Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 3217 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c b/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c
new file mode 100644
index 000000000..334598eed
--- /dev/null
+++ b/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c
@@ -0,0 +1,3217 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2011 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.
+ */
+
+#include <div64.h>
+#include "yaffsfs.h"
+#include "yaffs_guts.h"
+#include "yaffscfg.h"
+#include "yportenv.h"
+#include "yaffs_trace.h"
+
+#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+/* YAFFSFS_RW_SIZE must be a power of 2 */
+#define YAFFSFS_RW_SHIFT (13)
+#define YAFFSFS_RW_SIZE  (1<<YAFFSFS_RW_SHIFT)
+
+/* Some forward references */
+static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
+					    const YCHAR *path,
+					    int symDepth, int getEquiv,
+					    struct yaffs_obj **dirOut,
+					    int *notDir, int *loop);
+
+static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
+
+unsigned int yaffs_wr_attempts;
+
+/*
+ * Handle management.
+ * There are open inodes in struct yaffsfs_Inode.
+ * There are open file descriptors in yaffsfs_FileDes.
+ * There are open handles in yaffsfs_FileDes.
+ *
+ * Things are structured this way to be like the Linux VFS model
+ * so that interactions with the yaffs guts calls are similar.
+ * That means more common code paths and less special code.
+ * That means better testing etc.
+ *
+ * We have 3 layers because:
+ * A handle is different than an fd because you can use dup()
+ * to create a new handle that accesses the *same* fd. The two
+ * handles will use the same offset (part of the fd). We only close
+ * down the fd when there are no more handles accessing it.
+ *
+ * More than one fd can currently access one file, but each fd
+ * has its own permsiions and offset.
+ */
+
+struct yaffsfs_Inode {
+	int count;		/* Number of handles accessing this inode */
+	struct yaffs_obj *iObj;
+};
+
+struct yaffsfs_FileDes {
+	u8 reading:1;
+	u8 writing:1;
+	u8 append:1;
+	u8 shareRead:1;
+	u8 shareWrite:1;
+	int inodeId:12;		/* Index to corresponding yaffsfs_Inode */
+	int handleCount:10;	/* Number of handles for this fd */
+	loff_t position;	/* current position in file */
+};
+
+struct yaffsfs_Handle {
+	short int fdId;
+	short int useCount;
+};
+
+
+struct yaffsfs_DirSearchContxt {
+	struct yaffs_dirent de;	/* directory entry */
+	YCHAR name[NAME_MAX + 1];	/* name of directory being searched */
+	struct yaffs_obj *dirObj;	/* ptr to directory being searched */
+	struct yaffs_obj *nextReturn;	/* obj  returned by next readddir */
+	struct list_head others;
+	int offset:20;
+	unsigned inUse:1;
+};
+
+static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC];
+static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
+static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
+static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
+
+static int yaffsfs_handlesInitialised;
+
+unsigned yaffs_set_trace(unsigned tm)
+{
+	yaffs_trace_mask = tm;
+	return yaffs_trace_mask;
+}
+
+unsigned yaffs_get_trace(void)
+{
+	return yaffs_trace_mask;
+}
+
+/*
+ * yaffsfs_InitHandle
+ * Inilitalise handle management on start-up.
+ */
+
+static void yaffsfs_InitHandles(void)
+{
+	int i;
+	if (yaffsfs_handlesInitialised)
+		return;
+
+	memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode));
+	memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd));
+	memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle));
+	memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc));
+
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++)
+		yaffsfs_fd[i].inodeId = -1;
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++)
+		yaffsfs_handle[i].fdId = -1;
+}
+
+static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
+{
+	if (h >= 0 && h < YAFFSFS_N_HANDLES)
+		return &yaffsfs_handle[h];
+	return NULL;
+}
+
+static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
+{
+	struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
+
+	if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
+		return &yaffsfs_fd[h->fdId];
+
+	return NULL;
+}
+
+static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
+{
+	struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
+
+	if (fd && fd->handleCount > 0 &&
+	    fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
+		return &yaffsfs_inode[fd->inodeId];
+
+	return NULL;
+}
+
+static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
+{
+	struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
+
+	if (in)
+		return in->iObj;
+
+	return NULL;
+}
+
+/*
+ * yaffsfs_FindInodeIdForObject
+ * Find the inode entry for an object, if it exists.
+ */
+
+static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
+{
+	int i;
+	int ret = -1;
+
+	if (obj)
+		obj = yaffs_get_equivalent_obj(obj);
+
+	/* Look for it in open inode table */
+	for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
+		if (yaffsfs_inode[i].iObj == obj)
+			ret = i;
+	}
+	return ret;
+}
+
+/*
+ * yaffsfs_GetInodeIdForObject
+ * Grab an inode entry when opening a new inode.
+ */
+static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
+{
+	int i;
+	int ret;
+	struct yaffsfs_Inode *in = NULL;
+
+	if (obj)
+		obj = yaffs_get_equivalent_obj(obj);
+
+	ret = yaffsfs_FindInodeIdForObject(obj);
+
+	for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
+		if (!yaffsfs_inode[i].iObj)
+			ret = i;
+	}
+
+	if (ret >= 0) {
+		in = &yaffsfs_inode[ret];
+		if (!in->iObj)
+			in->count = 0;
+		in->iObj = obj;
+		in->count++;
+	}
+
+	return ret;
+}
+
+static int yaffsfs_CountHandles(struct yaffs_obj *obj)
+{
+	int i = yaffsfs_FindInodeIdForObject(obj);
+
+	if (i >= 0)
+		return yaffsfs_inode[i].count;
+	else
+		return 0;
+}
+
+static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in)
+{
+	struct yaffs_obj *obj;
+
+	obj = in->iObj;
+
+	if (obj->unlinked)
+		yaffs_del_obj(obj);
+
+	obj->my_inode = NULL;
+	in->iObj = NULL;
+
+}
+
+static void yaffsfs_PutInode(int inodeId)
+{
+	if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) {
+		struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId];
+		in->count--;
+		if (in->count <= 0) {
+			yaffsfs_ReleaseInode(in);
+			in->count = 0;
+		}
+	}
+}
+
+static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr)
+{
+	int i;
+	struct yaffsfs_Handle *h;
+
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
+		h = &yaffsfs_handle[i];
+		if (h->useCount < 1) {
+			memset(h, 0, sizeof(struct yaffsfs_Handle));
+			h->fdId = -1;
+			h->useCount = 1;
+			if (hptr)
+				*hptr = h;
+			return i;
+		}
+	}
+	return -1;
+}
+
+static int yaffsfs_NewHandleAndFileDes(void)
+{
+	int i;
+	struct yaffsfs_FileDes *fd;
+	struct yaffsfs_Handle *h = NULL;
+	int handle = yaffsfs_NewHandle(&h);
+
+	if (handle < 0)
+		return -1;
+
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
+		fd = &yaffsfs_fd[i];
+		if (fd->handleCount < 1) {
+			memset(fd, 0, sizeof(struct yaffsfs_FileDes));
+			fd->inodeId = -1;
+			fd->handleCount = 1;
+			h->fdId = i;
+			return handle;
+		}
+	}
+
+	/* Dump the handle because we could not get a fd */
+	h->useCount = 0;
+	return -1;
+}
+
+/*
+ * yaffs_get_handle
+ * Increase use of handle when reading/writing a file
+ * Also gets the file descriptor.
+ */
+
+static int yaffsfs_GetHandle(int handle)
+{
+	struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
+
+	if (h && h->useCount > 0) {
+		h->useCount++;
+		return 0;
+	}
+	return -1;
+}
+
+/*
+ * yaffs_put_handle
+ * Let go of a handle when closing a file or aborting an open or
+ * ending a read or write.
+ */
+
+static int yaffsfs_PutFileDes(int fdId)
+{
+	struct yaffsfs_FileDes *fd;
+
+	if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) {
+		fd = &yaffsfs_fd[fdId];
+		fd->handleCount--;
+		if (fd->handleCount < 1) {
+			if (fd->inodeId >= 0) {
+				yaffsfs_PutInode(fd->inodeId);
+				fd->inodeId = -1;
+			}
+		}
+	}
+	return 0;
+}
+
+static int yaffsfs_PutHandle(int handle)
+{
+	struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
+
+	if (h && h->useCount > 0) {
+		h->useCount--;
+		if (h->useCount < 1) {
+			yaffsfs_PutFileDes(h->fdId);
+			h->fdId = -1;
+		}
+	}
+
+	return 0;
+}
+
+static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
+{
+	struct yaffsfs_FileDes *fd;
+	struct yaffsfs_Handle *h;
+	struct yaffs_obj *obj;
+	int i;
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
+		h = yaffsfs_HandleToPointer(i);
+		fd = yaffsfs_HandleToFileDes(i);
+		obj = yaffsfs_HandleToObject(i);
+		if (h && h->useCount > 0) {
+			h->useCount = 0;
+			h->fdId = 0;
+		}
+		if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) {
+			fd->handleCount = 0;
+			yaffsfs_PutInode(fd->inodeId);
+			fd->inodeId = -1;
+		}
+	}
+}
+
+/*
+ *  Stuff to handle names.
+ */
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+
+static int yaffs_toupper(YCHAR a)
+{
+	if (a >= 'a' && a <= 'z')
+		return (a - 'a') + 'A';
+	else
+		return a;
+}
+
+int yaffsfs_Match(YCHAR a, YCHAR b)
+{
+	return (yaffs_toupper(a) == yaffs_toupper(b));
+}
+#else
+int yaffsfs_Match(YCHAR a, YCHAR b)
+{
+	/* case sensitive */
+	return (a == b);
+}
+#endif
+
+int yaffsfs_IsPathDivider(YCHAR ch)
+{
+	const YCHAR *str = YAFFS_PATH_DIVIDERS;
+
+	while (*str) {
+		if (*str == ch)
+			return 1;
+		str++;
+	}
+
+	return 0;
+}
+
+int yaffsfs_CheckNameLength(const char *name)
+{
+	int retVal = 0;
+
+	int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1);
+
+	if (nameLength == 0) {
+		yaffsfs_SetError(-ENOENT);
+		retVal = -1;
+	} else if (nameLength > YAFFS_MAX_NAME_LENGTH) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		retVal = -1;
+	}
+
+	return retVal;
+}
+
+static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
+{
+	YCHAR *alt_path = NULL;
+	int path_length;
+	int i;
+
+	/*
+	 * We don't have a definition for max path length.
+	 * We will use 3 * max name length instead.
+	 */
+	*ret_path = NULL;
+	path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1);
+
+	/* If the last character is a path divider, then we need to
+	 * trim it back so that the name look-up works properly.
+	 * eg. /foo/new_dir/ -> /foo/newdir
+	 * Curveball: Need to handle multiple path dividers:
+	 * eg. /foof/sdfse///// -> /foo/sdfse
+	 */
+	if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) {
+		alt_path = kmalloc(path_length + 1, 0);
+		if (!alt_path)
+			return -1;
+		yaffs_strcpy(alt_path, path);
+		for (i = path_length - 1;
+		     i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--)
+			alt_path[i] = (YCHAR) 0;
+	}
+	*ret_path = alt_path;
+	return 0;
+}
+
+LIST_HEAD(yaffsfs_deviceList);
+
+/*
+ * yaffsfs_FindDevice
+ * yaffsfs_FindRoot
+ * Scan the configuration list to find the device
+ * Curveballs: Should match paths that end in '/' too
+ * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
+ */
+static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
+					    YCHAR **restOfPath)
+{
+	struct list_head *cfg;
+	const YCHAR *leftOver;
+	const YCHAR *p;
+	struct yaffs_dev *retval = NULL;
+	struct yaffs_dev *dev = NULL;
+	int thisMatchLength;
+	int longestMatch = -1;
+	int matching;
+
+	/*
+	 * Check all configs, choose the one that:
+	 * 1) Actually matches a prefix (ie /a amd /abc will not match
+	 * 2) Matches the longest.
+	 */
+	list_for_each(cfg, &yaffsfs_deviceList) {
+		dev = list_entry(cfg, struct yaffs_dev, dev_list);
+		leftOver = path;
+		p = dev->param.name;
+		thisMatchLength = 0;
+		matching = 1;
+
+		while (matching && *p && *leftOver) {
+			/* Skip over any /s */
+			while (yaffsfs_IsPathDivider(*p))
+				p++;
+
+			/* Skip over any /s */
+			while (yaffsfs_IsPathDivider(*leftOver))
+				leftOver++;
+
+			/* Now match the text part */
+			while (matching &&
+			       *p && !yaffsfs_IsPathDivider(*p) &&
+			       *leftOver && !yaffsfs_IsPathDivider(*leftOver)) {
+				if (yaffsfs_Match(*p, *leftOver)) {
+					p++;
+					leftOver++;
+					thisMatchLength++;
+				} else {
+					matching = 0;
+				}
+			}
+		}
+
+		/* Skip over any /s in leftOver */
+		while (yaffsfs_IsPathDivider(*leftOver))
+			leftOver++;
+
+		/*Skip over any /s in p */
+		while (yaffsfs_IsPathDivider(*p))
+			p++;
+
+		/* p should now be at the end of the string if fully matched */
+		if (*p)
+			matching = 0;
+
+		if (matching && (thisMatchLength > longestMatch)) {
+			/* Matched prefix */
+			*restOfPath = (YCHAR *) leftOver;
+			retval = dev;
+			longestMatch = thisMatchLength;
+		}
+
+	}
+	return retval;
+}
+
+static int yaffsfs_CheckPath(const YCHAR *path)
+{
+	int n = 0;
+	int divs = 0;
+
+	while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) {
+		if (yaffsfs_IsPathDivider(*path)) {
+			n = 0;
+			divs++;
+		} else
+			n++;
+		path++;
+	}
+
+	return (*path) ? -1 : 0;
+}
+
+/* FindMountPoint only returns a dev entry if the path is a mount point */
+static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
+{
+	struct yaffs_dev *dev;
+	YCHAR *restOfPath = NULL;
+
+	dev = yaffsfs_FindDevice(path, &restOfPath);
+	if (dev && restOfPath && *restOfPath)
+		dev = NULL;
+	return dev;
+}
+
+static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path,
+					  YCHAR **restOfPath)
+{
+	struct yaffs_dev *dev;
+
+	dev = yaffsfs_FindDevice(path, restOfPath);
+	if (dev && dev->is_mounted)
+		return dev->root_dir;
+
+	return NULL;
+}
+
+static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
+					    int symDepth, int *loop)
+{
+
+	if (obj)
+		obj = yaffs_get_equivalent_obj(obj);
+
+	while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
+		YCHAR *alias = obj->variant.symlink_variant.alias;
+
+		if (yaffsfs_IsPathDivider(*alias))
+			/* Starts with a /, need to scan from root up */
+			obj = yaffsfs_FindObject(NULL, alias, symDepth++,
+						 1, NULL, NULL, loop);
+		else
+			/*
+			 * Relative to here so use the parent of the
+			 * symlink as a start
+			 */
+			obj = yaffsfs_FindObject(obj->parent, alias, symDepth++,
+						 1, NULL, NULL, loop);
+	}
+	return obj;
+}
+
+/*
+ * yaffsfs_FindDirectory
+ * Parse a path to determine the directory and the name within the directory.
+ *
+ * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
+ */
+static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
+						 const YCHAR *path,
+						 YCHAR **name, int symDepth,
+						 int *notDir, int *loop)
+{
+	struct yaffs_obj *dir;
+	YCHAR *restOfPath;
+	YCHAR str[YAFFS_MAX_NAME_LENGTH + 1];
+	int i;
+
+	if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) {
+		if (loop)
+			*loop = 1;
+		return NULL;
+	}
+
+	if (startDir) {
+		dir = startDir;
+		restOfPath = (YCHAR *) path;
+	} else
+		dir = yaffsfs_FindRoot(path, &restOfPath);
+
+	while (dir) {
+		/*
+		 * parse off /.
+		 * curve ball: also throw away surplus '/'
+		 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
+		 */
+		while (yaffsfs_IsPathDivider(*restOfPath))
+			restOfPath++;	/* get rid of '/' */
+
+		*name = restOfPath;
+		i = 0;
+
+		while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) {
+			if (i < YAFFS_MAX_NAME_LENGTH) {
+				str[i] = *restOfPath;
+				str[i + 1] = '\0';
+				i++;
+			}
+			restOfPath++;
+		}
+
+		if (!*restOfPath)
+			/* got to the end of the string */
+			return dir;
+		else {
+			if (yaffs_strcmp(str, _Y(".")) == 0) {
+				/* Do nothing */
+			} else if (yaffs_strcmp(str, _Y("..")) == 0) {
+				dir = dir->parent;
+			} else {
+				dir = yaffs_find_by_name(dir, str);
+
+				dir = yaffsfs_FollowLink(dir, symDepth, loop);
+
+				if (dir && dir->variant_type !=
+				    YAFFS_OBJECT_TYPE_DIRECTORY) {
+					if (notDir)
+						*notDir = 1;
+					dir = NULL;
+				}
+
+			}
+		}
+	}
+	/* directory did not exist. */
+	return NULL;
+}
+
+static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
+					       const YCHAR *path,
+					       YCHAR **name,
+					       int symDepth,
+					       int *notDir, int *loop)
+{
+	return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir,
+						loop);
+}
+
+/*
+ * yaffsfs_FindObject turns a path for an existing object into the object
+ */
+static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
+					    const YCHAR *path, int symDepth,
+					    int getEquiv,
+					    struct yaffs_obj **dirOut,
+					    int *notDir, int *loop)
+{
+	struct yaffs_obj *dir;
+	struct yaffs_obj *obj;
+	YCHAR *name;
+
+	dir =
+	    yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop);
+
+	if (dirOut)
+		*dirOut = dir;
+
+	if (dir && *name)
+		obj = yaffs_find_by_name(dir, name);
+	else
+		obj = dir;
+
+	if (getEquiv)
+		obj = yaffs_get_equivalent_obj(obj);
+
+	return obj;
+}
+
+/*************************************************************************
+ *	Start of yaffsfs visible functions.
+ *************************************************************************/
+
+int yaffs_dup(int handle)
+{
+	int newHandleNumber = -1;
+	struct yaffsfs_FileDes *existingFD = NULL;
+	struct yaffsfs_Handle *existingHandle = NULL;
+	struct yaffsfs_Handle *newHandle = NULL;
+
+	yaffsfs_Lock();
+	existingHandle = yaffsfs_HandleToPointer(handle);
+	existingFD = yaffsfs_HandleToFileDes(handle);
+	if (existingFD)
+		newHandleNumber = yaffsfs_NewHandle(&newHandle);
+	if (newHandle) {
+		newHandle->fdId = existingHandle->fdId;
+		existingFD->handleCount++;
+	}
+
+	yaffsfs_Unlock();
+
+	if (!existingFD)
+		yaffsfs_SetError(-EBADF);
+	else if (!newHandle)
+		yaffsfs_SetError(-ENOMEM);
+
+	return newHandleNumber;
+
+}
+
+static int yaffsfs_TooManyObjects(struct yaffs_dev *dev)
+{
+	int current_objects = dev->n_obj - dev->n_deleted_files;
+
+	if (dev->param.max_objects && current_objects > dev->param.max_objects)
+		return 1;
+	else
+		return 0;
+}
+
+int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	YCHAR *name;
+	int handle = -1;
+	struct yaffsfs_FileDes *fd = NULL;
+	int openDenied = 0;
+	int symDepth = 0;
+	int errorReported = 0;
+	int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY);
+	u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
+	u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
+	u8 sharedReadAllowed;
+	u8 sharedWriteAllowed;
+	u8 alreadyReading;
+	u8 alreadyWriting;
+	u8 readRequested;
+	u8 writeRequested;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	/* O_EXCL only has meaning if O_CREAT is specified */
+	if (!(oflag & O_CREAT))
+		oflag &= ~(O_EXCL);
+
+	/* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
+	if ((oflag & O_CREAT) & (oflag & O_EXCL))
+		oflag &= ~(O_TRUNC);
+
+	/* Todo: Are there any more flag combos to sanitise ? */
+
+	/* Figure out if reading or writing is requested */
+
+	readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
+	writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
+
+	yaffsfs_Lock();
+
+	handle = yaffsfs_NewHandleAndFileDes();
+
+	if (handle < 0) {
+		yaffsfs_SetError(-ENFILE);
+		errorReported = 1;
+	} else {
+
+		fd = yaffsfs_HandleToFileDes(handle);
+
+		/* try to find the exisiting object */
+		obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
+
+		obj = yaffsfs_FollowLink(obj, symDepth++, &loop);
+
+		if (obj &&
+		    obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
+		    obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+			obj = NULL;
+
+		if (obj) {
+
+			/* The file already exists or it might be a directory */
+
+			/* A directory can't be opened as a file */
+			if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+				openDenied = 1;
+				yaffsfs_SetError(-EISDIR);
+				errorReported = 1;
+			}
+
+			/* Open should fail if O_CREAT and O_EXCL are specified
+			 * for a file that exists.
+			 */
+			if (!errorReported &&
+			    (oflag & O_EXCL) && (oflag & O_CREAT)) {
+				openDenied = 1;
+				yaffsfs_SetError(-EEXIST);
+				errorReported = 1;
+			}
+
+			/* Check file permissions */
+			if (readRequested && !(obj->yst_mode & S_IREAD))
+				openDenied = 1;
+
+			if (writeRequested && !(obj->yst_mode & S_IWRITE))
+				openDenied = 1;
+
+			if (!errorReported && writeRequested &&
+			    obj->my_dev->read_only) {
+				openDenied = 1;
+				yaffsfs_SetError(-EROFS);
+				errorReported = 1;
+			}
+
+			if (openDenied && !errorReported) {
+				yaffsfs_SetError(-EACCES);
+				errorReported = 1;
+			}
+
+			/* Check sharing of an existing object. */
+			if (!openDenied) {
+				struct yaffsfs_FileDes *fdx;
+				int i;
+
+				sharedReadAllowed = 1;
+				sharedWriteAllowed = 1;
+				alreadyReading = 0;
+				alreadyWriting = 0;
+				for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
+					fdx = &yaffsfs_fd[i];
+					if (fdx->handleCount > 0 &&
+					    fdx->inodeId >= 0 &&
+					    yaffsfs_inode[fdx->inodeId].iObj
+					    == obj) {
+						if (!fdx->shareRead)
+							sharedReadAllowed = 0;
+						if (!fdx->shareWrite)
+							sharedWriteAllowed = 0;
+						if (fdx->reading)
+							alreadyReading = 1;
+						if (fdx->writing)
+							alreadyWriting = 1;
+					}
+				}
+
+				if ((!sharedReadAllowed && readRequested) ||
+				    (!shareRead && alreadyReading) ||
+				    (!sharedWriteAllowed && writeRequested) ||
+				    (!shareWrite && alreadyWriting)) {
+					openDenied = 1;
+					yaffsfs_SetError(-EBUSY);
+					errorReported = 1;
+				}
+			}
+
+		}
+
+		/* If we could not open an existing object, then let's see if
+		 * the directory exists. If not, error.
+		 */
+		if (!obj && !errorReported) {
+			dir = yaffsfs_FindDirectory(NULL, path, &name, 0,
+						    &notDir, &loop);
+			if (!dir && notDir) {
+				yaffsfs_SetError(-ENOTDIR);
+				errorReported = 1;
+			} else if (loop) {
+				yaffsfs_SetError(-ELOOP);
+				errorReported = 1;
+			} else if (!dir) {
+				yaffsfs_SetError(-ENOENT);
+				errorReported = 1;
+			}
+		}
+
+		if (!obj && dir && !errorReported && (oflag & O_CREAT)) {
+			/* Let's see if we can create this file */
+			if (dir->my_dev->read_only) {
+				yaffsfs_SetError(-EROFS);
+				errorReported = 1;
+			} else if (yaffsfs_TooManyObjects(dir->my_dev)) {
+				yaffsfs_SetError(-ENFILE);
+				errorReported = 1;
+			} else
+				obj = yaffs_create_file(dir, name, mode, 0, 0);
+
+			if (!obj && !errorReported) {
+				yaffsfs_SetError(-ENOSPC);
+				errorReported = 1;
+			}
+		}
+
+		if (!obj && dir && !errorReported && !(oflag & O_CREAT)) {
+			yaffsfs_SetError(-ENOENT);
+			errorReported = 1;
+		}
+
+		if (obj && !openDenied) {
+			int inodeId = yaffsfs_GetInodeIdForObject(obj);
+
+			if (inodeId < 0) {
+				/*
+				 * Todo: Fix any problem if inodes run out,
+				 * That can't happen if the number of inode
+				 * items >= number of handles.
+				 */
+			}
+
+			fd->inodeId = inodeId;
+			fd->reading = readRequested;
+			fd->writing = writeRequested;
+			fd->append = (oflag & O_APPEND) ? 1 : 0;
+			fd->position = 0;
+			fd->shareRead = shareRead;
+			fd->shareWrite = shareWrite;
+
+			/* Hook inode to object */
+			obj->my_inode = (void *)&yaffsfs_inode[inodeId];
+
+			if ((oflag & O_TRUNC) && fd->writing)
+				yaffs_resize_file(obj, 0);
+		} else {
+			yaffsfs_PutHandle(handle);
+			if (!errorReported)
+				yaffsfs_SetError(0);	/* Problem */
+			handle = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return handle;
+}
+
+int yaffs_open(const YCHAR *path, int oflag, int mode)
+{
+	return yaffs_open_sharing(path, oflag, mode,
+				  YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
+}
+
+int yaffs_Dofsync(int handle, int datasync)
+{
+	int retVal = -1;
+	struct yaffs_obj *obj;
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!obj)
+		yaffsfs_SetError(-EBADF);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else {
+		yaffs_flush_file(obj, 1, datasync);
+		retVal = 0;
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+int yaffs_fsync(int handle)
+{
+	return yaffs_Dofsync(handle, 0);
+}
+
+int yaffs_flush(int handle)
+{
+	return yaffs_fsync(handle);
+}
+
+int yaffs_fdatasync(int handle)
+{
+	return yaffs_Dofsync(handle, 1);
+}
+
+int yaffs_close(int handle)
+{
+	struct yaffsfs_Handle *h = NULL;
+	struct yaffs_obj *obj = NULL;
+	int retVal = -1;
+
+	yaffsfs_Lock();
+
+	h = yaffsfs_HandleToPointer(handle);
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!h || !obj)
+		yaffsfs_SetError(-EBADF);
+	else {
+		/* clean up */
+		yaffs_flush_file(obj, 1, 0);
+		yaffsfs_PutHandle(handle);
+		retVal = 0;
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte,
+		    int isPread, loff_t offset)
+{
+	struct yaffsfs_FileDes *fd = NULL;
+	struct yaffs_obj *obj = NULL;
+	loff_t pos = 0;
+	loff_t startPos = 0;
+	loff_t endPos = 0;
+	int nRead = 0;
+	int nToRead = 0;
+	int totalRead = 0;
+	loff_t maxRead;
+	u8 *buf = (u8 *) vbuf;
+
+	if (!vbuf) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	fd = yaffsfs_HandleToFileDes(handle);
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!fd || !obj) {
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+		totalRead = -1;
+	} else if (!fd->reading) {
+		/* Not a reading handle */
+		yaffsfs_SetError(-EINVAL);
+		totalRead = -1;
+	} else if (nbyte > YAFFS_MAX_FILE_SIZE) {
+		yaffsfs_SetError(-EINVAL);
+		totalRead = -1;
+	} else {
+		if (isPread)
+			startPos = offset;
+		else
+			startPos = fd->position;
+
+		pos = startPos;
+
+		if (yaffs_get_obj_length(obj) > pos)
+			maxRead = yaffs_get_obj_length(obj) - pos;
+		else
+			maxRead = 0;
+
+		if (nbyte > maxRead)
+			nbyte = maxRead;
+
+		yaffsfs_GetHandle(handle);
+
+		endPos = pos + nbyte;
+
+		if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
+		    nbyte > YAFFS_MAX_FILE_SIZE ||
+		    endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
+			totalRead = -1;
+			nbyte = 0;
+		}
+
+		while (nbyte > 0) {
+			nToRead = YAFFSFS_RW_SIZE -
+			    (pos & (YAFFSFS_RW_SIZE - 1));
+			if (nToRead > nbyte)
+				nToRead = nbyte;
+
+			/* Tricky bit...
+			 * Need to reverify object in case the device was
+			 * unmounted in another thread.
+			 */
+			obj = yaffsfs_HandleToObject(handle);
+			if (!obj)
+				nRead = 0;
+			else
+				nRead = yaffs_file_rd(obj, buf, pos, nToRead);
+
+			if (nRead > 0) {
+				totalRead += nRead;
+				pos += nRead;
+				buf += nRead;
+			}
+
+			if (nRead == nToRead)
+				nbyte -= nRead;
+			else
+				nbyte = 0;	/* no more to read */
+
+			if (nbyte > 0) {
+				yaffsfs_Unlock();
+				yaffsfs_Lock();
+			}
+
+		}
+
+		yaffsfs_PutHandle(handle);
+
+		if (!isPread) {
+			if (totalRead >= 0)
+				fd->position = startPos + totalRead;
+			else
+				yaffsfs_SetError(-EINVAL);
+		}
+
+	}
+
+	yaffsfs_Unlock();
+
+	return (totalRead >= 0) ? totalRead : -1;
+
+}
+
+int yaffs_read(int handle, void *buf, unsigned int nbyte)
+{
+	return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
+}
+
+int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset)
+{
+	return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
+}
+
+int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
+		     int isPwrite, loff_t offset)
+{
+	struct yaffsfs_FileDes *fd = NULL;
+	struct yaffs_obj *obj = NULL;
+	loff_t pos = 0;
+	loff_t startPos = 0;
+	loff_t endPos;
+	int nWritten = 0;
+	int totalWritten = 0;
+	int write_trhrough = 0;
+	int nToWrite = 0;
+	const u8 *buf = (const u8 *)vbuf;
+
+	if (!vbuf) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	fd = yaffsfs_HandleToFileDes(handle);
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!fd || !obj) {
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+		totalWritten = -1;
+	} else if (!fd->writing) {
+		yaffsfs_SetError(-EINVAL);
+		totalWritten = -1;
+	} else if (obj->my_dev->read_only) {
+		yaffsfs_SetError(-EROFS);
+		totalWritten = -1;
+	} else {
+		if (fd->append)
+			startPos = yaffs_get_obj_length(obj);
+		else if (isPwrite)
+			startPos = offset;
+		else
+			startPos = fd->position;
+
+		yaffsfs_GetHandle(handle);
+		pos = startPos;
+		endPos = pos + nbyte;
+
+		if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
+		    nbyte > YAFFS_MAX_FILE_SIZE ||
+		    endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
+			totalWritten = -1;
+			nbyte = 0;
+		}
+
+		while (nbyte > 0) {
+
+			nToWrite = YAFFSFS_RW_SIZE -
+			    (pos & (YAFFSFS_RW_SIZE - 1));
+			if (nToWrite > nbyte)
+				nToWrite = nbyte;
+
+			/* Tricky bit...
+			 * Need to reverify object in case the device was
+			 * remounted or unmounted in another thread.
+			 */
+			obj = yaffsfs_HandleToObject(handle);
+			if (!obj || obj->my_dev->read_only)
+				nWritten = 0;
+			else
+				nWritten =
+				    yaffs_wr_file(obj, buf, pos, nToWrite,
+						  write_trhrough);
+			if (nWritten > 0) {
+				totalWritten += nWritten;
+				pos += nWritten;
+				buf += nWritten;
+			}
+
+			if (nWritten == nToWrite)
+				nbyte -= nToWrite;
+			else
+				nbyte = 0;
+
+			if (nWritten < 1 && totalWritten < 1) {
+				yaffsfs_SetError(-ENOSPC);
+				totalWritten = -1;
+			}
+
+			if (nbyte > 0) {
+				yaffsfs_Unlock();
+				yaffsfs_Lock();
+			}
+		}
+
+		yaffsfs_PutHandle(handle);
+
+		if (!isPwrite) {
+			if (totalWritten > 0)
+				fd->position = startPos + totalWritten;
+			else
+				yaffsfs_SetError(-EINVAL);
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return (totalWritten >= 0) ? totalWritten : -1;
+}
+
+int yaffs_write(int fd, const void *buf, unsigned int nbyte)
+{
+	return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
+}
+
+int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset)
+{
+	return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
+}
+
+int yaffs_truncate(const YCHAR *path, loff_t new_size)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int result = YAFFS_FAIL;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+	obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
+		yaffsfs_SetError(-EISDIR);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
+		yaffsfs_SetError(-EINVAL);
+	else
+		result = yaffs_resize_file(obj, new_size);
+
+	yaffsfs_Unlock();
+
+	return (result) ? 0 : -1;
+}
+
+int yaffs_ftruncate(int handle, loff_t new_size)
+{
+	struct yaffsfs_FileDes *fd = NULL;
+	struct yaffs_obj *obj = NULL;
+	int result = 0;
+
+	yaffsfs_Lock();
+	fd = yaffsfs_HandleToFileDes(handle);
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!fd || !obj)
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+	else if (!fd->writing)
+		yaffsfs_SetError(-EINVAL);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
+		yaffsfs_SetError(-EINVAL);
+	else
+		/* resize the file */
+		result = yaffs_resize_file(obj, new_size);
+	yaffsfs_Unlock();
+
+	return (result) ? 0 : -1;
+
+}
+
+loff_t yaffs_lseek(int handle, loff_t offset, int whence)
+{
+	struct yaffsfs_FileDes *fd = NULL;
+	struct yaffs_obj *obj = NULL;
+	loff_t pos = -1;
+	loff_t fSize = -1;
+
+	yaffsfs_Lock();
+	fd = yaffsfs_HandleToFileDes(handle);
+	obj = yaffsfs_HandleToObject(handle);
+
+	if (!fd || !obj)
+		yaffsfs_SetError(-EBADF);
+	else if (offset > YAFFS_MAX_FILE_SIZE)
+		yaffsfs_SetError(-EINVAL);
+	else {
+		if (whence == SEEK_SET) {
+			if (offset >= 0)
+				pos = offset;
+		} else if (whence == SEEK_CUR) {
+			if ((fd->position + offset) >= 0)
+				pos = (fd->position + offset);
+		} else if (whence == SEEK_END) {
+			fSize = yaffs_get_obj_length(obj);
+			if (fSize >= 0 && (fSize + offset) >= 0)
+				pos = fSize + offset;
+		}
+
+		if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
+			fd->position = pos;
+		else {
+			yaffsfs_SetError(-EINVAL);
+			pos = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return pos;
+}
+
+int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory)
+{
+	struct yaffs_obj *dir = NULL;
+	struct yaffs_obj *obj = NULL;
+	YCHAR *name;
+	int result = YAFFS_FAIL;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL);
+	dir = yaffsfs_FindDirectory(NULL, path, &name, 0, &notDir, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir)
+		yaffsfs_SetError(-ENOENT);
+	else if (yaffs_strncmp(name, _Y("."), 2) == 0)
+		yaffsfs_SetError(-EINVAL);
+	else if (!obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (!isDirectory &&
+		 obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
+		yaffsfs_SetError(-EISDIR);
+	else if (isDirectory &&
+		 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (isDirectory && obj == obj->my_dev->root_dir)
+		yaffsfs_SetError(-EBUSY);	/* Can't rmdir a root */
+	else {
+		result = yaffs_unlinker(dir, name);
+
+		if (result == YAFFS_FAIL && isDirectory)
+			yaffsfs_SetError(-ENOTEMPTY);
+	}
+
+	yaffsfs_Unlock();
+
+	return (result == YAFFS_FAIL) ? -1 : 0;
+}
+
+int yaffs_unlink(const YCHAR *path)
+{
+	return yaffsfs_DoUnlink(path, 0);
+}
+
+int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
+{
+	struct yaffs_obj *olddir = NULL;
+	struct yaffs_obj *newdir = NULL;
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *newobj = NULL;
+	YCHAR *oldname;
+	YCHAR *newname;
+	int result = YAFFS_FAIL;
+	int rename_allowed = 1;
+	int notOldDir = 0;
+	int notNewDir = 0;
+	int oldLoop = 0;
+	int newLoop = 0;
+
+	YCHAR *alt_newpath = NULL;
+
+	if (!oldPath || !newPath) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) {
+		yaffsfs_SetError(-ENOMEM);
+		return -1;
+	}
+	if (alt_newpath)
+		newPath = alt_newpath;
+
+	yaffsfs_Lock();
+
+	olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0,
+				       &notOldDir, &oldLoop);
+	newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0,
+				       &notNewDir, &newLoop);
+	obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL);
+	newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL);
+
+	/* If the object being renamed is a directory and the
+	 * path ended with a "/" then the olddir == obj.
+	 * We pass through NULL for the old name to tell the lower layers
+	 * to use olddir as the object.
+	 */
+
+	if (olddir == obj)
+		oldname = NULL;
+
+	if ((!olddir && notOldDir) || (!newdir && notNewDir)) {
+		yaffsfs_SetError(-ENOTDIR);
+		rename_allowed = 0;
+	} else if (oldLoop || newLoop) {
+		yaffsfs_SetError(-ELOOP);
+		rename_allowed = 0;
+	} else if (olddir && oldname &&
+			yaffs_strncmp(oldname, _Y("."), 2) == 0) {
+		yaffsfs_SetError(-EINVAL);
+		rename_allowed = 0;
+	} else if (!olddir || !newdir || !obj) {
+		yaffsfs_SetError(-ENOENT);
+		rename_allowed = 0;
+	} else if (obj->my_dev->read_only) {
+		yaffsfs_SetError(-EROFS);
+		rename_allowed = 0;
+	} else if (yaffs_is_non_empty_dir(newobj)) {
+		yaffsfs_SetError(-ENOTEMPTY);
+		rename_allowed = 0;
+	} else if (olddir->my_dev != newdir->my_dev) {
+		/* Rename must be on same device */
+		yaffsfs_SetError(-EXDEV);
+		rename_allowed = 0;
+	} else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+		/*
+		 * It is a directory, check that it is not being renamed to
+		 * being its own decendent.
+		 * Do this by tracing from the new directory back to the root,
+		 * checking for obj
+		 */
+
+		struct yaffs_obj *xx = newdir;
+
+		while (rename_allowed && xx) {
+			if (xx == obj)
+				rename_allowed = 0;
+			xx = xx->parent;
+		}
+		if (!rename_allowed)
+			yaffsfs_SetError(-EINVAL);
+	}
+
+	if (rename_allowed)
+		result = yaffs_rename_obj(olddir, oldname, newdir, newname);
+
+	yaffsfs_Unlock();
+
+	kfree(alt_newpath);
+
+	return (result == YAFFS_FAIL) ? -1 : 0;
+}
+
+static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf)
+{
+	int retVal = -1;
+
+	obj = yaffs_get_equivalent_obj(obj);
+
+	if (obj && buf) {
+		buf->st_dev = (int)obj->my_dev->os_context;
+		buf->st_ino = obj->obj_id;
+		buf->st_mode = obj->yst_mode & ~S_IFMT;
+
+		if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
+			buf->st_mode |= S_IFDIR;
+		else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
+			buf->st_mode |= S_IFLNK;
+		else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
+			buf->st_mode |= S_IFREG;
+
+		buf->st_nlink = yaffs_get_obj_link_count(obj);
+		buf->st_uid = 0;
+		buf->st_gid = 0;
+		buf->st_rdev = obj->yst_rdev;
+		buf->st_size = yaffs_get_obj_length(obj);
+		buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
+		buf->st_blocks = lldiv(buf->st_size + buf->st_blksize - 1,
+		    buf->st_blksize);
+#if CONFIG_YAFFS_WINCE
+		buf->yst_wince_atime[0] = obj->win_atime[0];
+		buf->yst_wince_atime[1] = obj->win_atime[1];
+		buf->yst_wince_ctime[0] = obj->win_ctime[0];
+		buf->yst_wince_ctime[1] = obj->win_ctime[1];
+		buf->yst_wince_mtime[0] = obj->win_mtime[0];
+		buf->yst_wince_mtime[1] = obj->win_mtime[1];
+#else
+		buf->yst_atime = obj->yst_atime;
+		buf->yst_ctime = obj->yst_ctime;
+		buf->yst_mtime = obj->yst_mtime;
+#endif
+		retVal = 0;
+	}
+	return retVal;
+}
+
+static int yaffsfs_DoStatOrLStat(const YCHAR *path,
+				 struct yaffs_stat *buf, int doLStat)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path || !buf) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (!doLStat && obj)
+		obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else
+		retVal = yaffsfs_DoStat(obj, buf);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
+{
+	return yaffsfs_DoStatOrLStat(path, buf, 0);
+}
+
+int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
+{
+	return yaffsfs_DoStatOrLStat(path, buf, 1);
+}
+
+int yaffs_fstat(int fd, struct yaffs_stat *buf)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	if (!buf) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj)
+		retVal = yaffsfs_DoStat(obj, buf);
+	else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+static int yaffsfs_DoUtime(struct yaffs_obj *obj,
+			   const struct yaffs_utimbuf *buf)
+{
+	int retVal = -1;
+	int result;
+
+	struct yaffs_utimbuf local;
+
+	obj = yaffs_get_equivalent_obj(obj);
+
+	if (obj && obj->my_dev->read_only) {
+		yaffsfs_SetError(-EROFS);
+		return -1;
+	}
+
+	if (!buf) {
+		local.actime = Y_CURRENT_TIME;
+		local.modtime = local.actime;
+		buf = &local;
+	}
+
+	if (obj) {
+		obj->yst_atime = buf->actime;
+		obj->yst_mtime = buf->modtime;
+		obj->dirty = 1;
+		result = yaffs_flush_file(obj, 0, 0);
+		retVal = result == YAFFS_OK ? 0 : -1;
+	}
+
+	return retVal;
+}
+
+int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else
+		retVal = yaffsfs_DoUtime(obj, buf);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_futime(int fd, const struct yaffs_utimbuf *buf)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj)
+		retVal = yaffsfs_DoUtime(obj, buf);
+	else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+#ifndef CONFIG_YAFFS_WINCE
+/* xattrib functions */
+
+static int yaffs_do_setxattr(const YCHAR *path, const char *name,
+			     const void *data, int size, int flags, int follow)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_obj *dir;
+	int notDir = 0;
+	int loop = 0;
+
+	int retVal = -1;
+
+	if (!path || !name || !data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (follow)
+		obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else {
+		retVal = yaffs_set_xattrib(obj, name, data, size, flags);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_setxattr(const YCHAR *path, const char *name,
+		   const void *data, int size, int flags)
+{
+	return yaffs_do_setxattr(path, name, data, size, flags, 1);
+}
+
+int yaffs_lsetxattr(const YCHAR *path, const char *name,
+		    const void *data, int size, int flags)
+{
+	return yaffs_do_setxattr(path, name, data, size, flags, 0);
+}
+
+int yaffs_fsetxattr(int fd, const char *name,
+		    const void *data, int size, int flags)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	if (!name || !data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (!obj)
+		yaffsfs_SetError(-EBADF);
+	else {
+		retVal = yaffs_set_xattrib(obj, name, data, size, flags);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+static int yaffs_do_getxattr(const YCHAR *path, const char *name,
+			     void *data, int size, int follow)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_obj *dir;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path || !name || !data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (follow)
+		obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else {
+		retVal = yaffs_get_xattrib(obj, name, data, size);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	}
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
+{
+	return yaffs_do_getxattr(path, name, data, size, 1);
+}
+
+int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
+{
+	return yaffs_do_getxattr(path, name, data, size, 0);
+}
+
+int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	if (!name || !data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj) {
+		retVal = yaffs_get_xattrib(obj, name, data, size);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	} else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+static int yaffs_do_listxattr(const YCHAR *path, char *data,
+			      int size, int follow)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path || !data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (follow)
+		obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else {
+		retVal = yaffs_list_xattrib(obj, data, size);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_listxattr(const YCHAR *path, char *data, int size)
+{
+	return yaffs_do_listxattr(path, data, size, 1);
+}
+
+int yaffs_llistxattr(const YCHAR *path, char *data, int size)
+{
+	return yaffs_do_listxattr(path, data, size, 0);
+}
+
+int yaffs_flistxattr(int fd, char *data, int size)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	if (!data) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj) {
+		retVal = yaffs_list_xattrib(obj, data, size);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	} else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+static int yaffs_do_removexattr(const YCHAR *path, const char *name,
+				int follow)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int notDir = 0;
+	int loop = 0;
+	int retVal = -1;
+
+	if (!path || !name) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (follow)
+		obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else {
+		retVal = yaffs_remove_xattrib(obj, name);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_removexattr(const YCHAR *path, const char *name)
+{
+	return yaffs_do_removexattr(path, name, 1);
+}
+
+int yaffs_lremovexattr(const YCHAR *path, const char *name)
+{
+	return yaffs_do_removexattr(path, name, 0);
+}
+
+int yaffs_fremovexattr(int fd, const char *name)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	if (!name) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj) {
+		retVal = yaffs_remove_xattrib(obj, name);
+		if (retVal < 0) {
+			yaffsfs_SetError(retVal);
+			retVal = -1;
+		}
+	} else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+#endif
+
+#ifdef CONFIG_YAFFS_WINCE
+int yaffs_get_wince_times(int fd, unsigned *wctime,
+			  unsigned *watime, unsigned *wmtime)
+{
+	struct yaffs_obj *obj;
+
+	int retVal = -1;
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj) {
+
+		if (wctime) {
+			wctime[0] = obj->win_ctime[0];
+			wctime[1] = obj->win_ctime[1];
+		}
+		if (watime) {
+			watime[0] = obj->win_atime[0];
+			watime[1] = obj->win_atime[1];
+		}
+		if (wmtime) {
+			wmtime[0] = obj->win_mtime[0];
+			wmtime[1] = obj->win_mtime[1];
+		}
+
+		retVal = 0;
+	} else
+		/*  bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+int yaffs_set_wince_times(int fd,
+			  const unsigned *wctime,
+			  const unsigned *watime, const unsigned *wmtime)
+{
+	struct yaffs_obj *obj;
+	int result;
+	int retVal = -1;
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (obj) {
+
+		if (wctime) {
+			obj->win_ctime[0] = wctime[0];
+			obj->win_ctime[1] = wctime[1];
+		}
+		if (watime) {
+			obj->win_atime[0] = watime[0];
+			obj->win_atime[1] = watime[1];
+		}
+		if (wmtime) {
+			obj->win_mtime[0] = wmtime[0];
+			obj->win_mtime[1] = wmtime[1];
+		}
+
+		obj->dirty = 1;
+		result = yaffs_flush_file(obj, 0, 0);
+		retVal = 0;
+	} else
+		/* bad handle */
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+#endif
+
+static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode)
+{
+	int result = -1;
+
+	if (obj)
+		obj = yaffs_get_equivalent_obj(obj);
+
+	if (obj) {
+		obj->yst_mode = mode;
+		obj->dirty = 1;
+		result = yaffs_flush_file(obj, 0, 0);
+	}
+
+	return result == YAFFS_OK ? 0 : -1;
+}
+
+int yaffs_access(const YCHAR *path, int amode)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int notDir = 0;
+	int loop = 0;
+	int retval = -1;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	if (amode & ~(R_OK | W_OK | X_OK)) {
+		yaffsfs_SetError(-EINVAL);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+	obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else if ((amode & W_OK) && obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else {
+		int access_ok = 1;
+
+		if ((amode & R_OK) && !(obj->yst_mode & S_IREAD))
+			access_ok = 0;
+		if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
+			access_ok = 0;
+		if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
+			access_ok = 0;
+
+		if (!access_ok)
+			yaffsfs_SetError(-EACCES);
+		else
+			retval = 0;
+	}
+
+	yaffsfs_Unlock();
+
+	return retval;
+
+}
+
+int yaffs_chmod(const YCHAR *path, mode_t mode)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	if (mode & ~(0777)) {
+		yaffsfs_SetError(-EINVAL);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+	obj = yaffsfs_FollowLink(obj, 0, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else
+		retVal = yaffsfs_DoChMod(obj, mode);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_fchmod(int fd, mode_t mode)
+{
+	struct yaffs_obj *obj;
+	int retVal = -1;
+
+	if (mode & ~(0777)) {
+		yaffsfs_SetError(-EINVAL);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	obj = yaffsfs_HandleToObject(fd);
+
+	if (!obj)
+		yaffsfs_SetError(-EBADF);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else
+		retVal = yaffsfs_DoChMod(obj, mode);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+int yaffs_mkdir(const YCHAR *path, mode_t mode)
+{
+	struct yaffs_obj *parent = NULL;
+	struct yaffs_obj *dir = NULL;
+	YCHAR *name;
+	YCHAR *alt_path = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
+		yaffsfs_SetError(-ENOMEM);
+		return -1;
+	}
+	if (alt_path)
+		path = alt_path;
+
+	yaffsfs_Lock();
+	parent = yaffsfs_FindDirectory(NULL, path, &name, 0, &notDir, &loop);
+	if (!parent && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!parent)
+		yaffsfs_SetError(-ENOENT);
+	else if (yaffsfs_TooManyObjects(parent->my_dev))
+		yaffsfs_SetError(-ENFILE);
+	else if (yaffs_strnlen(name, 5) == 0) {
+		/* Trying to make the root itself */
+		yaffsfs_SetError(-EEXIST);
+	} else if (parent->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else {
+		dir = yaffs_create_dir(parent, name, mode, 0, 0);
+		if (dir)
+			retVal = 0;
+		else if (yaffs_find_by_name(parent, name))
+			yaffsfs_SetError(-EEXIST);	/* name exists */
+		else
+			yaffsfs_SetError(-ENOSPC);	/* assume no space */
+	}
+
+	yaffsfs_Unlock();
+
+	kfree(alt_path);
+
+	return retVal;
+}
+
+int yaffs_rmdir(const YCHAR *path)
+{
+	int result;
+	YCHAR *alt_path;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
+		yaffsfs_SetError(-ENOMEM);
+		return -1;
+	}
+	if (alt_path)
+		path = alt_path;
+	result = yaffsfs_DoUnlink(path, 1);
+
+	kfree(alt_path);
+
+	return result;
+}
+
+void *yaffs_getdev(const YCHAR *path)
+{
+	struct yaffs_dev *dev = NULL;
+	YCHAR *dummy;
+	dev = yaffsfs_FindDevice(path, &dummy);
+	return (void *)dev;
+}
+
+int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt)
+{
+	int retVal = -1;
+	int result = YAFFS_FAIL;
+	struct yaffs_dev *dev = NULL;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path);
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	yaffsfs_InitHandles();
+
+	dev = yaffsfs_FindMountPoint(path);
+	if (dev) {
+		if (!dev->is_mounted) {
+			dev->read_only = read_only ? 1 : 0;
+			if (skip_checkpt) {
+				u8 skip = dev->param.skip_checkpt_rd;
+				dev->param.skip_checkpt_rd = 1;
+				result = yaffs_guts_initialise(dev);
+				dev->param.skip_checkpt_rd = skip;
+			} else {
+				result = yaffs_guts_initialise(dev);
+			}
+
+			if (result == YAFFS_FAIL)
+				yaffsfs_SetError(-ENOMEM);
+			retVal = result ? 0 : -1;
+
+		} else
+			yaffsfs_SetError(-EBUSY);
+	} else
+		yaffsfs_SetError(-ENODEV);
+
+	yaffsfs_Unlock();
+	return retVal;
+
+}
+
+int yaffs_mount2(const YCHAR *path, int readonly)
+{
+	return yaffs_mount_common(path, readonly, 0);
+}
+
+int yaffs_mount(const YCHAR *path)
+{
+	return yaffs_mount_common(path, 0, 0);
+}
+
+int yaffs_sync(const YCHAR *path)
+{
+	int retVal = -1;
+	struct yaffs_dev *dev = NULL;
+	YCHAR *dummy;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindDevice(path, &dummy);
+	if (dev) {
+		if (!dev->is_mounted)
+			yaffsfs_SetError(-EINVAL);
+		else if (dev->read_only)
+			yaffsfs_SetError(-EROFS);
+		else {
+
+			yaffs_flush_whole_cache(dev);
+			yaffs_checkpoint_save(dev);
+			retVal = 0;
+
+		}
+	} else
+		yaffsfs_SetError(-ENODEV);
+
+	yaffsfs_Unlock();
+	return retVal;
+}
+
+static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
+{
+	int i;
+	struct yaffs_obj *obj;
+
+	for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
+		obj = yaffsfs_HandleToObject(i);
+		if (obj && obj->my_dev == dev)
+			return 1;
+	}
+	return 0;
+}
+
+int yaffs_remount(const YCHAR *path, int force, int read_only)
+{
+	int retVal = -1;
+	struct yaffs_dev *dev = NULL;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindMountPoint(path);
+	if (dev) {
+		if (dev->is_mounted) {
+			yaffs_flush_whole_cache(dev);
+
+			if (force || !yaffsfs_IsDevBusy(dev)) {
+				if (read_only)
+					yaffs_checkpoint_save(dev);
+				dev->read_only = read_only ? 1 : 0;
+				retVal = 0;
+			} else
+				yaffsfs_SetError(-EBUSY);
+
+		} else
+			yaffsfs_SetError(-EINVAL);
+
+	} else
+		yaffsfs_SetError(-ENODEV);
+
+	yaffsfs_Unlock();
+	return retVal;
+
+}
+
+int yaffs_unmount2(const YCHAR *path, int force)
+{
+	int retVal = -1;
+	struct yaffs_dev *dev = NULL;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindMountPoint(path);
+	if (dev) {
+		if (dev->is_mounted) {
+			int inUse;
+			yaffs_flush_whole_cache(dev);
+			yaffs_checkpoint_save(dev);
+			inUse = yaffsfs_IsDevBusy(dev);
+			if (!inUse || force) {
+				if (inUse)
+					yaffsfs_BreakDeviceHandles(dev);
+				yaffs_deinitialise(dev);
+
+				retVal = 0;
+			} else
+				yaffsfs_SetError(-EBUSY);
+
+		} else
+			yaffsfs_SetError(-EINVAL);
+
+	} else
+		yaffsfs_SetError(-ENODEV);
+
+	yaffsfs_Unlock();
+	return retVal;
+
+}
+
+int yaffs_unmount(const YCHAR *path)
+{
+	return yaffs_unmount2(path, 0);
+}
+
+loff_t yaffs_freespace(const YCHAR *path)
+{
+	loff_t retVal = -1;
+	struct yaffs_dev *dev = NULL;
+	YCHAR *dummy;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindDevice(path, &dummy);
+	if (dev && dev->is_mounted) {
+		retVal = yaffs_get_n_free_chunks(dev);
+		retVal *= dev->data_bytes_per_chunk;
+
+	} else
+		yaffsfs_SetError(-EINVAL);
+
+	yaffsfs_Unlock();
+	return retVal;
+}
+
+loff_t yaffs_totalspace(const YCHAR *path)
+{
+	loff_t retVal = -1;
+	struct yaffs_dev *dev = NULL;
+	YCHAR *dummy;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindDevice(path, &dummy);
+	if (dev && dev->is_mounted) {
+		retVal = (dev->param.end_block - dev->param.start_block + 1) -
+		    dev->param.n_reserved_blocks;
+		retVal *= dev->param.chunks_per_block;
+		retVal *= dev->data_bytes_per_chunk;
+
+	} else
+		yaffsfs_SetError(-EINVAL);
+
+	yaffsfs_Unlock();
+	return retVal;
+}
+
+int yaffs_inodecount(const YCHAR *path)
+{
+	loff_t retVal = -1;
+	struct yaffs_dev *dev = NULL;
+	YCHAR *dummy;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dev = yaffsfs_FindDevice(path, &dummy);
+	if (dev && dev->is_mounted) {
+		int n_obj = dev->n_obj;
+		if (n_obj > dev->n_hardlinks)
+			retVal = n_obj - dev->n_hardlinks;
+	}
+
+	if (retVal < 0)
+		yaffsfs_SetError(-EINVAL);
+
+	yaffsfs_Unlock();
+	return retVal;
+}
+
+void yaffs_add_device(struct yaffs_dev *dev)
+{
+	struct list_head *cfg;
+	/* First check that the device is not in the list. */
+
+	list_for_each(cfg, &yaffsfs_deviceList) {
+		if (dev == list_entry(cfg, struct yaffs_dev, dev_list))
+			return;
+	}
+
+	dev->is_mounted = 0;
+	dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
+
+	if (!dev->dev_list.next)
+		INIT_LIST_HEAD(&dev->dev_list);
+
+	list_add(&dev->dev_list, &yaffsfs_deviceList);
+}
+
+void yaffs_remove_device(struct yaffs_dev *dev)
+{
+	list_del_init(&dev->dev_list);
+}
+
+/* Functions to iterate through devices. NB Use with extreme care! */
+
+static struct list_head *dev_iterator;
+void yaffs_dev_rewind(void)
+{
+	dev_iterator = yaffsfs_deviceList.next;
+}
+
+struct yaffs_dev *yaffs_next_dev(void)
+{
+	struct yaffs_dev *retval;
+
+	if (!dev_iterator)
+		return NULL;
+	if (dev_iterator == &yaffsfs_deviceList)
+		return NULL;
+
+	retval = list_entry(dev_iterator, struct yaffs_dev, dev_list);
+	dev_iterator = dev_iterator->next;
+	return retval;
+}
+
+/* Directory search stuff. */
+
+static struct list_head search_contexts;
+
+static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc)
+{
+	if (dsc &&
+	    dsc->dirObj &&
+	    dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+
+		dsc->offset = 0;
+
+		if (list_empty(&dsc->dirObj->variant.dir_variant.children))
+			dsc->nextReturn = NULL;
+		else
+			dsc->nextReturn =
+			    list_entry(dsc->dirObj->variant.dir_variant.
+				       children.next, struct yaffs_obj,
+				       siblings);
+	} else {
+		/* Hey someone isn't playing nice! */
+	}
+}
+
+static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc)
+{
+	if (dsc &&
+	    dsc->dirObj &&
+	    dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+
+		if (dsc->nextReturn == NULL ||
+		    list_empty(&dsc->dirObj->variant.dir_variant.children))
+			dsc->nextReturn = NULL;
+		else {
+			struct list_head *next = dsc->nextReturn->siblings.next;
+
+			if (next == &dsc->dirObj->variant.dir_variant.children)
+				dsc->nextReturn = NULL;	/* end of list */
+			else
+				dsc->nextReturn = list_entry(next,
+							     struct yaffs_obj,
+							     siblings);
+		}
+	} else {
+		/* Hey someone isn't playing nice! */
+	}
+}
+
+static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
+{
+
+	struct list_head *i;
+	struct yaffsfs_DirSearchContxt *dsc;
+
+	/* if search contexts not initilised then skip */
+	if (!search_contexts.next)
+		return;
+
+	/* Iterate through the directory search contexts.
+	 * If any are the one being removed, then advance the dsc to
+	 * the next one to prevent a hanging ptr.
+	 */
+	list_for_each(i, &search_contexts) {
+		if (i) {
+			dsc = list_entry(i, struct yaffsfs_DirSearchContxt,
+					 others);
+			if (dsc->nextReturn == obj)
+				yaffsfs_DirAdvance(dsc);
+		}
+	}
+
+}
+
+yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
+{
+	yaffs_DIR *dir = NULL;
+	struct yaffs_obj *obj = NULL;
+	struct yaffsfs_DirSearchContxt *dsc = NULL;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!dirname) {
+		yaffsfs_SetError(-EFAULT);
+		return NULL;
+	}
+
+	if (yaffsfs_CheckPath(dirname) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return NULL;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, &notDir, &loop);
+
+	if (!obj && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+		yaffsfs_SetError(-ENOTDIR);
+	else {
+		int i;
+
+		for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) {
+			if (!yaffsfs_dsc[i].inUse)
+				dsc = &yaffsfs_dsc[i];
+		}
+
+		dir = (yaffs_DIR *) dsc;
+
+		if (dsc) {
+			memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt));
+			dsc->inUse = 1;
+			dsc->dirObj = obj;
+			yaffs_strncpy(dsc->name, dirname, NAME_MAX);
+			INIT_LIST_HEAD(&dsc->others);
+
+			if (!search_contexts.next)
+				INIT_LIST_HEAD(&search_contexts);
+
+			list_add(&dsc->others, &search_contexts);
+			yaffsfs_SetDirRewound(dsc);
+		}
+
+	}
+
+	yaffsfs_Unlock();
+
+	return dir;
+}
+
+struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp)
+{
+	struct yaffsfs_DirSearchContxt *dsc;
+	struct yaffs_dirent *retVal = NULL;
+
+	dsc = (struct yaffsfs_DirSearchContxt *) dirp;
+	yaffsfs_Lock();
+
+	if (dsc && dsc->inUse) {
+		yaffsfs_SetError(0);
+		if (dsc->nextReturn) {
+			dsc->de.d_ino =
+			    yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
+			dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
+			dsc->de.d_off = dsc->offset++;
+			yaffs_get_obj_name(dsc->nextReturn,
+					   dsc->de.d_name, NAME_MAX);
+			if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) {
+				/* this should not happen! */
+				yaffs_strcpy(dsc->de.d_name, _Y("zz"));
+			}
+			dsc->de.d_reclen = sizeof(struct yaffs_dirent);
+			retVal = &dsc->de;
+			yaffsfs_DirAdvance(dsc);
+		} else
+			retVal = NULL;
+	} else
+		yaffsfs_SetError(-EBADF);
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+void yaffs_rewinddir(yaffs_DIR *dirp)
+{
+	struct yaffsfs_DirSearchContxt *dsc;
+
+	dsc = (struct yaffsfs_DirSearchContxt *) dirp;
+
+	yaffsfs_Lock();
+
+	yaffsfs_SetDirRewound(dsc);
+
+	yaffsfs_Unlock();
+}
+
+int yaffs_closedir(yaffs_DIR *dirp)
+{
+	struct yaffsfs_DirSearchContxt *dsc;
+
+	dsc = (struct yaffsfs_DirSearchContxt *) dirp;
+
+	if (!dsc) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	dsc->inUse = 0;
+	list_del(&dsc->others);	/* unhook from list */
+	yaffsfs_Unlock();
+	return 0;
+}
+
+/* End of directory stuff */
+
+int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
+{
+	struct yaffs_obj *parent = NULL;
+	struct yaffs_obj *obj;
+	YCHAR *name;
+	int retVal = -1;
+	int mode = 0;		/* ignore for now */
+	int notDir = 0;
+	int loop = 0;
+
+	if (!oldpath || !newpath) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+	parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, &notDir, &loop);
+	if (!parent && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!parent || yaffs_strnlen(name, 5) < 1)
+		yaffsfs_SetError(-ENOENT);
+	else if (yaffsfs_TooManyObjects(parent->my_dev))
+		yaffsfs_SetError(-ENFILE);
+	else if (parent->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (parent) {
+		obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath);
+		if (obj)
+			retVal = 0;
+		else if (yaffsfs_FindObject
+			 (NULL, newpath, 0, 0, NULL, NULL, NULL))
+			yaffsfs_SetError(-EEXIST);
+		else
+			yaffsfs_SetError(-ENOSPC);
+	}
+
+	yaffsfs_Unlock();
+
+	return retVal;
+
+}
+
+int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
+{
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *dir = NULL;
+	int retVal = -1;
+	int notDir = 0;
+	int loop = 0;
+
+	if (!path || !buf) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop);
+
+	if (!dir && notDir)
+		yaffsfs_SetError(-ENOTDIR);
+	else if (loop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
+		yaffsfs_SetError(-EINVAL);
+	else {
+		YCHAR *alias = obj->variant.symlink_variant.alias;
+		memset(buf, 0, bufsiz);
+		yaffs_strncpy(buf, alias, bufsiz - 1);
+		retVal = 0;
+	}
+	yaffsfs_Unlock();
+	return retVal;
+}
+
+int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
+{
+	/* Creates a link called newpath to existing oldpath */
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *lnk = NULL;
+	struct yaffs_obj *obj_dir = NULL;
+	struct yaffs_obj *lnk_dir = NULL;
+	int retVal = -1;
+	int notDirObj = 0;
+	int notDirLnk = 0;
+	int objLoop = 0;
+	int lnkLoop = 0;
+	YCHAR *newname;
+
+	if (!oldpath || !linkpath) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	yaffsfs_Lock();
+
+	obj = yaffsfs_FindObject(NULL, oldpath, 0, 1,
+				 &obj_dir, &notDirObj, &objLoop);
+	lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL);
+	lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname,
+					0, &notDirLnk, &lnkLoop);
+
+	if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
+		yaffsfs_SetError(-ENOTDIR);
+	else if (objLoop || lnkLoop)
+		yaffsfs_SetError(-ELOOP);
+	else if (!obj_dir || !lnk_dir || !obj)
+		yaffsfs_SetError(-ENOENT);
+	else if (obj->my_dev->read_only)
+		yaffsfs_SetError(-EROFS);
+	else if (yaffsfs_TooManyObjects(obj->my_dev))
+		yaffsfs_SetError(-ENFILE);
+	else if (lnk)
+		yaffsfs_SetError(-EEXIST);
+	else if (lnk_dir->my_dev != obj->my_dev)
+		yaffsfs_SetError(-EXDEV);
+	else {
+		retVal = yaffsfs_CheckNameLength(newname);
+
+		if (retVal == 0) {
+			lnk = yaffs_link_obj(lnk_dir, newname, obj);
+			if (lnk)
+				retVal = 0;
+			else {
+				yaffsfs_SetError(-ENOSPC);
+				retVal = -1;
+			}
+		}
+	}
+	yaffsfs_Unlock();
+
+	return retVal;
+}
+
+int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
+{
+	pathname = pathname;
+	mode = mode;
+	dev = dev;
+
+	yaffsfs_SetError(-EINVAL);
+	return -1;
+}
+
+/*
+ * D E B U G   F U N C T I O N S
+ */
+
+/*
+ * yaffs_n_handles()
+ * Returns number of handles attached to the object
+ */
+int yaffs_n_handles(const YCHAR *path)
+{
+	struct yaffs_obj *obj;
+
+	if (!path) {
+		yaffsfs_SetError(-EFAULT);
+		return -1;
+	}
+
+	if (yaffsfs_CheckPath(path) < 0) {
+		yaffsfs_SetError(-ENAMETOOLONG);
+		return -1;
+	}
+
+	obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
+
+	if (obj)
+		return yaffsfs_CountHandles(obj);
+	else
+		return -1;
+}
+
+int yaffs_get_error(void)
+{
+	return yaffsfs_GetLastError();
+}
+
+int yaffs_set_error(int error)
+{
+	yaffsfs_SetError(error);
+	return 0;
+}
+
+int yaffs_dump_dev(const YCHAR *path)
+{
+#if 1
+	path = path;
+#else
+	YCHAR *rest;
+
+	struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest);
+
+	if (obj) {
+		struct yaffs_dev *dev = obj->my_dev;
+
+		printf("\n"
+		       "n_page_writes.......... %d\n"
+		       "n_page_reads........... %d\n"
+		       "n_erasures....... %d\n"
+		       "n_gc_copies............ %d\n"
+		       "garbageCollections... %d\n"
+		       "passiveGarbageColl'ns %d\n"
+		       "\n",
+		       dev->n_page_writes,
+		       dev->n_page_reads,
+		       dev->n_erasures,
+		       dev->n_gc_copies,
+		       dev->garbageCollections, dev->passiveGarbageCollections);
+
+	}
+#endif
+	return 0;
+}