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_MNTENT_H
  37 #include <mntent.h>
  38 #endif
  39 #ifdef HAVE_SYS_IOCTL_H
  40 #include <sys/ioctl.h>
  41 #endif
  42 #ifdef HAVE_MALLOC_H
  43 #include <malloc.h>
  44 #endif
  45 #ifdef HAVE_SYS_TYPES_H
  46 #include <sys/types.h>
  47 #endif
  48 #ifdef HAVE_DIRENT_H
  49 #include <dirent.h>
  50 #endif
  51
  52 #include "e2p/e2p.h"
  53 #include "et/com_err.h"
  54 #include "e2p/e2p.h"
  55 #include "e2fsck.h"
  56 #include "problem.h"
  57 #include "../version.h"
  58
  59 /* Command line options */
  60 static int cflag;               /* check disk */
  61 static int show_version_only;
  62 static int verbose;
  63
  64 static int replace_bad_blocks;
  65 static int keep_bad_blocks;
  66 static char *bad_blocks_file;
  67
  68 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  69
  70 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jfs-debug */
  71 int journal_enable_debug = -1;
  72 #endif
  73
  74 static void usage(e2fsck_t ctx)
  75 {
  76         fprintf(stderr,
  77                 _("Usage: %s [-panyrcdfvtDFV] [-b superblock] [-B blocksize]\n"
  78                 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
  79                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  80                 "\t\t[-E extended-options] device\n"),
  81                 ctx->program_name);
  82
  83         fprintf(stderr, _("\nEmergency help:\n"
  84                 " -p                   Automatic repair (no questions)\n"
  85                 " -n                   Make no changes to the filesystem\n"
  86                 " -y                   Assume \"yes\" to all questions\n"
  87                 " -c                   Check for bad blocks and add them to the badblock list\n"
  88                 " -f                   Force checking even if filesystem is marked clean\n"));
  89         fprintf(stderr, _(""
  90                 " -v                   Be verbose\n"
  91                 " -b superblock        Use alternative superblock\n"
  92                 " -B blocksize         Force blocksize when looking for superblock\n"
  93                 " -j external_journal  Set location of the external journal\n"
  94                 " -l bad_blocks_file   Add to badblocks list\n"
  95                 " -L bad_blocks_file   Set badblocks list\n"
  96                 ));
  97
  98         exit(FSCK_USAGE);
  99 }
 100
 101 static void show_stats(e2fsck_t ctx)
 102 {
 103         ext2_filsys fs = ctx->fs;
 104         ext2_ino_t inodes, inodes_used;
 105         blk64_t blocks, blocks_used;
 106         unsigned int dir_links;
 107         unsigned int num_files, num_links;
 108         int frag_percent_file, frag_percent_dir, frag_percent_total;
 109         int i, j;
 110
 111         dir_links = 2 * ctx->fs_directory_count - 1;
 112         num_files = ctx->fs_total_count - dir_links;
 113         num_links = ctx->fs_links_count - dir_links;
 114         inodes = fs->super->s_inodes_count;
 115         inodes_used = (fs->super->s_inodes_count -
 116                        fs->super->s_free_inodes_count);
 117         blocks = ext2fs_blocks_count(fs->super);
 118         blocks_used = (ext2fs_blocks_count(fs->super) -
 119                        ext2fs_free_blocks_count(fs->super));
 120
 121         frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 122         frag_percent_file = (frag_percent_file + 5) / 10;
 123
 124         frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 125         frag_percent_dir = (frag_percent_dir + 5) / 10;
 126
 127         frag_percent_total = ((10000 * (ctx->fs_fragmented +
 128                                         ctx->fs_fragmented_dir))
 129                               / inodes_used);
 130         frag_percent_total = (frag_percent_total + 5) / 10;
 131
 132         if (!verbose) {
 133                 printf(_("%s: %u/%u files (%0d.%d%% non-contiguous), %llu/%llu blocks\n"),
 134                        ctx->device_name, inodes_used, inodes,
 135                        frag_percent_total / 10, frag_percent_total % 10,
 136                        blocks_used, blocks);
 137                 return;
 138         }
 139         printf (P_("\n%8u inode used (%2.2f%%)\n", "\n%8u inodes used (%2.2f%%)\n",
 140                    inodes_used), inodes_used, 100.0 * inodes_used / inodes);
 141         printf (P_("%8u non-contiguous file (%0d.%d%%)\n",
 142                    "%8u non-contiguous files (%0d.%d%%)\n",
 143                    ctx->fs_fragmented),
 144                 ctx->fs_fragmented, frag_percent_file / 10,
 145                 frag_percent_file % 10);
 146         printf (P_("%8u non-contiguous directory (%0d.%d%%)\n",
 147                    "%8u non-contiguous directories (%0d.%d%%)\n",
 148                    ctx->fs_fragmented_dir),
 149                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 150                 frag_percent_dir % 10);
 151         printf (_("         # of inodes with ind/dind/tind blocks: %u/%u/%u\n"),
 152                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 153
 154         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 155                 if (ctx->extent_depth_count[j])
 156                         break;
 157         if (++j) {
 158                 printf (_("         Extent depth histogram: "));
 159                 for (i=0; i < j; i++) {
 160                         if (i)
 161                                 fputc('/', stdout);
 162                         printf("%u", ctx->extent_depth_count[i]);
 163                 }
 164                 fputc('\n', stdout);
 165         }
 166
 167         printf (P_("%8llu block used (%2.2f%%)\n",
 168                    "%8llu blocks used (%2.2f%%)\n",
 169                    blocks_used), blocks_used, 100.0 * blocks_used / blocks);
 170         printf (P_("%8u bad block\n", "%8u bad blocks\n",
 171                    ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 172         printf (P_("%8u large file\n", "%8u large files\n",
 173                    ctx->large_files), ctx->large_files);
 174         printf (P_("\n%8u regular file\n", "\n%8u regular files\n",
 175                    ctx->fs_regular_count), ctx->fs_regular_count);
 176         printf (P_("%8u directory\n", "%8u directories\n",
 177                    ctx->fs_directory_count), ctx->fs_directory_count);
 178         printf (P_("%8u character device file\n",
 179                    "%8u character device files\n", ctx->fs_chardev_count),
 180                 ctx->fs_chardev_count);
 181         printf (P_("%8u block device file\n", "%8u block device files\n",
 182                    ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 183         printf (P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count),
 184                 ctx->fs_fifo_count);
 185         printf (P_("%8u link\n", "%8u links\n",
 186                    ctx->fs_links_count - dir_links),
 187                 ctx->fs_links_count - dir_links);
 188         printf (P_("%8u symbolic link", "%8u symbolic links",
 189                    ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 190         printf (P_(" (%u fast symbolic link)\n", " (%u fast symbolic links)\n",
 191                    ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
 192         printf (P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count),
 193                 ctx->fs_sockets_count);
 194         printf ("--------\n");
 195         printf (P_("%8u file\n", "%8u files\n",
 196                    ctx->fs_total_count - dir_links),
 197                 ctx->fs_total_count - dir_links);
 198 }
 199
 200 static void check_mount(e2fsck_t ctx)
 201 {
 202         errcode_t       retval;
 203         int             cont;
 204
 205         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 206                                          &ctx->mount_flags);
 207         if (retval) {
 208                 com_err("ext2fs_check_if_mount", retval,
 209                         _("while determining whether %s is mounted."),
 210                         ctx->filesystem_name);
 211                 return;
 212         }
 213
 214         /*
 215          * If the filesystem isn't mounted, or it's the root
 216          * filesystem and it's mounted read-only, and we're not doing
 217          * a read/write check, then everything's fine.
 218          */
 219         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 220             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 221              (ctx->mount_flags & EXT2_MF_READONLY) &&
 222              !(ctx->options & E2F_OPT_WRITECHECK)))
 223                 return;
 224
 225         if ((ctx->options & E2F_OPT_READONLY) &&
 226             !(ctx->options & E2F_OPT_WRITECHECK)) {
 227                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 228                 return;
 229         }
 230
 231         printf(_("%s is mounted.  "), ctx->filesystem_name);
 232         if (!ctx->interactive)
 233                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 234         puts("\007\007\007\007");
 235         printf(_("\n\nWARNING!!!  "
 236                "The filesystem is mounted.   If you continue you ***WILL***\n"
 237                "cause ***SEVERE*** filesystem damage.\n\n"));
 238         puts("\007\007\007");
 239         cont = ask_yn(_("Do you really want to continue"), 0);
 240         if (!cont) {
 241                 printf (_("check aborted.\n"));
 242                 exit (0);
 243         }
 244         return;
 245 }
 246
 247 static int is_on_batt(void)
 248 {
 249         FILE    *f;
 250         DIR     *d;
 251         char    tmp[80], tmp2[80], fname[80];
 252         unsigned int    acflag;
 253         struct dirent*  de;
 254
 255         f = fopen("/proc/apm", "r");
 256         if (f) {
 257                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 258                         acflag = 1;
 259                 fclose(f);
 260                 return (acflag != 1);
 261         }
 262         d = opendir("/proc/acpi/ac_adapter");
 263         if (d) {
 264                 while ((de=readdir(d)) != NULL) {
 265                         if (!strncmp(".", de->d_name, 1))
 266                                 continue;
 267                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 268                                  de->d_name);
 269                         f = fopen(fname, "r");
 270                         if (!f)
 271                                 continue;
 272                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 273                                 tmp[0] = 0;
 274                         fclose(f);
 275                         if (strncmp(tmp, "off-line", 8) == 0) {
 276                                 closedir(d);
 277                                 return 1;
 278                         }
 279                 }
 280                 closedir(d);
 281         }
 282         return 0;
 283 }
 284
 285 /*
 286  * This routine checks to see if a filesystem can be skipped; if so,
 287  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 288  * message explaining why a check is being forced.
 289  */
 290 static void check_if_skip(e2fsck_t ctx)
 291 {
 292         ext2_filsys fs = ctx->fs;
 293         struct problem_context pctx;
 294         const char *reason = NULL;
 295         unsigned int reason_arg = 0;
 296         long next_check;
 297         int batt = is_on_batt();
 298         int defer_check_on_battery;
 299         int broken_system_clock;
 300         time_t lastcheck;
 301
 302         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 303                             0, 0, &broken_system_clock);
 304         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 305                 broken_system_clock = 1;
 306         profile_get_boolean(ctx->profile, "options",
 307                             "defer_check_on_battery", 0, 1,
 308                             &defer_check_on_battery);
 309         if (!defer_check_on_battery)
 310                 batt = 0;
 311
 312         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 313                 return;
 314
 315         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 316                 goto skip;
 317
 318         lastcheck = fs->super->s_lastcheck;
 319         if (lastcheck > ctx->now)
 320                 lastcheck -= ctx->time_fudge;
 321         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 322             !ext2fs_test_valid(fs))
 323                 reason = _(" contains a file system with errors");
 324         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 325                 reason = _(" was not cleanly unmounted");
 326         else if (check_backup_super_block(ctx))
 327                 reason = _(" primary superblock features different from backup");
 328         else if ((fs->super->s_max_mnt_count > 0) &&
 329                  (fs->super->s_mnt_count >=
 330                   (unsigned) fs->super->s_max_mnt_count)) {
 331                 reason = _(" has been mounted %u times without being checked");
 332                 reason_arg = fs->super->s_mnt_count;
 333                 if (batt && (fs->super->s_mnt_count <
 334                              (unsigned) fs->super->s_max_mnt_count*2))
 335                         reason = 0;
 336         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 337                    (ctx->now < lastcheck)) {
 338                 reason = _(" has filesystem last checked time in the future");
 339                 if (batt)
 340                         reason = 0;
 341         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 342                    ((ctx->now - lastcheck) >=
 343                     ((time_t) fs->super->s_checkinterval))) {
 344                 reason = _(" has gone %u days without being checked");
 345                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 346                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 347                              fs->super->s_checkinterval*2))
 348                         reason = 0;
 349         }
 350         if (reason) {
 351                 fputs(ctx->device_name, stdout);
 352                 printf(reason, reason_arg);
 353                 fputs(_(", check forced.\n"), stdout);
 354                 return;
 355         }
 356
 357         /*
 358          * Update the global counts from the block group counts.  This
 359          * is needed since modern kernels don't update the global
 360          * counts so as to avoid locking the entire file system.  So
 361          * if the filesystem is not unmounted cleanly, the global
 362          * counts may not be accurate.  Update them here if we can,
 363          * for the benefit of users who might examine the file system
 364          * using dumpe2fs.  (This is for cosmetic reasons only.)
 365          */
 366         clear_problem_context(&pctx);
 367         pctx.ino = fs->super->s_free_inodes_count;
 368         pctx.ino2 = ctx->free_inodes;
 369         if ((pctx.ino != pctx.ino2) &&
 370             !(ctx->options & E2F_OPT_READONLY) &&
 371             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 372                 fs->super->s_free_inodes_count = ctx->free_inodes;
 373                 ext2fs_mark_super_dirty(fs);
 374         }
 375         clear_problem_context(&pctx);
 376         pctx.blk = ext2fs_free_blocks_count(fs->super);
 377         pctx.blk2 = ctx->free_blocks;
 378         if ((pctx.blk != pctx.blk2) &&
 379             !(ctx->options & E2F_OPT_READONLY) &&
 380             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 381                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 382                 ext2fs_mark_super_dirty(fs);
 383         }
 384
 385         /* Print the summary message when we're skipping a full check */
 386         printf(_("%s: clean, %u/%u files, %llu/%llu blocks"), ctx->device_name,
 387                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 388                fs->super->s_inodes_count,
 389                ext2fs_blocks_count(fs->super) -
 390                ext2fs_free_blocks_count(fs->super),
 391                ext2fs_blocks_count(fs->super));
 392         next_check = 100000;
 393         if (fs->super->s_max_mnt_count > 0) {
 394                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 395                 if (next_check <= 0)
 396                         next_check = 1;
 397         }
 398         if (!broken_system_clock && fs->super->s_checkinterval &&
 399             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 400                 next_check = 1;
 401         if (next_check <= 5) {
 402                 if (next_check == 1) {
 403                         if (batt)
 404                                 fputs(_(" (check deferred; on battery)"),
 405                                       stdout);
 406                         else
 407                                 fputs(_(" (check after next mount)"), stdout);
 408                 } else
 409                         printf(_(" (check in %ld mounts)"), next_check);
 410         }
 411         fputc('\n', stdout);
 412 skip:
 413         ext2fs_close(fs);
 414         ctx->fs = NULL;
 415         e2fsck_free_context(ctx);
 416         exit(FSCK_OK);
 417 }
 418
 419 /*
 420  * For completion notice
 421  */
 422 struct percent_tbl {
 423         int     max_pass;
 424         int     table[32];
 425 };
 426 struct percent_tbl e2fsck_tbl = {
 427         5, { 0, 70, 90, 92,  95, 100 }
 428 };
 429 static char bar[128], spaces[128];
 430
 431 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 432                           int max)
 433 {
 434         float   percent;
 435
 436         if (pass <= 0)
 437                 return 0.0;
 438         if (pass > tbl->max_pass || max == 0)
 439                 return 100.0;
 440         percent = ((float) curr) / ((float) max);
 441         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 442                 + tbl->table[pass-1]);
 443 }
 444
 445 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 446 {
 447         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 448                 return;
 449
 450         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 451                ctx->stop_meta);
 452         fflush(stdout);
 453         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 454 }
 455
 456 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 457                            unsigned int dpynum)
 458 {
 459         static const char spinner[] = "\\|/-";
 460         int     i;
 461         unsigned int    tick;
 462         struct timeval  tv;
 463         int dpywidth;
 464         int fixed_percent;
 465
 466         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 467                 return 0;
 468
 469         /*
 470          * Calculate the new progress position.  If the
 471          * percentage hasn't changed, then we skip out right
 472          * away.
 473          */
 474         fixed_percent = (int) ((10 * percent) + 0.5);
 475         if (ctx->progress_last_percent == fixed_percent)
 476                 return 0;
 477         ctx->progress_last_percent = fixed_percent;
 478
 479         /*
 480          * If we've already updated the spinner once within
 481          * the last 1/8th of a second, no point doing it
 482          * again.
 483          */
 484         gettimeofday(&tv, NULL);
 485         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 486         if ((tick == ctx->progress_last_time) &&
 487             (fixed_percent != 0) && (fixed_percent != 1000))
 488                 return 0;
 489         ctx->progress_last_time = tick;
 490
 491         /*
 492          * Advance the spinner, and note that the progress bar
 493          * will be on the screen
 494          */
 495         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 496         ctx->flags |= E2F_FLAG_PROG_BAR;
 497
 498         dpywidth = 66 - strlen(label);
 499         dpywidth = 8 * (dpywidth / 8);
 500         if (dpynum)
 501                 dpywidth -= 8;
 502
 503         i = ((percent * dpywidth) + 50) / 100;
 504         printf("%s%s: |%s%s", ctx->start_meta, label,
 505                bar + (sizeof(bar) - (i+1)),
 506                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 507         if (fixed_percent == 1000)
 508                 fputc('|', stdout);
 509         else
 510                 fputc(spinner[ctx->progress_pos & 3], stdout);
 511         printf(" %4.1f%%  ", percent);
 512         if (dpynum)
 513                 printf("%u\r", dpynum);
 514         else
 515                 fputs(" \r", stdout);
 516         fputs(ctx->stop_meta, stdout);
 517
 518         if (fixed_percent == 1000)
 519                 e2fsck_clear_progbar(ctx);
 520         fflush(stdout);
 521
 522         return 0;
 523 }
 524
 525 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 526                                   unsigned long cur, unsigned long max)
 527 {
 528         char buf[1024];
 529         float percent;
 530
 531         if (pass == 0)
 532                 return 0;
 533
 534         if (ctx->progress_fd) {
 535                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 536                          pass, cur, max, ctx->device_name);
 537                 write_all(ctx->progress_fd, buf, strlen(buf));
 538         } else {
 539                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 540                 e2fsck_simple_progress(ctx, ctx->device_name,
 541                                        percent, 0);
 542         }
 543         return 0;
 544 }
 545
 546 #define PATH_SET "PATH=/sbin"
 547
 548 /*
 549  * Make sure 0,1,2 file descriptors are open, so that we don't open
 550  * the filesystem using the same file descriptor as stdout or stderr.
 551  */
 552 static void reserve_stdio_fds(void)
 553 {
 554         int     fd = 0;
 555
 556         while (fd <= 2) {
 557                 fd = open("/dev/null", O_RDWR);
 558                 if (fd < 0) {
 559                         fprintf(stderr, _("ERROR: Couldn't open "
 560                                 "/dev/null (%s)\n"),
 561                                 strerror(errno));
 562                         break;
 563                 }
 564         }
 565 }
 566
 567 #ifdef HAVE_SIGNAL_H
 568 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 569 {
 570         e2fsck_t ctx = e2fsck_global_ctx;
 571
 572         if (!ctx)
 573                 return;
 574
 575         ctx->progress = e2fsck_update_progress;
 576 }
 577
 578 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 579 {
 580         e2fsck_t ctx = e2fsck_global_ctx;
 581
 582         if (!ctx)
 583                 return;
 584
 585         e2fsck_clear_progbar(ctx);
 586         ctx->progress = 0;
 587 }
 588
 589 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 590 {
 591         e2fsck_t ctx = e2fsck_global_ctx;
 592
 593         if (!ctx)
 594                 exit(FSCK_CANCELED);
 595
 596         ctx->flags |= E2F_FLAG_CANCEL;
 597 }
 598 #endif
 599
 600 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 601 {
 602         char    *buf, *token, *next, *p, *arg;
 603         int     ea_ver;
 604         int     extended_usage = 0;
 605
 606         buf = string_copy(ctx, opts, 0);
 607         for (token = buf; token && *token; token = next) {
 608                 p = strchr(token, ',');
 609                 next = 0;
 610                 if (p) {
 611                         *p = 0;
 612                         next = p+1;
 613                 }
 614                 arg = strchr(token, '=');
 615                 if (arg) {
 616                         *arg = 0;
 617                         arg++;
 618                 }
 619                 if (strcmp(token, "ea_ver") == 0) {
 620                         if (!arg) {
 621                                 extended_usage++;
 622                                 continue;
 623                         }
 624                         ea_ver = strtoul(arg, &p, 0);
 625                         if (*p ||
 626                             ((ea_ver != 1) && (ea_ver != 2))) {
 627                                 fprintf(stderr,
 628                                         _("Invalid EA version.\n"));
 629                                 extended_usage++;
 630                                 continue;
 631                         }
 632                         ctx->ext_attr_ver = ea_ver;
 633                 } else if (strcmp(token, "fragcheck") == 0) {
 634                         ctx->options |= E2F_OPT_FRAGCHECK;
 635                         continue;
 636                 } else if (strcmp(token, "journal_only") == 0) {
 637                         if (arg) {
 638                                 extended_usage++;
 639                                 continue;
 640                         }
 641                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 642                 } else if (strcmp(token, "discard") == 0) {
 643                         ctx->options |= E2F_OPT_DISCARD;
 644                         continue;
 645                 } else if (strcmp(token, "nodiscard") == 0) {
 646                         ctx->options &= ~E2F_OPT_DISCARD;
 647                         continue;
 648                 } else {
 649                         fprintf(stderr, _("Unknown extended option: %s\n"),
 650                                 token);
 651                         extended_usage++;
 652                 }
 653         }
 654         free(buf);
 655
 656         if (extended_usage) {
 657                 fputs(("\nExtended options are separated by commas, "
 658                        "and may take an argument which\n"
 659                        "is set off by an equals ('=') sign.  "
 660                        "Valid extended options are:\n"), stderr);
 661                 fputs(("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 662                 fputs(("\tfragcheck\n"), stderr);
 663                 fputs(("\tjournal_only\n"), stderr);
 664                 fputs(("\tdiscard\n"), stderr);
 665                 fputs(("\tnodiscard\n"), stderr);
 666                 fputc('\n', stderr);
 667                 exit(1);
 668         }
 669 }
 670
 671 static void syntax_err_report(const char *filename, long err, int line_num)
 672 {
 673         fprintf(stderr,
 674                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 675                 filename, line_num, error_message(err));
 676         exit(FSCK_ERROR);
 677 }
 678
 679 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 680
 681 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 682 {
 683         int             flush = 0;
 684         int             c, fd;
 685 #ifdef MTRACE
 686         extern void     *mallwatch;
 687 #endif
 688         e2fsck_t        ctx;
 689         errcode_t       retval;
 690 #ifdef HAVE_SIGNAL_H
 691         struct sigaction        sa;
 692 #endif
 693         char            *extended_opts = 0;
 694         char            *cp;
 695         int             res;            /* result of sscanf */
 696 #ifdef CONFIG_JBD_DEBUG
 697         char            *jbd_debug;
 698 #endif
 699
 700         retval = e2fsck_allocate_context(&ctx);
 701         if (retval)
 702                 return retval;
 703
 704         *ret_ctx = ctx;
 705
 706         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 707         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 708         if (isatty(0) && isatty(1)) {
 709                 ctx->interactive = 1;
 710         } else {
 711                 ctx->start_meta[0] = '\001';
 712                 ctx->stop_meta[0] = '\002';
 713         }
 714         memset(bar, '=', sizeof(bar)-1);
 715         memset(spaces, ' ', sizeof(spaces)-1);
 716         add_error_table(&et_ext2_error_table);
 717         add_error_table(&et_prof_error_table);
 718         blkid_get_cache(&ctx->blkid, NULL);
 719
 720         if (argc && *argv)
 721                 ctx->program_name = *argv;
 722         else
 723                 ctx->program_name = "e2fsck";
 724
 725         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 726                 switch (c) {
 727                 case 'C':
 728                         ctx->progress = e2fsck_update_progress;
 729                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 730                         if (res != 1)
 731                                 goto sscanf_err;
 732
 733                         if (ctx->progress_fd < 0) {
 734                                 ctx->progress = 0;
 735                                 ctx->progress_fd = ctx->progress_fd * -1;
 736                         }
 737                         if (!ctx->progress_fd)
 738                                 break;
 739                         /* Validate the file descriptor to avoid disasters */
 740                         fd = dup(ctx->progress_fd);
 741                         if (fd < 0) {
 742                                 fprintf(stderr,
 743                                 _("Error validating file descriptor %d: %s\n"),
 744                                         ctx->progress_fd,
 745                                         error_message(errno));
 746                                 fatal_error(ctx,
 747                         _("Invalid completion information file descriptor"));
 748                         } else
 749                                 close(fd);
 750                         break;
 751                 case 'D':
 752                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 753                         break;
 754                 case 'E':
 755                         extended_opts = optarg;
 756                         break;
 757                 case 'p':
 758                 case 'a':
 759                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 760                         conflict_opt:
 761                                 fatal_error(ctx,
 762         _("Only one of the options -p/-a, -n or -y may be specified."));
 763                         }
 764                         ctx->options |= E2F_OPT_PREEN;
 765                         break;
 766                 case 'n':
 767                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 768                                 goto conflict_opt;
 769                         ctx->options |= E2F_OPT_NO;
 770                         break;
 771                 case 'y':
 772                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 773                                 goto conflict_opt;
 774                         ctx->options |= E2F_OPT_YES;
 775                         break;
 776                 case 't':
 777 #ifdef RESOURCE_TRACK
 778                         if (ctx->options & E2F_OPT_TIME)
 779                                 ctx->options |= E2F_OPT_TIME2;
 780                         else
 781                                 ctx->options |= E2F_OPT_TIME;
 782 #else
 783                         fprintf(stderr, _("The -t option is not "
 784                                 "supported on this version of e2fsck.\n"));
 785 #endif
 786                         break;
 787                 case 'c':
 788                         if (cflag++)
 789                                 ctx->options |= E2F_OPT_WRITECHECK;
 790                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 791                         break;
 792                 case 'r':
 793                         /* What we do by default, anyway! */
 794                         break;
 795                 case 'b':
 796                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
 797                         if (res != 1)
 798                                 goto sscanf_err;
 799                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 800                         break;
 801                 case 'B':
 802                         ctx->blocksize = atoi(optarg);
 803                         break;
 804                 case 'I':
 805                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 806                         if (res != 1)
 807                                 goto sscanf_err;
 808                         break;
 809                 case 'j':
 810                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 811                                                               optarg, NULL);
 812                         if (!ctx->journal_name) {
 813                                 com_err(ctx->program_name, 0,
 814                                         _("Unable to resolve '%s'"),
 815                                         optarg);
 816                                 fatal_error(ctx, 0);
 817                         }
 818                         break;
 819                 case 'P':
 820                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 821                         if (res != 1)
 822                                 goto sscanf_err;
 823                         break;
 824                 case 'L':
 825                         replace_bad_blocks++;
 826                 case 'l':
 827                         bad_blocks_file = string_copy(ctx, optarg, 0);
 828                         break;
 829                 case 'd':
 830                         ctx->options |= E2F_OPT_DEBUG;
 831                         break;
 832                 case 'f':
 833                         ctx->options |= E2F_OPT_FORCE;
 834                         break;
 835                 case 'F':
 836                         flush = 1;
 837                         break;
 838                 case 'v':
 839                         verbose = 1;
 840                         break;
 841                 case 'V':
 842                         show_version_only = 1;
 843                         break;
 844 #ifdef MTRACE
 845                 case 'M':
 846                         mallwatch = (void *) strtol(optarg, NULL, 0);
 847                         break;
 848 #endif
 849                 case 'N':
 850                         ctx->device_name = string_copy(ctx, optarg, 0);
 851                         break;
 852                 case 'k':
 853                         keep_bad_blocks++;
 854                         break;
 855                 default:
 856                         usage(ctx);
 857                 }
 858         if (show_version_only)
 859                 return 0;
 860         if (optind != argc - 1)
 861                 usage(ctx);
 862         if ((ctx->options & E2F_OPT_NO) &&
 863             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
 864                 com_err(ctx->program_name, 0,
 865                         _("The -n and -D options are incompatible."));
 866                 fatal_error(ctx, 0);
 867         }
 868         if ((ctx->options & E2F_OPT_NO) && cflag) {
 869                 com_err(ctx->program_name, 0,
 870                         _("The -n and -c options are incompatible."));
 871                 fatal_error(ctx, 0);
 872         }
 873         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
 874                 com_err(ctx->program_name, 0,
 875                         _("The -n and -l/-L options are incompatible."));
 876                 fatal_error(ctx, 0);
 877         }
 878         if (ctx->options & E2F_OPT_NO)
 879                 ctx->options |= E2F_OPT_READONLY;
 880
 881         ctx->io_options = strchr(argv[optind], '?');
 882         if (ctx->io_options)
 883                 *ctx->io_options++ = 0;
 884         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 885         if (!ctx->filesystem_name) {
 886                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 887                         argv[optind]);
 888                 fatal_error(ctx, 0);
 889         }
 890         if (extended_opts)
 891                 parse_extended_opts(ctx, extended_opts);
 892
 893         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 894                 config_fn[0] = cp;
 895         profile_set_syntax_err_cb(syntax_err_report);
 896         profile_init(config_fn, &ctx->profile);
 897
 898         if (flush) {
 899                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 900                 if (fd < 0) {
 901                         com_err("open", errno,
 902                                 _("while opening %s for flushing"),
 903                                 ctx->filesystem_name);
 904                         fatal_error(ctx, 0);
 905                 }
 906                 if ((retval = ext2fs_sync_device(fd, 1))) {
 907                         com_err("ext2fs_sync_device", retval,
 908                                 _("while trying to flush %s"),
 909                                 ctx->filesystem_name);
 910                         fatal_error(ctx, 0);
 911                 }
 912                 close(fd);
 913         }
 914         if (cflag && bad_blocks_file) {
 915                 fprintf(stderr, _("The -c and the -l/-L options may "
 916                                   "not be both used at the same time.\n"));
 917                 exit(FSCK_USAGE);
 918         }
 919 #ifdef HAVE_SIGNAL_H
 920         /*
 921          * Set up signal action
 922          */
 923         memset(&sa, 0, sizeof(struct sigaction));
 924         sa.sa_handler = signal_cancel;
 925         sigaction(SIGINT, &sa, 0);
 926         sigaction(SIGTERM, &sa, 0);
 927 #ifdef SA_RESTART
 928         sa.sa_flags = SA_RESTART;
 929 #endif
 930         e2fsck_global_ctx = ctx;
 931         sa.sa_handler = signal_progress_on;
 932         sigaction(SIGUSR1, &sa, 0);
 933         sa.sa_handler = signal_progress_off;
 934         sigaction(SIGUSR2, &sa, 0);
 935 #endif
 936
 937         /* Update our PATH to include /sbin if we need to run badblocks  */
 938         if (cflag) {
 939                 char *oldpath = getenv("PATH");
 940                 char *newpath;
 941                 int len = sizeof(PATH_SET) + 1;
 942
 943                 if (oldpath)
 944                         len += strlen(oldpath);
 945
 946                 newpath = malloc(len);
 947                 if (!newpath)
 948                         fatal_error(ctx, "Couldn't malloc() newpath");
 949                 strcpy(newpath, PATH_SET);
 950
 951                 if (oldpath) {
 952                         strcat(newpath, ":");
 953                         strcat(newpath, oldpath);
 954                 }
 955                 putenv(newpath);
 956         }
 957 #ifdef CONFIG_JBD_DEBUG
 958         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
 959         if (jbd_debug) {
 960                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
 961                 if (res != 1) {
 962                         fprintf(stderr,
 963                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
 964                                 jbd_debug);
 965                         exit (1);
 966                 }
 967         }
 968 #endif
 969         return 0;
 970
 971 sscanf_err:
 972         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
 973                 c, optarg);
 974         exit (1);
 975 }
 976
 977 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
 978                              ext2_filsys *ret_fs)
 979 {
 980         errcode_t retval;
 981
 982         *ret_fs = NULL;
 983         if (ctx->superblock && ctx->blocksize) {
 984                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 985                                       flags, ctx->superblock, ctx->blocksize,
 986                                       io_ptr, ret_fs);
 987         } else if (ctx->superblock) {
 988                 int blocksize;
 989                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 990                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 991                         if (*ret_fs) {
 992                                 ext2fs_free(*ret_fs);
 993                                 *ret_fs = NULL;
 994                         }
 995                         retval = ext2fs_open2(ctx->filesystem_name,
 996                                               ctx->io_options, flags,
 997                                               ctx->superblock, blocksize,
 998                                               io_ptr, ret_fs);
 999                         if (!retval)
1000                                 break;
1001                 }
1002         } else
1003                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1004                                       flags, 0, 0, io_ptr, ret_fs);
1005         return retval;
1006 }
1007
1008 static const char *my_ver_string = E2FSPROGS_VERSION;
1009 static const char *my_ver_date = E2FSPROGS_DATE;
1010
1011 int e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1012 {
1013         struct mmp_struct *mmp_s;
1014         unsigned int mmp_check_interval;
1015         errcode_t retval = 0;
1016         struct problem_context pctx;
1017         unsigned int wait_time = 0;
1018
1019         clear_problem_context(&pctx);
1020         if (fs->mmp_buf == NULL) {
1021                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1022                 if (retval)
1023                         goto check_error;
1024         }
1025
1026         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1027         if (retval)
1028                 goto check_error;
1029
1030         mmp_s = fs->mmp_buf;
1031
1032         mmp_check_interval = fs->super->s_mmp_update_interval;
1033         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1034                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1035
1036         /*
1037          * If check_interval in MMP block is larger, use that instead of
1038          * check_interval from the superblock.
1039          */
1040         if (mmp_s->mmp_check_interval > mmp_check_interval)
1041                 mmp_check_interval = mmp_s->mmp_check_interval;
1042
1043         wait_time = mmp_check_interval * 2 + 1;
1044
1045         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1046                 retval = 0;
1047         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1048                 retval = EXT2_ET_MMP_FSCK_ON;
1049         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1050                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1051
1052         if (retval)
1053                 goto check_error;
1054
1055         /* Print warning if e2fck will wait for more than 20 secs. */
1056         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1057                 printf("MMP interval is %u seconds and total wait time is %u "
1058                        "seconds. Please wait...\n",
1059                         mmp_check_interval, wait_time * 2);
1060         }
1061
1062         return 0;
1063
1064 check_error:
1065
1066         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1067                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1068                         fs->super->s_mmp_block = 0;
1069                         ext2fs_mark_super_dirty(fs);
1070                         retval = 0;
1071                 }
1072         } else if (retval == EXT2_ET_MMP_FAILED) {
1073                 com_err(ctx->program_name, retval,
1074                         _("while checking MMP block"));
1075                 dump_mmp_msg(fs->mmp_buf, NULL);
1076         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1077                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1078                 com_err(ctx->program_name, retval,
1079                         _("while checking MMP block"));
1080                 dump_mmp_msg(fs->mmp_buf,
1081                              _("If you are sure the filesystem is not "
1082                                "in use on any node, run:\n"
1083                                "'tune2fs -f -E clear_mmp {device}'\n"));
1084         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1085                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1086                         ext2fs_mmp_clear(fs);
1087                         retval = 0;
1088                 }
1089         }
1090         return retval;
1091 }
1092
1093 int main (int argc, char *argv[])
1094 {
1095         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1096         int             exit_value = FSCK_OK;
1097         ext2_filsys     fs = 0;
1098         io_manager      io_ptr;
1099         struct ext2_super_block *sb;
1100         const char      *lib_ver_date;
1101         int             my_ver, lib_ver;
1102         e2fsck_t        ctx;
1103         blk_t           orig_superblock;
1104         struct problem_context pctx;
1105         int flags, run_result;
1106         int journal_size;
1107         int sysval, sys_page_size = 4096;
1108         int old_bitmaps;
1109         __u32 features[3];
1110         char *cp;
1111
1112         clear_problem_context(&pctx);
1113         sigcatcher_setup();
1114 #ifdef MTRACE
1115         mtrace();
1116 #endif
1117 #ifdef MCHECK
1118         mcheck(0);
1119 #endif
1120 #ifdef ENABLE_NLS
1121         setlocale(LC_MESSAGES, "");
1122         setlocale(LC_CTYPE, "");
1123         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1124         textdomain(NLS_CAT_NAME);
1125         set_com_err_gettext(gettext);
1126 #endif
1127         my_ver = ext2fs_parse_version_string(my_ver_string);
1128         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1129         if (my_ver > lib_ver) {
1130                 fprintf( stderr, _("Error: ext2fs library version "
1131                         "out of date!\n"));
1132                 show_version_only++;
1133         }
1134
1135         retval = PRS(argc, argv, &ctx);
1136         if (retval) {
1137                 com_err("e2fsck", retval,
1138                         _("while trying to initialize program"));
1139                 exit(FSCK_ERROR);
1140         }
1141         reserve_stdio_fds();
1142
1143         init_resource_track(&ctx->global_rtrack, NULL);
1144         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1145                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
1146                          my_ver_date);
1147
1148         if (show_version_only) {
1149                 fprintf(stderr, _("\tUsing %s, %s\n"),
1150                         error_message(EXT2_ET_BASE), lib_ver_date);
1151                 exit(FSCK_OK);
1152         }
1153
1154         check_mount(ctx);
1155
1156         if (!(ctx->options & E2F_OPT_PREEN) &&
1157             !(ctx->options & E2F_OPT_NO) &&
1158             !(ctx->options & E2F_OPT_YES)) {
1159                 if (!ctx->interactive)
1160                         fatal_error(ctx,
1161                                     _("need terminal for interactive repairs"));
1162         }
1163         ctx->superblock = ctx->use_superblock;
1164
1165         flags = EXT2_FLAG_SKIP_MMP;
1166 restart:
1167 #ifdef CONFIG_TESTIO_DEBUG
1168         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1169                 io_ptr = test_io_manager;
1170                 test_io_backing_manager = unix_io_manager;
1171         } else
1172 #endif
1173                 io_ptr = unix_io_manager;
1174         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1175         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1176                             &old_bitmaps);
1177         if (!old_bitmaps)
1178                 flags |= EXT2_FLAG_64BITS;
1179         if ((ctx->options & E2F_OPT_READONLY) == 0)
1180                 flags |= EXT2_FLAG_RW;
1181         if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
1182                 flags |= EXT2_FLAG_EXCLUSIVE;
1183
1184         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1185
1186         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1187             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1188             ((retval == EXT2_ET_BAD_MAGIC) ||
1189              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1190              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1191                 if (retval2 == ENOMEM) {
1192                         retval = retval2;
1193                         goto failure;
1194                 }
1195                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1196                         ext2fs_free(fs);
1197                         fs = NULL;
1198                 }
1199                 if (!fs || (fs->group_desc_count > 1)) {
1200                         printf(_("%s: %s trying backup blocks...\n"),
1201                                ctx->program_name,
1202                                retval ? _("Superblock invalid,") :
1203                                _("Group descriptors look bad..."));
1204                         orig_superblock = ctx->superblock;
1205                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1206                         if (fs)
1207                                 ext2fs_close(fs);
1208                         orig_retval = retval;
1209                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1210                         if ((orig_retval == 0) && retval != 0) {
1211                                 if (fs)
1212                                         ext2fs_close(fs);
1213                                 com_err(ctx->program_name, retval,
1214                                         "when using the backup blocks");
1215                                 printf(_("%s: going back to original "
1216                                          "superblock\n"), ctx->program_name);
1217                                 ctx->superblock = orig_superblock;
1218                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1219                         }
1220                 }
1221         }
1222         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1223              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1224             fs && fs->super) {
1225                 sb = fs->super;
1226                 features[0] = (sb->s_feature_compat &
1227                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1228                 features[1] = (sb->s_feature_incompat &
1229                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1230                 features[2] = (sb->s_feature_ro_compat &
1231                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1232                 if (features[0] || features[1] || features[2])
1233                         goto print_unsupp_features;
1234         }
1235 failure:
1236         if (retval) {
1237                 if (orig_retval)
1238                         retval = orig_retval;
1239                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1240                         ctx->filesystem_name);
1241                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1242                         printf(_("The filesystem revision is apparently "
1243                                "too high for this version of e2fsck.\n"
1244                                "(Or the filesystem superblock "
1245                                "is corrupt)\n\n"));
1246                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1247                 } else if (retval == EXT2_ET_SHORT_READ)
1248                         printf(_("Could this be a zero-length partition?\n"));
1249                 else if ((retval == EPERM) || (retval == EACCES))
1250                         printf(_("You must have %s access to the "
1251                                "filesystem or be root\n"),
1252                                (ctx->options & E2F_OPT_READONLY) ?
1253                                "r/o" : "r/w");
1254                 else if (retval == ENXIO)
1255                         printf(_("Possibly non-existent or swap device?\n"));
1256                 else if (retval == EBUSY)
1257                         printf(_("Filesystem mounted or opened exclusively "
1258                                  "by another program?\n"));
1259                 else if (retval == ENOENT)
1260                         printf(_("Possibly non-existent device?\n"));
1261 #ifdef EROFS
1262                 else if (retval == EROFS)
1263                         printf(_("Disk write-protected; use the -n option "
1264                                "to do a read-only\n"
1265                                "check of the device.\n"));
1266 #endif
1267                 else
1268                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1269                 fatal_error(ctx, 0);
1270         }
1271         /*
1272          * We only update the master superblock because (a) paranoia;
1273          * we don't want to corrupt the backup superblocks, and (b) we
1274          * don't need to update the mount count and last checked
1275          * fields in the backup superblock (the kernel doesn't update
1276          * the backup superblocks anyway).  With newer versions of the
1277          * library this flag is set by ext2fs_open2(), but we set this
1278          * here just to be sure.  (No, we don't support e2fsck running
1279          * with some other libext2fs than the one that it was shipped
1280          * with, but just in case....)
1281          */
1282         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1283
1284         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1285                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1286                 int need_restart = 0;
1287
1288                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1289                                                        blocksize,
1290                                                        &ctx->num_blocks);
1291                 /*
1292                  * The floppy driver refuses to allow anyone else to
1293                  * open the device if has been opened with O_EXCL;
1294                  * this is unlike other block device drivers in Linux.
1295                  * To handle this, we close the filesystem and then
1296                  * reopen the filesystem after we get the device size.
1297                  */
1298                 if (pctx.errcode == EBUSY) {
1299                         ext2fs_close(fs);
1300                         need_restart++;
1301                         pctx.errcode =
1302                                 ext2fs_get_device_size2(ctx->filesystem_name,
1303                                                         blocksize,
1304                                                         &ctx->num_blocks);
1305                 }
1306                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1307                         ctx->num_blocks = 0;
1308                 else if (pctx.errcode) {
1309                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1310                         ctx->flags |= E2F_FLAG_ABORT;
1311                         fatal_error(ctx, 0);
1312                 }
1313                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1314                 if (need_restart)
1315                         goto restart;
1316         }
1317
1318         ctx->fs = fs;
1319         fs->priv_data = ctx;
1320         fs->now = ctx->now;
1321         sb = fs->super;
1322         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1323                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1324                         _("while trying to open %s"),
1325                         ctx->filesystem_name);
1326         get_newer:
1327                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1328         }
1329
1330         /*
1331          * Set the device name, which is used whenever we print error
1332          * or informational messages to the user.
1333          */
1334         if (ctx->device_name == 0 &&
1335             (sb->s_volume_name[0] != 0)) {
1336                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1337                                                sizeof(sb->s_volume_name));
1338         }
1339         if (ctx->device_name == 0)
1340                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1341         for (cp = ctx->device_name; *cp; cp++)
1342                 if (isspace(*cp) || *cp == ':')
1343                         *cp = '_';
1344
1345         ehandler_init(fs->io);
1346
1347         if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
1348             (flags & EXT2_FLAG_SKIP_MMP)) {
1349                 if (e2fsck_check_mmp(fs, ctx))
1350                         fatal_error(ctx, 0);
1351         }
1352
1353          /*
1354           * Restart in order to reopen fs but this time start mmp.
1355           */
1356         if (flags & EXT2_FLAG_SKIP_MMP) {
1357                 ext2fs_close(fs);
1358                 ctx->fs = NULL;
1359                 flags &= ~EXT2_FLAG_SKIP_MMP;
1360                 goto restart;
1361         }
1362
1363         if ((ctx->mount_flags & EXT2_MF_MOUNTED) &&
1364             !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER))
1365                 goto skip_journal;
1366
1367         /*
1368          * Make sure the ext3 superblock fields are consistent.
1369          */
1370         retval = e2fsck_check_ext3_journal(ctx);
1371         if (retval) {
1372                 com_err(ctx->program_name, retval,
1373                         _("while checking ext3 journal for %s"),
1374                         ctx->device_name);
1375                 fatal_error(ctx, 0);
1376         }
1377
1378         /*
1379          * Check to see if we need to do ext3-style recovery.  If so,
1380          * do it, and then restart the fsck.
1381          */
1382         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1383                 if (ctx->options & E2F_OPT_READONLY) {
1384                         printf(_("Warning: skipping journal recovery "
1385                                  "because doing a read-only filesystem "
1386                                  "check.\n"));
1387                         io_channel_flush(ctx->fs->io);
1388                 } else {
1389                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1390                                 /*
1391                                  * Whoops, we attempted to run the
1392                                  * journal twice.  This should never
1393                                  * happen, unless the hardware or
1394                                  * device driver is being bogus.
1395                                  */
1396                                 com_err(ctx->program_name, 0,
1397                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1398                                 fatal_error(ctx, 0);
1399                         }
1400                         retval = e2fsck_run_ext3_journal(ctx);
1401                         if (retval) {
1402                                 com_err(ctx->program_name, retval,
1403                                 _("while recovering ext3 journal of %s"),
1404                                         ctx->device_name);
1405                                 fatal_error(ctx, 0);
1406                         }
1407                         ext2fs_close(ctx->fs);
1408                         ctx->fs = 0;
1409                         ctx->flags |= E2F_FLAG_RESTARTED;
1410                         goto restart;
1411                 }
1412         }
1413
1414 skip_journal:
1415         /*
1416          * Check for compatibility with the feature sets.  We need to
1417          * be more stringent than ext2fs_open().
1418          */
1419         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1420         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1421         features[2] = (sb->s_feature_ro_compat &
1422                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1423 print_unsupp_features:
1424         if (features[0] || features[1] || features[2]) {
1425                 int     i, j;
1426                 __u32   *mask = features, m;
1427
1428                 fprintf(stderr, _("%s has unsupported feature(s):"),
1429                         ctx->filesystem_name);
1430
1431                 for (i=0; i <3; i++,mask++) {
1432                         for (j=0,m=1; j < 32; j++, m<<=1) {
1433                                 if (*mask & m)
1434                                         fprintf(stderr, " %s",
1435                                                 e2p_feature2string(i, m));
1436                         }
1437                 }
1438                 putc('\n', stderr);
1439                 goto get_newer;
1440         }
1441 #ifdef ENABLE_COMPRESSION
1442         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1443                 com_err(ctx->program_name, 0,
1444                         _("Warning: compression support is experimental.\n"));
1445 #endif
1446 #ifndef ENABLE_HTREE
1447         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1448                 com_err(ctx->program_name, 0,
1449                         _("E2fsck not compiled with HTREE support,\n\t"
1450                           "but filesystem %s has HTREE directories.\n"),
1451                         ctx->device_name);
1452                 goto get_newer;
1453         }
1454 #endif
1455
1456         /*
1457          * If the user specified a specific superblock, presumably the
1458          * master superblock has been trashed.  So we mark the
1459          * superblock as dirty, so it can be written out.
1460          */
1461         if (ctx->superblock &&
1462             !(ctx->options & E2F_OPT_READONLY))
1463                 ext2fs_mark_super_dirty(fs);
1464
1465         /*
1466          * Calculate the number of filesystem blocks per pagesize.  If
1467          * fs->blocksize > page_size, set the number of blocks per
1468          * pagesize to 1 to avoid division by zero errors.
1469          */
1470 #ifdef _SC_PAGESIZE
1471         sysval = sysconf(_SC_PAGESIZE);
1472         if (sysval > 0)
1473                 sys_page_size = sysval;
1474 #endif /* _SC_PAGESIZE */
1475         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1476         if (ctx->blocks_per_page == 0)
1477                 ctx->blocks_per_page = 1;
1478
1479         if (ctx->superblock)
1480                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1481         ext2fs_mark_valid(fs);
1482         check_super_block(ctx);
1483         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1484                 fatal_error(ctx, 0);
1485         check_if_skip(ctx);
1486         check_resize_inode(ctx);
1487         if (bad_blocks_file)
1488                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1489         else if (cflag)
1490                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1491         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1492                 fatal_error(ctx, 0);
1493
1494         /*
1495          * Mark the system as valid, 'til proven otherwise
1496          */
1497         ext2fs_mark_valid(fs);
1498
1499         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1500         if (retval) {
1501                 com_err(ctx->program_name, retval,
1502                         _("while reading bad blocks inode"));
1503                 preenhalt(ctx);
1504                 printf(_("This doesn't bode well,"
1505                          " but we'll try to go on...\n"));
1506         }
1507
1508         /*
1509          * Save the journal size in megabytes.
1510          * Try and use the journal size from the backup else let e2fsck
1511          * find the default journal size.
1512          */
1513         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1514                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1515                                (sb->s_jnl_blocks[16] >> 20);
1516         else
1517                 journal_size = -1;
1518
1519         if (sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA) {
1520                 int qtype;
1521                 /* Quotas were enabled. Do quota accounting during fsck. */
1522                 if ((sb->s_usr_quota_inum && sb->s_grp_quota_inum) ||
1523                     (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum))
1524                         qtype = -1;
1525                 else
1526                         qtype = sb->s_usr_quota_inum ? USRQUOTA : GRPQUOTA;
1527
1528                 init_quota_context(&ctx->qctx, ctx->fs, qtype);
1529         }
1530
1531         run_result = e2fsck_run(ctx);
1532         e2fsck_clear_progbar(ctx);
1533
1534         if (ctx->flags & E2F_FLAG_JOURNAL_INODE) {
1535                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1536                         if (journal_size < 1024)
1537                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
1538                         if (journal_size < 0) {
1539                                 fs->super->s_feature_compat &=
1540                                         ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1541                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1542                                 com_err(ctx->program_name, 0,
1543                                         _("Couldn't determine journal size"));
1544                                 goto no_journal;
1545                         }
1546                         printf(_("Creating journal (%d blocks): "),
1547                                journal_size);
1548                         fflush(stdout);
1549                         retval = ext2fs_add_journal_inode(fs,
1550                                                           journal_size, 0);
1551                         if (retval) {
1552                                 com_err("Error ", retval,
1553                                         _("\n\twhile trying to create journal"));
1554                                 goto no_journal;
1555                         }
1556                         printf(_(" Done.\n"));
1557                         printf(_("\n*** journal has been re-created - "
1558                                        "filesystem is now ext3 again ***\n"));
1559                 }
1560         }
1561 no_journal:
1562
1563         if (ctx->qctx) {
1564                 write_quota_inode(ctx->qctx, -1);
1565                 release_quota_context(&ctx->qctx);
1566         }
1567
1568         if (run_result == E2F_FLAG_RESTART) {
1569                 printf(_("Restarting e2fsck from the beginning...\n"));
1570                 retval = e2fsck_reset_context(ctx);
1571                 if (retval) {
1572                         com_err(ctx->program_name, retval,
1573                                 _("while resetting context"));
1574                         fatal_error(ctx, 0);
1575                 }
1576                 ext2fs_close(fs);
1577                 goto restart;
1578         }
1579         if (run_result & E2F_FLAG_CANCEL) {
1580                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1581                        ctx->device_name : ctx->filesystem_name);
1582                 exit_value |= FSCK_CANCELED;
1583         }
1584         if (run_result & E2F_FLAG_ABORT)
1585                 fatal_error(ctx, _("aborted"));
1586         if (check_backup_super_block(ctx)) {
1587                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1588                 ext2fs_mark_super_dirty(fs);
1589         }
1590
1591 #ifdef MTRACE
1592         mtrace_print("Cleanup");
1593 #endif
1594         if (ext2fs_test_changed(fs)) {
1595                 exit_value |= FSCK_NONDESTRUCT;
1596                 if (!(ctx->options & E2F_OPT_PREEN))
1597                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1598                                ctx->device_name);
1599                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1600                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1601                                ctx->device_name);
1602                         exit_value |= FSCK_REBOOT;
1603                 }
1604         }
1605         if (!ext2fs_test_valid(fs) ||
1606             ((exit_value & FSCK_CANCELED) &&
1607              (sb->s_state & EXT2_ERROR_FS))) {
1608                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1609                          "errors **********\n\n"), ctx->device_name);
1610                 exit_value |= FSCK_UNCORRECTED;
1611                 exit_value &= ~FSCK_NONDESTRUCT;
1612         }
1613         if (exit_value & FSCK_CANCELED) {
1614                 int     allow_cancellation;
1615
1616                 profile_get_boolean(ctx->profile, "options",
1617                                     "allow_cancellation", 0, 0,
1618                                     &allow_cancellation);
1619                 exit_value &= ~FSCK_NONDESTRUCT;
1620                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1621                     (sb->s_state & EXT2_VALID_FS) &&
1622                     !(sb->s_state & EXT2_ERROR_FS))
1623                         exit_value = 0;
1624         } else {
1625                 show_stats(ctx);
1626                 if (!(ctx->options & E2F_OPT_READONLY)) {
1627                         if (ext2fs_test_valid(fs)) {
1628                                 if (!(sb->s_state & EXT2_VALID_FS))
1629                                         exit_value |= FSCK_NONDESTRUCT;
1630                                 sb->s_state = EXT2_VALID_FS;
1631                         } else
1632                                 sb->s_state &= ~EXT2_VALID_FS;
1633                         sb->s_mnt_count = 0;
1634                         if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
1635                                 sb->s_lastcheck = ctx->now;
1636                         memset(((char *) sb) + EXT4_S_ERR_START, 0,
1637                                EXT4_S_ERR_LEN);
1638                         ext2fs_mark_super_dirty(fs);
1639                 }
1640         }
1641
1642         if ((run_result & E2F_FLAG_CANCEL) == 0 &&
1643             sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM &&
1644             !(ctx->options & E2F_OPT_READONLY)) {
1645                 retval = ext2fs_set_gdt_csum(ctx->fs);
1646                 if (retval) {
1647                         com_err(ctx->program_name, retval,
1648                                 _("while setting block group checksum info"));
1649                         fatal_error(ctx, 0);
1650                 }
1651         }
1652
1653         e2fsck_write_bitmaps(ctx);
1654         io_channel_flush(ctx->fs->io);
1655         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
1656
1657         ext2fs_close(fs);
1658         ctx->fs = NULL;
1659         free(ctx->journal_name);
1660
1661         e2fsck_free_context(ctx);
1662         remove_error_table(&et_ext2_error_table);
1663         remove_error_table(&et_prof_error_table);
1664         return exit_value;
1665 }