
1213 static const char *my_ver_string = E2FSPROGS_VERSION;
1214 static const char *my_ver_date = E2FSPROGS_DATE;
1215
1216 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1217 {
1218         struct mmp_struct *mmp_s;
1219         unsigned int mmp_check_interval;
1220         errcode_t retval = 0;
1221         struct problem_context pctx;
1222         unsigned int wait_time = 0;
1223
1224         clear_problem_context(&pctx);
1225         if (fs->mmp_buf == NULL) {
1226                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1227                 if (retval)
1228                         goto check_error;
1229         }
1230
1231         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1232         if (retval)
1233                 goto check_error;
1234
1235         mmp_s = fs->mmp_buf;
1236
1237         mmp_check_interval = fs->super->s_mmp_update_interval;
1238         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1239                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1240
1241         /*
1242          * If check_interval in MMP block is larger, use that instead of
1243          * check_interval from the superblock.
1244          */
1245         if (mmp_s->mmp_check_interval > mmp_check_interval)
1246                 mmp_check_interval = mmp_s->mmp_check_interval;
1247
1248         wait_time = mmp_check_interval * 2 + 1;
1249
1250         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1251                 retval = 0;
1252         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1253                 retval = EXT2_ET_MMP_FSCK_ON;
1254         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1255                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1256
1257         if (retval)
1258                 goto check_error;
1259
1260         /* Print warning if e2fsck will wait for more than 20 secs. */
1261         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1262                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1263                                "time is %u seconds. Please wait...\n"),
1264                         mmp_check_interval, wait_time * 2);
1265         }
1266
1267         return 0;
1268
1269 check_error:
1270
1271         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1272                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1273                         fs->super->s_mmp_block = 0;
1274                         ext2fs_mark_super_dirty(fs);
1275                         retval = 0;
1276                 }
1277         } else if (retval == EXT2_ET_MMP_FAILED) {
1278                 com_err(ctx->program_name, retval, "%s",
1279                         _("while checking MMP block"));
1280                 dump_mmp_msg(fs->mmp_buf, NULL);
1281         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1282                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1283                 com_err(ctx->program_name, retval, "%s",
1284                         _("while checking MMP block"));
1285                 dump_mmp_msg(fs->mmp_buf,
1286                              _("If you are sure the filesystem is not "
1287                                "in use on any node, run:\n"
1288                                "'tune2fs -f -E clear_mmp %s'\n"),
1289                              ctx->device_name);
1290         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1291                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1292                         ext2fs_mmp_clear(fs);
1293                         retval = 0;
1294                 }
1295         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1296                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1297                         ext2fs_mmp_clear(fs);
1298                         retval = 0;
1299                 }
1300         } else
1301                 com_err(ctx->program_name, retval, "%s",
1302                         _("while reading MMP block"));
1303         return retval;
1304 }
1305
1306 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1307 {
1308         errcode_t retval = ENOMEM;
1309         char *tdb_dir = NULL, *tdb_file = NULL;
1310         char *dev_name, *tmp_name;
1311         int free_tdb_dir = 0;
1312
1313         /* (re)open a specific undo file */
1314         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1315                 retval = set_undo_io_backing_manager(*io_ptr);
1316                 if (retval)
1317                         goto err;
1318                 *io_ptr = undo_io_manager;
1319                 retval = set_undo_io_backup_file(ctx->undo_file);
1320                 if (retval)
1321                         goto err;
1322                 printf(_("Overwriting existing filesystem; this can be undone "
1323                          "using the command:\n"
1324                          "    e2undo %s %s\n\n"),
1325                         ctx->undo_file, ctx->filesystem_name);
1326                 return retval;
1327         }
1328
1329         /*
1330          * Configuration via a conf file would be
1331          * nice
1332          */
1333         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1334         if (!tdb_dir) {
1335                 profile_get_string(ctx->profile, "defaults",
1336                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1337                                    &tdb_dir);
1338                 free_tdb_dir = 1;
1339         }
1340
1341         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1342             access(tdb_dir, W_OK)) {
1343                 if (free_tdb_dir)
1344                         free(tdb_dir);
1345                 return 0;
1346         }
1347
1348         tmp_name = strdup(ctx->filesystem_name);
1349         if (!tmp_name)
1350                 goto errout;
1351         dev_name = basename(tmp_name);
1352         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1353         if (!tdb_file) {
1354                 free(tmp_name);
1355                 goto errout;
1356         }
1357         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1358         free(tmp_name);
1359
1360         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1361                 retval = errno;
1362                 com_err(ctx->program_name, retval,
1363                         _("while trying to delete %s"), tdb_file);
1364                 goto errout;
1365         }
1366
1367         retval = set_undo_io_backing_manager(*io_ptr);
1368         if (retval)
1369                 goto errout;
1370         *io_ptr = undo_io_manager;
1371         retval = set_undo_io_backup_file(tdb_file);
1372         if (retval)
1373                 goto errout;
1374         printf(_("Overwriting existing filesystem; this can be undone "
1375                  "using the command:\n"
1376                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1377
1378         if (free_tdb_dir)
1379                 free(tdb_dir);
1380         free(tdb_file);
1381         return 0;
1382
1383 errout:
1384         if (free_tdb_dir)
1385                 free(tdb_dir);
1386         free(tdb_file);
1387 err:
1388         com_err(ctx->program_name, retval, "%s",
1389                 _("while trying to setup undo file\n"));
1390         return retval;
1391 }
1392
1393 int main (int argc, char *argv[])
1394 {
1395         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1396         int             exit_value = FSCK_OK;
1397         ext2_filsys     fs = 0;
1398         io_manager      io_ptr;
1399         struct ext2_super_block *sb;
1400         const char      *lib_ver_date;
1401         int             my_ver, lib_ver;
1402         e2fsck_t        ctx;
1403         blk64_t         orig_superblock = ~(blk64_t)0;
1404         struct problem_context pctx;
1405         int flags, run_result, was_changed;
1406         int journal_size;
1407         int sysval, sys_page_size = 4096;
1408         int old_bitmaps;
1409         __u32 features[3];
1410         char *cp;
1411         enum quota_type qtype;
1412         struct ext2fs_journal_params jparams;
1413
1414         clear_problem_context(&pctx);
1415         sigcatcher_setup();
1416 #ifdef MTRACE
1417         mtrace();
1418 #endif
1419 #ifdef MCHECK
1420         mcheck(0);
1421 #endif
1422 #ifdef ENABLE_NLS
1423         setlocale(LC_MESSAGES, "");
1424         setlocale(LC_CTYPE, "");
1425         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1426         textdomain(NLS_CAT_NAME);
1427         set_com_err_gettext(gettext);
1428 #endif
1429         my_ver = ext2fs_parse_version_string(my_ver_string);
1430         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1431         if (my_ver > lib_ver) {
1432                 fprintf( stderr, "%s",
1433                          _("Error: ext2fs library version out of date!\n"));
1434                 show_version_only++;
1435         }
1436
1437         retval = PRS(argc, argv, &ctx);
1438         if (retval) {
1439                 com_err("e2fsck", retval, "%s",
1440                         _("while trying to initialize program"));
1441                 exit(FSCK_ERROR);
1442         }
1443         reserve_stdio_fds();
1444
1445         set_up_logging(ctx);
1446         if (ctx->logf) {
1447                 int i;
1448
1449                 fputs("E2fsck run: ", ctx->logf);
1450                 for (i = 0; i < argc; i++) {
1451                         if (i)
1452                                 fputc(' ', ctx->logf);
1453                         fputs(argv[i], ctx->logf);
1454                 }
1455                 fputc('\n', ctx->logf);
1456         }
1457         if (ctx->problem_logf) {
1458                 int i;
1459
1460                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1461                       ctx->problem_logf);
1462                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1463                         (unsigned long) ctx->now);
1464                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1465                         argv[0]);
1466                 for (i = 1; i < argc; i++)
1467                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1468                 fputs("/>\n", ctx->problem_logf);
1469         }
1470
1471         init_resource_track(&ctx->global_rtrack, NULL);
1472         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1473                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1474                          my_ver_date);
1475
1476         if (show_version_only) {
1477                 log_err(ctx, _("\tUsing %s, %s\n"),
1478                         error_message(EXT2_ET_BASE), lib_ver_date);
1479                 exit(FSCK_OK);
1480         }
1481
1482         check_mount(ctx);
1483
1484         if (!(ctx->options & E2F_OPT_PREEN) &&
1485             !(ctx->options & E2F_OPT_NO) &&
1486             !(ctx->options & E2F_OPT_YES)) {
1487                 if (!ctx->interactive)
1488                         fatal_error(ctx,
1489                                     _("need terminal for interactive repairs"));
1490         }
1491         ctx->superblock = ctx->use_superblock;
1492
1493         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1494 restart:
1495 #ifdef CONFIG_TESTIO_DEBUG
1496         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1497                 io_ptr = test_io_manager;
1498                 test_io_backing_manager = unix_io_manager;
1499         } else
1500 #endif
1501                 io_ptr = unix_io_manager;
1502         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1503         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1504                             &old_bitmaps);
1505         if (!old_bitmaps)
1506                 flags |= EXT2_FLAG_64BITS;
1507         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1508                 flags |= EXT2_FLAG_RW;
1509                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1510                       ctx->mount_flags & EXT2_MF_READONLY))
1511                         flags |= EXT2_FLAG_EXCLUSIVE;
1512                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1513                     (ctx->options & E2F_OPT_FORCE))
1514                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1515         }
1516
1517         if (ctx->undo_file) {
1518                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1519                 if (retval)
1520                         exit(FSCK_ERROR);
1521         }
1522
1523         ctx->openfs_flags = flags;
1524         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1525
1526         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1527             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1528             ((retval == EXT2_ET_BAD_MAGIC) ||
1529              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1530              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1531              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1532                 if (retval) {
1533                         pctx.errcode = retval;
1534                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1535                 }
1536                 if (retval2) {
1537                         pctx.errcode = retval2;
1538                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1539                 }
1540                 pctx.errcode = 0;
1541                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1542                         retval = retval2;
1543                         goto failure;
1544                 }
1545                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1546                         ext2fs_free(fs);
1547                         fs = NULL;
1548                 }
1549                 if (!fs || (fs->group_desc_count > 1)) {
1550                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1551                                 ctx->program_name,
1552                                 retval ? _("Superblock invalid,") :
1553                                 _("Group descriptors look bad..."));
1554                         orig_superblock = ctx->superblock;
1555                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1556                         if (fs)
1557                                 ext2fs_close_free(&fs);
1558                         orig_retval = retval;
1559                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1560                         if ((orig_retval == 0) && retval != 0) {
1561                                 if (fs)
1562                                         ext2fs_close_free(&fs);
1563                                 log_out(ctx, _("%s: %s while using the "
1564                                                "backup blocks"),
1565                                         ctx->program_name,
1566                                         error_message(retval));
1567                                 log_out(ctx, _("%s: going back to original "
1568                                                "superblock\n"),
1569                                         ctx->program_name);
1570                                 ctx->superblock = orig_superblock;
1571                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1572                         }
1573                 }
1574         }
1575         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1576              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1577             fs && fs->super) {
1578                 sb = fs->super;
1579                 features[0] = (sb->s_feature_compat &
1580                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1581                 features[1] = (sb->s_feature_incompat &
1582                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1583                 features[2] = (sb->s_feature_ro_compat &
1584                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1585                 if (features[0] || features[1] || features[2])
1586                         goto print_unsupp_features;
1587         }
1588 failure:
1589         if (retval) {
1590                 if (orig_retval)
1591                         retval = orig_retval;
1592                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1593                         ctx->filesystem_name);
1594                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1595                         log_out(ctx, "%s",
1596                                 _("The filesystem revision is apparently "
1597                                   "too high for this version of e2fsck.\n"
1598                                   "(Or the filesystem superblock "
1599                                   "is corrupt)\n\n"));
1600                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1601                 } else if (retval == EXT2_ET_SHORT_READ)
1602                         log_out(ctx, "%s",
1603                                 _("Could this be a zero-length partition?\n"));
1604                 else if ((retval == EPERM) || (retval == EACCES))
1605                         log_out(ctx, _("You must have %s access to the "
1606                                        "filesystem or be root\n"),
1607                                (ctx->options & E2F_OPT_READONLY) ?
1608                                "r/o" : "r/w");
1609                 else if (retval == ENXIO)
1610                         log_out(ctx, "%s",
1611                                 _("Possibly non-existent or swap device?\n"));
1612                 else if (retval == EBUSY)
1613                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1614                                          "exclusively by another program?\n"));
1615                 else if (retval == ENOENT)
1616                         log_out(ctx, "%s",
1617                                 _("Possibly non-existent device?\n"));
1618 #ifdef EROFS
1619                 else if (retval == EROFS)
1620                         log_out(ctx, "%s", _("Disk write-protected; use the "
1621                                              "-n option to do a read-only\n"
1622                                              "check of the device.\n"));
1623 #endif
1624                 else {
1625                         /*
1626                          * Let's try once more will less consistency checking
1627                          * so that we are able to recover from more errors
1628                          * (e.g. some tool messing up some value in the sb).
1629                          */
1630                         if (((retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1631                              (retval == EXT2_ET_BAD_DESC_SIZE)) &&
1632                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1633                                 if (fs)
1634                                         ext2fs_close_free(&fs);
1635                                 log_out(ctx, _("%s: Trying to load superblock "
1636                                         "despite errors...\n"),
1637                                         ctx->program_name);
1638                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1639                                 /*
1640                                  * If we tried backup sb, revert to the
1641                                  * original one now.
1642                                  */
1643                                 if (orig_superblock != ~(blk64_t)0)
1644                                         ctx->superblock = orig_superblock;
1645                                 goto restart;
1646                         }
1647                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1648                         if (retval == EXT2_ET_BAD_MAGIC)
1649                                 check_plausibility(ctx->filesystem_name,
1650                                                    CHECK_FS_EXIST, NULL);
1651                 }
1652                 fatal_error(ctx, 0);
1653         }
1654         /*
1655          * We only update the master superblock because (a) paranoia;
1656          * we don't want to corrupt the backup superblocks, and (b) we
1657          * don't need to update the mount count and last checked
1658          * fields in the backup superblock (the kernel doesn't update
1659          * the backup superblocks anyway).  With newer versions of the
1660          * library this flag is set by ext2fs_open2(), but we set this
1661          * here just to be sure.  (No, we don't support e2fsck running
1662          * with some other libext2fs than the one that it was shipped
1663          * with, but just in case....)
1664          */
1665         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1666
1667         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1668                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1669                 int need_restart = 0;
1670
1671                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1672                                                        blocksize,
1673                                                        &ctx->num_blocks);
1674                 /*
1675                  * The floppy driver refuses to allow anyone else to
1676                  * open the device if has been opened with O_EXCL;
1677                  * this is unlike other block device drivers in Linux.
1678                  * To handle this, we close the filesystem and then
1679                  * reopen the filesystem after we get the device size.
1680                  */
1681                 if (pctx.errcode == EBUSY) {
1682                         ext2fs_close_free(&fs);
1683                         need_restart++;
1684                         pctx.errcode =
1685                                 ext2fs_get_device_size2(ctx->filesystem_name,
1686                                                         blocksize,
1687                                                         &ctx->num_blocks);
1688                 }
1689                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1690                         ctx->num_blocks = 0;
1691                 else if (pctx.errcode) {
1692                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1693                         ctx->flags |= E2F_FLAG_ABORT;
1694                         fatal_error(ctx, 0);
1695                 }
1696                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1697                 if (need_restart)
1698                         goto restart;
1699         }
1700
1701         ctx->fs = fs;
1702         fs->now = ctx->now;
1703         sb = fs->super;
1704
1705         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1706                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1707                         _("while trying to open %s"),
1708                         ctx->filesystem_name);
1709         get_newer:
1710                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1711         }
1712
1713         /*
1714          * Set the device name, which is used whenever we print error
1715          * or informational messages to the user.
1716          */
1717         if (ctx->device_name == 0 && sb->s_volume_name[0])
1718                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1719                                                sizeof(sb->s_volume_name));
1720
1721         if (ctx->device_name == 0)
1722                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1723         for (cp = ctx->device_name; *cp; cp++)
1724                 if (isspace(*cp) || *cp == ':')
1725                         *cp = '_';
1726
1727         if (ctx->problem_logf) {
1728
1729                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1730                         ctx->filesystem_name);
1731                 if (!uuid_is_null(sb->s_uuid)) {
1732                         char buf[48];
1733
1734                         uuid_unparse(sb->s_uuid, buf);
1735                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1736                 }
1737                 if (sb->s_volume_name[0])
1738                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1739                                 EXT2_LEN_STR(sb->s_volume_name));
1740
1741                 fputs("/>\n", ctx->problem_logf);
1742         }
1743
1744         ehandler_init(fs->io);
1745
1746         if (ext2fs_has_feature_mmp(fs->super) &&
1747             (flags & EXT2_FLAG_SKIP_MMP)) {
1748                 if (e2fsck_check_mmp(fs, ctx))
1749                         fatal_error(ctx, 0);
1750
1751                 /*
1752                  * Restart in order to reopen fs but this time start mmp.
1753                  */
1754                 ext2fs_close_free(&ctx->fs);
1755                 flags &= ~EXT2_FLAG_SKIP_MMP;
1756                 goto restart;
1757         }
1758
1759         if (ctx->logf)
1760                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1761                         e2p_uuid2str(sb->s_uuid));
1762
1763         /*
1764          * Make sure the ext3 superblock fields are consistent.
1765          */
1766         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1767                 retval = e2fsck_check_ext3_journal(ctx);
1768                 if (retval) {
1769                         com_err(ctx->program_name, retval,
1770                                 _("while checking journal for %s"),
1771                                 ctx->device_name);
1772                         fatal_error(ctx,
1773                                 _("Cannot proceed with file system check"));
1774                 }
1775         }
1776
1777         /*
1778          * Check to see if we need to do ext3-style recovery.  If so,
1779          * do it, and then restart the fsck.
1780          */
1781         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1782                 if (ctx->options & E2F_OPT_READONLY) {
1783                         log_out(ctx, "%s",
1784                                 _("Warning: skipping journal recovery because "
1785                                   "doing a read-only filesystem check.\n"));
1786                         io_channel_flush(ctx->fs->io);
1787                 } else {
1788                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1789                                 /*
1790                                  * Whoops, we attempted to run the
1791                                  * journal twice.  This should never
1792                                  * happen, unless the hardware or
1793                                  * device driver is being bogus.
1794                                  */
1795                                 com_err(ctx->program_name, 0,
1796                                         _("unable to set superblock flags "
1797                                           "on %s\n"), ctx->device_name);
1798                                 fatal_error(ctx, 0);
1799                         }
1800                         retval = e2fsck_run_ext3_journal(ctx);
1801                         if (retval == EFSBADCRC) {
1802                                 log_out(ctx, _("Journal checksum error "
1803                                                "found in %s\n"),
1804                                         ctx->device_name);
1805                         } else if (retval == EFSCORRUPTED) {
1806                                 log_out(ctx, _("Journal corrupted in %s\n"),
1807                                         ctx->device_name);
1808                         } else if (retval) {
1809                                 com_err(ctx->program_name, retval,
1810                                 _("while recovering journal of %s"),
1811                                         ctx->device_name);
1812                         }
1813                         ext2fs_close_free(&ctx->fs);
1814                         ctx->flags |= E2F_FLAG_RESTARTED;
1815                         goto restart;
1816                 }
1817         }
1818
1819         /*
1820          * Check for compatibility with the feature sets.  We need to
1821          * be more stringent than ext2fs_open().
1822          */
1823         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1824         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1825         features[2] = (sb->s_feature_ro_compat &
1826                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1827 print_unsupp_features:
1828         if (features[0] || features[1] || features[2]) {
1829                 int     i, j;
1830                 __u32   *mask = features, m;
1831
1832                 log_err(ctx, _("%s has unsupported feature(s):"),
1833                         ctx->filesystem_name);
1834
1835                 for (i=0; i <3; i++,mask++) {
1836                         for (j=0,m=1; j < 32; j++, m<<=1) {
1837                                 if (*mask & m)
1838                                         log_err(ctx, " %s",
1839                                                 e2p_feature2string(i, m));
1840                         }
1841                 }
1842                 log_err(ctx, "\n");
1843                 goto get_newer;
1844         }
1845
1846         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1847                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1848                         ctx->filesystem_name, sb->s_encoding);
1849                 goto get_newer;
1850         }
1851
1852         /*
1853          * If the user specified a specific superblock, presumably the
1854          * master superblock has been trashed.  So we mark the
1855          * superblock as dirty, so it can be written out.
1856          */
1857         if (ctx->superblock &&
1858             !(ctx->options & E2F_OPT_READONLY))
1859                 ext2fs_mark_super_dirty(fs);
1860
1861         /*
1862          * Calculate the number of filesystem blocks per pagesize.  If
1863          * fs->blocksize > page_size, set the number of blocks per
1864          * pagesize to 1 to avoid division by zero errors.
1865          */
1866 #ifdef _SC_PAGESIZE
1867         sysval = sysconf(_SC_PAGESIZE);
1868         if (sysval > 0)
1869                 sys_page_size = sysval;
1870 #endif /* _SC_PAGESIZE */
1871         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1872         if (ctx->blocks_per_page == 0)
1873                 ctx->blocks_per_page = 1;
1874
1875         if (ctx->superblock)
1876                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1877         ext2fs_mark_valid(fs);
1878         check_super_block(ctx);
1879         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1880                 fatal_error(ctx, 0);
1881         check_if_skip(ctx);
1882         check_resize_inode(ctx);
1883         if (bad_blocks_file)
1884                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1885         else if (cflag)
1886                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1887         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1888                 fatal_error(ctx, 0);
1889
1890         /*
1891          * Mark the system as valid, 'til proven otherwise
1892          */
1893         ext2fs_mark_valid(fs);
1894
1895         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1896         if (retval) {
1897                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1898                         ctx->program_name, error_message(retval));
1899                 preenhalt(ctx);
1900                 log_out(ctx, "%s", _("This doesn't bode well, "
1901                                      "but we'll try to go on...\n"));
1902         }
1903
1904         /*
1905          * Save the journal size in megabytes.
1906          * Try and use the journal size from the backup else let e2fsck
1907          * find the default journal size. If fast commit feature is enabled,
1908          * it is not clear how many of the journal blocks were fast commit
1909          * blocks. So, ignore the size of journal found in backup.
1910          *
1911          * TODO: Add a new backup type that captures fast commit info as
1912          * well.
1913          */
1914         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
1915                 !ext2fs_has_feature_fast_commit(sb))
1916                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1917                                (sb->s_jnl_blocks[16] >> 20);
1918         else
1919                 journal_size = -1;
1920
1921         if (ext2fs_has_feature_quota(sb)) {
1922                 /* Quotas were enabled. Do quota accounting during fsck. */
1923                 clear_problem_context(&pctx);
1924                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1925                 if (pctx.errcode) {
1926                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1927                         fatal_error(ctx, 0);
1928                 }
1929         }
1930
1931         run_result = e2fsck_run(ctx);
1932         e2fsck_clear_progbar(ctx);
1933
1934         if (!ctx->invalid_bitmaps &&
1935             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1936                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1937                         if (journal_size < 1024) {
1938                                 ext2fs_get_journal_params(&jparams, fs);
1939                         } else {
1940                                 jparams.num_journal_blocks = journal_size;
1941                                 jparams.num_fc_blocks = 0;
1942                         }
1943                         log_out(ctx, _("Creating journal (%d blocks): "),
1944                                jparams.num_journal_blocks);
1945                         fflush(stdout);
1946                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
1947                         if (retval) {
1948                                 log_out(ctx, "%s: while trying to create "
1949                                         "journal\n", error_message(retval));
1950                                 goto no_journal;
1951                         }
1952                         log_out(ctx, "%s", _(" Done.\n"));
1953                         log_out(ctx, "%s",
1954                                 _("\n*** journal has been regenerated ***\n"));
1955                 }
1956         }
1957 no_journal:
1958
1959         if (run_result & E2F_FLAG_ABORT) {
1960                 fatal_error(ctx, _("aborted"));
1961         } else if (run_result & E2F_FLAG_CANCEL) {
1962                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1963                         ctx->device_name : ctx->filesystem_name);
1964                 exit_value |= FSCK_CANCELED;
1965         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
1966                 int needs_writeout;
1967
1968                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1969                         if (*quota_sb_inump(sb, qtype) == 0)
1970                                 continue;
1971                         needs_writeout = 0;
1972                         pctx.num = qtype;
1973                         retval = quota_compare_and_update(ctx->qctx, qtype,
1974                                                           &needs_writeout);
1975                         if ((retval || needs_writeout) &&
1976                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
1977                                 pctx.errcode = quota_write_inode(ctx->qctx,
1978                                                                  1 << qtype);
1979                                 if (pctx.errcode)
1980                                         (void) fix_problem(ctx,
1981                                                 PR_6_WRITE_QUOTAS, &pctx);
1982                         }
1983                 }
1984                 quota_release_context(&ctx->qctx);
1985         }
1986
1987         if (run_result == E2F_FLAG_RESTART) {
1988                 log_out(ctx, "%s",
1989                         _("Restarting e2fsck from the beginning...\n"));
1990                 retval = e2fsck_reset_context(ctx);
1991                 if (retval) {
1992                         com_err(ctx->program_name, retval, "%s",
1993                                 _("while resetting context"));
1994                         fatal_error(ctx, 0);
1995                 }
1996                 ext2fs_close_free(&ctx->fs);
1997                 goto restart;
1998         }
1999
2000 #ifdef MTRACE
2001         mtrace_print("Cleanup");
2002 #endif
2003         was_changed = ext2fs_test_changed(fs);
2004         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2005             !(ctx->options & E2F_OPT_READONLY)) {
2006                 if (ext2fs_test_valid(fs)) {
2007                         if (!(sb->s_state & EXT2_VALID_FS))
2008                                 exit_value |= FSCK_NONDESTRUCT;
2009                         sb->s_state = EXT2_VALID_FS;
2010                         if (check_backup_super_block(ctx))
2011                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2012                 } else
2013                         sb->s_state &= ~EXT2_VALID_FS;
2014                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2015                         sb->s_lastcheck = ctx->now;
2016                 sb->s_mnt_count = 0;
2017                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2018                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2019                 if (pctx.errcode)
2020                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2021                 ext2fs_mark_super_dirty(fs);
2022         }
2023
2024         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2025             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2026             (ctx->options & E2F_OPT_NO))
2027                 /* Don't try to write or flush I/O, we just wanted to know whether or
2028                  * not there were enough free blocks to undo deduplication.
2029                  */
2030                 goto skip_write;
2031
2032         if (!(ctx->options & E2F_OPT_READONLY)) {
2033                 e2fsck_write_bitmaps(ctx);
2034                 if (fs->flags & EXT2_FLAG_DIRTY) {
2035                         pctx.errcode = ext2fs_flush(ctx->fs);
2036                         if (pctx.errcode)
2037                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2038                 }
2039                 pctx.errcode = io_channel_flush(ctx->fs->io);
2040                 if (pctx.errcode)
2041                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2042         }
2043
2044         if (was_changed) {
2045                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2046
2047                 if (fs_fixed)
2048                         exit_value |= FSCK_NONDESTRUCT;
2049                 if (!(ctx->options & E2F_OPT_PREEN)) {
2050 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2051                         log_out(ctx, fs_fixed ?
2052                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2053                                   "CORRECTED *****\n") :
2054                                 _("%s: File system was modified.\n"),
2055                                 ctx->device_name);
2056 #else
2057                         log_out(ctx,
2058                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2059                                 ctx->device_name);
2060 #endif
2061                 }
2062                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2063                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2064                                 ctx->device_name);
2065                         exit_value |= FSCK_REBOOT;
2066                 }
2067         }
2068
2069 skip_write:
2070         if (!ext2fs_test_valid(fs) ||
2071             ((exit_value & FSCK_CANCELED) &&
2072              (sb->s_state & EXT2_ERROR_FS))) {
2073                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2074                                "errors **********\n\n"), ctx->device_name);
2075                 exit_value |= FSCK_UNCORRECTED;
2076                 exit_value &= ~FSCK_NONDESTRUCT;
2077         }
2078         if (exit_value & FSCK_CANCELED) {
2079                 int     allow_cancellation;
2080
2081                 profile_get_boolean(ctx->profile, "options",
2082                                     "allow_cancellation", 0, 0,
2083                                     &allow_cancellation);
2084                 exit_value &= ~FSCK_NONDESTRUCT;
2085                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2086                     (sb->s_state & EXT2_VALID_FS) &&
2087                     !(sb->s_state & EXT2_ERROR_FS))
2088                         exit_value = 0;
2089         } else
2090                 show_stats(ctx);
2091
2092         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2093
2094         ext2fs_close_free(&ctx->fs);
2095         free(ctx->journal_name);
2096
2097         if (ctx->logf)
2098                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2099         e2fsck_free_context(ctx);
2100         remove_error_table(&et_ext2_error_table);
2101         remove_error_table(&et_prof_error_table);
2102         return exit_value;
2103 }