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 #ifdef HAVE_GETOPT_H
24 #include <getopt.h>
25 #else
26 extern char *optarg;
27 extern int optind;
28 #endif
29 #include <fcntl.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34
35 #include "ext2fs/ext2_fs.h"
36
37 #include "ext2fs/ext2fs.h"
38 #include "e2p/e2p.h"
39 #include "jfs_user.h"
40 #include <uuid/uuid.h>
41
42 #include "../version.h"
43 #include "nls-enable.h"
44
45 #define in_use(m, x) (ext2fs_test_bit ((x), (m)))
46
47 const char * program_name = "dumpe2fs";
48 char * device_name = NULL;
49 int hex_format = 0;
50
usage(void)51 static void usage(void)
52 {
53 fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
54 "[-oB blocksize] device\n"), program_name);
55 exit (1);
56 }
57
print_number(unsigned long num)58 static void print_number(unsigned long num)
59 {
60 if (hex_format)
61 printf("0x%04lx", num);
62 else
63 printf("%lu", num);
64 }
65
print_range(unsigned long a,unsigned long b)66 static void print_range(unsigned long a, unsigned long b)
67 {
68 if (hex_format)
69 printf("0x%04lx-0x%04lx", a, b);
70 else
71 printf("%lu-%lu", a, b);
72 }
73
print_free(unsigned long group,char * bitmap,unsigned long nbytes,unsigned long offset)74 static void print_free (unsigned long group, char * bitmap,
75 unsigned long nbytes, unsigned long offset)
76 {
77 int p = 0;
78 unsigned long i;
79 unsigned long j;
80
81 offset += group * nbytes;
82 for (i = 0; i < nbytes; i++)
83 if (!in_use (bitmap, i))
84 {
85 if (p)
86 printf (", ");
87 print_number(i + offset);
88 for (j = i; j < nbytes && !in_use (bitmap, j); j++)
89 ;
90 if (--j != i) {
91 fputc('-', stdout);
92 print_number(j + offset);
93 i = j;
94 }
95 p = 1;
96 }
97 }
98
print_bg_opt(int bg_flags,int mask,const char * str,int * first)99 static void print_bg_opt(int bg_flags, int mask,
100 const char *str, int *first)
101 {
102 if (bg_flags & mask) {
103 if (*first) {
104 fputs(" [", stdout);
105 *first = 0;
106 } else
107 fputs(", ", stdout);
108 fputs(str, stdout);
109 }
110 }
print_bg_opts(ext2_filsys fs,dgrp_t i)111 static void print_bg_opts(ext2_filsys fs, dgrp_t i)
112 {
113 int first = 1, bg_flags;
114
115 if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_LAZY_BG)
116 bg_flags = fs->group_desc[i].bg_flags;
117 else
118 bg_flags = 0;
119
120 print_bg_opt(bg_flags, EXT2_BG_INODE_UNINIT, "Inode not init",
121 &first);
122 print_bg_opt(bg_flags, EXT2_BG_BLOCK_UNINIT, "Block not init",
123 &first);
124 if (!first)
125 fputc(']', stdout);
126 fputc('\n', stdout);
127 }
128
list_desc(ext2_filsys fs)129 static void list_desc (ext2_filsys fs)
130 {
131 unsigned long i;
132 long diff;
133 blk_t first_block, last_block;
134 blk_t super_blk, old_desc_blk, new_desc_blk;
135 char *block_bitmap=NULL, *inode_bitmap=NULL;
136 int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
137 int has_super;
138
139 if (fs->block_map)
140 block_bitmap = fs->block_map->bitmap;
141 if (fs->inode_map)
142 inode_bitmap = fs->inode_map->bitmap;
143
144 inode_blocks_per_group = ((fs->super->s_inodes_per_group *
145 EXT2_INODE_SIZE(fs->super)) +
146 EXT2_BLOCK_SIZE(fs->super) - 1) /
147 EXT2_BLOCK_SIZE(fs->super);
148 reserved_gdt = fs->super->s_reserved_gdt_blocks;
149 fputc('\n', stdout);
150 first_block = fs->super->s_first_data_block;
151 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
152 old_desc_blocks = fs->super->s_first_meta_bg;
153 else
154 old_desc_blocks = fs->desc_blocks;
155 for (i = 0; i < fs->group_desc_count; i++) {
156 first_block = ext2fs_group_first_block(fs, i);
157 last_block = ext2fs_group_last_block(fs, i);
158
159 ext2fs_super_and_bgd_loc(fs, i, &super_blk,
160 &old_desc_blk, &new_desc_blk, 0);
161
162 printf (_("Group %lu: (Blocks "), i);
163 print_range(first_block, last_block);
164 fputs(")", stdout);
165 print_bg_opts(fs, i);
166 has_super = ((i==0) || super_blk);
167 if (has_super) {
168 printf (_(" %s superblock at "),
169 i == 0 ? _("Primary") : _("Backup"));
170 print_number(super_blk);
171 }
172 if (old_desc_blk) {
173 printf(_(", Group descriptors at "));
174 print_range(old_desc_blk,
175 old_desc_blk + old_desc_blocks - 1);
176 if (reserved_gdt) {
177 printf(_("\n Reserved GDT blocks at "));
178 print_range(old_desc_blk + old_desc_blocks,
179 old_desc_blk + old_desc_blocks +
180 reserved_gdt - 1);
181 }
182 } else if (new_desc_blk) {
183 fputc(has_super ? ',' : ' ', stdout);
184 printf(_(" Group descriptor at "));
185 print_number(new_desc_blk);
186 has_super++;
187 }
188 if (has_super)
189 fputc('\n', stdout);
190 fputs(_(" Block bitmap at "), stdout);
191 print_number(fs->group_desc[i].bg_block_bitmap);
192 diff = fs->group_desc[i].bg_block_bitmap - first_block;
193 if (diff >= 0)
194 printf(" (+%ld)", diff);
195 fputs(_(", Inode bitmap at "), stdout);
196 print_number(fs->group_desc[i].bg_inode_bitmap);
197 diff = fs->group_desc[i].bg_inode_bitmap - first_block;
198 if (diff >= 0)
199 printf(" (+%ld)", diff);
200 fputs(_("\n Inode table at "), stdout);
201 print_range(fs->group_desc[i].bg_inode_table,
202 fs->group_desc[i].bg_inode_table +
203 inode_blocks_per_group - 1);
204 diff = fs->group_desc[i].bg_inode_table - first_block;
205 if (diff > 0)
206 printf(" (+%ld)", diff);
207 printf (_("\n %d free blocks, %d free inodes, "
208 "%d directories\n"),
209 fs->group_desc[i].bg_free_blocks_count,
210 fs->group_desc[i].bg_free_inodes_count,
211 fs->group_desc[i].bg_used_dirs_count);
212 if (block_bitmap) {
213 fputs(_(" Free blocks: "), stdout);
214 print_free (i, block_bitmap,
215 fs->super->s_blocks_per_group,
216 fs->super->s_first_data_block);
217 fputc('\n', stdout);
218 block_bitmap += fs->super->s_blocks_per_group / 8;
219 }
220 if (inode_bitmap) {
221 fputs(_(" Free inodes: "), stdout);
222 print_free (i, inode_bitmap,
223 fs->super->s_inodes_per_group, 1);
224 fputc('\n', stdout);
225 inode_bitmap += fs->super->s_inodes_per_group / 8;
226 }
227 }
228 }
229
list_bad_blocks(ext2_filsys fs,int dump)230 static void list_bad_blocks(ext2_filsys fs, int dump)
231 {
232 badblocks_list bb_list = 0;
233 badblocks_iterate bb_iter;
234 blk_t blk;
235 errcode_t retval;
236 const char *header, *fmt;
237
238 retval = ext2fs_read_bb_inode(fs, &bb_list);
239 if (retval) {
240 com_err("ext2fs_read_bb_inode", retval, 0);
241 return;
242 }
243 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
244 if (retval) {
245 com_err("ext2fs_badblocks_list_iterate_begin", retval,
246 _("while printing bad block list"));
247 return;
248 }
249 if (dump) {
250 header = fmt = "%u\n";
251 } else {
252 header = _("Bad blocks: %u");
253 fmt = ", %u";
254 }
255 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
256 printf(header ? header : fmt, blk);
257 header = 0;
258 }
259 ext2fs_badblocks_list_iterate_end(bb_iter);
260 if (!dump)
261 fputc('\n', stdout);
262 }
263
print_inline_journal_information(ext2_filsys fs)264 static void print_inline_journal_information(ext2_filsys fs)
265 {
266 struct ext2_inode inode;
267 errcode_t retval;
268 ino_t ino = fs->super->s_journal_inum;
269 int size;
270
271 retval = ext2fs_read_inode(fs, ino, &inode);
272 if (retval) {
273 com_err(program_name, retval,
274 _("while reading journal inode"));
275 exit(1);
276 }
277 fputs(_("Journal size: "), stdout);
278 size = inode.i_blocks >> 1;
279 if (size < 8192)
280 printf("%uk\n", size);
281 else
282 printf("%uM\n", size >> 10);
283 }
284
print_journal_information(ext2_filsys fs)285 static void print_journal_information(ext2_filsys fs)
286 {
287 errcode_t retval;
288 char buf[1024];
289 char str[80];
290 unsigned int i;
291 journal_superblock_t *jsb;
292
293 /* Get the journal superblock */
294 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
295 com_err(program_name, retval,
296 _("while reading journal superblock"));
297 exit(1);
298 }
299 jsb = (journal_superblock_t *) buf;
300 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
301 (jsb->s_header.h_blocktype !=
302 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
303 com_err(program_name, 0,
304 _("Couldn't find journal superblock magic numbers"));
305 exit(1);
306 }
307
308 printf(_("\nJournal block size: %u\n"
309 "Journal length: %u\n"
310 "Journal first block: %u\n"
311 "Journal sequence: 0x%08x\n"
312 "Journal start: %u\n"
313 "Journal number of users: %u\n"),
314 (unsigned int)ntohl(jsb->s_blocksize), (unsigned int)ntohl(jsb->s_maxlen),
315 (unsigned int)ntohl(jsb->s_first), (unsigned int)ntohl(jsb->s_sequence),
316 (unsigned int)ntohl(jsb->s_start), (unsigned int)ntohl(jsb->s_nr_users));
317
318 for (i=0; i < ntohl(jsb->s_nr_users); i++) {
319 uuid_unparse(&jsb->s_users[i*16], str);
320 printf(i ? " %s\n"
321 : _("Journal users: %s\n"),
322 str);
323 }
324 }
325
parse_extended_opts(const char * opts,blk_t * superblock,int * blocksize)326 static void parse_extended_opts(const char *opts, blk_t *superblock,
327 int *blocksize)
328 {
329 char *buf, *token, *next, *p, *arg, *badopt = "";
330 int len;
331 int usage = 0;
332
333 len = strlen(opts);
334 buf = malloc(len+1);
335 if (!buf) {
336 fprintf(stderr,
337 _("Couldn't allocate memory to parse options!\n"));
338 exit(1);
339 }
340 strcpy(buf, opts);
341 for (token = buf; token && *token; token = next) {
342 p = strchr(token, ',');
343 next = 0;
344 if (p) {
345 *p = 0;
346 next = p+1;
347 }
348 arg = strchr(token, '=');
349 if (arg) {
350 *arg = 0;
351 arg++;
352 }
353 if (strcmp(token, "superblock") == 0 ||
354 strcmp(token, "sb") == 0) {
355 if (!arg) {
356 usage++;
357 badopt = token;
358 continue;
359 }
360 *superblock = strtoul(arg, &p, 0);
361 if (*p) {
362 fprintf(stderr,
363 _("Invalid superblock parameter: %s\n"),
364 arg);
365 usage++;
366 continue;
367 }
368 } else if (strcmp(token, "blocksize") == 0 ||
369 strcmp(token, "bs") == 0) {
370 if (!arg) {
371 usage++;
372 badopt = token;
373 continue;
374 }
375 *blocksize = strtoul(arg, &p, 0);
376 if (*p) {
377 fprintf(stderr,
378 _("Invalid blocksize parameter: %s\n"),
379 arg);
380 usage++;
381 continue;
382 }
383 } else {
384 usage++;
385 badopt = token;
386 }
387 }
388 if (usage) {
389 fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n"
390 "Extended options are separated by commas, "
391 "and may take an argument which\n"
392 "\tis set off by an equals ('=') sign.\n\n"
393 "Valid extended options are:\n"
394 "\tsuperblock=<superblock number>\n"
395 "\tblocksize=<blocksize>\n"),
396 badopt);
397 free(buf);
398 exit(1);
399 }
400 free(buf);
401 }
402
main(int argc,char ** argv)403 int main (int argc, char ** argv)
404 {
405 errcode_t retval;
406 ext2_filsys fs;
407 int print_badblocks = 0;
408 int use_superblock = 0;
409 int use_blocksize = 0;
410 int image_dump = 0;
411 int force = 0;
412 int flags;
413 int header_only = 0;
414 int big_endian;
415 int c;
416
417 #ifdef ENABLE_NLS
418 setlocale(LC_MESSAGES, "");
419 setlocale(LC_CTYPE, "");
420 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
421 textdomain(NLS_CAT_NAME);
422 #endif
423 add_error_table(&et_ext2_error_table);
424 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
425 E2FSPROGS_DATE);
426 if (argc && *argv)
427 program_name = *argv;
428
429 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
430 switch (c) {
431 case 'b':
432 print_badblocks++;
433 break;
434 case 'f':
435 force++;
436 break;
437 case 'h':
438 header_only++;
439 break;
440 case 'i':
441 image_dump++;
442 break;
443 case 'o':
444 parse_extended_opts(optarg, &use_superblock,
445 &use_blocksize);
446 break;
447 case 'V':
448 /* Print version number and exit */
449 fprintf(stderr, _("\tUsing %s\n"),
450 error_message(EXT2_ET_BASE));
451 exit(0);
452 case 'x':
453 hex_format++;
454 break;
455 default:
456 usage();
457 }
458 }
459 if (optind > argc - 1)
460 usage();
461 device_name = argv[optind++];
462 flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES;
463 if (force)
464 flags |= EXT2_FLAG_FORCE;
465 if (image_dump)
466 flags |= EXT2_FLAG_IMAGE_FILE;
467
468 if (use_superblock && !use_blocksize) {
469 for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
470 use_blocksize <= EXT2_MAX_BLOCK_SIZE;
471 use_blocksize *= 2) {
472 retval = ext2fs_open (device_name, flags,
473 use_superblock,
474 use_blocksize, unix_io_manager,
475 &fs);
476 if (!retval)
477 break;
478 }
479 } else
480 retval = ext2fs_open (device_name, flags, use_superblock,
481 use_blocksize, unix_io_manager, &fs);
482 if (retval) {
483 com_err (program_name, retval, _("while trying to open %s"),
484 device_name);
485 printf (_("Couldn't find valid filesystem superblock.\n"));
486 exit (1);
487 }
488 if (print_badblocks) {
489 list_bad_blocks(fs, 1);
490 } else {
491 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
492 #ifdef WORDS_BIGENDIAN
493 big_endian = !big_endian;
494 #endif
495 if (big_endian)
496 printf(_("Note: This is a byte-swapped filesystem\n"));
497 list_super (fs->super);
498 if (fs->super->s_feature_incompat &
499 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
500 print_journal_information(fs);
501 ext2fs_close(fs);
502 exit(0);
503 }
504 if (fs->super->s_feature_compat &
505 EXT3_FEATURE_COMPAT_HAS_JOURNAL)
506 print_inline_journal_information(fs);
507 list_bad_blocks(fs, 0);
508 if (header_only) {
509 ext2fs_close (fs);
510 exit (0);
511 }
512 retval = ext2fs_read_bitmaps (fs);
513 list_desc (fs);
514 if (retval) {
515 printf(_("\n%s: %s: error reading bitmaps: %s\n"),
516 program_name, device_name,
517 error_message(retval));
518 }
519 }
520 ext2fs_close (fs);
521 remove_error_table(&et_ext2_error_table);
522 exit (0);
523 }
524