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                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 134                                "%llu/%llu blocks\n"),
 135                         ctx->device_name, inodes_used, inodes,
 136                         frag_percent_total / 10, frag_percent_total % 10,
 137                         blocks_used, blocks);
 138                 return;
 139         }
 140         log_out(ctx, P_("\n%8u inode used (%2.2f%%)\n",
 141                         "\n%8u inodes used (%2.2f%%)\n",
 142                         inodes_used), inodes_used,
 143                 100.0 * inodes_used / inodes);
 144         log_out(ctx, P_("%8u non-contiguous file (%0d.%d%%)\n",
 145                         "%8u non-contiguous files (%0d.%d%%)\n",
 146                         ctx->fs_fragmented),
 147                 ctx->fs_fragmented, frag_percent_file / 10,
 148                 frag_percent_file % 10);
 149         log_out(ctx, P_("%8u non-contiguous directory (%0d.%d%%)\n",
 150                         "%8u non-contiguous directories (%0d.%d%%)\n",
 151                         ctx->fs_fragmented_dir),
 152                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 153                 frag_percent_dir % 10);
 154         log_out(ctx, _("         # of inodes with ind/dind/tind blocks: "
 155                        "%u/%u/%u\n"),
 156                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 157
 158         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 159                 if (ctx->extent_depth_count[j])
 160                         break;
 161         if (++j) {
 162                 log_out(ctx, _("         Extent depth histogram: "));
 163                 for (i=0; i < j; i++) {
 164                         if (i)
 165                                 fputc('/', stdout);
 166                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 167                 }
 168                 log_out(ctx, "\n");
 169         }
 170
 171         log_out(ctx, P_("%8llu block used (%2.2f%%)\n",
 172                         "%8llu blocks used (%2.2f%%)\n",
 173                    blocks_used), blocks_used, 100.0 * blocks_used / blocks);
 174         log_out(ctx, P_("%8u bad block\n", "%8u bad blocks\n",
 175                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 176         log_out(ctx, P_("%8u large file\n", "%8u large files\n",
 177                         ctx->large_files), ctx->large_files);
 178         log_out(ctx, P_("\n%8u regular file\n", "\n%8u regular files\n",
 179                         ctx->fs_regular_count), ctx->fs_regular_count);
 180         log_out(ctx, P_("%8u directory\n", "%8u directories\n",
 181                         ctx->fs_directory_count), ctx->fs_directory_count);
 182         log_out(ctx, P_("%8u character device file\n",
 183                         "%8u character device files\n", ctx->fs_chardev_count),
 184                 ctx->fs_chardev_count);
 185         log_out(ctx, P_("%8u block device file\n", "%8u block device files\n",
 186                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 187         log_out(ctx, P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count),
 188                 ctx->fs_fifo_count);
 189         log_out(ctx, P_("%8u link\n", "%8u links\n",
 190                         ctx->fs_links_count - dir_links),
 191                 ctx->fs_links_count - dir_links);
 192         log_out(ctx, P_("%8u symbolic link", "%8u symbolic links",
 193                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 194         log_out(ctx, P_(" (%u fast symbolic link)\n",
 195                         " (%u fast symbolic links)\n",
 196                         ctx->fs_fast_symlinks_count),
 197                 ctx->fs_fast_symlinks_count);
 198         log_out(ctx, P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count),
 199                 ctx->fs_sockets_count);
 200         log_out(ctx, "--------\n");
 201         log_out(ctx, P_("%8u file\n", "%8u files\n",
 202                         ctx->fs_total_count - dir_links),
 203                 ctx->fs_total_count - dir_links);
 204 }
 205
 206 static void check_mount(e2fsck_t ctx)
 207 {
 208         errcode_t       retval;
 209         int             cont;
 210
 211         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 212                                          &ctx->mount_flags);
 213         if (retval) {
 214                 com_err("ext2fs_check_if_mount", retval,
 215                         _("while determining whether %s is mounted."),
 216                         ctx->filesystem_name);
 217                 return;
 218         }
 219
 220         /*
 221          * If the filesystem isn't mounted, or it's the root
 222          * filesystem and it's mounted read-only, and we're not doing
 223          * a read/write check, then everything's fine.
 224          */
 225         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 226             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 227              (ctx->mount_flags & EXT2_MF_READONLY) &&
 228              !(ctx->options & E2F_OPT_WRITECHECK)))
 229                 return;
 230
 231         if ((ctx->options & E2F_OPT_READONLY) &&
 232             !(ctx->options & E2F_OPT_WRITECHECK)) {
 233                 log_out(ctx, _("Warning!  %s is mounted.\n"),
 234                         ctx->filesystem_name);
 235                 return;
 236         }
 237
 238         log_out(ctx, _("%s is mounted.  "), ctx->filesystem_name);
 239         if (!ctx->interactive)
 240                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 241         puts("\007\007\007\007");
 242         log_out(ctx, _("\n\nWARNING!!!  "
 243                        "The filesystem is mounted.   "
 244                        "If you continue you ***WILL***\n"
 245                        "cause ***SEVERE*** filesystem damage.\n\n"));
 246         puts("\007\007\007");
 247         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 248         if (!cont) {
 249                 printf (_("check aborted.\n"));
 250                 exit (0);
 251         }
 252         return;
 253 }
 254
 255 static int is_on_batt(void)
 256 {
 257         FILE    *f;
 258         DIR     *d;
 259         char    tmp[80], tmp2[80], fname[80];
 260         unsigned int    acflag;
 261         struct dirent*  de;
 262
 263         f = fopen("/sys/class/power_supply/AC/online", "r");
 264         if (f) {
 265                 if (fscanf(f, "%d\n", &acflag) == 1) {
 266                         fclose(f);
 267                         return (!acflag);
 268                 }
 269                 fclose(f);
 270         }
 271         f = fopen("/proc/apm", "r");
 272         if (f) {
 273                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 274                         acflag = 1;
 275                 fclose(f);
 276                 return (acflag != 1);
 277         }
 278         d = opendir("/proc/acpi/ac_adapter");
 279         if (d) {
 280                 while ((de=readdir(d)) != NULL) {
 281                         if (!strncmp(".", de->d_name, 1))
 282                                 continue;
 283                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 284                                  de->d_name);
 285                         f = fopen(fname, "r");
 286                         if (!f)
 287                                 continue;
 288                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 289                                 tmp[0] = 0;
 290                         fclose(f);
 291                         if (strncmp(tmp, "off-line", 8) == 0) {
 292                                 closedir(d);
 293                                 return 1;
 294                         }
 295                 }
 296                 closedir(d);
 297         }
 298         return 0;
 299 }
 300
 301 /*
 302  * This routine checks to see if a filesystem can be skipped; if so,
 303  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 304  * message explaining why a check is being forced.
 305  */
 306 static void check_if_skip(e2fsck_t ctx)
 307 {
 308         ext2_filsys fs = ctx->fs;
 309         struct problem_context pctx;
 310         const char *reason = NULL;
 311         unsigned int reason_arg = 0;
 312         long next_check;
 313         int batt = is_on_batt();
 314         int defer_check_on_battery;
 315         int broken_system_clock;
 316         time_t lastcheck;
 317
 318         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 319                             0, 0, &broken_system_clock);
 320         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 321                 broken_system_clock = 1;
 322         profile_get_boolean(ctx->profile, "options",
 323                             "defer_check_on_battery", 0, 1,
 324                             &defer_check_on_battery);
 325         if (!defer_check_on_battery)
 326                 batt = 0;
 327
 328         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 329                 return;
 330
 331         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 332                 goto skip;
 333
 334         lastcheck = fs->super->s_lastcheck;
 335         if (lastcheck > ctx->now)
 336                 lastcheck -= ctx->time_fudge;
 337         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 338             !ext2fs_test_valid(fs))
 339                 reason = _(" contains a file system with errors");
 340         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 341                 reason = _(" was not cleanly unmounted");
 342         else if (check_backup_super_block(ctx))
 343                 reason = _(" primary superblock features different from backup");
 344         else if ((fs->super->s_max_mnt_count > 0) &&
 345                  (fs->super->s_mnt_count >=
 346                   (unsigned) fs->super->s_max_mnt_count)) {
 347                 reason = _(" has been mounted %u times without being checked");
 348                 reason_arg = fs->super->s_mnt_count;
 349                 if (batt && (fs->super->s_mnt_count <
 350                              (unsigned) fs->super->s_max_mnt_count*2))
 351                         reason = 0;
 352         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 353                    (ctx->now < lastcheck)) {
 354                 reason = _(" has filesystem last checked time in the future");
 355                 if (batt)
 356                         reason = 0;
 357         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 358                    ((ctx->now - lastcheck) >=
 359                     ((time_t) fs->super->s_checkinterval))) {
 360                 reason = _(" has gone %u days without being checked");
 361                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 362                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 363                              fs->super->s_checkinterval*2))
 364                         reason = 0;
 365         }
 366         if (reason) {
 367                 log_out(ctx, "%s", ctx->device_name);
 368                 log_out(ctx, reason, reason_arg);
 369                 log_out(ctx, _(", check forced.\n"));
 370                 return;
 371         }
 372
 373         /*
 374          * Update the global counts from the block group counts.  This
 375          * is needed since modern kernels don't update the global
 376          * counts so as to avoid locking the entire file system.  So
 377          * if the filesystem is not unmounted cleanly, the global
 378          * counts may not be accurate.  Update them here if we can,
 379          * for the benefit of users who might examine the file system
 380          * using dumpe2fs.  (This is for cosmetic reasons only.)
 381          */
 382         clear_problem_context(&pctx);
 383         pctx.ino = fs->super->s_free_inodes_count;
 384         pctx.ino2 = ctx->free_inodes;
 385         if ((pctx.ino != pctx.ino2) &&
 386             !(ctx->options & E2F_OPT_READONLY) &&
 387             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 388                 fs->super->s_free_inodes_count = ctx->free_inodes;
 389                 ext2fs_mark_super_dirty(fs);
 390         }
 391         clear_problem_context(&pctx);
 392         pctx.blk = ext2fs_free_blocks_count(fs->super);
 393         pctx.blk2 = ctx->free_blocks;
 394         if ((pctx.blk != pctx.blk2) &&
 395             !(ctx->options & E2F_OPT_READONLY) &&
 396             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 397                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 398                 ext2fs_mark_super_dirty(fs);
 399         }
 400
 401         /* Print the summary message when we're skipping a full check */
 402         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 403                 ctx->device_name,
 404                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 405                 fs->super->s_inodes_count,
 406                 ext2fs_blocks_count(fs->super) -
 407                 ext2fs_free_blocks_count(fs->super),
 408                 ext2fs_blocks_count(fs->super));
 409         next_check = 100000;
 410         if (fs->super->s_max_mnt_count > 0) {
 411                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 412                 if (next_check <= 0)
 413                         next_check = 1;
 414         }
 415         if (!broken_system_clock && fs->super->s_checkinterval &&
 416             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 417                 next_check = 1;
 418         if (next_check <= 5) {
 419                 if (next_check == 1) {
 420                         if (batt)
 421                                 log_out(ctx, _(" (check deferred; "
 422                                                "on battery)"));
 423                         else
 424                                 log_out(ctx, _(" (check after next mount)"));
 425                 } else
 426                         log_out(ctx, _(" (check in %ld mounts)"), next_check);
 427         }
 428         log_out(ctx, "\n");
 429 skip:
 430         ext2fs_close(fs);
 431         ctx->fs = NULL;
 432         e2fsck_free_context(ctx);
 433         exit(FSCK_OK);
 434 }
 435
 436 /*
 437  * For completion notice
 438  */
 439 struct percent_tbl {
 440         int     max_pass;
 441         int     table[32];
 442 };
 443 struct percent_tbl e2fsck_tbl = {
 444         5, { 0, 70, 90, 92,  95, 100 }
 445 };
 446 static char bar[128], spaces[128];
 447
 448 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 449                           int max)
 450 {
 451         float   percent;
 452
 453         if (pass <= 0)
 454                 return 0.0;
 455         if (pass > tbl->max_pass || max == 0)
 456                 return 100.0;
 457         percent = ((float) curr) / ((float) max);
 458         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 459                 + tbl->table[pass-1]);
 460 }
 461
 462 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 463 {
 464         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 465                 return;
 466
 467         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 468                ctx->stop_meta);
 469         fflush(stdout);
 470         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 471 }
 472
 473 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 474                            unsigned int dpynum)
 475 {
 476         static const char spinner[] = "\\|/-";
 477         int     i;
 478         unsigned int    tick;
 479         struct timeval  tv;
 480         int dpywidth;
 481         int fixed_percent;
 482
 483         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 484                 return 0;
 485
 486         /*
 487          * Calculate the new progress position.  If the
 488          * percentage hasn't changed, then we skip out right
 489          * away.
 490          */
 491         fixed_percent = (int) ((10 * percent) + 0.5);
 492         if (ctx->progress_last_percent == fixed_percent)
 493                 return 0;
 494         ctx->progress_last_percent = fixed_percent;
 495
 496         /*
 497          * If we've already updated the spinner once within
 498          * the last 1/8th of a second, no point doing it
 499          * again.
 500          */
 501         gettimeofday(&tv, NULL);
 502         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 503         if ((tick == ctx->progress_last_time) &&
 504             (fixed_percent != 0) && (fixed_percent != 1000))
 505                 return 0;
 506         ctx->progress_last_time = tick;
 507
 508         /*
 509          * Advance the spinner, and note that the progress bar
 510          * will be on the screen
 511          */
 512         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 513         ctx->flags |= E2F_FLAG_PROG_BAR;
 514
 515         dpywidth = 66 - strlen(label);
 516         dpywidth = 8 * (dpywidth / 8);
 517         if (dpynum)
 518                 dpywidth -= 8;
 519
 520         i = ((percent * dpywidth) + 50) / 100;
 521         printf("%s%s: |%s%s", ctx->start_meta, label,
 522                bar + (sizeof(bar) - (i+1)),
 523                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 524         if (fixed_percent == 1000)
 525                 fputc('|', stdout);
 526         else
 527                 fputc(spinner[ctx->progress_pos & 3], stdout);
 528         printf(" %4.1f%%  ", percent);
 529         if (dpynum)
 530                 printf("%u\r", dpynum);
 531         else
 532                 fputs(" \r", stdout);
 533         fputs(ctx->stop_meta, stdout);
 534
 535         if (fixed_percent == 1000)
 536                 e2fsck_clear_progbar(ctx);
 537         fflush(stdout);
 538
 539         return 0;
 540 }
 541
 542 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 543                                   unsigned long cur, unsigned long max)
 544 {
 545         char buf[1024];
 546         float percent;
 547
 548         if (pass == 0)
 549                 return 0;
 550
 551         if (ctx->progress_fd) {
 552                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 553                          pass, cur, max, ctx->device_name);
 554                 write_all(ctx->progress_fd, buf, strlen(buf));
 555         } else {
 556                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 557                 e2fsck_simple_progress(ctx, ctx->device_name,
 558                                        percent, 0);
 559         }
 560         return 0;
 561 }
 562
 563 #define PATH_SET "PATH=/sbin"
 564
 565 /*
 566  * Make sure 0,1,2 file descriptors are open, so that we don't open
 567  * the filesystem using the same file descriptor as stdout or stderr.
 568  */
 569 static void reserve_stdio_fds(void)
 570 {
 571         int     fd = 0;
 572
 573         while (fd <= 2) {
 574                 fd = open("/dev/null", O_RDWR);
 575                 if (fd < 0) {
 576                         fprintf(stderr, _("ERROR: Couldn't open "
 577                                 "/dev/null (%s)\n"),
 578                                 strerror(errno));
 579                         break;
 580                 }
 581         }
 582 }
 583
 584 #ifdef HAVE_SIGNAL_H
 585 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 586 {
 587         e2fsck_t ctx = e2fsck_global_ctx;
 588
 589         if (!ctx)
 590                 return;
 591
 592         ctx->progress = e2fsck_update_progress;
 593 }
 594
 595 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 596 {
 597         e2fsck_t ctx = e2fsck_global_ctx;
 598
 599         if (!ctx)
 600                 return;
 601
 602         e2fsck_clear_progbar(ctx);
 603         ctx->progress = 0;
 604 }
 605
 606 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 607 {
 608         e2fsck_t ctx = e2fsck_global_ctx;
 609
 610         if (!ctx)
 611                 exit(FSCK_CANCELED);
 612
 613         ctx->flags |= E2F_FLAG_CANCEL;
 614 }
 615 #endif
 616
 617 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 618 {
 619         char    *buf, *token, *next, *p, *arg;
 620         int     ea_ver;
 621         int     extended_usage = 0;
 622
 623         buf = string_copy(ctx, opts, 0);
 624         for (token = buf; token && *token; token = next) {
 625                 p = strchr(token, ',');
 626                 next = 0;
 627                 if (p) {
 628                         *p = 0;
 629                         next = p+1;
 630                 }
 631                 arg = strchr(token, '=');
 632                 if (arg) {
 633                         *arg = 0;
 634                         arg++;
 635                 }
 636                 if (strcmp(token, "ea_ver") == 0) {
 637                         if (!arg) {
 638                                 extended_usage++;
 639                                 continue;
 640                         }
 641                         ea_ver = strtoul(arg, &p, 0);
 642                         if (*p ||
 643                             ((ea_ver != 1) && (ea_ver != 2))) {
 644                                 fprintf(stderr,
 645                                         _("Invalid EA version.\n"));
 646                                 extended_usage++;
 647                                 continue;
 648                         }
 649                         ctx->ext_attr_ver = ea_ver;
 650                 } else if (strcmp(token, "fragcheck") == 0) {
 651                         ctx->options |= E2F_OPT_FRAGCHECK;
 652                         continue;
 653                 } else if (strcmp(token, "journal_only") == 0) {
 654                         if (arg) {
 655                                 extended_usage++;
 656                                 continue;
 657                         }
 658                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 659                 } else if (strcmp(token, "discard") == 0) {
 660                         ctx->options |= E2F_OPT_DISCARD;
 661                         continue;
 662                 } else if (strcmp(token, "nodiscard") == 0) {
 663                         ctx->options &= ~E2F_OPT_DISCARD;
 664                         continue;
 665                 } else if (strcmp(token, "log_filename") == 0) {
 666                         if (!arg)
 667                                 extended_usage++;
 668                         else
 669                                 ctx->log_fn = string_copy(ctx, arg, 0);
 670                         continue;
 671                 } else {
 672                         fprintf(stderr, _("Unknown extended option: %s\n"),
 673                                 token);
 674                         extended_usage++;
 675                 }
 676         }
 677         free(buf);
 678
 679         if (extended_usage) {
 680                 fputs(("\nExtended options are separated by commas, "
 681                        "and may take an argument which\n"
 682                        "is set off by an equals ('=') sign.  "
 683                        "Valid extended options are:\n"), stderr);
 684                 fputs(("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 685                 fputs(("\tfragcheck\n"), stderr);
 686                 fputs(("\tjournal_only\n"), stderr);
 687                 fputs(("\tdiscard\n"), stderr);
 688                 fputs(("\tnodiscard\n"), stderr);
 689                 fputc('\n', stderr);
 690                 exit(1);
 691         }
 692 }
 693
 694 static void syntax_err_report(const char *filename, long err, int line_num)
 695 {
 696         fprintf(stderr,
 697                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 698                 filename, line_num, error_message(err));
 699         exit(FSCK_ERROR);
 700 }
 701
 702 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 703
 704 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 705 {
 706         int             flush = 0;
 707         int             c, fd;
 708 #ifdef MTRACE
 709         extern void     *mallwatch;
 710 #endif
 711         e2fsck_t        ctx;
 712         errcode_t       retval;
 713 #ifdef HAVE_SIGNAL_H
 714         struct sigaction        sa;
 715 #endif
 716         char            *extended_opts = 0;
 717         char            *cp;
 718         int             res;            /* result of sscanf */
 719 #ifdef CONFIG_JBD_DEBUG
 720         char            *jbd_debug;
 721 #endif
 722
 723         retval = e2fsck_allocate_context(&ctx);
 724         if (retval)
 725                 return retval;
 726
 727         *ret_ctx = ctx;
 728
 729         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 730         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 731         if (isatty(0) && isatty(1)) {
 732                 ctx->interactive = 1;
 733         } else {
 734                 ctx->start_meta[0] = '\001';
 735                 ctx->stop_meta[0] = '\002';
 736         }
 737         memset(bar, '=', sizeof(bar)-1);
 738         memset(spaces, ' ', sizeof(spaces)-1);
 739         add_error_table(&et_ext2_error_table);
 740         add_error_table(&et_prof_error_table);
 741         blkid_get_cache(&ctx->blkid, NULL);
 742
 743         if (argc && *argv)
 744                 ctx->program_name = *argv;
 745         else
 746                 ctx->program_name = "e2fsck";
 747
 748         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 749                 switch (c) {
 750                 case 'C':
 751                         ctx->progress = e2fsck_update_progress;
 752                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 753                         if (res != 1)
 754                                 goto sscanf_err;
 755
 756                         if (ctx->progress_fd < 0) {
 757                                 ctx->progress = 0;
 758                                 ctx->progress_fd = ctx->progress_fd * -1;
 759                         }
 760                         if (!ctx->progress_fd)
 761                                 break;
 762                         /* Validate the file descriptor to avoid disasters */
 763                         fd = dup(ctx->progress_fd);
 764                         if (fd < 0) {
 765                                 fprintf(stderr,
 766                                 _("Error validating file descriptor %d: %s\n"),
 767                                         ctx->progress_fd,
 768                                         error_message(errno));
 769                                 fatal_error(ctx,
 770                         _("Invalid completion information file descriptor"));
 771                         } else
 772                                 close(fd);
 773                         break;
 774                 case 'D':
 775                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 776                         break;
 777                 case 'E':
 778                         extended_opts = optarg;
 779                         break;
 780                 case 'p':
 781                 case 'a':
 782                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 783                         conflict_opt:
 784                                 fatal_error(ctx,
 785         _("Only one of the options -p/-a, -n or -y may be specified."));
 786                         }
 787                         ctx->options |= E2F_OPT_PREEN;
 788                         break;
 789                 case 'n':
 790                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 791                                 goto conflict_opt;
 792                         ctx->options |= E2F_OPT_NO;
 793                         break;
 794                 case 'y':
 795                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 796                                 goto conflict_opt;
 797                         ctx->options |= E2F_OPT_YES;
 798                         break;
 799                 case 't':
 800 #ifdef RESOURCE_TRACK
 801                         if (ctx->options & E2F_OPT_TIME)
 802                                 ctx->options |= E2F_OPT_TIME2;
 803                         else
 804                                 ctx->options |= E2F_OPT_TIME;
 805 #else
 806                         fprintf(stderr, _("The -t option is not "
 807                                 "supported on this version of e2fsck.\n"));
 808 #endif
 809                         break;
 810                 case 'c':
 811                         if (cflag++)
 812                                 ctx->options |= E2F_OPT_WRITECHECK;
 813                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 814                         break;
 815                 case 'r':
 816                         /* What we do by default, anyway! */
 817                         break;
 818                 case 'b':
 819                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
 820                         if (res != 1)
 821                                 goto sscanf_err;
 822                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 823                         break;
 824                 case 'B':
 825                         ctx->blocksize = atoi(optarg);
 826                         break;
 827                 case 'I':
 828                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 829                         if (res != 1)
 830                                 goto sscanf_err;
 831                         break;
 832                 case 'j':
 833                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 834                                                               optarg, NULL);
 835                         if (!ctx->journal_name) {
 836                                 com_err(ctx->program_name, 0,
 837                                         _("Unable to resolve '%s'"),
 838                                         optarg);
 839                                 fatal_error(ctx, 0);
 840                         }
 841                         break;
 842                 case 'P':
 843                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 844                         if (res != 1)
 845                                 goto sscanf_err;
 846                         break;
 847                 case 'L':
 848                         replace_bad_blocks++;
 849                 case 'l':
 850                         bad_blocks_file = string_copy(ctx, optarg, 0);
 851                         break;
 852                 case 'd':
 853                         ctx->options |= E2F_OPT_DEBUG;
 854                         break;
 855                 case 'f':
 856                         ctx->options |= E2F_OPT_FORCE;
 857                         break;
 858                 case 'F':
 859                         flush = 1;
 860                         break;
 861                 case 'v':
 862                         verbose = 1;
 863                         break;
 864                 case 'V':
 865                         show_version_only = 1;
 866                         break;
 867 #ifdef MTRACE
 868                 case 'M':
 869                         mallwatch = (void *) strtol(optarg, NULL, 0);
 870                         break;
 871 #endif
 872                 case 'N':
 873                         ctx->device_name = string_copy(ctx, optarg, 0);
 874                         break;
 875                 case 'k':
 876                         keep_bad_blocks++;
 877                         break;
 878                 default:
 879                         usage(ctx);
 880                 }
 881         if (show_version_only)
 882                 return 0;
 883         if (optind != argc - 1)
 884                 usage(ctx);
 885         if ((ctx->options & E2F_OPT_NO) &&
 886             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
 887                 com_err(ctx->program_name, 0,
 888                         _("The -n and -D options are incompatible."));
 889                 fatal_error(ctx, 0);
 890         }
 891         if ((ctx->options & E2F_OPT_NO) && cflag) {
 892                 com_err(ctx->program_name, 0,
 893                         _("The -n and -c options are incompatible."));
 894                 fatal_error(ctx, 0);
 895         }
 896         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
 897                 com_err(ctx->program_name, 0,
 898                         _("The -n and -l/-L options are incompatible."));
 899                 fatal_error(ctx, 0);
 900         }
 901         if (ctx->options & E2F_OPT_NO)
 902                 ctx->options |= E2F_OPT_READONLY;
 903
 904         ctx->io_options = strchr(argv[optind], '?');
 905         if (ctx->io_options)
 906                 *ctx->io_options++ = 0;
 907         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 908         if (!ctx->filesystem_name) {
 909                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 910                         argv[optind]);
 911                 fatal_error(ctx, 0);
 912         }
 913         if (extended_opts)
 914                 parse_extended_opts(ctx, extended_opts);
 915
 916         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 917                 config_fn[0] = cp;
 918         profile_set_syntax_err_cb(syntax_err_report);
 919         profile_init(config_fn, &ctx->profile);
 920
 921         /* Turn off discard in read-only mode */
 922         if ((ctx->options & E2F_OPT_NO) &&
 923             (ctx->options & E2F_OPT_DISCARD))
 924                 ctx->options &= ~E2F_OPT_DISCARD;
 925
 926         if (flush) {
 927                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 928                 if (fd < 0) {
 929                         com_err("open", errno,
 930                                 _("while opening %s for flushing"),
 931                                 ctx->filesystem_name);
 932                         fatal_error(ctx, 0);
 933                 }
 934                 if ((retval = ext2fs_sync_device(fd, 1))) {
 935                         com_err("ext2fs_sync_device", retval,
 936                                 _("while trying to flush %s"),
 937                                 ctx->filesystem_name);
 938                         fatal_error(ctx, 0);
 939                 }
 940                 close(fd);
 941         }
 942         if (cflag && bad_blocks_file) {
 943                 fprintf(stderr, _("The -c and the -l/-L options may "
 944                                   "not be both used at the same time.\n"));
 945                 exit(FSCK_USAGE);
 946         }
 947 #ifdef HAVE_SIGNAL_H
 948         /*
 949          * Set up signal action
 950          */
 951         memset(&sa, 0, sizeof(struct sigaction));
 952         sa.sa_handler = signal_cancel;
 953         sigaction(SIGINT, &sa, 0);
 954         sigaction(SIGTERM, &sa, 0);
 955 #ifdef SA_RESTART
 956         sa.sa_flags = SA_RESTART;
 957 #endif
 958         e2fsck_global_ctx = ctx;
 959         sa.sa_handler = signal_progress_on;
 960         sigaction(SIGUSR1, &sa, 0);
 961         sa.sa_handler = signal_progress_off;
 962         sigaction(SIGUSR2, &sa, 0);
 963 #endif
 964
 965         /* Update our PATH to include /sbin if we need to run badblocks  */
 966         if (cflag) {
 967                 char *oldpath = getenv("PATH");
 968                 char *newpath;
 969                 int len = sizeof(PATH_SET) + 1;
 970
 971                 if (oldpath)
 972                         len += strlen(oldpath);
 973
 974                 newpath = malloc(len);
 975                 if (!newpath)
 976                         fatal_error(ctx, "Couldn't malloc() newpath");
 977                 strcpy(newpath, PATH_SET);
 978
 979                 if (oldpath) {
 980                         strcat(newpath, ":");
 981                         strcat(newpath, oldpath);
 982                 }
 983                 putenv(newpath);
 984         }
 985 #ifdef CONFIG_JBD_DEBUG
 986         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
 987         if (jbd_debug) {
 988                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
 989                 if (res != 1) {
 990                         fprintf(stderr,
 991                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
 992                                 jbd_debug);
 993                         exit (1);
 994                 }
 995         }
 996 #endif
 997         return 0;
 998
 999 sscanf_err:
1000         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1001                 c, optarg);
1002         exit (1);
1003 }
1004
1005 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1006                              ext2_filsys *ret_fs)
1007 {
1008         errcode_t retval;
1009
1010         *ret_fs = NULL;
1011         if (ctx->superblock && ctx->blocksize) {
1012                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1013                                       flags, ctx->superblock, ctx->blocksize,
1014                                       io_ptr, ret_fs);
1015         } else if (ctx->superblock) {
1016                 int blocksize;
1017                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1018                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1019                         if (*ret_fs) {
1020                                 ext2fs_free(*ret_fs);
1021                                 *ret_fs = NULL;
1022                         }
1023                         retval = ext2fs_open2(ctx->filesystem_name,
1024                                               ctx->io_options, flags,
1025                                               ctx->superblock, blocksize,
1026                                               io_ptr, ret_fs);
1027                         if (!retval)
1028                                 break;
1029                 }
1030         } else
1031                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1032                                       flags, 0, 0, io_ptr, ret_fs);
1033
1034         if (ret_fs)
1035                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1036                                        "default", NULL);
1037         return retval;
1038 }
1039
1040 static const char *my_ver_string = E2FSPROGS_VERSION;
1041 static const char *my_ver_date = E2FSPROGS_DATE;
1042
1043 int e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1044 {
1045         struct mmp_struct *mmp_s;
1046         unsigned int mmp_check_interval;
1047         errcode_t retval = 0;
1048         struct problem_context pctx;
1049         unsigned int wait_time = 0;
1050
1051         clear_problem_context(&pctx);
1052         if (fs->mmp_buf == NULL) {
1053                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1054                 if (retval)
1055                         goto check_error;
1056         }
1057
1058         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1059         if (retval)
1060                 goto check_error;
1061
1062         mmp_s = fs->mmp_buf;
1063
1064         mmp_check_interval = fs->super->s_mmp_update_interval;
1065         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1066                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1067
1068         /*
1069          * If check_interval in MMP block is larger, use that instead of
1070          * check_interval from the superblock.
1071          */
1072         if (mmp_s->mmp_check_interval > mmp_check_interval)
1073                 mmp_check_interval = mmp_s->mmp_check_interval;
1074
1075         wait_time = mmp_check_interval * 2 + 1;
1076
1077         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1078                 retval = 0;
1079         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1080                 retval = EXT2_ET_MMP_FSCK_ON;
1081         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1082                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1083
1084         if (retval)
1085                 goto check_error;
1086
1087         /* Print warning if e2fck will wait for more than 20 secs. */
1088         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1089                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1090                                "time is %u seconds. Please wait...\n"),
1091                         mmp_check_interval, wait_time * 2);
1092         }
1093
1094         return 0;
1095
1096 check_error:
1097
1098         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1099                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1100                         fs->super->s_mmp_block = 0;
1101                         ext2fs_mark_super_dirty(fs);
1102                         retval = 0;
1103                 }
1104         } else if (retval == EXT2_ET_MMP_FAILED) {
1105                 com_err(ctx->program_name, retval,
1106                         _("while checking MMP block"));
1107                 dump_mmp_msg(fs->mmp_buf, NULL);
1108         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1109                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1110                 com_err(ctx->program_name, retval,
1111                         _("while checking MMP block"));
1112                 dump_mmp_msg(fs->mmp_buf,
1113                              _("If you are sure the filesystem is not "
1114                                "in use on any node, run:\n"
1115                                "'tune2fs -f -E clear_mmp {device}'\n"));
1116         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1117                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1118                         ext2fs_mmp_clear(fs);
1119                         retval = 0;
1120                 }
1121         }
1122         return retval;
1123 }
1124
1125 int main (int argc, char *argv[])
1126 {
1127         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1128         int             exit_value = FSCK_OK;
1129         ext2_filsys     fs = 0;
1130         io_manager      io_ptr;
1131         struct ext2_super_block *sb;
1132         const char      *lib_ver_date;
1133         int             my_ver, lib_ver;
1134         e2fsck_t        ctx;
1135         blk_t           orig_superblock;
1136         struct problem_context pctx;
1137         int flags, run_result;
1138         int journal_size;
1139         int sysval, sys_page_size = 4096;
1140         int old_bitmaps;
1141         __u32 features[3];
1142         char *cp;
1143
1144         clear_problem_context(&pctx);
1145         sigcatcher_setup();
1146 #ifdef MTRACE
1147         mtrace();
1148 #endif
1149 #ifdef MCHECK
1150         mcheck(0);
1151 #endif
1152 #ifdef ENABLE_NLS
1153         setlocale(LC_MESSAGES, "");
1154         setlocale(LC_CTYPE, "");
1155         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1156         textdomain(NLS_CAT_NAME);
1157         set_com_err_gettext(gettext);
1158 #endif
1159         my_ver = ext2fs_parse_version_string(my_ver_string);
1160         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1161         if (my_ver > lib_ver) {
1162                 fprintf( stderr, _("Error: ext2fs library version "
1163                         "out of date!\n"));
1164                 show_version_only++;
1165         }
1166
1167         retval = PRS(argc, argv, &ctx);
1168         if (retval) {
1169                 com_err("e2fsck", retval,
1170                         _("while trying to initialize program"));
1171                 exit(FSCK_ERROR);
1172         }
1173         reserve_stdio_fds();
1174
1175         set_up_logging(ctx);
1176         if (ctx->logf) {
1177                 int i;
1178                 fputs("E2fsck run: ", ctx->logf);
1179                 for (i = 0; i < argc; i++) {
1180                         if (i)
1181                                 fputc(' ', ctx->logf);
1182                         fputs(argv[i], ctx->logf);
1183                 }
1184                 fputc('\n', ctx->logf);
1185         }
1186
1187         init_resource_track(&ctx->global_rtrack, NULL);
1188         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1189                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1190                          my_ver_date);
1191
1192         if (show_version_only) {
1193                 log_err(ctx, _("\tUsing %s, %s\n"),
1194                         error_message(EXT2_ET_BASE), lib_ver_date);
1195                 exit(FSCK_OK);
1196         }
1197
1198         check_mount(ctx);
1199
1200         if (!(ctx->options & E2F_OPT_PREEN) &&
1201             !(ctx->options & E2F_OPT_NO) &&
1202             !(ctx->options & E2F_OPT_YES)) {
1203                 if (!ctx->interactive)
1204                         fatal_error(ctx,
1205                                     _("need terminal for interactive repairs"));
1206         }
1207         ctx->superblock = ctx->use_superblock;
1208
1209         flags = EXT2_FLAG_SKIP_MMP;
1210 restart:
1211 #ifdef CONFIG_TESTIO_DEBUG
1212         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1213                 io_ptr = test_io_manager;
1214                 test_io_backing_manager = unix_io_manager;
1215         } else
1216 #endif
1217                 io_ptr = unix_io_manager;
1218         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1219         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1220                             &old_bitmaps);
1221         if (!old_bitmaps)
1222                 flags |= EXT2_FLAG_64BITS;
1223         if ((ctx->options & E2F_OPT_READONLY) == 0)
1224                 flags |= EXT2_FLAG_RW;
1225         if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
1226                 flags |= EXT2_FLAG_EXCLUSIVE;
1227
1228         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1229
1230         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1231             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1232             ((retval == EXT2_ET_BAD_MAGIC) ||
1233              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1234              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1235                 if (retval) {
1236                         pctx.errcode = retval;
1237                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1238                 }
1239                 if (retval2) {
1240                         pctx.errcode = retval2;
1241                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1242                 }
1243                 pctx.errcode = 0;
1244                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1245                         retval = retval2;
1246                         goto failure;
1247                 }
1248                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1249                         ext2fs_free(fs);
1250                         fs = NULL;
1251                 }
1252                 if (!fs || (fs->group_desc_count > 1)) {
1253                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1254                                 ctx->program_name,
1255                                 retval ? _("Superblock invalid,") :
1256                                 _("Group descriptors look bad..."));
1257                         orig_superblock = ctx->superblock;
1258                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1259                         if (fs)
1260                                 ext2fs_close(fs);
1261                         orig_retval = retval;
1262                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1263                         if ((orig_retval == 0) && retval != 0) {
1264                                 if (fs)
1265                                         ext2fs_close(fs);
1266                                 log_out(ctx, _("%s: %s while using the "
1267                                                "backup blocks"),
1268                                         ctx->program_name,
1269                                         error_message(retval));
1270                                 log_out(ctx, _("%s: going back to original "
1271                                                "superblock\n"),
1272                                         ctx->program_name);
1273                                 ctx->superblock = orig_superblock;
1274                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1275                         }
1276                 }
1277         }
1278         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1279              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1280             fs && fs->super) {
1281                 sb = fs->super;
1282                 features[0] = (sb->s_feature_compat &
1283                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1284                 features[1] = (sb->s_feature_incompat &
1285                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1286                 features[2] = (sb->s_feature_ro_compat &
1287                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1288                 if (features[0] || features[1] || features[2])
1289                         goto print_unsupp_features;
1290         }
1291 failure:
1292         if (retval) {
1293                 if (orig_retval)
1294                         retval = orig_retval;
1295                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1296                         ctx->filesystem_name);
1297                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1298                         log_out(ctx, _("The filesystem revision is apparently "
1299                                "too high for this version of e2fsck.\n"
1300                                "(Or the filesystem superblock "
1301                                "is corrupt)\n\n"));
1302                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1303                 } else if (retval == EXT2_ET_SHORT_READ)
1304                         log_out(ctx, _("Could this be a zero-length "
1305                                        "partition?\n"));
1306                 else if ((retval == EPERM) || (retval == EACCES))
1307                         log_out(ctx, _("You must have %s access to the "
1308                                "filesystem or be root\n"),
1309                                (ctx->options & E2F_OPT_READONLY) ?
1310                                "r/o" : "r/w");
1311                 else if (retval == ENXIO)
1312                         log_out(ctx, _("Possibly non-existent or "
1313                                        "swap device?\n"));
1314                 else if (retval == EBUSY)
1315                         log_out(ctx, _("Filesystem mounted or opened "
1316                                  "exclusively by another program?\n"));
1317                 else if (retval == ENOENT)
1318                         log_out(ctx, _("Possibly non-existent device?\n"));
1319 #ifdef EROFS
1320                 else if (retval == EROFS)
1321                         log_out(ctx, _("Disk write-protected; use the -n "
1322                                        "option to do a read-only\n"
1323                                        "check of the device.\n"));
1324 #endif
1325                 else
1326                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1327                 fatal_error(ctx, 0);
1328         }
1329         /*
1330          * We only update the master superblock because (a) paranoia;
1331          * we don't want to corrupt the backup superblocks, and (b) we
1332          * don't need to update the mount count and last checked
1333          * fields in the backup superblock (the kernel doesn't update
1334          * the backup superblocks anyway).  With newer versions of the
1335          * library this flag is set by ext2fs_open2(), but we set this
1336          * here just to be sure.  (No, we don't support e2fsck running
1337          * with some other libext2fs than the one that it was shipped
1338          * with, but just in case....)
1339          */
1340         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1341
1342         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1343                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1344                 int need_restart = 0;
1345
1346                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1347                                                        blocksize,
1348                                                        &ctx->num_blocks);
1349                 /*
1350                  * The floppy driver refuses to allow anyone else to
1351                  * open the device if has been opened with O_EXCL;
1352                  * this is unlike other block device drivers in Linux.
1353                  * To handle this, we close the filesystem and then
1354                  * reopen the filesystem after we get the device size.
1355                  */
1356                 if (pctx.errcode == EBUSY) {
1357                         ext2fs_close(fs);
1358                         need_restart++;
1359                         pctx.errcode =
1360                                 ext2fs_get_device_size2(ctx->filesystem_name,
1361                                                         blocksize,
1362                                                         &ctx->num_blocks);
1363                 }
1364                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1365                         ctx->num_blocks = 0;
1366                 else if (pctx.errcode) {
1367                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1368                         ctx->flags |= E2F_FLAG_ABORT;
1369                         fatal_error(ctx, 0);
1370                 }
1371                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1372                 if (need_restart)
1373                         goto restart;
1374         }
1375
1376         ctx->fs = fs;
1377         fs->priv_data = ctx;
1378         fs->now = ctx->now;
1379         sb = fs->super;
1380
1381         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1382                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1383                         _("while trying to open %s"),
1384                         ctx->filesystem_name);
1385         get_newer:
1386                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1387         }
1388
1389         /*
1390          * Set the device name, which is used whenever we print error
1391          * or informational messages to the user.
1392          */
1393         if (ctx->device_name == 0 &&
1394             (sb->s_volume_name[0] != 0)) {
1395                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1396                                                sizeof(sb->s_volume_name));
1397         }
1398         if (ctx->device_name == 0)
1399                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1400         for (cp = ctx->device_name; *cp; cp++)
1401                 if (isspace(*cp) || *cp == ':')
1402                         *cp = '_';
1403
1404         ehandler_init(fs->io);
1405
1406         if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
1407             (flags & EXT2_FLAG_SKIP_MMP)) {
1408                 if (e2fsck_check_mmp(fs, ctx))
1409                         fatal_error(ctx, 0);
1410
1411                 /*
1412                  * Restart in order to reopen fs but this time start mmp.
1413                  */
1414                 ext2fs_close(fs);
1415                 ctx->fs = NULL;
1416                 flags &= ~EXT2_FLAG_SKIP_MMP;
1417                 goto restart;
1418         }
1419
1420         if (ctx->logf)
1421                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1422                         e2p_uuid2str(sb->s_uuid));
1423
1424         if ((ctx->mount_flags & EXT2_MF_MOUNTED) &&
1425             !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER))
1426                 goto skip_journal;
1427
1428         /*
1429          * Make sure the ext3 superblock fields are consistent.
1430          */
1431         retval = e2fsck_check_ext3_journal(ctx);
1432         if (retval) {
1433                 com_err(ctx->program_name, retval,
1434                         _("while checking ext3 journal for %s"),
1435                         ctx->device_name);
1436                 fatal_error(ctx, 0);
1437         }
1438
1439         /*
1440          * Check to see if we need to do ext3-style recovery.  If so,
1441          * do it, and then restart the fsck.
1442          */
1443         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1444                 if (ctx->options & E2F_OPT_READONLY) {
1445                         log_out(ctx, _("Warning: skipping journal recovery "
1446                                        "because doing a read-only filesystem "
1447                                        "check.\n"));
1448                         io_channel_flush(ctx->fs->io);
1449                 } else {
1450                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1451                                 /*
1452                                  * Whoops, we attempted to run the
1453                                  * journal twice.  This should never
1454                                  * happen, unless the hardware or
1455                                  * device driver is being bogus.
1456                                  */
1457                                 com_err(ctx->program_name, 0,
1458                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1459                                 fatal_error(ctx, 0);
1460                         }
1461                         retval = e2fsck_run_ext3_journal(ctx);
1462                         if (retval) {
1463                                 com_err(ctx->program_name, retval,
1464                                 _("while recovering ext3 journal of %s"),
1465                                         ctx->device_name);
1466                                 fatal_error(ctx, 0);
1467                         }
1468                         ext2fs_close(ctx->fs);
1469                         ctx->fs = 0;
1470                         ctx->flags |= E2F_FLAG_RESTARTED;
1471                         goto restart;
1472                 }
1473         }
1474
1475 skip_journal:
1476         /*
1477          * Check for compatibility with the feature sets.  We need to
1478          * be more stringent than ext2fs_open().
1479          */
1480         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1481         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1482         features[2] = (sb->s_feature_ro_compat &
1483                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1484 print_unsupp_features:
1485         if (features[0] || features[1] || features[2]) {
1486                 int     i, j;
1487                 __u32   *mask = features, m;
1488
1489                 log_err(ctx, _("%s has unsupported feature(s):"),
1490                         ctx->filesystem_name);
1491
1492                 for (i=0; i <3; i++,mask++) {
1493                         for (j=0,m=1; j < 32; j++, m<<=1) {
1494                                 if (*mask & m)
1495                                         log_err(ctx, " %s",
1496                                                 e2p_feature2string(i, m));
1497                         }
1498                 }
1499                 log_err(ctx, "\n");
1500                 goto get_newer;
1501         }
1502 #ifdef ENABLE_COMPRESSION
1503         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1504                 log_err(ctx, _("%s: warning: compression support "
1505                                "is experimental.\n"),
1506                         ctx->program_name);
1507 #endif
1508 #ifndef ENABLE_HTREE
1509         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1510                 log_err(ctx, _("%s: e2fsck not compiled with HTREE support,\n\t"
1511                           "but filesystem %s has HTREE directories.\n"),
1512                         ctx->program_name, ctx->device_name);
1513                 goto get_newer;
1514         }
1515 #endif
1516
1517         /*
1518          * If the user specified a specific superblock, presumably the
1519          * master superblock has been trashed.  So we mark the
1520          * superblock as dirty, so it can be written out.
1521          */
1522         if (ctx->superblock &&
1523             !(ctx->options & E2F_OPT_READONLY))
1524                 ext2fs_mark_super_dirty(fs);
1525
1526         /*
1527          * Calculate the number of filesystem blocks per pagesize.  If
1528          * fs->blocksize > page_size, set the number of blocks per
1529          * pagesize to 1 to avoid division by zero errors.
1530          */
1531 #ifdef _SC_PAGESIZE
1532         sysval = sysconf(_SC_PAGESIZE);
1533         if (sysval > 0)
1534                 sys_page_size = sysval;
1535 #endif /* _SC_PAGESIZE */
1536         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1537         if (ctx->blocks_per_page == 0)
1538                 ctx->blocks_per_page = 1;
1539
1540         if (ctx->superblock)
1541                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1542         ext2fs_mark_valid(fs);
1543         check_super_block(ctx);
1544         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1545                 fatal_error(ctx, 0);
1546         check_if_skip(ctx);
1547         check_resize_inode(ctx);
1548         if (bad_blocks_file)
1549                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1550         else if (cflag)
1551                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1552         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1553                 fatal_error(ctx, 0);
1554
1555         /*
1556          * Mark the system as valid, 'til proven otherwise
1557          */
1558         ext2fs_mark_valid(fs);
1559
1560         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1561         if (retval) {
1562                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1563                         ctx->program_name, error_message(retval));
1564                 preenhalt(ctx);
1565                 log_out(ctx, _("This doesn't bode well, "
1566                                "but we'll try to go on...\n"));
1567         }
1568
1569         /*
1570          * Save the journal size in megabytes.
1571          * Try and use the journal size from the backup else let e2fsck
1572          * find the default journal size.
1573          */
1574         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1575                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1576                                (sb->s_jnl_blocks[16] >> 20);
1577         else
1578                 journal_size = -1;
1579
1580         if (sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA) {
1581                 int qtype;
1582                 /* Quotas were enabled. Do quota accounting during fsck. */
1583                 if ((sb->s_usr_quota_inum && sb->s_grp_quota_inum) ||
1584                     (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum))
1585                         qtype = -1;
1586                 else
1587                         qtype = sb->s_usr_quota_inum ? USRQUOTA : GRPQUOTA;
1588
1589                 quota_init_context(&ctx->qctx, ctx->fs, qtype);
1590         }
1591
1592         run_result = e2fsck_run(ctx);
1593         e2fsck_clear_progbar(ctx);
1594
1595         if (ctx->flags & E2F_FLAG_JOURNAL_INODE) {
1596                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1597                         if (journal_size < 1024)
1598                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
1599                         if (journal_size < 0) {
1600                                 fs->super->s_feature_compat &=
1601                                         ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1602                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1603                                 log_out(ctx, "%s: Couldn't determine "
1604                                         "journal size\n", ctx->program_name);
1605                                 goto no_journal;
1606                         }
1607                         log_out(ctx, _("Creating journal (%d blocks): "),
1608                                journal_size);
1609                         fflush(stdout);
1610                         retval = ext2fs_add_journal_inode(fs,
1611                                                           journal_size, 0);
1612                         if (retval) {
1613                                 log_out(ctx, "%s: while trying to create "
1614                                         "journal\n", error_message(retval));
1615                                 goto no_journal;
1616                         }
1617                         log_out(ctx, _(" Done.\n"));
1618                         log_out(ctx, _("\n*** journal has been re-created - "
1619                                        "filesystem is now ext3 again ***\n"));
1620                 }
1621         }
1622 no_journal:
1623
1624         if (ctx->qctx) {
1625                 quota_write_inode(ctx->qctx, -1);
1626                 quota_release_context(&ctx->qctx);
1627         }
1628
1629         if (run_result == E2F_FLAG_RESTART) {
1630                 log_out(ctx, _("Restarting e2fsck from the beginning...\n"));
1631                 retval = e2fsck_reset_context(ctx);
1632                 if (retval) {
1633                         com_err(ctx->program_name, retval,
1634                                 _("while resetting context"));
1635                         fatal_error(ctx, 0);
1636                 }
1637                 ext2fs_close(fs);
1638                 goto restart;
1639         }
1640         if (run_result & E2F_FLAG_CANCEL) {
1641                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1642                         ctx->device_name : ctx->filesystem_name);
1643                 exit_value |= FSCK_CANCELED;
1644         }
1645         if (run_result & E2F_FLAG_ABORT)
1646                 fatal_error(ctx, _("aborted"));
1647         if (check_backup_super_block(ctx)) {
1648                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1649                 ext2fs_mark_super_dirty(fs);
1650         }
1651
1652 #ifdef MTRACE
1653         mtrace_print("Cleanup");
1654 #endif
1655         if (ext2fs_test_changed(fs)) {
1656                 exit_value |= FSCK_NONDESTRUCT;
1657                 if (!(ctx->options & E2F_OPT_PREEN))
1658                         log_out(ctx, _("\n%s: ***** FILE SYSTEM WAS "
1659                                        "MODIFIED *****\n"),
1660                                 ctx->device_name);
1661                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1662                         log_out(ctx, _("%s: ***** REBOOT LINUX *****\n"),
1663                                 ctx->device_name);
1664                         exit_value |= FSCK_REBOOT;
1665                 }
1666         }
1667         if (!ext2fs_test_valid(fs) ||
1668             ((exit_value & FSCK_CANCELED) &&
1669              (sb->s_state & EXT2_ERROR_FS))) {
1670                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
1671                                "errors **********\n\n"), ctx->device_name);
1672                 exit_value |= FSCK_UNCORRECTED;
1673                 exit_value &= ~FSCK_NONDESTRUCT;
1674         }
1675         if (exit_value & FSCK_CANCELED) {
1676                 int     allow_cancellation;
1677
1678                 profile_get_boolean(ctx->profile, "options",
1679                                     "allow_cancellation", 0, 0,
1680                                     &allow_cancellation);
1681                 exit_value &= ~FSCK_NONDESTRUCT;
1682                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1683                     (sb->s_state & EXT2_VALID_FS) &&
1684                     !(sb->s_state & EXT2_ERROR_FS))
1685                         exit_value = 0;
1686         } else {
1687                 show_stats(ctx);
1688                 if (!(ctx->options & E2F_OPT_READONLY)) {
1689                         if (ext2fs_test_valid(fs)) {
1690                                 if (!(sb->s_state & EXT2_VALID_FS))
1691                                         exit_value |= FSCK_NONDESTRUCT;
1692                                 sb->s_state = EXT2_VALID_FS;
1693                         } else
1694                                 sb->s_state &= ~EXT2_VALID_FS;
1695                         sb->s_mnt_count = 0;
1696                         if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
1697                                 sb->s_lastcheck = ctx->now;
1698                         memset(((char *) sb) + EXT4_S_ERR_START, 0,
1699                                EXT4_S_ERR_LEN);
1700                         ext2fs_mark_super_dirty(fs);
1701                 }
1702         }
1703
1704         if ((run_result & E2F_FLAG_CANCEL) == 0 &&
1705             sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM &&
1706             !(ctx->options & E2F_OPT_READONLY)) {
1707                 retval = ext2fs_set_gdt_csum(ctx->fs);
1708                 if (retval) {
1709                         com_err(ctx->program_name, retval,
1710                                 _("while setting block group checksum info"));
1711                         fatal_error(ctx, 0);
1712                 }
1713         }
1714
1715         e2fsck_write_bitmaps(ctx);
1716         io_channel_flush(ctx->fs->io);
1717         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
1718
1719         ext2fs_close(fs);
1720         ctx->fs = NULL;
1721         free(ctx->journal_name);
1722
1723         e2fsck_free_context(ctx);
1724         remove_error_table(&et_ext2_error_table);
1725         remove_error_table(&et_prof_error_table);
1726         return exit_value;
1727 }