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 "e2fsck.h"
  56 #include "problem.h"
  57 #include "jfs_user.h"
  58 #include "../version.h"
  59
  60 /* Command line options */
  61 static int cflag;               /* check disk */
  62 static int show_version_only;
  63 static int verbose;
  64
  65 static int replace_bad_blocks;
  66 static int keep_bad_blocks;
  67 static char *bad_blocks_file;
  68
  69 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  70
  71 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
  72 int journal_enable_debug = -1;
  73 #endif
  74
  75 static void usage(e2fsck_t ctx)
  76 {
  77         fprintf(stderr,
  78                 _("Usage: %s [-pamnyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  79                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  80                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  81                 ctx->program_name);
  82
  83         fprintf(stderr, "%s", _("\nEmergency help:\n"
  84                 " -p                   Automatic repair (no questions)\n"
  85                 " -m                   multiple threads to speedup fsck\n"
  86                 " -n                   Make no changes to the filesystem\n"
  87                 " -y                   Assume \"yes\" to all questions\n"
  88                 " -c                   Check for bad blocks and add them to the badblock list\n"
  89                 " -f                   Force checking even if filesystem is marked clean\n"));
  90         fprintf(stderr, "%s", _(""
  91                 " -v                   Be verbose\n"
  92                 " -b superblock        Use alternative superblock\n"
  93                 " -B blocksize         Force blocksize when looking for superblock\n"
  94                 " -j external_journal  Set location of the external journal\n"
  95                 " -l bad_blocks_file   Add to badblocks list\n"
  96                 " -L bad_blocks_file   Set badblocks list\n"
  97                 " -z undo_file         Create an undo file\n"
  98                 ));
  99
 100         exit(FSCK_USAGE);
 101 }
 102
 103 static void show_stats(e2fsck_t ctx)
 104 {
 105         ext2_filsys fs = ctx->fs;
 106         ext2_ino_t inodes, inodes_used;
 107         blk64_t blocks, blocks_used;
 108         unsigned int dir_links;
 109         unsigned int num_files, num_links;
 110         __u32 *mask, m;
 111         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 112         int i, j, printed = 0;
 113
 114         dir_links = 2 * ctx->fs_directory_count - 1;
 115         num_files = ctx->fs_total_count - dir_links;
 116         num_links = ctx->fs_links_count - dir_links;
 117         inodes = fs->super->s_inodes_count;
 118         inodes_used = (fs->super->s_inodes_count -
 119                        fs->super->s_free_inodes_count);
 120         blocks = ext2fs_blocks_count(fs->super);
 121         blocks_used = (ext2fs_blocks_count(fs->super) -
 122                        ext2fs_free_blocks_count(fs->super));
 123
 124         if (inodes_used > 0) {
 125                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 126                 frag_percent_file = (frag_percent_file + 5) / 10;
 127
 128                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 129                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 130
 131                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 132                                                 ctx->fs_fragmented_dir))
 133                                       / inodes_used);
 134                 frag_percent_total = (frag_percent_total + 5) / 10;
 135         }
 136
 137         if (!verbose) {
 138                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 139                                "%llu/%llu blocks\n"),
 140                         ctx->device_name, inodes_used, inodes,
 141                         frag_percent_total / 10, frag_percent_total % 10,
 142                         (unsigned long long) blocks_used,
 143                         (unsigned long long) blocks);
 144                 return;
 145         }
 146         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 147                             &i);
 148         if (verbose && i) {
 149                 log_out(ctx, "\nFilesystem features:");
 150                 mask = &ctx->fs->super->s_feature_compat;
 151                 for (i = 0; i < 3; i++, mask++) {
 152                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 153                                 if (*mask & m) {
 154                                         log_out(ctx, " %s",
 155                                                 e2p_feature2string(i, m));
 156                                         printed++;
 157                                 }
 158                         }
 159                 }
 160                 if (printed == 0)
 161                         log_out(ctx, " (none)");
 162                 log_out(ctx, "\n");
 163         }
 164
 165         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 166                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 167                         inodes_used), inodes_used,
 168                 100.0 * inodes_used / inodes, inodes);
 169         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 170                         "%12u non-contiguous files (%0d.%d%%)\n",
 171                         ctx->fs_fragmented),
 172                 ctx->fs_fragmented, frag_percent_file / 10,
 173                 frag_percent_file % 10);
 174         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 175                         "%12u non-contiguous directories (%0d.%d%%)\n",
 176                         ctx->fs_fragmented_dir),
 177                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 178                 frag_percent_dir % 10);
 179         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 180                        "%u/%u/%u\n"),
 181                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 182
 183         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 184                 if (ctx->extent_depth_count[j])
 185                         break;
 186         if (++j) {
 187                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 188                 for (i=0; i < j; i++) {
 189                         if (i)
 190                                 fputc('/', stdout);
 191                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 192                 }
 193                 log_out(ctx, "\n");
 194         }
 195
 196         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 197                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 198                    blocks_used),
 199                 (unsigned long long) blocks_used, 100.0 * blocks_used / blocks,
 200                 (unsigned long long) blocks);
 201         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 202                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 203         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 204                         ctx->large_files), ctx->large_files);
 205         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 206                         ctx->fs_regular_count), ctx->fs_regular_count);
 207         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 208                         ctx->fs_directory_count), ctx->fs_directory_count);
 209         log_out(ctx, P_("%12u character device file\n",
 210                         "%12u character device files\n", ctx->fs_chardev_count),
 211                 ctx->fs_chardev_count);
 212         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 213                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 214         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 215                 ctx->fs_fifo_count);
 216         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 217                 ctx->fs_links_count - dir_links);
 218         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 219                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 220         log_out(ctx, P_(" (%u fast symbolic link)\n",
 221                         " (%u fast symbolic links)\n",
 222                         ctx->fs_fast_symlinks_count),
 223                 ctx->fs_fast_symlinks_count);
 224         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 225                         ctx->fs_sockets_count),
 226                 ctx->fs_sockets_count);
 227         log_out(ctx, "------------\n");
 228         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 229                 num_files);
 230 }
 231
 232 static void check_mount(e2fsck_t ctx)
 233 {
 234         errcode_t       retval;
 235         int             cont;
 236
 237         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 238                                          &ctx->mount_flags);
 239         if (retval) {
 240                 com_err("ext2fs_check_if_mount", retval,
 241                         _("while determining whether %s is mounted."),
 242                         ctx->filesystem_name);
 243                 return;
 244         }
 245
 246         /*
 247          * If the filesystem isn't mounted, or it's the root
 248          * filesystem and it's mounted read-only, and we're not doing
 249          * a read/write check, then everything's fine.
 250          */
 251         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 252             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 253              (ctx->mount_flags & EXT2_MF_READONLY) &&
 254              !(ctx->options & E2F_OPT_WRITECHECK)))
 255                 return;
 256
 257         if (((ctx->options & E2F_OPT_READONLY) ||
 258              ((ctx->options & E2F_OPT_FORCE) &&
 259               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 260             !(ctx->options & E2F_OPT_WRITECHECK)) {
 261                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 262                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 263                                         ctx->filesystem_name);
 264                 else
 265                         log_out(ctx, _("Warning!  %s is in use.\n"),
 266                                         ctx->filesystem_name);
 267                 return;
 268         }
 269
 270         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 271                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 272         else
 273                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 274         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 275                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 276         puts("\007\007\007\007");
 277         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 278                        "The filesystem is mounted.   "
 279                        "If you continue you ***WILL***\n"
 280                        "cause ***SEVERE*** filesystem damage.\n\n"));
 281         puts("\007\007\007");
 282         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 283         if (!cont) {
 284                 printf("%s", _("check aborted.\n"));
 285                 exit (0);
 286         }
 287         return;
 288 }
 289
 290 static int is_on_batt(void)
 291 {
 292         FILE    *f;
 293         DIR     *d;
 294         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 295         unsigned int    acflag;
 296         struct dirent*  de;
 297
 298         f = fopen("/sys/class/power_supply/AC/online", "r");
 299         if (f) {
 300                 if (fscanf(f, "%u\n", &acflag) == 1) {
 301                         fclose(f);
 302                         return (!acflag);
 303                 }
 304                 fclose(f);
 305         }
 306         f = fopen("/proc/apm", "r");
 307         if (f) {
 308                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 309                         acflag = 1;
 310                 fclose(f);
 311                 return (acflag != 1);
 312         }
 313         d = opendir("/proc/acpi/ac_adapter");
 314         if (d) {
 315                 while ((de=readdir(d)) != NULL) {
 316                         if (!strncmp(".", de->d_name, 1))
 317                                 continue;
 318                         snprintf(fname, sizeof(fname),
 319                                  "/proc/acpi/ac_adapter/%s/state",
 320                                  de->d_name);
 321                         f = fopen(fname, "r");
 322                         if (!f)
 323                                 continue;
 324                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 325                                 tmp[0] = 0;
 326                         fclose(f);
 327                         if (strncmp(tmp, "off-line", 8) == 0) {
 328                                 closedir(d);
 329                                 return 1;
 330                         }
 331                 }
 332                 closedir(d);
 333         }
 334         return 0;
 335 }
 336
 337 /*
 338  * This routine checks to see if a filesystem can be skipped; if so,
 339  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 340  * message explaining why a check is being forced.
 341  */
 342 static void check_if_skip(e2fsck_t ctx)
 343 {
 344         ext2_filsys fs = ctx->fs;
 345         struct problem_context pctx;
 346         const char *reason = NULL;
 347         unsigned int reason_arg = 0;
 348         long next_check;
 349         int batt = is_on_batt();
 350         int defer_check_on_battery;
 351         int broken_system_clock;
 352         time_t lastcheck;
 353
 354         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 355                 return;
 356
 357         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 358                             0, 0, &broken_system_clock);
 359         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 360                 broken_system_clock = 1;
 361         profile_get_boolean(ctx->profile, "options",
 362                             "defer_check_on_battery", 0, 1,
 363                             &defer_check_on_battery);
 364         if (!defer_check_on_battery)
 365                 batt = 0;
 366
 367         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 368                 return;
 369
 370         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 371                 goto skip;
 372
 373         lastcheck = fs->super->s_lastcheck;
 374         if (lastcheck > ctx->now)
 375                 lastcheck -= ctx->time_fudge;
 376         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 377             !ext2fs_test_valid(fs))
 378                 reason = _(" contains a file system with errors");
 379         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 380                 reason = _(" was not cleanly unmounted");
 381         else if (check_backup_super_block(ctx))
 382                 reason = _(" primary superblock features different from backup");
 383         else if ((fs->super->s_max_mnt_count > 0) &&
 384                  (fs->super->s_mnt_count >=
 385                   (unsigned) fs->super->s_max_mnt_count)) {
 386                 reason = _(" has been mounted %u times without being checked");
 387                 reason_arg = fs->super->s_mnt_count;
 388                 if (batt && (fs->super->s_mnt_count <
 389                              (unsigned) fs->super->s_max_mnt_count*2))
 390                         reason = 0;
 391         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 392                    (ctx->now < lastcheck)) {
 393                 reason = _(" has filesystem last checked time in the future");
 394                 if (batt)
 395                         reason = 0;
 396         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 397                    ((ctx->now - lastcheck) >=
 398                     ((time_t) fs->super->s_checkinterval))) {
 399                 reason = _(" has gone %u days without being checked");
 400                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 401                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 402                              fs->super->s_checkinterval*2))
 403                         reason = 0;
 404         } else if (broken_system_clock && fs->super->s_checkinterval) {
 405                 log_out(ctx, "%s: ", ctx->device_name);
 406                 log_out(ctx, "%s",
 407                         _("ignoring check interval, broken_system_clock set\n"));
 408         }
 409
 410         if (reason) {
 411                 log_out(ctx, "%s", ctx->device_name);
 412                 log_out(ctx, reason, reason_arg);
 413                 log_out(ctx, "%s", _(", check forced.\n"));
 414                 return;
 415         }
 416
 417         /*
 418          * Update the global counts from the block group counts.  This
 419          * is needed since modern kernels don't update the global
 420          * counts so as to avoid locking the entire file system.  So
 421          * if the filesystem is not unmounted cleanly, the global
 422          * counts may not be accurate.  Update them here if we can,
 423          * for the benefit of users who might examine the file system
 424          * using dumpe2fs.  (This is for cosmetic reasons only.)
 425          */
 426         clear_problem_context(&pctx);
 427         pctx.ino = fs->super->s_free_inodes_count;
 428         pctx.ino2 = ctx->free_inodes;
 429         if ((pctx.ino != pctx.ino2) &&
 430             !(ctx->options & E2F_OPT_READONLY) &&
 431             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 432                 fs->super->s_free_inodes_count = ctx->free_inodes;
 433                 ext2fs_mark_super_dirty(fs);
 434         }
 435         clear_problem_context(&pctx);
 436         pctx.blk = ext2fs_free_blocks_count(fs->super);
 437         pctx.blk2 = ctx->free_blocks;
 438         if ((pctx.blk != pctx.blk2) &&
 439             !(ctx->options & E2F_OPT_READONLY) &&
 440             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 441                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 442                 ext2fs_mark_super_dirty(fs);
 443         }
 444
 445         /* Print the summary message when we're skipping a full check */
 446         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 447                 ctx->device_name,
 448                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 449                 fs->super->s_inodes_count,
 450                 (unsigned long long) ext2fs_blocks_count(fs->super) -
 451                 ext2fs_free_blocks_count(fs->super),
 452                 (unsigned long long) ext2fs_blocks_count(fs->super));
 453         next_check = 100000;
 454         if (fs->super->s_max_mnt_count > 0) {
 455                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 456                 if (next_check <= 0)
 457                         next_check = 1;
 458         }
 459         if (!broken_system_clock && fs->super->s_checkinterval &&
 460             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 461                 next_check = 1;
 462         if (next_check <= 5) {
 463                 if (next_check == 1) {
 464                         if (batt)
 465                                 log_out(ctx, "%s",
 466                                         _(" (check deferred; on battery)"));
 467                         else
 468                                 log_out(ctx, "%s",
 469                                         _(" (check after next mount)"));
 470                 } else
 471                         log_out(ctx, _(" (check in %ld mounts)"),
 472                                 next_check);
 473         }
 474         log_out(ctx, "\n");
 475 skip:
 476         ext2fs_close_free(&ctx->fs);
 477         e2fsck_free_context(ctx);
 478         exit(FSCK_OK);
 479 }
 480
 481 /*
 482  * For completion notice
 483  */
 484 struct percent_tbl {
 485         int     max_pass;
 486         int     table[32];
 487 };
 488 static struct percent_tbl e2fsck_tbl = {
 489         5, { 0, 70, 90, 92,  95, 100 }
 490 };
 491 static char bar[128], spaces[128];
 492
 493 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 494                           int max)
 495 {
 496         float   percent;
 497
 498         if (pass <= 0)
 499                 return 0.0;
 500         if (pass > tbl->max_pass || max == 0)
 501                 return 100.0;
 502         percent = ((float) curr) / ((float) max);
 503         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 504                 + tbl->table[pass-1]);
 505 }
 506
 507 void e2fsck_clear_progbar(e2fsck_t ctx)
 508 {
 509         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 510                 return;
 511
 512         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 513                ctx->stop_meta);
 514         fflush(stdout);
 515         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 516 }
 517
 518 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 519                            unsigned int dpynum)
 520 {
 521         static const char spinner[] = "\\|/-";
 522         int     i;
 523         unsigned int    tick;
 524         struct timeval  tv;
 525         int dpywidth;
 526         int fixed_percent;
 527
 528         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 529                 return 0;
 530
 531         /*
 532          * Calculate the new progress position.  If the
 533          * percentage hasn't changed, then we skip out right
 534          * away.
 535          */
 536         fixed_percent = (int) ((10 * percent) + 0.5);
 537         if (ctx->progress_last_percent == fixed_percent)
 538                 return 0;
 539         ctx->progress_last_percent = fixed_percent;
 540
 541         /*
 542          * If we've already updated the spinner once within
 543          * the last 1/8th of a second, no point doing it
 544          * again.
 545          */
 546         gettimeofday(&tv, NULL);
 547         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 548         if ((tick == ctx->progress_last_time) &&
 549             (fixed_percent != 0) && (fixed_percent != 1000))
 550                 return 0;
 551         ctx->progress_last_time = tick;
 552
 553         /*
 554          * Advance the spinner, and note that the progress bar
 555          * will be on the screen
 556          */
 557         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 558         ctx->flags |= E2F_FLAG_PROG_BAR;
 559
 560         dpywidth = 66 - strlen(label);
 561         dpywidth = 8 * (dpywidth / 8);
 562         if (dpynum)
 563                 dpywidth -= 8;
 564
 565         i = ((percent * dpywidth) + 50) / 100;
 566         printf("%s%s: |%s%s", ctx->start_meta, label,
 567                bar + (sizeof(bar) - (i+1)),
 568                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 569         if (fixed_percent == 1000)
 570                 fputc('|', stdout);
 571         else
 572                 fputc(spinner[ctx->progress_pos & 3], stdout);
 573         printf(" %4.1f%%  ", percent);
 574         if (dpynum)
 575                 printf("%u\r", dpynum);
 576         else
 577                 fputs(" \r", stdout);
 578         fputs(ctx->stop_meta, stdout);
 579
 580         if (fixed_percent == 1000)
 581                 e2fsck_clear_progbar(ctx);
 582         fflush(stdout);
 583
 584         return 0;
 585 }
 586
 587 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 588                                   unsigned long cur, unsigned long max)
 589 {
 590         char buf[1024];
 591         float percent;
 592
 593         if (pass == 0)
 594                 return 0;
 595
 596         if (ctx->progress_fd) {
 597                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 598                          pass, cur, max, ctx->device_name);
 599                 write_all(ctx->progress_fd, buf, strlen(buf));
 600         } else {
 601                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 602                 e2fsck_simple_progress(ctx, ctx->device_name,
 603                                        percent, 0);
 604         }
 605         return 0;
 606 }
 607
 608 #define PATH_SET "PATH=/sbin"
 609
 610 /*
 611  * Make sure 0,1,2 file descriptors are open, so that we don't open
 612  * the filesystem using the same file descriptor as stdout or stderr.
 613  */
 614 static void reserve_stdio_fds(void)
 615 {
 616         int     fd = 0;
 617
 618         while (fd <= 2) {
 619                 fd = open("/dev/null", O_RDWR);
 620                 if (fd < 0) {
 621                         fprintf(stderr, _("ERROR: Couldn't open "
 622                                 "/dev/null (%s)\n"),
 623                                 strerror(errno));
 624                         return;
 625                 }
 626         }
 627         (void) close(fd);
 628 }
 629
 630 #ifdef HAVE_SIGNAL_H
 631 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 632 {
 633         e2fsck_t ctx = e2fsck_global_ctx;
 634
 635         if (!ctx)
 636                 return;
 637
 638         ctx->progress = e2fsck_update_progress;
 639 }
 640
 641 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 642 {
 643         e2fsck_t ctx = e2fsck_global_ctx;
 644
 645         if (!ctx)
 646                 return;
 647
 648         e2fsck_clear_progbar(ctx);
 649         ctx->progress = 0;
 650 }
 651
 652 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 653 {
 654         e2fsck_t ctx = e2fsck_global_ctx;
 655
 656         if (!ctx)
 657                 exit(FSCK_CANCELED);
 658
 659         ctx->flags |= E2F_FLAG_CANCEL;
 660 }
 661 #endif
 662
 663 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 664 {
 665         char    *buf, *token, *next, *p, *arg;
 666         int     ea_ver;
 667         int     extended_usage = 0;
 668         unsigned long long reada_kb;
 669
 670         buf = string_copy(ctx, opts, 0);
 671         for (token = buf; token && *token; token = next) {
 672                 p = strchr(token, ',');
 673                 next = 0;
 674                 if (p) {
 675                         *p = 0;
 676                         next = p+1;
 677                 }
 678                 arg = strchr(token, '=');
 679                 if (arg) {
 680                         *arg = 0;
 681                         arg++;
 682                 }
 683                 if (strcmp(token, "ea_ver") == 0) {
 684                         if (!arg) {
 685                                 extended_usage++;
 686                                 continue;
 687                         }
 688                         ea_ver = strtoul(arg, &p, 0);
 689                         if (*p ||
 690                             ((ea_ver != 1) && (ea_ver != 2))) {
 691                                 fprintf(stderr, "%s",
 692                                         _("Invalid EA version.\n"));
 693                                 extended_usage++;
 694                                 continue;
 695                         }
 696                         ctx->ext_attr_ver = ea_ver;
 697                 } else if (strcmp(token, "readahead_kb") == 0) {
 698                         if (!arg) {
 699                                 extended_usage++;
 700                                 continue;
 701                         }
 702                         reada_kb = strtoull(arg, &p, 0);
 703                         if (*p) {
 704                                 fprintf(stderr, "%s",
 705                                         _("Invalid readahead buffer size.\n"));
 706                                 extended_usage++;
 707                                 continue;
 708                         }
 709                         ctx->readahead_kb = reada_kb;
 710                 } else if (strcmp(token, "fragcheck") == 0) {
 711                         ctx->options |= E2F_OPT_FRAGCHECK;
 712                         continue;
 713                 } else if (strcmp(token, "journal_only") == 0) {
 714                         if (arg) {
 715                                 extended_usage++;
 716                                 continue;
 717                         }
 718                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 719                 } else if (strcmp(token, "discard") == 0) {
 720                         ctx->options |= E2F_OPT_DISCARD;
 721                         continue;
 722                 } else if (strcmp(token, "nodiscard") == 0) {
 723                         ctx->options &= ~E2F_OPT_DISCARD;
 724                         continue;
 725                 } else if (strcmp(token, "optimize_extents") == 0) {
 726                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 727                         continue;
 728                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 729                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 730                         continue;
 731                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 732                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 733                         continue;
 734                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 735                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 736                         continue;
 737                 } else if (strcmp(token, "log_filename") == 0) {
 738                         if (!arg)
 739                                 extended_usage++;
 740                         else
 741                                 ctx->log_fn = string_copy(ctx, arg, 0);
 742                         continue;
 743                 } else if (strcmp(token, "problem_log") == 0) {
 744                         if (!arg)
 745                                 extended_usage++;
 746                         else
 747                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 748                         continue;
 749                 } else if (strcmp(token, "bmap2extent") == 0) {
 750                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 751                         continue;
 752                 } else if (strcmp(token, "fixes_only") == 0) {
 753                         ctx->options |= E2F_OPT_FIXES_ONLY;
 754                         continue;
 755                 } else if (strcmp(token, "unshare_blocks") == 0) {
 756                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 757                         ctx->options |= E2F_OPT_FORCE;
 758                         continue;
 759                 } else if (strcmp(token, "check_encoding") == 0) {
 760                         ctx->options |= E2F_OPT_CHECK_ENCODING;
 761                         continue;
 762 #ifdef CONFIG_DEVELOPER_FEATURES
 763                 } else if (strcmp(token, "clear_all_uninit_bits") == 0) {
 764                         ctx->options |= E2F_OPT_CLEAR_UNINIT;
 765                         continue;
 766 #endif
 767                 } else {
 768                         fprintf(stderr, _("Unknown extended option: %s\n"),
 769                                 token);
 770                         extended_usage++;
 771                 }
 772         }
 773         free(buf);
 774
 775         if (extended_usage) {
 776                 fputs(_("\nExtended options are separated by commas, "
 777                        "and may take an argument which\n"
 778                        "is set off by an equals ('=') sign.  "
 779                        "Valid extended options are:\n\n"), stderr);
 780                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 781                 fputs("\tfragcheck\n", stderr);
 782                 fputs("\tjournal_only\n", stderr);
 783                 fputs("\tdiscard\n", stderr);
 784                 fputs("\tnodiscard\n", stderr);
 785                 fputs("\toptimize_extents\n", stderr);
 786                 fputs("\tno_optimize_extents\n", stderr);
 787                 fputs("\tinode_count_fullmap\n", stderr);
 788                 fputs("\tno_inode_count_fullmap\n", stderr);
 789                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 790                 fputs("\tbmap2extent\n", stderr);
 791                 fputs("\tunshare_blocks\n", stderr);
 792                 fputs("\tfixes_only\n", stderr);
 793                 fputs("\tcheck_encoding\n", stderr);
 794                 fputc('\n', stderr);
 795                 exit(1);
 796         }
 797 }
 798
 799 static void syntax_err_report(const char *filename, long err, int line_num)
 800 {
 801         fprintf(stderr,
 802                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 803                 filename, line_num, error_message(err));
 804         exit(FSCK_ERROR);
 805 }
 806
 807 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 808
 809 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 810 {
 811         int             flush = 0;
 812         int             c, fd;
 813 #ifdef MTRACE
 814         extern void     *mallwatch;
 815 #endif
 816         e2fsck_t        ctx;
 817         errcode_t       retval;
 818 #ifdef HAVE_SIGNAL_H
 819         struct sigaction        sa;
 820 #endif
 821         char            *extended_opts = 0;
 822         char            *cp;
 823         int             res;            /* result of sscanf */
 824 #ifdef CONFIG_JBD_DEBUG
 825         char            *jbd_debug;
 826 #endif
 827         unsigned long long phys_mem_kb, blk;
 828
 829         retval = e2fsck_allocate_context(&ctx);
 830         if (retval)
 831                 return retval;
 832
 833         *ret_ctx = ctx;
 834         e2fsck_global_ctx = ctx;
 835
 836         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 837         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 838         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 839                 ctx->interactive = 1;
 840         } else {
 841                 ctx->start_meta[0] = '\001';
 842                 ctx->stop_meta[0] = '\002';
 843         }
 844         memset(bar, '=', sizeof(bar)-1);
 845         memset(spaces, ' ', sizeof(spaces)-1);
 846         add_error_table(&et_ext2_error_table);
 847         add_error_table(&et_prof_error_table);
 848         blkid_get_cache(&ctx->blkid, NULL);
 849
 850         if (argc && *argv)
 851                 ctx->program_name = *argv;
 852         else
 853                 ctx->program_name = "e2fsck";
 854
 855         phys_mem_kb = get_memory_size() / 1024;
 856         ctx->readahead_kb = ~0ULL;
 857
 858         while ((c = getopt(argc, argv, "pamnyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 859                 switch (c) {
 860                 case 'C':
 861                         ctx->progress = e2fsck_update_progress;
 862                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 863                         if (res != 1)
 864                                 goto sscanf_err;
 865
 866                         if (ctx->progress_fd < 0) {
 867                                 ctx->progress = 0;
 868                                 ctx->progress_fd = ctx->progress_fd * -1;
 869                         }
 870                         if (!ctx->progress_fd)
 871                                 break;
 872                         /* Validate the file descriptor to avoid disasters */
 873                         fd = dup(ctx->progress_fd);
 874                         if (fd < 0) {
 875                                 fprintf(stderr,
 876                                 _("Error validating file descriptor %d: %s\n"),
 877                                         ctx->progress_fd,
 878                                         error_message(errno));
 879                                 fatal_error(ctx,
 880                         _("Invalid completion information file descriptor"));
 881                         } else
 882                                 close(fd);
 883                         break;
 884                 case 'D':
 885                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 886                         break;
 887                 case 'E':
 888                         extended_opts = optarg;
 889                         break;
 890                 case 'p':
 891                 case 'a':
 892                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 893                         conflict_opt:
 894                                 fatal_error(ctx,
 895         _("Only one of the options -p/-a, -n or -y may be specified."));
 896                         }
 897                         ctx->options |= E2F_OPT_PREEN;
 898                         break;
 899                 case 'm':
 900                         ctx->options |= E2F_OPT_MULTITHREAD;
 901                         break;
 902                 case 'n':
 903                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 904                                 goto conflict_opt;
 905                         ctx->options |= E2F_OPT_NO;
 906                         break;
 907                 case 'y':
 908                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 909                                 goto conflict_opt;
 910                         ctx->options |= E2F_OPT_YES;
 911                         break;
 912                 case 't':
 913 #ifdef RESOURCE_TRACK
 914                         if (ctx->options & E2F_OPT_TIME)
 915                                 ctx->options |= E2F_OPT_TIME2;
 916                         else
 917                                 ctx->options |= E2F_OPT_TIME;
 918 #else
 919                         fprintf(stderr, _("The -t option is not "
 920                                 "supported on this version of e2fsck.\n"));
 921 #endif
 922                         break;
 923                 case 'c':
 924                         if (cflag++)
 925                                 ctx->options |= E2F_OPT_WRITECHECK;
 926                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 927                         break;
 928                 case 'r':
 929                         /* What we do by default, anyway! */
 930                         break;
 931                 case 'b':
 932                         res = sscanf(optarg, "%llu", &blk);
 933                         ctx->use_superblock = blk;
 934                         if (res != 1)
 935                                 goto sscanf_err;
 936                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 937                         break;
 938                 case 'B':
 939                         ctx->blocksize = atoi(optarg);
 940                         break;
 941                 case 'I':
 942                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 943                         if (res != 1)
 944                                 goto sscanf_err;
 945                         break;
 946                 case 'j':
 947                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 948                                                               optarg, NULL);
 949                         if (!ctx->journal_name) {
 950                                 com_err(ctx->program_name, 0,
 951                                         _("Unable to resolve '%s'"),
 952                                         optarg);
 953                                 fatal_error(ctx, 0);
 954                         }
 955                         break;
 956                 case 'P':
 957                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 958                         if (res != 1)
 959                                 goto sscanf_err;
 960                         break;
 961                 case 'L':
 962                         replace_bad_blocks++;
 963                         /* fall through */
 964                 case 'l':
 965                         if (bad_blocks_file)
 966                                 free(bad_blocks_file);
 967                         bad_blocks_file = string_copy(ctx, optarg, 0);
 968                         break;
 969                 case 'd':
 970                         ctx->options |= E2F_OPT_DEBUG;
 971                         break;
 972                 case 'f':
 973                         ctx->options |= E2F_OPT_FORCE;
 974                         break;
 975                 case 'F':
 976                         flush = 1;
 977                         break;
 978                 case 'v':
 979                         verbose = 1;
 980                         break;
 981                 case 'V':
 982                         show_version_only = 1;
 983                         break;
 984 #ifdef MTRACE
 985                 case 'M':
 986                         mallwatch = (void *) strtol(optarg, NULL, 0);
 987                         break;
 988 #endif
 989                 case 'N':
 990                         ctx->device_name = string_copy(ctx, optarg, 0);
 991                         break;
 992                 case 'k':
 993                         keep_bad_blocks++;
 994                         break;
 995                 case 'z':
 996                         ctx->undo_file = optarg;
 997                         break;
 998                 default:
 999                         usage(ctx);
1000                 }
1001         if (show_version_only)
1002                 return 0;
1003         if (optind != argc - 1)
1004                 usage(ctx);
1005         if ((ctx->options & E2F_OPT_NO) &&
1006             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1007                 com_err(ctx->program_name, 0, "%s",
1008                         _("The -n and -D options are incompatible."));
1009                 fatal_error(ctx, 0);
1010         }
1011         if ((ctx->options & E2F_OPT_NO) && cflag) {
1012                 com_err(ctx->program_name, 0, "%s",
1013                         _("The -n and -c options are incompatible."));
1014                 fatal_error(ctx, 0);
1015         }
1016         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1017                 com_err(ctx->program_name, 0, "%s",
1018                         _("The -n and -l/-L options are incompatible."));
1019                 fatal_error(ctx, 0);
1020         }
1021         if (ctx->options & E2F_OPT_MULTITHREAD) {
1022                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1023                         com_err(ctx->program_name, 0, "%s",
1024                                 _("The -m option should be used together with one of -p/-y/-n options."));
1025                         fatal_error(ctx, 0);
1026                 }
1027                 if (ctx->progress) {
1028                         com_err(ctx->program_name, 0, "%s",
1029                                 _("Only one of the options -C or -m may be specified."));
1030                         fatal_error(ctx, 0);
1031                 }
1032         }
1033         if (ctx->options & E2F_OPT_NO)
1034                 ctx->options |= E2F_OPT_READONLY;
1035
1036         ctx->io_options = strchr(argv[optind], '?');
1037         if (ctx->io_options)
1038                 *ctx->io_options++ = 0;
1039         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
1040         if (!ctx->filesystem_name) {
1041                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1042                         argv[optind]);
1043                 fatal_error(ctx, 0);
1044         }
1045         if (extended_opts)
1046                 parse_extended_opts(ctx, extended_opts);
1047
1048         /* Complain about mutually exclusive rebuilding activities */
1049         if (getenv("E2FSCK_FIXES_ONLY"))
1050                 ctx->options |= E2F_OPT_FIXES_ONLY;
1051         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1052             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1053                 com_err(ctx->program_name, 0, "%s",
1054                         _("The -D and -E fixes_only options are incompatible."));
1055                 fatal_error(ctx, 0);
1056         }
1057         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1058             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1059                 com_err(ctx->program_name, 0, "%s",
1060                         _("The -E bmap2extent and fixes_only options are incompatible."));
1061                 fatal_error(ctx, 0);
1062         }
1063
1064         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
1065                 config_fn[0] = cp;
1066         profile_set_syntax_err_cb(syntax_err_report);
1067         profile_init(config_fn, &ctx->profile);
1068
1069         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1070                             &c);
1071         if (c)
1072                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1073         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1074                             &c);
1075         if (c)
1076                 verbose = 1;
1077
1078         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1079                             0, 0, &c);
1080         if (c)
1081                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1082
1083         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1084                             0, 0, &c);
1085         if (c)
1086                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1087
1088         if (ctx->readahead_kb == ~0ULL) {
1089                 profile_get_integer(ctx->profile, "options",
1090                                     "readahead_mem_pct", 0, -1, &c);
1091                 if (c >= 0 && c <= 100)
1092                         ctx->readahead_kb = phys_mem_kb * c / 100;
1093                 profile_get_integer(ctx->profile, "options",
1094                                     "readahead_kb", 0, -1, &c);
1095                 if (c >= 0)
1096                         ctx->readahead_kb = c;
1097                 if (ctx->readahead_kb != ~0ULL &&
1098                     ctx->readahead_kb > phys_mem_kb)
1099                         ctx->readahead_kb = phys_mem_kb;
1100         }
1101
1102         /* Turn off discard in read-only mode */
1103         if ((ctx->options & E2F_OPT_NO) &&
1104             (ctx->options & E2F_OPT_DISCARD))
1105                 ctx->options &= ~E2F_OPT_DISCARD;
1106
1107         if (flush) {
1108                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1109                 if (fd < 0) {
1110                         com_err("open", errno,
1111                                 _("while opening %s for flushing"),
1112                                 ctx->filesystem_name);
1113                         fatal_error(ctx, 0);
1114                 }
1115                 if ((retval = ext2fs_sync_device(fd, 1))) {
1116                         com_err("ext2fs_sync_device", retval,
1117                                 _("while trying to flush %s"),
1118                                 ctx->filesystem_name);
1119                         fatal_error(ctx, 0);
1120                 }
1121                 close(fd);
1122         }
1123         if (cflag && bad_blocks_file) {
1124                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1125                                         "be both used at the same time.\n"));
1126                 exit(FSCK_USAGE);
1127         }
1128 #ifdef HAVE_SIGNAL_H
1129         /*
1130          * Set up signal action
1131          */
1132         memset(&sa, 0, sizeof(struct sigaction));
1133         sa.sa_handler = signal_cancel;
1134         sigaction(SIGINT, &sa, 0);
1135         sigaction(SIGTERM, &sa, 0);
1136 #ifdef SA_RESTART
1137         sa.sa_flags = SA_RESTART;
1138 #endif
1139         if ((ctx->options & E2F_OPT_MULTITHREAD) == 0) {
1140                 sa.sa_handler = signal_progress_on;
1141                 sigaction(SIGUSR1, &sa, 0);
1142                 sa.sa_handler = signal_progress_off;
1143                 sigaction(SIGUSR2, &sa, 0);
1144         }
1145 #endif
1146
1147         /* Update our PATH to include /sbin if we need to run badblocks  */
1148         if (cflag) {
1149                 char *oldpath = getenv("PATH");
1150                 char *newpath;
1151                 int len = sizeof(PATH_SET) + 1;
1152
1153                 if (oldpath)
1154                         len += strlen(oldpath);
1155
1156                 newpath = malloc(len);
1157                 if (!newpath)
1158                         fatal_error(ctx, "Couldn't malloc() newpath");
1159                 strcpy(newpath, PATH_SET);
1160
1161                 if (oldpath) {
1162                         strcat(newpath, ":");
1163                         strcat(newpath, oldpath);
1164                 }
1165                 putenv(newpath);
1166         }
1167 #ifdef CONFIG_JBD_DEBUG
1168         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1169         if (jbd_debug) {
1170                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1171                 if (res != 1) {
1172                         fprintf(stderr,
1173                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1174                                 jbd_debug);
1175                         exit (1);
1176                 }
1177         }
1178 #endif
1179         return 0;
1180
1181 sscanf_err:
1182         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1183                 c, optarg);
1184         exit (1);
1185 }
1186
1187 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1188                              ext2_filsys *ret_fs)
1189 {
1190         errcode_t retval;
1191
1192         *ret_fs = NULL;
1193         if (ctx->superblock && ctx->blocksize) {
1194                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1195                                       flags, ctx->superblock, ctx->blocksize,
1196                                       io_ptr, ret_fs);
1197         } else if (ctx->superblock) {
1198                 int blocksize;
1199                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1200                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1201                         if (*ret_fs) {
1202                                 ext2fs_free(*ret_fs);
1203                                 *ret_fs = NULL;
1204                         }
1205                         retval = ext2fs_open2(ctx->filesystem_name,
1206                                               ctx->io_options, flags,
1207                                               ctx->superblock, blocksize,
1208                                               io_ptr, ret_fs);
1209                         if (!retval)
1210                                 break;
1211                 }
1212         } else
1213                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1214                                       flags, 0, 0, io_ptr, ret_fs);
1215
1216         if (retval == 0) {
1217                 (*ret_fs)->priv_data = ctx;
1218                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1219                                        "default", NULL);
1220         }
1221         return retval;
1222 }
1223
1224 static const char *my_ver_string = E2FSPROGS_VERSION;
1225 static const char *my_ver_date = E2FSPROGS_DATE;
1226
1227 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1228 {
1229         struct mmp_struct *mmp_s;
1230         unsigned int mmp_check_interval;
1231         errcode_t retval = 0;
1232         struct problem_context pctx;
1233         unsigned int wait_time = 0;
1234
1235         clear_problem_context(&pctx);
1236         if (fs->mmp_buf == NULL) {
1237                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1238                 if (retval)
1239                         goto check_error;
1240         }
1241
1242         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1243         if (retval)
1244                 goto check_error;
1245
1246         mmp_s = fs->mmp_buf;
1247
1248         mmp_check_interval = fs->super->s_mmp_update_interval;
1249         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1250                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1251
1252         /*
1253          * If check_interval in MMP block is larger, use that instead of
1254          * check_interval from the superblock.
1255          */
1256         if (mmp_s->mmp_check_interval > mmp_check_interval)
1257                 mmp_check_interval = mmp_s->mmp_check_interval;
1258
1259         wait_time = mmp_check_interval * 2 + 1;
1260
1261         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1262                 retval = 0;
1263         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1264                 retval = EXT2_ET_MMP_FSCK_ON;
1265         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1266                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1267
1268         if (retval)
1269                 goto check_error;
1270
1271         /* Print warning if e2fsck will wait for more than 20 secs. */
1272         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1273                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1274                                "time is %u seconds. Please wait...\n"),
1275                         mmp_check_interval, wait_time * 2);
1276         }
1277
1278         return 0;
1279
1280 check_error:
1281
1282         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1283                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1284                         fs->super->s_mmp_block = 0;
1285                         ext2fs_mark_super_dirty(fs);
1286                         retval = 0;
1287                 }
1288         } else if (retval == EXT2_ET_MMP_FAILED) {
1289                 com_err(ctx->program_name, retval, "%s",
1290                         _("while checking MMP block"));
1291                 dump_mmp_msg(fs->mmp_buf, NULL);
1292         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1293                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1294                 com_err(ctx->program_name, retval, "%s",
1295                         _("while checking MMP block"));
1296                 dump_mmp_msg(fs->mmp_buf,
1297                              _("If you are sure the filesystem is not "
1298                                "in use on any node, run:\n"
1299                                "'tune2fs -f -E clear_mmp %s'\n"),
1300                              ctx->device_name);
1301         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1302                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1303                         ext2fs_mmp_clear(fs);
1304                         retval = 0;
1305                 }
1306         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1307                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1308                         ext2fs_mmp_clear(fs);
1309                         retval = 0;
1310                 }
1311         } else
1312                 com_err(ctx->program_name, retval, "%s",
1313                         _("while reading MMP block"));
1314         return retval;
1315 }
1316
1317 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1318 {
1319         errcode_t retval = ENOMEM;
1320         char *tdb_dir = NULL, *tdb_file = NULL;
1321         char *dev_name, *tmp_name;
1322         int free_tdb_dir = 0;
1323
1324         /* (re)open a specific undo file */
1325         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1326                 retval = set_undo_io_backing_manager(*io_ptr);
1327                 if (retval)
1328                         goto err;
1329                 *io_ptr = undo_io_manager;
1330                 retval = set_undo_io_backup_file(ctx->undo_file);
1331                 if (retval)
1332                         goto err;
1333                 printf(_("Overwriting existing filesystem; this can be undone "
1334                          "using the command:\n"
1335                          "    e2undo %s %s\n\n"),
1336                         ctx->undo_file, ctx->filesystem_name);
1337                 return retval;
1338         }
1339
1340         /*
1341          * Configuration via a conf file would be
1342          * nice
1343          */
1344         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1345         if (!tdb_dir) {
1346                 profile_get_string(ctx->profile, "defaults",
1347                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1348                                    &tdb_dir);
1349                 free_tdb_dir = 1;
1350         }
1351
1352         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1353             access(tdb_dir, W_OK)) {
1354                 if (free_tdb_dir)
1355                         free(tdb_dir);
1356                 return 0;
1357         }
1358
1359         tmp_name = strdup(ctx->filesystem_name);
1360         if (!tmp_name)
1361                 goto errout;
1362         dev_name = basename(tmp_name);
1363         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1364         if (!tdb_file) {
1365                 free(tmp_name);
1366                 goto errout;
1367         }
1368         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1369         free(tmp_name);
1370
1371         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1372                 retval = errno;
1373                 com_err(ctx->program_name, retval,
1374                         _("while trying to delete %s"), tdb_file);
1375                 goto errout;
1376         }
1377
1378         retval = set_undo_io_backing_manager(*io_ptr);
1379         if (retval)
1380                 goto errout;
1381         *io_ptr = undo_io_manager;
1382         retval = set_undo_io_backup_file(tdb_file);
1383         if (retval)
1384                 goto errout;
1385         printf(_("Overwriting existing filesystem; this can be undone "
1386                  "using the command:\n"
1387                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1388
1389         if (free_tdb_dir)
1390                 free(tdb_dir);
1391         free(tdb_file);
1392         return 0;
1393
1394 errout:
1395         if (free_tdb_dir)
1396                 free(tdb_dir);
1397         free(tdb_file);
1398 err:
1399         com_err(ctx->program_name, retval, "%s",
1400                 _("while trying to setup undo file\n"));
1401         return retval;
1402 }
1403
1404 int main (int argc, char *argv[])
1405 {
1406         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1407         int             exit_value = FSCK_OK;
1408         ext2_filsys     fs = 0;
1409         io_manager      io_ptr;
1410         struct ext2_super_block *sb;
1411         const char      *lib_ver_date;
1412         int             my_ver, lib_ver;
1413         e2fsck_t        ctx;
1414         blk64_t         orig_superblock = ~(blk64_t)0;
1415         struct problem_context pctx;
1416         int flags, run_result, was_changed;
1417         int journal_size;
1418         int sysval, sys_page_size = 4096;
1419         int old_bitmaps;
1420         __u32 features[3];
1421         char *cp;
1422         enum quota_type qtype;
1423         struct ext2fs_journal_params jparams;
1424
1425         clear_problem_context(&pctx);
1426         sigcatcher_setup();
1427 #ifdef MTRACE
1428         mtrace();
1429 #endif
1430 #ifdef MCHECK
1431         mcheck(0);
1432 #endif
1433 #ifdef ENABLE_NLS
1434         setlocale(LC_MESSAGES, "");
1435         setlocale(LC_CTYPE, "");
1436         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1437         textdomain(NLS_CAT_NAME);
1438         set_com_err_gettext(gettext);
1439 #endif
1440         my_ver = ext2fs_parse_version_string(my_ver_string);
1441         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1442         if (my_ver > lib_ver) {
1443                 fprintf( stderr, "%s",
1444                          _("Error: ext2fs library version out of date!\n"));
1445                 show_version_only++;
1446         }
1447
1448         retval = PRS(argc, argv, &ctx);
1449         if (retval) {
1450                 com_err("e2fsck", retval, "%s",
1451                         _("while trying to initialize program"));
1452                 exit(FSCK_ERROR);
1453         }
1454         reserve_stdio_fds();
1455
1456         ctx->global_ctx = NULL;
1457         set_up_logging(ctx);
1458         if (ctx->logf) {
1459                 int i;
1460
1461                 fputs("E2fsck run: ", ctx->logf);
1462                 for (i = 0; i < argc; i++) {
1463                         if (i)
1464                                 fputc(' ', ctx->logf);
1465                         fputs(argv[i], ctx->logf);
1466                 }
1467                 fputc('\n', ctx->logf);
1468         }
1469         if (ctx->problem_logf) {
1470                 int i;
1471
1472                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1473                       ctx->problem_logf);
1474                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1475                         (unsigned long) ctx->now);
1476                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1477                         argv[0]);
1478                 for (i = 1; i < argc; i++)
1479                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1480                 fputs("/>\n", ctx->problem_logf);
1481         }
1482
1483         init_resource_track(&ctx->global_rtrack, NULL);
1484         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1485                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1486                          my_ver_date);
1487
1488         if (show_version_only) {
1489                 log_err(ctx, _("\tUsing %s, %s\n"),
1490                         error_message(EXT2_ET_BASE), lib_ver_date);
1491                 exit(FSCK_OK);
1492         }
1493
1494         check_mount(ctx);
1495
1496         if (!(ctx->options & E2F_OPT_PREEN) &&
1497             !(ctx->options & E2F_OPT_NO) &&
1498             !(ctx->options & E2F_OPT_YES)) {
1499                 if (!ctx->interactive)
1500                         fatal_error(ctx,
1501                                     _("need terminal for interactive repairs"));
1502         }
1503         ctx->superblock = ctx->use_superblock;
1504
1505         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1506 restart:
1507 #ifdef CONFIG_TESTIO_DEBUG
1508         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1509                 io_ptr = test_io_manager;
1510                 test_io_backing_manager = unix_io_manager;
1511         } else
1512 #endif
1513                 io_ptr = unix_io_manager;
1514         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1515         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1516                             &old_bitmaps);
1517         if (!old_bitmaps)
1518                 flags |= EXT2_FLAG_64BITS;
1519         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1520                 flags |= EXT2_FLAG_RW;
1521                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1522                       ctx->mount_flags & EXT2_MF_READONLY))
1523                         flags |= EXT2_FLAG_EXCLUSIVE;
1524                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1525                     (ctx->options & E2F_OPT_FORCE))
1526                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1527         }
1528
1529         if (ctx->undo_file) {
1530                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1531                 if (retval)
1532                         exit(FSCK_ERROR);
1533         }
1534
1535         ctx->openfs_flags = flags;
1536         ctx->io_manager = io_ptr;
1537         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1538
1539         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1540             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1541             ((retval == EXT2_ET_BAD_MAGIC) ||
1542              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1543              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1544              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1545                 if (retval) {
1546                         pctx.errcode = retval;
1547                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1548                 }
1549                 if (retval2) {
1550                         pctx.errcode = retval2;
1551                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1552                 }
1553                 pctx.errcode = 0;
1554                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1555                         retval = retval2;
1556                         goto failure;
1557                 }
1558                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1559                         ext2fs_free(fs);
1560                         fs = NULL;
1561                 }
1562                 if (!fs || (fs->group_desc_count > 1)) {
1563                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1564                                 ctx->program_name,
1565                                 retval ? _("Superblock invalid,") :
1566                                 _("Group descriptors look bad..."));
1567                         orig_superblock = ctx->superblock;
1568                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1569                         if (fs)
1570                                 ext2fs_close_free(&fs);
1571                         orig_retval = retval;
1572                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1573                         if ((orig_retval == 0) && retval != 0) {
1574                                 if (fs)
1575                                         ext2fs_close_free(&fs);
1576                                 log_out(ctx, _("%s: %s while using the "
1577                                                "backup blocks"),
1578                                         ctx->program_name,
1579                                         error_message(retval));
1580                                 log_out(ctx, _("%s: going back to original "
1581                                                "superblock\n"),
1582                                         ctx->program_name);
1583                                 ctx->superblock = orig_superblock;
1584                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1585                         }
1586                 }
1587         }
1588         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1589              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1590             fs && fs->super) {
1591                 sb = fs->super;
1592                 features[0] = (sb->s_feature_compat &
1593                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1594                 features[1] = (sb->s_feature_incompat &
1595                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1596                 features[2] = (sb->s_feature_ro_compat &
1597                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1598                 if (features[0] || features[1] || features[2])
1599                         goto print_unsupp_features;
1600         }
1601 failure:
1602         if (retval) {
1603                 if (orig_retval)
1604                         retval = orig_retval;
1605                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1606                         ctx->filesystem_name);
1607                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1608                         log_out(ctx, "%s",
1609                                 _("The filesystem revision is apparently "
1610                                   "too high for this version of e2fsck.\n"
1611                                   "(Or the filesystem superblock "
1612                                   "is corrupt)\n\n"));
1613                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1614                 } else if (retval == EXT2_ET_SHORT_READ)
1615                         log_out(ctx, "%s",
1616                                 _("Could this be a zero-length partition?\n"));
1617                 else if ((retval == EPERM) || (retval == EACCES))
1618                         log_out(ctx, _("You must have %s access to the "
1619                                        "filesystem or be root\n"),
1620                                (ctx->options & E2F_OPT_READONLY) ?
1621                                "r/o" : "r/w");
1622                 else if (retval == ENXIO)
1623                         log_out(ctx, "%s",
1624                                 _("Possibly non-existent or swap device?\n"));
1625                 else if (retval == EBUSY)
1626                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1627                                          "exclusively by another program?\n"));
1628                 else if (retval == ENOENT)
1629                         log_out(ctx, "%s",
1630                                 _("Possibly non-existent device?\n"));
1631 #ifdef EROFS
1632                 else if (retval == EROFS)
1633                         log_out(ctx, "%s", _("Disk write-protected; use the "
1634                                              "-n option to do a read-only\n"
1635                                              "check of the device.\n"));
1636 #endif
1637                 else {
1638                         /*
1639                          * Let's try once more will less consistency checking
1640                          * so that we are able to recover from more errors
1641                          * (e.g. some tool messing up some value in the sb).
1642                          */
1643                         if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) &&
1644                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1645                                 if (fs)
1646                                         ext2fs_close_free(&fs);
1647                                 log_out(ctx, _("%s: Trying to load superblock "
1648                                         "despite errors...\n"),
1649                                         ctx->program_name);
1650                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1651                                 /*
1652                                  * If we tried backup sb, revert to the
1653                                  * original one now.
1654                                  */
1655                                 if (orig_superblock != ~(blk64_t)0)
1656                                         ctx->superblock = orig_superblock;
1657                                 goto restart;
1658                         }
1659                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1660                         if (retval == EXT2_ET_BAD_MAGIC)
1661                                 check_plausibility(ctx->filesystem_name,
1662                                                    CHECK_FS_EXIST, NULL);
1663                 }
1664                 fatal_error(ctx, 0);
1665         }
1666         /*
1667          * We only update the master superblock because (a) paranoia;
1668          * we don't want to corrupt the backup superblocks, and (b) we
1669          * don't need to update the mount count and last checked
1670          * fields in the backup superblock (the kernel doesn't update
1671          * the backup superblocks anyway).  With newer versions of the
1672          * library this flag is set by ext2fs_open2(), but we set this
1673          * here just to be sure.  (No, we don't support e2fsck running
1674          * with some other libext2fs than the one that it was shipped
1675          * with, but just in case....)
1676          */
1677         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1678
1679         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1680                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1681                 int need_restart = 0;
1682
1683                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1684                                                        blocksize,
1685                                                        &ctx->num_blocks);
1686                 /*
1687                  * The floppy driver refuses to allow anyone else to
1688                  * open the device if has been opened with O_EXCL;
1689                  * this is unlike other block device drivers in Linux.
1690                  * To handle this, we close the filesystem and then
1691                  * reopen the filesystem after we get the device size.
1692                  */
1693                 if (pctx.errcode == EBUSY) {
1694                         ext2fs_close_free(&fs);
1695                         need_restart++;
1696                         pctx.errcode =
1697                                 ext2fs_get_device_size2(ctx->filesystem_name,
1698                                                         blocksize,
1699                                                         &ctx->num_blocks);
1700                 }
1701                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1702                         ctx->num_blocks = 0;
1703                 else if (pctx.errcode) {
1704                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1705                         ctx->flags |= E2F_FLAG_ABORT;
1706                         fatal_error(ctx, 0);
1707                 }
1708                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1709                 if (need_restart)
1710                         goto restart;
1711         }
1712
1713         ctx->fs = fs;
1714         fs->now = ctx->now;
1715         sb = fs->super;
1716
1717         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1718                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1719                         _("while trying to open %s"),
1720                         ctx->filesystem_name);
1721         get_newer:
1722                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1723         }
1724
1725         /*
1726          * Set the device name, which is used whenever we print error
1727          * or informational messages to the user.
1728          */
1729         if (ctx->device_name == 0 && sb->s_volume_name[0])
1730                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1731                                                sizeof(sb->s_volume_name));
1732
1733         if (ctx->device_name == 0)
1734                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1735         for (cp = ctx->device_name; *cp; cp++)
1736                 if (isspace(*cp) || *cp == ':')
1737                         *cp = '_';
1738
1739         if (ctx->problem_logf) {
1740
1741                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1742                         ctx->filesystem_name);
1743                 if (!uuid_is_null(sb->s_uuid)) {
1744                         char buf[48];
1745
1746                         uuid_unparse(sb->s_uuid, buf);
1747                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1748                 }
1749                 if (sb->s_volume_name[0])
1750                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1751                                 EXT2_LEN_STR(sb->s_volume_name));
1752
1753                 fputs("/>\n", ctx->problem_logf);
1754         }
1755
1756         ehandler_init(fs->io);
1757
1758         if (ext2fs_has_feature_mmp(fs->super) &&
1759             (flags & EXT2_FLAG_SKIP_MMP)) {
1760                 if (e2fsck_check_mmp(fs, ctx))
1761                         fatal_error(ctx, 0);
1762
1763                 /*
1764                  * Restart in order to reopen fs but this time start mmp.
1765                  */
1766                 ext2fs_close_free(&ctx->fs);
1767                 flags &= ~EXT2_FLAG_SKIP_MMP;
1768                 goto restart;
1769         }
1770
1771         if (ctx->logf)
1772                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1773                         e2p_uuid2str(sb->s_uuid));
1774
1775         /*
1776          * Make sure the ext3 superblock fields are consistent.
1777          */
1778         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1779                 retval = e2fsck_check_ext3_journal(ctx);
1780                 if (retval) {
1781                         com_err(ctx->program_name, retval,
1782                                 _("while checking journal for %s"),
1783                                 ctx->device_name);
1784                         fatal_error(ctx,
1785                                 _("Cannot proceed with file system check"));
1786                 }
1787         }
1788
1789         /*
1790          * Check to see if we need to do ext3-style recovery.  If so,
1791          * do it, and then restart the fsck.
1792          */
1793         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1794                 if (ctx->options & E2F_OPT_READONLY) {
1795                         log_out(ctx, "%s",
1796                                 _("Warning: skipping journal recovery because "
1797                                   "doing a read-only filesystem check.\n"));
1798                         io_channel_flush(ctx->fs->io);
1799                 } else {
1800                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1801                                 /*
1802                                  * Whoops, we attempted to run the
1803                                  * journal twice.  This should never
1804                                  * happen, unless the hardware or
1805                                  * device driver is being bogus.
1806                                  */
1807                                 com_err(ctx->program_name, 0,
1808                                         _("unable to set superblock flags "
1809                                           "on %s\n"), ctx->device_name);
1810                                 fatal_error(ctx, 0);
1811                         }
1812                         retval = e2fsck_run_ext3_journal(ctx);
1813                         if (retval == EFSBADCRC) {
1814                                 log_out(ctx, _("Journal checksum error "
1815                                                "found in %s\n"),
1816                                         ctx->device_name);
1817                         } else if (retval == EFSCORRUPTED) {
1818                                 log_out(ctx, _("Journal corrupted in %s\n"),
1819                                         ctx->device_name);
1820                         } else if (retval) {
1821                                 com_err(ctx->program_name, retval,
1822                                 _("while recovering journal of %s"),
1823                                         ctx->device_name);
1824                         }
1825                         ext2fs_close_free(&ctx->fs);
1826                         ctx->flags |= E2F_FLAG_RESTARTED;
1827                         goto restart;
1828                 }
1829         }
1830
1831         /*
1832          * Check for compatibility with the feature sets.  We need to
1833          * be more stringent than ext2fs_open().
1834          */
1835         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1836         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1837         features[2] = (sb->s_feature_ro_compat &
1838                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1839 print_unsupp_features:
1840         if (features[0] || features[1] || features[2]) {
1841                 int     i, j;
1842                 __u32   *mask = features, m;
1843
1844                 log_err(ctx, _("%s has unsupported feature(s):"),
1845                         ctx->filesystem_name);
1846
1847                 for (i=0; i <3; i++,mask++) {
1848                         for (j=0,m=1; j < 32; j++, m<<=1) {
1849                                 if (*mask & m)
1850                                         log_err(ctx, " %s",
1851                                                 e2p_feature2string(i, m));
1852                         }
1853                 }
1854                 log_err(ctx, "\n");
1855                 goto get_newer;
1856         }
1857
1858         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1859                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1860                         ctx->filesystem_name, sb->s_encoding);
1861                 goto get_newer;
1862         }
1863
1864         /*
1865          * If the user specified a specific superblock, presumably the
1866          * master superblock has been trashed.  So we mark the
1867          * superblock as dirty, so it can be written out.
1868          */
1869         if (ctx->superblock &&
1870             !(ctx->options & E2F_OPT_READONLY))
1871                 ext2fs_mark_super_dirty(fs);
1872
1873         /*
1874          * Calculate the number of filesystem blocks per pagesize.  If
1875          * fs->blocksize > page_size, set the number of blocks per
1876          * pagesize to 1 to avoid division by zero errors.
1877          */
1878 #ifdef _SC_PAGESIZE
1879         sysval = sysconf(_SC_PAGESIZE);
1880         if (sysval > 0)
1881                 sys_page_size = sysval;
1882 #endif /* _SC_PAGESIZE */
1883         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1884         if (ctx->blocks_per_page == 0)
1885                 ctx->blocks_per_page = 1;
1886
1887         if (ctx->superblock)
1888                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1889         ext2fs_mark_valid(fs);
1890         check_super_block(ctx);
1891         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1892                 fatal_error(ctx, 0);
1893         check_if_skip(ctx);
1894         check_resize_inode(ctx);
1895         if (bad_blocks_file)
1896                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1897         else if (cflag)
1898                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1899         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1900                 fatal_error(ctx, 0);
1901
1902         /*
1903          * Mark the system as valid, 'til proven otherwise
1904          */
1905         ext2fs_mark_valid(fs);
1906
1907         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1908         if (retval) {
1909                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1910                         ctx->program_name, error_message(retval));
1911                 preenhalt(ctx);
1912                 log_out(ctx, "%s", _("This doesn't bode well, "
1913                                      "but we'll try to go on...\n"));
1914         }
1915
1916         /*
1917          * Save the journal size in megabytes.
1918          * Try and use the journal size from the backup else let e2fsck
1919          * find the default journal size. If fast commit feature is enabled,
1920          * it is not clear how many of the journal blocks were fast commit
1921          * blocks. So, ignore the size of journal found in backup.
1922          *
1923          * TODO: Add a new backup type that captures fast commit info as
1924          * well.
1925          */
1926         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
1927                 !ext2fs_has_feature_fast_commit(sb))
1928                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1929                                (sb->s_jnl_blocks[16] >> 20);
1930         else
1931                 journal_size = -1;
1932
1933         if (ext2fs_has_feature_quota(sb)) {
1934                 /* Quotas were enabled. Do quota accounting during fsck. */
1935                 clear_problem_context(&pctx);
1936                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1937                 if (pctx.errcode) {
1938                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1939                         fatal_error(ctx, 0);
1940                 }
1941         }
1942
1943         run_result = e2fsck_run(ctx);
1944         e2fsck_clear_progbar(ctx);
1945
1946         if (!ctx->invalid_bitmaps &&
1947             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1948                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1949                         if (journal_size < 1024) {
1950                                 ext2fs_get_journal_params(&jparams, fs);
1951                         } else {
1952                                 jparams.num_journal_blocks = journal_size;
1953                                 jparams.num_fc_blocks = 0;
1954                         }
1955                         log_out(ctx, _("Creating journal (%d blocks): "),
1956                                jparams.num_journal_blocks);
1957                         fflush(stdout);
1958                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
1959                         if (retval) {
1960                                 log_out(ctx, "%s: while trying to create "
1961                                         "journal\n", error_message(retval));
1962                                 goto no_journal;
1963                         }
1964                         log_out(ctx, "%s", _(" Done.\n"));
1965                         log_out(ctx, "%s",
1966                                 _("\n*** journal has been regenerated ***\n"));
1967                 }
1968         }
1969 no_journal:
1970
1971         if (run_result & E2F_FLAG_ABORT) {
1972                 fatal_error(ctx, _("aborted"));
1973         } else if (run_result & E2F_FLAG_CANCEL) {
1974                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1975                         ctx->device_name : ctx->filesystem_name);
1976                 exit_value |= FSCK_CANCELED;
1977         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
1978                 int needs_writeout;
1979
1980                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1981                         if (*quota_sb_inump(sb, qtype) == 0)
1982                                 continue;
1983                         needs_writeout = 0;
1984                         pctx.num = qtype;
1985                         retval = quota_compare_and_update(ctx->qctx, qtype,
1986                                                           &needs_writeout);
1987                         if ((retval || needs_writeout) &&
1988                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
1989                                 pctx.errcode = quota_write_inode(ctx->qctx,
1990                                                                  1 << qtype);
1991                                 if (pctx.errcode)
1992                                         (void) fix_problem(ctx,
1993                                                 PR_6_WRITE_QUOTAS, &pctx);
1994                         }
1995                 }
1996                 quota_release_context(&ctx->qctx);
1997         }
1998
1999         if (run_result == E2F_FLAG_RESTART) {
2000                 log_out(ctx, "%s",
2001                         _("Restarting e2fsck from the beginning...\n"));
2002                 retval = e2fsck_reset_context(ctx);
2003                 if (retval) {
2004                         com_err(ctx->program_name, retval, "%s",
2005                                 _("while resetting context"));
2006                         fatal_error(ctx, 0);
2007                 }
2008                 ext2fs_close_free(&ctx->fs);
2009                 goto restart;
2010         }
2011
2012 #ifdef MTRACE
2013         mtrace_print("Cleanup");
2014 #endif
2015         was_changed = ext2fs_test_changed(fs);
2016         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2017             !(ctx->options & E2F_OPT_READONLY)) {
2018                 if (ext2fs_test_valid(fs)) {
2019                         if (!(sb->s_state & EXT2_VALID_FS))
2020                                 exit_value |= FSCK_NONDESTRUCT;
2021                         sb->s_state = EXT2_VALID_FS;
2022                         if (check_backup_super_block(ctx))
2023                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2024                 } else
2025                         sb->s_state &= ~EXT2_VALID_FS;
2026                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2027                         sb->s_lastcheck = ctx->now;
2028                 sb->s_mnt_count = 0;
2029                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2030                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2031                 if (pctx.errcode)
2032                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2033                 ext2fs_mark_super_dirty(fs);
2034         }
2035
2036         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2037             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2038             (ctx->options & E2F_OPT_NO))
2039                 /* Don't try to write or flush I/O, we just wanted to know whether or
2040                  * not there were enough free blocks to undo deduplication.
2041                  */
2042                 goto skip_write;
2043
2044         if (!(ctx->options & E2F_OPT_READONLY)) {
2045                 e2fsck_write_bitmaps(ctx);
2046                 if (fs->flags & EXT2_FLAG_DIRTY) {
2047                         pctx.errcode = ext2fs_flush(ctx->fs);
2048                         if (pctx.errcode)
2049                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2050                 }
2051                 pctx.errcode = io_channel_flush(ctx->fs->io);
2052                 if (pctx.errcode)
2053                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2054         }
2055
2056         if (was_changed) {
2057                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2058
2059                 if (fs_fixed)
2060                         exit_value |= FSCK_NONDESTRUCT;
2061                 if (!(ctx->options & E2F_OPT_PREEN)) {
2062 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2063                         log_out(ctx, fs_fixed ?
2064                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2065                                   "CORRECTED *****\n") :
2066                                 _("%s: File system was modified.\n"),
2067                                 ctx->device_name);
2068 #else
2069                         log_out(ctx,
2070                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2071                                 ctx->device_name);
2072 #endif
2073                 }
2074                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2075                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2076                                 ctx->device_name);
2077                         exit_value |= FSCK_REBOOT;
2078                 }
2079         }
2080
2081 skip_write:
2082         if (!ext2fs_test_valid(fs) ||
2083             ((exit_value & FSCK_CANCELED) &&
2084              (sb->s_state & EXT2_ERROR_FS))) {
2085                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2086                                "errors **********\n\n"), ctx->device_name);
2087                 exit_value |= FSCK_UNCORRECTED;
2088                 exit_value &= ~FSCK_NONDESTRUCT;
2089         }
2090         if (exit_value & FSCK_CANCELED) {
2091                 int     allow_cancellation;
2092
2093                 profile_get_boolean(ctx->profile, "options",
2094                                     "allow_cancellation", 0, 0,
2095                                     &allow_cancellation);
2096                 exit_value &= ~FSCK_NONDESTRUCT;
2097                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2098                     (sb->s_state & EXT2_VALID_FS) &&
2099                     !(sb->s_state & EXT2_ERROR_FS))
2100                         exit_value = 0;
2101         } else
2102                 show_stats(ctx);
2103
2104         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2105
2106         ext2fs_close_free(&ctx->fs);
2107         free(ctx->journal_name);
2108
2109         if (ctx->logf)
2110                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2111         e2fsck_free_context(ctx);
2112         remove_error_table(&et_ext2_error_table);
2113         remove_error_table(&et_prof_error_table);
2114         return exit_value;
2115 }