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 [-pamnyrcdfktvDFV] [-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 #ifdef HAVE_PTHREAD
  87                 " -m                   multiple threads to speedup fsck\n"
  88 #endif
  89                 " -n                   Make no changes to the filesystem\n"
  90                 " -y                   Assume \"yes\" to all questions\n"
  91                 " -c                   Check for bad blocks and add them to the badblock list\n"
  92                 " -f                   Force checking even if filesystem is marked clean\n"));
  93         fprintf(stderr, "%s", _(""
  94                 " -v                   Be verbose\n"
  95                 " -b superblock        Use alternative superblock\n"
  96                 " -B blocksize         Force blocksize when looking for superblock\n"
  97                 " -j external_journal  Set location of the external journal\n"
  98                 " -l bad_blocks_file   Add to badblocks list\n"
  99                 " -L bad_blocks_file   Set badblocks list\n"
 100                 " -z undo_file         Create an undo file\n"
 101                 ));
 102
 103         exit(FSCK_USAGE);
 104 }
 105
 106 static void show_stats(e2fsck_t ctx)
 107 {
 108         ext2_filsys fs = ctx->fs;
 109         ext2_ino_t inodes, inodes_used;
 110         blk64_t blocks, blocks_used;
 111         unsigned int dir_links;
 112         unsigned int num_files, num_links;
 113         __u32 *mask, m;
 114         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 115         int i, j, printed = 0;
 116
 117         dir_links = 2 * ctx->fs_directory_count - 1;
 118         num_files = ctx->fs_total_count - dir_links;
 119         num_links = ctx->fs_links_count - dir_links;
 120         inodes = fs->super->s_inodes_count;
 121         inodes_used = (fs->super->s_inodes_count -
 122                        fs->super->s_free_inodes_count);
 123         blocks = ext2fs_blocks_count(fs->super);
 124         blocks_used = (ext2fs_blocks_count(fs->super) -
 125                        ext2fs_free_blocks_count(fs->super));
 126
 127         if (inodes_used > 0) {
 128                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 129                 frag_percent_file = (frag_percent_file + 5) / 10;
 130
 131                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 132                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 133
 134                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 135                                                 ctx->fs_fragmented_dir))
 136                                       / inodes_used);
 137                 frag_percent_total = (frag_percent_total + 5) / 10;
 138         }
 139
 140         if (!verbose) {
 141                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 142                                "%llu/%llu blocks\n"),
 143                         ctx->device_name, inodes_used, inodes,
 144                         frag_percent_total / 10, frag_percent_total % 10,
 145                         (unsigned long long) blocks_used,
 146                         (unsigned long long) blocks);
 147                 return;
 148         }
 149         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 150                             &i);
 151         if (verbose && i) {
 152                 log_out(ctx, "\nFilesystem features:");
 153                 mask = &ctx->fs->super->s_feature_compat;
 154                 for (i = 0; i < 3; i++, mask++) {
 155                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 156                                 if (*mask & m) {
 157                                         log_out(ctx, " %s",
 158                                                 e2p_feature2string(i, m));
 159                                         printed++;
 160                                 }
 161                         }
 162                 }
 163                 if (printed == 0)
 164                         log_out(ctx, " (none)");
 165                 log_out(ctx, "\n");
 166         }
 167
 168         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 169                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 170                         inodes_used), inodes_used,
 171                 100.0 * inodes_used / inodes, inodes);
 172         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 173                         "%12u non-contiguous files (%0d.%d%%)\n",
 174                         ctx->fs_fragmented),
 175                 ctx->fs_fragmented, frag_percent_file / 10,
 176                 frag_percent_file % 10);
 177         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 178                         "%12u non-contiguous directories (%0d.%d%%)\n",
 179                         ctx->fs_fragmented_dir),
 180                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 181                 frag_percent_dir % 10);
 182         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 183                        "%u/%u/%u\n"),
 184                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 185
 186         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 187                 if (ctx->extent_depth_count[j])
 188                         break;
 189         if (++j) {
 190                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 191                 for (i=0; i < j; i++) {
 192                         if (i)
 193                                 fputc('/', stdout);
 194                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 195                 }
 196                 log_out(ctx, "\n");
 197         }
 198
 199         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 200                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 201                    blocks_used),
 202                 (unsigned long long) blocks_used, 100.0 * blocks_used / blocks,
 203                 (unsigned long long) blocks);
 204         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 205                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 206         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 207                         ctx->large_files), ctx->large_files);
 208         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 209                         ctx->fs_regular_count), ctx->fs_regular_count);
 210         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 211                         ctx->fs_directory_count), ctx->fs_directory_count);
 212         log_out(ctx, P_("%12u character device file\n",
 213                         "%12u character device files\n", ctx->fs_chardev_count),
 214                 ctx->fs_chardev_count);
 215         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 216                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 217         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 218                 ctx->fs_fifo_count);
 219         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 220                 ctx->fs_links_count - dir_links);
 221         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 222                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 223         log_out(ctx, P_(" (%u fast symbolic link)\n",
 224                         " (%u fast symbolic links)\n",
 225                         ctx->fs_fast_symlinks_count),
 226                 ctx->fs_fast_symlinks_count);
 227         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 228                         ctx->fs_sockets_count),
 229                 ctx->fs_sockets_count);
 230         log_out(ctx, "------------\n");
 231         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 232                 num_files);
 233 }
 234
 235 static void check_mount(e2fsck_t ctx)
 236 {
 237         errcode_t       retval;
 238         int             cont;
 239
 240         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 241                                          &ctx->mount_flags);
 242         if (retval) {
 243                 com_err("ext2fs_check_if_mount", retval,
 244                         _("while determining whether %s is mounted."),
 245                         ctx->filesystem_name);
 246                 return;
 247         }
 248
 249         /*
 250          * If the filesystem isn't mounted, or it's the root
 251          * filesystem and it's mounted read-only, and we're not doing
 252          * a read/write check, then everything's fine.
 253          */
 254         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 255             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 256              (ctx->mount_flags & EXT2_MF_READONLY) &&
 257              !(ctx->options & E2F_OPT_WRITECHECK)))
 258                 return;
 259
 260         if (((ctx->options & E2F_OPT_READONLY) ||
 261              ((ctx->options & E2F_OPT_FORCE) &&
 262               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 263             !(ctx->options & E2F_OPT_WRITECHECK)) {
 264                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 265                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 266                                         ctx->filesystem_name);
 267                 else
 268                         log_out(ctx, _("Warning!  %s is in use.\n"),
 269                                         ctx->filesystem_name);
 270                 return;
 271         }
 272
 273         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 274                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 275         else
 276                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 277         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 278                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 279         puts("\007\007\007\007");
 280         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 281                        "The filesystem is mounted.   "
 282                        "If you continue you ***WILL***\n"
 283                        "cause ***SEVERE*** filesystem damage.\n\n"));
 284         puts("\007\007\007");
 285         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 286         if (!cont) {
 287                 printf("%s", _("check aborted.\n"));
 288                 exit (0);
 289         }
 290         return;
 291 }
 292
 293 static int is_on_batt(void)
 294 {
 295         FILE    *f;
 296         DIR     *d;
 297         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 298         unsigned int    acflag;
 299         struct dirent*  de;
 300
 301         f = fopen("/sys/class/power_supply/AC/online", "r");
 302         if (f) {
 303                 if (fscanf(f, "%u\n", &acflag) == 1) {
 304                         fclose(f);
 305                         return (!acflag);
 306                 }
 307                 fclose(f);
 308         }
 309         f = fopen("/proc/apm", "r");
 310         if (f) {
 311                 if (fscanf(f, "%79s %79s %79s %x", tmp, tmp, tmp, &acflag) != 4)
 312                         acflag = 1;
 313                 fclose(f);
 314                 return (acflag != 1);
 315         }
 316         d = opendir("/proc/acpi/ac_adapter");
 317         if (d) {
 318                 while ((de=readdir(d)) != NULL) {
 319                         if (!strncmp(".", de->d_name, 1))
 320                                 continue;
 321                         snprintf(fname, sizeof(fname),
 322                                  "/proc/acpi/ac_adapter/%s/state",
 323                                  de->d_name);
 324                         f = fopen(fname, "r");
 325                         if (!f)
 326                                 continue;
 327                         if (fscanf(f, "%79s %79s", tmp2, tmp) != 2)
 328                                 tmp[0] = 0;
 329                         fclose(f);
 330                         if (strncmp(tmp, "off-line", 8) == 0) {
 331                                 closedir(d);
 332                                 return 1;
 333                         }
 334                 }
 335                 closedir(d);
 336         }
 337         return 0;
 338 }
 339
 340 /*
 341  * This routine checks to see if a filesystem can be skipped; if so,
 342  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 343  * message explaining why a check is being forced.
 344  */
 345 static void check_if_skip(e2fsck_t ctx)
 346 {
 347         ext2_filsys fs = ctx->fs;
 348         struct problem_context pctx;
 349         const char *reason = NULL;
 350         unsigned int reason_arg = 0;
 351         long next_check;
 352         int batt = is_on_batt();
 353         int defer_check_on_battery;
 354         int broken_system_clock;
 355         time_t lastcheck;
 356
 357         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 358                 return;
 359
 360         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 361                             0, 0, &broken_system_clock);
 362         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 363                 broken_system_clock = 1;
 364         profile_get_boolean(ctx->profile, "options",
 365                             "defer_check_on_battery", 0, 1,
 366                             &defer_check_on_battery);
 367         if (!defer_check_on_battery)
 368                 batt = 0;
 369
 370         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 371                 return;
 372
 373         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 374                 goto skip;
 375
 376         lastcheck = fs->super->s_lastcheck;
 377         if (lastcheck > ctx->now)
 378                 lastcheck -= ctx->time_fudge;
 379         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 380             !ext2fs_test_valid(fs))
 381                 reason = _(" contains a file system with errors");
 382         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 383                 reason = _(" was not cleanly unmounted");
 384         else if (check_backup_super_block(ctx))
 385                 reason = _(" primary superblock features different from backup");
 386         else if ((fs->super->s_max_mnt_count > 0) &&
 387                  (fs->super->s_mnt_count >=
 388                   (unsigned) fs->super->s_max_mnt_count)) {
 389                 reason = _(" has been mounted %u times without being checked");
 390                 reason_arg = fs->super->s_mnt_count;
 391                 if (batt && (fs->super->s_mnt_count <
 392                              (unsigned) fs->super->s_max_mnt_count*2))
 393                         reason = 0;
 394         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 395                    (ctx->now < lastcheck)) {
 396                 reason = _(" has filesystem last checked time in the future");
 397                 if (batt)
 398                         reason = 0;
 399         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 400                    ((ctx->now - lastcheck) >=
 401                     ((time_t) fs->super->s_checkinterval))) {
 402                 reason = _(" has gone %u days without being checked");
 403                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 404                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 405                              fs->super->s_checkinterval*2))
 406                         reason = 0;
 407         } else if (broken_system_clock && fs->super->s_checkinterval) {
 408                 log_out(ctx, "%s: ", ctx->device_name);
 409                 log_out(ctx, "%s",
 410                         _("ignoring check interval, broken_system_clock set\n"));
 411         }
 412
 413         if (reason) {
 414                 log_out(ctx, "%s", ctx->device_name);
 415                 log_out(ctx, reason, reason_arg);
 416                 log_out(ctx, "%s", _(", check forced.\n"));
 417                 return;
 418         }
 419
 420         /*
 421          * Update the global counts from the block group counts.  This
 422          * is needed since modern kernels don't update the global
 423          * counts so as to avoid locking the entire file system.  So
 424          * if the filesystem is not unmounted cleanly, the global
 425          * counts may not be accurate.  Update them here if we can,
 426          * for the benefit of users who might examine the file system
 427          * using dumpe2fs.  (This is for cosmetic reasons only.)
 428          */
 429         clear_problem_context(&pctx);
 430         pctx.ino = fs->super->s_free_inodes_count;
 431         pctx.ino2 = ctx->free_inodes;
 432         if ((pctx.ino != pctx.ino2) &&
 433             !(ctx->options & E2F_OPT_READONLY) &&
 434             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 435                 fs->super->s_free_inodes_count = ctx->free_inodes;
 436                 ext2fs_mark_super_dirty(fs);
 437         }
 438         clear_problem_context(&pctx);
 439         pctx.blk = ext2fs_free_blocks_count(fs->super);
 440         pctx.blk2 = ctx->free_blocks;
 441         if ((pctx.blk != pctx.blk2) &&
 442             !(ctx->options & E2F_OPT_READONLY) &&
 443             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 444                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 445                 ext2fs_mark_super_dirty(fs);
 446         }
 447
 448         /* Print the summary message when we're skipping a full check */
 449         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 450                 ctx->device_name,
 451                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 452                 fs->super->s_inodes_count,
 453                 (unsigned long long) ext2fs_blocks_count(fs->super) -
 454                 ext2fs_free_blocks_count(fs->super),
 455                 (unsigned long long) ext2fs_blocks_count(fs->super));
 456         next_check = 100000;
 457         if (fs->super->s_max_mnt_count > 0) {
 458                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 459                 if (next_check <= 0)
 460                         next_check = 1;
 461         }
 462         if (!broken_system_clock && fs->super->s_checkinterval &&
 463             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 464                 next_check = 1;
 465         if (next_check <= 5) {
 466                 if (next_check == 1) {
 467                         if (batt)
 468                                 log_out(ctx, "%s",
 469                                         _(" (check deferred; on battery)"));
 470                         else
 471                                 log_out(ctx, "%s",
 472                                         _(" (check after next mount)"));
 473                 } else
 474                         log_out(ctx, _(" (check in %ld mounts)"),
 475                                 next_check);
 476         }
 477         log_out(ctx, "\n");
 478 skip:
 479         ext2fs_close_free(&ctx->fs);
 480         e2fsck_free_context(ctx);
 481         exit(FSCK_OK);
 482 }
 483
 484 /*
 485  * For completion notice
 486  */
 487 struct percent_tbl {
 488         int     max_pass;
 489         int     table[32];
 490 };
 491 static struct percent_tbl e2fsck_tbl = {
 492         5, { 0, 70, 90, 92,  95, 100 }
 493 };
 494 static char bar[128], spaces[128];
 495
 496 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 497                           int max)
 498 {
 499         float   percent;
 500
 501         if (pass <= 0)
 502                 return 0.0;
 503         if (pass > tbl->max_pass || max == 0)
 504                 return 100.0;
 505         percent = ((float) curr) / ((float) max);
 506         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 507                 + tbl->table[pass-1]);
 508 }
 509
 510 void e2fsck_clear_progbar(e2fsck_t ctx)
 511 {
 512         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 513                 return;
 514
 515         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 516                ctx->stop_meta);
 517         fflush(stdout);
 518         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 519 }
 520
 521 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 522                            unsigned int dpynum)
 523 {
 524         static const char spinner[] = "\\|/-";
 525         int     i;
 526         unsigned int    tick;
 527         struct timeval  tv;
 528         int dpywidth;
 529         int fixed_percent;
 530
 531         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 532                 return 0;
 533
 534         /*
 535          * Calculate the new progress position.  If the
 536          * percentage hasn't changed, then we skip out right
 537          * away.
 538          */
 539         fixed_percent = (int) ((10 * percent) + 0.5);
 540         if (ctx->progress_last_percent == fixed_percent)
 541                 return 0;
 542         ctx->progress_last_percent = fixed_percent;
 543
 544         /*
 545          * If we've already updated the spinner once within
 546          * the last 1/8th of a second, no point doing it
 547          * again.
 548          */
 549         gettimeofday(&tv, NULL);
 550         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 551         if ((tick == ctx->progress_last_time) &&
 552             (fixed_percent != 0) && (fixed_percent != 1000))
 553                 return 0;
 554         ctx->progress_last_time = tick;
 555
 556         /*
 557          * Advance the spinner, and note that the progress bar
 558          * will be on the screen
 559          */
 560         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 561         ctx->flags |= E2F_FLAG_PROG_BAR;
 562
 563         dpywidth = 66 - strlen(label);
 564         dpywidth = 8 * (dpywidth / 8);
 565         if (dpynum)
 566                 dpywidth -= 8;
 567
 568         i = ((percent * dpywidth) + 50) / 100;
 569         printf("%s%s: |%s%s", ctx->start_meta, label,
 570                bar + (sizeof(bar) - (i+1)),
 571                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 572         if (fixed_percent == 1000)
 573                 fputc('|', stdout);
 574         else
 575                 fputc(spinner[ctx->progress_pos & 3], stdout);
 576         printf(" %4.1f%%  ", percent);
 577         if (dpynum)
 578                 printf("%u\r", dpynum);
 579         else
 580                 fputs(" \r", stdout);
 581         fputs(ctx->stop_meta, stdout);
 582
 583         if (fixed_percent == 1000)
 584                 e2fsck_clear_progbar(ctx);
 585         fflush(stdout);
 586
 587         return 0;
 588 }
 589
 590 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 591                                   unsigned long cur, unsigned long max)
 592 {
 593         char buf[1024];
 594         float percent;
 595
 596         if (pass == 0)
 597                 return 0;
 598
 599         if (ctx->progress_fd) {
 600                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 601                          pass, cur, max, ctx->device_name);
 602                 write_all(ctx->progress_fd, buf, strlen(buf));
 603         } else {
 604                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 605                 e2fsck_simple_progress(ctx, ctx->device_name,
 606                                        percent, 0);
 607         }
 608         return 0;
 609 }
 610
 611 #define PATH_SET "PATH=/sbin"
 612
 613 /*
 614  * Make sure 0,1,2 file descriptors are open, so that we don't open
 615  * the filesystem using the same file descriptor as stdout or stderr.
 616  */
 617 static void reserve_stdio_fds(void)
 618 {
 619         int     fd = 0;
 620
 621         while (fd <= 2) {
 622                 fd = open("/dev/null", O_RDWR);
 623                 if (fd < 0) {
 624                         fprintf(stderr, _("ERROR: Couldn't open "
 625                                 "/dev/null (%s)\n"),
 626                                 strerror(errno));
 627                         return;
 628                 }
 629         }
 630         (void) close(fd);
 631 }
 632
 633 #ifdef HAVE_SIGNAL_H
 634 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 635 {
 636         e2fsck_t ctx = e2fsck_global_ctx;
 637
 638         if (!ctx)
 639                 return;
 640
 641         ctx->progress = e2fsck_update_progress;
 642 }
 643
 644 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 645 {
 646         e2fsck_t ctx = e2fsck_global_ctx;
 647
 648         if (!ctx)
 649                 return;
 650
 651         e2fsck_clear_progbar(ctx);
 652         ctx->progress = 0;
 653 }
 654
 655 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 656 {
 657         e2fsck_t ctx = e2fsck_global_ctx;
 658
 659         if (!ctx)
 660                 exit(FSCK_CANCELED);
 661
 662         ctx->flags |= E2F_FLAG_CANCEL;
 663 }
 664 #endif
 665
 666 static void initialize_profile_options(e2fsck_t ctx)
 667 {
 668         char *tmp;
 669
 670         /* [options] shared=preserve|lost+found|delete */
 671         tmp = NULL;
 672         ctx->shared = E2F_SHARED_PRESERVE;
 673         profile_get_string(ctx->profile, "options", "shared", 0,
 674                            "preserve", &tmp);
 675         if (tmp) {
 676                 if (strcmp(tmp, "preserve") == 0)
 677                         ctx->shared = E2F_SHARED_PRESERVE;
 678                 else if (strcmp(tmp, "delete") == 0)
 679                         ctx->shared = E2F_SHARED_DELETE;
 680                 else if (strcmp(tmp, "lost+found") == 0)
 681                         ctx->shared = E2F_SHARED_LPF;
 682                 else {
 683                         com_err(ctx->program_name, 0,
 684                                 _("configuration error: 'shared=%s'"), tmp);
 685                         fatal_error(ctx, 0);
 686                 }
 687                 free(tmp);
 688         }
 689
 690         /* [options] clone=dup|zero */
 691         tmp = NULL;
 692         ctx->clone = E2F_CLONE_DUP;
 693         profile_get_string(ctx->profile, "options", "clone", 0,
 694                            "dup", &tmp);
 695         if (tmp) {
 696                 if (strcmp(tmp, "dup") == 0)
 697                         ctx->clone = E2F_CLONE_DUP;
 698                 else if (strcmp(tmp, "zero") == 0)
 699                         ctx->clone = E2F_CLONE_ZERO;
 700                 else {
 701                         com_err(ctx->program_name, 0,
 702                                 _("configuration error: 'clone=%s'"), tmp);
 703                         fatal_error(ctx, 0);
 704                 }
 705                 free(tmp);
 706         }
 707 }
 708
 709 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 710 {
 711         char    *buf, *token, *next, *p, *arg;
 712         int     ea_ver;
 713         int     extended_usage = 0;
 714         unsigned long long reada_kb;
 715
 716         buf = string_copy(ctx, opts, 0);
 717         for (token = buf; token && *token; token = next) {
 718                 p = strchr(token, ',');
 719                 next = 0;
 720                 if (p) {
 721                         *p = 0;
 722                         next = p+1;
 723                 }
 724                 arg = strchr(token, '=');
 725                 if (arg) {
 726                         *arg = 0;
 727                         arg++;
 728                 }
 729                 if (strcmp(token, "ea_ver") == 0) {
 730                         if (!arg) {
 731                                 extended_usage++;
 732                                 continue;
 733                         }
 734                         ea_ver = strtoul(arg, &p, 0);
 735                         if (*p ||
 736                             ((ea_ver != 1) && (ea_ver != 2))) {
 737                                 fprintf(stderr, "%s",
 738                                         _("Invalid EA version.\n"));
 739                                 extended_usage++;
 740                                 continue;
 741                         }
 742                         ctx->ext_attr_ver = ea_ver;
 743                 } else if (strcmp(token, "readahead_kb") == 0) {
 744                         if (!arg) {
 745                                 extended_usage++;
 746                                 continue;
 747                         }
 748                         reada_kb = strtoull(arg, &p, 0);
 749                         if (*p) {
 750                                 fprintf(stderr, "%s",
 751                                         _("Invalid readahead buffer size.\n"));
 752                                 extended_usage++;
 753                                 continue;
 754                         }
 755                         ctx->readahead_kb = reada_kb;
 756                 } else if (strcmp(token, "fragcheck") == 0) {
 757                         ctx->options |= E2F_OPT_FRAGCHECK;
 758                         continue;
 759                 /* -E shared=preserve|lost+found|delete */
 760                 } else if (strcmp(token, "shared") == 0) {
 761                         if (!arg) {
 762                                 extended_usage++;
 763                                 continue;
 764                         }
 765                         if (strcmp(arg, "preserve") == 0) {
 766                                 ctx->shared = E2F_SHARED_PRESERVE;
 767                         } else if (strcmp(arg, "lost+found") == 0) {
 768                                 ctx->shared = E2F_SHARED_LPF;
 769                         } else if (strcmp(arg, "delete") == 0) {
 770                                 ctx->shared = E2F_SHARED_DELETE;
 771                         } else {
 772                                 extended_usage++;
 773                                 continue;
 774                         }
 775                 /* -E clone=dup|zero */
 776                 } else if (strcmp(token, "clone") == 0) {
 777                         if (!arg) {
 778                                 extended_usage++;
 779                                 continue;
 780                         }
 781                         if (strcmp(arg, "dup") == 0) {
 782                                 ctx->clone = E2F_CLONE_DUP;
 783                         } else if (strcmp(arg, "zero") == 0) {
 784                                 ctx->clone = E2F_CLONE_ZERO;
 785                         } else {
 786                                 extended_usage++;
 787                                 continue;
 788                         }
 789                 } else if (strcmp(token, "expand_extra_isize") == 0) {
 790                         ctx->flags |= E2F_FLAG_EXPAND_EISIZE;
 791                         if (arg) {
 792                                 extended_usage++;
 793                                 continue;
 794                         }
 795                 } else if (strcmp(token, "journal_only") == 0) {
 796                         if (arg) {
 797                                 extended_usage++;
 798                                 continue;
 799                         }
 800                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 801                 } else if (strcmp(token, "discard") == 0) {
 802                         ctx->options |= E2F_OPT_DISCARD;
 803                         continue;
 804                 } else if (strcmp(token, "nodiscard") == 0) {
 805                         ctx->options &= ~E2F_OPT_DISCARD;
 806                         continue;
 807                 } else if (strcmp(token, "optimize_extents") == 0) {
 808                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 809                         continue;
 810                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 811                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 812                         continue;
 813                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 814                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 815                         continue;
 816                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 817                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 818                         continue;
 819                 } else if (strcmp(token, "log_filename") == 0) {
 820                         if (!arg)
 821                                 extended_usage++;
 822                         else
 823                                 ctx->log_fn = string_copy(ctx, arg, 0);
 824                         continue;
 825                 } else if (strcmp(token, "problem_log") == 0) {
 826                         if (!arg)
 827                                 extended_usage++;
 828                         else
 829                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 830                         continue;
 831                 } else if (strcmp(token, "bmap2extent") == 0) {
 832                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 833                         continue;
 834                 } else if (strcmp(token, "fixes_only") == 0) {
 835                         ctx->options |= E2F_OPT_FIXES_ONLY;
 836                         continue;
 837                 } else if (strcmp(token, "unshare_blocks") == 0) {
 838                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 839                         ctx->options |= E2F_OPT_FORCE;
 840                         continue;
 841                 } else if (strcmp(token, "check_encoding") == 0) {
 842                         ctx->options |= E2F_OPT_CHECK_ENCODING;
 843                         continue;
 844 #ifdef CONFIG_DEVELOPER_FEATURES
 845                 } else if (strcmp(token, "clear_all_uninit_bits") == 0) {
 846                         ctx->options |= E2F_OPT_CLEAR_UNINIT;
 847                         continue;
 848 #endif
 849                 } else {
 850                         fprintf(stderr, _("Unknown extended option: %s\n"),
 851                                 token);
 852                         extended_usage++;
 853                 }
 854         }
 855         free(buf);
 856
 857         if (extended_usage) {
 858                 fputs(_("\nExtended options are separated by commas, "
 859                        "and may take an argument which\n"
 860                        "is set off by an equals ('=') sign.  "
 861                        "Valid extended options are:\n\n"), stderr);
 862                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 863                 fputs("\tfragcheck\n", stderr);
 864                 fputs("\tjournal_only\n", stderr);
 865                 fputs("\tdiscard\n", stderr);
 866                 fputs("\tnodiscard\n", stderr);
 867                 fputs(("\tshared=<preserve|lost+found|delete>\n"), stderr);
 868                 fputs(("\tclone=<dup|zero>\n"), stderr);
 869                 fputs(("\texpand_extra_isize\n"), stderr);
 870                 fputs("\toptimize_extents\n", stderr);
 871                 fputs("\tno_optimize_extents\n", stderr);
 872                 fputs("\tinode_count_fullmap\n", stderr);
 873                 fputs("\tno_inode_count_fullmap\n", stderr);
 874                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 875                 fputs("\tbmap2extent\n", stderr);
 876                 fputs("\tunshare_blocks\n", stderr);
 877                 fputs("\tfixes_only\n", stderr);
 878                 fputs("\tcheck_encoding\n", stderr);
 879                 fputc('\n', stderr);
 880                 exit(1);
 881         }
 882 }
 883
 884 static void syntax_err_report(const char *filename, long err, int line_num)
 885 {
 886         fprintf(stderr,
 887                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 888                 filename, line_num, error_message(err));
 889         exit(FSCK_ERROR);
 890 }
 891
 892 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 893
 894 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 895 {
 896         int             flush = 0;
 897         int             c, fd;
 898 #ifdef MTRACE
 899         extern void     *mallwatch;
 900 #endif
 901         e2fsck_t        ctx;
 902         errcode_t       retval;
 903 #ifdef HAVE_SIGNAL_H
 904         struct sigaction        sa;
 905 #endif
 906         char            *cp;
 907         int             res;            /* result of sscanf */
 908 #ifdef CONFIG_JBD_DEBUG
 909         char            *jbd_debug;
 910 #endif
 911 #ifdef HAVE_PTHREAD
 912         char            *pm;
 913         unsigned long   thread_num;
 914 #endif
 915         unsigned long long phys_mem_kb, blk;
 916
 917         retval = e2fsck_allocate_context(&ctx);
 918         if (retval)
 919                 return retval;
 920
 921         *ret_ctx = ctx;
 922         e2fsck_global_ctx = ctx;
 923
 924         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 925         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 926         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 927                 ctx->interactive = 1;
 928         } else {
 929                 ctx->start_meta[0] = '\001';
 930                 ctx->stop_meta[0] = '\002';
 931         }
 932         memset(bar, '=', sizeof(bar)-1);
 933         memset(spaces, ' ', sizeof(spaces)-1);
 934         add_error_table(&et_ext2_error_table);
 935         add_error_table(&et_prof_error_table);
 936         blkid_get_cache(&ctx->blkid, NULL);
 937
 938         if (argc && *argv)
 939                 ctx->program_name = *argv;
 940         else
 941                 usage(NULL);
 942
 943         cp = getenv("E2FSCK_CONFIG");
 944         if (cp != NULL)
 945                 config_fn[0] = cp;
 946         profile_set_syntax_err_cb(syntax_err_report);
 947         profile_init(config_fn, &ctx->profile);
 948
 949         initialize_profile_options(ctx);
 950
 951         phys_mem_kb = get_memory_size() / 1024;
 952         ctx->readahead_kb = ~0ULL;
 953
 954 #ifdef HAVE_PTHREAD
 955         while ((c = getopt(argc, argv, "pam:nyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 956 #else
 957         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 958 #endif
 959                 switch (c) {
 960                 case 'C':
 961                         ctx->progress = e2fsck_update_progress;
 962                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 963                         if (res != 1)
 964                                 goto sscanf_err;
 965
 966                         if (ctx->progress_fd < 0) {
 967                                 ctx->progress = 0;
 968                                 ctx->progress_fd = ctx->progress_fd * -1;
 969                         }
 970                         if (!ctx->progress_fd)
 971                                 break;
 972                         /* Validate the file descriptor to avoid disasters */
 973                         fd = dup(ctx->progress_fd);
 974                         if (fd < 0) {
 975                                 fprintf(stderr,
 976                                 _("Error validating file descriptor %d: %s\n"),
 977                                         ctx->progress_fd,
 978                                         error_message(errno));
 979                                 fatal_error(ctx,
 980                         _("Invalid completion information file descriptor"));
 981                         } else
 982                                 close(fd);
 983                         break;
 984                 case 'D':
 985                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 986                         break;
 987                 case 'E':
 988                         parse_extended_opts(ctx, optarg);
 989                         break;
 990                 case 'p':
 991                 case 'a':
 992                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 993                         conflict_opt:
 994                                 fatal_error(ctx,
 995         _("Only one of the options -p/-a, -n or -y may be specified."));
 996                         }
 997                         ctx->options |= E2F_OPT_PREEN;
 998                         break;
 999 #ifdef HAVE_PTHREAD
1000                 case 'm':
1001                         thread_num = strtoul(optarg, &pm, 0);
1002                         if (*pm)
1003                                 fatal_error(ctx,
1004                                         _("Invalid multiple thread num.\n"));
1005                         if (thread_num > E2FSCK_MAX_THREADS) {
1006                                 fprintf(stderr,
1007                                         _("threads %lu too large (max %u)\n"),
1008                                         thread_num, E2FSCK_MAX_THREADS);
1009                                 fatal_error(ctx, 0);
1010                         }
1011                         ctx->options |= E2F_OPT_MULTITHREAD;
1012                         ctx->pfs_num_threads = thread_num;
1013                         break;
1014 #endif
1015                 case 'n':
1016                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
1017                                 goto conflict_opt;
1018                         ctx->options |= E2F_OPT_NO;
1019                         break;
1020                 case 'y':
1021                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
1022                                 goto conflict_opt;
1023                         ctx->options |= E2F_OPT_YES;
1024                         break;
1025                 case 't':
1026 #ifdef RESOURCE_TRACK
1027                         if (ctx->options & E2F_OPT_TIME)
1028                                 ctx->options |= E2F_OPT_TIME2;
1029                         else
1030                                 ctx->options |= E2F_OPT_TIME;
1031 #else
1032                         fprintf(stderr, _("The -t option is not "
1033                                 "supported on this version of e2fsck.\n"));
1034 #endif
1035                         break;
1036                 case 'c':
1037                         if (cflag++)
1038                                 ctx->options |= E2F_OPT_WRITECHECK;
1039                         ctx->options |= E2F_OPT_CHECKBLOCKS;
1040                         break;
1041                 case 'r':
1042                         /* What we do by default, anyway! */
1043                         break;
1044                 case 'b':
1045                         res = sscanf(optarg, "%llu", &blk);
1046                         ctx->use_superblock = blk;
1047                         if (res != 1)
1048                                 goto sscanf_err;
1049                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
1050                         break;
1051                 case 'B':
1052                         ctx->blocksize = atoi(optarg);
1053                         break;
1054                 case 'I':
1055                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
1056                         if (res != 1)
1057                                 goto sscanf_err;
1058                         break;
1059                 case 'j':
1060                         ctx->journal_name = get_devname(ctx->blkid,
1061                                                         optarg, NULL);
1062                         if (!ctx->journal_name) {
1063                                 com_err(ctx->program_name, 0,
1064                                         _("Unable to resolve '%s'"),
1065                                         optarg);
1066                                 fatal_error(ctx, 0);
1067                         }
1068                         break;
1069                 case 'P':
1070                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
1071                         if (res != 1)
1072                                 goto sscanf_err;
1073                         break;
1074                 case 'L':
1075                         replace_bad_blocks++;
1076                         /* fall through */
1077                 case 'l':
1078                         if (bad_blocks_file)
1079                                 free(bad_blocks_file);
1080                         bad_blocks_file = string_copy(ctx, optarg, 0);
1081                         break;
1082                 case 'd':
1083                         ctx->options |= E2F_OPT_DEBUG;
1084                         break;
1085                 case 'f':
1086                         ctx->options |= E2F_OPT_FORCE;
1087                         break;
1088                 case 'F':
1089                         flush = 1;
1090                         break;
1091                 case 'v':
1092                         verbose = 1;
1093                         break;
1094                 case 'V':
1095                         show_version_only = 1;
1096                         break;
1097 #ifdef MTRACE
1098                 case 'M':
1099                         mallwatch = (void *) strtol(optarg, NULL, 0);
1100                         break;
1101 #endif
1102                 case 'N':
1103                         ctx->device_name = string_copy(ctx, optarg, 0);
1104                         break;
1105                 case 'k':
1106                         keep_bad_blocks++;
1107                         break;
1108                 case 'z':
1109                         ctx->undo_file = optarg;
1110                         break;
1111                 default:
1112                         usage(ctx);
1113                 }
1114         if (show_version_only)
1115                 return 0;
1116         if (optind != argc - 1)
1117                 usage(ctx);
1118         if ((ctx->options & E2F_OPT_NO) &&
1119             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1120                 com_err(ctx->program_name, 0, "%s",
1121                         _("The -n and -D options are incompatible."));
1122                 fatal_error(ctx, 0);
1123         }
1124         if ((ctx->options & E2F_OPT_NO) && cflag) {
1125                 com_err(ctx->program_name, 0, "%s",
1126                         _("The -n and -c options are incompatible."));
1127                 fatal_error(ctx, 0);
1128         }
1129         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1130                 com_err(ctx->program_name, 0, "%s",
1131                         _("The -n and -l/-L options are incompatible."));
1132                 fatal_error(ctx, 0);
1133         }
1134 #ifdef HAVE_PTHREAD
1135         if (ctx->options & E2F_OPT_MULTITHREAD) {
1136                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1137                         com_err(ctx->program_name, 0, "%s",
1138                                 _("The -m option should be used together with one of -p/-y/-n options."));
1139                         fatal_error(ctx, 0);
1140                 }
1141         }
1142 #endif
1143         if (ctx->options & E2F_OPT_NO)
1144                 ctx->options |= E2F_OPT_READONLY;
1145
1146         ctx->io_options = strchr(argv[optind], '?');
1147         if (ctx->io_options)
1148                 *ctx->io_options++ = 0;
1149         ctx->filesystem_name = get_devname(ctx->blkid, argv[optind], 0);
1150         if (!ctx->filesystem_name) {
1151                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1152                         argv[optind]);
1153                 fatal_error(ctx, 0);
1154         }
1155
1156         /* Complain about mutually exclusive rebuilding activities */
1157         if (getenv("E2FSCK_FIXES_ONLY"))
1158                 ctx->options |= E2F_OPT_FIXES_ONLY;
1159         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1160             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1161                 com_err(ctx->program_name, 0, "%s",
1162                         _("The -D and -E fixes_only options are incompatible."));
1163                 fatal_error(ctx, 0);
1164         }
1165         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1166             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1167                 com_err(ctx->program_name, 0, "%s",
1168                         _("The -E bmap2extent and fixes_only options are incompatible."));
1169                 fatal_error(ctx, 0);
1170         }
1171
1172         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1173                             &c);
1174         if (c)
1175                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1176         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1177                             &c);
1178         if (c)
1179                 verbose = 1;
1180
1181         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1182                             0, 0, &c);
1183         if (c)
1184                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1185
1186         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1187                             0, 0, &c);
1188         if (c)
1189                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1190
1191         if (ctx->readahead_kb == ~0ULL) {
1192                 profile_get_integer(ctx->profile, "options",
1193                                     "readahead_mem_pct", 0, -1, &c);
1194                 if (c >= 0 && c <= 100)
1195                         ctx->readahead_kb = phys_mem_kb * c / 100;
1196                 profile_get_integer(ctx->profile, "options",
1197                                     "readahead_kb", 0, -1, &c);
1198                 if (c >= 0)
1199                         ctx->readahead_kb = c;
1200                 if (ctx->readahead_kb != ~0ULL &&
1201                     ctx->readahead_kb > phys_mem_kb)
1202                         ctx->readahead_kb = phys_mem_kb;
1203         }
1204
1205         /* Turn off discard in read-only mode */
1206         if ((ctx->options & E2F_OPT_NO) &&
1207             (ctx->options & E2F_OPT_DISCARD))
1208                 ctx->options &= ~E2F_OPT_DISCARD;
1209
1210         if (flush) {
1211                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1212                 if (fd < 0) {
1213                         com_err("open", errno,
1214                                 _("while opening %s for flushing"),
1215                                 ctx->filesystem_name);
1216                         fatal_error(ctx, 0);
1217                 }
1218                 if ((retval = ext2fs_sync_device(fd, 1))) {
1219                         com_err("ext2fs_sync_device", retval,
1220                                 _("while trying to flush %s"),
1221                                 ctx->filesystem_name);
1222                         fatal_error(ctx, 0);
1223                 }
1224                 close(fd);
1225         }
1226         if (cflag && bad_blocks_file) {
1227                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1228                                         "be both used at the same time.\n"));
1229                 exit(FSCK_USAGE);
1230         }
1231 #ifdef HAVE_SIGNAL_H
1232         /*
1233          * Set up signal action
1234          */
1235         memset(&sa, 0, sizeof(struct sigaction));
1236         sa.sa_handler = signal_cancel;
1237         sigaction(SIGINT, &sa, 0);
1238         sigaction(SIGTERM, &sa, 0);
1239 #ifdef SA_RESTART
1240         sa.sa_flags = SA_RESTART;
1241 #endif
1242         sa.sa_handler = signal_progress_on;
1243         sigaction(SIGUSR1, &sa, 0);
1244         sa.sa_handler = signal_progress_off;
1245         sigaction(SIGUSR2, &sa, 0);
1246 #endif
1247
1248         /* Update our PATH to include /sbin if we need to run badblocks  */
1249         if (cflag) {
1250                 char *oldpath = getenv("PATH");
1251                 char *newpath;
1252                 int len = sizeof(PATH_SET) + 1;
1253
1254                 if (oldpath)
1255                         len += strlen(oldpath);
1256
1257                 newpath = malloc(len);
1258                 if (!newpath)
1259                         fatal_error(ctx, "Couldn't malloc() newpath");
1260                 strcpy(newpath, PATH_SET);
1261
1262                 if (oldpath) {
1263                         strcat(newpath, ":");
1264                         strcat(newpath, oldpath);
1265                 }
1266                 putenv(newpath);
1267         }
1268 #ifdef CONFIG_JBD_DEBUG
1269         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1270         if (jbd_debug) {
1271                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1272                 if (res != 1) {
1273                         fprintf(stderr,
1274                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1275                                 jbd_debug);
1276                         exit (1);
1277                 }
1278         }
1279 #endif
1280         return 0;
1281
1282 sscanf_err:
1283         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1284                 c, optarg);
1285         exit (1);
1286 }
1287
1288 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1289                              ext2_filsys *ret_fs)
1290 {
1291         errcode_t retval;
1292
1293         *ret_fs = NULL;
1294
1295         if (ctx->superblock) {
1296                 unsigned long blocksize = ctx->blocksize;
1297
1298                 if (!blocksize) {
1299                         for (blocksize = EXT2_MIN_BLOCK_SIZE;
1300                              blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1301
1302                                 retval = ext2fs_open2(ctx->filesystem_name,
1303                                                       ctx->io_options, flags,
1304                                                       ctx->superblock, blocksize,
1305                                                       unix_io_manager, ret_fs);
1306                                 if (*ret_fs) {
1307                                         ext2fs_free(*ret_fs);
1308                                         *ret_fs = NULL;
1309                                 }
1310                                 if (!retval)
1311                                         break;
1312                         }
1313                         if (retval)
1314                                 return retval;
1315                 }
1316
1317                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1318                                       flags, ctx->superblock, blocksize,
1319                                       io_ptr, ret_fs);
1320         } else
1321                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1322                                       flags, 0, 0, io_ptr, ret_fs);
1323
1324         if (retval == 0) {
1325                 (*ret_fs)->priv_data = ctx;
1326                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1327                                        "default", NULL);
1328         }
1329         return retval;
1330 }
1331
1332 static const char *my_ver_string = E2FSPROGS_VERSION;
1333 static const char *my_ver_date = E2FSPROGS_DATE;
1334
1335 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1336 {
1337         struct mmp_struct *mmp_s;
1338         unsigned int mmp_check_interval;
1339         errcode_t retval = 0;
1340         struct problem_context pctx;
1341         unsigned int wait_time = 0;
1342
1343         clear_problem_context(&pctx);
1344         if (fs->mmp_buf == NULL) {
1345                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1346                 if (retval)
1347                         goto check_error;
1348         }
1349
1350         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1351         if (retval)
1352                 goto check_error;
1353
1354         mmp_s = fs->mmp_buf;
1355
1356         mmp_check_interval = fs->super->s_mmp_update_interval;
1357         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1358                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1359
1360         /*
1361          * If check_interval in MMP block is larger, use that instead of
1362          * check_interval from the superblock.
1363          */
1364         if (mmp_s->mmp_check_interval > mmp_check_interval)
1365                 mmp_check_interval = mmp_s->mmp_check_interval;
1366
1367         wait_time = mmp_check_interval * 2 + 1;
1368
1369         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1370                 retval = 0;
1371         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1372                 retval = EXT2_ET_MMP_FSCK_ON;
1373         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1374                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1375
1376         if (retval)
1377                 goto check_error;
1378
1379         /* Print warning if e2fsck will wait for more than 20 secs. */
1380         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1381                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1382                                "time is %u seconds. Please wait...\n"),
1383                         mmp_check_interval, wait_time * 2);
1384         }
1385
1386         return 0;
1387
1388 check_error:
1389
1390         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1391                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1392                         fs->super->s_mmp_block = 0;
1393                         ext2fs_mark_super_dirty(fs);
1394                         retval = 0;
1395                 }
1396         } else if (retval == EXT2_ET_MMP_FAILED) {
1397                 com_err(ctx->program_name, retval, "%s",
1398                         _("while checking MMP block"));
1399                 dump_mmp_msg(fs->mmp_buf, NULL);
1400         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1401                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1402                 com_err(ctx->program_name, retval, "%s",
1403                         _("while checking MMP block"));
1404                 dump_mmp_msg(fs->mmp_buf,
1405                              _("If you are sure the filesystem is not "
1406                                "in use on any node, run:\n"
1407                                "'tune2fs -f -E clear_mmp %s'\n"),
1408                              ctx->device_name);
1409         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1410                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1411                         ext2fs_mmp_clear(fs);
1412                         retval = 0;
1413                 }
1414         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1415                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1416                         ext2fs_mmp_clear(fs);
1417                         retval = 0;
1418                 }
1419         } else
1420                 com_err(ctx->program_name, retval, "%s",
1421                         _("while reading MMP block"));
1422         return retval;
1423 }
1424
1425 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1426 {
1427         errcode_t retval = ENOMEM;
1428         char *tdb_dir = NULL, *tdb_file = NULL;
1429         char *dev_name, *tmp_name;
1430         int free_tdb_dir = 0;
1431
1432         /* (re)open a specific undo file */
1433         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1434                 retval = set_undo_io_backing_manager(*io_ptr);
1435                 if (retval)
1436                         goto err;
1437                 *io_ptr = undo_io_manager;
1438                 retval = set_undo_io_backup_file(ctx->undo_file);
1439                 if (retval)
1440                         goto err;
1441                 printf(_("Overwriting existing filesystem; this can be undone "
1442                          "using the command:\n"
1443                          "    e2undo %s %s\n\n"),
1444                         ctx->undo_file, ctx->filesystem_name);
1445                 return retval;
1446         }
1447
1448         /*
1449          * Configuration via a conf file would be
1450          * nice
1451          */
1452         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1453         if (!tdb_dir) {
1454                 profile_get_string(ctx->profile, "defaults",
1455                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1456                                    &tdb_dir);
1457                 free_tdb_dir = 1;
1458         }
1459
1460         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1461             access(tdb_dir, W_OK)) {
1462                 if (free_tdb_dir)
1463                         free(tdb_dir);
1464                 return 0;
1465         }
1466
1467         tmp_name = strdup(ctx->filesystem_name);
1468         if (!tmp_name)
1469                 goto errout;
1470         dev_name = basename(tmp_name);
1471         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1472         if (!tdb_file) {
1473                 free(tmp_name);
1474                 goto errout;
1475         }
1476         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1477         free(tmp_name);
1478
1479         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1480                 retval = errno;
1481                 com_err(ctx->program_name, retval,
1482                         _("while trying to delete %s"), tdb_file);
1483                 goto errout;
1484         }
1485
1486         retval = set_undo_io_backing_manager(*io_ptr);
1487         if (retval)
1488                 goto errout;
1489         *io_ptr = undo_io_manager;
1490         retval = set_undo_io_backup_file(tdb_file);
1491         if (retval)
1492                 goto errout;
1493         printf(_("Overwriting existing filesystem; this can be undone "
1494                  "using the command:\n"
1495                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1496
1497         if (free_tdb_dir)
1498                 free(tdb_dir);
1499         free(tdb_file);
1500         return 0;
1501
1502 errout:
1503         if (free_tdb_dir)
1504                 free(tdb_dir);
1505         free(tdb_file);
1506 err:
1507         com_err(ctx->program_name, retval, "%s",
1508                 _("while trying to setup undo file\n"));
1509         return retval;
1510 }
1511
1512 int main (int argc, char *argv[])
1513 {
1514         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1515         int             exit_value = FSCK_OK;
1516         ext2_filsys     fs = 0;
1517         io_manager      io_ptr;
1518         struct ext2_super_block *sb;
1519         const char      *lib_ver_date;
1520         int             my_ver, lib_ver;
1521         e2fsck_t        ctx;
1522         blk64_t         orig_superblock = ~(blk64_t)0;
1523         struct problem_context pctx;
1524         int flags, run_result, was_changed;
1525         int journal_size;
1526         int sysval, sys_page_size = 4096;
1527         int old_bitmaps;
1528         __u32 features[3];
1529         char *cp;
1530         enum quota_type qtype;
1531         struct ext2fs_journal_params jparams;
1532
1533         clear_problem_context(&pctx);
1534         sigcatcher_setup();
1535 #ifdef MTRACE
1536         mtrace();
1537 #endif
1538 #ifdef MCHECK
1539         mcheck(0);
1540 #endif
1541 #ifdef ENABLE_NLS
1542         setlocale(LC_MESSAGES, "");
1543         setlocale(LC_CTYPE, "");
1544         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1545         textdomain(NLS_CAT_NAME);
1546         set_com_err_gettext(gettext);
1547 #endif
1548         my_ver = ext2fs_parse_version_string(my_ver_string);
1549         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1550         if (my_ver > lib_ver) {
1551                 fprintf( stderr, "%s",
1552                          _("Error: ext2fs library version out of date!\n"));
1553                 show_version_only++;
1554         }
1555
1556         retval = PRS(argc, argv, &ctx);
1557         if (retval) {
1558                 com_err("e2fsck", retval, "%s",
1559                         _("while trying to initialize program"));
1560                 exit(FSCK_ERROR);
1561         }
1562         reserve_stdio_fds();
1563
1564         ctx->global_ctx = NULL;
1565         set_up_logging(ctx);
1566         if (ctx->logf) {
1567                 int i;
1568
1569                 fputs("E2fsck run: ", ctx->logf);
1570                 for (i = 0; i < argc; i++) {
1571                         if (i)
1572                                 fputc(' ', ctx->logf);
1573                         fputs(argv[i], ctx->logf);
1574                 }
1575                 fputc('\n', ctx->logf);
1576         }
1577         if (ctx->problem_logf) {
1578                 int i;
1579
1580                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1581                       ctx->problem_logf);
1582                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1583                         (unsigned long) ctx->now);
1584                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1585                         argv[0]);
1586                 for (i = 1; i < argc; i++)
1587                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1588                 fputs("/>\n", ctx->problem_logf);
1589         }
1590
1591         init_resource_track(&ctx->global_rtrack, NULL);
1592         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1593                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1594                          my_ver_date);
1595
1596         if (show_version_only) {
1597                 log_err(ctx, _("\tUsing %s, %s\n"),
1598                         error_message(EXT2_ET_BASE), lib_ver_date);
1599                 exit(FSCK_OK);
1600         }
1601
1602         check_mount(ctx);
1603
1604         if (!(ctx->options & E2F_OPT_PREEN) &&
1605             !(ctx->options & E2F_OPT_NO) &&
1606             !(ctx->options & E2F_OPT_YES)) {
1607                 if (!ctx->interactive)
1608                         fatal_error(ctx,
1609                                     _("need terminal for interactive repairs"));
1610         }
1611         ctx->superblock = ctx->use_superblock;
1612
1613         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1614 restart:
1615 #ifdef CONFIG_TESTIO_DEBUG
1616         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1617                 io_ptr = test_io_manager;
1618                 test_io_backing_manager = unix_io_manager;
1619         } else
1620 #endif
1621                 io_ptr = unix_io_manager;
1622         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1623         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1624                             &old_bitmaps);
1625         if (!old_bitmaps)
1626                 flags |= EXT2_FLAG_64BITS;
1627         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1628                 flags |= EXT2_FLAG_RW;
1629                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1630                       ctx->mount_flags & EXT2_MF_READONLY))
1631                         flags |= EXT2_FLAG_EXCLUSIVE;
1632                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1633                     (ctx->options & E2F_OPT_FORCE))
1634                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1635         }
1636
1637         if (ctx->undo_file) {
1638                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1639                 if (retval)
1640                         exit(FSCK_ERROR);
1641         }
1642
1643         ctx->openfs_flags = flags;
1644         ctx->io_manager = io_ptr;
1645         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1646
1647         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1648             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1649             ((retval == EXT2_ET_BAD_MAGIC) ||
1650              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1651              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1652              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1653                 if (retval) {
1654                         pctx.errcode = retval;
1655                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1656                 }
1657                 if (retval2) {
1658                         pctx.errcode = retval2;
1659                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1660                 }
1661                 pctx.errcode = 0;
1662                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1663                         retval = retval2;
1664                         goto failure;
1665                 }
1666                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1667                         ext2fs_free(fs);
1668                         fs = NULL;
1669                 }
1670                 if (!fs || (fs->group_desc_count > 1)) {
1671                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1672                                 ctx->program_name,
1673                                 retval ? _("Superblock invalid,") :
1674                                 _("Group descriptors look bad..."));
1675                         orig_superblock = ctx->superblock;
1676                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1677                         if (fs)
1678                                 ext2fs_close_free(&fs);
1679                         orig_retval = retval;
1680                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1681                         if ((orig_retval == 0) && retval != 0) {
1682                                 if (fs)
1683                                         ext2fs_close_free(&fs);
1684                                 log_out(ctx, _("%s: %s while using the "
1685                                                "backup blocks"),
1686                                         ctx->program_name,
1687                                         error_message(retval));
1688                                 log_out(ctx, _("%s: going back to original "
1689                                                "superblock\n"),
1690                                         ctx->program_name);
1691                                 ctx->superblock = orig_superblock;
1692                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1693                         }
1694                 }
1695         }
1696         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1697              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1698             fs && fs->super) {
1699                 sb = fs->super;
1700                 features[0] = (sb->s_feature_compat &
1701                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1702                 features[1] = (sb->s_feature_incompat &
1703                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1704                 features[2] = (sb->s_feature_ro_compat &
1705                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1706                 if (features[0] || features[1] || features[2])
1707                         goto print_unsupp_features;
1708         }
1709 failure:
1710         if (retval) {
1711                 if (orig_retval)
1712                         retval = orig_retval;
1713                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1714                         ctx->filesystem_name);
1715                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1716                         log_out(ctx, "%s",
1717                                 _("The filesystem revision is apparently "
1718                                   "too high for this version of e2fsck.\n"
1719                                   "(Or the filesystem superblock "
1720                                   "is corrupt)\n\n"));
1721                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1722                 } else if (retval == EXT2_ET_SHORT_READ)
1723                         log_out(ctx, "%s",
1724                                 _("Could this be a zero-length partition?\n"));
1725                 else if ((retval == EPERM) || (retval == EACCES))
1726                         log_out(ctx, _("You must have %s access to the "
1727                                        "filesystem or be root\n"),
1728                                (ctx->options & E2F_OPT_READONLY) ?
1729                                "r/o" : "r/w");
1730                 else if (retval == ENXIO)
1731                         log_out(ctx, "%s",
1732                                 _("Possibly non-existent or swap device?\n"));
1733                 else if (retval == EBUSY)
1734                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1735                                          "exclusively by another program?\n"));
1736                 else if (retval == ENOENT)
1737                         log_out(ctx, "%s",
1738                                 _("Possibly non-existent device?\n"));
1739 #ifdef EROFS
1740                 else if (retval == EROFS)
1741                         log_out(ctx, "%s", _("Disk write-protected; use the "
1742                                              "-n option to do a read-only\n"
1743                                              "check of the device.\n"));
1744 #endif
1745                 else {
1746                         /*
1747                          * Let's try once more will less consistency checking
1748                          * so that we are able to recover from more errors
1749                          * (e.g. some tool messing up some value in the sb).
1750                          */
1751                         if (((retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1752                              (retval == EXT2_ET_BAD_DESC_SIZE)) &&
1753                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1754                                 if (fs)
1755                                         ext2fs_close_free(&fs);
1756                                 log_out(ctx, _("%s: Trying to load superblock "
1757                                         "despite errors...\n"),
1758                                         ctx->program_name);
1759                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1760                                 /*
1761                                  * If we tried backup sb, revert to the
1762                                  * original one now.
1763                                  */
1764                                 if (orig_superblock != ~(blk64_t)0)
1765                                         ctx->superblock = orig_superblock;
1766                                 goto restart;
1767                         }
1768                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1769                         if (retval == EXT2_ET_BAD_MAGIC)
1770                                 check_plausibility(ctx->filesystem_name,
1771                                                    CHECK_FS_EXIST, NULL);
1772                 }
1773                 fatal_error(ctx, 0);
1774         }
1775         /*
1776          * We only update the master superblock because (a) paranoia;
1777          * we don't want to corrupt the backup superblocks, and (b) we
1778          * don't need to update the mount count and last checked
1779          * fields in the backup superblock (the kernel doesn't update
1780          * the backup superblocks anyway).  With newer versions of the
1781          * library this flag is set by ext2fs_open2(), but we set this
1782          * here just to be sure.  (No, we don't support e2fsck running
1783          * with some other libext2fs than the one that it was shipped
1784          * with, but just in case....)
1785          */
1786         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1787
1788         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1789                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1790                 int need_restart = 0;
1791
1792                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1793                                                        blocksize,
1794                                                        &ctx->num_blocks);
1795                 /*
1796                  * The floppy driver refuses to allow anyone else to
1797                  * open the device if has been opened with O_EXCL;
1798                  * this is unlike other block device drivers in Linux.
1799                  * To handle this, we close the filesystem and then
1800                  * reopen the filesystem after we get the device size.
1801                  */
1802                 if (pctx.errcode == EBUSY) {
1803                         ext2fs_close_free(&fs);
1804                         need_restart++;
1805                         pctx.errcode =
1806                                 ext2fs_get_device_size2(ctx->filesystem_name,
1807                                                         blocksize,
1808                                                         &ctx->num_blocks);
1809                 }
1810                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1811                         ctx->num_blocks = 0;
1812                 else if (pctx.errcode) {
1813                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1814                         ctx->flags |= E2F_FLAG_ABORT;
1815                         fatal_error(ctx, 0);
1816                 }
1817                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1818                 if (need_restart)
1819                         goto restart;
1820         }
1821
1822         ctx->fs = fs;
1823         fs->now = ctx->now;
1824 #ifdef HAVE_PTHREAD
1825         fs->fs_num_threads = ctx->pfs_num_threads;
1826 #endif
1827         sb = fs->super;
1828
1829         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1830                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1831                         _("while trying to open %s"),
1832                         ctx->filesystem_name);
1833         get_newer:
1834                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1835         }
1836
1837         /*
1838          * Set the device name, which is used whenever we print error
1839          * or informational messages to the user.
1840          */
1841         if (ctx->device_name == 0 && sb->s_volume_name[0])
1842                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1843                                                sizeof(sb->s_volume_name));
1844
1845         if (ctx->device_name == 0)
1846                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1847         for (cp = ctx->device_name; *cp; cp++)
1848                 if (isspace(*cp) || *cp == ':')
1849                         *cp = '_';
1850
1851         if (ctx->problem_logf) {
1852
1853                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1854                         ctx->filesystem_name);
1855                 if (!uuid_is_null(sb->s_uuid)) {
1856                         char buf[48];
1857
1858                         uuid_unparse(sb->s_uuid, buf);
1859                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1860                 }
1861                 if (sb->s_volume_name[0])
1862                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1863                                 EXT2_LEN_STR(sb->s_volume_name));
1864
1865                 fputs("/>\n", ctx->problem_logf);
1866         }
1867
1868         ehandler_init(fs->io);
1869
1870         if (ext2fs_has_feature_mmp(fs->super) &&
1871             (flags & EXT2_FLAG_SKIP_MMP)) {
1872                 if (e2fsck_check_mmp(fs, ctx))
1873                         fatal_error(ctx, 0);
1874
1875                 /*
1876                  * Restart in order to reopen fs but this time start mmp.
1877                  */
1878                 ext2fs_close_free(&ctx->fs);
1879                 flags &= ~EXT2_FLAG_SKIP_MMP;
1880                 goto restart;
1881         }
1882
1883         if (ctx->logf)
1884                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1885                         e2p_uuid2str(sb->s_uuid));
1886
1887         /*
1888          * Make sure the ext3 superblock fields are consistent.
1889          */
1890         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1891                 retval = e2fsck_check_ext3_journal(ctx);
1892                 if (retval) {
1893                         com_err(ctx->program_name, retval,
1894                                 _("while checking journal for %s"),
1895                                 ctx->device_name);
1896                         fatal_error(ctx,
1897                                 _("Cannot proceed with file system check"));
1898                 }
1899         }
1900
1901         /*
1902          * Check to see if we need to do ext3-style recovery.  If so,
1903          * do it, and then restart the fsck.
1904          */
1905         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1906                 if (ctx->options & E2F_OPT_READONLY) {
1907                         log_out(ctx, "%s",
1908                                 _("Warning: skipping journal recovery because "
1909                                   "doing a read-only filesystem check.\n"));
1910                         io_channel_flush(ctx->fs->io);
1911                 } else {
1912                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1913                                 /*
1914                                  * Whoops, we attempted to run the
1915                                  * journal twice.  This should never
1916                                  * happen, unless the hardware or
1917                                  * device driver is being bogus.
1918                                  */
1919                                 com_err(ctx->program_name, 0,
1920                                         _("unable to set superblock flags "
1921                                           "on %s\n"), ctx->device_name);
1922                                 fatal_error(ctx, 0);
1923                         }
1924                         retval = e2fsck_run_ext3_journal(ctx);
1925                         if (retval == EFSBADCRC) {
1926                                 log_out(ctx, _("Journal checksum error "
1927                                                "found in %s\n"),
1928                                         ctx->device_name);
1929                         } else if (retval == EFSCORRUPTED) {
1930                                 log_out(ctx, _("Journal corrupted in %s\n"),
1931                                         ctx->device_name);
1932                         } else if (retval) {
1933                                 com_err(ctx->program_name, retval,
1934                                 _("while recovering journal of %s"),
1935                                         ctx->device_name);
1936                         }
1937                         ext2fs_close_free(&ctx->fs);
1938                         ctx->flags |= E2F_FLAG_RESTARTED;
1939                         goto restart;
1940                 }
1941         }
1942
1943         /*
1944          * Check for compatibility with the feature sets.  We need to
1945          * be more stringent than ext2fs_open().
1946          */
1947         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1948         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1949         features[2] = (sb->s_feature_ro_compat &
1950                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1951 print_unsupp_features:
1952         if (features[0] || features[1] || features[2]) {
1953                 int     i, j;
1954                 __u32   *mask = features, m;
1955
1956                 log_err(ctx, _("%s has unsupported feature(s):"),
1957                         ctx->filesystem_name);
1958
1959                 for (i=0; i <3; i++,mask++) {
1960                         for (j=0,m=1; j < 32; j++, m<<=1) {
1961                                 if (*mask & m)
1962                                         log_err(ctx, " %s",
1963                                                 e2p_feature2string(i, m));
1964                         }
1965                 }
1966                 log_err(ctx, "\n");
1967                 goto get_newer;
1968         }
1969
1970         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1971                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1972                         ctx->filesystem_name, sb->s_encoding);
1973                 goto get_newer;
1974         }
1975
1976         /*
1977          * If the user specified a specific superblock, presumably the
1978          * master superblock has been trashed.  So we mark the
1979          * superblock as dirty, so it can be written out.
1980          */
1981         if (ctx->superblock &&
1982             !(ctx->options & E2F_OPT_READONLY))
1983                 ext2fs_mark_super_dirty(fs);
1984
1985         /*
1986          * Calculate the number of filesystem blocks per pagesize.  If
1987          * fs->blocksize > page_size, set the number of blocks per
1988          * pagesize to 1 to avoid division by zero errors.
1989          */
1990 #ifdef _SC_PAGESIZE
1991         sysval = sysconf(_SC_PAGESIZE);
1992         if (sysval > 0)
1993                 sys_page_size = sysval;
1994 #endif /* _SC_PAGESIZE */
1995         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1996         if (ctx->blocks_per_page == 0)
1997                 ctx->blocks_per_page = 1;
1998
1999         if (ctx->superblock)
2000                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
2001         ext2fs_mark_valid(fs);
2002         check_super_block(ctx);
2003         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2004                 fatal_error(ctx, 0);
2005         check_if_skip(ctx);
2006
2007         if (EXT2_GOOD_OLD_INODE_SIZE + sb->s_want_extra_isize >
2008                                                         EXT2_INODE_SIZE(sb)) {
2009                 if (fix_problem(ctx, PR_0_WANT_EXTRA_ISIZE_INVALID, &pctx))
2010                         sb->s_want_extra_isize =
2011                                 sizeof(struct ext2_inode_large) -
2012                                 EXT2_GOOD_OLD_INODE_SIZE;
2013         }
2014         if (EXT2_GOOD_OLD_INODE_SIZE + sb->s_min_extra_isize >
2015                                                         EXT2_INODE_SIZE(sb)) {
2016                 if (fix_problem(ctx, PR_0_MIN_EXTRA_ISIZE_INVALID, &pctx))
2017                         sb->s_min_extra_isize = 0;
2018         }
2019         if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
2020                 ctx->want_extra_isize = sizeof(struct ext2_inode_large) -
2021                                                      EXT2_GOOD_OLD_INODE_SIZE;
2022                 ctx->min_extra_isize = ~0L;
2023                 if (EXT2_HAS_RO_COMPAT_FEATURE(sb,
2024                                        EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) {
2025                         if (ctx->want_extra_isize < sb->s_want_extra_isize)
2026                                 ctx->want_extra_isize = sb->s_want_extra_isize;
2027                         if (ctx->want_extra_isize < sb->s_min_extra_isize)
2028                                 ctx->want_extra_isize = sb->s_min_extra_isize;
2029                 }
2030         } else {
2031                 /* Leave extra_isize set, it is harmless, and clearing it
2032                  * here breaks some regression tests by printing an extra
2033                  * message to the output for very little value. */
2034                 sb->s_want_extra_isize = 0;
2035                 sb->s_min_extra_isize = 0;
2036                 ctx->flags &= ~E2F_FLAG_EXPAND_EISIZE;
2037         }
2038
2039         if (ctx->options & E2F_OPT_READONLY) {
2040                 if (ctx->flags & (E2F_FLAG_EXPAND_EISIZE)) {
2041                         fprintf(stderr, _("Cannot enable EXTRA_ISIZE feature "
2042                                           "on read-only filesystem\n"));
2043                         exit(1);
2044                 }
2045         } else {
2046                 if (sb->s_want_extra_isize > sb->s_min_extra_isize &&
2047                     (sb->s_feature_ro_compat &
2048                      EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE))
2049                         ctx->flags |= E2F_FLAG_EXPAND_EISIZE;
2050         }
2051
2052         check_resize_inode(ctx);
2053         if (bad_blocks_file)
2054                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
2055         else if (cflag)
2056                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
2057         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2058                 fatal_error(ctx, 0);
2059
2060         /*
2061          * Mark the system as valid, 'til proven otherwise
2062          */
2063         ext2fs_mark_valid(fs);
2064
2065         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
2066         if (retval) {
2067                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
2068                         ctx->program_name, error_message(retval));
2069                 preenhalt(ctx);
2070                 log_out(ctx, "%s", _("This doesn't bode well, "
2071                                      "but we'll try to go on...\n"));
2072         }
2073
2074         /*
2075          * Save the journal size in megabytes.
2076          * Try and use the journal size from the backup else let e2fsck
2077          * find the default journal size. If fast commit feature is enabled,
2078          * it is not clear how many of the journal blocks were fast commit
2079          * blocks. So, ignore the size of journal found in backup.
2080          *
2081          * TODO: Add a new backup type that captures fast commit info as
2082          * well.
2083          */
2084         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
2085                 !ext2fs_has_feature_fast_commit(sb))
2086                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
2087                                (sb->s_jnl_blocks[16] >> 20);
2088         else
2089                 journal_size = -1;
2090
2091         if (ext2fs_has_feature_quota(sb)) {
2092                 /* Quotas were enabled. Do quota accounting during fsck. */
2093                 clear_problem_context(&pctx);
2094                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
2095                 if (pctx.errcode) {
2096                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
2097                         fatal_error(ctx, 0);
2098                 }
2099         }
2100
2101         run_result = e2fsck_run(ctx);
2102         e2fsck_clear_progbar(ctx);
2103
2104         if (!ctx->invalid_bitmaps &&
2105             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
2106                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
2107                         if (journal_size < 1024) {
2108                                 ext2fs_get_journal_params(&jparams, fs);
2109                         } else {
2110                                 jparams.num_journal_blocks = journal_size;
2111                                 jparams.num_fc_blocks = 0;
2112                         }
2113                         log_out(ctx, _("Creating journal (%d blocks): "),
2114                                jparams.num_journal_blocks);
2115                         fflush(stdout);
2116                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
2117                         if (retval) {
2118                                 log_out(ctx, "%s: while trying to create "
2119                                         "journal\n", error_message(retval));
2120                                 goto no_journal;
2121                         }
2122                         log_out(ctx, "%s", _(" Done.\n"));
2123                         log_out(ctx, "%s",
2124                                 _("\n*** journal has been regenerated ***\n"));
2125                 }
2126         }
2127 no_journal:
2128
2129         if (run_result & E2F_FLAG_ABORT) {
2130                 fatal_error(ctx, _("aborted"));
2131         } else if (run_result & E2F_FLAG_CANCEL) {
2132                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
2133                         ctx->device_name : ctx->filesystem_name);
2134                 exit_value |= FSCK_CANCELED;
2135         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
2136                 int needs_writeout;
2137
2138                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
2139                         if (*quota_sb_inump(sb, qtype) == 0)
2140                                 continue;
2141                         needs_writeout = 0;
2142                         pctx.num = qtype;
2143                         retval = quota_compare_and_update(ctx->qctx, qtype,
2144                                                           &needs_writeout);
2145                         if ((retval || needs_writeout) &&
2146                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
2147                                 pctx.errcode = quota_write_inode(ctx->qctx,
2148                                                                  1 << qtype);
2149                                 if (pctx.errcode)
2150                                         (void) fix_problem(ctx,
2151                                                 PR_6_WRITE_QUOTAS, &pctx);
2152                         }
2153                 }
2154                 quota_release_context(&ctx->qctx);
2155         }
2156
2157         if (run_result == E2F_FLAG_RESTART) {
2158                 log_out(ctx, "%s",
2159                         _("Restarting e2fsck from the beginning...\n"));
2160                 retval = e2fsck_reset_context(ctx);
2161                 if (retval) {
2162                         com_err(ctx->program_name, retval, "%s",
2163                                 _("while resetting context"));
2164                         fatal_error(ctx, 0);
2165                 }
2166                 ext2fs_close_free(&ctx->fs);
2167                 goto restart;
2168         }
2169
2170 #ifdef MTRACE
2171         mtrace_print("Cleanup");
2172 #endif
2173         was_changed = ext2fs_test_changed(fs);
2174         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2175             !(ctx->options & E2F_OPT_READONLY)) {
2176                 if (ext2fs_test_valid(fs)) {
2177                         if (!(sb->s_state & EXT2_VALID_FS))
2178                                 exit_value |= FSCK_NONDESTRUCT;
2179                         sb->s_state = EXT2_VALID_FS;
2180                         if (check_backup_super_block(ctx))
2181                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2182                 } else
2183                         sb->s_state &= ~EXT2_VALID_FS;
2184                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2185                         sb->s_lastcheck = ctx->now;
2186                 sb->s_mnt_count = 0;
2187                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2188                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2189                 if (pctx.errcode)
2190                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2191                 ext2fs_mark_super_dirty(fs);
2192         }
2193
2194         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2195             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2196             (ctx->options & E2F_OPT_NO))
2197                 /* Don't try to write or flush I/O, we just wanted to know whether or
2198                  * not there were enough free blocks to undo deduplication.
2199                  */
2200                 goto skip_write;
2201
2202         if (!(ctx->options & E2F_OPT_READONLY)) {
2203                 e2fsck_write_bitmaps(ctx);
2204                 if (fs->flags & EXT2_FLAG_DIRTY) {
2205                         pctx.errcode = ext2fs_flush(ctx->fs);
2206                         if (pctx.errcode)
2207                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2208                 }
2209                 pctx.errcode = io_channel_flush(ctx->fs->io);
2210                 if (pctx.errcode)
2211                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2212         }
2213
2214         if (was_changed) {
2215                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2216
2217                 if (fs_fixed)
2218                         exit_value |= FSCK_NONDESTRUCT;
2219                 if (!(ctx->options & E2F_OPT_PREEN)) {
2220 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2221                         log_out(ctx, fs_fixed ?
2222                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2223                                   "CORRECTED *****\n") :
2224                                 _("%s: File system was modified.\n"),
2225                                 ctx->device_name);
2226 #else
2227                         log_out(ctx,
2228                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2229                                 ctx->device_name);
2230 #endif
2231                 }
2232                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2233                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2234                                 ctx->device_name);
2235                         exit_value |= FSCK_REBOOT;
2236                 }
2237         }
2238
2239 skip_write:
2240         if (!ext2fs_test_valid(fs) ||
2241             ((exit_value & FSCK_CANCELED) &&
2242              (sb->s_state & EXT2_ERROR_FS))) {
2243                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2244                                "errors **********\n\n"), ctx->device_name);
2245                 exit_value |= FSCK_UNCORRECTED;
2246                 exit_value &= ~FSCK_NONDESTRUCT;
2247         }
2248         if (exit_value & FSCK_CANCELED) {
2249                 int     allow_cancellation;
2250
2251                 profile_get_boolean(ctx->profile, "options",
2252                                     "allow_cancellation", 0, 0,
2253                                     &allow_cancellation);
2254                 exit_value &= ~FSCK_NONDESTRUCT;
2255                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2256                     (sb->s_state & EXT2_VALID_FS) &&
2257                     !(sb->s_state & EXT2_ERROR_FS))
2258                         exit_value = 0;
2259         } else
2260                 show_stats(ctx);
2261
2262         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2263
2264         ext2fs_close_free(&ctx->fs);
2265         free(ctx->journal_name);
2266
2267         if (ctx->logf)
2268                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2269         e2fsck_free_context(ctx);
2270         remove_error_table(&et_ext2_error_table);
2271         remove_error_table(&et_prof_error_table);
2272         return exit_value;
2273 }