path: root/sumtool.c

/*
 *  sumtool.c
 *
 *  Copyright (C) 2004 Zoltan Sogor <weth@inf.u-szeged.hu>,
 *                     Ferenc Havasi <havasi@inf.u-szeged.hu>
 *                     University of Szeged, Hungary
 *                2006 KaiGai Kohei <kaigai@ak.jp.nec.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Overview:
 *   This is a utility insert summary information into JFFS2 image for
 *   faster mount time
 *
 */

#define PROGRAM_NAME "sumtool"

#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.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"

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

static struct jffs2_summary *sum_collected = NULL;

static int verbose = 0;
static int padto = 0;				/* pad the output with 0xFF to the end of the final eraseblock */
static int add_cleanmarkers = 1;		/* add cleanmarker to output */
static int use_input_cleanmarker_size = 1;	/* use input file's cleanmarker size (default) */
static int found_cleanmarkers = 0;		/* cleanmarker found in input file */
static struct jffs2_unknown_node cleanmarker;
static int cleanmarker_size = sizeof(cleanmarker);
static const char *short_options = "o:i:e:hvVblnc:p";
static int erase_block_size = 65536;
static int out_fd = -1;
static int in_fd = -1;

static uint8_t *data_buffer = NULL; 		/* buffer for inodes */
static unsigned int data_ofs = 0;	 	/* inode buffer offset */

static uint8_t *file_buffer = NULL;		/* file buffer contains the actual erase block*/
static unsigned int file_ofs = 0;		/* position in the buffer */

int target_endian = __BYTE_ORDER;

static struct option long_options[] = {
	{"output", 1, NULL, 'o'},
	{"input", 1, NULL, 'i'},
	{"eraseblock", 1, NULL, 'e'},
	{"help", 0, NULL, 'h'},
	{"verbose", 0, NULL, 'v'},
	{"version", 0, NULL, 'V'},
	{"bigendian", 0, NULL, 'b'},
	{"littleendian", 0, NULL, 'l'},
	{"no-cleanmarkers", 0, NULL, 'n'},
	{"cleanmarker", 1, NULL, 'c'},
	{"pad", 0, NULL, 'p'},
	{NULL, 0, NULL, 0}
};

static const char helptext[] =
"Usage: sumtool [OPTIONS] -i inputfile -o outputfile\n\n"
"Convert the input JFFS2 image to a summarized JFFS2 image\n"
"Summary makes mounting faster - if summary support enabled in your kernel\n\n"
"Options:\n"
"  -e, --eraseblock=SIZE     Use erase block size SIZE (default: 64KiB)\n"
"                            (usually 16KiB on NAND)\n"
"  -c, --cleanmarker=SIZE    Size of cleanmarker (default 12).\n"
"                            (usually 16 bytes on NAND, and will be set to\n"
"                            this value if left at the default 12). Will be\n"
"                            stored in OOB after each physical page composing\n"
"                            a physical eraseblock.\n"
"  -n, --no-cleanmarkers     Don't add a cleanmarker to every eraseblock\n"
"  -o, --output=FILE         Output to FILE \n"
"  -i, --input=FILE          Input from FILE \n"
"  -b, --bigendian           Image is big endian\n"
"  -l  --littleendian        Image is little endian\n"
"  -h, --help                Display this help text\n"
"  -v, --verbose             Verbose operation\n"
"  -V, --version             Display version information\n"
"  -p, --pad                 Pad the OUTPUT with 0xFF to the end of the final\n"
"                            eraseblock\n\n";


static const char revtext[] = "$Revision: 1.9 $";

static unsigned char ffbuf[16] = {
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};

static void verror_msg(const char *s, va_list p)
{
	fflush(stdout);
	fprintf(stderr, "%s: ", PROGRAM_NAME);
	vfprintf(stderr, s, p);
}

static void error_msg_and_die(const char *s, ...)
{
	va_list p;

	va_start(p, s);
	verror_msg(s, p);
	va_end(p);
	putc('\n', stderr);
	exit(EXIT_FAILURE);
}

static void vperror_msg(const char *s, va_list p)
{
	int err = errno;

	if (s == 0)
		s = "";
	verror_msg(s, p);
	if (*s)
		s = ": ";
	fprintf(stderr, "%s%s\n", s, strerror(err));
}

static void perror_msg_and_die(const char *s, ...)
{
	va_list p;

	va_start(p, s);
	vperror_msg(s, p);
	va_end(p);
	exit(EXIT_FAILURE);
}



static void full_write(void *target_buff, const void *buf, int len);

void setup_cleanmarker()
{
	cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
	cleanmarker.totlen = cpu_to_je32(cleanmarker_size);
	cleanmarker.hdr_crc = cpu_to_je32(mtd_crc32(0, &cleanmarker, sizeof(struct jffs2_unknown_node)-4));
}

void process_options (int argc, char **argv)
{
	int opt,c;

	while ((opt = getopt_long(argc, argv, short_options, long_options, &c)) >= 0) {
		switch (opt) {
			case 'o':
				if (out_fd != -1)
					error_msg_and_die("output filename specified more than once");
				out_fd = open(optarg, O_CREAT | O_TRUNC | O_RDWR, 0644);
				if (out_fd == -1)
					perror_msg_and_die("open output file");
				break;

			case 'i':
				if (in_fd != -1)
					error_msg_and_die("input filename specified more than once");
				in_fd = open(optarg, O_RDONLY);
				if (in_fd == -1)
					perror_msg_and_die("open input file");
				break;
			case 'b':
				target_endian = __BIG_ENDIAN;
				break;
			case 'l':
				target_endian = __LITTLE_ENDIAN;
				break;
			case 'h':
			case '?':
				error_msg_and_die(helptext);
			case 'v':
				verbose = 1;
				break;

			case 'V':
				error_msg_and_die("revision %.*s\n",
						(int) strlen(revtext) - 13, revtext + 11);

			case 'e': {
						  char *next;
						  unsigned units = 0;
						  erase_block_size = strtol(optarg, &next, 0);
						  if (!erase_block_size)
							  error_msg_and_die("Unrecognisable erase size\n");

						  if (*next) {
							  if (!strcmp(next, "KiB")) {
								  units = 1024;
							  } else if (!strcmp(next, "MiB")) {
								  units = 1024 * 1024;
							  } else {
								  error_msg_and_die("Unknown units in erasesize\n");
							  }
						  } else {
							  if (erase_block_size < 0x1000)
								  units = 1024;
							  else
								  units = 1;
						  }
						  erase_block_size *= units;

						  /* If it's less than 8KiB, they're not allowed */
						  if (erase_block_size < 0x2000) {
							  fprintf(stderr, "Erase size 0x%x too small. Increasing to 8KiB minimum\n",
									  erase_block_size);
							  erase_block_size = 0x2000;
						  }
						  break;
					  }

			case 'n':
					  add_cleanmarkers = 0;
					  break;
			case 'c':
					  cleanmarker_size = strtol(optarg, NULL, 0);

					  if (cleanmarker_size < sizeof(cleanmarker)) {
						  error_msg_and_die("cleanmarker size must be >= 12");
					  }
					  if (cleanmarker_size >= erase_block_size) {
						  error_msg_and_die("cleanmarker size must be < eraseblock size");
					  }

					  use_input_cleanmarker_size = 0;
					  found_cleanmarkers = 1;
					  setup_cleanmarker();

					  break;
			case 'p':
					  padto = 1;
					  break;
		}
	}
}


void init_buffers()
{
	data_buffer = malloc(erase_block_size);

	if (!data_buffer) {
		perror("out of memory");
		close (in_fd);
		close (out_fd);
		exit(1);
	}

	file_buffer = malloc(erase_block_size);

	if (!file_buffer) {
		perror("out of memory");
		close (in_fd);
		close (out_fd);
		exit(1);
	}
}

void init_sumlist()
{
	sum_collected = (struct jffs2_summary *) malloc (sizeof(struct jffs2_summary));

	if (!sum_collected)
		error_msg_and_die("Can't allocate memory for jffs2_summary!\n");

	memset(sum_collected, 0, sizeof(struct jffs2_summary));
}

void clean_buffers()
{
	if (data_buffer)
		free(data_buffer);
	if (file_buffer)
		free(file_buffer);
}

void clean_sumlist()
{
	union jffs2_sum_mem *temp;

	if (sum_collected) {

		while (sum_collected->sum_list_head) {
			temp = sum_collected->sum_list_head;
			sum_collected->sum_list_head = sum_collected->sum_list_head->u.next;
			free(temp);
			sum_collected->sum_num--;
		}

		if (sum_collected->sum_num != 0)
			printf("Ooops, something wrong happened! sum_num != 0, but sum_list = null ???");

		free(sum_collected);
	}
}

int load_next_block()
{
	int ret;
	ret = read(in_fd, file_buffer, erase_block_size);
	file_ofs = 0;

	if (verbose)
		printf("Load next block : %d bytes read\n",ret);

	return ret;
}

void write_buff_to_file()
{
	int ret;
	int len = data_ofs;

	uint8_t *buf = NULL;

	buf = data_buffer;
	while (len > 0) {
		ret = write(out_fd, buf, len);

		if (ret < 0)
			perror_msg_and_die("write");

		if (ret == 0)
			perror_msg_and_die("write returned zero");

		len -= ret;
		buf += ret;
	}

	data_ofs = 0;
}

void dump_sum_records()
{

	struct jffs2_raw_summary isum;
	struct jffs2_sum_marker *sm;
	union jffs2_sum_mem *temp;
	jint32_t offset;
	jint32_t *tpage;
	void *wpage;
	int datasize, infosize, padsize;
	jint32_t magic = cpu_to_je32(JFFS2_SUM_MAGIC);

	if (!sum_collected->sum_num || !sum_collected->sum_list_head)
		return;

	datasize = sum_collected->sum_size + sizeof(struct jffs2_sum_marker);
	infosize = sizeof(struct jffs2_raw_summary) + datasize;
	padsize = erase_block_size - data_ofs - infosize;
	infosize += padsize; datasize += padsize;
	offset = cpu_to_je32(data_ofs);

	tpage = (jint32_t *) malloc(datasize);

	if(!tpage)
		error_msg_and_die("Can't allocate memory to dump summary information!\n");

	memset(tpage, 0xff, datasize);
	memset(&isum, 0, sizeof(isum));

	isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
	isum.totlen = cpu_to_je32(infosize);
	isum.hdr_crc = cpu_to_je32(mtd_crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
	isum.padded = cpu_to_je32(0);

	if (add_cleanmarkers && found_cleanmarkers) {
		isum.cln_mkr = cpu_to_je32(cleanmarker_size);
	} else {
		isum.cln_mkr = cpu_to_je32(0);
	}

	isum.sum_num = cpu_to_je32(sum_collected->sum_num);
	wpage = tpage;

	while (sum_collected->sum_num) {
		switch(je16_to_cpu(sum_collected->sum_list_head->u.nodetype)) {

			case JFFS2_NODETYPE_INODE : {
											struct jffs2_sum_inode_flash *sino_ptr = wpage;

											sino_ptr->nodetype = sum_collected->sum_list_head->i.nodetype;
											sino_ptr->inode = sum_collected->sum_list_head->i.inode;
											sino_ptr->version = sum_collected->sum_list_head->i.version;
											sino_ptr->offset = sum_collected->sum_list_head->i.offset;
											sino_ptr->totlen = sum_collected->sum_list_head->i.totlen;

											wpage += JFFS2_SUMMARY_INODE_SIZE;
											break;
										}

			case JFFS2_NODETYPE_DIRENT : {
											 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;

											 sdrnt_ptr->nodetype = sum_collected->sum_list_head->d.nodetype;
											 sdrnt_ptr->totlen = sum_collected->sum_list_head->d.totlen;
											 sdrnt_ptr->offset = sum_collected->sum_list_head->d.offset;
											 sdrnt_ptr->pino = sum_collected->sum_list_head->d.pino;
											 sdrnt_ptr->version = sum_collected->sum_list_head->d.version;
											 sdrnt_ptr->ino = sum_collected->sum_list_head->d.ino;
											 sdrnt_ptr->nsize = sum_collected->sum_list_head->d.nsize;
											 sdrnt_ptr->type = sum_collected->sum_list_head->d.type;

											 memcpy(sdrnt_ptr->name, sum_collected->sum_list_head->d.name,
													 sum_collected->sum_list_head->d.nsize);

											 wpage += JFFS2_SUMMARY_DIRENT_SIZE(sum_collected->sum_list_head->d.nsize);
											 break;
										 }

			case JFFS2_NODETYPE_XATTR: {
										   struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;

										   sxattr_ptr->nodetype = sum_collected->sum_list_head->x.nodetype;
										   sxattr_ptr->xid = sum_collected->sum_list_head->x.xid;
										   sxattr_ptr->version = sum_collected->sum_list_head->x.version;
										   sxattr_ptr->offset = sum_collected->sum_list_head->x.offset;
										   sxattr_ptr->totlen = sum_collected->sum_list_head->x.totlen;

										   wpage += JFFS2_SUMMARY_XATTR_SIZE;
										   break;
									   }

			case JFFS2_NODETYPE_XREF: {
										  struct jffs2_sum_xref_flash *sxref_ptr = wpage;

										  sxref_ptr->nodetype = sum_collected->sum_list_head->r.nodetype;
										  sxref_ptr->offset = sum_collected->sum_list_head->r.offset;

										  wpage += JFFS2_SUMMARY_XREF_SIZE;
										  break;
									  }

			default : {
						  printf("Unknown node type!\n");
					  }
		}

		temp = sum_collected->sum_list_head;
		sum_collected->sum_list_head = sum_collected->sum_list_head->u.next;
		free(temp);

		sum_collected->sum_num--;
	}

	sum_collected->sum_size = 0;
	sum_collected->sum_num = 0;
	sum_collected->sum_list_tail = NULL;

	wpage += padsize;

	sm = wpage;
	sm->offset = offset;
	sm->magic = magic;

	isum.sum_crc = cpu_to_je32(mtd_crc32(0, tpage, datasize));
	isum.node_crc = cpu_to_je32(mtd_crc32(0, &isum, sizeof(isum) - 8));

	full_write(data_buffer + data_ofs, &isum, sizeof(isum));
	full_write(data_buffer + data_ofs, tpage, datasize);

	free(tpage);
}

static void full_write(void *target_buff, const void *buf, int len)
{
	memcpy(target_buff, buf, len);
	data_ofs += len;
}

static void pad(int req)
{
	while (req) {
		if (req > sizeof(ffbuf)) {
			full_write(data_buffer + data_ofs, ffbuf, sizeof(ffbuf));
			req -= sizeof(ffbuf);
		} else {
			full_write(data_buffer + data_ofs, ffbuf, req);
			req = 0;
		}
	}
}

static inline void padword()
{
	if (data_ofs % 4)
		full_write(data_buffer + data_ofs, ffbuf, 4 - (data_ofs % 4));
}


static inline void pad_block_if_less_than(int req,int plus)
{

	int datasize = req + plus + sum_collected->sum_size + sizeof(struct jffs2_raw_summary) + 8;
	datasize += (4 - (datasize % 4)) % 4;

	if (data_ofs + req > erase_block_size - datasize) {
		dump_sum_records();
		write_buff_to_file();
	}

	if (add_cleanmarkers && found_cleanmarkers) {
		if (!data_ofs) {
			full_write(data_buffer, &cleanmarker, sizeof(cleanmarker));
			pad(cleanmarker_size - sizeof(cleanmarker));
			padword();
		}
	}
}

void flush_buffers()
{

	if ((add_cleanmarkers == 1) && (found_cleanmarkers == 1)) { /* CLEANMARKER */
		if (data_ofs != cleanmarker_size) {	/* INODE BUFFER */

			int datasize = sum_collected->sum_size + sizeof(struct jffs2_raw_summary) + 8;
			datasize += (4 - (datasize % 4)) % 4;

			/* If we have a full inode buffer, then write out inode and summary data  */
			if (data_ofs + sizeof(struct jffs2_raw_inode) + 2*JFFS2_MIN_DATA_LEN > erase_block_size - datasize) {
				dump_sum_records();
				write_buff_to_file();
			} else {	/* else just write out inode data */
				if (padto)
					pad(erase_block_size - data_ofs);
				write_buff_to_file();
			}
		}
	} else { /* NO CLEANMARKER */
		if (data_ofs != 0) { /* INODE BUFFER */

			int datasize = sum_collected->sum_size + sizeof(struct jffs2_raw_summary) + 8;
			datasize += (4 - (datasize % 4)) % 4;

			/* If we have a full inode buffer, then write out inode and summary data */
			if (data_ofs + sizeof(struct jffs2_raw_inode) + 2*JFFS2_MIN_DATA_LEN > erase_block_size - datasize) {
				dump_sum_records();
				write_buff_to_file();
			} else {	/* Else just write out inode data */
				if(padto)
					pad(erase_block_size - data_ofs);
				write_buff_to_file();
			}
		}
	}
}

int add_sum_mem(union jffs2_sum_mem *item)
{

	if (!sum_collected->sum_list_head)
		sum_collected->sum_list_head = (union jffs2_sum_mem *) item;
	if (sum_collected->sum_list_tail)
		sum_collected->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
	sum_collected->sum_list_tail = (union jffs2_sum_mem *) item;

	switch (je16_to_cpu(item->u.nodetype)) {
		case JFFS2_NODETYPE_INODE:
			sum_collected->sum_size += JFFS2_SUMMARY_INODE_SIZE;
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_DIRENT:
			sum_collected->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_XATTR:
			sum_collected->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_XREF:
			sum_collected->sum_size += JFFS2_SUMMARY_XREF_SIZE;
			sum_collected->sum_num++;
			break;

		default:
			error_msg_and_die("__jffs2_add_sum_mem(): UNKNOWN node type %d\n", je16_to_cpu(item->u.nodetype));
	}
	return 0;
}

void add_sum_inode_mem(union jffs2_node_union *node)
{
	struct jffs2_sum_inode_mem *temp = (struct jffs2_sum_inode_mem *) malloc(sizeof(struct jffs2_sum_inode_mem));

	if (!temp)
		error_msg_and_die("Can't allocate memory for summary information!\n");

	temp->nodetype = node->i.nodetype;
	temp->inode = node->i.ino;
	temp->version = node->i.version;
	temp->offset = cpu_to_je32(data_ofs);
	temp->totlen = node->i.totlen;
	temp->next = NULL;

	add_sum_mem((union jffs2_sum_mem *) temp);
}

void add_sum_dirent_mem(union jffs2_node_union *node)
{
	struct jffs2_sum_dirent_mem *temp = (struct jffs2_sum_dirent_mem *)
		malloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize);

	if (!temp)
		error_msg_and_die("Can't allocate memory for summary information!\n");

	temp->nodetype = node->d.nodetype;
	temp->totlen = node->d.totlen;
	temp->offset = cpu_to_je32(data_ofs);
	temp->pino = node->d.pino;
	temp->version = node->d.version;
	temp->ino = node->d.ino;
	temp->nsize = node->d.nsize;
	temp->type = node->d.type;
	temp->next = NULL;

	memcpy(temp->name,node->d.name,node->d.nsize);
	add_sum_mem((union jffs2_sum_mem *) temp);
}

void add_sum_xattr_mem(union jffs2_node_union *node)
{
	struct jffs2_sum_xattr_mem *temp = (struct jffs2_sum_xattr_mem *)
		malloc(sizeof(struct jffs2_sum_xattr_mem));
	if (!temp)
		error_msg_and_die("Can't allocate memory for summary information!\n");

	temp->nodetype = node->x.nodetype;
	temp->xid = node->x.xid;
	temp->version = node->x.version;
	temp->offset = cpu_to_je32(data_ofs);
	temp->totlen = node->x.totlen;
	temp->next = NULL;

	add_sum_mem((union jffs2_sum_mem *) temp);
}

void add_sum_xref_mem(union jffs2_node_union *node)
{
	struct jffs2_sum_xref_mem *temp = (struct jffs2_sum_xref_mem *)
		malloc(sizeof(struct jffs2_sum_xref_mem));
	if (!temp)
		error_msg_and_die("Can't allocate memory for summary information!\n");

	temp->nodetype = node->r.nodetype;
	temp->offset = cpu_to_je32(data_ofs);
	temp->next = NULL;

	add_sum_mem((union jffs2_sum_mem *) temp);
}

void write_dirent_to_buff(union jffs2_node_union *node)
{
	pad_block_if_less_than(je32_to_cpu (node->d.totlen),JFFS2_SUMMARY_DIRENT_SIZE(node->d.nsize));
	add_sum_dirent_mem(node);
	full_write(data_buffer + data_ofs, &(node->d), je32_to_cpu (node->d.totlen));
	padword();
}


void write_inode_to_buff(union jffs2_node_union *node)
{
	pad_block_if_less_than(je32_to_cpu (node->i.totlen),JFFS2_SUMMARY_INODE_SIZE);
	add_sum_inode_mem(node);	/* Add inode summary mem to summary list */
	full_write(data_buffer + data_ofs, &(node->i), je32_to_cpu (node->i.totlen));	/* Write out the inode to inode_buffer */
	padword();
}

void write_xattr_to_buff(union jffs2_node_union *node)
{
	pad_block_if_less_than(je32_to_cpu(node->x.totlen), JFFS2_SUMMARY_XATTR_SIZE);
	add_sum_xattr_mem(node);	/* Add xdatum summary mem to summary list */
	full_write(data_buffer + data_ofs, &(node->x), je32_to_cpu(node->x.totlen));
	padword();
}

void write_xref_to_buff(union jffs2_node_union *node)
{
	pad_block_if_less_than(je32_to_cpu(node->r.totlen), JFFS2_SUMMARY_XREF_SIZE);
	add_sum_xref_mem(node);		/* Add xref summary mem to summary list */
	full_write(data_buffer + data_ofs, &(node->r), je32_to_cpu(node->r.totlen));
	padword();
}

void create_summed_image(int inp_size)
{
	uint8_t *p = file_buffer;
	union jffs2_node_union *node;
	uint32_t crc, length;
	uint16_t type;
	int bitchbitmask = 0;
	int obsolete;
	char name[256];

	while ( p < (file_buffer + inp_size)) {

		node = (union jffs2_node_union *) p;

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

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

		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 - file_buffer, je32_to_cpu (node->u.hdr_crc), crc);
			p += 4;
			continue;
		}

		switch(je16_to_cpu(node->u.nodetype)) {
			case JFFS2_NODETYPE_INODE:
				if (verbose)
					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 - file_buffer, 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 - file_buffer, je32_to_cpu (node->i.node_crc), crc);
					p += 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 - file_buffer, je32_to_cpu (node->i.data_crc), crc);
					p += PAD(je32_to_cpu (node->i.totlen));
					continue;
				}

				write_inode_to_buff(node);

				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;

				if (verbose)
					printf ("%8s Dirent     node at 0x%08zx, totlen 0x%08x, #pino %5d, version %5d, #ino  %8d, nsize %8d, name %s\n",
							obsolete ? "Obsolete" : "",
							p - file_buffer, 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 - file_buffer, je32_to_cpu (node->d.node_crc), crc);
					p += 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 - file_buffer, je32_to_cpu (node->d.name_crc), crc);
					p += PAD(je32_to_cpu (node->d.totlen));
					continue;
				}

				write_dirent_to_buff(node);

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

			case JFFS2_NODETYPE_XATTR:
				if (je32_to_cpu(node->x.node_crc) == 0xffffffff)
					obsolete = 1;
				if (verbose)
					printf("%8s Xdatum     node at 0x%08zx, totlen 0x%08x, "
							"#xid  %5u, version %5u\n",
							obsolete ? "Obsolete" : "",
							p - file_buffer, je32_to_cpu (node->x.totlen),
							je32_to_cpu(node->x.xid), je32_to_cpu(node->x.version));
				crc = mtd_crc32(0, node, sizeof (struct jffs2_raw_xattr) - 4);
				if (crc != je32_to_cpu(node->x.node_crc)) {
					printf("Wrong node_crc at 0x%08zx, 0x%08x instead of 0x%08x\n",
							p - file_buffer, je32_to_cpu(node->x.node_crc), crc);
					p += PAD(je32_to_cpu (node->x.totlen));
					continue;
				}
				length = node->x.name_len + 1 + je16_to_cpu(node->x.value_len);
				crc = mtd_crc32(0, node->x.data, length);
				if (crc != je32_to_cpu(node->x.data_crc)) {
					printf("Wrong data_crc at 0x%08zx, 0x%08x instead of 0x%08x\n",
							p - file_buffer, je32_to_cpu(node->x.data_crc), crc);
					p += PAD(je32_to_cpu (node->x.totlen));
					continue;
				}

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

			case JFFS2_NODETYPE_XREF:
				if (je32_to_cpu(node->r.node_crc) == 0xffffffff)
					obsolete = 1;
				if (verbose)
					printf("%8s Xref       node at 0x%08zx, totlen 0x%08x, "
							"#ino  %5u, xid     %5u\n",
							obsolete ? "Obsolete" : "",
							p - file_buffer, je32_to_cpu(node->r.totlen),
							je32_to_cpu(node->r.ino), je32_to_cpu(node->r.xid));
				crc = mtd_crc32(0, node, sizeof (struct jffs2_raw_xref) - 4);
				if (crc != je32_to_cpu(node->r.node_crc)) {
					printf("Wrong node_crc at 0x%08zx, 0x%08x instead of 0x%08x\n",
							p - file_buffer, je32_to_cpu(node->r.node_crc), crc);
					p += PAD(je32_to_cpu (node->r.totlen));
					continue;
				}

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

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

				if (!found_cleanmarkers) {
					found_cleanmarkers = 1;

					if (add_cleanmarkers == 1 && use_input_cleanmarker_size == 1){
						cleanmarker_size = je32_to_cpu (node->u.totlen);
						setup_cleanmarker();
					}
				}

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

			case 0xffff:
				p += 4;
				break;

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

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

int main(int argc, char **argv)
{
	int ret;

	process_options(argc,argv);

	if ((in_fd == -1) || (out_fd == -1)) {
		if(in_fd != -1)
			close(in_fd);
		if(out_fd != -1)
			close(out_fd);
		fprintf(stderr, "%s", helptext);
		error_msg_and_die("You must specify input and output files!\n");
	}

	init_buffers();
	init_sumlist();

	while ((ret = load_next_block())) {
		create_summed_image(ret);
	}

	flush_buffers();
	clean_buffers();
	clean_sumlist();

	if (in_fd != -1)
		close(in_fd);
	if (out_fd != -1)
		close(out_fd);

	return 0;
}