• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
usage(void)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 
print_number(unsigned long long num)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 
print_range(unsigned long long a,unsigned long long b)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 
print_free(unsigned long group,char * bitmap,unsigned long num,unsigned long offset,int ratio)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 
print_bg_opt(int bg_flags,int mask,const char * str,int * first)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 }
print_bg_opts(ext2_filsys fs,dgrp_t i)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 
print_bg_rel_offset(ext2_filsys fs,blk64_t block,int itable,blk64_t first_block,blk64_t last_block)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 
list_desc(ext2_filsys fs,int grp_only)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, first_block);
200 			if (i == 0 || super_blk)
201 				printf("%llu:", 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:", new_desc_blk);
210 			else
211 				printf("-1:");
212 			printf("%llu:%llu:%llu\n",
213 			       ext2fs_block_bitmap_loc(fs, i),
214 			       ext2fs_inode_bitmap_loc(fs, i),
215 			       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 
list_bad_blocks(ext2_filsys fs,int dump)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 
print_inline_journal_information(ext2_filsys fs)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 	ino_t			ino = fs->super->s_journal_inum;
366 	char			buf[1024];
367 
368 	if (fs->flags & EXT2_FLAG_IMAGE_FILE)
369 		return;
370 	retval = ext2fs_read_inode(fs, ino,  &inode);
371 	if (retval) {
372 		com_err(program_name, retval, "%s",
373 			_("while reading journal inode"));
374 		exit(1);
375 	}
376 	retval = ext2fs_file_open2(fs, ino, &inode, 0, &journal_file);
377 	if (retval) {
378 		com_err(program_name, retval, "%s",
379 			_("while opening journal inode"));
380 		exit(1);
381 	}
382 	retval = ext2fs_file_read(journal_file, buf, sizeof(buf), 0);
383 	if (retval) {
384 		com_err(program_name, retval, "%s",
385 			_("while reading journal super block"));
386 		exit(1);
387 	}
388 	ext2fs_file_close(journal_file);
389 	jsb = (journal_superblock_t *) buf;
390 	if (be32_to_cpu(jsb->s_header.h_magic) != JFS_MAGIC_NUMBER) {
391 		fprintf(stderr, "%s",
392 			_("Journal superblock magic number invalid!\n"));
393 		exit(1);
394 	}
395 	e2p_list_journal_super(stdout, buf, fs->blocksize, 0);
396 }
397 
print_journal_information(ext2_filsys fs)398 static void print_journal_information(ext2_filsys fs)
399 {
400 	errcode_t	retval;
401 	char		buf[1024];
402 	journal_superblock_t	*jsb;
403 
404 	/* Get the journal superblock */
405 	if ((retval = io_channel_read_blk64(fs->io,
406 					    fs->super->s_first_data_block + 1,
407 					    -1024, buf))) {
408 		com_err(program_name, retval, "%s",
409 			_("while reading journal superblock"));
410 		exit(1);
411 	}
412 	jsb = (journal_superblock_t *) buf;
413 	if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
414 	    (jsb->s_header.h_blocktype !=
415 	     (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
416 		com_err(program_name, 0, "%s",
417 			_("Couldn't find journal superblock magic numbers"));
418 		exit(1);
419 	}
420 	e2p_list_journal_super(stdout, buf, fs->blocksize, 0);
421 }
422 
check_mmp(ext2_filsys fs)423 static int check_mmp(ext2_filsys fs)
424 {
425 	int retval;
426 
427 	/* This won't actually start MMP on the filesystem, since fs is opened
428 	 * readonly, but it will do the proper activity checking for us. */
429 	retval = ext2fs_mmp_start(fs);
430 	if (retval) {
431 		com_err(program_name, retval, _("while trying to open %s"),
432 			fs->device_name);
433 		if (retval == EXT2_ET_MMP_FAILED ||
434 		    retval == EXT2_ET_MMP_FSCK_ON ||
435 		    retval == EXT2_ET_MMP_CSUM_INVALID ||
436 		    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
437 			if (fs->mmp_buf) {
438 				struct mmp_struct *mmp = fs->mmp_buf;
439 				time_t mmp_time = mmp->mmp_time;
440 
441 				fprintf(stderr,
442 					"%s: MMP last updated by '%s' on %s",
443 					program_name, mmp->mmp_nodename,
444 					ctime(&mmp_time));
445 			}
446 			retval = 1;
447 		} else {
448 			retval = 2;
449 		}
450 	} else {
451 		printf("%s: it is safe to mount '%s', MMP is clean\n",
452 		       program_name, fs->device_name);
453 	}
454 
455 	return retval;
456 }
457 
print_mmp_block(ext2_filsys fs)458 static void print_mmp_block(ext2_filsys fs)
459 {
460 	struct mmp_struct *mmp;
461 	time_t mmp_time;
462 	errcode_t retval;
463 
464 	if (fs->mmp_buf == NULL) {
465 		retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
466 		if (retval) {
467 			com_err(program_name, retval,
468 				_("failed to alloc MMP buffer\n"));
469 			return;
470 		}
471 	}
472 
473 	retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
474 	/* this is only dumping, not checking status, so OK to skip this */
475 	if (retval == EXT2_ET_OP_NOT_SUPPORTED)
476 		return;
477 	if (retval) {
478 		com_err(program_name, retval,
479 			_("reading MMP block %llu from '%s'\n"),
480 			fs->super->s_mmp_block, fs->device_name);
481 		return;
482 	}
483 
484 	mmp = fs->mmp_buf;
485 	mmp_time = mmp->mmp_time;
486 	printf("MMP_block:\n");
487 	printf("    mmp_magic: 0x%x\n", mmp->mmp_magic);
488 	printf("    mmp_check_interval: %d\n", mmp->mmp_check_interval);
489 	printf("    mmp_sequence: %#08x\n", mmp->mmp_seq);
490 	printf("    mmp_update_date: %s", ctime(&mmp_time));
491 	printf("    mmp_update_time: %lld\n", mmp->mmp_time);
492 	printf("    mmp_node_name: %s\n", mmp->mmp_nodename);
493 	printf("    mmp_device_name: %s\n", mmp->mmp_bdevname);
494 }
495 
parse_extended_opts(const char * opts,blk64_t * superblock,int * blocksize)496 static void parse_extended_opts(const char *opts, blk64_t *superblock,
497 				int *blocksize)
498 {
499 	char	*buf, *token, *next, *p, *arg, *badopt = 0;
500 	int	len;
501 	int	do_usage = 0;
502 
503 	len = strlen(opts);
504 	buf = malloc(len+1);
505 	if (!buf) {
506 		fprintf(stderr, "%s",
507 			_("Couldn't allocate memory to parse options!\n"));
508 		exit(1);
509 	}
510 	strcpy(buf, opts);
511 	for (token = buf; token && *token; token = next) {
512 		p = strchr(token, ',');
513 		next = 0;
514 		if (p) {
515 			*p = 0;
516 			next = p+1;
517 		}
518 		arg = strchr(token, '=');
519 		if (arg) {
520 			*arg = 0;
521 			arg++;
522 		}
523 		if (strcmp(token, "superblock") == 0 ||
524 		    strcmp(token, "sb") == 0) {
525 			if (!arg) {
526 				do_usage++;
527 				badopt = token;
528 				continue;
529 			}
530 			*superblock = strtoul(arg, &p, 0);
531 			if (*p) {
532 				fprintf(stderr,
533 					_("Invalid superblock parameter: %s\n"),
534 					arg);
535 				do_usage++;
536 				continue;
537 			}
538 		} else if (strcmp(token, "blocksize") == 0 ||
539 			   strcmp(token, "bs") == 0) {
540 			if (!arg) {
541 				do_usage++;
542 				badopt = token;
543 				continue;
544 			}
545 			*blocksize = strtoul(arg, &p, 0);
546 			if (*p) {
547 				fprintf(stderr,
548 					_("Invalid blocksize parameter: %s\n"),
549 					arg);
550 				do_usage++;
551 				continue;
552 			}
553 		} else {
554 			do_usage++;
555 			badopt = token;
556 		}
557 	}
558 	if (do_usage) {
559 		fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n"
560 			"Extended options are separated by commas, "
561 			"and may take an argument which\n"
562 			"\tis set off by an equals ('=') sign.\n\n"
563 			"Valid extended options are:\n"
564 			"\tsuperblock=<superblock number>\n"
565 			"\tblocksize=<blocksize>\n"),
566 			badopt ? badopt : "");
567 		free(buf);
568 		exit(1);
569 	}
570 	free(buf);
571 }
572 
main(int argc,char ** argv)573 int main (int argc, char ** argv)
574 {
575 	errcode_t	retval;
576 	errcode_t	retval_csum = 0;
577 	const char	*error_csum = NULL;
578 	ext2_filsys	fs;
579 	int		print_badblocks = 0;
580 	blk64_t		use_superblock = 0;
581 	int		use_blocksize = 0;
582 	int		image_dump = 0;
583 	int		mmp_check = 0;
584 	int		mmp_info = 0;
585 	int		force = 0;
586 	int		flags;
587 	int		header_only = 0;
588 	int		c;
589 	int		grp_only = 0;
590 
591 #ifdef ENABLE_NLS
592 	setlocale(LC_MESSAGES, "");
593 	setlocale(LC_CTYPE, "");
594 	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
595 	textdomain(NLS_CAT_NAME);
596 	set_com_err_gettext(gettext);
597 #endif
598 	add_error_table(&et_ext2_error_table);
599 	if (argc && *argv) {
600 		if (strrchr(*argv, '/'))
601 			program_name = strrchr(*argv, '/') + 1;
602 		else
603 			program_name = *argv;
604 
605 		if (strstr(program_name, "mmpstatus") != NULL) {
606 			mmp_check = 1;
607 			header_only = 1;
608 		}
609 	}
610 
611 	if (!mmp_check)
612 		fprintf(stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
613 			E2FSPROGS_DATE);
614 
615 	while ((c = getopt(argc, argv, "bfghimxVo:")) != EOF) {
616 		switch (c) {
617 		case 'b':
618 			print_badblocks++;
619 			break;
620 		case 'f':
621 			force++;
622 			break;
623 		case 'g':
624 			grp_only++;
625 			break;
626 		case 'h':
627 			header_only++;
628 			break;
629 		case 'i':
630 			if (mmp_check)
631 				mmp_info++;
632 			else
633 				image_dump++;
634 			break;
635 		case 'm':
636 			mmp_check++;
637 			header_only++;
638 			if (image_dump) {
639 				mmp_info = image_dump;
640 				image_dump = 0;
641 			}
642 			break;
643 		case 'o':
644 			parse_extended_opts(optarg, &use_superblock,
645 					    &use_blocksize);
646 			break;
647 		case 'V':
648 			/* Print version number and exit */
649 			fprintf(stderr, _("\tUsing %s\n"),
650 				error_message(EXT2_ET_BASE));
651 			exit(0);
652 		case 'x':
653 			hex_format++;
654 			break;
655 		default:
656 			usage();
657 		}
658 	}
659 	if (optind != argc - 1)
660 		usage();
661 
662 	device_name = argv[optind++];
663 	flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES |
664 		EXT2_FLAG_64BITS;
665 	if (force)
666 		flags |= EXT2_FLAG_FORCE;
667 	if (image_dump)
668 		flags |= EXT2_FLAG_IMAGE_FILE;
669 try_open_again:
670 	if (use_superblock && !use_blocksize) {
671 		for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
672 		     use_blocksize <= EXT2_MAX_BLOCK_SIZE;
673 		     use_blocksize *= 2) {
674 			retval = ext2fs_open (device_name, flags,
675 					      use_superblock,
676 					      use_blocksize, unix_io_manager,
677 					      &fs);
678 			if (!retval)
679 				break;
680 		}
681 	} else {
682 		retval = ext2fs_open(device_name, flags, use_superblock,
683 				     use_blocksize, unix_io_manager, &fs);
684 	}
685 	flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
686 	if (retval && !retval_csum) {
687 		retval_csum = retval;
688 		error_csum = _("while trying to open %s");
689 		goto try_open_again;
690 	}
691 	if (retval) {
692 		com_err(program_name, retval, _("while trying to open %s"),
693 			device_name);
694 		printf("%s", _("Couldn't find valid filesystem superblock.\n"));
695 		if (retval == EXT2_ET_BAD_MAGIC)
696 			check_plausibility(device_name, CHECK_FS_EXIST, NULL);
697 		goto out;
698 	}
699 	fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
700 	if (ext2fs_has_feature_64bit(fs->super))
701 		blocks64 = 1;
702 	if (mmp_check) {
703 		if (ext2fs_has_feature_mmp(fs->super) &&
704 		    fs->super->s_mmp_block != 0) {
705 			if (mmp_info) {
706 				print_mmp_block(fs);
707 				printf("    mmp_block_number: ");
708 				print_number(fs->super->s_mmp_block);
709 				printf("\n");
710 			} else {
711 				retval = check_mmp(fs);
712 			}
713 			if (!retval && retval_csum)
714 				retval = 2;
715 		} else {
716 			fprintf(stderr, _("%s: MMP feature not enabled.\n"),
717 				program_name);
718 			retval = 2;
719 		}
720 	} else if (print_badblocks) {
721 		list_bad_blocks(fs, 1);
722 	} else {
723 		if (grp_only)
724 			goto just_descriptors;
725 		list_super(fs->super);
726 		if (ext2fs_has_feature_journal_dev(fs->super)) {
727 			print_journal_information(fs);
728 
729 			goto out_close;
730 		}
731 		if (ext2fs_has_feature_journal(fs->super) &&
732 		    (fs->super->s_journal_inum != 0))
733 			print_inline_journal_information(fs);
734 		if (ext2fs_has_feature_mmp(fs->super) &&
735 		    fs->super->s_mmp_block != 0)
736 			print_mmp_block(fs);
737 		list_bad_blocks(fs, 0);
738 		if (header_only)
739 			goto out_close;
740 
741 		fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
742 try_bitmaps_again:
743 		retval = ext2fs_read_bitmaps(fs);
744 		if (retval && !retval_csum) {
745 			fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
746 			retval_csum = retval;
747 			error_csum = _("while trying to read '%s' bitmaps\n");
748 			goto try_bitmaps_again;
749 		}
750 just_descriptors:
751 		list_desc(fs, grp_only);
752 	}
753 out_close:
754 	if (retval_csum) {
755 		com_err(program_name, retval_csum, error_csum, device_name);
756 		printf("%s", _("*** Run e2fsck now!\n\n"));
757 		if (!retval)
758 			retval = retval_csum;
759 	}
760 	ext2fs_close_free(&fs);
761 	remove_error_table(&et_ext2_error_table);
762 out:
763 	return retval;
764 }
765