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 #ifdef CONFIG_PFSCK
  86                 " -m                   multiple threads to speedup fsck\n"
  87 #endif
  88                 " -n                   Make no changes to the filesystem\n"
  89                 " -y                   Assume \"yes\" to all questions\n"
  90                 " -c                   Check for bad blocks and add them to the badblock list\n"
  91                 " -f                   Force checking even if filesystem is marked clean\n"));
  92         fprintf(stderr, "%s", _(""
  93                 " -v                   Be verbose\n"
  94                 " -b superblock        Use alternative superblock\n"
  95                 " -B blocksize         Force blocksize when looking for superblock\n"
  96                 " -j external_journal  Set location of the external journal\n"
  97                 " -l bad_blocks_file   Add to badblocks list\n"
  98                 " -L bad_blocks_file   Set badblocks list\n"
  99                 " -z undo_file         Create an undo file\n"
 100                 ));
 101
 102         exit(FSCK_USAGE);
 103 }
 104
 105 static void show_stats(e2fsck_t ctx)
 106 {
 107         ext2_filsys fs = ctx->fs;
 108         ext2_ino_t inodes, inodes_used;
 109         blk64_t blocks, blocks_used;
 110         unsigned int dir_links;
 111         unsigned int num_files, num_links;
 112         __u32 *mask, m;
 113         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 114         int i, j, printed = 0;
 115
 116         dir_links = 2 * ctx->fs_directory_count - 1;
 117         num_files = ctx->fs_total_count - dir_links;
 118         num_links = ctx->fs_links_count - dir_links;
 119         inodes = fs->super->s_inodes_count;
 120         inodes_used = (fs->super->s_inodes_count -
 121                        fs->super->s_free_inodes_count);
 122         blocks = ext2fs_blocks_count(fs->super);
 123         blocks_used = (ext2fs_blocks_count(fs->super) -
 124                        ext2fs_free_blocks_count(fs->super));
 125
 126         if (inodes_used > 0) {
 127                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 128                 frag_percent_file = (frag_percent_file + 5) / 10;
 129
 130                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 131                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 132
 133                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 134                                                 ctx->fs_fragmented_dir))
 135                                       / inodes_used);
 136                 frag_percent_total = (frag_percent_total + 5) / 10;
 137         }
 138
 139         if (!verbose) {
 140                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 141                                "%llu/%llu blocks\n"),
 142                         ctx->device_name, inodes_used, inodes,
 143                         frag_percent_total / 10, frag_percent_total % 10,
 144                         blocks_used, blocks);
 145                 return;
 146         }
 147         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 148                             &i);
 149         if (verbose && i) {
 150                 log_out(ctx, "\nFilesystem features:");
 151                 mask = &ctx->fs->super->s_feature_compat;
 152                 for (i = 0; i < 3; i++, mask++) {
 153                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 154                                 if (*mask & m) {
 155                                         log_out(ctx, " %s",
 156                                                 e2p_feature2string(i, m));
 157                                         printed++;
 158                                 }
 159                         }
 160                 }
 161                 if (printed == 0)
 162                         log_out(ctx, " (none)");
 163                 log_out(ctx, "\n");
 164         }
 165
 166         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 167                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 168                         inodes_used), inodes_used,
 169                 100.0 * inodes_used / inodes, inodes);
 170         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 171                         "%12u non-contiguous files (%0d.%d%%)\n",
 172                         ctx->fs_fragmented),
 173                 ctx->fs_fragmented, frag_percent_file / 10,
 174                 frag_percent_file % 10);
 175         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 176                         "%12u non-contiguous directories (%0d.%d%%)\n",
 177                         ctx->fs_fragmented_dir),
 178                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 179                 frag_percent_dir % 10);
 180         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 181                        "%u/%u/%u\n"),
 182                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 183
 184         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 185                 if (ctx->extent_depth_count[j])
 186                         break;
 187         if (++j) {
 188                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 189                 for (i=0; i < j; i++) {
 190                         if (i)
 191                                 fputc('/', stdout);
 192                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 193                 }
 194                 log_out(ctx, "\n");
 195         }
 196
 197         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 198                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 199                    blocks_used),
 200                 blocks_used, 100.0 * blocks_used / blocks, 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                 ext2fs_blocks_count(fs->super) -
 451                 ext2fs_free_blocks_count(fs->super),
 452                 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 initialize_profile_options(e2fsck_t ctx)
 664 {
 665         char *tmp;
 666
 667         /* [options] shared=preserve|lost+found|delete */
 668         tmp = NULL;
 669         ctx->shared = E2F_SHARED_PRESERVE;
 670         profile_get_string(ctx->profile, "options", "shared", 0,
 671                            "preserve", &tmp);
 672         if (tmp) {
 673                 if (strcmp(tmp, "preserve") == 0)
 674                         ctx->shared = E2F_SHARED_PRESERVE;
 675                 else if (strcmp(tmp, "delete") == 0)
 676                         ctx->shared = E2F_SHARED_DELETE;
 677                 else if (strcmp(tmp, "lost+found") == 0)
 678                         ctx->shared = E2F_SHARED_LPF;
 679                 else {
 680                         com_err(ctx->program_name, 0,
 681                                 _("configuration error: 'shared=%s'"), tmp);
 682                         fatal_error(ctx, 0);
 683                 }
 684                 free(tmp);
 685         }
 686
 687         /* [options] clone=dup|zero */
 688         tmp = NULL;
 689         ctx->clone = E2F_CLONE_DUP;
 690         profile_get_string(ctx->profile, "options", "clone", 0,
 691                            "dup", &tmp);
 692         if (tmp) {
 693                 if (strcmp(tmp, "dup") == 0)
 694                         ctx->clone = E2F_CLONE_DUP;
 695                 else if (strcmp(tmp, "zero") == 0)
 696                         ctx->clone = E2F_CLONE_ZERO;
 697                 else {
 698                         com_err(ctx->program_name, 0,
 699                                 _("configuration error: 'clone=%s'"), tmp);
 700                         fatal_error(ctx, 0);
 701                 }
 702                 free(tmp);
 703         }
 704 }
 705
 706 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 707 {
 708         char    *buf, *token, *next, *p, *arg;
 709         int     ea_ver;
 710         int     extended_usage = 0;
 711         unsigned long long reada_kb;
 712
 713         buf = string_copy(ctx, opts, 0);
 714         for (token = buf; token && *token; token = next) {
 715                 p = strchr(token, ',');
 716                 next = 0;
 717                 if (p) {
 718                         *p = 0;
 719                         next = p+1;
 720                 }
 721                 arg = strchr(token, '=');
 722                 if (arg) {
 723                         *arg = 0;
 724                         arg++;
 725                 }
 726                 if (strcmp(token, "ea_ver") == 0) {
 727                         if (!arg) {
 728                                 extended_usage++;
 729                                 continue;
 730                         }
 731                         ea_ver = strtoul(arg, &p, 0);
 732                         if (*p ||
 733                             ((ea_ver != 1) && (ea_ver != 2))) {
 734                                 fprintf(stderr, "%s",
 735                                         _("Invalid EA version.\n"));
 736                                 extended_usage++;
 737                                 continue;
 738                         }
 739                         ctx->ext_attr_ver = ea_ver;
 740                 } else if (strcmp(token, "readahead_kb") == 0) {
 741                         if (!arg) {
 742                                 extended_usage++;
 743                                 continue;
 744                         }
 745                         reada_kb = strtoull(arg, &p, 0);
 746                         if (*p) {
 747                                 fprintf(stderr, "%s",
 748                                         _("Invalid readahead buffer size.\n"));
 749                                 extended_usage++;
 750                                 continue;
 751                         }
 752                         ctx->readahead_kb = reada_kb;
 753                 } else if (strcmp(token, "fragcheck") == 0) {
 754                         ctx->options |= E2F_OPT_FRAGCHECK;
 755                         continue;
 756                 /* -E shared=preserve|lost+found|delete */
 757                 } else if (strcmp(token, "shared") == 0) {
 758                         if (!arg) {
 759                                 extended_usage++;
 760                                 continue;
 761                         }
 762                         if (strcmp(arg, "preserve") == 0) {
 763                                 ctx->shared = E2F_SHARED_PRESERVE;
 764                         } else if (strcmp(arg, "lost+found") == 0) {
 765                                 ctx->shared = E2F_SHARED_LPF;
 766                         } else if (strcmp(arg, "delete") == 0) {
 767                                 ctx->shared = E2F_SHARED_DELETE;
 768                         } else {
 769                                 extended_usage++;
 770                                 continue;
 771                         }
 772                 /* -E clone=dup|zero */
 773                 } else if (strcmp(token, "clone") == 0) {
 774                         if (!arg) {
 775                                 extended_usage++;
 776                                 continue;
 777                         }
 778                         if (strcmp(arg, "dup") == 0) {
 779                                 ctx->clone = E2F_CLONE_DUP;
 780                         } else if (strcmp(arg, "zero") == 0) {
 781                                 ctx->clone = E2F_CLONE_ZERO;
 782                         } else {
 783                                 extended_usage++;
 784                                 continue;
 785                         }
 786                 } else if (strcmp(token, "expand_extra_isize") == 0) {
 787                         ctx->flags |= E2F_FLAG_EXPAND_EISIZE;
 788                         if (arg) {
 789                                 extended_usage++;
 790                                 continue;
 791                         }
 792                 /* -E inode_badness_threshold=<value> */
 793                 } else if (strcmp(token, "inode_badness_threshold") == 0) {
 794                         if (!arg) {
 795                                 extended_usage++;
 796                                 continue;
 797                         }
 798                         ctx->inode_badness_threshold = strtoul(arg, &p, 0);
 799                         if (*p != '\0' || ctx->inode_badness_threshold > 200) {
 800                                 fprintf(stderr, _("Invalid badness value.\n"));
 801                                 extended_usage++;
 802                                 continue;
 803                         }
 804                 } else if (strcmp(token, "journal_only") == 0) {
 805                         if (arg) {
 806                                 extended_usage++;
 807                                 continue;
 808                         }
 809                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 810                 } else if (strcmp(token, "discard") == 0) {
 811                         ctx->options |= E2F_OPT_DISCARD;
 812                         continue;
 813                 } else if (strcmp(token, "nodiscard") == 0) {
 814                         ctx->options &= ~E2F_OPT_DISCARD;
 815                         continue;
 816                 } else if (strcmp(token, "optimize_extents") == 0) {
 817                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 818                         continue;
 819                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 820                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 821                         continue;
 822                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 823                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 824                         continue;
 825                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 826                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 827                         continue;
 828                 } else if (strcmp(token, "log_filename") == 0) {
 829                         if (!arg)
 830                                 extended_usage++;
 831                         else
 832                                 ctx->log_fn = string_copy(ctx, arg, 0);
 833                         continue;
 834                 } else if (strcmp(token, "problem_log") == 0) {
 835                         if (!arg)
 836                                 extended_usage++;
 837                         else
 838                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 839                         continue;
 840                 } else if (strcmp(token, "bmap2extent") == 0) {
 841                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 842                         continue;
 843                 } else if (strcmp(token, "fixes_only") == 0) {
 844                         ctx->options |= E2F_OPT_FIXES_ONLY;
 845                         continue;
 846                 } else if (strcmp(token, "unshare_blocks") == 0) {
 847                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 848                         ctx->options |= E2F_OPT_FORCE;
 849                         continue;
 850                 } else {
 851                         fprintf(stderr, _("Unknown extended option: %s\n"),
 852                                 token);
 853                         extended_usage++;
 854                 }
 855         }
 856         free(buf);
 857
 858         if (extended_usage) {
 859                 fputs(_("\nExtended options are separated by commas, "
 860                        "and may take an argument which\n"
 861                        "is set off by an equals ('=') sign.  "
 862                        "Valid extended options are:\n\n"), stderr);
 863                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 864                 fputs("\tfragcheck\n", stderr);
 865                 fputs("\tjournal_only\n", stderr);
 866                 fputs("\tdiscard\n", stderr);
 867                 fputs("\tnodiscard\n", stderr);
 868                 fputs(("\tshared=<preserve|lost+found|delete>\n"), stderr);
 869                 fputs(("\tclone=<dup|zero>\n"), stderr);
 870                 fputs(("\texpand_extra_isize\n"), stderr);
 871                 fputs(("\tinode_badness_threhold=(value)\n"), stderr);
 872                 fputs("\toptimize_extents\n", stderr);
 873                 fputs("\tno_optimize_extents\n", stderr);
 874                 fputs("\tinode_count_fullmap\n", stderr);
 875                 fputs("\tno_inode_count_fullmap\n", stderr);
 876                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 877                 fputs("\tbmap2extent\n", stderr);
 878                 fputs("\tunshare_blocks\n", stderr);
 879                 fputs("\tfixes_only\n", stderr);
 880                 fputc('\n', stderr);
 881                 exit(1);
 882         }
 883 }
 884
 885 static void syntax_err_report(const char *filename, long err, int line_num)
 886 {
 887         fprintf(stderr,
 888                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 889                 filename, line_num, error_message(err));
 890         exit(FSCK_ERROR);
 891 }
 892
 893 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 894
 895 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 896 {
 897         int             flush = 0;
 898         int             c, fd;
 899 #ifdef MTRACE
 900         extern void     *mallwatch;
 901 #endif
 902         e2fsck_t        ctx;
 903         errcode_t       retval;
 904 #ifdef HAVE_SIGNAL_H
 905         struct sigaction        sa;
 906 #endif
 907         char            *cp;
 908         int             res;            /* result of sscanf */
 909 #ifdef CONFIG_JBD_DEBUG
 910         char            *jbd_debug;
 911 #endif
 912         unsigned long long phys_mem_kb;
 913
 914         retval = e2fsck_allocate_context(&ctx);
 915         if (retval)
 916                 return retval;
 917
 918         *ret_ctx = ctx;
 919         e2fsck_global_ctx = ctx;
 920
 921         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 922         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 923         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 924                 ctx->interactive = 1;
 925         } else {
 926                 ctx->start_meta[0] = '\001';
 927                 ctx->stop_meta[0] = '\002';
 928         }
 929         memset(bar, '=', sizeof(bar)-1);
 930         memset(spaces, ' ', sizeof(spaces)-1);
 931         add_error_table(&et_ext2_error_table);
 932         add_error_table(&et_prof_error_table);
 933         blkid_get_cache(&ctx->blkid, NULL);
 934
 935         if (argc && *argv)
 936                 ctx->program_name = *argv;
 937         else
 938                 ctx->program_name = "e2fsck";
 939
 940         cp = getenv("E2FSCK_CONFIG");
 941         if (cp != NULL)
 942                 config_fn[0] = cp;
 943         profile_set_syntax_err_cb(syntax_err_report);
 944         profile_init(config_fn, &ctx->profile);
 945
 946         initialize_profile_options(ctx);
 947
 948         phys_mem_kb = get_memory_size() / 1024;
 949         ctx->readahead_kb = ~0ULL;
 950         ctx->inode_badness_threshold = BADNESS_THRESHOLD;
 951
 952 #ifdef CONFIG_PFSCK
 953         while ((c = getopt(argc, argv, "pamnyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 954 #else
 955         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 956 #endif
 957                 switch (c) {
 958                 case 'C':
 959                         ctx->progress = e2fsck_update_progress;
 960                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 961                         if (res != 1)
 962                                 goto sscanf_err;
 963
 964                         if (ctx->progress_fd < 0) {
 965                                 ctx->progress = 0;
 966                                 ctx->progress_fd = ctx->progress_fd * -1;
 967                         }
 968                         if (!ctx->progress_fd)
 969                                 break;
 970                         /* Validate the file descriptor to avoid disasters */
 971                         fd = dup(ctx->progress_fd);
 972                         if (fd < 0) {
 973                                 fprintf(stderr,
 974                                 _("Error validating file descriptor %d: %s\n"),
 975                                         ctx->progress_fd,
 976                                         error_message(errno));
 977                                 fatal_error(ctx,
 978                         _("Invalid completion information file descriptor"));
 979                         } else
 980                                 close(fd);
 981                         break;
 982                 case 'D':
 983                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 984                         break;
 985                 case 'E':
 986                         parse_extended_opts(ctx, optarg);
 987                         break;
 988                 case 'p':
 989                 case 'a':
 990                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 991                         conflict_opt:
 992                                 fatal_error(ctx,
 993         _("Only one of the options -p/-a, -n or -y may be specified."));
 994                         }
 995                         ctx->options |= E2F_OPT_PREEN;
 996                         break;
 997 #ifdef CONFIG_PFSCK
 998                 case 'm':
 999                         ctx->options |= E2F_OPT_MULTITHREAD;
1000                         break;
1001 #endif
1002                 case 'n':
1003                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
1004                                 goto conflict_opt;
1005                         ctx->options |= E2F_OPT_NO;
1006                         break;
1007                 case 'y':
1008                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
1009                                 goto conflict_opt;
1010                         ctx->options |= E2F_OPT_YES;
1011                         break;
1012                 case 't':
1013 #ifdef RESOURCE_TRACK
1014                         if (ctx->options & E2F_OPT_TIME)
1015                                 ctx->options |= E2F_OPT_TIME2;
1016                         else
1017                                 ctx->options |= E2F_OPT_TIME;
1018 #else
1019                         fprintf(stderr, _("The -t option is not "
1020                                 "supported on this version of e2fsck.\n"));
1021 #endif
1022                         break;
1023                 case 'c':
1024                         if (cflag++)
1025                                 ctx->options |= E2F_OPT_WRITECHECK;
1026                         ctx->options |= E2F_OPT_CHECKBLOCKS;
1027                         break;
1028                 case 'r':
1029                         /* What we do by default, anyway! */
1030                         break;
1031                 case 'b':
1032                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
1033                         if (res != 1)
1034                                 goto sscanf_err;
1035                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
1036                         break;
1037                 case 'B':
1038                         ctx->blocksize = atoi(optarg);
1039                         break;
1040                 case 'I':
1041                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
1042                         if (res != 1)
1043                                 goto sscanf_err;
1044                         break;
1045                 case 'j':
1046                         ctx->journal_name = blkid_get_devname(ctx->blkid,
1047                                                               optarg, NULL);
1048                         if (!ctx->journal_name) {
1049                                 com_err(ctx->program_name, 0,
1050                                         _("Unable to resolve '%s'"),
1051                                         optarg);
1052                                 fatal_error(ctx, 0);
1053                         }
1054                         break;
1055                 case 'P':
1056                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
1057                         if (res != 1)
1058                                 goto sscanf_err;
1059                         break;
1060                 case 'L':
1061                         replace_bad_blocks++;
1062                         /* fall through */
1063                 case 'l':
1064                         if (bad_blocks_file)
1065                                 free(bad_blocks_file);
1066                         bad_blocks_file = string_copy(ctx, optarg, 0);
1067                         break;
1068                 case 'd':
1069                         ctx->options |= E2F_OPT_DEBUG;
1070                         break;
1071                 case 'f':
1072                         ctx->options |= E2F_OPT_FORCE;
1073                         break;
1074                 case 'F':
1075                         flush = 1;
1076                         break;
1077                 case 'v':
1078                         verbose = 1;
1079                         break;
1080                 case 'V':
1081                         show_version_only = 1;
1082                         break;
1083 #ifdef MTRACE
1084                 case 'M':
1085                         mallwatch = (void *) strtol(optarg, NULL, 0);
1086                         break;
1087 #endif
1088                 case 'N':
1089                         ctx->device_name = string_copy(ctx, optarg, 0);
1090                         break;
1091                 case 'k':
1092                         keep_bad_blocks++;
1093                         break;
1094                 case 'z':
1095                         ctx->undo_file = optarg;
1096                         break;
1097                 default:
1098                         usage(ctx);
1099                 }
1100         if (show_version_only)
1101                 return 0;
1102         if (optind != argc - 1)
1103                 usage(ctx);
1104         if ((ctx->options & E2F_OPT_NO) &&
1105             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1106                 com_err(ctx->program_name, 0, "%s",
1107                         _("The -n and -D options are incompatible."));
1108                 fatal_error(ctx, 0);
1109         }
1110         if ((ctx->options & E2F_OPT_NO) && cflag) {
1111                 com_err(ctx->program_name, 0, "%s",
1112                         _("The -n and -c options are incompatible."));
1113                 fatal_error(ctx, 0);
1114         }
1115         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1116                 com_err(ctx->program_name, 0, "%s",
1117                         _("The -n and -l/-L options are incompatible."));
1118                 fatal_error(ctx, 0);
1119         }
1120 #ifdef CONFIG_PFSCK
1121         if (ctx->options & E2F_OPT_MULTITHREAD) {
1122                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1123                         com_err(ctx->program_name, 0, "%s",
1124                                 _("The -m option should be used together with one of -p/-y/-n options."));
1125                         fatal_error(ctx, 0);
1126                 }
1127                 if (ctx->progress) {
1128                         com_err(ctx->program_name, 0, "%s",
1129                                 _("Only one of the options -C or -m may be specified."));
1130                         fatal_error(ctx, 0);
1131                 }
1132         }
1133 #endif
1134         if (ctx->options & E2F_OPT_NO)
1135                 ctx->options |= E2F_OPT_READONLY;
1136
1137         ctx->io_options = strchr(argv[optind], '?');
1138         if (ctx->io_options)
1139                 *ctx->io_options++ = 0;
1140         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
1141         if (!ctx->filesystem_name) {
1142                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1143                         argv[optind]);
1144                 fatal_error(ctx, 0);
1145         }
1146
1147         /* Complain about mutually exclusive rebuilding activities */
1148         if (getenv("E2FSCK_FIXES_ONLY"))
1149                 ctx->options |= E2F_OPT_FIXES_ONLY;
1150         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1151             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1152                 com_err(ctx->program_name, 0, "%s",
1153                         _("The -D and -E fixes_only options are incompatible."));
1154                 fatal_error(ctx, 0);
1155         }
1156         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1157             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1158                 com_err(ctx->program_name, 0, "%s",
1159                         _("The -E bmap2extent and fixes_only options are incompatible."));
1160                 fatal_error(ctx, 0);
1161         }
1162
1163         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1164                             &c);
1165         if (c)
1166                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1167         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1168                             &c);
1169         if (c)
1170                 verbose = 1;
1171
1172         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1173                             0, 0, &c);
1174         if (c)
1175                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1176
1177         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1178                             0, 0, &c);
1179         if (c)
1180                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1181
1182         if (ctx->readahead_kb == ~0ULL) {
1183                 profile_get_integer(ctx->profile, "options",
1184                                     "readahead_mem_pct", 0, -1, &c);
1185                 if (c >= 0 && c <= 100)
1186                         ctx->readahead_kb = phys_mem_kb * c / 100;
1187                 profile_get_integer(ctx->profile, "options",
1188                                     "readahead_kb", 0, -1, &c);
1189                 if (c >= 0)
1190                         ctx->readahead_kb = c;
1191                 if (ctx->readahead_kb != ~0ULL &&
1192                     ctx->readahead_kb > phys_mem_kb)
1193                         ctx->readahead_kb = phys_mem_kb;
1194         }
1195
1196         /* Turn off discard in read-only mode */
1197         if ((ctx->options & E2F_OPT_NO) &&
1198             (ctx->options & E2F_OPT_DISCARD))
1199                 ctx->options &= ~E2F_OPT_DISCARD;
1200
1201         if (flush) {
1202                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1203                 if (fd < 0) {
1204                         com_err("open", errno,
1205                                 _("while opening %s for flushing"),
1206                                 ctx->filesystem_name);
1207                         fatal_error(ctx, 0);
1208                 }
1209                 if ((retval = ext2fs_sync_device(fd, 1))) {
1210                         com_err("ext2fs_sync_device", retval,
1211                                 _("while trying to flush %s"),
1212                                 ctx->filesystem_name);
1213                         fatal_error(ctx, 0);
1214                 }
1215                 close(fd);
1216         }
1217         if (cflag && bad_blocks_file) {
1218                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1219                                         "be both used at the same time.\n"));
1220                 exit(FSCK_USAGE);
1221         }
1222 #ifdef HAVE_SIGNAL_H
1223         /*
1224          * Set up signal action
1225          */
1226         memset(&sa, 0, sizeof(struct sigaction));
1227         sa.sa_handler = signal_cancel;
1228         sigaction(SIGINT, &sa, 0);
1229         sigaction(SIGTERM, &sa, 0);
1230 #ifdef SA_RESTART
1231         sa.sa_flags = SA_RESTART;
1232 #endif
1233         if ((ctx->options & E2F_OPT_MULTITHREAD) == 0) {
1234                 sa.sa_handler = signal_progress_on;
1235                 sigaction(SIGUSR1, &sa, 0);
1236                 sa.sa_handler = signal_progress_off;
1237                 sigaction(SIGUSR2, &sa, 0);
1238         }
1239 #endif
1240
1241         /* Update our PATH to include /sbin if we need to run badblocks  */
1242         if (cflag) {
1243                 char *oldpath = getenv("PATH");
1244                 char *newpath;
1245                 int len = sizeof(PATH_SET) + 1;
1246
1247                 if (oldpath)
1248                         len += strlen(oldpath);
1249
1250                 newpath = malloc(len);
1251                 if (!newpath)
1252                         fatal_error(ctx, "Couldn't malloc() newpath");
1253                 strcpy(newpath, PATH_SET);
1254
1255                 if (oldpath) {
1256                         strcat(newpath, ":");
1257                         strcat(newpath, oldpath);
1258                 }
1259                 putenv(newpath);
1260         }
1261 #ifdef CONFIG_JBD_DEBUG
1262         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1263         if (jbd_debug) {
1264                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1265                 if (res != 1) {
1266                         fprintf(stderr,
1267                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1268                                 jbd_debug);
1269                         exit (1);
1270                 }
1271         }
1272 #endif
1273         return 0;
1274
1275 sscanf_err:
1276         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1277                 c, optarg);
1278         exit (1);
1279 }
1280
1281 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1282                              ext2_filsys *ret_fs)
1283 {
1284         errcode_t retval;
1285
1286         *ret_fs = NULL;
1287         if (ctx->superblock && ctx->blocksize) {
1288                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1289                                       flags, ctx->superblock, ctx->blocksize,
1290                                       io_ptr, ret_fs);
1291         } else if (ctx->superblock) {
1292                 int blocksize;
1293                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1294                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1295                         if (*ret_fs) {
1296                                 ext2fs_free(*ret_fs);
1297                                 *ret_fs = NULL;
1298                         }
1299                         retval = ext2fs_open2(ctx->filesystem_name,
1300                                               ctx->io_options, flags,
1301                                               ctx->superblock, blocksize,
1302                                               io_ptr, ret_fs);
1303                         if (!retval)
1304                                 break;
1305                 }
1306         } else
1307                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1308                                       flags, 0, 0, io_ptr, ret_fs);
1309
1310         if (retval == 0) {
1311                 (*ret_fs)->priv_data = ctx;
1312                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1313                                        "default", NULL);
1314         }
1315         return retval;
1316 }
1317
1318 static const char *my_ver_string = E2FSPROGS_VERSION;
1319 static const char *my_ver_date = E2FSPROGS_DATE;
1320
1321 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1322 {
1323         struct mmp_struct *mmp_s;
1324         unsigned int mmp_check_interval;
1325         errcode_t retval = 0;
1326         struct problem_context pctx;
1327         unsigned int wait_time = 0;
1328
1329         clear_problem_context(&pctx);
1330         if (fs->mmp_buf == NULL) {
1331                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1332                 if (retval)
1333                         goto check_error;
1334         }
1335
1336         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1337         if (retval)
1338                 goto check_error;
1339
1340         mmp_s = fs->mmp_buf;
1341
1342         mmp_check_interval = fs->super->s_mmp_update_interval;
1343         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1344                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1345
1346         /*
1347          * If check_interval in MMP block is larger, use that instead of
1348          * check_interval from the superblock.
1349          */
1350         if (mmp_s->mmp_check_interval > mmp_check_interval)
1351                 mmp_check_interval = mmp_s->mmp_check_interval;
1352
1353         wait_time = mmp_check_interval * 2 + 1;
1354
1355         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1356                 retval = 0;
1357         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1358                 retval = EXT2_ET_MMP_FSCK_ON;
1359         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1360                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1361
1362         if (retval)
1363                 goto check_error;
1364
1365         /* Print warning if e2fsck will wait for more than 20 secs. */
1366         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1367                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1368                                "time is %u seconds. Please wait...\n"),
1369                         mmp_check_interval, wait_time * 2);
1370         }
1371
1372         return 0;
1373
1374 check_error:
1375
1376         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1377                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1378                         fs->super->s_mmp_block = 0;
1379                         ext2fs_mark_super_dirty(fs);
1380                         retval = 0;
1381                 }
1382         } else if (retval == EXT2_ET_MMP_FAILED) {
1383                 com_err(ctx->program_name, retval, "%s",
1384                         _("while checking MMP block"));
1385                 dump_mmp_msg(fs->mmp_buf, NULL);
1386         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1387                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1388                 com_err(ctx->program_name, retval, "%s",
1389                         _("while checking MMP block"));
1390                 dump_mmp_msg(fs->mmp_buf,
1391                              _("If you are sure the filesystem is not "
1392                                "in use on any node, run:\n"
1393                                "'tune2fs -f -E clear_mmp %s'\n"),
1394                              ctx->device_name);
1395         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1396                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1397                         ext2fs_mmp_clear(fs);
1398                         retval = 0;
1399                 }
1400         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1401                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1402                         ext2fs_mmp_clear(fs);
1403                         retval = 0;
1404                 }
1405         } else
1406                 com_err(ctx->program_name, retval, "%s",
1407                         _("while reading MMP block"));
1408         return retval;
1409 }
1410
1411 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1412 {
1413         errcode_t retval = ENOMEM;
1414         char *tdb_dir = NULL, *tdb_file = NULL;
1415         char *dev_name, *tmp_name;
1416         int free_tdb_dir = 0;
1417
1418         /* (re)open a specific undo file */
1419         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1420                 retval = set_undo_io_backing_manager(*io_ptr);
1421                 if (retval)
1422                         goto err;
1423                 *io_ptr = undo_io_manager;
1424                 retval = set_undo_io_backup_file(ctx->undo_file);
1425                 if (retval)
1426                         goto err;
1427                 printf(_("Overwriting existing filesystem; this can be undone "
1428                          "using the command:\n"
1429                          "    e2undo %s %s\n\n"),
1430                         ctx->undo_file, ctx->filesystem_name);
1431                 return retval;
1432         }
1433
1434         /*
1435          * Configuration via a conf file would be
1436          * nice
1437          */
1438         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1439         if (!tdb_dir) {
1440                 profile_get_string(ctx->profile, "defaults",
1441                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1442                                    &tdb_dir);
1443                 free_tdb_dir = 1;
1444         }
1445
1446         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1447             access(tdb_dir, W_OK)) {
1448                 if (free_tdb_dir)
1449                         free(tdb_dir);
1450                 return 0;
1451         }
1452
1453         tmp_name = strdup(ctx->filesystem_name);
1454         if (!tmp_name)
1455                 goto errout;
1456         dev_name = basename(tmp_name);
1457         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1458         if (!tdb_file) {
1459                 free(tmp_name);
1460                 goto errout;
1461         }
1462         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1463         free(tmp_name);
1464
1465         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1466                 retval = errno;
1467                 com_err(ctx->program_name, retval,
1468                         _("while trying to delete %s"), tdb_file);
1469                 goto errout;
1470         }
1471
1472         retval = set_undo_io_backing_manager(*io_ptr);
1473         if (retval)
1474                 goto errout;
1475         *io_ptr = undo_io_manager;
1476         retval = set_undo_io_backup_file(tdb_file);
1477         if (retval)
1478                 goto errout;
1479         printf(_("Overwriting existing filesystem; this can be undone "
1480                  "using the command:\n"
1481                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1482
1483         if (free_tdb_dir)
1484                 free(tdb_dir);
1485         free(tdb_file);
1486         return 0;
1487
1488 errout:
1489         if (free_tdb_dir)
1490                 free(tdb_dir);
1491         free(tdb_file);
1492 err:
1493         com_err(ctx->program_name, retval, "%s",
1494                 _("while trying to setup undo file\n"));
1495         return retval;
1496 }
1497
1498 int main (int argc, char *argv[])
1499 {
1500         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1501         int             exit_value = FSCK_OK;
1502         ext2_filsys     fs = 0;
1503         io_manager      io_ptr;
1504         struct ext2_super_block *sb;
1505         const char      *lib_ver_date;
1506         int             my_ver, lib_ver;
1507         e2fsck_t        ctx;
1508         blk64_t         orig_superblock = ~(blk64_t)0;
1509         struct problem_context pctx;
1510         int flags, run_result, was_changed;
1511         int journal_size;
1512         int sysval, sys_page_size = 4096;
1513         int old_bitmaps;
1514         __u32 features[3];
1515         char *cp;
1516         enum quota_type qtype;
1517
1518         clear_problem_context(&pctx);
1519         sigcatcher_setup();
1520 #ifdef MTRACE
1521         mtrace();
1522 #endif
1523 #ifdef MCHECK
1524         mcheck(0);
1525 #endif
1526 #ifdef ENABLE_NLS
1527         setlocale(LC_MESSAGES, "");
1528         setlocale(LC_CTYPE, "");
1529         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1530         textdomain(NLS_CAT_NAME);
1531         set_com_err_gettext(gettext);
1532 #endif
1533         my_ver = ext2fs_parse_version_string(my_ver_string);
1534         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1535         if (my_ver > lib_ver) {
1536                 fprintf( stderr, "%s",
1537                          _("Error: ext2fs library version out of date!\n"));
1538                 show_version_only++;
1539         }
1540
1541         retval = PRS(argc, argv, &ctx);
1542         if (retval) {
1543                 com_err("e2fsck", retval, "%s",
1544                         _("while trying to initialize program"));
1545                 exit(FSCK_ERROR);
1546         }
1547         reserve_stdio_fds();
1548
1549         ctx->global_ctx = NULL;
1550         set_up_logging(ctx);
1551         if (ctx->logf) {
1552                 int i;
1553
1554                 fputs("E2fsck run: ", ctx->logf);
1555                 for (i = 0; i < argc; i++) {
1556                         if (i)
1557                                 fputc(' ', ctx->logf);
1558                         fputs(argv[i], ctx->logf);
1559                 }
1560                 fputc('\n', ctx->logf);
1561         }
1562         if (ctx->problem_logf) {
1563                 int i;
1564
1565                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1566                       ctx->problem_logf);
1567                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1568                         ctx->now);
1569                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1570                         argv[0]);
1571                 for (i = 1; i < argc; i++)
1572                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1573                 fputs("/>\n", ctx->problem_logf);
1574         }
1575
1576         init_resource_track(&ctx->global_rtrack, NULL);
1577         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1578                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1579                          my_ver_date);
1580
1581         if (show_version_only) {
1582                 log_err(ctx, _("\tUsing %s, %s\n"),
1583                         error_message(EXT2_ET_BASE), lib_ver_date);
1584                 exit(FSCK_OK);
1585         }
1586
1587         check_mount(ctx);
1588
1589         if (!(ctx->options & E2F_OPT_PREEN) &&
1590             !(ctx->options & E2F_OPT_NO) &&
1591             !(ctx->options & E2F_OPT_YES)) {
1592                 if (!ctx->interactive)
1593                         fatal_error(ctx,
1594                                     _("need terminal for interactive repairs"));
1595         }
1596         ctx->superblock = ctx->use_superblock;
1597
1598         flags = EXT2_FLAG_SKIP_MMP;
1599 restart:
1600 #ifdef CONFIG_TESTIO_DEBUG
1601         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1602                 io_ptr = test_io_manager;
1603                 test_io_backing_manager = unix_io_manager;
1604         } else
1605 #endif
1606                 io_ptr = unix_io_manager;
1607         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1608         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1609                             &old_bitmaps);
1610         if (!old_bitmaps)
1611                 flags |= EXT2_FLAG_64BITS;
1612         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1613                 flags |= EXT2_FLAG_RW;
1614                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1615                       ctx->mount_flags & EXT2_MF_READONLY))
1616                         flags |= EXT2_FLAG_EXCLUSIVE;
1617                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1618                     (ctx->options & E2F_OPT_FORCE))
1619                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1620         }
1621
1622         if (ctx->undo_file) {
1623                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1624                 if (retval)
1625                         exit(FSCK_ERROR);
1626         }
1627
1628         ctx->openfs_flags = flags;
1629         ctx->io_manager = io_ptr;
1630         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1631
1632         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1633             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1634             ((retval == EXT2_ET_BAD_MAGIC) ||
1635              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1636              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1637              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1638                 if (retval) {
1639                         pctx.errcode = retval;
1640                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1641                 }
1642                 if (retval2) {
1643                         pctx.errcode = retval2;
1644                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1645                 }
1646                 pctx.errcode = 0;
1647                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1648                         retval = retval2;
1649                         goto failure;
1650                 }
1651                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1652                         ext2fs_free(fs);
1653                         fs = NULL;
1654                 }
1655                 if (!fs || (fs->group_desc_count > 1)) {
1656                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1657                                 ctx->program_name,
1658                                 retval ? _("Superblock invalid,") :
1659                                 _("Group descriptors look bad..."));
1660                         orig_superblock = ctx->superblock;
1661                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1662                         if (fs)
1663                                 ext2fs_close_free(&fs);
1664                         orig_retval = retval;
1665                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1666                         if ((orig_retval == 0) && retval != 0) {
1667                                 if (fs)
1668                                         ext2fs_close_free(&fs);
1669                                 log_out(ctx, _("%s: %s while using the "
1670                                                "backup blocks"),
1671                                         ctx->program_name,
1672                                         error_message(retval));
1673                                 log_out(ctx, _("%s: going back to original "
1674                                                "superblock\n"),
1675                                         ctx->program_name);
1676                                 ctx->superblock = orig_superblock;
1677                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1678                         }
1679                 }
1680         }
1681         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1682              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1683             fs && fs->super) {
1684                 sb = fs->super;
1685                 features[0] = (sb->s_feature_compat &
1686                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1687                 features[1] = (sb->s_feature_incompat &
1688                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1689                 features[2] = (sb->s_feature_ro_compat &
1690                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1691                 if (features[0] || features[1] || features[2])
1692                         goto print_unsupp_features;
1693         }
1694 failure:
1695         if (retval) {
1696                 if (orig_retval)
1697                         retval = orig_retval;
1698                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1699                         ctx->filesystem_name);
1700                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1701                         log_out(ctx, "%s",
1702                                 _("The filesystem revision is apparently "
1703                                   "too high for this version of e2fsck.\n"
1704                                   "(Or the filesystem superblock "
1705                                   "is corrupt)\n\n"));
1706                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1707                 } else if (retval == EXT2_ET_SHORT_READ)
1708                         log_out(ctx, "%s",
1709                                 _("Could this be a zero-length partition?\n"));
1710                 else if ((retval == EPERM) || (retval == EACCES))
1711                         log_out(ctx, _("You must have %s access to the "
1712                                        "filesystem or be root\n"),
1713                                (ctx->options & E2F_OPT_READONLY) ?
1714                                "r/o" : "r/w");
1715                 else if (retval == ENXIO)
1716                         log_out(ctx, "%s",
1717                                 _("Possibly non-existent or swap device?\n"));
1718                 else if (retval == EBUSY)
1719                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1720                                          "exclusively by another program?\n"));
1721                 else if (retval == ENOENT)
1722                         log_out(ctx, "%s",
1723                                 _("Possibly non-existent device?\n"));
1724 #ifdef EROFS
1725                 else if (retval == EROFS)
1726                         log_out(ctx, "%s", _("Disk write-protected; use the "
1727                                              "-n option to do a read-only\n"
1728                                              "check of the device.\n"));
1729 #endif
1730                 else {
1731                         /*
1732                          * Let's try once more will less consistency checking
1733                          * so that we are able to recover from more errors
1734                          * (e.g. some tool messing up some value in the sb).
1735                          */
1736                         if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) &&
1737                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1738                                 if (fs)
1739                                         ext2fs_close_free(&fs);
1740                                 log_out(ctx, _("%s: Trying to load superblock "
1741                                         "despite errors...\n"),
1742                                         ctx->program_name);
1743                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1744                                 /*
1745                                  * If we tried backup sb, revert to the
1746                                  * original one now.
1747                                  */
1748                                 if (orig_superblock != ~(blk64_t)0)
1749                                         ctx->superblock = orig_superblock;
1750                                 goto restart;
1751                         }
1752                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1753                         if (retval == EXT2_ET_BAD_MAGIC)
1754                                 check_plausibility(ctx->filesystem_name,
1755                                                    CHECK_FS_EXIST, NULL);
1756                 }
1757                 fatal_error(ctx, 0);
1758         }
1759         /*
1760          * We only update the master superblock because (a) paranoia;
1761          * we don't want to corrupt the backup superblocks, and (b) we
1762          * don't need to update the mount count and last checked
1763          * fields in the backup superblock (the kernel doesn't update
1764          * the backup superblocks anyway).  With newer versions of the
1765          * library this flag is set by ext2fs_open2(), but we set this
1766          * here just to be sure.  (No, we don't support e2fsck running
1767          * with some other libext2fs than the one that it was shipped
1768          * with, but just in case....)
1769          */
1770         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1771
1772         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1773                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1774                 int need_restart = 0;
1775
1776                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1777                                                        blocksize,
1778                                                        &ctx->num_blocks);
1779                 /*
1780                  * The floppy driver refuses to allow anyone else to
1781                  * open the device if has been opened with O_EXCL;
1782                  * this is unlike other block device drivers in Linux.
1783                  * To handle this, we close the filesystem and then
1784                  * reopen the filesystem after we get the device size.
1785                  */
1786                 if (pctx.errcode == EBUSY) {
1787                         ext2fs_close_free(&fs);
1788                         need_restart++;
1789                         pctx.errcode =
1790                                 ext2fs_get_device_size2(ctx->filesystem_name,
1791                                                         blocksize,
1792                                                         &ctx->num_blocks);
1793                 }
1794                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1795                         ctx->num_blocks = 0;
1796                 else if (pctx.errcode) {
1797                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1798                         ctx->flags |= E2F_FLAG_ABORT;
1799                         fatal_error(ctx, 0);
1800                 }
1801                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1802                 if (need_restart)
1803                         goto restart;
1804         }
1805
1806         ctx->fs = fs;
1807         fs->now = ctx->now;
1808         sb = fs->super;
1809
1810         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1811                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1812                         _("while trying to open %s"),
1813                         ctx->filesystem_name);
1814         get_newer:
1815                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1816         }
1817
1818         /*
1819          * Set the device name, which is used whenever we print error
1820          * or informational messages to the user.
1821          */
1822         if (ctx->device_name == 0 && sb->s_volume_name[0])
1823                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1824                                                sizeof(sb->s_volume_name));
1825
1826         if (ctx->device_name == 0)
1827                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1828         for (cp = ctx->device_name; *cp; cp++)
1829                 if (isspace(*cp) || *cp == ':')
1830                         *cp = '_';
1831
1832         if (ctx->problem_logf) {
1833
1834                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1835                         ctx->filesystem_name);
1836                 if (!uuid_is_null(sb->s_uuid)) {
1837                         char buf[48];
1838
1839                         uuid_unparse(sb->s_uuid, buf);
1840                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1841                 }
1842                 if (sb->s_volume_name[0])
1843                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1844                                 EXT2_LEN_STR(sb->s_volume_name));
1845
1846                 fputs("/>\n", ctx->problem_logf);
1847         }
1848
1849         ehandler_init(fs->io);
1850
1851         if (ext2fs_has_feature_mmp(fs->super) &&
1852             (flags & EXT2_FLAG_SKIP_MMP)) {
1853                 if (e2fsck_check_mmp(fs, ctx))
1854                         fatal_error(ctx, 0);
1855
1856                 /*
1857                  * Restart in order to reopen fs but this time start mmp.
1858                  */
1859                 ext2fs_close_free(&ctx->fs);
1860                 flags &= ~EXT2_FLAG_SKIP_MMP;
1861                 goto restart;
1862         }
1863
1864         if (ctx->logf)
1865                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1866                         e2p_uuid2str(sb->s_uuid));
1867
1868         /*
1869          * Make sure the ext3 superblock fields are consistent.
1870          */
1871         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1872                 retval = e2fsck_check_ext3_journal(ctx);
1873                 if (retval) {
1874                         com_err(ctx->program_name, retval,
1875                                 _("while checking journal for %s"),
1876                                 ctx->device_name);
1877                         fatal_error(ctx,
1878                                 _("Cannot proceed with file system check"));
1879                 }
1880         }
1881
1882         /*
1883          * Check to see if we need to do ext3-style recovery.  If so,
1884          * do it, and then restart the fsck.
1885          */
1886         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1887                 if (ctx->options & E2F_OPT_READONLY) {
1888                         log_out(ctx, "%s",
1889                                 _("Warning: skipping journal recovery because "
1890                                   "doing a read-only filesystem check.\n"));
1891                         io_channel_flush(ctx->fs->io);
1892                 } else {
1893                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1894                                 /*
1895                                  * Whoops, we attempted to run the
1896                                  * journal twice.  This should never
1897                                  * happen, unless the hardware or
1898                                  * device driver is being bogus.
1899                                  */
1900                                 com_err(ctx->program_name, 0,
1901                                         _("unable to set superblock flags "
1902                                           "on %s\n"), ctx->device_name);
1903                                 fatal_error(ctx, 0);
1904                         }
1905                         retval = e2fsck_run_ext3_journal(ctx);
1906                         if (retval == EFSBADCRC) {
1907                                 log_out(ctx, _("Journal checksum error "
1908                                                "found in %s\n"),
1909                                         ctx->device_name);
1910                         } else if (retval == EFSCORRUPTED) {
1911                                 log_out(ctx, _("Journal corrupted in %s\n"),
1912                                         ctx->device_name);
1913                         } else if (retval) {
1914                                 com_err(ctx->program_name, retval,
1915                                 _("while recovering journal of %s"),
1916                                         ctx->device_name);
1917                         }
1918                         ext2fs_close_free(&ctx->fs);
1919                         ctx->flags |= E2F_FLAG_RESTARTED;
1920                         goto restart;
1921                 }
1922         }
1923
1924         /*
1925          * Check for compatibility with the feature sets.  We need to
1926          * be more stringent than ext2fs_open().
1927          */
1928         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1929         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1930         features[2] = (sb->s_feature_ro_compat &
1931                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1932 print_unsupp_features:
1933         if (features[0] || features[1] || features[2]) {
1934                 int     i, j;
1935                 __u32   *mask = features, m;
1936
1937                 log_err(ctx, _("%s has unsupported feature(s):"),
1938                         ctx->filesystem_name);
1939
1940                 for (i=0; i <3; i++,mask++) {
1941                         for (j=0,m=1; j < 32; j++, m<<=1) {
1942                                 if (*mask & m)
1943                                         log_err(ctx, " %s",
1944                                                 e2p_feature2string(i, m));
1945                         }
1946                 }
1947                 log_err(ctx, "\n");
1948                 goto get_newer;
1949         }
1950
1951         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1952                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1953                         ctx->filesystem_name, sb->s_encoding);
1954                 goto get_newer;
1955         }
1956
1957         /*
1958          * If the user specified a specific superblock, presumably the
1959          * master superblock has been trashed.  So we mark the
1960          * superblock as dirty, so it can be written out.
1961          */
1962         if (ctx->superblock &&
1963             !(ctx->options & E2F_OPT_READONLY))
1964                 ext2fs_mark_super_dirty(fs);
1965
1966         /*
1967          * Calculate the number of filesystem blocks per pagesize.  If
1968          * fs->blocksize > page_size, set the number of blocks per
1969          * pagesize to 1 to avoid division by zero errors.
1970          */
1971 #ifdef _SC_PAGESIZE
1972         sysval = sysconf(_SC_PAGESIZE);
1973         if (sysval > 0)
1974                 sys_page_size = sysval;
1975 #endif /* _SC_PAGESIZE */
1976         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1977         if (ctx->blocks_per_page == 0)
1978                 ctx->blocks_per_page = 1;
1979
1980         if (ctx->superblock)
1981                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1982         ext2fs_mark_valid(fs);
1983         check_super_block(ctx);
1984         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1985                 fatal_error(ctx, 0);
1986         check_if_skip(ctx);
1987
1988         if (EXT2_GOOD_OLD_INODE_SIZE + sb->s_want_extra_isize >
1989                                                         EXT2_INODE_SIZE(sb)) {
1990                 if (fix_problem(ctx, PR_0_WANT_EXTRA_ISIZE_INVALID, &pctx))
1991                         sb->s_want_extra_isize =
1992                                 sizeof(struct ext2_inode_large) -
1993                                 EXT2_GOOD_OLD_INODE_SIZE;
1994         }
1995         if (EXT2_GOOD_OLD_INODE_SIZE + sb->s_min_extra_isize >
1996                                                         EXT2_INODE_SIZE(sb)) {
1997                 if (fix_problem(ctx, PR_0_MIN_EXTRA_ISIZE_INVALID, &pctx))
1998                         sb->s_min_extra_isize = 0;
1999         }
2000         if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
2001                 ctx->want_extra_isize = sizeof(struct ext2_inode_large) -
2002                                                      EXT2_GOOD_OLD_INODE_SIZE;
2003                 ctx->min_extra_isize = ~0L;
2004                 if (EXT2_HAS_RO_COMPAT_FEATURE(sb,
2005                                        EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) {
2006                         if (ctx->want_extra_isize < sb->s_want_extra_isize)
2007                                 ctx->want_extra_isize = sb->s_want_extra_isize;
2008                         if (ctx->want_extra_isize < sb->s_min_extra_isize)
2009                                 ctx->want_extra_isize = sb->s_min_extra_isize;
2010                 }
2011         } else {
2012                 /* Leave extra_isize set, it is harmless, and clearing it
2013                  * here breaks some regression tests by printing an extra
2014                  * message to the output for very little value. */
2015                 sb->s_want_extra_isize = 0;
2016                 sb->s_min_extra_isize = 0;
2017                 ctx->flags &= ~E2F_FLAG_EXPAND_EISIZE;
2018         }
2019
2020         if (ctx->options & E2F_OPT_READONLY) {
2021                 if (ctx->flags & (E2F_FLAG_EXPAND_EISIZE)) {
2022                         fprintf(stderr, _("Cannot enable EXTRA_ISIZE feature "
2023                                           "on read-only filesystem\n"));
2024                         exit(1);
2025                 }
2026         } else {
2027                 if (sb->s_want_extra_isize > sb->s_min_extra_isize &&
2028                     (sb->s_feature_ro_compat &
2029                      EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE))
2030                         ctx->flags |= E2F_FLAG_EXPAND_EISIZE;
2031         }
2032
2033         check_resize_inode(ctx);
2034         if (bad_blocks_file)
2035                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
2036         else if (cflag)
2037                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
2038         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2039                 fatal_error(ctx, 0);
2040
2041         /*
2042          * Mark the system as valid, 'til proven otherwise
2043          */
2044         ext2fs_mark_valid(fs);
2045
2046         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
2047         if (retval) {
2048                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
2049                         ctx->program_name, error_message(retval));
2050                 preenhalt(ctx);
2051                 log_out(ctx, "%s", _("This doesn't bode well, "
2052                                      "but we'll try to go on...\n"));
2053         }
2054
2055         /*
2056          * Save the journal size in megabytes.
2057          * Try and use the journal size from the backup else let e2fsck
2058          * find the default journal size.
2059          */
2060         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
2061                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
2062                                (sb->s_jnl_blocks[16] >> 20);
2063         else
2064                 journal_size = -1;
2065
2066         if (ext2fs_has_feature_quota(sb)) {
2067                 /* Quotas were enabled. Do quota accounting during fsck. */
2068                 clear_problem_context(&pctx);
2069                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
2070                 if (pctx.errcode) {
2071                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
2072                         fatal_error(ctx, 0);
2073                 }
2074         }
2075
2076         run_result = e2fsck_run(ctx);
2077         e2fsck_clear_progbar(ctx);
2078
2079         if (!ctx->invalid_bitmaps &&
2080             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
2081                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
2082                         if (journal_size < 1024)
2083                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
2084                         if (journal_size < 0) {
2085                                 ext2fs_clear_feature_journal(fs->super);
2086                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2087                                 log_out(ctx, "%s: Couldn't determine "
2088                                         "journal size\n", ctx->program_name);
2089                                 goto no_journal;
2090                         }
2091                         log_out(ctx, _("Creating journal (%d blocks): "),
2092                                journal_size);
2093                         fflush(stdout);
2094                         retval = ext2fs_add_journal_inode(fs,
2095                                                           journal_size, 0);
2096                         if (retval) {
2097                                 log_out(ctx, "%s: while trying to create "
2098                                         "journal\n", error_message(retval));
2099                                 goto no_journal;
2100                         }
2101                         log_out(ctx, "%s", _(" Done.\n"));
2102                         log_out(ctx, "%s",
2103                                 _("\n*** journal has been regenerated ***\n"));
2104                 }
2105         }
2106 no_journal:
2107
2108         if (run_result & E2F_FLAG_ABORT) {
2109                 fatal_error(ctx, _("aborted"));
2110         } else if (run_result & E2F_FLAG_CANCEL) {
2111                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
2112                         ctx->device_name : ctx->filesystem_name);
2113                 exit_value |= FSCK_CANCELED;
2114         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
2115                 int needs_writeout;
2116
2117                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
2118                         if (*quota_sb_inump(sb, qtype) == 0)
2119                                 continue;
2120                         needs_writeout = 0;
2121                         pctx.num = qtype;
2122                         retval = quota_compare_and_update(ctx->qctx, qtype,
2123                                                           &needs_writeout);
2124                         if ((retval || needs_writeout) &&
2125                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
2126                                 pctx.errcode = quota_write_inode(ctx->qctx,
2127                                                                  1 << qtype);
2128                                 if (pctx.errcode)
2129                                         (void) fix_problem(ctx,
2130                                                 PR_6_WRITE_QUOTAS, &pctx);
2131                         }
2132                 }
2133                 quota_release_context(&ctx->qctx);
2134         }
2135
2136         if (run_result == E2F_FLAG_RESTART) {
2137                 log_out(ctx, "%s",
2138                         _("Restarting e2fsck from the beginning...\n"));
2139                 retval = e2fsck_reset_context(ctx);
2140                 if (retval) {
2141                         com_err(ctx->program_name, retval, "%s",
2142                                 _("while resetting context"));
2143                         fatal_error(ctx, 0);
2144                 }
2145                 ext2fs_close_free(&ctx->fs);
2146                 goto restart;
2147         }
2148
2149 #ifdef MTRACE
2150         mtrace_print("Cleanup");
2151 #endif
2152         was_changed = ext2fs_test_changed(fs);
2153         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2154             !(ctx->options & E2F_OPT_READONLY)) {
2155                 if (ext2fs_test_valid(fs)) {
2156                         if (!(sb->s_state & EXT2_VALID_FS))
2157                                 exit_value |= FSCK_NONDESTRUCT;
2158                         sb->s_state = EXT2_VALID_FS;
2159                         if (check_backup_super_block(ctx))
2160                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2161                 } else
2162                         sb->s_state &= ~EXT2_VALID_FS;
2163                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2164                         sb->s_lastcheck = ctx->now;
2165                 sb->s_mnt_count = 0;
2166                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2167                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2168                 if (pctx.errcode)
2169                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2170                 ext2fs_mark_super_dirty(fs);
2171         }
2172
2173         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2174             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2175             (ctx->options & E2F_OPT_NO))
2176                 /* Don't try to write or flush I/O, we just wanted to know whether or
2177                  * not there were enough free blocks to undo deduplication.
2178                  */
2179                 goto skip_write;
2180
2181         if (!(ctx->options & E2F_OPT_READONLY)) {
2182                 e2fsck_write_bitmaps(ctx);
2183                 if (fs->flags & EXT2_FLAG_DIRTY) {
2184                         pctx.errcode = ext2fs_flush(ctx->fs);
2185                         if (pctx.errcode)
2186                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2187                 }
2188                 pctx.errcode = io_channel_flush(ctx->fs->io);
2189                 if (pctx.errcode)
2190                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2191         }
2192
2193         if (was_changed) {
2194                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2195
2196                 if (fs_fixed)
2197                         exit_value |= FSCK_NONDESTRUCT;
2198                 if (!(ctx->options & E2F_OPT_PREEN)) {
2199 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2200                         log_out(ctx, fs_fixed ?
2201                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2202                                   "CORRECTED *****\n") :
2203                                 _("%s: File system was modified.\n"),
2204                                 ctx->device_name);
2205 #else
2206                         log_out(ctx,
2207                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2208                                 ctx->device_name);
2209 #endif
2210                 }
2211                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2212                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2213                                 ctx->device_name);
2214                         exit_value |= FSCK_REBOOT;
2215                 }
2216         }
2217
2218 skip_write:
2219         if (!ext2fs_test_valid(fs) ||
2220             ((exit_value & FSCK_CANCELED) &&
2221              (sb->s_state & EXT2_ERROR_FS))) {
2222                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2223                                "errors **********\n\n"), ctx->device_name);
2224                 exit_value |= FSCK_UNCORRECTED;
2225                 exit_value &= ~FSCK_NONDESTRUCT;
2226         }
2227         if (exit_value & FSCK_CANCELED) {
2228                 int     allow_cancellation;
2229
2230                 profile_get_boolean(ctx->profile, "options",
2231                                     "allow_cancellation", 0, 0,
2232                                     &allow_cancellation);
2233                 exit_value &= ~FSCK_NONDESTRUCT;
2234                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2235                     (sb->s_state & EXT2_VALID_FS) &&
2236                     !(sb->s_state & EXT2_ERROR_FS))
2237                         exit_value = 0;
2238         } else
2239                 show_stats(ctx);
2240
2241         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2242
2243         ext2fs_close_free(&ctx->fs);
2244         free(ctx->journal_name);
2245
2246         if (ctx->logf)
2247                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2248         e2fsck_free_context(ctx);
2249         remove_error_table(&et_ext2_error_table);
2250         remove_error_table(&et_prof_error_table);
2251         return exit_value;
2252 }