fs/yaffs2/yaffs_uboot_glue.c - filogic/uboot - Gitiles

 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
  * Copyright (C) 2002-2007 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
  *
  * 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.
  */

 /*
  * yaffscfg.c  The configuration for the "direct" use of yaffs.
  *
  * This is set up for u-boot.
  *
  * This version now uses the ydevconfig mechanism to set up partitions.
  */

 #include <div64.h>
 #include <malloc.h>
 #include <linux/printk.h>

 #include <config.h>
 #include "nand.h"
 #include "yaffscfg.h"
 #include "yaffsfs.h"
 #include "yaffs_packedtags2.h"
 #include "yaffs_mtdif.h"
 #include "yaffs_mtdif2.h"
 #if 0
 #include <errno.h>
 #else
 #include "malloc.h"
 #endif
 #include <linux/mtd/rawnand.h>

 unsigned yaffs_trace_mask = 0x0; /* Disable logging */
 static int yaffs_errno;

 void yaffs_bug_fn(const char *fn, int n)
 {
 	printf("yaffs bug at %s:%d\n", fn, n);
 }

 void *yaffsfs_malloc(size_t x)
 {
 	return malloc(x);
 }

 void yaffsfs_free(void *x)
 {
 	free(x);
 }

 void yaffsfs_SetError(int err)
 {
 	yaffs_errno = err;
 }

 int yaffsfs_GetLastError(void)
 {
 	return yaffs_errno;
 }

 int yaffsfs_GetError(void)
 {
 	return yaffs_errno;
 }

 void yaffsfs_Lock(void)
 {
 }

 void yaffsfs_Unlock(void)
 {
 }

 __u32 yaffsfs_CurrentTime(void)
 {
 	return 0;
 }

 void *yaffs_malloc(size_t size)
 {
 	return malloc(size);
 }

 void yaffs_free(void *ptr)
 {
 	free(ptr);
 }

 void yaffsfs_LocalInitialisation(void)
 {
 	/* No locking used */
 }

 static const char *yaffs_file_type_str(struct yaffs_stat *stat)
 {
 	switch (stat->st_mode & S_IFMT) {
 	case S_IFREG: return "regular file";
 	case S_IFDIR: return "directory";
 	case S_IFLNK: return "symlink";
 	default: return "unknown";
 	}
 }

 static const char *yaffs_error_str(void)
 {
 	int error = yaffsfs_GetLastError();

 	if (error < 0)
 		error = -error;

 	switch (error) {
 	case EBUSY: return "Busy";
 	case ENODEV: return "No such device";
 	case EINVAL: return "Invalid parameter";
 	case ENFILE: return "Too many open files";
 	case EBADF:  return "Bad handle";
 	case EACCES: return "Wrong permissions";
 	case EXDEV:  return "Not on same device";
 	case ENOENT: return "No such entry";
 	case ENOSPC: return "Device full";
 	case EROFS:  return "Read only file system";
 	case ERANGE: return "Range error";
 	case ENOTEMPTY: return "Not empty";
 	case ENAMETOOLONG: return "Name too long";
 	case ENOMEM: return "Out of memory";
 	case EFAULT: return "Fault";
 	case EEXIST: return "Name exists";
 	case ENOTDIR: return "Not a directory";
 	case EISDIR: return "Not permitted on a directory";
 	case ELOOP:  return "Symlink loop";
 	case 0: return "No error";
 	default: return "Unknown error";
 	}
 }

 void cmd_yaffs_tracemask(unsigned set, unsigned mask)
 {
 	if (set)
 		yaffs_trace_mask = mask;

 	printf("yaffs trace mask: %08x\n", yaffs_trace_mask);
 }

 static int yaffs_regions_overlap(int a, int b, int x, int y)
 {
 	return	(a <= x && x <= b) ||
 		(a <= y && y <= b) ||
 		(x <= a && a <= y) ||
 		(x <= b && b <= y);
 }

 void cmd_yaffs_devconfig(char *_mp, int flash_dev,
 			int start_block, int end_block)
 {
 	struct mtd_info *mtd = NULL;
 	struct yaffs_dev *dev = NULL;
 	struct yaffs_dev *chk;
 	char *mp = NULL;
 	struct nand_chip *chip;

 	mtd = get_nand_dev_by_index(flash_dev);
 	if (!mtd) {
 		pr_err("\nno NAND devices available\n");
 		return;
 	}

 	dev = calloc(1, sizeof(*dev));
 	mp = strdup(_mp);

 	if (!dev || !mp) {
 		/* Alloc error */
 		printf("Failed to allocate memory\n");
 		goto err;
 	}

 	if (flash_dev >= CONFIG_SYS_MAX_NAND_DEVICE) {
 		printf("Flash device invalid\n");
 		goto err;
 	}

 	if (end_block == 0)
 		end_block = lldiv(mtd->size, mtd->erasesize - 1);

 	if (end_block < start_block) {
 		printf("Bad start/end\n");
 		goto err;
 	}

 	chip =  mtd_to_nand(mtd);

 	/* Check for any conflicts */
 	yaffs_dev_rewind();
 	while (1) {
 		chk = yaffs_next_dev();
 		if (!chk)
 			break;
 		if (strcmp(chk->param.name, mp) == 0) {
 			printf("Mount point name already used\n");
 			goto err;
 		}
 		if (chk->driver_context == mtd &&
 			yaffs_regions_overlap(
 				chk->param.start_block, chk->param.end_block,
 				start_block, end_block)) {
 			printf("Region overlaps with partition %s\n",
 				chk->param.name);
 			goto err;
 		}

 	}

 	/* Seems sane, so configure */
 	memset(dev, 0, sizeof(*dev));
 	dev->param.name = mp;
 	dev->driver_context = mtd;
 	dev->param.start_block = start_block;
 	dev->param.end_block = end_block;
 	dev->param.chunks_per_block = mtd->erasesize / mtd->writesize;
 	dev->param.total_bytes_per_chunk = mtd->writesize;
 	dev->param.is_yaffs2 = 1;
 	dev->param.use_nand_ecc = 1;
 	dev->param.n_reserved_blocks = 5;
 	if (chip->ecc.layout->oobavail < sizeof(struct yaffs_packed_tags2))
 		dev->param.inband_tags = 1;
 	dev->param.n_caches = 10;
 	dev->param.write_chunk_tags_fn = nandmtd2_write_chunk_tags;
 	dev->param.read_chunk_tags_fn = nandmtd2_read_chunk_tags;
 	dev->param.erase_fn = nandmtd_EraseBlockInNAND;
 	dev->param.initialise_flash_fn = nandmtd_InitialiseNAND;
 	dev->param.bad_block_fn = nandmtd2_MarkNANDBlockBad;
 	dev->param.query_block_fn = nandmtd2_QueryNANDBlock;

 	yaffs_add_device(dev);

 	printf("Configures yaffs mount %s: dev %d start block %d, end block %d %s\n",
 		mp, flash_dev, start_block, end_block,
 		dev->param.inband_tags ? "using inband tags" : "");
 	return;

 err:
 	free(dev);
 	free(mp);
 }

 void cmd_yaffs_dev_ls(void)
 {
 	struct yaffs_dev *dev;
 	int flash_dev;
 	int free_space;

 	yaffs_dev_rewind();

 	while (1) {
 		dev = yaffs_next_dev();
 		if (!dev)
 			return;
 		flash_dev = nand_mtd_to_devnum(dev->driver_context);
 		printf("%-10s %5d 0x%05x 0x%05x %s",
 			dev->param.name, flash_dev,
 			dev->param.start_block, dev->param.end_block,
 			dev->param.inband_tags ? "using inband tags, " : "");

 		free_space = yaffs_freespace(dev->param.name);
 		if (free_space < 0)
 			printf("not mounted\n");
 		else
 			printf("free 0x%x\n", free_space);

 	}
 }

 void make_a_file(char *yaffsName, char bval, int sizeOfFile)
 {
 	int outh;
 	int i;
 	unsigned char buffer[100];

 	outh = yaffs_open(yaffsName,
 				O_CREAT | O_RDWR | O_TRUNC,
 				S_IREAD | S_IWRITE);
 	if (outh < 0) {
 		printf("Error opening file: %d. %s\n", outh, yaffs_error_str());
 		return;
 	}

 	memset(buffer, bval, 100);

 	do {
 		i = sizeOfFile;
 		if (i > 100)
 			i = 100;
 		sizeOfFile -= i;

 		yaffs_write(outh, buffer, i);

 	} while (sizeOfFile > 0);

 	yaffs_close(outh);
 }

 void read_a_file(char *fn)
 {
 	int h;
 	int i = 0;
 	unsigned char b;

 	h = yaffs_open(fn, O_RDWR, 0);
 	if (h < 0) {
 		printf("File not found\n");
 		return;
 	}

 	while (yaffs_read(h, &b, 1) > 0) {
 		printf("%02x ", b);
 		i++;
 		if (i > 32) {
 			printf("\n");
 			i = 0;
 		}
 	}
 	printf("\n");
 	yaffs_close(h);
 }

 void cmd_yaffs_mount(char *mp)
 {
 	int retval = yaffs_mount(mp);
 	if (retval < 0)
 		printf("Error mounting %s, return value: %d, %s\n", mp,
 			yaffsfs_GetError(), yaffs_error_str());
 }

 void cmd_yaffs_umount(char *mp)
 {
 	if (yaffs_unmount(mp) == -1)
 		printf("Error umounting %s, return value: %d, %s\n", mp,
 			yaffsfs_GetError(), yaffs_error_str());
 }

 void cmd_yaffs_write_file(char *yaffsName, char bval, int sizeOfFile)
 {
 	make_a_file(yaffsName, bval, sizeOfFile);
 }

 void cmd_yaffs_read_file(char *fn)
 {
 	read_a_file(fn);
 }

 void cmd_yaffs_mread_file(char *fn, char *addr)
 {
 	int h;
 	struct yaffs_stat s;

 	yaffs_stat(fn, &s);

 	printf("Copy %s to 0x%p... ", fn, addr);
 	h = yaffs_open(fn, O_RDWR, 0);
 	if (h < 0) {
 		printf("File not found\n");
 		return;
 	}

 	yaffs_read(h, addr, (int)s.st_size);
 	printf("\t[DONE]\n");

 	yaffs_close(h);
 }

 void cmd_yaffs_mwrite_file(char *fn, char *addr, int size)
 {
 	int outh;

 	outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
 	if (outh < 0)
 		printf("Error opening file: %d, %s\n", outh, yaffs_error_str());

 	yaffs_write(outh, addr, size);

 	yaffs_close(outh);
 }

 void cmd_yaffs_ls(const char *mountpt, int longlist)
 {
 	int i;
 	yaffs_DIR *d;
 	struct yaffs_dirent *de;
 	struct yaffs_stat stat;
 	char tempstr[255];

 	d = yaffs_opendir(mountpt);

 	if (!d) {
 		printf("opendir failed, %s\n", yaffs_error_str());
 		return;
 	}

 	for (i = 0; (de = yaffs_readdir(d)) != NULL; i++) {
 		if (longlist) {
 			sprintf(tempstr, "%s/%s", mountpt, de->d_name);
 			yaffs_lstat(tempstr, &stat);
 			printf("%-25s\t%7ld",
 					de->d_name,
 					(long)stat.st_size);
 			printf(" %5d %s\n",
 					stat.st_ino,
 					yaffs_file_type_str(&stat));
 		} else {
 			printf("%s\n", de->d_name);
 		}
 	}

 	yaffs_closedir(d);
 }

 void cmd_yaffs_mkdir(const char *dir)
 {
 	int retval = yaffs_mkdir(dir, 0);

 	if (retval < 0)
 		printf("yaffs_mkdir returning error: %d, %s\n",
 			retval, yaffs_error_str());
 }

 void cmd_yaffs_rmdir(const char *dir)
 {
 	int retval = yaffs_rmdir(dir);

 	if (retval < 0)
 		printf("yaffs_rmdir returning error: %d, %s\n",
 			retval, yaffs_error_str());
 }

 void cmd_yaffs_rm(const char *path)
 {
 	int retval = yaffs_unlink(path);

 	if (retval < 0)
 		printf("yaffs_unlink returning error: %d, %s\n",
 			retval, yaffs_error_str());
 }

 void cmd_yaffs_mv(const char *oldPath, const char *newPath)
 {
 	int retval = yaffs_rename(newPath, oldPath);

 	if (retval < 0)
 		printf("yaffs_unlink returning error: %d, %s\n",
 			retval, yaffs_error_str());
 }
	/*
	* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
	*
	* Copyright (C) 2002-2007 Aleph One Ltd.
	* for Toby Churchill Ltd and Brightstar Engineering
	*
	* Created by Charles Manning <charles@aleph1.co.uk>
	*
	* 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.
	*/

	/*
	* yaffscfg.c The configuration for the "direct" use of yaffs.
	*
	* This is set up for u-boot.
	*
	* This version now uses the ydevconfig mechanism to set up partitions.
	*/

	#include <div64.h>
	#include <malloc.h>
	#include <linux/printk.h>

	#include <config.h>
	#include "nand.h"
	#include "yaffscfg.h"
	#include "yaffsfs.h"
	#include "yaffs_packedtags2.h"
	#include "yaffs_mtdif.h"
	#include "yaffs_mtdif2.h"
	#if 0
	#include <errno.h>
	#else
	#include "malloc.h"
	#endif
	#include <linux/mtd/rawnand.h>

	unsigned yaffs_trace_mask = 0x0; /* Disable logging */
	static int yaffs_errno;

	void yaffs_bug_fn(const char *fn, int n)
	{
	printf("yaffs bug at %s:%d\n", fn, n);
	}

	void *yaffsfs_malloc(size_t x)
	{
	return malloc(x);
	}

	void yaffsfs_free(void *x)
	{
	free(x);
	}

	void yaffsfs_SetError(int err)
	{
	yaffs_errno = err;
	}

	int yaffsfs_GetLastError(void)
	{
	return yaffs_errno;
	}

	int yaffsfs_GetError(void)
	{
	return yaffs_errno;
	}

	void yaffsfs_Lock(void)
	{
	}

	void yaffsfs_Unlock(void)
	{
	}

	__u32 yaffsfs_CurrentTime(void)
	{
	return 0;
	}

	void *yaffs_malloc(size_t size)
	{
	return malloc(size);
	}

	void yaffs_free(void *ptr)
	{
	free(ptr);
	}

	void yaffsfs_LocalInitialisation(void)
	{
	/* No locking used */
	}

	static const char yaffs_file_type_str(struct yaffs_stat stat)
	{
	switch (stat->st_mode & S_IFMT) {
	case S_IFREG: return "regular file";
	case S_IFDIR: return "directory";
	case S_IFLNK: return "symlink";
	default: return "unknown";
	}
	}

	static const char *yaffs_error_str(void)
	{
	int error = yaffsfs_GetLastError();

	if (error < 0)
	error = -error;

	switch (error) {
	case EBUSY: return "Busy";
	case ENODEV: return "No such device";
	case EINVAL: return "Invalid parameter";
	case ENFILE: return "Too many open files";
	case EBADF: return "Bad handle";
	case EACCES: return "Wrong permissions";
	case EXDEV: return "Not on same device";
	case ENOENT: return "No such entry";
	case ENOSPC: return "Device full";
	case EROFS: return "Read only file system";
	case ERANGE: return "Range error";
	case ENOTEMPTY: return "Not empty";
	case ENAMETOOLONG: return "Name too long";
	case ENOMEM: return "Out of memory";
	case EFAULT: return "Fault";
	case EEXIST: return "Name exists";
	case ENOTDIR: return "Not a directory";
	case EISDIR: return "Not permitted on a directory";
	case ELOOP: return "Symlink loop";
	case 0: return "No error";
	default: return "Unknown error";
	}
	}

	void cmd_yaffs_tracemask(unsigned set, unsigned mask)
	{
	if (set)
	yaffs_trace_mask = mask;

	printf("yaffs trace mask: %08x\n", yaffs_trace_mask);
	}

	static int yaffs_regions_overlap(int a, int b, int x, int y)
	{
	return (a <= x && x <= b) \|\|
	(a <= y && y <= b) \|\|
	(x <= a && a <= y) \|\|
	(x <= b && b <= y);
	}

	void cmd_yaffs_devconfig(char *_mp, int flash_dev,
	int start_block, int end_block)
	{
	struct mtd_info *mtd = NULL;
	struct yaffs_dev *dev = NULL;
	struct yaffs_dev *chk;
	char *mp = NULL;
	struct nand_chip *chip;

	mtd = get_nand_dev_by_index(flash_dev);
	if (!mtd) {
	pr_err("\nno NAND devices available\n");
	return;
	}

	dev = calloc(1, sizeof(*dev));
	mp = strdup(_mp);

	if (!dev \|\| !mp) {
	/* Alloc error */
	printf("Failed to allocate memory\n");
	goto err;
	}

	if (flash_dev >= CONFIG_SYS_MAX_NAND_DEVICE) {
	printf("Flash device invalid\n");
	goto err;
	}

	if (end_block == 0)
	end_block = lldiv(mtd->size, mtd->erasesize - 1);

	if (end_block < start_block) {
	printf("Bad start/end\n");
	goto err;
	}

	chip = mtd_to_nand(mtd);

	/* Check for any conflicts */
	yaffs_dev_rewind();
	while (1) {
	chk = yaffs_next_dev();
	if (!chk)
	break;
	if (strcmp(chk->param.name, mp) == 0) {
	printf("Mount point name already used\n");
	goto err;
	}
	if (chk->driver_context == mtd &&
	yaffs_regions_overlap(
	chk->param.start_block, chk->param.end_block,
	start_block, end_block)) {
	printf("Region overlaps with partition %s\n",
	chk->param.name);
	goto err;
	}

	}

	/* Seems sane, so configure */
	memset(dev, 0, sizeof(*dev));
	dev->param.name = mp;
	dev->driver_context = mtd;
	dev->param.start_block = start_block;
	dev->param.end_block = end_block;
	dev->param.chunks_per_block = mtd->erasesize / mtd->writesize;
	dev->param.total_bytes_per_chunk = mtd->writesize;
	dev->param.is_yaffs2 = 1;
	dev->param.use_nand_ecc = 1;
	dev->param.n_reserved_blocks = 5;
	if (chip->ecc.layout->oobavail < sizeof(struct yaffs_packed_tags2))
	dev->param.inband_tags = 1;
	dev->param.n_caches = 10;
	dev->param.write_chunk_tags_fn = nandmtd2_write_chunk_tags;
	dev->param.read_chunk_tags_fn = nandmtd2_read_chunk_tags;
	dev->param.erase_fn = nandmtd_EraseBlockInNAND;
	dev->param.initialise_flash_fn = nandmtd_InitialiseNAND;
	dev->param.bad_block_fn = nandmtd2_MarkNANDBlockBad;
	dev->param.query_block_fn = nandmtd2_QueryNANDBlock;

	yaffs_add_device(dev);

	printf("Configures yaffs mount %s: dev %d start block %d, end block %d %s\n",
	mp, flash_dev, start_block, end_block,
	dev->param.inband_tags ? "using inband tags" : "");
	return;

	err:
	free(dev);
	free(mp);
	}

	void cmd_yaffs_dev_ls(void)
	{
	struct yaffs_dev *dev;
	int flash_dev;
	int free_space;

	yaffs_dev_rewind();

	while (1) {
	dev = yaffs_next_dev();
	if (!dev)
	return;
	flash_dev = nand_mtd_to_devnum(dev->driver_context);
	printf("%-10s %5d 0x%05x 0x%05x %s",
	dev->param.name, flash_dev,
	dev->param.start_block, dev->param.end_block,
	dev->param.inband_tags ? "using inband tags, " : "");

	free_space = yaffs_freespace(dev->param.name);
	if (free_space < 0)
	printf("not mounted\n");
	else
	printf("free 0x%x\n", free_space);

	}
	}

	void make_a_file(char *yaffsName, char bval, int sizeOfFile)
	{
	int outh;
	int i;
	unsigned char buffer[100];

	outh = yaffs_open(yaffsName,
	O_CREAT \| O_RDWR \| O_TRUNC,
	S_IREAD \| S_IWRITE);
	if (outh < 0) {
	printf("Error opening file: %d. %s\n", outh, yaffs_error_str());
	return;
	}

	memset(buffer, bval, 100);

	do {
	i = sizeOfFile;
	if (i > 100)
	i = 100;
	sizeOfFile -= i;

	yaffs_write(outh, buffer, i);

	} while (sizeOfFile > 0);

	yaffs_close(outh);
	}

	void read_a_file(char *fn)
	{
	int h;
	int i = 0;
	unsigned char b;

	h = yaffs_open(fn, O_RDWR, 0);
	if (h < 0) {
	printf("File not found\n");
	return;
	}

	while (yaffs_read(h, &b, 1) > 0) {
	printf("%02x ", b);
	i++;
	if (i > 32) {
	printf("\n");
	i = 0;
	}
	}
	printf("\n");
	yaffs_close(h);
	}

	void cmd_yaffs_mount(char *mp)
	{
	int retval = yaffs_mount(mp);
	if (retval < 0)
	printf("Error mounting %s, return value: %d, %s\n", mp,
	yaffsfs_GetError(), yaffs_error_str());
	}

	void cmd_yaffs_umount(char *mp)
	{
	if (yaffs_unmount(mp) == -1)
	printf("Error umounting %s, return value: %d, %s\n", mp,
	yaffsfs_GetError(), yaffs_error_str());
	}

	void cmd_yaffs_write_file(char *yaffsName, char bval, int sizeOfFile)
	{
	make_a_file(yaffsName, bval, sizeOfFile);
	}

	void cmd_yaffs_read_file(char *fn)
	{
	read_a_file(fn);
	}

	void cmd_yaffs_mread_file(char fn, char addr)
	{
	int h;
	struct yaffs_stat s;

	yaffs_stat(fn, &s);

	printf("Copy %s to 0x%p... ", fn, addr);
	h = yaffs_open(fn, O_RDWR, 0);
	if (h < 0) {
	printf("File not found\n");
	return;
	}

	yaffs_read(h, addr, (int)s.st_size);
	printf("\t[DONE]\n");

	yaffs_close(h);
	}

	void cmd_yaffs_mwrite_file(char fn, char addr, int size)
	{
	int outh;

	outh = yaffs_open(fn, O_CREAT \| O_RDWR \| O_TRUNC, S_IREAD \| S_IWRITE);
	if (outh < 0)
	printf("Error opening file: %d, %s\n", outh, yaffs_error_str());

	yaffs_write(outh, addr, size);

	yaffs_close(outh);
	}

	void cmd_yaffs_ls(const char *mountpt, int longlist)
	{
	int i;
	yaffs_DIR *d;
	struct yaffs_dirent *de;
	struct yaffs_stat stat;
	char tempstr[255];

	d = yaffs_opendir(mountpt);

	if (!d) {
	printf("opendir failed, %s\n", yaffs_error_str());
	return;
	}

	for (i = 0; (de = yaffs_readdir(d)) != NULL; i++) {
	if (longlist) {
	sprintf(tempstr, "%s/%s", mountpt, de->d_name);
	yaffs_lstat(tempstr, &stat);
	printf("%-25s\t%7ld",
	de->d_name,
	(long)stat.st_size);
	printf(" %5d %s\n",
	stat.st_ino,
	yaffs_file_type_str(&stat));
	} else {
	printf("%s\n", de->d_name);
	}
	}

	yaffs_closedir(d);
	}

	void cmd_yaffs_mkdir(const char *dir)
	{
	int retval = yaffs_mkdir(dir, 0);

	if (retval < 0)
	printf("yaffs_mkdir returning error: %d, %s\n",
	retval, yaffs_error_str());
	}

	void cmd_yaffs_rmdir(const char *dir)
	{
	int retval = yaffs_rmdir(dir);

	if (retval < 0)
	printf("yaffs_rmdir returning error: %d, %s\n",
	retval, yaffs_error_str());
	}

	void cmd_yaffs_rm(const char *path)
	{
	int retval = yaffs_unlink(path);

	if (retval < 0)
	printf("yaffs_unlink returning error: %d, %s\n",
	retval, yaffs_error_str());
	}

	void cmd_yaffs_mv(const char oldPath, const char newPath)
	{
	int retval = yaffs_rename(newPath, oldPath);

	if (retval < 0)
	printf("yaffs_unlink returning error: %d, %s\n",
	retval, yaffs_error_str());
	}