1 /*
2 * logdump.c --- dump the contents of the journal out to a file
3 *
4 * Author: Stephen C. Tweedie, 2001 <sct@redhat.com>
5 * Copyright (C) 2001 Red Hat, Inc.
6 * Based on portions Copyright (C) 1994 Theodore Ts'o.
7 *
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 */
11
12 #include "config.h"
13 #include <stdio.h>
14 #include <unistd.h>
15 #include <stdlib.h>
16 #include <ctype.h>
17 #include <string.h>
18 #include <time.h>
19 #ifdef HAVE_ERRNO_H
20 #include <errno.h>
21 #endif
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <utime.h>
26 #ifdef HAVE_GETOPT_H
27 #include <getopt.h>
28 #else
29 extern int optind;
30 extern char *optarg;
31 #endif
32
33 #include "debugfs.h"
34 #include "blkid/blkid.h"
35 #include "jfs_user.h"
36 #include <uuid/uuid.h>
37
38 enum journal_location {JOURNAL_IS_INTERNAL, JOURNAL_IS_EXTERNAL};
39
40 #define ANY_BLOCK ((blk64_t) -1)
41
42 static int dump_all, dump_super, dump_old, dump_contents, dump_descriptors;
43 static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
44 static unsigned int group_to_dump, inode_offset_to_dump;
45 static ext2_ino_t inode_to_dump;
46
47 struct journal_source
48 {
49 enum journal_location where;
50 int fd;
51 ext2_file_t file;
52 };
53
54 static void dump_journal(char *, FILE *, struct journal_source *);
55
56 static void dump_descriptor_block(FILE *, struct journal_source *,
57 char *, journal_superblock_t *,
58 unsigned int *, int, tid_t);
59
60 static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
61 unsigned int, int, tid_t);
62
63 static void dump_metadata_block(FILE *, struct journal_source *,
64 journal_superblock_t*,
65 unsigned int, unsigned int, unsigned int,
66 int, tid_t);
67
68 static void do_hexdump (FILE *, char *, int);
69
70 #define WRAP(jsb, blocknr) \
71 if (blocknr >= be32_to_cpu((jsb)->s_maxlen)) \
72 blocknr -= (be32_to_cpu((jsb)->s_maxlen) - \
73 be32_to_cpu((jsb)->s_first));
74
do_logdump(int argc,char ** argv,int sci_idx EXT2FS_ATTR ((unused)),void * infop EXT2FS_ATTR ((unused)))75 void do_logdump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
76 void *infop EXT2FS_ATTR((unused)))
77 {
78 int c;
79 int retval;
80 char *out_fn;
81 FILE *out_file;
82
83 char *inode_spec = NULL;
84 char *journal_fn = NULL;
85 int journal_fd = 0;
86 int use_sb = 0;
87 ext2_ino_t journal_inum;
88 struct ext2_inode journal_inode;
89 ext2_file_t journal_file;
90 char *tmp;
91 struct journal_source journal_source;
92 struct ext2_super_block *es = NULL;
93
94 journal_source.where = JOURNAL_IS_INTERNAL;
95 journal_source.fd = 0;
96 journal_source.file = 0;
97 dump_all = 0;
98 dump_old = 0;
99 dump_contents = 0;
100 dump_super = 0;
101 dump_descriptors = 1;
102 block_to_dump = ANY_BLOCK;
103 bitmap_to_dump = -1;
104 inode_block_to_dump = ANY_BLOCK;
105 inode_to_dump = -1;
106
107 reset_getopt();
108 while ((c = getopt (argc, argv, "ab:ci:f:OsS")) != EOF) {
109 switch (c) {
110 case 'a':
111 dump_all++;
112 break;
113 case 'b':
114 block_to_dump = strtoul(optarg, &tmp, 0);
115 if (*tmp) {
116 com_err(argv[0], 0,
117 "Bad block number - %s", optarg);
118 return;
119 }
120 dump_descriptors = 0;
121 break;
122 case 'c':
123 dump_contents++;
124 break;
125 case 'f':
126 journal_fn = optarg;
127 break;
128 case 'i':
129 inode_spec = optarg;
130 dump_descriptors = 0;
131 break;
132 case 'O':
133 dump_old++;
134 break;
135 case 's':
136 use_sb++;
137 break;
138 case 'S':
139 dump_super++;
140 break;
141 default:
142 goto print_usage;
143 }
144 }
145 if (optind != argc && optind != argc-1) {
146 goto print_usage;
147 }
148
149 if (current_fs)
150 es = current_fs->super;
151
152 if (inode_spec) {
153 int inode_group, group_offset, inodes_per_block;
154
155 if (check_fs_open(argv[0]))
156 return;
157
158 inode_to_dump = string_to_inode(inode_spec);
159 if (!inode_to_dump)
160 return;
161
162 inode_group = ((inode_to_dump - 1)
163 / es->s_inodes_per_group);
164 group_offset = ((inode_to_dump - 1)
165 % es->s_inodes_per_group);
166 inodes_per_block = (current_fs->blocksize
167 / sizeof(struct ext2_inode));
168
169 inode_block_to_dump =
170 ext2fs_inode_table_loc(current_fs, inode_group) +
171 (group_offset / inodes_per_block);
172 inode_offset_to_dump = ((group_offset % inodes_per_block)
173 * sizeof(struct ext2_inode));
174 printf("Inode %u is at group %u, block %llu, offset %u\n",
175 inode_to_dump, inode_group,
176 inode_block_to_dump, inode_offset_to_dump);
177 }
178
179 if (optind == argc) {
180 out_file = stdout;
181 } else {
182 out_fn = argv[optind];
183 out_file = fopen(out_fn, "w");
184 if (!out_file) {
185 com_err(argv[0], errno, "while opening %s for logdump",
186 out_fn);
187 goto errout;
188 }
189 }
190
191 if (block_to_dump != ANY_BLOCK && current_fs != NULL) {
192 group_to_dump = ((block_to_dump -
193 es->s_first_data_block)
194 / es->s_blocks_per_group);
195 bitmap_to_dump = ext2fs_block_bitmap_loc(current_fs, group_to_dump);
196 }
197
198 if (!journal_fn && check_fs_open(argv[0]))
199 goto errout;
200
201 if (journal_fn) {
202 /* Set up to read journal from a regular file somewhere */
203 journal_fd = open(journal_fn, O_RDONLY, 0);
204 if (journal_fd < 0) {
205 com_err(argv[0], errno, "while opening %s for logdump",
206 journal_fn);
207 goto errout;
208 }
209
210 journal_source.where = JOURNAL_IS_EXTERNAL;
211 journal_source.fd = journal_fd;
212 } else if ((journal_inum = es->s_journal_inum)) {
213 if (use_sb) {
214 if (es->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS) {
215 com_err(argv[0], 0,
216 "no journal backup in super block\n");
217 goto errout;
218 }
219 memset(&journal_inode, 0, sizeof(struct ext2_inode));
220 memcpy(&journal_inode.i_block[0], es->s_jnl_blocks,
221 EXT2_N_BLOCKS*4);
222 journal_inode.i_size_high = es->s_jnl_blocks[15];
223 journal_inode.i_size = es->s_jnl_blocks[16];
224 journal_inode.i_links_count = 1;
225 journal_inode.i_mode = LINUX_S_IFREG | 0600;
226 } else {
227 if (debugfs_read_inode(journal_inum, &journal_inode,
228 argv[0]))
229 goto errout;
230 }
231
232 retval = ext2fs_file_open2(current_fs, journal_inum,
233 &journal_inode, 0, &journal_file);
234 if (retval) {
235 com_err(argv[0], retval, "while opening ext2 file");
236 goto errout;
237 }
238 journal_source.where = JOURNAL_IS_INTERNAL;
239 journal_source.file = journal_file;
240 } else {
241 char uuid[37];
242
243 uuid_unparse(es->s_journal_uuid, uuid);
244 journal_fn = blkid_get_devname(NULL, "UUID", uuid);
245 if (!journal_fn)
246 journal_fn = blkid_devno_to_devname(es->s_journal_dev);
247 if (!journal_fn) {
248 com_err(argv[0], 0, "filesystem has no journal");
249 goto errout;
250 }
251 journal_fd = open(journal_fn, O_RDONLY, 0);
252 if (journal_fd < 0) {
253 com_err(argv[0], errno, "while opening %s for logdump",
254 journal_fn);
255 free(journal_fn);
256 goto errout;
257 }
258 fprintf(out_file, "Using external journal found at %s\n",
259 journal_fn);
260 free(journal_fn);
261 journal_source.where = JOURNAL_IS_EXTERNAL;
262 journal_source.fd = journal_fd;
263 }
264
265 dump_journal(argv[0], out_file, &journal_source);
266
267 if (journal_source.where == JOURNAL_IS_INTERNAL)
268 ext2fs_file_close(journal_file);
269 else
270 close(journal_fd);
271
272 errout:
273 if (out_file && (out_file != stdout))
274 fclose(out_file);
275
276 return;
277
278 print_usage:
279 fprintf(stderr, "%s: Usage: logdump [-acsOS] [-b<block>] [-i<filespec>]\n\t"
280 "[-f<journal_file>] [output_file]\n", argv[0]);
281 }
282
283
read_journal_block(const char * cmd,struct journal_source * source,ext2_loff_t offset,char * buf,unsigned int size)284 static int read_journal_block(const char *cmd, struct journal_source *source,
285 ext2_loff_t offset, char *buf, unsigned int size)
286 {
287 int retval;
288 unsigned int got;
289
290 if (source->where == JOURNAL_IS_EXTERNAL) {
291 if (lseek(source->fd, offset, SEEK_SET) < 0) {
292 retval = errno;
293 goto seek_err;
294 }
295 retval = read(source->fd, buf, size);
296 if (retval < 0) {
297 retval = errno;
298 goto read_err;
299 }
300 got = retval;
301 retval = 0;
302 } else {
303 retval = ext2fs_file_llseek(source->file, offset,
304 EXT2_SEEK_SET, NULL);
305 if (retval) {
306 seek_err:
307 com_err(cmd, retval, "while seeking in reading journal");
308 return retval;
309 }
310 retval = ext2fs_file_read(source->file, buf, size, &got);
311 if (retval) {
312 read_err:
313 com_err(cmd, retval, "while reading journal");
314 return retval;
315 }
316 }
317 if (got != size) {
318 com_err(cmd, 0, "short read (read %u, expected %u) "
319 "while reading journal", got, size);
320 retval = -1;
321 }
322 return retval;
323 }
324
type_to_name(int btype)325 static const char *type_to_name(int btype)
326 {
327 switch (btype) {
328 case JFS_DESCRIPTOR_BLOCK:
329 return "descriptor block";
330 case JFS_COMMIT_BLOCK:
331 return "commit block";
332 case JFS_SUPERBLOCK_V1:
333 return "V1 superblock";
334 case JFS_SUPERBLOCK_V2:
335 return "V2 superblock";
336 case JFS_REVOKE_BLOCK:
337 return "revoke table";
338 }
339 return "unrecognised type";
340 }
341
342
dump_journal(char * cmdname,FILE * out_file,struct journal_source * source)343 static void dump_journal(char *cmdname, FILE *out_file,
344 struct journal_source *source)
345 {
346 struct ext2_super_block *sb;
347 char jsb_buffer[1024];
348 char buf[8192];
349 journal_superblock_t *jsb;
350 unsigned int blocksize = 1024;
351 int retval;
352 __u32 magic, sequence, blocktype;
353 journal_header_t *header;
354 tid_t transaction;
355 unsigned int blocknr = 0;
356
357 /* First, check to see if there's an ext2 superblock header */
358 retval = read_journal_block(cmdname, source, 0, buf, 2048);
359 if (retval)
360 return;
361
362 jsb = (journal_superblock_t *) buf;
363 sb = (struct ext2_super_block *) (buf+1024);
364 #ifdef WORDS_BIGENDIAN
365 if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
366 ext2fs_swap_super(sb);
367 #endif
368
369 if ((be32_to_cpu(jsb->s_header.h_magic) != JFS_MAGIC_NUMBER) &&
370 (sb->s_magic == EXT2_SUPER_MAGIC) &&
371 ext2fs_has_feature_journal_dev(sb)) {
372 blocksize = EXT2_BLOCK_SIZE(sb);
373 blocknr = (blocksize == 1024) ? 2 : 1;
374 uuid_unparse(sb->s_uuid, jsb_buffer);
375 fprintf(out_file, "Ext2 superblock header found.\n");
376 if (dump_all) {
377 fprintf(out_file, "\tuuid=%s\n", jsb_buffer);
378 fprintf(out_file, "\tblocksize=%d\n", blocksize);
379 fprintf(out_file, "\tjournal data size %lu\n",
380 (unsigned long) ext2fs_blocks_count(sb));
381 }
382 }
383
384 /* Next, read the journal superblock */
385 retval = read_journal_block(cmdname, source,
386 ((ext2_loff_t) blocknr) * blocksize,
387 jsb_buffer, 1024);
388 if (retval)
389 return;
390
391 if (dump_super) {
392 e2p_list_journal_super(out_file, jsb_buffer,
393 current_fs->blocksize, 0);
394 fputc('\n', out_file);
395 }
396
397 jsb = (journal_superblock_t *) jsb_buffer;
398 if (be32_to_cpu(jsb->s_header.h_magic) != JFS_MAGIC_NUMBER) {
399 fprintf(out_file,
400 "Journal superblock magic number invalid!\n");
401 return;
402 }
403 blocksize = be32_to_cpu(jsb->s_blocksize);
404 transaction = be32_to_cpu(jsb->s_sequence);
405 blocknr = be32_to_cpu(jsb->s_start);
406
407 fprintf(out_file, "Journal starts at block %u, transaction %u\n",
408 blocknr, transaction);
409
410 if (!blocknr) {
411 /* Empty journal, nothing to do. */
412 if (!dump_old)
413 return;
414 else
415 blocknr = 1;
416 }
417
418 while (1) {
419 retval = read_journal_block(cmdname, source,
420 ((ext2_loff_t) blocknr) * blocksize,
421 buf, blocksize);
422 if (retval)
423 return;
424
425 header = (journal_header_t *) buf;
426
427 magic = be32_to_cpu(header->h_magic);
428 sequence = be32_to_cpu(header->h_sequence);
429 blocktype = be32_to_cpu(header->h_blocktype);
430
431 if (magic != JFS_MAGIC_NUMBER) {
432 fprintf (out_file, "No magic number at block %u: "
433 "end of journal.\n", blocknr);
434 return;
435 }
436
437 if (sequence != transaction) {
438 fprintf (out_file, "Found sequence %u (not %u) at "
439 "block %u: end of journal.\n",
440 sequence, transaction, blocknr);
441 if (!dump_old)
442 return;
443 }
444
445 if (dump_descriptors) {
446 fprintf (out_file, "Found expected sequence %u, "
447 "type %u (%s) at block %u\n",
448 sequence, blocktype,
449 type_to_name(blocktype), blocknr);
450 }
451
452 switch (blocktype) {
453 case JFS_DESCRIPTOR_BLOCK:
454 dump_descriptor_block(out_file, source, buf, jsb,
455 &blocknr, blocksize,
456 transaction);
457 continue;
458
459 case JFS_COMMIT_BLOCK:
460 transaction++;
461 blocknr++;
462 WRAP(jsb, blocknr);
463 continue;
464
465 case JFS_REVOKE_BLOCK:
466 dump_revoke_block(out_file, buf, jsb,
467 blocknr, blocksize,
468 transaction);
469 blocknr++;
470 WRAP(jsb, blocknr);
471 continue;
472
473 default:
474 fprintf (out_file, "Unexpected block type %u at "
475 "block %u.\n", blocktype, blocknr);
476 return;
477 }
478 }
479 }
480
journal_super_tag_bytes(journal_superblock_t * jsb)481 static inline size_t journal_super_tag_bytes(journal_superblock_t *jsb)
482 {
483 size_t sz;
484
485 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JFS_FEATURE_INCOMPAT_CSUM_V3))
486 return sizeof(journal_block_tag3_t);
487
488 sz = sizeof(journal_block_tag_t);
489
490 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JFS_FEATURE_INCOMPAT_CSUM_V2))
491 sz += sizeof(__u16);
492
493 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JFS_FEATURE_INCOMPAT_64BIT))
494 return sz;
495
496 return sz - sizeof(__u32);
497 }
498
dump_descriptor_block(FILE * out_file,struct journal_source * source,char * buf,journal_superblock_t * jsb,unsigned int * blockp,int blocksize,tid_t transaction)499 static void dump_descriptor_block(FILE *out_file,
500 struct journal_source *source,
501 char *buf,
502 journal_superblock_t *jsb,
503 unsigned int *blockp, int blocksize,
504 tid_t transaction)
505 {
506 int offset, tag_size, csum_size = 0;
507 char *tagp;
508 journal_block_tag_t *tag;
509 unsigned int blocknr;
510 __u32 tag_block;
511 __u32 tag_flags;
512
513 tag_size = journal_super_tag_bytes(jsb);
514 offset = sizeof(journal_header_t);
515 blocknr = *blockp;
516
517 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JFS_FEATURE_INCOMPAT_CSUM_V3) ||
518 JSB_HAS_INCOMPAT_FEATURE(jsb, JFS_FEATURE_INCOMPAT_CSUM_V2))
519 csum_size = sizeof(struct journal_block_tail);
520
521 if (dump_all)
522 fprintf(out_file, "Dumping descriptor block, sequence %u, at "
523 "block %u:\n", transaction, blocknr);
524
525 ++blocknr;
526 WRAP(jsb, blocknr);
527
528 do {
529 /* Work out the location of the current tag, and skip to
530 * the next one... */
531 tagp = &buf[offset];
532 tag = (journal_block_tag_t *) tagp;
533 offset += tag_size;
534
535 /* ... and if we have gone too far, then we've reached the
536 end of this block. */
537 if (offset > blocksize - csum_size)
538 break;
539
540 tag_block = be32_to_cpu(tag->t_blocknr);
541 tag_flags = be16_to_cpu(tag->t_flags);
542
543 if (!(tag_flags & JFS_FLAG_SAME_UUID))
544 offset += 16;
545
546 dump_metadata_block(out_file, source, jsb,
547 blocknr, tag_block, tag_flags, blocksize,
548 transaction);
549
550 ++blocknr;
551 WRAP(jsb, blocknr);
552
553 } while (!(tag_flags & JFS_FLAG_LAST_TAG));
554
555 *blockp = blocknr;
556 }
557
558
dump_revoke_block(FILE * out_file,char * buf,journal_superblock_t * jsb EXT2FS_ATTR ((unused)),unsigned int blocknr,int blocksize EXT2FS_ATTR ((unused)),tid_t transaction)559 static void dump_revoke_block(FILE *out_file, char *buf,
560 journal_superblock_t *jsb EXT2FS_ATTR((unused)),
561 unsigned int blocknr,
562 int blocksize EXT2FS_ATTR((unused)),
563 tid_t transaction)
564 {
565 int offset, max;
566 journal_revoke_header_t *header;
567 unsigned long long rblock;
568 int tag_size = sizeof(__u32);
569
570 if (dump_all)
571 fprintf(out_file, "Dumping revoke block, sequence %u, at "
572 "block %u:\n", transaction, blocknr);
573
574 if (be32_to_cpu(jsb->s_feature_incompat) & JFS_FEATURE_INCOMPAT_64BIT)
575 tag_size = sizeof(__u64);
576
577 header = (journal_revoke_header_t *) buf;
578 offset = sizeof(journal_revoke_header_t);
579 max = be32_to_cpu(header->r_count);
580
581 while (offset < max) {
582 if (tag_size == sizeof(__u32)) {
583 __u32 *entry = (__u32 *) (buf + offset);
584 rblock = be32_to_cpu(*entry);
585 } else {
586 __u64 *entry = (__u64 *) (buf + offset);
587 rblock = ext2fs_be64_to_cpu(*entry);
588 }
589 if (dump_all || rblock == block_to_dump) {
590 fprintf(out_file, " Revoke FS block %llu", rblock);
591 if (dump_all)
592 fprintf(out_file, "\n");
593 else
594 fprintf(out_file," at block %u, sequence %u\n",
595 blocknr, transaction);
596 }
597 offset += tag_size;
598 }
599 }
600
601
show_extent(FILE * out_file,int start_extent,int end_extent,__u32 first_block)602 static void show_extent(FILE *out_file, int start_extent, int end_extent,
603 __u32 first_block)
604 {
605 if (start_extent >= 0 && first_block != 0)
606 fprintf(out_file, "(%d+%u): %u ",
607 start_extent, end_extent-start_extent, first_block);
608 }
609
show_indirect(FILE * out_file,const char * name,__u32 where)610 static void show_indirect(FILE *out_file, const char *name, __u32 where)
611 {
612 if (where)
613 fprintf(out_file, "(%s): %u ", name, where);
614 }
615
616
dump_metadata_block(FILE * out_file,struct journal_source * source,journal_superblock_t * jsb EXT2FS_ATTR ((unused)),unsigned int log_blocknr,unsigned int fs_blocknr,unsigned int log_tag_flags,int blocksize,tid_t transaction)617 static void dump_metadata_block(FILE *out_file, struct journal_source *source,
618 journal_superblock_t *jsb EXT2FS_ATTR((unused)),
619 unsigned int log_blocknr,
620 unsigned int fs_blocknr,
621 unsigned int log_tag_flags,
622 int blocksize,
623 tid_t transaction)
624 {
625 int retval;
626 char buf[8192];
627
628 if (!(dump_all
629 || (fs_blocknr == block_to_dump)
630 || (fs_blocknr == inode_block_to_dump)
631 || (fs_blocknr == bitmap_to_dump)))
632 return;
633
634 fprintf(out_file, " FS block %u logged at ", fs_blocknr);
635 if (!dump_all)
636 fprintf(out_file, "sequence %u, ", transaction);
637 fprintf(out_file, "journal block %u (flags 0x%x)\n", log_blocknr,
638 log_tag_flags);
639
640 /* There are two major special cases to parse:
641 *
642 * If this block is a block
643 * bitmap block, we need to give it special treatment so that we
644 * can log any allocates and deallocates which affect the
645 * block_to_dump query block.
646 *
647 * If the block is an inode block for the inode being searched
648 * for, then we need to dump the contents of that inode
649 * structure symbolically.
650 */
651
652 if (!(dump_contents && dump_all)
653 && fs_blocknr != block_to_dump
654 && fs_blocknr != bitmap_to_dump
655 && fs_blocknr != inode_block_to_dump)
656 return;
657
658 retval = read_journal_block("logdump", source,
659 ((ext2_loff_t) log_blocknr) * blocksize,
660 buf, blocksize);
661 if (retval)
662 return;
663
664 if (fs_blocknr == bitmap_to_dump) {
665 struct ext2_super_block *super;
666 int offset;
667
668 super = current_fs->super;
669 offset = ((block_to_dump - super->s_first_data_block) %
670 super->s_blocks_per_group);
671
672 fprintf(out_file, " (block bitmap for block %llu: "
673 "block is %s)\n",
674 block_to_dump,
675 ext2fs_test_bit(offset, buf) ? "SET" : "CLEAR");
676 }
677
678 if (fs_blocknr == inode_block_to_dump) {
679 struct ext2_inode *inode;
680 int first, prev, this, start_extent, i;
681
682 fprintf(out_file, " (inode block for inode %u):\n",
683 inode_to_dump);
684
685 inode = (struct ext2_inode *) (buf + inode_offset_to_dump);
686 internal_dump_inode(out_file, " ", inode_to_dump, inode, 0);
687
688 /* Dump out the direct/indirect blocks here:
689 * internal_dump_inode can only dump them from the main
690 * on-disk inode, not from the journaled copy of the
691 * inode. */
692
693 fprintf (out_file, " Blocks: ");
694 first = prev = start_extent = -1;
695
696 for (i=0; i<EXT2_NDIR_BLOCKS; i++) {
697 this = inode->i_block[i];
698 if (start_extent >= 0 && this == prev+1) {
699 prev = this;
700 continue;
701 } else {
702 show_extent(out_file, start_extent, i, first);
703 start_extent = i;
704 first = prev = this;
705 }
706 }
707 show_extent(out_file, start_extent, i, first);
708 show_indirect(out_file, "IND", inode->i_block[i++]);
709 show_indirect(out_file, "DIND", inode->i_block[i++]);
710 show_indirect(out_file, "TIND", inode->i_block[i++]);
711
712 fprintf(out_file, "\n");
713 }
714
715 if (dump_contents)
716 do_hexdump(out_file, buf, blocksize);
717
718 }
719
do_hexdump(FILE * out_file,char * buf,int blocksize)720 static void do_hexdump (FILE *out_file, char *buf, int blocksize)
721 {
722 int i,j;
723 int *intp;
724 char *charp;
725 unsigned char c;
726
727 intp = (int *) buf;
728 charp = (char *) buf;
729
730 for (i=0; i<blocksize; i+=16) {
731 fprintf(out_file, " %04x: ", i);
732 for (j=0; j<16; j+=4)
733 fprintf(out_file, "%08x ", *intp++);
734 for (j=0; j<16; j++) {
735 c = *charp++;
736 if (c < ' ' || c >= 127)
737 c = '.';
738 fprintf(out_file, "%c", c);
739 }
740 fprintf(out_file, "\n");
741 }
742 }
743
744