summaryrefslogtreecommitdiff
path: root/jffsX-utils/jffs2dump.c
blob: 82f31970c7f50aad2b24d8f0a15c5b59dd530ba7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
/*
 *  dumpjffs2.c
 *
 *  Copyright (C) 2003 Thomas Gleixner (tglx@linutronix.de)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Overview:
 *   This utility dumps the contents of a binary JFFS2 image
 *
 *
 * Bug/ToDo:
 */

#define PROGRAM_NAME "jffs2dump"

#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <asm/types.h>
#include <dirent.h>
#include <mtd/jffs2-user.h>
#include <endian.h>
#include <byteswap.h>
#include <getopt.h>
#include <crc32.h>
#include "summary.h"
#include "common.h"

#define PAD(x) (((x)+3)&~3)

/* For outputting a byte-swapped version of the input image. */
#define cnv_e32(x) ((jint32_t){bswap_32(x.v32)})
#define cnv_e16(x) ((jint16_t){bswap_16(x.v16)})

#define t32_backwards(x) ({ uint32_t __b = (x); (target_endian==__BYTE_ORDER)?bswap_32(__b):__b; })
#define cpu_to_e32(x) ((jint32_t){t32_backwards(x)})

// Global variables
long	imglen;		// length of image
char	*data;		// image data

void display_help (void)
{
	printf("Usage: %s [OPTION]... INPUTFILE\n"
	       "Dump the contents of a binary JFFS2 image.\n\n"
	       " -h, --help                   display this help and exit\n"
	       " -V, --version                display version information and exit\n"
	       " -b, --bigendian              image is big endian\n"
	       " -l, --littleendian           image is little endian\n"
	       " -c, --content                dump image contents\n"
	       " -e, --endianconvert=FNAME    convert image endianness, output to file fname\n"
	       " -r, --recalccrc              recalc name and data crc on endian conversion\n"
	       " -d, --datsize=LEN            size of data chunks, when oob data in binary image (NAND only)\n"
	       " -o, --oobsize=LEN            size of oob data chunk in binary image (NAND only)\n"
	       " -v, --verbose                verbose output\n",
	       PROGRAM_NAME);
	exit(0);
}

void display_version (void)
{
	common_print_version();
	printf("Copyright (C) 2003 Thomas Gleixner \n"
			"\n"
			"%1$s comes with NO WARRANTY\n"
			"to the extent permitted by law.\n"
			"\n"
			"You may redistribute copies of %1$s\n"
			"under the terms of the GNU General Public Licence.\n"
			"See the file `COPYING' for more information.\n",
			PROGRAM_NAME);
	exit(0);
}

// Option variables

int 	verbose;		// verbose output
char 	*img;			// filename of image
int	dumpcontent;		// dump image content
int	target_endian = __BYTE_ORDER;	// image endianess
int	convertendian;		// convert endianness
int	recalccrc;		// recalc name and data crc's on endian conversion
char	cnvfile[256];		// filename for conversion output
int	datsize;		// Size of data chunks, when oob data is inside the binary image
int	oobsize;		// Size of oob chunks, when oob data is inside the binary image

void process_options (int argc, char *argv[])
{
	int error = 0;

	for (;;) {
		int option_index = 0;
		static const char *short_options = "blce:rd:o:vVh";
		static const struct option long_options[] = {
			{"help", no_argument, 0, 'h'},
			{"version", no_argument, 0, 'V'},
			{"bigendian", no_argument, 0, 'b'},
			{"littleendian", no_argument, 0, 'l'},
			{"content", no_argument, 0, 'c'},
			{"endianconvert", required_argument, 0, 'e'},
			{"datsize", required_argument, 0, 'd'},
			{"oobsize", required_argument, 0, 'o'},
			{"recalccrc", required_argument, 0, 'r'},
			{"verbose", no_argument, 0, 'v'},
			{0, 0, 0, 0},
		};

		int c = getopt_long(argc, argv, short_options,
				long_options, &option_index);
		if (c == EOF) {
			break;
		}

		switch (c) {
			case 'h':
				display_help();
				break;
			case 'V':
				display_version();
				break;
			case 'v':
				verbose = 1;
				break;
			case 'b':
				target_endian = __BIG_ENDIAN;
				break;
			case 'l':
				target_endian = __LITTLE_ENDIAN;
				break;
			case 'c':
				dumpcontent = 1;
				break;
			case 'd':
				datsize = atoi(optarg);
				break;
			case 'o':
				oobsize = atoi(optarg);
				break;
			case 'e':
				convertendian = 1;
				strcpy (cnvfile, optarg);
				break;
			case 'r':
				recalccrc = 1;
				break;
			case '?':
				error = 1;
				break;
		}
	}

	if ((argc - optind) != 1 || error)
		display_help ();

	img = argv[optind];
}


/*
 *	Dump image contents
 */
void do_dumpcontent (void)
{
	char			*p = data, *p_free_begin;
	union jffs2_node_union 	*node;
	int			empty = 0, dirty = 0;
	char			name[256];
	uint32_t		crc;
	uint16_t		type;
	int			bitchbitmask = 0;
	int			obsolete;

	p_free_begin = NULL;
	while ( p < (data + imglen)) {
		node = (union jffs2_node_union*) p;

		/* Skip empty space */
		if (!p_free_begin)
			p_free_begin = p;
		if (je16_to_cpu (node->u.magic) == 0xFFFF && je16_to_cpu (node->u.nodetype) == 0xFFFF) {
			p += 4;
			empty += 4;
			continue;
		}

		if (p != p_free_begin)
			printf("Empty space found from 0x%08zx to 0x%08zx\n", p_free_begin-data, p-data);
		p_free_begin = NULL;

		if (je16_to_cpu (node->u.magic) != JFFS2_MAGIC_BITMASK)	{
			if (!bitchbitmask++)
				printf ("Wrong bitmask  at  0x%08zx, 0x%04x\n", p - data, je16_to_cpu (node->u.magic));
			p += 4;
			dirty += 4;
			continue;
		}
		bitchbitmask = 0;

		type = je16_to_cpu(node->u.nodetype);
		if ((type & JFFS2_NODE_ACCURATE) != JFFS2_NODE_ACCURATE) {
			obsolete = 1;
			type |= JFFS2_NODE_ACCURATE;
		} else
			obsolete = 0;
		/* Set accurate for CRC check */
		node->u.nodetype = cpu_to_je16(type);

		crc = mtd_crc32 (0, node, sizeof (struct jffs2_unknown_node) - 4);
		if (crc != je32_to_cpu (node->u.hdr_crc)) {
			printf ("Wrong hdr_crc  at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->u.hdr_crc), crc);
			p += 4;
			dirty += 4;
			continue;
		}

		switch(je16_to_cpu(node->u.nodetype)) {

			case JFFS2_NODETYPE_INODE:
				printf ("%8s Inode      node at 0x%08zx, totlen 0x%08x, #ino  %5d, version %5d, isize %8d, csize %8d, dsize %8d, offset %8d\n",
						obsolete ? "Obsolete" : "",
						p - data, je32_to_cpu (node->i.totlen), je32_to_cpu (node->i.ino),
						je32_to_cpu ( node->i.version), je32_to_cpu (node->i.isize),
						je32_to_cpu (node->i.csize), je32_to_cpu (node->i.dsize), je32_to_cpu (node->i.offset));

				crc = mtd_crc32 (0, node, sizeof (struct jffs2_raw_inode) - 8);
				if (crc != je32_to_cpu (node->i.node_crc)) {
					printf ("Wrong node_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->i.node_crc), crc);
					p += PAD(je32_to_cpu (node->i.totlen));
					dirty += PAD(je32_to_cpu (node->i.totlen));;
					continue;
				}

				crc = mtd_crc32(0, p + sizeof (struct jffs2_raw_inode), je32_to_cpu(node->i.csize));
				if (crc != je32_to_cpu(node->i.data_crc)) {
					printf ("Wrong data_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->i.data_crc), crc);
					p += PAD(je32_to_cpu (node->i.totlen));
					dirty += PAD(je32_to_cpu (node->i.totlen));;
					continue;
				}

				p += PAD(je32_to_cpu (node->i.totlen));
				break;

			case JFFS2_NODETYPE_DIRENT:
				memcpy (name, node->d.name, node->d.nsize);
				name [node->d.nsize] = 0x0;
				printf ("%8s Dirent     node at 0x%08zx, totlen 0x%08x, #pino %5d, version %5d, #ino  %8d, nsize %8d, name %s\n",
						obsolete ? "Obsolete" : "",
						p - data, je32_to_cpu (node->d.totlen), je32_to_cpu (node->d.pino),
						je32_to_cpu ( node->d.version), je32_to_cpu (node->d.ino),
						node->d.nsize, name);

				crc = mtd_crc32 (0, node, sizeof (struct jffs2_raw_dirent) - 8);
				if (crc != je32_to_cpu (node->d.node_crc)) {
					printf ("Wrong node_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->d.node_crc), crc);
					p += PAD(je32_to_cpu (node->d.totlen));
					dirty += PAD(je32_to_cpu (node->d.totlen));;
					continue;
				}

				crc = mtd_crc32(0, p + sizeof (struct jffs2_raw_dirent), node->d.nsize);
				if (crc != je32_to_cpu(node->d.name_crc)) {
					printf ("Wrong name_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->d.name_crc), crc);
					p += PAD(je32_to_cpu (node->d.totlen));
					dirty += PAD(je32_to_cpu (node->d.totlen));;
					continue;
				}

				p += PAD(je32_to_cpu (node->d.totlen));
				break;

			case JFFS2_NODETYPE_XATTR:
				memcpy(name, node->x.data, node->x.name_len);
				name[node->x.name_len] = '\x00';
				printf ("%8s Xattr      node at 0x%08zx, totlen 0x%08x, xid   %5d, version %5d, name_len   %3d, name %s\n",
						obsolete ? "Obsolete" : "",
						p - data,
						je32_to_cpu (node->x.totlen),
						je32_to_cpu (node->x.xid),
						je32_to_cpu (node->x.version),
						node->x.name_len,
						name);

				crc = mtd_crc32 (0, node, sizeof (struct jffs2_raw_xattr) - sizeof (node->x.node_crc));
				if (crc != je32_to_cpu (node->x.node_crc)) {
					printf ("Wrong node_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->x.node_crc), crc);
					p += PAD(je32_to_cpu (node->x.totlen));
					dirty += PAD(je32_to_cpu (node->x.totlen));
					continue;
				}

				crc = mtd_crc32 (0, p + sizeof (struct jffs2_raw_xattr), node->x.name_len + je16_to_cpu (node->x.value_len) + 1);
				if (crc != je32_to_cpu (node->x.data_crc)) {
					printf ("Wrong data_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->x.data_crc), crc);
					p += PAD(je32_to_cpu (node->x.totlen));
					dirty += PAD(je32_to_cpu (node->x.totlen));
					continue;
				}
				p += PAD(je32_to_cpu (node->x.totlen));
				break;

			case JFFS2_NODETYPE_XREF:
				printf ("%8s Xref       node at 0x%08zx, totlen 0x%08x, xid   %5d, xseqno  %5d, #ino  %8d\n",
						obsolete ? "Obsolete" : "",
						p - data,
						je32_to_cpu (node->r.totlen),
						je32_to_cpu (node->r.xid),
						je32_to_cpu (node->r.xseqno),
						je32_to_cpu (node->r.ino));
				p += PAD(je32_to_cpu (node->r.totlen));
				break;

			case JFFS2_NODETYPE_SUMMARY: {

											 int i;
											 struct jffs2_sum_marker * sm;

											 printf("%8s Inode Sum  node at 0x%08zx, totlen 0x%08x, sum_num  %5d, cleanmarker size %5d\n",
													 obsolete ? "Obsolete" : "",
													 p - data,
													 je32_to_cpu (node->s.totlen),
													 je32_to_cpu (node->s.sum_num),
													 je32_to_cpu (node->s.cln_mkr));

											 crc = mtd_crc32 (0, node, sizeof (struct jffs2_raw_summary) - 8);
											 if (crc != je32_to_cpu (node->s.node_crc)) {
												 printf ("Wrong node_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->s.node_crc), crc);
												 p += PAD(je32_to_cpu (node->s.totlen));
												 dirty += PAD(je32_to_cpu (node->s.totlen));;
												 continue;
											 }

											 crc = mtd_crc32(0, p + sizeof (struct jffs2_raw_summary),  je32_to_cpu (node->s.totlen) - sizeof(struct jffs2_raw_summary));
											 if (crc != je32_to_cpu(node->s.sum_crc)) {
												 printf ("Wrong data_crc at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->s.sum_crc), crc);
												 p += PAD(je32_to_cpu (node->s.totlen));
												 dirty += PAD(je32_to_cpu (node->s.totlen));;
												 continue;
											 }

											 if (verbose) {
												 void *sp;
												 sp = (p + sizeof(struct jffs2_raw_summary));

												 for(i=0; i<je32_to_cpu(node->s.sum_num); i++) {

													 switch(je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
														 case JFFS2_NODETYPE_INODE : {

																						 struct jffs2_sum_inode_flash *spi;
																						 spi = sp;

																						 printf ("%14s #ino  %5d,  version %5d, offset 0x%08x, totlen 0x%08x\n",
																								 "",
																								 je32_to_cpu (spi->inode),
																								 je32_to_cpu (spi->version),
																								 je32_to_cpu (spi->offset),
																								 je32_to_cpu (spi->totlen));

																						 sp += JFFS2_SUMMARY_INODE_SIZE;
																						 break;
																					 }

														 case JFFS2_NODETYPE_DIRENT : {

																						  char name[255];
																						  struct jffs2_sum_dirent_flash *spd;
																						  spd = sp;

																						  memcpy(name,spd->name,spd->nsize);
																						  name [spd->nsize] = 0x0;

																						  printf ("%14s dirent offset 0x%08x, totlen 0x%08x, #pino  %5d,  version %5d, #ino  %8d, nsize %8d, name %s \n",
																								  "",
																								  je32_to_cpu (spd->offset),
																								  je32_to_cpu (spd->totlen),
																								  je32_to_cpu (spd->pino),
																								  je32_to_cpu (spd->version),
																								  je32_to_cpu (spd->ino),
																								  spd->nsize,
																								  name);

																						  sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
																						  break;
																					  }

														 case JFFS2_NODETYPE_XATTR : {
																						  struct jffs2_sum_xattr_flash *spx;
																						  spx = sp;
																						  printf ("%14s Xattr  offset 0x%08x, totlen 0x%08x, version %5d, #xid %8d\n",
																								  "",
																								  je32_to_cpu (spx->offset),
																								  je32_to_cpu (spx->totlen),
																								  je32_to_cpu (spx->version),
																								  je32_to_cpu (spx->xid));
																						  sp += JFFS2_SUMMARY_XATTR_SIZE;
																						  break;
																					  }

														 case JFFS2_NODETYPE_XREF : {
																						  struct jffs2_sum_xref_flash *spr;
																						  spr = sp;
																						  printf ("%14s Xref   offset 0x%08x\n",
																								  "",
																								  je32_to_cpu (spr->offset));
																						  sp += JFFS2_SUMMARY_XREF_SIZE;
																						  break;
																					  }

														 default :
																					  printf("Unknown summary node!\n");
																					  break;
													 }
												 }

												 sm = (struct jffs2_sum_marker *) ((char *)p + je32_to_cpu(node->s.totlen) - sizeof(struct jffs2_sum_marker));

												 printf("%14s Sum Node Offset  0x%08x, Magic 0x%08x, Padded size 0x%08x\n",
														 "",
														 je32_to_cpu(sm->offset),
														 je32_to_cpu(sm->magic),
														 je32_to_cpu(node->s.padded));
											 }

											 p += PAD(je32_to_cpu (node->s.totlen));
											 break;
										 }

			case JFFS2_NODETYPE_CLEANMARKER:
										 if (verbose) {
											 printf ("%8s Cleanmarker     at 0x%08zx, totlen 0x%08x\n",
													 obsolete ? "Obsolete" : "",
													 p - data, je32_to_cpu (node->u.totlen));
										 }
										 p += PAD(je32_to_cpu (node->u.totlen));
										 break;

			case JFFS2_NODETYPE_PADDING:
										 if (verbose) {
											 printf ("%8s Padding    node at 0x%08zx, totlen 0x%08x\n",
													 obsolete ? "Obsolete" : "",
													 p - data, je32_to_cpu (node->u.totlen));
										 }
										 p += PAD(je32_to_cpu (node->u.totlen));
										 break;

			case 0xffff:
										 p += 4;
										 empty += 4;
										 break;

			default:
										 if (verbose) {
											 printf ("%8s Unknown    node at 0x%08zx, totlen 0x%08x\n",
													 obsolete ? "Obsolete" : "",
													 p - data, je32_to_cpu (node->u.totlen));
										 }
										 p += PAD(je32_to_cpu (node->u.totlen));
										 dirty += PAD(je32_to_cpu (node->u.totlen));

		}
	}

	if (verbose)
		printf ("Empty space: %d, dirty space: %d\n", empty, dirty);
}

/*
 *	Convert endianess
 */
void do_endianconvert (void)
{
	char			*p = data;
	union jffs2_node_union 	*node, newnode;
	int			fd, len;
	jint32_t		mode;
	uint32_t		crc;

	fd = open (cnvfile, O_WRONLY | O_CREAT, 0644);
	if (fd < 0) {
		fprintf (stderr, "Cannot open / create file: %s\n", cnvfile);
		return;
	}

	while ( p < (data + imglen)) {
		node = (union jffs2_node_union*) p;

		/* Skip empty space */
		if (je16_to_cpu (node->u.magic) == 0xFFFF && je16_to_cpu (node->u.nodetype) == 0xFFFF) {
			write_nocheck (fd, p, 4);
			p += 4;
			continue;
		}

		if (je16_to_cpu (node->u.magic) != JFFS2_MAGIC_BITMASK)	{
			printf ("Wrong bitmask  at  0x%08zx, 0x%04x\n", p - data, je16_to_cpu (node->u.magic));
			newnode.u.magic = cnv_e16 (node->u.magic);
			newnode.u.nodetype = cnv_e16 (node->u.nodetype);
			write_nocheck (fd, &newnode, 4);
			p += 4;
			continue;
		}

		crc = mtd_crc32 (0, node, sizeof (struct jffs2_unknown_node) - 4);
		if (crc != je32_to_cpu (node->u.hdr_crc)) {
			printf ("Wrong hdr_crc  at  0x%08zx, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->u.hdr_crc), crc);
		}

		switch(je16_to_cpu(node->u.nodetype)) {

			case JFFS2_NODETYPE_INODE:

				newnode.i.magic = cnv_e16 (node->i.magic);
				newnode.i.nodetype = cnv_e16 (node->i.nodetype);
				newnode.i.totlen = cnv_e32 (node->i.totlen);
				newnode.i.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
				newnode.i.ino = cnv_e32 (node->i.ino);
				newnode.i.version = cnv_e32 (node->i.version);
				mode.v32 = node->i.mode.m;
				mode = cnv_e32 (mode);
				newnode.i.mode.m = mode.v32;
				newnode.i.uid = cnv_e16 (node->i.uid);
				newnode.i.gid = cnv_e16 (node->i.gid);
				newnode.i.isize = cnv_e32 (node->i.isize);
				newnode.i.atime = cnv_e32 (node->i.atime);
				newnode.i.mtime = cnv_e32 (node->i.mtime);
				newnode.i.ctime = cnv_e32 (node->i.ctime);
				newnode.i.offset = cnv_e32 (node->i.offset);
				newnode.i.csize = cnv_e32 (node->i.csize);
				newnode.i.dsize = cnv_e32 (node->i.dsize);
				newnode.i.compr = node->i.compr;
				newnode.i.usercompr = node->i.usercompr;
				newnode.i.flags = cnv_e16 (node->i.flags);
				if (recalccrc) {
					len = je32_to_cpu(node->i.csize);
					newnode.i.data_crc = cpu_to_e32 ( mtd_crc32(0, p + sizeof (struct jffs2_raw_inode), len));
				} else
					newnode.i.data_crc = cnv_e32 (node->i.data_crc);

				newnode.i.node_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_raw_inode) - 8));

				write_nocheck (fd, &newnode, sizeof (struct jffs2_raw_inode));
				write_nocheck (fd, p + sizeof (struct jffs2_raw_inode), PAD (je32_to_cpu (node->i.totlen) -  sizeof (struct jffs2_raw_inode)));

				p += PAD(je32_to_cpu (node->i.totlen));
				break;

			case JFFS2_NODETYPE_DIRENT:
				newnode.d.magic = cnv_e16 (node->d.magic);
				newnode.d.nodetype = cnv_e16 (node->d.nodetype);
				newnode.d.totlen = cnv_e32 (node->d.totlen);
				newnode.d.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
				newnode.d.pino = cnv_e32 (node->d.pino);
				newnode.d.version = cnv_e32 (node->d.version);
				newnode.d.ino = cnv_e32 (node->d.ino);
				newnode.d.mctime = cnv_e32 (node->d.mctime);
				newnode.d.nsize = node->d.nsize;
				newnode.d.type = node->d.type;
				newnode.d.unused[0] = node->d.unused[0];
				newnode.d.unused[1] = node->d.unused[1];
				newnode.d.node_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_raw_dirent) - 8));
				if (recalccrc)
					newnode.d.name_crc = cpu_to_e32 ( mtd_crc32(0, p + sizeof (struct jffs2_raw_dirent), node->d.nsize));
				else
					newnode.d.name_crc = cnv_e32 (node->d.name_crc);

				write_nocheck (fd, &newnode, sizeof (struct jffs2_raw_dirent));
				write_nocheck (fd, p + sizeof (struct jffs2_raw_dirent), PAD (je32_to_cpu (node->d.totlen) -  sizeof (struct jffs2_raw_dirent)));
				p += PAD(je32_to_cpu (node->d.totlen));
				break;

			case JFFS2_NODETYPE_XATTR:
				newnode.x.magic = cnv_e16 (node->x.magic);
				newnode.x.nodetype = cnv_e16 (node->x.nodetype);
				newnode.x.totlen = cnv_e32 (node->x.totlen);
				newnode.x.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
				newnode.x.xid = cnv_e32 (node->x.xid);
				newnode.x.version = cnv_e32 (node->x.version);
				newnode.x.xprefix = node->x.xprefix;
				newnode.x.name_len = node->x.name_len;
				newnode.x.value_len = cnv_e16 (node->x.value_len);
				if (recalccrc)
					newnode.x.data_crc = cpu_to_e32 (mtd_crc32 (0, p + sizeof (struct jffs2_raw_xattr), node->x.name_len + je16_to_cpu (node->x.value_len) + 1));
				else
					newnode.x.data_crc = cnv_e32 (node->x.data_crc);
				newnode.x.node_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_raw_xattr) - sizeof (newnode.x.node_crc)));

				write_nocheck (fd, &newnode, sizeof (struct jffs2_raw_xattr));
				write_nocheck (fd, p + sizeof (struct jffs2_raw_xattr), PAD (je32_to_cpu (node->d.totlen) -  sizeof (struct jffs2_raw_xattr)));
				p += PAD(je32_to_cpu (node->x.totlen));
				break;

			case JFFS2_NODETYPE_XREF:
				newnode.r.magic = cnv_e16 (node->r.magic);
				newnode.r.nodetype = cnv_e16 (node->r.nodetype);
				newnode.r.totlen = cnv_e32 (node->r.totlen);
				newnode.r.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - sizeof (newnode.r.hdr_crc)));
				newnode.r.ino = cnv_e32 (node->r.ino);
				newnode.r.xid = cnv_e32 (node->r.xid);
				newnode.r.xseqno = cnv_e32 (node->r.xseqno);
				newnode.r.node_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_raw_xref) - sizeof (newnode.r.node_crc)));
				p += PAD(je32_to_cpu (node->x.totlen));
				break;

			case JFFS2_NODETYPE_CLEANMARKER:
			case JFFS2_NODETYPE_PADDING:
				newnode.u.magic = cnv_e16 (node->u.magic);
				newnode.u.nodetype = cnv_e16 (node->u.nodetype);
				newnode.u.totlen = cnv_e32 (node->u.totlen);
				newnode.u.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));

				write_nocheck (fd, &newnode, sizeof (struct jffs2_unknown_node));
				len = PAD(je32_to_cpu (node->u.totlen) - sizeof (struct jffs2_unknown_node));
				if (len > 0)
					write_nocheck (fd, p + sizeof (struct jffs2_unknown_node), len);

				p += PAD(je32_to_cpu (node->u.totlen));
				break;

			case JFFS2_NODETYPE_SUMMARY : {
											  struct jffs2_sum_marker *sm_ptr;
											  int i,sum_len;
											  int counter = 0;

											  newnode.s.magic = cnv_e16 (node->s.magic);
											  newnode.s.nodetype = cnv_e16 (node->s.nodetype);
											  newnode.s.totlen = cnv_e32 (node->s.totlen);
											  newnode.s.hdr_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
											  newnode.s.sum_num = cnv_e32 (node->s.sum_num);
											  newnode.s.cln_mkr = cnv_e32 (node->s.cln_mkr);
											  newnode.s.padded = cnv_e32 (node->s.padded);

											  newnode.s.node_crc = cpu_to_e32 (mtd_crc32 (0, &newnode, sizeof (struct jffs2_raw_summary) - 8));

											  // summary header
											  p += sizeof (struct jffs2_raw_summary);

											  // summary data
											  sum_len = je32_to_cpu (node->s.totlen) - sizeof (struct jffs2_raw_summary) - sizeof (struct jffs2_sum_marker);

											  for (i=0; i<je32_to_cpu (node->s.sum_num); i++) {
												  union jffs2_sum_flash *fl_ptr;

												  fl_ptr = (union jffs2_sum_flash *) p;

												  switch (je16_to_cpu (fl_ptr->u.nodetype)) {
													  case JFFS2_NODETYPE_INODE:

														  fl_ptr->i.nodetype = cnv_e16 (fl_ptr->i.nodetype);
														  fl_ptr->i.inode = cnv_e32 (fl_ptr->i.inode);
														  fl_ptr->i.version = cnv_e32 (fl_ptr->i.version);
														  fl_ptr->i.offset = cnv_e32 (fl_ptr->i.offset);
														  fl_ptr->i.totlen = cnv_e32 (fl_ptr->i.totlen);
														  p += sizeof (struct jffs2_sum_inode_flash);
														  counter += sizeof (struct jffs2_sum_inode_flash);
														  break;

													  case JFFS2_NODETYPE_DIRENT:
														  fl_ptr->d.nodetype = cnv_e16 (fl_ptr->d.nodetype);
														  fl_ptr->d.totlen = cnv_e32 (fl_ptr->d.totlen);
														  fl_ptr->d.offset = cnv_e32 (fl_ptr->d.offset);
														  fl_ptr->d.pino = cnv_e32 (fl_ptr->d.pino);
														  fl_ptr->d.version = cnv_e32 (fl_ptr->d.version);
														  fl_ptr->d.ino = cnv_e32 (fl_ptr->d.ino);
														  p += sizeof (struct jffs2_sum_dirent_flash) + fl_ptr->d.nsize;
														  counter += sizeof (struct jffs2_sum_dirent_flash) + fl_ptr->d.nsize;
														  break;

													  case JFFS2_NODETYPE_XATTR:
														  fl_ptr->x.nodetype = cnv_e16 (fl_ptr->x.nodetype);
														  fl_ptr->x.xid = cnv_e32 (fl_ptr->x.xid);
														  fl_ptr->x.version = cnv_e32 (fl_ptr->x.version);
														  fl_ptr->x.offset = cnv_e32 (fl_ptr->x.offset);
														  fl_ptr->x.totlen = cnv_e32 (fl_ptr->x.totlen);
														  p += sizeof (struct jffs2_sum_xattr_flash);
														  counter += sizeof (struct jffs2_sum_xattr_flash);
														  break;

													  case JFFS2_NODETYPE_XREF:
														  fl_ptr->r.nodetype = cnv_e16 (fl_ptr->r.nodetype);
														  fl_ptr->r.offset = cnv_e32 (fl_ptr->r.offset);
														  p += sizeof (struct jffs2_sum_xref_flash);
														  counter += sizeof (struct jffs2_sum_xref_flash);
														  break;

													  default :
														  printf("Unknown node in summary information!!! nodetype(%x)\n", je16_to_cpu (fl_ptr->u.nodetype));
														  exit(EXIT_FAILURE);
														  break;
												  }

											  }

											  //pad
											  p += sum_len - counter;

											  // summary marker
											  sm_ptr = (struct jffs2_sum_marker *) p;
											  sm_ptr->offset = cnv_e32 (sm_ptr->offset);
											  sm_ptr->magic = cnv_e32 (sm_ptr->magic);
											  p += sizeof (struct jffs2_sum_marker);

											  // generate new crc on sum data
											  newnode.s.sum_crc = cpu_to_e32 ( mtd_crc32(0, ((char *) node) + sizeof (struct jffs2_raw_summary),
														  je32_to_cpu (node->s.totlen) - sizeof (struct jffs2_raw_summary)));

											  // write out new node header
											  write_nocheck(fd, &newnode, sizeof (struct jffs2_raw_summary));
											  // write out new summary data
											  write_nocheck(fd, &node->s.sum, sum_len + sizeof (struct jffs2_sum_marker));

											  break;
										  }

			case 0xffff:
										  write_nocheck (fd, p, 4);
										  p += 4;
										  break;

			default:
										  printf ("Unknown node type: 0x%04x at 0x%08zx, totlen 0x%08x\n", je16_to_cpu (node->u.nodetype), p - data, je32_to_cpu (node->u.totlen));
										  p += PAD(je32_to_cpu (node->u.totlen));

		}
	}

	close (fd);

}

/*
 * Main program
 */
int main(int argc, char **argv)
{
	int fd;

	process_options(argc, argv);

	/* Open the input file */
	if ((fd = open(img, O_RDONLY)) == -1) {
		perror("open input file");
		exit(EXIT_FAILURE);
	}

	// get image length
	imglen = lseek(fd, 0, SEEK_END);
	lseek (fd, 0, SEEK_SET);

	data = malloc (imglen);
	if (!data) {
		perror("out of memory");
		close (fd);
		exit(EXIT_FAILURE);
	}

	if (datsize && oobsize) {
		int  idx = 0;
		long len = imglen;
		uint8_t oob[oobsize];
		printf ("Peeling data out of combined data/oob image\n");
		while (len) {
			// read image data
			read_nocheck (fd, &data[idx], datsize);
			read_nocheck (fd, oob, oobsize);
			idx += datsize;
			imglen -= oobsize;
			len -= datsize + oobsize;
		}

	} else {
		// read image data
		read_nocheck (fd, data, imglen);
	}
	// Close the input file
	close(fd);

	if (dumpcontent)
		do_dumpcontent ();

	if (convertendian)
		do_endianconvert ();

	// free memory
	free (data);

	// Return happy
	exit (EXIT_SUCCESS);
}