misc/dumpe2fs.c

   1 /*
   2  * dumpe2fs.c           - List the control structures of a second
   3  *                        extended filesystem
   4  *
   5  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   6  *                                 Laboratoire MASI, Institut Blaise Pascal
   7  *                                 Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  * Copyright 1995, 1996, 1997 by Theodore Ts'o.
  10  *
  11  * %Begin-Header%
  12  * This file may be redistributed under the terms of the GNU Public
  13  * License.
  14  * %End-Header%
  15  */
  16
  17 /*
  18  * History:
  19  * 94/01/09     - Creation
  20  * 94/02/27     - Ported to use the ext2fs library
  21  */
  22
  23 #include "config.h"
  24 #ifdef HAVE_GETOPT_H
  25 #include <getopt.h>
  26 #else
  27 extern char *optarg;
  28 extern int optind;
  29 #endif
  30 #include <fcntl.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35
  36 #include "ext2fs/ext2_fs.h"
  37
  38 #include "ext2fs/ext2fs.h"
  39 #include "e2p/e2p.h"
  40 #include "ext2fs/kernel-jbd.h"
  41 #include <uuid/uuid.h>
  42
  43 #include "support/nls-enable.h"
  44 #include "support/plausible.h"
  45 #include "../version.h"
  46
  47 #define in_use(m, x)    (ext2fs_test_bit ((x), (m)))
  48
  49 static const char * program_name = "dumpe2fs";
  50 static char * device_name = NULL;
  51 static int hex_format = 0;
  52 static int blocks64 = 0;
  53
  54 static void usage(void)
  55 {
  56         fprintf(stderr, _("Usage: %s [-bfghimxV] [-o superblock=<num>] "
  57                  "[-o blocksize=<num>] device\n"), program_name);
  58         exit(1);
  59 }
  60
  61 static void print_number(unsigned long long num)
  62 {
  63         if (hex_format) {
  64                 if (blocks64)
  65                         printf("0x%08llx", num);
  66                 else
  67                         printf("0x%04llx", num);
  68         } else
  69                 printf("%llu", num);
  70 }
  71
  72 static void print_range(unsigned long long a, unsigned long long b)
  73 {
  74         if (hex_format) {
  75                 if (blocks64)
  76                         printf("0x%08llx-0x%08llx", a, b);
  77                 else
  78                         printf("0x%04llx-0x%04llx", a, b);
  79         } else
  80                 printf("%llu-%llu", a, b);
  81 }
  82
  83 static void print_free(unsigned long group, char * bitmap,
  84                        unsigned long num, unsigned long offset, int ratio)
  85 {
  86         int p = 0;
  87         unsigned long i;
  88         unsigned long j;
  89
  90         offset /= ratio;
  91         offset += group * num;
  92         for (i = 0; i < num; i++)
  93                 if (!in_use (bitmap, i))
  94                 {
  95                         if (p)
  96                                 printf (", ");
  97                         print_number((i + offset) * ratio);
  98                         for (j = i; j < num && !in_use (bitmap, j); j++)
  99                                 ;
 100                         if (--j != i) {
 101                                 fputc('-', stdout);
 102                                 print_number((j + offset) * ratio);
 103                                 i = j;
 104                         }
 105                         p = 1;
 106                 }
 107 }
 108
 109 static void print_bg_opt(int bg_flags, int mask,
 110                           const char *str, int *first)
 111 {
 112         if (bg_flags & mask) {
 113                 if (*first) {
 114                         fputs(" [", stdout);
 115                         *first = 0;
 116                 } else
 117                         fputs(", ", stdout);
 118                 fputs(str, stdout);
 119         }
 120 }
 121 static void print_bg_opts(ext2_filsys fs, dgrp_t i)
 122 {
 123         int first = 1, bg_flags = 0;
 124
 125         if (ext2fs_has_group_desc_csum(fs))
 126                 bg_flags = ext2fs_bg_flags(fs, i);
 127
 128         print_bg_opt(bg_flags, EXT2_BG_INODE_UNINIT, "INODE_UNINIT",
 129                      &first);
 130         print_bg_opt(bg_flags, EXT2_BG_BLOCK_UNINIT, "BLOCK_UNINIT",
 131                      &first);
 132         print_bg_opt(bg_flags, EXT2_BG_INODE_ZEROED, "ITABLE_ZEROED",
 133                      &first);
 134         if (!first)
 135                 fputc(']', stdout);
 136         fputc('\n', stdout);
 137 }
 138
 139 static void print_bg_rel_offset(ext2_filsys fs, blk64_t block, int itable,
 140                                 blk64_t first_block, blk64_t last_block)
 141 {
 142         if ((block >= first_block) && (block <= last_block)) {
 143                 if (itable && block == first_block)
 144                         return;
 145                 printf(" (+%u)", (unsigned)(block - first_block));
 146         } else if (ext2fs_has_feature_flex_bg(fs->super)) {
 147                 dgrp_t flex_grp = ext2fs_group_of_blk2(fs, block);
 148                 printf(" (bg #%u + %u)", flex_grp,
 149                        (unsigned)(block-ext2fs_group_first_block2(fs,flex_grp)));
 150         }
 151 }
 152
 153 static void list_desc(ext2_filsys fs, int grp_only)
 154 {
 155         unsigned long i;
 156         blk64_t first_block, last_block;
 157         blk64_t super_blk, old_desc_blk, new_desc_blk;
 158         char *block_bitmap=NULL, *inode_bitmap=NULL;
 159         const char *units = _("blocks");
 160         int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
 161         int             block_nbytes, inode_nbytes;
 162         int has_super;
 163         blk64_t         blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
 164         ext2_ino_t      ino_itr = 1;
 165         errcode_t       retval;
 166
 167         if (ext2fs_has_feature_bigalloc(fs->super))
 168                 units = _("clusters");
 169
 170         block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
 171         inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
 172
 173         if (fs->block_map)
 174                 block_bitmap = malloc(block_nbytes);
 175         if (fs->inode_map)
 176                 inode_bitmap = malloc(inode_nbytes);
 177
 178         inode_blocks_per_group = ((fs->super->s_inodes_per_group *
 179                                    EXT2_INODE_SIZE(fs->super)) +
 180                                   EXT2_BLOCK_SIZE(fs->super) - 1) /
 181                                  EXT2_BLOCK_SIZE(fs->super);
 182         reserved_gdt = fs->super->s_reserved_gdt_blocks;
 183         fputc('\n', stdout);
 184         first_block = fs->super->s_first_data_block;
 185         if (ext2fs_has_feature_meta_bg(fs->super))
 186                 old_desc_blocks = fs->super->s_first_meta_bg;
 187         else
 188                 old_desc_blocks = fs->desc_blocks;
 189         if (grp_only)
 190                 printf("group:block:super:gdt:bbitmap:ibitmap:itable\n");
 191         for (i = 0; i < fs->group_desc_count; i++) {
 192                 first_block = ext2fs_group_first_block2(fs, i);
 193                 last_block = ext2fs_group_last_block2(fs, i);
 194
 195                 ext2fs_super_and_bgd_loc2(fs, i, &super_blk,
 196                                           &old_desc_blk, &new_desc_blk, 0);
 197
 198                 if (grp_only) {
 199                         printf("%lu:%llu:", i, (unsigned long long) first_block);
 200                         if (i == 0 || super_blk)
 201                                 printf("%llu:", (unsigned long long) super_blk);
 202                         else
 203                                 printf("-1:");
 204                         if (old_desc_blk) {
 205                                 print_range(old_desc_blk,
 206                                             old_desc_blk + old_desc_blocks - 1);
 207                                 printf(":");
 208                         } else if (new_desc_blk)
 209                                 printf("%llu:", (unsigned long long) new_desc_blk);
 210                         else
 211                                 printf("-1:");
 212                         printf("%llu:%llu:%llu\n",
 213                                (unsigned long long) ext2fs_block_bitmap_loc(fs, i),
 214                                (unsigned long long) ext2fs_inode_bitmap_loc(fs, i),
 215                                (unsigned long long) ext2fs_inode_table_loc(fs, i));
 216                         continue;
 217                 }
 218
 219                 printf(_("Group %lu: (Blocks "), i);
 220                 print_range(first_block, last_block);
 221                 fputs(")", stdout);
 222                 if (ext2fs_has_group_desc_csum(fs)) {
 223                         unsigned csum = ext2fs_bg_checksum(fs, i);
 224                         unsigned exp_csum = ext2fs_group_desc_csum(fs, i);
 225
 226                         printf(_(" csum 0x%04x"), csum);
 227                         if (csum != exp_csum)
 228                                 printf(_(" (EXPECTED 0x%04x)"), exp_csum);
 229                 }
 230                 print_bg_opts(fs, i);
 231                 has_super = ((i==0) || super_blk);
 232                 if (has_super) {
 233                         printf (_("  %s superblock at "),
 234                                 i == 0 ? _("Primary") : _("Backup"));
 235                         print_number(super_blk);
 236                 }
 237                 if (old_desc_blk) {
 238                         printf("%s", _(", Group descriptors at "));
 239                         print_range(old_desc_blk,
 240                                     old_desc_blk + old_desc_blocks - 1);
 241                         if (reserved_gdt) {
 242                                 printf("%s", _("\n  Reserved GDT blocks at "));
 243                                 print_range(old_desc_blk + old_desc_blocks,
 244                                             old_desc_blk + old_desc_blocks +
 245                                             reserved_gdt - 1);
 246                         }
 247                 } else if (new_desc_blk) {
 248                         fputc(has_super ? ',' : ' ', stdout);
 249                         printf("%s", _(" Group descriptor at "));
 250                         print_number(new_desc_blk);
 251                         has_super++;
 252                 }
 253                 if (has_super)
 254                         fputc('\n', stdout);
 255                 fputs(_("  Block bitmap at "), stdout);
 256                 print_number(ext2fs_block_bitmap_loc(fs, i));
 257                 print_bg_rel_offset(fs, ext2fs_block_bitmap_loc(fs, i), 0,
 258                                     first_block, last_block);
 259                 if (ext2fs_has_feature_metadata_csum(fs->super))
 260                         printf(_(", csum 0x%08x"),
 261                                ext2fs_block_bitmap_checksum(fs, i));
 262                 if (getenv("DUMPE2FS_IGNORE_80COL"))
 263                         fputs(_(","), stdout);
 264                 else
 265                         fputs(_("\n "), stdout);
 266                 fputs(_(" Inode bitmap at "), stdout);
 267                 print_number(ext2fs_inode_bitmap_loc(fs, i));
 268                 print_bg_rel_offset(fs, ext2fs_inode_bitmap_loc(fs, i), 0,
 269                                     first_block, last_block);
 270                 if (ext2fs_has_feature_metadata_csum(fs->super))
 271                         printf(_(", csum 0x%08x"),
 272                                ext2fs_inode_bitmap_checksum(fs, i));
 273                 fputs(_("\n  Inode table at "), stdout);
 274                 print_range(ext2fs_inode_table_loc(fs, i),
 275                             ext2fs_inode_table_loc(fs, i) +
 276                             inode_blocks_per_group - 1);
 277                 print_bg_rel_offset(fs, ext2fs_inode_table_loc(fs, i), 1,
 278                                     first_block, last_block);
 279                 printf (_("\n  %u free %s, %u free inodes, "
 280                           "%u directories%s"),
 281                         ext2fs_bg_free_blocks_count(fs, i), units,
 282                         ext2fs_bg_free_inodes_count(fs, i),
 283                         ext2fs_bg_used_dirs_count(fs, i),
 284                         ext2fs_bg_itable_unused(fs, i) ? "" : "\n");
 285                 if (ext2fs_bg_itable_unused(fs, i))
 286                         printf (_(", %u unused inodes\n"),
 287                                 ext2fs_bg_itable_unused(fs, i));
 288                 if (block_bitmap) {
 289                         fputs(_("  Free blocks: "), stdout);
 290                         retval = ext2fs_get_block_bitmap_range2(fs->block_map,
 291                                  blk_itr, block_nbytes << 3, block_bitmap);
 292                         if (retval)
 293                                 com_err("list_desc", retval,
 294                                         "while reading block bitmap");
 295                         else
 296                                 print_free(i, block_bitmap,
 297                                            fs->super->s_clusters_per_group,
 298                                            fs->super->s_first_data_block,
 299                                            EXT2FS_CLUSTER_RATIO(fs));
 300                         fputc('\n', stdout);
 301                         blk_itr += fs->super->s_clusters_per_group;
 302                 }
 303                 if (inode_bitmap) {
 304                         fputs(_("  Free inodes: "), stdout);
 305                         retval = ext2fs_get_inode_bitmap_range2(fs->inode_map,
 306                                  ino_itr, inode_nbytes << 3, inode_bitmap);
 307                         if (retval)
 308                                 com_err("list_desc", retval,
 309                                         "while reading inode bitmap");
 310                         else
 311                                 print_free(i, inode_bitmap,
 312                                            fs->super->s_inodes_per_group,
 313                                            1, 1);
 314                         fputc('\n', stdout);
 315                         ino_itr += fs->super->s_inodes_per_group;
 316                 }
 317         }
 318         if (block_bitmap)
 319                 free(block_bitmap);
 320         if (inode_bitmap)
 321                 free(inode_bitmap);
 322 }
 323
 324 static void list_bad_blocks(ext2_filsys fs, int dump)
 325 {
 326         badblocks_list          bb_list = 0;
 327         badblocks_iterate       bb_iter;
 328         blk_t                   blk;
 329         errcode_t               retval;
 330         const char              *header, *fmt;
 331
 332         retval = ext2fs_read_bb_inode(fs, &bb_list);
 333         if (retval) {
 334                 com_err("ext2fs_read_bb_inode", retval, 0);
 335                 return;
 336         }
 337         retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
 338         if (retval) {
 339                 com_err("ext2fs_badblocks_list_iterate_begin", retval,
 340                         "%s", _("while printing bad block list"));
 341                 return;
 342         }
 343         if (dump) {
 344                 header = fmt = "%u\n";
 345         } else {
 346                 header =  _("Bad blocks: %u");
 347                 fmt = ", %u";
 348         }
 349         while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
 350                 printf(header ? header : fmt, blk);
 351                 header = 0;
 352         }
 353         ext2fs_badblocks_list_iterate_end(bb_iter);
 354         if (!dump)
 355                 fputc('\n', stdout);
 356         ext2fs_badblocks_list_free(bb_list);
 357 }
 358
 359 static void print_inline_journal_information(ext2_filsys fs)
 360 {
 361         journal_superblock_t    *jsb;
 362         struct ext2_inode       inode;
 363         ext2_file_t             journal_file;
 364         errcode_t               retval;
 365         ext2_ino_t              ino = fs->super->s_journal_inum;
 366         char                    buf[1024];
 367         int                     flags;
 368
 369         if (fs->flags & EXT2_FLAG_IMAGE_FILE)
 370                 return;
 371         retval = ext2fs_read_inode(fs, ino,  &inode);
 372         if (retval) {
 373                 com_err(program_name, retval, "%s",
 374                         _("while reading journal inode"));
 375                 exit(1);
 376         }
 377         retval = ext2fs_file_open2(fs, ino, &inode, 0, &journal_file);
 378         if (retval) {
 379                 com_err(program_name, retval, "%s",
 380                         _("while opening journal inode"));
 381                 exit(1);
 382         }
 383         retval = ext2fs_file_read(journal_file, buf, sizeof(buf), 0);
 384         if (retval) {
 385                 com_err(program_name, retval, "%s",
 386                         _("while reading journal super block"));
 387                 exit(1);
 388         }
 389         ext2fs_file_close(journal_file);
 390         jsb = (journal_superblock_t *) buf;
 391         if (be32_to_cpu(jsb->s_header.h_magic) != JBD2_MAGIC_NUMBER) {
 392                 fprintf(stderr, "%s",
 393                         _("Journal superblock magic number invalid!\n"));
 394                 exit(1);
 395         }
 396         flags = ext2fs_has_feature_fast_commit(fs->super) ?
 397                         E2P_LIST_JOURNAL_FLAG_FC : 0;
 398         e2p_list_journal_super(stdout, buf, fs->blocksize, flags);
 399 }
 400
 401 static void print_journal_information(ext2_filsys fs)
 402 {
 403         errcode_t       retval;
 404         char            buf[1024];
 405         journal_superblock_t    *jsb;
 406         int             flags;
 407
 408         /* Get the journal superblock */
 409         if ((retval = io_channel_read_blk64(fs->io,
 410                                             fs->super->s_first_data_block + 1,
 411                                             -1024, buf))) {
 412                 com_err(program_name, retval, "%s",
 413                         _("while reading journal superblock"));
 414                 exit(1);
 415         }
 416         jsb = (journal_superblock_t *) buf;
 417         if ((jsb->s_header.h_magic != (unsigned) ntohl(JBD2_MAGIC_NUMBER)) ||
 418             (jsb->s_header.h_blocktype !=
 419              (unsigned) ntohl(JBD2_SUPERBLOCK_V2))) {
 420                 com_err(program_name, 0, "%s",
 421                         _("Couldn't find journal superblock magic numbers"));
 422                 exit(1);
 423         }
 424         flags = ext2fs_has_feature_fast_commit(fs->super) ?
 425                         E2P_LIST_JOURNAL_FLAG_FC : 0;
 426         e2p_list_journal_super(stdout, buf, fs->blocksize, flags);
 427 }
 428
 429 static int check_mmp(ext2_filsys fs)
 430 {
 431         int retval;
 432
 433         /* This won't actually start MMP on the filesystem, since fs is opened
 434          * readonly, but it will do the proper activity checking for us. */
 435         retval = ext2fs_mmp_start(fs);
 436         if (retval) {
 437                 com_err(program_name, retval, _("while trying to open %s"),
 438                         fs->device_name);
 439                 if (retval == EXT2_ET_MMP_FAILED ||
 440                     retval == EXT2_ET_MMP_FSCK_ON ||
 441                     retval == EXT2_ET_MMP_CSUM_INVALID ||
 442                     retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
 443                         if (fs->mmp_buf) {
 444                                 struct mmp_struct *mmp = fs->mmp_buf;
 445                                 time_t mmp_time = mmp->mmp_time;
 446
 447                                 fprintf(stderr,
 448                                         "%s: MMP update by '%.*s%.*s' at %s",
 449                                         program_name,
 450                                         EXT2_LEN_STR(mmp->mmp_nodename),
 451                                         EXT2_LEN_STR(mmp->mmp_bdevname),
 452                                         ctime(&mmp_time));
 453                         }
 454                         retval = 1;
 455                 } else {
 456                         retval = 2;
 457                 }
 458         } else {
 459                 printf("%s: it is safe to mount '%s', MMP is clean\n",
 460                        program_name, fs->device_name);
 461         }
 462
 463         return retval;
 464 }
 465
 466 static void print_mmp_block(ext2_filsys fs)
 467 {
 468         struct mmp_struct *mmp;
 469         time_t mmp_time;
 470         errcode_t retval;
 471
 472         if (fs->mmp_buf == NULL) {
 473                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
 474                 if (retval) {
 475                         com_err(program_name, retval,
 476                                 _("failed to alloc MMP buffer\n"));
 477                         return;
 478                 }
 479         }
 480
 481         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
 482         /* this is only dumping, not checking status, so OK to skip this */
 483         if (retval == EXT2_ET_OP_NOT_SUPPORTED)
 484                 return;
 485         if (retval) {
 486                 com_err(program_name, retval,
 487                         _("reading MMP block %llu from '%s'\n"),
 488                         (unsigned long long) fs->super->s_mmp_block,
 489                         fs->device_name);
 490                 return;
 491         }
 492
 493         mmp = fs->mmp_buf;
 494         mmp_time = mmp->mmp_time;
 495         printf("MMP_block:\n");
 496         printf("    mmp_magic: 0x%x\n", mmp->mmp_magic);
 497         printf("    mmp_check_interval: %d\n", mmp->mmp_check_interval);
 498         printf("    mmp_sequence: %#08x\n", mmp->mmp_seq);
 499         printf("    mmp_update_date: %s", ctime(&mmp_time));
 500         printf("    mmp_update_time: %llu\n",
 501                (unsigned long long) mmp->mmp_time);
 502         printf("    mmp_node_name: %.*s\n",
 503                EXT2_LEN_STR(mmp->mmp_nodename));
 504         printf("    mmp_device_name: %.*s\n",
 505                EXT2_LEN_STR(mmp->mmp_bdevname));
 506 }
 507
 508 static void parse_extended_opts(const char *opts, blk64_t *superblock,
 509                                 int *blocksize)
 510 {
 511         char    *buf, *token, *next, *p, *arg, *badopt = 0;
 512         int     len;
 513         int     do_usage = 0;
 514
 515         len = strlen(opts);
 516         buf = malloc(len+1);
 517         if (!buf) {
 518                 fprintf(stderr, "%s",
 519                         _("Couldn't allocate memory to parse options!\n"));
 520                 exit(1);
 521         }
 522         strcpy(buf, opts);
 523         for (token = buf; token && *token; token = next) {
 524                 p = strchr(token, ',');
 525                 next = 0;
 526                 if (p) {
 527                         *p = 0;
 528                         next = p+1;
 529                 }
 530                 arg = strchr(token, '=');
 531                 if (arg) {
 532                         *arg = 0;
 533                         arg++;
 534                 }
 535                 if (strcmp(token, "superblock") == 0 ||
 536                     strcmp(token, "sb") == 0) {
 537                         if (!arg) {
 538                                 do_usage++;
 539                                 badopt = token;
 540                                 continue;
 541                         }
 542                         *superblock = strtoul(arg, &p, 0);
 543                         if (*p) {
 544                                 fprintf(stderr,
 545                                         _("Invalid superblock parameter: %s\n"),
 546                                         arg);
 547                                 do_usage++;
 548                                 continue;
 549                         }
 550                 } else if (strcmp(token, "blocksize") == 0 ||
 551                            strcmp(token, "bs") == 0) {
 552                         if (!arg) {
 553                                 do_usage++;
 554                                 badopt = token;
 555                                 continue;
 556                         }
 557                         *blocksize = strtoul(arg, &p, 0);
 558                         if (*p) {
 559                                 fprintf(stderr,
 560                                         _("Invalid blocksize parameter: %s\n"),
 561                                         arg);
 562                                 do_usage++;
 563                                 continue;
 564                         }
 565                 } else {
 566                         do_usage++;
 567                         badopt = token;
 568                 }
 569         }
 570         if (do_usage) {
 571                 fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n"
 572                         "Extended options are separated by commas, "
 573                         "and may take an argument which\n"
 574                         "\tis set off by an equals ('=') sign.\n\n"
 575                         "Valid extended options are:\n"
 576                         "\tsuperblock=<superblock number>\n"
 577                         "\tblocksize=<blocksize>\n"),
 578                         badopt ? badopt : "");
 579                 free(buf);
 580                 exit(1);
 581         }
 582         free(buf);
 583 }
 584
 585 int main (int argc, char ** argv)
 586 {
 587         errcode_t       retval;
 588         errcode_t       retval_csum = 0;
 589         const char      *error_csum = NULL;
 590         ext2_filsys     fs;
 591         int             print_badblocks = 0;
 592         blk64_t         use_superblock = 0;
 593         int             use_blocksize = 0;
 594         int             image_dump = 0;
 595         int             mmp_check = 0;
 596         int             mmp_info = 0;
 597         int             force = 0;
 598         int             flags;
 599         int             header_only = 0;
 600         int             c;
 601         int             grp_only = 0;
 602
 603 #ifdef ENABLE_NLS
 604         setlocale(LC_MESSAGES, "");
 605         setlocale(LC_CTYPE, "");
 606         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 607         textdomain(NLS_CAT_NAME);
 608         set_com_err_gettext(gettext);
 609 #endif
 610         add_error_table(&et_ext2_error_table);
 611         if (argc && *argv) {
 612                 if (strrchr(*argv, '/'))
 613                         program_name = strrchr(*argv, '/') + 1;
 614                 else
 615                         program_name = *argv;
 616
 617                 if (strstr(program_name, "mmpstatus") != NULL) {
 618                         mmp_check = 1;
 619                         header_only = 1;
 620                 }
 621         }
 622
 623         if (!mmp_check)
 624                 fprintf(stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
 625                         E2FSPROGS_DATE);
 626
 627         while ((c = getopt(argc, argv, "bfghimxVo:")) != EOF) {
 628                 switch (c) {
 629                 case 'b':
 630                         print_badblocks++;
 631                         break;
 632                 case 'f':
 633                         force++;
 634                         break;
 635                 case 'g':
 636                         grp_only++;
 637                         break;
 638                 case 'h':
 639                         header_only++;
 640                         break;
 641                 case 'i':
 642                         if (mmp_check)
 643                                 mmp_info++;
 644                         else
 645                                 image_dump++;
 646                         break;
 647                 case 'm':
 648                         mmp_check++;
 649                         header_only++;
 650                         if (image_dump) {
 651                                 mmp_info = image_dump;
 652                                 image_dump = 0;
 653                         }
 654                         break;
 655                 case 'o':
 656                         parse_extended_opts(optarg, &use_superblock,
 657                                             &use_blocksize);
 658                         break;
 659                 case 'V':
 660                         /* Print version number and exit */
 661                         fprintf(stderr, _("\tUsing %s\n"),
 662                                 error_message(EXT2_ET_BASE));
 663                         exit(0);
 664                 case 'x':
 665                         hex_format++;
 666                         break;
 667                 default:
 668                         usage();
 669                 }
 670         }
 671         if (optind != argc - 1)
 672                 usage();
 673
 674         device_name = argv[optind++];
 675         flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES |
 676                 EXT2_FLAG_64BITS | EXT2_FLAG_THREADS;
 677         if (force)
 678                 flags |= EXT2_FLAG_FORCE;
 679         if (image_dump)
 680                 flags |= EXT2_FLAG_IMAGE_FILE;
 681         if (header_only)
 682                 flags |= EXT2_FLAG_SUPER_ONLY;
 683 try_open_again:
 684         if (use_superblock && !use_blocksize) {
 685                 for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
 686                      use_blocksize <= EXT2_MAX_BLOCK_SIZE;
 687                      use_blocksize *= 2) {
 688                         retval = ext2fs_open (device_name, flags,
 689                                               use_superblock,
 690                                               use_blocksize, unix_io_manager,
 691                                               &fs);
 692                         if (!retval)
 693                                 break;
 694                 }
 695         } else {
 696                 retval = ext2fs_open(device_name, flags, use_superblock,
 697                                      use_blocksize, unix_io_manager, &fs);
 698         }
 699         flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 700         if (retval && !retval_csum) {
 701                 retval_csum = retval;
 702                 error_csum = _("while trying to open %s");
 703                 goto try_open_again;
 704         }
 705         if (retval) {
 706                 com_err(program_name, retval, _("while trying to open %s"),
 707                         device_name);
 708                 printf("%s", _("Couldn't find valid filesystem superblock.\n"));
 709                 if (retval == EXT2_ET_BAD_MAGIC)
 710                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
 711                 goto out;
 712         }
 713         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
 714         if (ext2fs_has_feature_64bit(fs->super))
 715                 blocks64 = 1;
 716         if (mmp_check) {
 717                 if (ext2fs_has_feature_mmp(fs->super) &&
 718                     fs->super->s_mmp_block != 0) {
 719                         if (mmp_info) {
 720                                 print_mmp_block(fs);
 721                                 printf("    mmp_block_number: ");
 722                                 print_number(fs->super->s_mmp_block);
 723                                 printf("\n");
 724                         } else {
 725                                 retval = check_mmp(fs);
 726                         }
 727                         if (!retval && retval_csum)
 728                                 retval = 2;
 729                 } else {
 730                         fprintf(stderr, _("%s: MMP feature not enabled.\n"),
 731                                 program_name);
 732                         retval = 2;
 733                 }
 734         } else if (print_badblocks) {
 735                 list_bad_blocks(fs, 1);
 736         } else {
 737                 if (grp_only)
 738                         goto just_descriptors;
 739                 list_super(fs->super);
 740                 if (ext2fs_has_feature_journal_dev(fs->super)) {
 741                         print_journal_information(fs);
 742
 743                         goto out_close;
 744                 }
 745                 if (ext2fs_has_feature_journal(fs->super) &&
 746                     (fs->super->s_journal_inum != 0))
 747                         print_inline_journal_information(fs);
 748                 if (ext2fs_has_feature_mmp(fs->super) &&
 749                     fs->super->s_mmp_block != 0)
 750                         print_mmp_block(fs);
 751                 list_bad_blocks(fs, 0);
 752                 if (header_only)
 753                         goto out_close;
 754
 755                 fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 756 try_bitmaps_again:
 757                 retval = ext2fs_read_bitmaps(fs);
 758                 if (retval && !retval_csum) {
 759                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 760                         retval_csum = retval;
 761                         error_csum = _("while trying to read '%s' bitmaps\n");
 762                         goto try_bitmaps_again;
 763                 }
 764 just_descriptors:
 765                 list_desc(fs, grp_only);
 766         }
 767 out_close:
 768         if (retval_csum) {
 769                 com_err(program_name, retval_csum, error_csum, device_name);
 770                 printf("%s", _("*** Run e2fsck now!\n\n"));
 771                 if (!retval)
 772                         retval = retval_csum;
 773         }
 774         ext2fs_close_free(&fs);
 775         remove_error_table(&et_ext2_error_table);
 776 out:
 777         return retval;
 778 }