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] [-o superblock=<num>] "
54 "[-o blocksize=<num>] 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 = 0;
114
115 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
116 bg_flags = fs->group_desc[i].bg_flags;
117
118 print_bg_opt(bg_flags, EXT2_BG_INODE_UNINIT, "INODE_UNINIT",
119 &first);
120 print_bg_opt(bg_flags, EXT2_BG_BLOCK_UNINIT, "BLOCK_UNINIT",
121 &first);
122 print_bg_opt(bg_flags, EXT2_BG_INODE_ZEROED, "ITABLE_ZEROED",
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 block_nbytes, inode_nbytes;
138 int has_super;
139 blk_t blk_itr = fs->super->s_first_data_block;
140 ext2_ino_t ino_itr = 1;
141
142 block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
143 inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
144
145 if (fs->block_map)
146 block_bitmap = malloc(block_nbytes);
147 if (fs->inode_map)
148 inode_bitmap = malloc(inode_nbytes);
149
150 inode_blocks_per_group = ((fs->super->s_inodes_per_group *
151 EXT2_INODE_SIZE(fs->super)) +
152 EXT2_BLOCK_SIZE(fs->super) - 1) /
153 EXT2_BLOCK_SIZE(fs->super);
154 reserved_gdt = fs->super->s_reserved_gdt_blocks;
155 fputc('\n', stdout);
156 first_block = fs->super->s_first_data_block;
157 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
158 old_desc_blocks = fs->super->s_first_meta_bg;
159 else
160 old_desc_blocks = fs->desc_blocks;
161 for (i = 0; i < fs->group_desc_count; i++) {
162 first_block = ext2fs_group_first_block(fs, i);
163 last_block = ext2fs_group_last_block(fs, i);
164
165 ext2fs_super_and_bgd_loc(fs, i, &super_blk,
166 &old_desc_blk, &new_desc_blk, 0);
167
168 printf (_("Group %lu: (Blocks "), i);
169 print_range(first_block, last_block);
170 fputs(")", stdout);
171 print_bg_opts(fs, i);
172 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
173 printf(_(" Checksum 0x%04x, unused inodes %d\n"),
174 fs->group_desc[i].bg_checksum,
175 fs->group_desc[i].bg_itable_unused);
176 has_super = ((i==0) || super_blk);
177 if (has_super) {
178 printf (_(" %s superblock at "),
179 i == 0 ? _("Primary") : _("Backup"));
180 print_number(super_blk);
181 }
182 if (old_desc_blk) {
183 printf(_(", Group descriptors at "));
184 print_range(old_desc_blk,
185 old_desc_blk + old_desc_blocks - 1);
186 if (reserved_gdt) {
187 printf(_("\n Reserved GDT blocks at "));
188 print_range(old_desc_blk + old_desc_blocks,
189 old_desc_blk + old_desc_blocks +
190 reserved_gdt - 1);
191 }
192 } else if (new_desc_blk) {
193 fputc(has_super ? ',' : ' ', stdout);
194 printf(_(" Group descriptor at "));
195 print_number(new_desc_blk);
196 has_super++;
197 }
198 if (has_super)
199 fputc('\n', stdout);
200 fputs(_(" Block bitmap at "), stdout);
201 print_number(fs->group_desc[i].bg_block_bitmap);
202 diff = fs->group_desc[i].bg_block_bitmap - first_block;
203 if (diff >= 0)
204 printf(" (+%ld)", diff);
205 fputs(_(", Inode bitmap at "), stdout);
206 print_number(fs->group_desc[i].bg_inode_bitmap);
207 diff = fs->group_desc[i].bg_inode_bitmap - first_block;
208 if (diff >= 0)
209 printf(" (+%ld)", diff);
210 fputs(_("\n Inode table at "), stdout);
211 print_range(fs->group_desc[i].bg_inode_table,
212 fs->group_desc[i].bg_inode_table +
213 inode_blocks_per_group - 1);
214 diff = fs->group_desc[i].bg_inode_table - first_block;
215 if (diff > 0)
216 printf(" (+%ld)", diff);
217 printf (_("\n %u free blocks, %u free inodes, "
218 "%u directories%s"),
219 fs->group_desc[i].bg_free_blocks_count,
220 fs->group_desc[i].bg_free_inodes_count,
221 fs->group_desc[i].bg_used_dirs_count,
222 fs->group_desc[i].bg_itable_unused ? "" : "\n");
223 if (fs->group_desc[i].bg_itable_unused)
224 printf (_(", %u unused inodes\n"),
225 fs->group_desc[i].bg_itable_unused);
226 if (block_bitmap) {
227 fputs(_(" Free blocks: "), stdout);
228 ext2fs_get_block_bitmap_range(fs->block_map,
229 blk_itr, block_nbytes << 3, block_bitmap);
230 print_free (i, block_bitmap,
231 fs->super->s_blocks_per_group,
232 fs->super->s_first_data_block);
233 fputc('\n', stdout);
234 blk_itr += fs->super->s_blocks_per_group;
235 }
236 if (inode_bitmap) {
237 fputs(_(" Free inodes: "), stdout);
238 ext2fs_get_inode_bitmap_range(fs->inode_map,
239 ino_itr, inode_nbytes << 3, inode_bitmap);
240 print_free (i, inode_bitmap,
241 fs->super->s_inodes_per_group, 1);
242 fputc('\n', stdout);
243 ino_itr += fs->super->s_inodes_per_group;
244 }
245 }
246 if (block_bitmap)
247 free(block_bitmap);
248 if (inode_bitmap)
249 free(inode_bitmap);
250 }
251
list_bad_blocks(ext2_filsys fs,int dump)252 static void list_bad_blocks(ext2_filsys fs, int dump)
253 {
254 badblocks_list bb_list = 0;
255 badblocks_iterate bb_iter;
256 blk_t blk;
257 errcode_t retval;
258 const char *header, *fmt;
259
260 retval = ext2fs_read_bb_inode(fs, &bb_list);
261 if (retval) {
262 com_err("ext2fs_read_bb_inode", retval, 0);
263 return;
264 }
265 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
266 if (retval) {
267 com_err("ext2fs_badblocks_list_iterate_begin", retval,
268 _("while printing bad block list"));
269 return;
270 }
271 if (dump) {
272 header = fmt = "%u\n";
273 } else {
274 header = _("Bad blocks: %u");
275 fmt = ", %u";
276 }
277 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
278 printf(header ? header : fmt, blk);
279 header = 0;
280 }
281 ext2fs_badblocks_list_iterate_end(bb_iter);
282 if (!dump)
283 fputc('\n', stdout);
284 ext2fs_badblocks_list_free(bb_list);
285 }
286
print_inline_journal_information(ext2_filsys fs)287 static void print_inline_journal_information(ext2_filsys fs)
288 {
289 journal_superblock_t *jsb;
290 struct ext2_inode inode;
291 ext2_file_t journal_file;
292 errcode_t retval;
293 ino_t ino = fs->super->s_journal_inum;
294 char buf[1024];
295 __u32 *mask_ptr, mask, m;
296 int i, j, size, printed = 0;
297
298 retval = ext2fs_read_inode(fs, ino, &inode);
299 if (retval) {
300 com_err(program_name, retval,
301 _("while reading journal inode"));
302 exit(1);
303 }
304 retval = ext2fs_file_open2(fs, ino, &inode, 0, &journal_file);
305 if (retval) {
306 com_err(program_name, retval,
307 _("while opening journal inode"));
308 exit(1);
309 }
310 retval = ext2fs_file_read(journal_file, buf, sizeof(buf), 0);
311 if (retval) {
312 com_err(program_name, retval,
313 _("while reading journal super block"));
314 exit(1);
315 }
316 ext2fs_file_close(journal_file);
317 jsb = (journal_superblock_t *) buf;
318 if (be32_to_cpu(jsb->s_header.h_magic) != JFS_MAGIC_NUMBER) {
319 fprintf(stderr,
320 "Journal superblock magic number invalid!\n");
321 exit(1);
322 }
323 printf(_("Journal features: "));
324 for (i=0, mask_ptr=&jsb->s_feature_compat; i <3; i++,mask_ptr++) {
325 mask = be32_to_cpu(*mask_ptr);
326 for (j=0,m=1; j < 32; j++, m<<=1) {
327 if (mask & m) {
328 printf(" %s", e2p_jrnl_feature2string(i, m));
329 printed++;
330 }
331 }
332 }
333 if (printed == 0)
334 printf(" (none)");
335 printf("\n");
336 fputs(_("Journal size: "), stdout);
337 if ((fs->super->s_feature_ro_compat &
338 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
339 (inode.i_flags & EXT4_HUGE_FILE_FL))
340 size = inode.i_blocks / (fs->blocksize / 1024);
341 else
342 size = inode.i_blocks >> 1;
343 if (size < 8192)
344 printf("%uk\n", size);
345 else
346 printf("%uM\n", size >> 10);
347 printf(_("Journal length: %u\n"
348 "Journal sequence: 0x%08x\n"
349 "Journal start: %u\n"),
350 (unsigned int)ntohl(jsb->s_maxlen),
351 (unsigned int)ntohl(jsb->s_sequence),
352 (unsigned int)ntohl(jsb->s_start));
353 }
354
print_journal_information(ext2_filsys fs)355 static void print_journal_information(ext2_filsys fs)
356 {
357 errcode_t retval;
358 char buf[1024];
359 char str[80];
360 unsigned int i;
361 journal_superblock_t *jsb;
362
363 /* Get the journal superblock */
364 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
365 com_err(program_name, retval,
366 _("while reading journal superblock"));
367 exit(1);
368 }
369 jsb = (journal_superblock_t *) buf;
370 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
371 (jsb->s_header.h_blocktype !=
372 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
373 com_err(program_name, 0,
374 _("Couldn't find journal superblock magic numbers"));
375 exit(1);
376 }
377
378 printf(_("\nJournal block size: %u\n"
379 "Journal length: %u\n"
380 "Journal first block: %u\n"
381 "Journal sequence: 0x%08x\n"
382 "Journal start: %u\n"
383 "Journal number of users: %u\n"),
384 (unsigned int)ntohl(jsb->s_blocksize), (unsigned int)ntohl(jsb->s_maxlen),
385 (unsigned int)ntohl(jsb->s_first), (unsigned int)ntohl(jsb->s_sequence),
386 (unsigned int)ntohl(jsb->s_start), (unsigned int)ntohl(jsb->s_nr_users));
387
388 for (i=0; i < ntohl(jsb->s_nr_users); i++) {
389 uuid_unparse(&jsb->s_users[i*16], str);
390 printf(i ? " %s\n"
391 : _("Journal users: %s\n"),
392 str);
393 }
394 }
395
parse_extended_opts(const char * opts,blk_t * superblock,int * blocksize)396 static void parse_extended_opts(const char *opts, blk_t *superblock,
397 int *blocksize)
398 {
399 char *buf, *token, *next, *p, *arg, *badopt = 0;
400 int len;
401 int do_usage = 0;
402
403 len = strlen(opts);
404 buf = malloc(len+1);
405 if (!buf) {
406 fprintf(stderr,
407 _("Couldn't allocate memory to parse options!\n"));
408 exit(1);
409 }
410 strcpy(buf, opts);
411 for (token = buf; token && *token; token = next) {
412 p = strchr(token, ',');
413 next = 0;
414 if (p) {
415 *p = 0;
416 next = p+1;
417 }
418 arg = strchr(token, '=');
419 if (arg) {
420 *arg = 0;
421 arg++;
422 }
423 if (strcmp(token, "superblock") == 0 ||
424 strcmp(token, "sb") == 0) {
425 if (!arg) {
426 do_usage++;
427 badopt = token;
428 continue;
429 }
430 *superblock = strtoul(arg, &p, 0);
431 if (*p) {
432 fprintf(stderr,
433 _("Invalid superblock parameter: %s\n"),
434 arg);
435 do_usage++;
436 continue;
437 }
438 } else if (strcmp(token, "blocksize") == 0 ||
439 strcmp(token, "bs") == 0) {
440 if (!arg) {
441 do_usage++;
442 badopt = token;
443 continue;
444 }
445 *blocksize = strtoul(arg, &p, 0);
446 if (*p) {
447 fprintf(stderr,
448 _("Invalid blocksize parameter: %s\n"),
449 arg);
450 do_usage++;
451 continue;
452 }
453 } else {
454 do_usage++;
455 badopt = token;
456 }
457 }
458 if (do_usage) {
459 fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n"
460 "Extended options are separated by commas, "
461 "and may take an argument which\n"
462 "\tis set off by an equals ('=') sign.\n\n"
463 "Valid extended options are:\n"
464 "\tsuperblock=<superblock number>\n"
465 "\tblocksize=<blocksize>\n"),
466 badopt ? badopt : "");
467 free(buf);
468 exit(1);
469 }
470 free(buf);
471 }
472
main(int argc,char ** argv)473 int main (int argc, char ** argv)
474 {
475 errcode_t retval;
476 ext2_filsys fs;
477 int print_badblocks = 0;
478 blk_t use_superblock = 0;
479 int use_blocksize = 0;
480 int image_dump = 0;
481 int force = 0;
482 int flags;
483 int header_only = 0;
484 int c;
485
486 #ifdef ENABLE_NLS
487 setlocale(LC_MESSAGES, "");
488 setlocale(LC_CTYPE, "");
489 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
490 textdomain(NLS_CAT_NAME);
491 #endif
492 add_error_table(&et_ext2_error_table);
493 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
494 E2FSPROGS_DATE);
495 if (argc && *argv)
496 program_name = *argv;
497
498 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
499 switch (c) {
500 case 'b':
501 print_badblocks++;
502 break;
503 case 'f':
504 force++;
505 break;
506 case 'h':
507 header_only++;
508 break;
509 case 'i':
510 image_dump++;
511 break;
512 case 'o':
513 parse_extended_opts(optarg, &use_superblock,
514 &use_blocksize);
515 break;
516 case 'V':
517 /* Print version number and exit */
518 fprintf(stderr, _("\tUsing %s\n"),
519 error_message(EXT2_ET_BASE));
520 exit(0);
521 case 'x':
522 hex_format++;
523 break;
524 default:
525 usage();
526 }
527 }
528 if (optind > argc - 1)
529 usage();
530 device_name = argv[optind++];
531 flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES;
532 if (force)
533 flags |= EXT2_FLAG_FORCE;
534 if (image_dump)
535 flags |= EXT2_FLAG_IMAGE_FILE;
536
537 if (use_superblock && !use_blocksize) {
538 for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
539 use_blocksize <= EXT2_MAX_BLOCK_SIZE;
540 use_blocksize *= 2) {
541 retval = ext2fs_open (device_name, flags,
542 use_superblock,
543 use_blocksize, unix_io_manager,
544 &fs);
545 if (!retval)
546 break;
547 }
548 } else
549 retval = ext2fs_open (device_name, flags, use_superblock,
550 use_blocksize, unix_io_manager, &fs);
551 if (retval) {
552 com_err (program_name, retval, _("while trying to open %s"),
553 device_name);
554 printf (_("Couldn't find valid filesystem superblock.\n"));
555 exit (1);
556 }
557 if (print_badblocks) {
558 list_bad_blocks(fs, 1);
559 } else {
560 list_super (fs->super);
561 if (fs->super->s_feature_incompat &
562 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
563 print_journal_information(fs);
564 ext2fs_close(fs);
565 exit(0);
566 }
567 if ((fs->super->s_feature_compat &
568 EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
569 (fs->super->s_journal_inum != 0))
570 print_inline_journal_information(fs);
571 list_bad_blocks(fs, 0);
572 if (header_only) {
573 ext2fs_close (fs);
574 exit (0);
575 }
576 retval = ext2fs_read_bitmaps (fs);
577 list_desc (fs);
578 if (retval) {
579 printf(_("\n%s: %s: error reading bitmaps: %s\n"),
580 program_name, device_name,
581 error_message(retval));
582 }
583 }
584 ext2fs_close (fs);
585 remove_error_table(&et_ext2_error_table);
586 exit (0);
587 }
588