change linebreak in dfs_uffs.c to unix style

1 files changed, 658 insertions, 658 deletions

diff --git a/components/dfs/filesystems/uffs/dfs_uffs.c b/components/dfs/filesystems/uffs/dfs_uffs.c
index d4997faa98..3170bb364a 100644
--- a/components/dfs/filesystems/uffs/dfs_uffs.c
+++ b/components/dfs/filesystems/uffs/dfs_uffs.c
@@ -1,658 +1,658 @@
-/*

- * File      : rtthread.h

- * This file is part of RT-Thread RTOS

- * COPYRIGHT (C) 2006-2012, RT-Thread Development Team

- *

- * The license and distribution terms for this file may be

- * found in the file LICENSE in this distribution or at

- * http://www.rt-thread.org/license/LICENSE.

- *

- * Change Logs:

- * Date           Author       Notes

- * 2011-10-22     prife        the first version

- * 2012-03-28     prife        use mtd device interface

- * 2012-04-05     prife        update uffs with official repo and use uffs_UnMount/Mount

-*/

-#include <rtthread.h>

-

-#include <dfs_fs.h>

-#include <dfs_def.h>

-#include <rtdevice.h>

-#include "dfs_uffs.h"

-

-#include "uffs/uffs_fd.h" /* posix file api is here */

-#include "uffs/uffs_mtb.h"

-#include "uffs/uffs_mem.h"

-#include "uffs/uffs_utils.h"

-

-/*

- * RT-Thread DFS Interface for uffs

- */

-#define UFFS_DEVICE_MAX	        2	 /* the max partions on a nand deivce*/

-#define UFFS_MOUNT_PATH_MAX     128	 /* the mount point max length */

-#define FILE_PATH_MAX	        256	 /* the longest file path */

-

-struct _nand_dev

-{

-	struct rt_mtd_nand_device * dev;

-	struct uffs_StorageAttrSt storage;

-	uffs_Device uffs_dev;

-	uffs_MountTable mount_table;

-	char mount_path[UFFS_MOUNT_PATH_MAX];

-	void * data;  /* when uffs use static buf, it will save ptr here */	

-};

-/* make sure the following struct var had been initilased to 0! */

-static struct _nand_dev nand_part[UFFS_DEVICE_MAX] = {0};

-

-static int uffs_result_to_dfs(int result)

-{

-	int status = -1;

-

-	result = result < 0 ? -result : result;

-	switch (result)

-	{

-	case UENOERR:/** no error */

-		break;

-	case UEACCES:/** Tried to open read-only file for writing, or files sharing mode

-				   does not allow specified operations, or given path is directory */

-		status = -DFS_STATUS_EINVAL;

-		break;/* no suitable */

-	case UEEXIST:   /** _O_CREAT and _O_EXCL flags specified, but filename already exists */

-		status = -DFS_STATUS_EEXIST;

-		break;

-	case UEINVAL:  /** Invalid oflag or pmode argument */

-		status = -DFS_STATUS_EINVAL;

-		break;

-	case UEMFILE: /** No more file handles available(too many open files)  */

-		status = -1;

-		break;

-	case UENOENT: /** file or path not found */

-		status = -DFS_STATUS_ENOENT;

-		break;

-	case UETIME: /** can't set file time */

-		status = -1;

-		break;

-	case UEBADF: /** invalid file handle */

-		status = -DFS_STATUS_EBADF;

-		break;

-	case UENOMEM:/** no enough memory */

-		status = -DFS_STATUS_ENOSPC;

-		break;

-	case UEIOERR: /** I/O error from lower level flash operation */

-		status = -DFS_STATUS_EIO;

-		break;

-	case UENOTDIR: /** Not a directory */

-		status = -DFS_STATUS_ENOTDIR;

-		break;

-	case UEISDIR: /** Is a directory */

-		status = -DFS_STATUS_EISDIR;

-		break;

-	case UEUNKNOWN_ERR:

-	default:

-		status = -1;

-		break; /* unknown error! */

-	}

-

-	return status;

-}

-

-static URET _device_init(uffs_Device *dev)

-{

-	dev->attr->_private = NULL;	// hook nand_chip data structure to attr->_private

-	dev->ops = (struct uffs_FlashOpsSt *)&nand_ops;

-

-	return U_SUCC;

-}

-

-static URET _device_release(uffs_Device *dev)

-{

-	return U_SUCC;

-}

-

-static int init_uffs_fs(

-	struct _nand_dev * nand_part)

-{

-    uffs_MountTable * mtb;

-    struct rt_mtd_nand_device * nand;

-    struct uffs_StorageAttrSt * flash_storage;

-

-    mtb = &nand_part->mount_table;

-    nand = nand_part->dev;

-    flash_storage = &nand_part->storage;

-

-	/* setup nand storage attributes */

-	uffs_setup_storage(flash_storage, nand);

-

-	/* register mount table */

-	if(mtb->dev)

-	{

-		/* set memory allocator for uffs */

-#if CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 0

-		uffs_MemSetupSystemAllocator(&mtb->dev->mem);

-#endif

-		/* setup device init/release entry */

-		mtb->dev->Init = _device_init;

-		mtb->dev->Release = _device_release;

-		mtb->dev->attr = flash_storage;

-

-		uffs_RegisterMountTable(mtb);

-	}

-	/* mount uffs partion on nand device */

-	return uffs_Mount(nand_part->mount_path) == U_SUCC ? 0 : -1;

-}

-

-static int dfs_uffs_mount(

-	struct dfs_filesystem* fs,

-    unsigned long rwflag,

-    const void* data)

-{

-	rt_base_t index;

-	uffs_MountTable * mount_part;

-	struct rt_mtd_nand_device * dev;

-	

-	RT_ASSERT(rt_strlen(fs->path) < (UFFS_MOUNT_PATH_MAX-1));

-	dev = RT_MTD_NAND_DEVICE(fs->dev_id);

-

-	/*1. find a empty entry in partition table */

-	for (index = 0; index < UFFS_DEVICE_MAX ; index ++)

-	{

-		if (nand_part[index].dev == RT_NULL)

-			break;

-	}

-	if (index == UFFS_DEVICE_MAX)

-		return -DFS_STATUS_ENOENT;

-

-	/*2. fill partition structure */

-	nand_part[index].dev = dev;

-

-	/* make a right mount path for uffs, end with '/' */

-	rt_snprintf(nand_part[index].mount_path, UFFS_MOUNT_PATH_MAX, "%s/", fs->path);

-	if (nand_part[index].mount_path[1] == '/')

-		nand_part[index].mount_path[1] = 0;

-

-	mount_part = &(nand_part[index].mount_table);

-	mount_part->mount	= nand_part[index].mount_path;

-	mount_part->dev = &(nand_part[index].uffs_dev);

-	rt_memset(mount_part->dev, 0, sizeof(uffs_Device));//in order to make uffs happy.

-	mount_part->dev->_private = dev;   /* save dev_id into uffs */

-	mount_part->start_block = dev->block_start;

-	mount_part->end_block = dev->block_end;

-	/*3. mount uffs */

-	if (init_uffs_fs(&nand_part[index]) < 0)

-	{

-		return uffs_result_to_dfs(uffs_get_error());

-	}

-	return 0;

-}

-

-static int dfs_uffs_unmount(struct dfs_filesystem* fs)

-{

-	rt_base_t index;

-	int result;

-

-	/* find the device index and then unmount it */

-	for (index = 0; index < UFFS_DEVICE_MAX; index++)

-	{

-		if (nand_part[index].dev == RT_MTD_NAND_DEVICE(fs->dev_id))

-		{

-			nand_part[index].dev = RT_NULL;

-			result = uffs_UnMount(nand_part[index].mount_path);

-			if (result != U_SUCC)

-				break;

-

-			result = uffs_UnRegisterMountTable(& nand_part[index].mount_table);

-			return (result == U_SUCC) ? DFS_STATUS_OK : -1;

-		}

-	}

-	return -DFS_STATUS_ENOENT;

-}

-

-static int dfs_uffs_mkfs(const char* device_name)

-{

-	rt_base_t index;

-	rt_uint32_t block;

-	struct rt_mtd_nand_device * mtd;

-

-	/*1. find the device index */

-	for (index = 0; index < UFFS_DEVICE_MAX; index++)

-	{

-		if (rt_strncmp(nand_part[index].dev->parent.parent.name,

-				       device_name, RT_NAME_MAX) == 0)

-			break;

-	}

-

-	if (index == UFFS_DEVICE_MAX)

-	{

-		/* can't find device driver */

-		rt_kprintf("can not find device driver: %s\n", device_name);

-		return -DFS_STATUS_ENOENT;

-	}

-

-	/*2. then unmount the partition */

-	uffs_Mount(nand_part[index].mount_path);

-	mtd = nand_part[index].dev;

-

-	/*3. erase all blocks on the partition */

-	block = mtd->block_start;

-	for (; block <= mtd->block_end; block++)

-	{

-		rt_mtd_nand_erase_block(mtd, block);

-		if (rt_mtd_nand_check_block(mtd, block) != RT_EOK)

-		{

-			rt_kprintf("found bad block %d\n", block);

-			rt_mtd_nand_mark_badblock(mtd, block);

-		}

-	}

-

-	/*4. remount it */

-	if (init_uffs_fs(&nand_part[index]) < 0)

-	{

-		return uffs_result_to_dfs(uffs_get_error());

-	}

-	return DFS_STATUS_OK;

-}

-

-static int dfs_uffs_statfs(struct dfs_filesystem* fs,

-                    struct statfs *buf)

-{

-	rt_base_t index;

-	struct rt_mtd_nand_device * mtd = RT_MTD_NAND_DEVICE(fs->dev_id);

-

-	RT_ASSERT(mtd != RT_NULL);

-

-	/* find the device index */

-	for (index = 0; index < UFFS_DEVICE_MAX; index++)

-	{

-		if (nand_part[index].dev == (void *)mtd)

-			break;

-	}

-	if (index == UFFS_DEVICE_MAX)

-		return -DFS_STATUS_ENOENT;

-	

-	buf->f_bsize = mtd->page_size;

-	buf->f_blocks = mtd->pages_per_block*

-	                (mtd->block_end - mtd->block_start + 1);

-	buf->f_bfree = uffs_GetDeviceFree(&nand_part[index].uffs_dev) / mtd->page_size;

-	

-	return 0;

-}

-

-static int dfs_uffs_open(struct dfs_fd* file)

-{

-	int fd;

-	int oflag, mode;

-	char * file_path;

-

-	oflag = file->flags;

-	if (oflag & DFS_O_DIRECTORY)   /* operations about dir */

-	{

-		uffs_DIR * dir;

-

-		if (oflag & DFS_O_CREAT)   /* create a dir*/

-		{

-			if (uffs_mkdir(file->path) < 0)

-				return uffs_result_to_dfs(uffs_get_error());

-		}

-		/* open dir */

-		file_path = rt_malloc(FILE_PATH_MAX);

-		if(file_path == RT_NULL)

-			return -DFS_STATUS_ENOMEM;			

-

-		if (file->path[0] == '/' && !(file->path[1] == 0))

-			rt_snprintf(file_path, FILE_PATH_MAX, "%s/", file->path);

-		else

-		{

-			file_path[0] = '/';

-			file_path[1] = 0;

-		}

-

-		dir = uffs_opendir(file_path);

-

-		if (dir == RT_NULL)

-		{

-			rt_free(file_path);			

-			return uffs_result_to_dfs(uffs_get_error());

-		}

-		/* save this pointer,will used by  dfs_uffs_getdents*/

-		file->data = dir;

-		rt_free(file_path);

-		return DFS_STATUS_OK;

-	}

-	/* regular file operations */

-	/* int uffs_open(const char *name, int oflag, ...); what is this?

-	 * uffs_open can open dir!!  **/

-	mode = 0;

-	if (oflag & DFS_O_RDONLY) mode |= UO_RDONLY;

-	if (oflag & DFS_O_WRONLY) mode |= UO_WRONLY;

-	if (oflag & DFS_O_RDWR)   mode |= UO_RDWR;

-	/* Opens the file, if it is existing. If not, a new file is created. */

-	if (oflag & DFS_O_CREAT) mode |= UO_CREATE;

-	/* Creates a new file. If the file is existing, it is truncated and overwritten. */

-	if (oflag & DFS_O_TRUNC) mode |= UO_TRUNC;

-	/* Creates a new file. The function fails if the file is already existing. */

-	if (oflag & DFS_O_EXCL) mode |= UO_EXCL;

-

-	fd = uffs_open(file->path, mode);

-	if (fd < 0)

-	{

-		return uffs_result_to_dfs(uffs_get_error());

-	}

-

-	/* save this pointer, it will be used when calling read()��write(),

-	 * flush(), seek(), and will be free when calling close()*/

-

-	file->data = (void *)fd;

-	file->pos  = uffs_seek(fd, 0, USEEK_CUR);

-	file->size = uffs_seek(fd, 0, USEEK_END);

-	uffs_seek(fd, file->pos, USEEK_SET);

-

-	if (oflag & DFS_O_APPEND)

-	{

-		file->pos = uffs_seek(fd, 0, USEEK_END);

-	}

-	return 0;

-}

-

-static int dfs_uffs_close(struct dfs_fd* file)

-{

-	int oflag;

-	int fd;

-

-	oflag = file->flags;

-	if (oflag & DFS_O_DIRECTORY)

-	{

-		/* operations about dir */

-		if (uffs_closedir((uffs_DIR *)(file->data)) < 0)

-			return uffs_result_to_dfs(uffs_get_error());

-

-		return 0;

-	}

-	/* regular file operations */

-	fd = (int)(file->data);

-

-	if (uffs_close(fd) == 0)

-		return 0;

-

-	return uffs_result_to_dfs(uffs_get_error());

-}

-

-static int dfs_uffs_ioctl(struct dfs_fd * file, int cmd, void* args)

-{

-	return -DFS_STATUS_ENOSYS;

-}

-

-static int dfs_uffs_read(struct dfs_fd * file, void* buf, rt_size_t len)

-{

-	int fd;

-	int char_read;

-

-	fd = (int)(file->data);

-	char_read = uffs_read(fd, buf, len);

-	if (char_read < 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	/* update position */

-	file->pos = uffs_seek(fd, 0, USEEK_CUR);

-	return char_read;

-}

-

-static int dfs_uffs_write(struct dfs_fd* file,

-                   const void* buf,

-                   rt_size_t len)

-{

-	int fd;

-	int char_write;

-

-	fd = (int)(file->data);

-

-	char_write = uffs_write(fd, buf, len);

-	if (char_write < 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	/* update position */

-	file->pos = uffs_seek(fd, 0, USEEK_CUR);

-	return char_write;

-}

-

-static int dfs_uffs_flush(struct dfs_fd* file)

-{

-	int fd;

-	int result;

-

-	fd = (int)(file->data);

-

-	result = uffs_flush(fd);

-	if (result < 0 )

-		return uffs_result_to_dfs(uffs_get_error());

-	return 0;

-}

-

-int uffs_seekdir(uffs_DIR *dir, long offset)

-{

-	int i = 0;

-

-	while(i < offset)

-	{	

-		if (uffs_readdir(dir) == RT_NULL)

-			return -1;

-		i++;

-	} 

-	return 0;

-}

-

-

-static int dfs_uffs_seek(struct dfs_fd* file,

-                  rt_off_t offset)

-{

-	int result;

-

-	/* set offset as current offset */

-	if (file->type == FT_DIRECTORY)

-	{

-		uffs_rewinddir((uffs_DIR *)(file->data));

-		result = uffs_seekdir((uffs_DIR *)(file->data), offset/sizeof(struct dirent));

-		if (result >= 0)

-		{

-			file->pos = offset; 

-			return offset;

-		}

-	}

-	else if (file->type == FT_REGULAR)

-	{

-		result = uffs_seek((int)(file->data), offset, USEEK_SET);

-		if (result >= 0)	

-			return offset;

-	}

-

-	return uffs_result_to_dfs(uffs_get_error());

-}

-

-/* return the size of struct dirent*/

-static int dfs_uffs_getdents(

-    struct dfs_fd* file,

-    struct dirent* dirp,

-    rt_uint32_t count)

-{

-	rt_uint32_t index;

-	char * file_path;

-	struct dirent* d;

-	uffs_DIR* dir;

-	struct uffs_dirent * uffs_d;

-	

-	dir = (uffs_DIR*)(file->data);

-	RT_ASSERT(dir != RT_NULL);

-	

-	/* round count, count is always 1 */

-	count = (count / sizeof(struct dirent)) * sizeof(struct dirent);

-	if (count == 0) return -DFS_STATUS_EINVAL;

-

-	/* allocate file name */

-	file_path = rt_malloc(FILE_PATH_MAX);

-	if (file_path == RT_NULL)

-		return -DFS_STATUS_ENOMEM;

-		

-	index = 0;

-	/* usually, the while loop should only be looped only once! */

-	while (1)

-	{

-		struct uffs_stat s;

-		

-		d = dirp + index;

-

-		uffs_d = uffs_readdir(dir);

-		if (uffs_d == RT_NULL)

-		{

-			rt_free(file_path);

-			return (uffs_result_to_dfs(uffs_get_error()));

-		}

-

-		if (file->path[0] == '/' && !(file->path[1] == 0))

-			rt_snprintf(file_path, FILE_PATH_MAX, "%s/%s", file->path, uffs_d->d_name);

-		else

-			rt_strncpy(file_path, uffs_d->d_name, FILE_PATH_MAX);

-

-		uffs_stat(file_path, &s); 

-		switch(s.st_mode & US_IFMT)   /* file type mark */

-		{

-		case US_IFREG: /* directory */

-			d->d_type = DFS_DT_REG;

-			break;

-		case US_IFDIR: /* regular file */

-			d->d_type = DFS_DT_DIR;

-			break;

-		case US_IFLNK: /* symbolic link */

-		case US_IREAD: /* read permission */

-		case US_IWRITE:/* write permission */

-		default:

-			d->d_type = DFS_DT_UNKNOWN;

-			break;

-		}

-

-		/* write the rest args of struct dirent* dirp  */

-		d->d_namlen = rt_strlen(uffs_d->d_name);

-		d->d_reclen = (rt_uint16_t)sizeof(struct dirent);

-		rt_strncpy(d->d_name, uffs_d->d_name, rt_strlen(uffs_d->d_name) + 1);

-

-		index ++;

-		if (index * sizeof(struct dirent) >= count)

-			break;

-	}

-	

-	/* free file name buf */

-	rt_free(file_path);

-	

-	if (index == 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	file->pos += index * sizeof(struct dirent);

-

-	return index * sizeof(struct dirent);

-}

-

-static int dfs_uffs_unlink(struct dfs_filesystem* fs, const char* path)

-{

-	int result;

-	struct uffs_stat s;

-

-	/* judge file type, dir is to be delete by uffs_rmdir, others by uffs_remove */

-	if (uffs_lstat(path, &s) < 0)

-	{

-		return uffs_result_to_dfs(uffs_get_error());

-	}

-

-	switch(s.st_mode & US_IFMT)

-	{

-	case US_IFREG:

-		result = uffs_remove(path);

-		break;

-	case US_IFDIR:

-		result = uffs_rmdir(path);

-		break;

-	default:

-		/* unknown file type */

-		return -1;

-	}

-	if (result < 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	return 0;

-}

-

-static int dfs_uffs_rename(

-    struct dfs_filesystem* fs,

-    const char* oldpath,

-    const char* newpath)

-{

-	int result;

-	

-	result = uffs_rename(oldpath, newpath);

-	if (result < 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	return 0;

-}

-

-static int dfs_uffs_stat(struct dfs_filesystem* fs, const char *path, struct stat *st)

-{

-	int result;

-	struct uffs_stat s;

-	struct rt_mtd_nand_device * mtd;

-

-	result = uffs_stat(path, &s);

-	if (result < 0)

-		return uffs_result_to_dfs(uffs_get_error());

-

-	/* convert uffs stat to dfs stat structure */

-	/* FIXME, these field may not be the same */

-	st->st_dev  = 0;

-	st->st_mode = s.st_mode;

-	st->st_size = s.st_size;

-	st->st_mtime = s.st_mtime;

-

-	mtd = RT_MTD_NAND_DEVICE(fs->dev_id);

-	st->st_blksize = mtd->page_size;

-

-	return 0;

-}

-

-static const struct dfs_filesystem_operation dfs_uffs_ops =

-{

-	"uffs", /* file system type: uffs */

-#if RTTHREAD_VERSION >= 10100

-	DFS_FS_FLAG_FULLPATH,

-#else

-#error "uffs can only work with rtthread whose version should >= 1.01\n"

-#endif

-	dfs_uffs_mount,

-	dfs_uffs_unmount,

-	dfs_uffs_mkfs,

-	dfs_uffs_statfs,

-

-	dfs_uffs_open,

-	dfs_uffs_close,

-	dfs_uffs_ioctl,

-	dfs_uffs_read,

-	dfs_uffs_write,

-	dfs_uffs_flush,

-	dfs_uffs_seek,

-	dfs_uffs_getdents,

-	dfs_uffs_unlink,

-	dfs_uffs_stat,

-	dfs_uffs_rename,

-};

-

-int dfs_uffs_init(void)

-{

-	/* register uffs file system */

-	dfs_register(&dfs_uffs_ops);

-

-	if (uffs_InitObjectBuf() == U_SUCC)

-	{

-		if (uffs_DirEntryBufInit() == U_SUCC)

-		{

-			uffs_InitGlobalFsLock();

-			return RT_EOK;

-		}

-	}

-	return -RT_ERROR;

-}

+/*
+ * File      : rtthread.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006-2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-10-22     prife        the first version
+ * 2012-03-28     prife        use mtd device interface
+ * 2012-04-05     prife        update uffs with official repo and use uffs_UnMount/Mount
+*/
+#include <rtthread.h>
+
+#include <dfs_fs.h>
+#include <dfs_def.h>
+#include <rtdevice.h>
+#include "dfs_uffs.h"
+
+#include "uffs/uffs_fd.h" /* posix file api is here */
+#include "uffs/uffs_mtb.h"
+#include "uffs/uffs_mem.h"
+#include "uffs/uffs_utils.h"
+
+/*
+ * RT-Thread DFS Interface for uffs
+ */
+#define UFFS_DEVICE_MAX	        2	 /* the max partions on a nand deivce*/
+#define UFFS_MOUNT_PATH_MAX     128	 /* the mount point max length */
+#define FILE_PATH_MAX	        256	 /* the longest file path */
+
+struct _nand_dev
+{
+	struct rt_mtd_nand_device * dev;
+	struct uffs_StorageAttrSt storage;
+	uffs_Device uffs_dev;
+	uffs_MountTable mount_table;
+	char mount_path[UFFS_MOUNT_PATH_MAX];
+	void * data;  /* when uffs use static buf, it will save ptr here */	
+};
+/* make sure the following struct var had been initilased to 0! */
+static struct _nand_dev nand_part[UFFS_DEVICE_MAX] = {0};
+
+static int uffs_result_to_dfs(int result)
+{
+	int status = -1;
+
+	result = result < 0 ? -result : result;
+	switch (result)
+	{
+	case UENOERR:/** no error */
+		break;
+	case UEACCES:/** Tried to open read-only file for writing, or files sharing mode
+				   does not allow specified operations, or given path is directory */
+		status = -DFS_STATUS_EINVAL;
+		break;/* no suitable */
+	case UEEXIST:   /** _O_CREAT and _O_EXCL flags specified, but filename already exists */
+		status = -DFS_STATUS_EEXIST;
+		break;
+	case UEINVAL:  /** Invalid oflag or pmode argument */
+		status = -DFS_STATUS_EINVAL;
+		break;
+	case UEMFILE: /** No more file handles available(too many open files)  */
+		status = -1;
+		break;
+	case UENOENT: /** file or path not found */
+		status = -DFS_STATUS_ENOENT;
+		break;
+	case UETIME: /** can't set file time */
+		status = -1;
+		break;
+	case UEBADF: /** invalid file handle */
+		status = -DFS_STATUS_EBADF;
+		break;
+	case UENOMEM:/** no enough memory */
+		status = -DFS_STATUS_ENOSPC;
+		break;
+	case UEIOERR: /** I/O error from lower level flash operation */
+		status = -DFS_STATUS_EIO;
+		break;
+	case UENOTDIR: /** Not a directory */
+		status = -DFS_STATUS_ENOTDIR;
+		break;
+	case UEISDIR: /** Is a directory */
+		status = -DFS_STATUS_EISDIR;
+		break;
+	case UEUNKNOWN_ERR:
+	default:
+		status = -1;
+		break; /* unknown error! */
+	}
+
+	return status;
+}
+
+static URET _device_init(uffs_Device *dev)
+{
+	dev->attr->_private = NULL;	// hook nand_chip data structure to attr->_private
+	dev->ops = (struct uffs_FlashOpsSt *)&nand_ops;
+
+	return U_SUCC;
+}
+
+static URET _device_release(uffs_Device *dev)
+{
+	return U_SUCC;
+}
+
+static int init_uffs_fs(
+	struct _nand_dev * nand_part)
+{
+    uffs_MountTable * mtb;
+    struct rt_mtd_nand_device * nand;
+    struct uffs_StorageAttrSt * flash_storage;
+
+    mtb = &nand_part->mount_table;
+    nand = nand_part->dev;
+    flash_storage = &nand_part->storage;
+
+	/* setup nand storage attributes */
+	uffs_setup_storage(flash_storage, nand);
+
+	/* register mount table */
+	if(mtb->dev)
+	{
+		/* set memory allocator for uffs */
+#if CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 0
+		uffs_MemSetupSystemAllocator(&mtb->dev->mem);
+#endif
+		/* setup device init/release entry */
+		mtb->dev->Init = _device_init;
+		mtb->dev->Release = _device_release;
+		mtb->dev->attr = flash_storage;
+
+		uffs_RegisterMountTable(mtb);
+	}
+	/* mount uffs partion on nand device */
+	return uffs_Mount(nand_part->mount_path) == U_SUCC ? 0 : -1;
+}
+
+static int dfs_uffs_mount(
+	struct dfs_filesystem* fs,
+    unsigned long rwflag,
+    const void* data)
+{
+	rt_base_t index;
+	uffs_MountTable * mount_part;
+	struct rt_mtd_nand_device * dev;
+	
+	RT_ASSERT(rt_strlen(fs->path) < (UFFS_MOUNT_PATH_MAX-1));
+	dev = RT_MTD_NAND_DEVICE(fs->dev_id);
+
+	/*1. find a empty entry in partition table */
+	for (index = 0; index < UFFS_DEVICE_MAX ; index ++)
+	{
+		if (nand_part[index].dev == RT_NULL)
+			break;
+	}
+	if (index == UFFS_DEVICE_MAX)
+		return -DFS_STATUS_ENOENT;
+
+	/*2. fill partition structure */
+	nand_part[index].dev = dev;
+
+	/* make a right mount path for uffs, end with '/' */
+	rt_snprintf(nand_part[index].mount_path, UFFS_MOUNT_PATH_MAX, "%s/", fs->path);
+	if (nand_part[index].mount_path[1] == '/')
+		nand_part[index].mount_path[1] = 0;
+
+	mount_part = &(nand_part[index].mount_table);
+	mount_part->mount	= nand_part[index].mount_path;
+	mount_part->dev = &(nand_part[index].uffs_dev);
+	rt_memset(mount_part->dev, 0, sizeof(uffs_Device));//in order to make uffs happy.
+	mount_part->dev->_private = dev;   /* save dev_id into uffs */
+	mount_part->start_block = dev->block_start;
+	mount_part->end_block = dev->block_end;
+	/*3. mount uffs */
+	if (init_uffs_fs(&nand_part[index]) < 0)
+	{
+		return uffs_result_to_dfs(uffs_get_error());
+	}
+	return 0;
+}
+
+static int dfs_uffs_unmount(struct dfs_filesystem* fs)
+{
+	rt_base_t index;
+	int result;
+
+	/* find the device index and then unmount it */
+	for (index = 0; index < UFFS_DEVICE_MAX; index++)
+	{
+		if (nand_part[index].dev == RT_MTD_NAND_DEVICE(fs->dev_id))
+		{
+			nand_part[index].dev = RT_NULL;
+			result = uffs_UnMount(nand_part[index].mount_path);
+			if (result != U_SUCC)
+				break;
+
+			result = uffs_UnRegisterMountTable(& nand_part[index].mount_table);
+			return (result == U_SUCC) ? DFS_STATUS_OK : -1;
+		}
+	}
+	return -DFS_STATUS_ENOENT;
+}
+
+static int dfs_uffs_mkfs(const char* device_name)
+{
+	rt_base_t index;
+	rt_uint32_t block;
+	struct rt_mtd_nand_device * mtd;
+
+	/*1. find the device index */
+	for (index = 0; index < UFFS_DEVICE_MAX; index++)
+	{
+		if (rt_strncmp(nand_part[index].dev->parent.parent.name,
+				       device_name, RT_NAME_MAX) == 0)
+			break;
+	}
+
+	if (index == UFFS_DEVICE_MAX)
+	{
+		/* can't find device driver */
+		rt_kprintf("can not find device driver: %s\n", device_name);
+		return -DFS_STATUS_ENOENT;
+	}
+
+	/*2. then unmount the partition */
+	uffs_Mount(nand_part[index].mount_path);
+	mtd = nand_part[index].dev;
+
+	/*3. erase all blocks on the partition */
+	block = mtd->block_start;
+	for (; block <= mtd->block_end; block++)
+	{
+		rt_mtd_nand_erase_block(mtd, block);
+		if (rt_mtd_nand_check_block(mtd, block) != RT_EOK)
+		{
+			rt_kprintf("found bad block %d\n", block);
+			rt_mtd_nand_mark_badblock(mtd, block);
+		}
+	}
+
+	/*4. remount it */
+	if (init_uffs_fs(&nand_part[index]) < 0)
+	{
+		return uffs_result_to_dfs(uffs_get_error());
+	}
+	return DFS_STATUS_OK;
+}
+
+static int dfs_uffs_statfs(struct dfs_filesystem* fs,
+                    struct statfs *buf)
+{
+	rt_base_t index;
+	struct rt_mtd_nand_device * mtd = RT_MTD_NAND_DEVICE(fs->dev_id);
+
+	RT_ASSERT(mtd != RT_NULL);
+
+	/* find the device index */
+	for (index = 0; index < UFFS_DEVICE_MAX; index++)
+	{
+		if (nand_part[index].dev == (void *)mtd)
+			break;
+	}
+	if (index == UFFS_DEVICE_MAX)
+		return -DFS_STATUS_ENOENT;
+	
+	buf->f_bsize = mtd->page_size;
+	buf->f_blocks = mtd->pages_per_block*
+	                (mtd->block_end - mtd->block_start + 1);
+	buf->f_bfree = uffs_GetDeviceFree(&nand_part[index].uffs_dev) / mtd->page_size;
+	
+	return 0;
+}
+
+static int dfs_uffs_open(struct dfs_fd* file)
+{
+	int fd;
+	int oflag, mode;
+	char * file_path;
+
+	oflag = file->flags;
+	if (oflag & DFS_O_DIRECTORY)   /* operations about dir */
+	{
+		uffs_DIR * dir;
+
+		if (oflag & DFS_O_CREAT)   /* create a dir*/
+		{
+			if (uffs_mkdir(file->path) < 0)
+				return uffs_result_to_dfs(uffs_get_error());
+		}
+		/* open dir */
+		file_path = rt_malloc(FILE_PATH_MAX);
+		if(file_path == RT_NULL)
+			return -DFS_STATUS_ENOMEM;			
+
+		if (file->path[0] == '/' && !(file->path[1] == 0))
+			rt_snprintf(file_path, FILE_PATH_MAX, "%s/", file->path);
+		else
+		{
+			file_path[0] = '/';
+			file_path[1] = 0;
+		}
+
+		dir = uffs_opendir(file_path);
+
+		if (dir == RT_NULL)
+		{
+			rt_free(file_path);			
+			return uffs_result_to_dfs(uffs_get_error());
+		}
+		/* save this pointer,will used by  dfs_uffs_getdents*/
+		file->data = dir;
+		rt_free(file_path);
+		return DFS_STATUS_OK;
+	}
+	/* regular file operations */
+	/* int uffs_open(const char *name, int oflag, ...); what is this?
+	 * uffs_open can open dir!!  **/
+	mode = 0;
+	if (oflag & DFS_O_RDONLY) mode |= UO_RDONLY;
+	if (oflag & DFS_O_WRONLY) mode |= UO_WRONLY;
+	if (oflag & DFS_O_RDWR)   mode |= UO_RDWR;
+	/* Opens the file, if it is existing. If not, a new file is created. */
+	if (oflag & DFS_O_CREAT) mode |= UO_CREATE;
+	/* Creates a new file. If the file is existing, it is truncated and overwritten. */
+	if (oflag & DFS_O_TRUNC) mode |= UO_TRUNC;
+	/* Creates a new file. The function fails if the file is already existing. */
+	if (oflag & DFS_O_EXCL) mode |= UO_EXCL;
+
+	fd = uffs_open(file->path, mode);
+	if (fd < 0)
+	{
+		return uffs_result_to_dfs(uffs_get_error());
+	}
+
+	/* save this pointer, it will be used when calling read()��write(),
+	 * flush(), seek(), and will be free when calling close()*/
+
+	file->data = (void *)fd;
+	file->pos  = uffs_seek(fd, 0, USEEK_CUR);
+	file->size = uffs_seek(fd, 0, USEEK_END);
+	uffs_seek(fd, file->pos, USEEK_SET);
+
+	if (oflag & DFS_O_APPEND)
+	{
+		file->pos = uffs_seek(fd, 0, USEEK_END);
+	}
+	return 0;
+}
+
+static int dfs_uffs_close(struct dfs_fd* file)
+{
+	int oflag;
+	int fd;
+
+	oflag = file->flags;
+	if (oflag & DFS_O_DIRECTORY)
+	{
+		/* operations about dir */
+		if (uffs_closedir((uffs_DIR *)(file->data)) < 0)
+			return uffs_result_to_dfs(uffs_get_error());
+
+		return 0;
+	}
+	/* regular file operations */
+	fd = (int)(file->data);
+
+	if (uffs_close(fd) == 0)
+		return 0;
+
+	return uffs_result_to_dfs(uffs_get_error());
+}
+
+static int dfs_uffs_ioctl(struct dfs_fd * file, int cmd, void* args)
+{
+	return -DFS_STATUS_ENOSYS;
+}
+
+static int dfs_uffs_read(struct dfs_fd * file, void* buf, rt_size_t len)
+{
+	int fd;
+	int char_read;
+
+	fd = (int)(file->data);
+	char_read = uffs_read(fd, buf, len);
+	if (char_read < 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	/* update position */
+	file->pos = uffs_seek(fd, 0, USEEK_CUR);
+	return char_read;
+}
+
+static int dfs_uffs_write(struct dfs_fd* file,
+                   const void* buf,
+                   rt_size_t len)
+{
+	int fd;
+	int char_write;
+
+	fd = (int)(file->data);
+
+	char_write = uffs_write(fd, buf, len);
+	if (char_write < 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	/* update position */
+	file->pos = uffs_seek(fd, 0, USEEK_CUR);
+	return char_write;
+}
+
+static int dfs_uffs_flush(struct dfs_fd* file)
+{
+	int fd;
+	int result;
+
+	fd = (int)(file->data);
+
+	result = uffs_flush(fd);
+	if (result < 0 )
+		return uffs_result_to_dfs(uffs_get_error());
+	return 0;
+}
+
+int uffs_seekdir(uffs_DIR *dir, long offset)
+{
+	int i = 0;
+
+	while(i < offset)
+	{	
+		if (uffs_readdir(dir) == RT_NULL)
+			return -1;
+		i++;
+	} 
+	return 0;
+}
+
+
+static int dfs_uffs_seek(struct dfs_fd* file,
+                  rt_off_t offset)
+{
+	int result;
+
+	/* set offset as current offset */
+	if (file->type == FT_DIRECTORY)
+	{
+		uffs_rewinddir((uffs_DIR *)(file->data));
+		result = uffs_seekdir((uffs_DIR *)(file->data), offset/sizeof(struct dirent));
+		if (result >= 0)
+		{
+			file->pos = offset; 
+			return offset;
+		}
+	}
+	else if (file->type == FT_REGULAR)
+	{
+		result = uffs_seek((int)(file->data), offset, USEEK_SET);
+		if (result >= 0)	
+			return offset;
+	}
+
+	return uffs_result_to_dfs(uffs_get_error());
+}
+
+/* return the size of struct dirent*/
+static int dfs_uffs_getdents(
+    struct dfs_fd* file,
+    struct dirent* dirp,
+    rt_uint32_t count)
+{
+	rt_uint32_t index;
+	char * file_path;
+	struct dirent* d;
+	uffs_DIR* dir;
+	struct uffs_dirent * uffs_d;
+	
+	dir = (uffs_DIR*)(file->data);
+	RT_ASSERT(dir != RT_NULL);
+	
+	/* round count, count is always 1 */
+	count = (count / sizeof(struct dirent)) * sizeof(struct dirent);
+	if (count == 0) return -DFS_STATUS_EINVAL;
+
+	/* allocate file name */
+	file_path = rt_malloc(FILE_PATH_MAX);
+	if (file_path == RT_NULL)
+		return -DFS_STATUS_ENOMEM;
+		
+	index = 0;
+	/* usually, the while loop should only be looped only once! */
+	while (1)
+	{
+		struct uffs_stat s;
+		
+		d = dirp + index;
+
+		uffs_d = uffs_readdir(dir);
+		if (uffs_d == RT_NULL)
+		{
+			rt_free(file_path);
+			return (uffs_result_to_dfs(uffs_get_error()));
+		}
+
+		if (file->path[0] == '/' && !(file->path[1] == 0))
+			rt_snprintf(file_path, FILE_PATH_MAX, "%s/%s", file->path, uffs_d->d_name);
+		else
+			rt_strncpy(file_path, uffs_d->d_name, FILE_PATH_MAX);
+
+		uffs_stat(file_path, &s); 
+		switch(s.st_mode & US_IFMT)   /* file type mark */
+		{
+		case US_IFREG: /* directory */
+			d->d_type = DFS_DT_REG;
+			break;
+		case US_IFDIR: /* regular file */
+			d->d_type = DFS_DT_DIR;
+			break;
+		case US_IFLNK: /* symbolic link */
+		case US_IREAD: /* read permission */
+		case US_IWRITE:/* write permission */
+		default:
+			d->d_type = DFS_DT_UNKNOWN;
+			break;
+		}
+
+		/* write the rest args of struct dirent* dirp  */
+		d->d_namlen = rt_strlen(uffs_d->d_name);
+		d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
+		rt_strncpy(d->d_name, uffs_d->d_name, rt_strlen(uffs_d->d_name) + 1);
+
+		index ++;
+		if (index * sizeof(struct dirent) >= count)
+			break;
+	}
+	
+	/* free file name buf */
+	rt_free(file_path);
+	
+	if (index == 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	file->pos += index * sizeof(struct dirent);
+
+	return index * sizeof(struct dirent);
+}
+
+static int dfs_uffs_unlink(struct dfs_filesystem* fs, const char* path)
+{
+	int result;
+	struct uffs_stat s;
+
+	/* judge file type, dir is to be delete by uffs_rmdir, others by uffs_remove */
+	if (uffs_lstat(path, &s) < 0)
+	{
+		return uffs_result_to_dfs(uffs_get_error());
+	}
+
+	switch(s.st_mode & US_IFMT)
+	{
+	case US_IFREG:
+		result = uffs_remove(path);
+		break;
+	case US_IFDIR:
+		result = uffs_rmdir(path);
+		break;
+	default:
+		/* unknown file type */
+		return -1;
+	}
+	if (result < 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	return 0;
+}
+
+static int dfs_uffs_rename(
+    struct dfs_filesystem* fs,
+    const char* oldpath,
+    const char* newpath)
+{
+	int result;
+	
+	result = uffs_rename(oldpath, newpath);
+	if (result < 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	return 0;
+}
+
+static int dfs_uffs_stat(struct dfs_filesystem* fs, const char *path, struct stat *st)
+{
+	int result;
+	struct uffs_stat s;
+	struct rt_mtd_nand_device * mtd;
+
+	result = uffs_stat(path, &s);
+	if (result < 0)
+		return uffs_result_to_dfs(uffs_get_error());
+
+	/* convert uffs stat to dfs stat structure */
+	/* FIXME, these field may not be the same */
+	st->st_dev  = 0;
+	st->st_mode = s.st_mode;
+	st->st_size = s.st_size;
+	st->st_mtime = s.st_mtime;
+
+	mtd = RT_MTD_NAND_DEVICE(fs->dev_id);
+	st->st_blksize = mtd->page_size;
+
+	return 0;
+}
+
+static const struct dfs_filesystem_operation dfs_uffs_ops =
+{
+	"uffs", /* file system type: uffs */
+#if RTTHREAD_VERSION >= 10100
+	DFS_FS_FLAG_FULLPATH,
+#else
+#error "uffs can only work with rtthread whose version should >= 1.01\n"
+#endif
+	dfs_uffs_mount,
+	dfs_uffs_unmount,
+	dfs_uffs_mkfs,
+	dfs_uffs_statfs,
+
+	dfs_uffs_open,
+	dfs_uffs_close,
+	dfs_uffs_ioctl,
+	dfs_uffs_read,
+	dfs_uffs_write,
+	dfs_uffs_flush,
+	dfs_uffs_seek,
+	dfs_uffs_getdents,
+	dfs_uffs_unlink,
+	dfs_uffs_stat,
+	dfs_uffs_rename,
+};
+
+int dfs_uffs_init(void)
+{
+	/* register uffs file system */
+	dfs_register(&dfs_uffs_ops);
+
+	if (uffs_InitObjectBuf() == U_SUCC)
+	{
+		if (uffs_DirEntryBufInit() == U_SUCC)
+		{
+			uffs_InitGlobalFsLock();
+			return RT_EOK;
+		}
+	}
+	return -RT_ERROR;
+}