diff --git a/bsp/simulator/drivers/dfs_win32.c b/bsp/simulator/drivers/dfs_win32.c
index 6d144fe6e560ace599edd21ce4c9f3bd6d5714c6..ebf1d741c9723129cbd5fd5421390673f8027b42 100644
--- a/bsp/simulator/drivers/dfs_win32.c
+++ b/bsp/simulator/drivers/dfs_win32.c
@@ -144,7 +144,7 @@ char * dfs_win32_dirdup(char * path)
     return file_path;
 }
 
-static int dfs_win32_open(struct dfs_fd *file)
+static int dfs_win32_open(struct dfs_file *file)
 {
     int fd;
     uint32_t oflag, mode;
@@ -239,7 +239,7 @@ __err:
     return win32_result_to_dfs(res);
 }
 
-static int dfs_win32_close(struct dfs_fd *file)
+static int dfs_win32_close(struct dfs_file *file)
 {
     if (file->flags & O_DIRECTORY)
     {
@@ -260,12 +260,12 @@ static int dfs_win32_close(struct dfs_fd *file)
     return win32_result_to_dfs(GetLastError());
 }
 
-static int dfs_win32_ioctl(struct dfs_fd *file, int cmd, void *args)
+static int dfs_win32_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -ENOSYS;
 }
 
-static int dfs_win32_read(struct dfs_fd *file, void *buf, size_t len)
+static int dfs_win32_read(struct dfs_file *file, void *buf, size_t len)
 {
     int fd;
     int char_read;
@@ -280,7 +280,7 @@ static int dfs_win32_read(struct dfs_fd *file, void *buf, size_t len)
     return char_read;
 }
 
-static int dfs_win32_write(struct dfs_fd *file, const void *buf, size_t len)
+static int dfs_win32_write(struct dfs_file *file, const void *buf, size_t len)
 {
     int fd;
     int char_write;
@@ -296,12 +296,12 @@ static int dfs_win32_write(struct dfs_fd *file, const void *buf, size_t len)
     return char_write;
 }
 
-static int dfs_win32_flush(struct dfs_fd *file)
+static int dfs_win32_flush(struct dfs_file *file)
 {
     return 0;
 }
 
-static int dfs_win32_seek(struct dfs_fd *file,
+static int dfs_win32_seek(struct dfs_file *file,
                           rt_off_t offset)
 {
     int result;
@@ -325,7 +325,7 @@ static int dfs_win32_seek(struct dfs_fd *file,
 }
 
 /* return the size of struct dirent*/
-static int dfs_win32_getdents(struct dfs_fd *file, struct dirent *dirp, rt_uint32_t count)
+static int dfs_win32_getdents(struct dfs_file *file, struct dirent *dirp, rt_uint32_t count)
 {
     WINDIR *wdirp;
     struct dirent *d = dirp;
diff --git a/bsp/simulator/drivers/winsock/rtt_winsock.h b/bsp/simulator/drivers/winsock/rtt_winsock.h
index 63c8fae6005398d32ed44d19fc9f5ed154370e1c..d0ec540c2cd276779583f58602e87b2c77f853e5 100644
--- a/bsp/simulator/drivers/winsock/rtt_winsock.h
+++ b/bsp/simulator/drivers/winsock/rtt_winsock.h
@@ -107,7 +107,7 @@ int win_getsockname(int s, struct sal_type_sockaddr* name, sal_type_socklen_t* n
 int win_ioctlsocket(int s, long cmd, void* arg);
 
 #ifdef SAL_USING_POSIX
-int inet_poll(struct dfs_fd* file, struct rt_pollreq* req);
+int inet_poll(struct dfs_file* file, struct rt_pollreq* req);
 #endif /* SAL_USING_POSIX */
 
 
diff --git a/bsp/simulator/drivers/winsock/sal_winsock.c b/bsp/simulator/drivers/winsock/sal_winsock.c
index 6a43670f5d0eb15f8fe0dbe890ac300f45a4ffe2..715ac4e250c6329c2a53299c916389209dea4dbd 100644
--- a/bsp/simulator/drivers/winsock/sal_winsock.c
+++ b/bsp/simulator/drivers/winsock/sal_winsock.c
@@ -167,9 +167,10 @@ int win_ioctlsocket(int s, long cmd, void *arg)
 
 #ifdef SAL_USING_POSIX
 /* use windows poll, but not wait */
-int inet_poll(struct dfs_fd* file, struct rt_pollreq* req)
+int inet_poll(struct dfs_file* file, struct rt_pollreq* req)
 {
-    /*WSAPOLLFD winpoll;
+    /*
+    WSAPOLLFD winpoll;
     struct sal_socket* sal_sock;
     int mask = 0;
     int poll_event = 0;
@@ -189,7 +190,10 @@ int inet_poll(struct dfs_fd* file, struct rt_pollreq* req)
     if (mask == 0)
         return 0;
 
-    return winpoll.revents;*/
+    return winpoll.revents;
+    */
+
+   return 0;
 }
 #endif /* SAL_USING_POSIX */
 
diff --git a/components/dfs/dfs_v1/filesystems/cromfs/dfs_cromfs.c b/components/dfs/dfs_v1/filesystems/cromfs/dfs_cromfs.c
index f2a8424bb414c0e1d14e3c06507bf563ca603488..fee8b8dbd15349e96e246e43f1b6262e00003efe 100644
--- a/components/dfs/dfs_v1/filesystems/cromfs/dfs_cromfs.c
+++ b/components/dfs/dfs_v1/filesystems/cromfs/dfs_cromfs.c
@@ -564,7 +564,7 @@ static int dfs_cromfs_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-static int dfs_cromfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+static int dfs_cromfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -EIO;
 }
@@ -718,7 +718,7 @@ end:
     return ret;
 }
 
-static int dfs_cromfs_read(struct dfs_fd *file, void *buf, size_t count)
+static int dfs_cromfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_err_t result = RT_EOK;
     struct dfs_filesystem *fs = NULL;
@@ -788,7 +788,7 @@ static int dfs_cromfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-static int dfs_cromfs_lseek(struct dfs_fd *file, off_t offset)
+static int dfs_cromfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= file->vnode->size)
     {
@@ -890,7 +890,7 @@ static void deref_file_info(cromfs_info *ci, uint32_t partition_pos)
     }
 }
 
-static int dfs_cromfs_close(struct dfs_fd *file)
+static int dfs_cromfs_close(struct dfs_file *file)
 {
     file_info *fi = NULL;
     struct dfs_filesystem *fs = NULL;
@@ -918,7 +918,7 @@ static int dfs_cromfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-static int dfs_cromfs_open(struct dfs_fd *file)
+static int dfs_cromfs_open(struct dfs_file *file)
 {
     int ret = 0;
     struct dfs_filesystem *fs = NULL;
@@ -1047,7 +1047,7 @@ static int dfs_cromfs_stat(struct dfs_filesystem *fs, const char *path, struct s
     return RT_EOK;
 }
 
-static int dfs_cromfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+static int dfs_cromfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     uint32_t index = 0;
     uint8_t *name = NULL;
diff --git a/components/dfs/dfs_v1/filesystems/devfs/devfs.c b/components/dfs/dfs_v1/filesystems/devfs/devfs.c
index f0b7327ecdd7730f5400199fc92b984f1e5a4ff2..0779a594d048d1390b315dc2c9d35068b14cbcf6 100644
--- a/components/dfs/dfs_v1/filesystems/devfs/devfs.c
+++ b/components/dfs/dfs_v1/filesystems/devfs/devfs.c
@@ -39,7 +39,7 @@ int dfs_device_fs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_device_fs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_device_fs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     rt_err_t result;
     rt_device_t dev_id;
@@ -61,7 +61,7 @@ int dfs_device_fs_ioctl(struct dfs_fd *file, int cmd, void *args)
     return result;
 }
 
-int dfs_device_fs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_device_fs_read(struct dfs_file *file, void *buf, size_t count)
 {
     int result;
     rt_device_t dev_id;
@@ -82,7 +82,7 @@ int dfs_device_fs_read(struct dfs_fd *file, void *buf, size_t count)
     return result;
 }
 
-int dfs_device_fs_write(struct dfs_fd *file, const void *buf, size_t count)
+int dfs_device_fs_write(struct dfs_file *file, const void *buf, size_t count)
 {
     int result;
     rt_device_t dev_id;
@@ -103,7 +103,7 @@ int dfs_device_fs_write(struct dfs_fd *file, const void *buf, size_t count)
     return result;
 }
 
-int dfs_device_fs_close(struct dfs_fd *file)
+int dfs_device_fs_close(struct dfs_file *file)
 {
     rt_err_t result;
     rt_device_t dev_id;
@@ -144,7 +144,7 @@ int dfs_device_fs_close(struct dfs_fd *file)
     return -EIO;
 }
 
-int dfs_device_fs_open(struct dfs_fd *file)
+int dfs_device_fs_open(struct dfs_file *file)
 {
     rt_err_t result;
     rt_device_t device;
@@ -334,7 +334,7 @@ int dfs_device_fs_stat(struct dfs_filesystem *fs, const char *path, struct stat
     return -ENOENT;
 }
 
-int dfs_device_fs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_device_fs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     rt_uint32_t index;
     rt_object_t object;
@@ -373,7 +373,7 @@ int dfs_device_fs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t co
     return index * sizeof(struct dirent);
 }
 
-static int dfs_device_fs_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int dfs_device_fs_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int mask = 0;
 
diff --git a/components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c b/components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c
index 7e35dac79a8a8589f192201990786e0f9e793d11..a2a6258f36ed2b45ce9e5b7d53934a17d5fc58ad 100644
--- a/components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c
+++ b/components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c
@@ -328,7 +328,7 @@ int dfs_elm_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return 0;
 }
 
-int dfs_elm_open(struct dfs_fd *file)
+int dfs_elm_open(struct dfs_file *file)
 {
     FIL *fd;
     BYTE mode;
@@ -464,7 +464,7 @@ int dfs_elm_open(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_elm_close(struct dfs_fd *file)
+int dfs_elm_close(struct dfs_file *file)
 {
     FRESULT result;
 
@@ -501,7 +501,7 @@ int dfs_elm_close(struct dfs_fd *file)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_elm_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     switch (cmd)
     {
@@ -537,7 +537,7 @@ int dfs_elm_ioctl(struct dfs_fd *file, int cmd, void *args)
     return -ENOSYS;
 }
 
-int dfs_elm_read(struct dfs_fd *file, void *buf, size_t len)
+int dfs_elm_read(struct dfs_file *file, void *buf, size_t len)
 {
     FIL *fd;
     FRESULT result;
@@ -560,7 +560,7 @@ int dfs_elm_read(struct dfs_fd *file, void *buf, size_t len)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_write(struct dfs_fd *file, const void *buf, size_t len)
+int dfs_elm_write(struct dfs_file *file, const void *buf, size_t len)
 {
     FIL *fd;
     FRESULT result;
@@ -584,7 +584,7 @@ int dfs_elm_write(struct dfs_fd *file, const void *buf, size_t len)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_flush(struct dfs_fd *file)
+int dfs_elm_flush(struct dfs_file *file)
 {
     FIL *fd;
     FRESULT result;
@@ -596,7 +596,7 @@ int dfs_elm_flush(struct dfs_fd *file)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_lseek(struct dfs_fd *file, off_t offset)
+int dfs_elm_lseek(struct dfs_file *file, off_t offset)
 {
     FRESULT result = FR_OK;
     if (file->vnode->type == FT_REGULAR)
@@ -635,7 +635,7 @@ int dfs_elm_lseek(struct dfs_fd *file, off_t offset)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_elm_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     DIR *dir;
     FILINFO fno;
diff --git a/components/dfs/dfs_v1/filesystems/nfs/dfs_nfs.c b/components/dfs/dfs_v1/filesystems/nfs/dfs_nfs.c
index aca6cf611a0bd2cafc871c2983a97ebe117e1998..9adc5b6c4214a45a8a33a1d54f334689f818bbde 100644
--- a/components/dfs/dfs_v1/filesystems/nfs/dfs_nfs.c
+++ b/components/dfs/dfs_v1/filesystems/nfs/dfs_nfs.c
@@ -546,12 +546,12 @@ int nfs_unmount(struct dfs_filesystem *fs)
     return 0;
 }
 
-int nfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int nfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -ENOSYS;
 }
 
-int nfs_read(struct dfs_fd *file, void *buf, size_t count)
+int nfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     READ3args args;
     READ3res res;
@@ -620,7 +620,7 @@ int nfs_read(struct dfs_fd *file, void *buf, size_t count)
     return total;
 }
 
-int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
+int nfs_write(struct dfs_file *file, const void *buf, size_t count)
 {
     WRITE3args args;
     WRITE3res res;
@@ -685,7 +685,7 @@ int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
     return total;
 }
 
-int nfs_lseek(struct dfs_fd *file, off_t offset)
+int nfs_lseek(struct dfs_file *file, off_t offset)
 {
     nfs_file *fd;
     nfs_filesystem *nfs;
@@ -709,7 +709,7 @@ int nfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int nfs_close(struct dfs_fd *file)
+int nfs_close(struct dfs_file *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->vnode->fs != NULL);
@@ -746,7 +746,7 @@ int nfs_close(struct dfs_fd *file)
     return 0;
 }
 
-int nfs_open(struct dfs_fd *file)
+int nfs_open(struct dfs_file *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->vnode->fs != NULL);
@@ -1103,7 +1103,7 @@ int nfs_rename(struct dfs_filesystem *fs, const char *src, const char *dest)
     return ret;
 }
 
-int nfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int nfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     nfs_dir *dir;
     rt_uint32_t index;
diff --git a/components/dfs/dfs_v1/filesystems/ramfs/dfs_ramfs.c b/components/dfs/dfs_v1/filesystems/ramfs/dfs_ramfs.c
index f31b76f0e2754713f23dc6ba21d855dd7084bc3a..fd7326bd01845c4869329b4abd0267143fb3760e 100644
--- a/components/dfs/dfs_v1/filesystems/ramfs/dfs_ramfs.c
+++ b/components/dfs/dfs_v1/filesystems/ramfs/dfs_ramfs.c
@@ -54,7 +54,7 @@ int dfs_ramfs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_ramfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_ramfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -EIO;
 }
@@ -92,7 +92,7 @@ struct ramfs_dirent *dfs_ramfs_lookup(struct dfs_ramfs *ramfs,
     return NULL;
 }
 
-int dfs_ramfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_ramfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct ramfs_dirent *dirent;
@@ -114,7 +114,7 @@ int dfs_ramfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-int dfs_ramfs_write(struct dfs_fd *fd, const void *buf, size_t count)
+int dfs_ramfs_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     struct ramfs_dirent *dirent;
     struct dfs_ramfs *ramfs;
@@ -151,7 +151,7 @@ int dfs_ramfs_write(struct dfs_fd *fd, const void *buf, size_t count)
     return count;
 }
 
-int dfs_ramfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_ramfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= (off_t)file->vnode->size)
     {
@@ -163,7 +163,7 @@ int dfs_ramfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_ramfs_close(struct dfs_fd *file)
+int dfs_ramfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -176,7 +176,7 @@ int dfs_ramfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_ramfs_open(struct dfs_fd *file)
+int dfs_ramfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct dfs_ramfs *ramfs;
@@ -316,7 +316,7 @@ int dfs_ramfs_stat(struct dfs_filesystem *fs,
     return RT_EOK;
 }
 
-int dfs_ramfs_getdents(struct dfs_fd *file,
+int dfs_ramfs_getdents(struct dfs_file *file,
                        struct dirent *dirp,
                        uint32_t    count)
 {
diff --git a/components/dfs/dfs_v1/filesystems/romfs/dfs_romfs.c b/components/dfs/dfs_v1/filesystems/romfs/dfs_romfs.c
index bdce2a8bb2e00a1a888ac25bac65eef1659b963f..8c80b5690e5940cf7d414eface13a0ea75ff24d5 100644
--- a/components/dfs/dfs_v1/filesystems/romfs/dfs_romfs.c
+++ b/components/dfs/dfs_v1/filesystems/romfs/dfs_romfs.c
@@ -32,7 +32,7 @@ int dfs_romfs_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-int dfs_romfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_romfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     int ret = RT_EOK;
     struct romfs_dirent *dirent;
@@ -146,7 +146,7 @@ struct romfs_dirent *dfs_romfs_lookup(struct romfs_dirent *root_dirent, const ch
     return NULL;
 }
 
-int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_romfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct romfs_dirent *dirent;
@@ -173,7 +173,7 @@ int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-int dfs_romfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_romfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= file->vnode->size)
     {
@@ -184,7 +184,7 @@ int dfs_romfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_romfs_close(struct dfs_fd *file)
+int dfs_romfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -195,7 +195,7 @@ int dfs_romfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_romfs_open(struct dfs_fd *file)
+int dfs_romfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct romfs_dirent *dirent;
@@ -294,7 +294,7 @@ int dfs_romfs_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
     return RT_EOK;
 }
 
-int dfs_romfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_romfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     rt_size_t index;
     rt_size_t len;
diff --git a/components/dfs/dfs_v1/filesystems/skeleton/skeleton.c b/components/dfs/dfs_v1/filesystems/skeleton/skeleton.c
index b8dc06e9b5713c9a6fc3f43a5ca0d686f96d745a..5c35cd1ffc301a8a5e2c507026e84233830971f5 100644
--- a/components/dfs/dfs_v1/filesystems/skeleton/skeleton.c
+++ b/components/dfs/dfs_v1/filesystems/skeleton/skeleton.c
@@ -24,27 +24,27 @@ int dfs_skt_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-int dfs_skt_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_skt_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -RT_EIO;
 }
 
-int dfs_skt_read(struct dfs_fd *file, void *buf, rt_size_t count)
+int dfs_skt_read(struct dfs_file *file, void *buf, rt_size_t count)
 {
     return count;
 }
 
-int dfs_skt_lseek(struct dfs_fd *file, rt_off_t offset)
+int dfs_skt_lseek(struct dfs_file *file, rt_off_t offset)
 {
     return -RT_EIO;
 }
 
-int dfs_skt_close(struct dfs_fd *file)
+int dfs_skt_close(struct dfs_file *file)
 {
     return RT_EOK;
 }
 
-int dfs_skt_open(struct dfs_fd *file)
+int dfs_skt_open(struct dfs_file *file)
 {
     return RT_EOK;
 }
@@ -54,7 +54,7 @@ int dfs_skt_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
     return RT_EOK;
 }
 
-int dfs_skt_getdents(struct dfs_fd *file, struct dirent *dirp, rt_uint32_t count)
+int dfs_skt_getdents(struct dfs_file *file, struct dirent *dirp, rt_uint32_t count)
 {
     return count * sizeof(struct dirent);
 }
diff --git a/components/dfs/dfs_v1/filesystems/tmpfs/dfs_tmpfs.c b/components/dfs/dfs_v1/filesystems/tmpfs/dfs_tmpfs.c
index 5dbd17428601b7f78e3a8bb64bcd62ae6b174fea..f8a4a8bc5889d587dc747e339786363fda88e748 100644
--- a/components/dfs/dfs_v1/filesystems/tmpfs/dfs_tmpfs.c
+++ b/components/dfs/dfs_v1/filesystems/tmpfs/dfs_tmpfs.c
@@ -162,7 +162,7 @@ int dfs_tmpfs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_tmpfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_tmpfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     struct tmpfs_file *d_file;
     struct tmpfs_sb *superblock;
@@ -263,7 +263,7 @@ find_subpath:
     return NULL;
 }
 
-int dfs_tmpfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_tmpfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct tmpfs_file *d_file;
@@ -286,7 +286,7 @@ int dfs_tmpfs_read(struct dfs_fd *file, void *buf, size_t count)
 }
 
 
-int dfs_tmpfs_write(struct dfs_fd *fd, const void *buf, size_t count)
+int dfs_tmpfs_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     struct tmpfs_file *d_file;
     struct tmpfs_sb *superblock;
@@ -324,7 +324,7 @@ int dfs_tmpfs_write(struct dfs_fd *fd, const void *buf, size_t count)
     return count;
 }
 
-int dfs_tmpfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_tmpfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= (off_t)file->vnode->size)
     {
@@ -336,7 +336,7 @@ int dfs_tmpfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_tmpfs_close(struct dfs_fd *file)
+int dfs_tmpfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -349,7 +349,7 @@ int dfs_tmpfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_tmpfs_open(struct dfs_fd *file)
+int dfs_tmpfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct tmpfs_sb *superblock;
@@ -498,7 +498,7 @@ int dfs_tmpfs_stat(struct dfs_filesystem *fs,
     return RT_EOK;
 }
 
-int dfs_tmpfs_getdents(struct dfs_fd *file,
+int dfs_tmpfs_getdents(struct dfs_file *file,
                        struct dirent *dirp,
                        uint32_t    count)
 {
diff --git a/components/dfs/dfs_v1/include/dfs.h b/components/dfs/dfs_v1/include/dfs.h
index b2575fbf4d66abcb0c46effa915c71fe046cfac8..1fbe6b77cd9cd9142e00610f2222a5f5772237de 100644
--- a/components/dfs/dfs_v1/include/dfs.h
+++ b/components/dfs/dfs_v1/include/dfs.h
@@ -72,7 +72,7 @@ extern "C" {
 struct dfs_fdtable
 {
     uint32_t maxfd;
-    struct dfs_fd **fds;
+    struct dfs_file **fds;
 };
 
 /* Initialization of dfs */
@@ -87,24 +87,26 @@ struct dfs_fdtable *dfs_fdtable_get(void);
 void dfs_lock(void);
 void dfs_unlock(void);
 
-void dfs_fd_lock(void);
-void dfs_fd_unlock(void);
+void dfs_file_lock(void);
+void dfs_file_unlock(void);
 
 void dfs_fm_lock(void);
 void dfs_fm_unlock(void);
 
 #ifdef DFS_USING_POSIX
+
 /* FD APIs */
 int fdt_fd_new(struct dfs_fdtable *fdt);
-struct dfs_fd *fdt_fd_get(struct dfs_fdtable* fdt, int fd);
+struct dfs_file *fdt_fd_get(struct dfs_fdtable* fdt, int fd);
 void fdt_fd_release(struct dfs_fdtable* fdt, int fd);
+
 int fd_new(void);
-int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file);
-struct dfs_fd *fd_get(int fd);
-int fd_get_fd_index(struct dfs_fd *file);
+struct dfs_file *fd_get(int fd);
 void fd_release(int fd);
 
-void fd_init(struct dfs_fd *fd);
+void fd_init(struct dfs_file *fd);
+int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_file *file);
+int fd_get_fd_index(struct dfs_file *file);
 
 struct dfs_fdtable *dfs_fdtable_get(void);
 struct dfs_fdtable *dfs_fdtable_get_global(void);
diff --git a/components/dfs/dfs_v1/include/dfs_file.h b/components/dfs/dfs_v1/include/dfs_file.h
index 72581273319153d81e5df2860355c1b55b708779..b81861436548937ecef58d384a61ba9b23346c78 100644
--- a/components/dfs/dfs_v1/include/dfs_file.h
+++ b/components/dfs/dfs_v1/include/dfs_file.h
@@ -22,22 +22,22 @@ struct rt_pollreq;
 
 struct dfs_file_ops
 {
-    int (*open)     (struct dfs_fd *fd);
-    int (*close)    (struct dfs_fd *fd);
-    int (*ioctl)    (struct dfs_fd *fd, int cmd, void *args);
-    int (*read)     (struct dfs_fd *fd, void *buf, size_t count);
-    int (*write)    (struct dfs_fd *fd, const void *buf, size_t count);
-    int (*flush)    (struct dfs_fd *fd);
-    int (*lseek)    (struct dfs_fd *fd, off_t offset);
-    int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, uint32_t count);
-
-    int (*poll)     (struct dfs_fd *fd, struct rt_pollreq *req);
+    int (*open)     (struct dfs_file *fd);
+    int (*close)    (struct dfs_file *fd);
+    int (*ioctl)    (struct dfs_file *fd, int cmd, void *args);
+    int (*read)     (struct dfs_file *fd, void *buf, size_t count);
+    int (*write)    (struct dfs_file *fd, const void *buf, size_t count);
+    int (*flush)    (struct dfs_file *fd);
+    int (*lseek)    (struct dfs_file *fd, off_t offset);
+    int (*getdents) (struct dfs_file *fd, struct dirent *dirp, uint32_t count);
+
+    int (*poll)     (struct dfs_file *fd, struct rt_pollreq *req);
 };
 
 /* file descriptor */
 #define DFS_FD_MAGIC     0xfdfd
 
-struct dfs_fnode
+struct dfs_vnode
 {
     uint16_t type;               /* Type (regular or socket) */
 
@@ -54,13 +54,13 @@ struct dfs_fnode
     void *data;                  /* Specific file system data */
 };
 
-struct dfs_fd
+struct dfs_file
 {
     uint16_t magic;              /* file descriptor magic number */
     uint32_t flags;              /* Descriptor flags */
     int ref_count;               /* Descriptor reference count */
     off_t    pos;                /* Current file position */
-    struct dfs_fnode *vnode;     /* file node struct */
+    struct dfs_vnode *vnode;     /* file node struct */
     void *data;                  /* Specific fd data */
 };
 
@@ -75,22 +75,22 @@ struct dfs_mmap2_args
     void *ret;
 };
 
-void dfs_fnode_mgr_init(void);
+void dfs_vnode_mgr_init(void);
 int dfs_file_is_open(const char *pathname);
-int dfs_file_open(struct dfs_fd *fd, const char *path, int flags);
-int dfs_file_close(struct dfs_fd *fd);
-int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args);
-int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len);
-int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes);
+int dfs_file_open(struct dfs_file *fd, const char *path, int flags);
+int dfs_file_close(struct dfs_file *fd);
+int dfs_file_ioctl(struct dfs_file *fd, int cmd, void *args);
+int dfs_file_read(struct dfs_file *fd, void *buf, size_t len);
+int dfs_file_getdents(struct dfs_file *fd, struct dirent *dirp, size_t nbytes);
 int dfs_file_unlink(const char *path);
-int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len);
-int dfs_file_flush(struct dfs_fd *fd);
-int dfs_file_lseek(struct dfs_fd *fd, off_t offset);
+int dfs_file_write(struct dfs_file *fd, const void *buf, size_t len);
+int dfs_file_flush(struct dfs_file *fd);
+int dfs_file_lseek(struct dfs_file *fd, off_t offset);
 
 int dfs_file_stat(const char *path, struct stat *buf);
 int dfs_file_rename(const char *oldpath, const char *newpath);
-int dfs_file_ftruncate(struct dfs_fd *fd, off_t length);
-int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2);
+int dfs_file_ftruncate(struct dfs_file *fd, off_t length);
+int dfs_file_mmap2(struct dfs_file *fd, struct dfs_mmap2_args *mmap2);
 
 /* 0x5254 is just a magic number to make these relatively unique ("RT") */
 #define RT_FIOFTRUNCATE  0x52540000U
diff --git a/components/dfs/dfs_v1/include/dfs_fs.h b/components/dfs/dfs_v1/include/dfs_fs.h
index 985017afe027bb779b6d8f5bde85a5a9b057b536..adfed8d787a1b0f0483dcf2bc3c49d2489234429 100644
--- a/components/dfs/dfs_v1/include/dfs_fs.h
+++ b/components/dfs/dfs_v1/include/dfs_fs.h
@@ -21,7 +21,7 @@ extern "C" {
 
 /* Pre-declaration */
 struct dfs_filesystem;
-struct dfs_fd;
+struct dfs_file;
 
 /* File system operations */
 struct dfs_filesystem_ops
diff --git a/components/dfs/dfs_v1/src/dfs.c b/components/dfs/dfs_v1/src/dfs.c
index e2928f5e1b97a8fcbb195b71c322240d9b16f494..cd68bf5828ffc3c09f4df2a2944e20ca6c0623de 100644
--- a/components/dfs/dfs_v1/src/dfs.c
+++ b/components/dfs/dfs_v1/src/dfs.c
@@ -57,7 +57,7 @@ int dfs_init(void)
     }
 
     /* init vnode hash table */
-    dfs_fnode_mgr_init();
+    dfs_vnode_mgr_init();
 
     /* clear filesystem operations table */
     rt_memset((void *)filesystem_operation_table, 0, sizeof(filesystem_operation_table));
@@ -127,7 +127,7 @@ void dfs_lock(void)
     }
 }
 
-void dfs_fd_lock(void)
+void dfs_file_lock(void)
 {
     rt_err_t result = -RT_EBUSY;
 
@@ -154,7 +154,7 @@ void dfs_unlock(void)
 
 #ifdef DFS_USING_POSIX
 
-void dfs_fd_unlock(void)
+void dfs_file_unlock(void)
 {
     rt_mutex_release(&fdlock);
 }
@@ -163,7 +163,7 @@ static int fd_slot_expand(struct dfs_fdtable *fdt, int fd)
 {
     int nr;
     int index;
-    struct dfs_fd **fds = NULL;
+    struct dfs_file **fds = NULL;
 
     if (fd < fdt->maxfd)
     {
@@ -179,7 +179,7 @@ static int fd_slot_expand(struct dfs_fdtable *fdt, int fd)
     {
         nr = DFS_FD_MAX;
     }
-    fds = (struct dfs_fd **)rt_realloc(fdt->fds, nr * sizeof(struct dfs_fd *));
+    fds = (struct dfs_file **)rt_realloc(fdt->fds, nr * sizeof(struct dfs_file *));
     if (!fds)
     {
         return -1;
@@ -223,16 +223,16 @@ static int fd_slot_alloc(struct dfs_fdtable *fdt, int startfd)
 static int fd_alloc(struct dfs_fdtable *fdt, int startfd)
 {
     int idx;
-    struct dfs_fd *fd = NULL;
+    struct dfs_file *fd = NULL;
 
     idx = fd_slot_alloc(fdt, startfd);
 
-    /* allocate  'struct dfs_fd' */
+    /* allocate  'struct dfs_file' */
     if (idx < 0)
     {
         return -1;
     }
-    fd = (struct dfs_fd *)rt_calloc(1, sizeof(struct dfs_fd));
+    fd = (struct dfs_file *)rt_calloc(1, sizeof(struct dfs_file));
     if (!fd)
     {
         return -1;
@@ -256,7 +256,7 @@ int fdt_fd_new(struct dfs_fdtable *fdt)
     int idx;
 
     /* lock filesystem */
-    dfs_fd_lock();
+    dfs_file_lock();
 
     /* find an empty fd entry */
     idx = fd_alloc(fdt, DFS_STDIO_OFFSET);
@@ -267,7 +267,7 @@ int fdt_fd_new(struct dfs_fdtable *fdt)
         LOG_E("DFS fd new is failed! Could not found an empty fd entry.");
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return idx;
 }
 
@@ -289,31 +289,31 @@ int fd_new(void)
  * pointer.
  */
 
-struct dfs_fd *fdt_fd_get(struct dfs_fdtable* fdt, int fd)
+struct dfs_file *fdt_fd_get(struct dfs_fdtable* fdt, int fd)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     if (fd < 0 || fd >= (int)fdt->maxfd)
     {
         return NULL;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
     d = fdt->fds[fd];
 
-    /* check dfs_fd valid or not */
+    /* check dfs_file valid or not */
     if ((d == NULL) || (d->magic != DFS_FD_MAGIC))
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return NULL;
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
 
     return d;
 }
 
-struct dfs_fd *fd_get(int fd)
+struct dfs_file *fd_get(int fd)
 {
     struct dfs_fdtable *fdt;
 
@@ -328,22 +328,22 @@ struct dfs_fd *fd_get(int fd)
  */
 void fdt_fd_release(struct dfs_fdtable* fdt, int fd)
 {
-    struct dfs_fd *fd_slot = NULL;
+    struct dfs_file *fd_slot = NULL;
 
     RT_ASSERT(fdt != NULL);
 
-    dfs_fd_lock();
+    dfs_file_lock();
 
     if ((fd < 0) || (fd >= fdt->maxfd))
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return;
     }
 
     fd_slot = fdt->fds[fd];
     if (fd_slot == NULL)
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return;
     }
     fdt->fds[fd] = NULL;
@@ -356,14 +356,14 @@ void fdt_fd_release(struct dfs_fdtable* fdt, int fd)
     /* clear this fd entry */
     if (fd_slot->ref_count == 0)
     {
-        struct dfs_fnode *vnode = fd_slot->vnode;
+        struct dfs_vnode *vnode = fd_slot->vnode;
         if (vnode)
         {
             vnode->ref_count--;
         }
         rt_free(fd_slot);
     }
-    dfs_fd_unlock();
+    dfs_file_unlock();
 }
 
 void fd_release(int fd)
@@ -379,7 +379,7 @@ rt_err_t sys_dup(int oldfd)
     int newfd = -1;
     struct dfs_fdtable *fdt = NULL;
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     fdt = dfs_fdtable_get();
     if ((oldfd < 0) || (oldfd >= fdt->maxfd))
@@ -399,7 +399,7 @@ rt_err_t sys_dup(int oldfd)
         fdt->fds[newfd]->ref_count++;
     }
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return newfd;
 }
 
@@ -419,7 +419,7 @@ int fd_is_open(const char *pathname)
     char *fullpath;
     unsigned int index;
     struct dfs_filesystem *fs;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
     struct dfs_fdtable *fdt;
 
     fdt = dfs_fdtable_get();
@@ -472,7 +472,7 @@ rt_err_t sys_dup2(int oldfd, int newfd)
     int ret = 0;
     int retfd = -1;
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     fdt = dfs_fdtable_get();
     if ((oldfd < 0) || (oldfd >= fdt->maxfd))
@@ -517,11 +517,11 @@ rt_err_t sys_dup2(int oldfd, int newfd)
     fdt->fds[newfd]->ref_count++;
     retfd = newfd;
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return retfd;
 }
 
-static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file)
+static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_file *file)
 {
     int fd = -1;
 
@@ -530,7 +530,7 @@ static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file
         return -1;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
 
     for(int index = 0; index < (int)fdt->maxfd; index++)
     {
@@ -541,12 +541,12 @@ static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file
         }
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
 
     return fd;
 }
 
-int fd_get_fd_index(struct dfs_fd *file)
+int fd_get_fd_index(struct dfs_file *file)
 {
     struct dfs_fdtable *fdt;
 
@@ -554,7 +554,7 @@ int fd_get_fd_index(struct dfs_fd *file)
     return fd_get_fd_index_form_fdt(fdt, file);
 }
 
-int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
+int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_file *file)
 {
     int retfd = -1;
 
@@ -567,7 +567,7 @@ int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
         return retfd;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     if ((fd < 0) || (fd >= fdt->maxfd))
     {
@@ -583,11 +583,11 @@ int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
     fdt->fds[fd] = file;
     retfd = fd;
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return retfd;
 }
 
-void fd_init(struct dfs_fd *fd)
+void fd_init(struct dfs_file *fd)
 {
     if (fd)
     {
@@ -826,7 +826,7 @@ int list_fd(void)
     rt_kprintf("-- ------  --- ----- ------\n");
     for (index = 0; index < (int)fd_table->maxfd; index++)
     {
-        struct dfs_fd *fd = fd_table->fds[index];
+        struct dfs_file *fd = fd_table->fds[index];
 
         if (fd && fd->vnode->fops)
         {
@@ -880,7 +880,7 @@ static int lsofp(int pid)
     rt_enter_critical();
     for (index = 0; index < (int)fd_table->maxfd; index++)
     {
-        struct dfs_fd *fd = fd_table->fds[index];
+        struct dfs_file *fd = fd_table->fds[index];
 
         if (fd && fd->vnode->fops)
         {
diff --git a/components/dfs/dfs_v1/src/dfs_file.c b/components/dfs/dfs_v1/src/dfs_file.c
index 56a28f5331669c5df39b079ab280a2229c66b31f..fe63fc987a40c7ccaef97ef13f6e0b093bf1d31f 100644
--- a/components/dfs/dfs_v1/src/dfs_file.c
+++ b/components/dfs/dfs_v1/src/dfs_file.c
@@ -16,15 +16,15 @@
 #include <dfs_private.h>
 #include <unistd.h>
 
-#define DFS_FNODE_HASH_NR 128
+#define DFS_VNODE_HASH_NR 128
 
-struct dfs_fnode_mgr
+struct dfs_vnode_mgr
 {
     struct rt_mutex lock;
-    rt_list_t head[DFS_FNODE_HASH_NR];
+    rt_list_t head[DFS_VNODE_HASH_NR];
 };
 
-static struct dfs_fnode_mgr dfs_fm;
+static struct dfs_vnode_mgr dfs_fm;
 
 void dfs_fm_lock(void)
 {
@@ -36,12 +36,12 @@ void dfs_fm_unlock(void)
     rt_mutex_release(&dfs_fm.lock);
 }
 
-void dfs_fnode_mgr_init(void)
+void dfs_vnode_mgr_init(void)
 {
     int i = 0;
 
     rt_mutex_init(&dfs_fm.lock, "dfs_mgr", RT_IPC_FLAG_PRIO);
-    for (i = 0; i < DFS_FNODE_HASH_NR; i++)
+    for (i = 0; i < DFS_VNODE_HASH_NR; i++)
     {
         rt_list_init(&dfs_fm.head[i]);
     }
@@ -58,12 +58,12 @@ static unsigned int bkdr_hash(const char *str)
         hash = hash * seed + (*str++);
     }
 
-    return (hash % DFS_FNODE_HASH_NR);
+    return (hash % DFS_VNODE_HASH_NR);
 }
 
-static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
+static struct dfs_vnode *dfs_vnode_find(const char *path, rt_list_t **hash_head)
 {
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int hash = bkdr_hash(path);
     rt_list_t *hh;
 
@@ -76,7 +76,7 @@ static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
 
     while (hh != &dfs_fm.head[hash])
     {
-        vnode = rt_container_of(hh, struct dfs_fnode, list);
+        vnode = rt_container_of(hh, struct dfs_vnode, list);
         if (rt_strcmp(path, vnode->fullpath) == 0)
         {
             /* found */
@@ -103,13 +103,13 @@ static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
 int dfs_file_is_open(const char *pathname)
 {
     char *fullpath = NULL;
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int ret = 0;
 
     fullpath = dfs_normalize_path(NULL, pathname);
 
     dfs_fm_lock();
-    vnode = dfs_fnode_find(fullpath, NULL);
+    vnode = dfs_vnode_find(fullpath, NULL);
     if (vnode)
     {
         ret = 1;
@@ -130,12 +130,12 @@ int dfs_file_is_open(const char *pathname)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
+int dfs_file_open(struct dfs_file *fd, const char *path, int flags)
 {
     struct dfs_filesystem *fs;
     char *fullpath;
     int result;
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     rt_list_t *hash_head;
 
     /* parameter check */
@@ -153,7 +153,7 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
 
     dfs_fm_lock();
     /* vnode find */
-    vnode = dfs_fnode_find(fullpath, &hash_head);
+    vnode = dfs_vnode_find(fullpath, &hash_head);
     if (vnode)
     {
         vnode->ref_count++;
@@ -173,7 +173,7 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
             return -ENOENT;
         }
 
-        vnode = rt_calloc(1, sizeof(struct dfs_fnode));
+        vnode = rt_calloc(1, sizeof(struct dfs_vnode));
         if (!vnode)
         {
             dfs_fm_unlock();
@@ -270,9 +270,9 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_close(struct dfs_fd *fd)
+int dfs_file_close(struct dfs_file *fd)
 {
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int result = 0;
 
     if (fd == NULL)
@@ -331,7 +331,7 @@ int dfs_file_close(struct dfs_fd *fd)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args)
+int dfs_file_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     if (fd == NULL)
     {
@@ -376,7 +376,7 @@ int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args)
  *
  * @return the actual read data bytes or 0 on end of file or failed.
  */
-int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len)
+int dfs_file_read(struct dfs_file *fd, void *buf, size_t len)
 {
     int result = 0;
 
@@ -407,7 +407,7 @@ int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len)
  *
  * @return the read dirent, others on failed.
  */
-int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes)
+int dfs_file_getdents(struct dfs_file *fd, struct dirent *dirp, size_t nbytes)
 {
     /* parameter check */
     if (fd == NULL)
@@ -490,7 +490,7 @@ __exit:
  *
  * @return the actual written data length.
  */
-int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len)
+int dfs_file_write(struct dfs_file *fd, const void *buf, size_t len)
 {
     if (fd == NULL)
     {
@@ -512,7 +512,7 @@ int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_flush(struct dfs_fd *fd)
+int dfs_file_flush(struct dfs_file *fd)
 {
     if (fd == NULL)
         return -EINVAL;
@@ -531,7 +531,7 @@ int dfs_file_flush(struct dfs_fd *fd)
  *
  * @return the current position after seek.
  */
-int dfs_file_lseek(struct dfs_fd *fd, off_t offset)
+int dfs_file_lseek(struct dfs_file *fd, off_t offset)
 {
     int result;
 
@@ -703,7 +703,7 @@ __exit:
  *
  * @return the status of truncated.
  */
-int dfs_file_ftruncate(struct dfs_fd *fd, off_t length)
+int dfs_file_ftruncate(struct dfs_file *fd, off_t length)
 {
     int result;
 
@@ -723,7 +723,7 @@ int dfs_file_ftruncate(struct dfs_fd *fd, off_t length)
     return result;
 }
 
-int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2)
+int dfs_file_mmap2(struct dfs_file *fd, struct dfs_mmap2_args *mmap2)
 {
     int ret = 0;
 
@@ -752,7 +752,7 @@ int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2)
 
 void ls(const char *pathname)
 {
-    struct dfs_fd fd;
+    struct dfs_file fd;
     struct dirent dirent;
     struct stat stat;
     int length;
@@ -834,7 +834,7 @@ FINSH_FUNCTION_EXPORT(rm, remove files or directories);
 
 void cat(const char *filename)
 {
-    struct dfs_fd fd;
+    struct dfs_file fd;
     int length = 0;
     char buffer[81];
 
@@ -867,8 +867,8 @@ FINSH_FUNCTION_EXPORT(cat, print file);
 #define BUF_SZ  4096
 static void copyfile(const char *src, const char *dst)
 {
-    struct dfs_fd fd;
-    struct dfs_fd src_fd;
+    struct dfs_file fd;
+    struct dfs_file src_fd;
     rt_uint8_t *block_ptr;
     rt_int32_t read_bytes;
 
@@ -928,7 +928,7 @@ static void copydir(const char *src, const char *dst)
     struct dirent dirent;
     struct stat stat;
     int length;
-    struct dfs_fd cpfd;
+    struct dfs_file cpfd;
     if (dfs_file_open(&cpfd, src, O_DIRECTORY) < 0)
     {
         rt_kprintf("open %s failed\n", src);
diff --git a/components/dfs/dfs_v1/src/dfs_fs.c b/components/dfs/dfs_v1/src/dfs_fs.c
index 7724afc7bc40d44018ed0a5d3a98230d9abc045c..e9be89106801c1fb8301ec93a84a62a06b850ba1 100644
--- a/components/dfs/dfs_v1/src/dfs_fs.c
+++ b/components/dfs/dfs_v1/src/dfs_fs.c
@@ -271,7 +271,7 @@ int dfs_mount(const char   *device_name,
     /* Check if the path exists or not, raw APIs call, fixme */
     if ((strcmp(fullpath, "/") != 0) && (strcmp(fullpath, "/dev") != 0))
     {
-        struct dfs_fd fd;
+        struct dfs_file fd;
 
         fd_init(&fd);
         if (dfs_file_open(&fd, fullpath, O_RDONLY | O_DIRECTORY) < 0)
diff --git a/components/dfs/dfs_v1/src/dfs_posix.c b/components/dfs/dfs_v1/src/dfs_posix.c
index ce1a3329d3855bd6eac2cb1fa26d0344a5bdf6b0..8c37c4afe1d7824c02836ff9f4154fad33ef8f3a 100644
--- a/components/dfs/dfs_v1/src/dfs_posix.c
+++ b/components/dfs/dfs_v1/src/dfs_posix.c
@@ -36,7 +36,7 @@
 int open(const char *file, int flags, ...)
 {
     int fd, result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* allocate a fd */
     fd = fd_new();
@@ -89,7 +89,7 @@ RTM_EXPORT(creat);
 int close(int fd)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -132,7 +132,7 @@ ssize_t read(int fd, void *buf, size_t len)
 #endif
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fd);
@@ -172,7 +172,7 @@ ssize_t write(int fd, const void *buf, size_t len)
 #endif
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fd);
@@ -208,7 +208,7 @@ RTM_EXPORT(write);
 off_t lseek(int fd, off_t offset, int whence)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -342,7 +342,7 @@ RTM_EXPORT(stat);
  */
 int fstat(int fildes, struct stat *buf)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -370,7 +370,7 @@ RTM_EXPORT(fstat);
 int fsync(int fildes)
 {
     int ret;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -401,7 +401,7 @@ RTM_EXPORT(fsync);
 int fcntl(int fildes, int cmd, ...)
 {
     int ret = -1;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -467,7 +467,7 @@ RTM_EXPORT(ioctl);
 int ftruncate(int fd, off_t length)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -531,7 +531,7 @@ RTM_EXPORT(statfs);
  */
 int fstatfs(int fildes, struct statfs *buf)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -557,7 +557,7 @@ RTM_EXPORT(fstatfs);
 int mkdir(const char *path, mode_t mode)
 {
     int fd;
-    struct dfs_fd *d;
+    struct dfs_file *d;
     int result;
 
     fd = fd_new();
@@ -619,7 +619,7 @@ RTM_EXPORT(rmdir);
  */
 DIR *opendir(const char *name)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
     int fd, result;
     DIR *t;
 
@@ -675,7 +675,7 @@ RTM_EXPORT(opendir);
 struct dirent *readdir(DIR *d)
 {
     int result;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -722,7 +722,7 @@ RTM_EXPORT(readdir);
  */
 long telldir(DIR *d)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
     long result;
 
     fd = fd_get(d->fd);
@@ -748,7 +748,7 @@ RTM_EXPORT(telldir);
  */
 void seekdir(DIR *d, long offset)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -772,7 +772,7 @@ RTM_EXPORT(seekdir);
  */
 void rewinddir(DIR *d)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -799,7 +799,7 @@ RTM_EXPORT(rewinddir);
 int closedir(DIR *d)
 {
     int result;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
diff --git a/components/dfs/dfs_v2/filesystems/cromfs/dfs_cromfs.c b/components/dfs/dfs_v2/filesystems/cromfs/dfs_cromfs.c
index f2a8424bb414c0e1d14e3c06507bf563ca603488..fee8b8dbd15349e96e246e43f1b6262e00003efe 100644
--- a/components/dfs/dfs_v2/filesystems/cromfs/dfs_cromfs.c
+++ b/components/dfs/dfs_v2/filesystems/cromfs/dfs_cromfs.c
@@ -564,7 +564,7 @@ static int dfs_cromfs_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-static int dfs_cromfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+static int dfs_cromfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -EIO;
 }
@@ -718,7 +718,7 @@ end:
     return ret;
 }
 
-static int dfs_cromfs_read(struct dfs_fd *file, void *buf, size_t count)
+static int dfs_cromfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_err_t result = RT_EOK;
     struct dfs_filesystem *fs = NULL;
@@ -788,7 +788,7 @@ static int dfs_cromfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-static int dfs_cromfs_lseek(struct dfs_fd *file, off_t offset)
+static int dfs_cromfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= file->vnode->size)
     {
@@ -890,7 +890,7 @@ static void deref_file_info(cromfs_info *ci, uint32_t partition_pos)
     }
 }
 
-static int dfs_cromfs_close(struct dfs_fd *file)
+static int dfs_cromfs_close(struct dfs_file *file)
 {
     file_info *fi = NULL;
     struct dfs_filesystem *fs = NULL;
@@ -918,7 +918,7 @@ static int dfs_cromfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-static int dfs_cromfs_open(struct dfs_fd *file)
+static int dfs_cromfs_open(struct dfs_file *file)
 {
     int ret = 0;
     struct dfs_filesystem *fs = NULL;
@@ -1047,7 +1047,7 @@ static int dfs_cromfs_stat(struct dfs_filesystem *fs, const char *path, struct s
     return RT_EOK;
 }
 
-static int dfs_cromfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+static int dfs_cromfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     uint32_t index = 0;
     uint8_t *name = NULL;
diff --git a/components/dfs/dfs_v2/filesystems/devfs/devfs.c b/components/dfs/dfs_v2/filesystems/devfs/devfs.c
index f0b7327ecdd7730f5400199fc92b984f1e5a4ff2..0779a594d048d1390b315dc2c9d35068b14cbcf6 100644
--- a/components/dfs/dfs_v2/filesystems/devfs/devfs.c
+++ b/components/dfs/dfs_v2/filesystems/devfs/devfs.c
@@ -39,7 +39,7 @@ int dfs_device_fs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_device_fs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_device_fs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     rt_err_t result;
     rt_device_t dev_id;
@@ -61,7 +61,7 @@ int dfs_device_fs_ioctl(struct dfs_fd *file, int cmd, void *args)
     return result;
 }
 
-int dfs_device_fs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_device_fs_read(struct dfs_file *file, void *buf, size_t count)
 {
     int result;
     rt_device_t dev_id;
@@ -82,7 +82,7 @@ int dfs_device_fs_read(struct dfs_fd *file, void *buf, size_t count)
     return result;
 }
 
-int dfs_device_fs_write(struct dfs_fd *file, const void *buf, size_t count)
+int dfs_device_fs_write(struct dfs_file *file, const void *buf, size_t count)
 {
     int result;
     rt_device_t dev_id;
@@ -103,7 +103,7 @@ int dfs_device_fs_write(struct dfs_fd *file, const void *buf, size_t count)
     return result;
 }
 
-int dfs_device_fs_close(struct dfs_fd *file)
+int dfs_device_fs_close(struct dfs_file *file)
 {
     rt_err_t result;
     rt_device_t dev_id;
@@ -144,7 +144,7 @@ int dfs_device_fs_close(struct dfs_fd *file)
     return -EIO;
 }
 
-int dfs_device_fs_open(struct dfs_fd *file)
+int dfs_device_fs_open(struct dfs_file *file)
 {
     rt_err_t result;
     rt_device_t device;
@@ -334,7 +334,7 @@ int dfs_device_fs_stat(struct dfs_filesystem *fs, const char *path, struct stat
     return -ENOENT;
 }
 
-int dfs_device_fs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_device_fs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     rt_uint32_t index;
     rt_object_t object;
@@ -373,7 +373,7 @@ int dfs_device_fs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t co
     return index * sizeof(struct dirent);
 }
 
-static int dfs_device_fs_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int dfs_device_fs_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int mask = 0;
 
diff --git a/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c b/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
index 7e35dac79a8a8589f192201990786e0f9e793d11..a2a6258f36ed2b45ce9e5b7d53934a17d5fc58ad 100644
--- a/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
+++ b/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
@@ -328,7 +328,7 @@ int dfs_elm_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return 0;
 }
 
-int dfs_elm_open(struct dfs_fd *file)
+int dfs_elm_open(struct dfs_file *file)
 {
     FIL *fd;
     BYTE mode;
@@ -464,7 +464,7 @@ int dfs_elm_open(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_elm_close(struct dfs_fd *file)
+int dfs_elm_close(struct dfs_file *file)
 {
     FRESULT result;
 
@@ -501,7 +501,7 @@ int dfs_elm_close(struct dfs_fd *file)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_elm_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     switch (cmd)
     {
@@ -537,7 +537,7 @@ int dfs_elm_ioctl(struct dfs_fd *file, int cmd, void *args)
     return -ENOSYS;
 }
 
-int dfs_elm_read(struct dfs_fd *file, void *buf, size_t len)
+int dfs_elm_read(struct dfs_file *file, void *buf, size_t len)
 {
     FIL *fd;
     FRESULT result;
@@ -560,7 +560,7 @@ int dfs_elm_read(struct dfs_fd *file, void *buf, size_t len)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_write(struct dfs_fd *file, const void *buf, size_t len)
+int dfs_elm_write(struct dfs_file *file, const void *buf, size_t len)
 {
     FIL *fd;
     FRESULT result;
@@ -584,7 +584,7 @@ int dfs_elm_write(struct dfs_fd *file, const void *buf, size_t len)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_flush(struct dfs_fd *file)
+int dfs_elm_flush(struct dfs_file *file)
 {
     FIL *fd;
     FRESULT result;
@@ -596,7 +596,7 @@ int dfs_elm_flush(struct dfs_fd *file)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_lseek(struct dfs_fd *file, off_t offset)
+int dfs_elm_lseek(struct dfs_file *file, off_t offset)
 {
     FRESULT result = FR_OK;
     if (file->vnode->type == FT_REGULAR)
@@ -635,7 +635,7 @@ int dfs_elm_lseek(struct dfs_fd *file, off_t offset)
     return elm_result_to_dfs(result);
 }
 
-int dfs_elm_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_elm_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     DIR *dir;
     FILINFO fno;
diff --git a/components/dfs/dfs_v2/filesystems/nfs/dfs_nfs.c b/components/dfs/dfs_v2/filesystems/nfs/dfs_nfs.c
index aca6cf611a0bd2cafc871c2983a97ebe117e1998..9adc5b6c4214a45a8a33a1d54f334689f818bbde 100644
--- a/components/dfs/dfs_v2/filesystems/nfs/dfs_nfs.c
+++ b/components/dfs/dfs_v2/filesystems/nfs/dfs_nfs.c
@@ -546,12 +546,12 @@ int nfs_unmount(struct dfs_filesystem *fs)
     return 0;
 }
 
-int nfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int nfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -ENOSYS;
 }
 
-int nfs_read(struct dfs_fd *file, void *buf, size_t count)
+int nfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     READ3args args;
     READ3res res;
@@ -620,7 +620,7 @@ int nfs_read(struct dfs_fd *file, void *buf, size_t count)
     return total;
 }
 
-int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
+int nfs_write(struct dfs_file *file, const void *buf, size_t count)
 {
     WRITE3args args;
     WRITE3res res;
@@ -685,7 +685,7 @@ int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
     return total;
 }
 
-int nfs_lseek(struct dfs_fd *file, off_t offset)
+int nfs_lseek(struct dfs_file *file, off_t offset)
 {
     nfs_file *fd;
     nfs_filesystem *nfs;
@@ -709,7 +709,7 @@ int nfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int nfs_close(struct dfs_fd *file)
+int nfs_close(struct dfs_file *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->vnode->fs != NULL);
@@ -746,7 +746,7 @@ int nfs_close(struct dfs_fd *file)
     return 0;
 }
 
-int nfs_open(struct dfs_fd *file)
+int nfs_open(struct dfs_file *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->vnode->fs != NULL);
@@ -1103,7 +1103,7 @@ int nfs_rename(struct dfs_filesystem *fs, const char *src, const char *dest)
     return ret;
 }
 
-int nfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int nfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     nfs_dir *dir;
     rt_uint32_t index;
diff --git a/components/dfs/dfs_v2/filesystems/ramfs/dfs_ramfs.c b/components/dfs/dfs_v2/filesystems/ramfs/dfs_ramfs.c
index f31b76f0e2754713f23dc6ba21d855dd7084bc3a..fd7326bd01845c4869329b4abd0267143fb3760e 100644
--- a/components/dfs/dfs_v2/filesystems/ramfs/dfs_ramfs.c
+++ b/components/dfs/dfs_v2/filesystems/ramfs/dfs_ramfs.c
@@ -54,7 +54,7 @@ int dfs_ramfs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_ramfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_ramfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -EIO;
 }
@@ -92,7 +92,7 @@ struct ramfs_dirent *dfs_ramfs_lookup(struct dfs_ramfs *ramfs,
     return NULL;
 }
 
-int dfs_ramfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_ramfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct ramfs_dirent *dirent;
@@ -114,7 +114,7 @@ int dfs_ramfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-int dfs_ramfs_write(struct dfs_fd *fd, const void *buf, size_t count)
+int dfs_ramfs_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     struct ramfs_dirent *dirent;
     struct dfs_ramfs *ramfs;
@@ -151,7 +151,7 @@ int dfs_ramfs_write(struct dfs_fd *fd, const void *buf, size_t count)
     return count;
 }
 
-int dfs_ramfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_ramfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= (off_t)file->vnode->size)
     {
@@ -163,7 +163,7 @@ int dfs_ramfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_ramfs_close(struct dfs_fd *file)
+int dfs_ramfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -176,7 +176,7 @@ int dfs_ramfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_ramfs_open(struct dfs_fd *file)
+int dfs_ramfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct dfs_ramfs *ramfs;
@@ -316,7 +316,7 @@ int dfs_ramfs_stat(struct dfs_filesystem *fs,
     return RT_EOK;
 }
 
-int dfs_ramfs_getdents(struct dfs_fd *file,
+int dfs_ramfs_getdents(struct dfs_file *file,
                        struct dirent *dirp,
                        uint32_t    count)
 {
diff --git a/components/dfs/dfs_v2/filesystems/romfs/dfs_romfs.c b/components/dfs/dfs_v2/filesystems/romfs/dfs_romfs.c
index bdce2a8bb2e00a1a888ac25bac65eef1659b963f..8c80b5690e5940cf7d414eface13a0ea75ff24d5 100644
--- a/components/dfs/dfs_v2/filesystems/romfs/dfs_romfs.c
+++ b/components/dfs/dfs_v2/filesystems/romfs/dfs_romfs.c
@@ -32,7 +32,7 @@ int dfs_romfs_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-int dfs_romfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_romfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     int ret = RT_EOK;
     struct romfs_dirent *dirent;
@@ -146,7 +146,7 @@ struct romfs_dirent *dfs_romfs_lookup(struct romfs_dirent *root_dirent, const ch
     return NULL;
 }
 
-int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_romfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct romfs_dirent *dirent;
@@ -173,7 +173,7 @@ int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
     return length;
 }
 
-int dfs_romfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_romfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= file->vnode->size)
     {
@@ -184,7 +184,7 @@ int dfs_romfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_romfs_close(struct dfs_fd *file)
+int dfs_romfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -195,7 +195,7 @@ int dfs_romfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_romfs_open(struct dfs_fd *file)
+int dfs_romfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct romfs_dirent *dirent;
@@ -294,7 +294,7 @@ int dfs_romfs_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
     return RT_EOK;
 }
 
-int dfs_romfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
+int dfs_romfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     rt_size_t index;
     rt_size_t len;
diff --git a/components/dfs/dfs_v2/filesystems/skeleton/skeleton.c b/components/dfs/dfs_v2/filesystems/skeleton/skeleton.c
index b8dc06e9b5713c9a6fc3f43a5ca0d686f96d745a..5c35cd1ffc301a8a5e2c507026e84233830971f5 100644
--- a/components/dfs/dfs_v2/filesystems/skeleton/skeleton.c
+++ b/components/dfs/dfs_v2/filesystems/skeleton/skeleton.c
@@ -24,27 +24,27 @@ int dfs_skt_unmount(struct dfs_filesystem *fs)
     return RT_EOK;
 }
 
-int dfs_skt_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_skt_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     return -RT_EIO;
 }
 
-int dfs_skt_read(struct dfs_fd *file, void *buf, rt_size_t count)
+int dfs_skt_read(struct dfs_file *file, void *buf, rt_size_t count)
 {
     return count;
 }
 
-int dfs_skt_lseek(struct dfs_fd *file, rt_off_t offset)
+int dfs_skt_lseek(struct dfs_file *file, rt_off_t offset)
 {
     return -RT_EIO;
 }
 
-int dfs_skt_close(struct dfs_fd *file)
+int dfs_skt_close(struct dfs_file *file)
 {
     return RT_EOK;
 }
 
-int dfs_skt_open(struct dfs_fd *file)
+int dfs_skt_open(struct dfs_file *file)
 {
     return RT_EOK;
 }
@@ -54,7 +54,7 @@ int dfs_skt_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
     return RT_EOK;
 }
 
-int dfs_skt_getdents(struct dfs_fd *file, struct dirent *dirp, rt_uint32_t count)
+int dfs_skt_getdents(struct dfs_file *file, struct dirent *dirp, rt_uint32_t count)
 {
     return count * sizeof(struct dirent);
 }
diff --git a/components/dfs/dfs_v2/filesystems/tmpfs/dfs_tmpfs.c b/components/dfs/dfs_v2/filesystems/tmpfs/dfs_tmpfs.c
index 5dbd17428601b7f78e3a8bb64bcd62ae6b174fea..f8a4a8bc5889d587dc747e339786363fda88e748 100644
--- a/components/dfs/dfs_v2/filesystems/tmpfs/dfs_tmpfs.c
+++ b/components/dfs/dfs_v2/filesystems/tmpfs/dfs_tmpfs.c
@@ -162,7 +162,7 @@ int dfs_tmpfs_statfs(struct dfs_filesystem *fs, struct statfs *buf)
     return RT_EOK;
 }
 
-int dfs_tmpfs_ioctl(struct dfs_fd *file, int cmd, void *args)
+int dfs_tmpfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
     struct tmpfs_file *d_file;
     struct tmpfs_sb *superblock;
@@ -263,7 +263,7 @@ find_subpath:
     return NULL;
 }
 
-int dfs_tmpfs_read(struct dfs_fd *file, void *buf, size_t count)
+int dfs_tmpfs_read(struct dfs_file *file, void *buf, size_t count)
 {
     rt_size_t length;
     struct tmpfs_file *d_file;
@@ -286,7 +286,7 @@ int dfs_tmpfs_read(struct dfs_fd *file, void *buf, size_t count)
 }
 
 
-int dfs_tmpfs_write(struct dfs_fd *fd, const void *buf, size_t count)
+int dfs_tmpfs_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     struct tmpfs_file *d_file;
     struct tmpfs_sb *superblock;
@@ -324,7 +324,7 @@ int dfs_tmpfs_write(struct dfs_fd *fd, const void *buf, size_t count)
     return count;
 }
 
-int dfs_tmpfs_lseek(struct dfs_fd *file, off_t offset)
+int dfs_tmpfs_lseek(struct dfs_file *file, off_t offset)
 {
     if (offset <= (off_t)file->vnode->size)
     {
@@ -336,7 +336,7 @@ int dfs_tmpfs_lseek(struct dfs_fd *file, off_t offset)
     return -EIO;
 }
 
-int dfs_tmpfs_close(struct dfs_fd *file)
+int dfs_tmpfs_close(struct dfs_file *file)
 {
     RT_ASSERT(file->vnode->ref_count > 0);
     if (file->vnode->ref_count > 1)
@@ -349,7 +349,7 @@ int dfs_tmpfs_close(struct dfs_fd *file)
     return RT_EOK;
 }
 
-int dfs_tmpfs_open(struct dfs_fd *file)
+int dfs_tmpfs_open(struct dfs_file *file)
 {
     rt_size_t size;
     struct tmpfs_sb *superblock;
@@ -498,7 +498,7 @@ int dfs_tmpfs_stat(struct dfs_filesystem *fs,
     return RT_EOK;
 }
 
-int dfs_tmpfs_getdents(struct dfs_fd *file,
+int dfs_tmpfs_getdents(struct dfs_file *file,
                        struct dirent *dirp,
                        uint32_t    count)
 {
diff --git a/components/dfs/dfs_v2/include/dfs.h b/components/dfs/dfs_v2/include/dfs.h
index b2575fbf4d66abcb0c46effa915c71fe046cfac8..450100fc328173dad64e633cfbedd9d69708a50b 100644
--- a/components/dfs/dfs_v2/include/dfs.h
+++ b/components/dfs/dfs_v2/include/dfs.h
@@ -72,7 +72,7 @@ extern "C" {
 struct dfs_fdtable
 {
     uint32_t maxfd;
-    struct dfs_fd **fds;
+    struct dfs_file **fds;
 };
 
 /* Initialization of dfs */
@@ -87,8 +87,8 @@ struct dfs_fdtable *dfs_fdtable_get(void);
 void dfs_lock(void);
 void dfs_unlock(void);
 
-void dfs_fd_lock(void);
-void dfs_fd_unlock(void);
+void dfs_file_lock(void);
+void dfs_file_unlock(void);
 
 void dfs_fm_lock(void);
 void dfs_fm_unlock(void);
@@ -96,15 +96,15 @@ void dfs_fm_unlock(void);
 #ifdef DFS_USING_POSIX
 /* FD APIs */
 int fdt_fd_new(struct dfs_fdtable *fdt);
-struct dfs_fd *fdt_fd_get(struct dfs_fdtable* fdt, int fd);
+struct dfs_file *fdt_fd_get(struct dfs_fdtable* fdt, int fd);
 void fdt_fd_release(struct dfs_fdtable* fdt, int fd);
 int fd_new(void);
-int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file);
-struct dfs_fd *fd_get(int fd);
-int fd_get_fd_index(struct dfs_fd *file);
+int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_file *file);
+struct dfs_file *fd_get(int fd);
+int fd_get_fd_index(struct dfs_file *file);
 void fd_release(int fd);
 
-void fd_init(struct dfs_fd *fd);
+void fd_init(struct dfs_file *fd);
 
 struct dfs_fdtable *dfs_fdtable_get(void);
 struct dfs_fdtable *dfs_fdtable_get_global(void);
diff --git a/components/dfs/dfs_v2/include/dfs_file.h b/components/dfs/dfs_v2/include/dfs_file.h
index 72581273319153d81e5df2860355c1b55b708779..b81861436548937ecef58d384a61ba9b23346c78 100644
--- a/components/dfs/dfs_v2/include/dfs_file.h
+++ b/components/dfs/dfs_v2/include/dfs_file.h
@@ -22,22 +22,22 @@ struct rt_pollreq;
 
 struct dfs_file_ops
 {
-    int (*open)     (struct dfs_fd *fd);
-    int (*close)    (struct dfs_fd *fd);
-    int (*ioctl)    (struct dfs_fd *fd, int cmd, void *args);
-    int (*read)     (struct dfs_fd *fd, void *buf, size_t count);
-    int (*write)    (struct dfs_fd *fd, const void *buf, size_t count);
-    int (*flush)    (struct dfs_fd *fd);
-    int (*lseek)    (struct dfs_fd *fd, off_t offset);
-    int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, uint32_t count);
-
-    int (*poll)     (struct dfs_fd *fd, struct rt_pollreq *req);
+    int (*open)     (struct dfs_file *fd);
+    int (*close)    (struct dfs_file *fd);
+    int (*ioctl)    (struct dfs_file *fd, int cmd, void *args);
+    int (*read)     (struct dfs_file *fd, void *buf, size_t count);
+    int (*write)    (struct dfs_file *fd, const void *buf, size_t count);
+    int (*flush)    (struct dfs_file *fd);
+    int (*lseek)    (struct dfs_file *fd, off_t offset);
+    int (*getdents) (struct dfs_file *fd, struct dirent *dirp, uint32_t count);
+
+    int (*poll)     (struct dfs_file *fd, struct rt_pollreq *req);
 };
 
 /* file descriptor */
 #define DFS_FD_MAGIC     0xfdfd
 
-struct dfs_fnode
+struct dfs_vnode
 {
     uint16_t type;               /* Type (regular or socket) */
 
@@ -54,13 +54,13 @@ struct dfs_fnode
     void *data;                  /* Specific file system data */
 };
 
-struct dfs_fd
+struct dfs_file
 {
     uint16_t magic;              /* file descriptor magic number */
     uint32_t flags;              /* Descriptor flags */
     int ref_count;               /* Descriptor reference count */
     off_t    pos;                /* Current file position */
-    struct dfs_fnode *vnode;     /* file node struct */
+    struct dfs_vnode *vnode;     /* file node struct */
     void *data;                  /* Specific fd data */
 };
 
@@ -75,22 +75,22 @@ struct dfs_mmap2_args
     void *ret;
 };
 
-void dfs_fnode_mgr_init(void);
+void dfs_vnode_mgr_init(void);
 int dfs_file_is_open(const char *pathname);
-int dfs_file_open(struct dfs_fd *fd, const char *path, int flags);
-int dfs_file_close(struct dfs_fd *fd);
-int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args);
-int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len);
-int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes);
+int dfs_file_open(struct dfs_file *fd, const char *path, int flags);
+int dfs_file_close(struct dfs_file *fd);
+int dfs_file_ioctl(struct dfs_file *fd, int cmd, void *args);
+int dfs_file_read(struct dfs_file *fd, void *buf, size_t len);
+int dfs_file_getdents(struct dfs_file *fd, struct dirent *dirp, size_t nbytes);
 int dfs_file_unlink(const char *path);
-int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len);
-int dfs_file_flush(struct dfs_fd *fd);
-int dfs_file_lseek(struct dfs_fd *fd, off_t offset);
+int dfs_file_write(struct dfs_file *fd, const void *buf, size_t len);
+int dfs_file_flush(struct dfs_file *fd);
+int dfs_file_lseek(struct dfs_file *fd, off_t offset);
 
 int dfs_file_stat(const char *path, struct stat *buf);
 int dfs_file_rename(const char *oldpath, const char *newpath);
-int dfs_file_ftruncate(struct dfs_fd *fd, off_t length);
-int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2);
+int dfs_file_ftruncate(struct dfs_file *fd, off_t length);
+int dfs_file_mmap2(struct dfs_file *fd, struct dfs_mmap2_args *mmap2);
 
 /* 0x5254 is just a magic number to make these relatively unique ("RT") */
 #define RT_FIOFTRUNCATE  0x52540000U
diff --git a/components/dfs/dfs_v2/include/dfs_fs.h b/components/dfs/dfs_v2/include/dfs_fs.h
index 985017afe027bb779b6d8f5bde85a5a9b057b536..adfed8d787a1b0f0483dcf2bc3c49d2489234429 100644
--- a/components/dfs/dfs_v2/include/dfs_fs.h
+++ b/components/dfs/dfs_v2/include/dfs_fs.h
@@ -21,7 +21,7 @@ extern "C" {
 
 /* Pre-declaration */
 struct dfs_filesystem;
-struct dfs_fd;
+struct dfs_file;
 
 /* File system operations */
 struct dfs_filesystem_ops
diff --git a/components/dfs/dfs_v2/src/dfs.c b/components/dfs/dfs_v2/src/dfs.c
index e2928f5e1b97a8fcbb195b71c322240d9b16f494..cd68bf5828ffc3c09f4df2a2944e20ca6c0623de 100644
--- a/components/dfs/dfs_v2/src/dfs.c
+++ b/components/dfs/dfs_v2/src/dfs.c
@@ -57,7 +57,7 @@ int dfs_init(void)
     }
 
     /* init vnode hash table */
-    dfs_fnode_mgr_init();
+    dfs_vnode_mgr_init();
 
     /* clear filesystem operations table */
     rt_memset((void *)filesystem_operation_table, 0, sizeof(filesystem_operation_table));
@@ -127,7 +127,7 @@ void dfs_lock(void)
     }
 }
 
-void dfs_fd_lock(void)
+void dfs_file_lock(void)
 {
     rt_err_t result = -RT_EBUSY;
 
@@ -154,7 +154,7 @@ void dfs_unlock(void)
 
 #ifdef DFS_USING_POSIX
 
-void dfs_fd_unlock(void)
+void dfs_file_unlock(void)
 {
     rt_mutex_release(&fdlock);
 }
@@ -163,7 +163,7 @@ static int fd_slot_expand(struct dfs_fdtable *fdt, int fd)
 {
     int nr;
     int index;
-    struct dfs_fd **fds = NULL;
+    struct dfs_file **fds = NULL;
 
     if (fd < fdt->maxfd)
     {
@@ -179,7 +179,7 @@ static int fd_slot_expand(struct dfs_fdtable *fdt, int fd)
     {
         nr = DFS_FD_MAX;
     }
-    fds = (struct dfs_fd **)rt_realloc(fdt->fds, nr * sizeof(struct dfs_fd *));
+    fds = (struct dfs_file **)rt_realloc(fdt->fds, nr * sizeof(struct dfs_file *));
     if (!fds)
     {
         return -1;
@@ -223,16 +223,16 @@ static int fd_slot_alloc(struct dfs_fdtable *fdt, int startfd)
 static int fd_alloc(struct dfs_fdtable *fdt, int startfd)
 {
     int idx;
-    struct dfs_fd *fd = NULL;
+    struct dfs_file *fd = NULL;
 
     idx = fd_slot_alloc(fdt, startfd);
 
-    /* allocate  'struct dfs_fd' */
+    /* allocate  'struct dfs_file' */
     if (idx < 0)
     {
         return -1;
     }
-    fd = (struct dfs_fd *)rt_calloc(1, sizeof(struct dfs_fd));
+    fd = (struct dfs_file *)rt_calloc(1, sizeof(struct dfs_file));
     if (!fd)
     {
         return -1;
@@ -256,7 +256,7 @@ int fdt_fd_new(struct dfs_fdtable *fdt)
     int idx;
 
     /* lock filesystem */
-    dfs_fd_lock();
+    dfs_file_lock();
 
     /* find an empty fd entry */
     idx = fd_alloc(fdt, DFS_STDIO_OFFSET);
@@ -267,7 +267,7 @@ int fdt_fd_new(struct dfs_fdtable *fdt)
         LOG_E("DFS fd new is failed! Could not found an empty fd entry.");
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return idx;
 }
 
@@ -289,31 +289,31 @@ int fd_new(void)
  * pointer.
  */
 
-struct dfs_fd *fdt_fd_get(struct dfs_fdtable* fdt, int fd)
+struct dfs_file *fdt_fd_get(struct dfs_fdtable* fdt, int fd)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     if (fd < 0 || fd >= (int)fdt->maxfd)
     {
         return NULL;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
     d = fdt->fds[fd];
 
-    /* check dfs_fd valid or not */
+    /* check dfs_file valid or not */
     if ((d == NULL) || (d->magic != DFS_FD_MAGIC))
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return NULL;
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
 
     return d;
 }
 
-struct dfs_fd *fd_get(int fd)
+struct dfs_file *fd_get(int fd)
 {
     struct dfs_fdtable *fdt;
 
@@ -328,22 +328,22 @@ struct dfs_fd *fd_get(int fd)
  */
 void fdt_fd_release(struct dfs_fdtable* fdt, int fd)
 {
-    struct dfs_fd *fd_slot = NULL;
+    struct dfs_file *fd_slot = NULL;
 
     RT_ASSERT(fdt != NULL);
 
-    dfs_fd_lock();
+    dfs_file_lock();
 
     if ((fd < 0) || (fd >= fdt->maxfd))
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return;
     }
 
     fd_slot = fdt->fds[fd];
     if (fd_slot == NULL)
     {
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return;
     }
     fdt->fds[fd] = NULL;
@@ -356,14 +356,14 @@ void fdt_fd_release(struct dfs_fdtable* fdt, int fd)
     /* clear this fd entry */
     if (fd_slot->ref_count == 0)
     {
-        struct dfs_fnode *vnode = fd_slot->vnode;
+        struct dfs_vnode *vnode = fd_slot->vnode;
         if (vnode)
         {
             vnode->ref_count--;
         }
         rt_free(fd_slot);
     }
-    dfs_fd_unlock();
+    dfs_file_unlock();
 }
 
 void fd_release(int fd)
@@ -379,7 +379,7 @@ rt_err_t sys_dup(int oldfd)
     int newfd = -1;
     struct dfs_fdtable *fdt = NULL;
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     fdt = dfs_fdtable_get();
     if ((oldfd < 0) || (oldfd >= fdt->maxfd))
@@ -399,7 +399,7 @@ rt_err_t sys_dup(int oldfd)
         fdt->fds[newfd]->ref_count++;
     }
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return newfd;
 }
 
@@ -419,7 +419,7 @@ int fd_is_open(const char *pathname)
     char *fullpath;
     unsigned int index;
     struct dfs_filesystem *fs;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
     struct dfs_fdtable *fdt;
 
     fdt = dfs_fdtable_get();
@@ -472,7 +472,7 @@ rt_err_t sys_dup2(int oldfd, int newfd)
     int ret = 0;
     int retfd = -1;
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     fdt = dfs_fdtable_get();
     if ((oldfd < 0) || (oldfd >= fdt->maxfd))
@@ -517,11 +517,11 @@ rt_err_t sys_dup2(int oldfd, int newfd)
     fdt->fds[newfd]->ref_count++;
     retfd = newfd;
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return retfd;
 }
 
-static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file)
+static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_file *file)
 {
     int fd = -1;
 
@@ -530,7 +530,7 @@ static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file
         return -1;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
 
     for(int index = 0; index < (int)fdt->maxfd; index++)
     {
@@ -541,12 +541,12 @@ static int fd_get_fd_index_form_fdt(struct dfs_fdtable *fdt, struct dfs_fd *file
         }
     }
 
-    dfs_fd_unlock();
+    dfs_file_unlock();
 
     return fd;
 }
 
-int fd_get_fd_index(struct dfs_fd *file)
+int fd_get_fd_index(struct dfs_file *file)
 {
     struct dfs_fdtable *fdt;
 
@@ -554,7 +554,7 @@ int fd_get_fd_index(struct dfs_fd *file)
     return fd_get_fd_index_form_fdt(fdt, file);
 }
 
-int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
+int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_file *file)
 {
     int retfd = -1;
 
@@ -567,7 +567,7 @@ int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
         return retfd;
     }
 
-    dfs_fd_lock();
+    dfs_file_lock();
     /* check old fd */
     if ((fd < 0) || (fd >= fdt->maxfd))
     {
@@ -583,11 +583,11 @@ int fd_associate(struct dfs_fdtable *fdt, int fd, struct dfs_fd *file)
     fdt->fds[fd] = file;
     retfd = fd;
 exit:
-    dfs_fd_unlock();
+    dfs_file_unlock();
     return retfd;
 }
 
-void fd_init(struct dfs_fd *fd)
+void fd_init(struct dfs_file *fd)
 {
     if (fd)
     {
@@ -826,7 +826,7 @@ int list_fd(void)
     rt_kprintf("-- ------  --- ----- ------\n");
     for (index = 0; index < (int)fd_table->maxfd; index++)
     {
-        struct dfs_fd *fd = fd_table->fds[index];
+        struct dfs_file *fd = fd_table->fds[index];
 
         if (fd && fd->vnode->fops)
         {
@@ -880,7 +880,7 @@ static int lsofp(int pid)
     rt_enter_critical();
     for (index = 0; index < (int)fd_table->maxfd; index++)
     {
-        struct dfs_fd *fd = fd_table->fds[index];
+        struct dfs_file *fd = fd_table->fds[index];
 
         if (fd && fd->vnode->fops)
         {
diff --git a/components/dfs/dfs_v2/src/dfs_file.c b/components/dfs/dfs_v2/src/dfs_file.c
index 56a28f5331669c5df39b079ab280a2229c66b31f..30dc0ac8bf0b74fa8553a10a33898dcfedea26c7 100644
--- a/components/dfs/dfs_v2/src/dfs_file.c
+++ b/components/dfs/dfs_v2/src/dfs_file.c
@@ -18,13 +18,13 @@
 
 #define DFS_FNODE_HASH_NR 128
 
-struct dfs_fnode_mgr
+struct dfs_vnode_mgr
 {
     struct rt_mutex lock;
     rt_list_t head[DFS_FNODE_HASH_NR];
 };
 
-static struct dfs_fnode_mgr dfs_fm;
+static struct dfs_vnode_mgr dfs_fm;
 
 void dfs_fm_lock(void)
 {
@@ -36,7 +36,7 @@ void dfs_fm_unlock(void)
     rt_mutex_release(&dfs_fm.lock);
 }
 
-void dfs_fnode_mgr_init(void)
+void dfs_vnode_mgr_init(void)
 {
     int i = 0;
 
@@ -61,9 +61,9 @@ static unsigned int bkdr_hash(const char *str)
     return (hash % DFS_FNODE_HASH_NR);
 }
 
-static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
+static struct dfs_vnode *dfs_vnode_find(const char *path, rt_list_t **hash_head)
 {
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int hash = bkdr_hash(path);
     rt_list_t *hh;
 
@@ -76,7 +76,7 @@ static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
 
     while (hh != &dfs_fm.head[hash])
     {
-        vnode = rt_container_of(hh, struct dfs_fnode, list);
+        vnode = rt_container_of(hh, struct dfs_vnode, list);
         if (rt_strcmp(path, vnode->fullpath) == 0)
         {
             /* found */
@@ -103,13 +103,13 @@ static struct dfs_fnode *dfs_fnode_find(const char *path, rt_list_t **hash_head)
 int dfs_file_is_open(const char *pathname)
 {
     char *fullpath = NULL;
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int ret = 0;
 
     fullpath = dfs_normalize_path(NULL, pathname);
 
     dfs_fm_lock();
-    vnode = dfs_fnode_find(fullpath, NULL);
+    vnode = dfs_vnode_find(fullpath, NULL);
     if (vnode)
     {
         ret = 1;
@@ -130,12 +130,12 @@ int dfs_file_is_open(const char *pathname)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
+int dfs_file_open(struct dfs_file *fd, const char *path, int flags)
 {
     struct dfs_filesystem *fs;
     char *fullpath;
     int result;
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     rt_list_t *hash_head;
 
     /* parameter check */
@@ -153,7 +153,7 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
 
     dfs_fm_lock();
     /* vnode find */
-    vnode = dfs_fnode_find(fullpath, &hash_head);
+    vnode = dfs_vnode_find(fullpath, &hash_head);
     if (vnode)
     {
         vnode->ref_count++;
@@ -173,7 +173,7 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
             return -ENOENT;
         }
 
-        vnode = rt_calloc(1, sizeof(struct dfs_fnode));
+        vnode = rt_calloc(1, sizeof(struct dfs_vnode));
         if (!vnode)
         {
             dfs_fm_unlock();
@@ -270,9 +270,9 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_close(struct dfs_fd *fd)
+int dfs_file_close(struct dfs_file *fd)
 {
-    struct dfs_fnode *vnode = NULL;
+    struct dfs_vnode *vnode = NULL;
     int result = 0;
 
     if (fd == NULL)
@@ -331,7 +331,7 @@ int dfs_file_close(struct dfs_fd *fd)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args)
+int dfs_file_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     if (fd == NULL)
     {
@@ -376,7 +376,7 @@ int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args)
  *
  * @return the actual read data bytes or 0 on end of file or failed.
  */
-int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len)
+int dfs_file_read(struct dfs_file *fd, void *buf, size_t len)
 {
     int result = 0;
 
@@ -407,7 +407,7 @@ int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len)
  *
  * @return the read dirent, others on failed.
  */
-int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes)
+int dfs_file_getdents(struct dfs_file *fd, struct dirent *dirp, size_t nbytes)
 {
     /* parameter check */
     if (fd == NULL)
@@ -490,7 +490,7 @@ __exit:
  *
  * @return the actual written data length.
  */
-int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len)
+int dfs_file_write(struct dfs_file *fd, const void *buf, size_t len)
 {
     if (fd == NULL)
     {
@@ -512,7 +512,7 @@ int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len)
  *
  * @return 0 on successful, -1 on failed.
  */
-int dfs_file_flush(struct dfs_fd *fd)
+int dfs_file_flush(struct dfs_file *fd)
 {
     if (fd == NULL)
         return -EINVAL;
@@ -531,7 +531,7 @@ int dfs_file_flush(struct dfs_fd *fd)
  *
  * @return the current position after seek.
  */
-int dfs_file_lseek(struct dfs_fd *fd, off_t offset)
+int dfs_file_lseek(struct dfs_file *fd, off_t offset)
 {
     int result;
 
@@ -703,7 +703,7 @@ __exit:
  *
  * @return the status of truncated.
  */
-int dfs_file_ftruncate(struct dfs_fd *fd, off_t length)
+int dfs_file_ftruncate(struct dfs_file *fd, off_t length)
 {
     int result;
 
@@ -723,7 +723,7 @@ int dfs_file_ftruncate(struct dfs_fd *fd, off_t length)
     return result;
 }
 
-int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2)
+int dfs_file_mmap2(struct dfs_file *fd, struct dfs_mmap2_args *mmap2)
 {
     int ret = 0;
 
@@ -752,7 +752,7 @@ int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2)
 
 void ls(const char *pathname)
 {
-    struct dfs_fd fd;
+    struct dfs_file fd;
     struct dirent dirent;
     struct stat stat;
     int length;
@@ -834,7 +834,7 @@ FINSH_FUNCTION_EXPORT(rm, remove files or directories);
 
 void cat(const char *filename)
 {
-    struct dfs_fd fd;
+    struct dfs_file fd;
     int length = 0;
     char buffer[81];
 
@@ -867,8 +867,8 @@ FINSH_FUNCTION_EXPORT(cat, print file);
 #define BUF_SZ  4096
 static void copyfile(const char *src, const char *dst)
 {
-    struct dfs_fd fd;
-    struct dfs_fd src_fd;
+    struct dfs_file fd;
+    struct dfs_file src_fd;
     rt_uint8_t *block_ptr;
     rt_int32_t read_bytes;
 
@@ -928,7 +928,7 @@ static void copydir(const char *src, const char *dst)
     struct dirent dirent;
     struct stat stat;
     int length;
-    struct dfs_fd cpfd;
+    struct dfs_file cpfd;
     if (dfs_file_open(&cpfd, src, O_DIRECTORY) < 0)
     {
         rt_kprintf("open %s failed\n", src);
diff --git a/components/dfs/dfs_v2/src/dfs_fs.c b/components/dfs/dfs_v2/src/dfs_fs.c
index 7724afc7bc40d44018ed0a5d3a98230d9abc045c..e9be89106801c1fb8301ec93a84a62a06b850ba1 100644
--- a/components/dfs/dfs_v2/src/dfs_fs.c
+++ b/components/dfs/dfs_v2/src/dfs_fs.c
@@ -271,7 +271,7 @@ int dfs_mount(const char   *device_name,
     /* Check if the path exists or not, raw APIs call, fixme */
     if ((strcmp(fullpath, "/") != 0) && (strcmp(fullpath, "/dev") != 0))
     {
-        struct dfs_fd fd;
+        struct dfs_file fd;
 
         fd_init(&fd);
         if (dfs_file_open(&fd, fullpath, O_RDONLY | O_DIRECTORY) < 0)
diff --git a/components/dfs/dfs_v2/src/dfs_posix.c b/components/dfs/dfs_v2/src/dfs_posix.c
index ce1a3329d3855bd6eac2cb1fa26d0344a5bdf6b0..8c37c4afe1d7824c02836ff9f4154fad33ef8f3a 100644
--- a/components/dfs/dfs_v2/src/dfs_posix.c
+++ b/components/dfs/dfs_v2/src/dfs_posix.c
@@ -36,7 +36,7 @@
 int open(const char *file, int flags, ...)
 {
     int fd, result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* allocate a fd */
     fd = fd_new();
@@ -89,7 +89,7 @@ RTM_EXPORT(creat);
 int close(int fd)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -132,7 +132,7 @@ ssize_t read(int fd, void *buf, size_t len)
 #endif
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fd);
@@ -172,7 +172,7 @@ ssize_t write(int fd, const void *buf, size_t len)
 #endif
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fd);
@@ -208,7 +208,7 @@ RTM_EXPORT(write);
 off_t lseek(int fd, off_t offset, int whence)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -342,7 +342,7 @@ RTM_EXPORT(stat);
  */
 int fstat(int fildes, struct stat *buf)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -370,7 +370,7 @@ RTM_EXPORT(fstat);
 int fsync(int fildes)
 {
     int ret;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -401,7 +401,7 @@ RTM_EXPORT(fsync);
 int fcntl(int fildes, int cmd, ...)
 {
     int ret = -1;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -467,7 +467,7 @@ RTM_EXPORT(ioctl);
 int ftruncate(int fd, off_t length)
 {
     int result;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = fd_get(fd);
     if (d == NULL)
@@ -531,7 +531,7 @@ RTM_EXPORT(statfs);
  */
 int fstatfs(int fildes, struct statfs *buf)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* get the fd */
     d = fd_get(fildes);
@@ -557,7 +557,7 @@ RTM_EXPORT(fstatfs);
 int mkdir(const char *path, mode_t mode)
 {
     int fd;
-    struct dfs_fd *d;
+    struct dfs_file *d;
     int result;
 
     fd = fd_new();
@@ -619,7 +619,7 @@ RTM_EXPORT(rmdir);
  */
 DIR *opendir(const char *name)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
     int fd, result;
     DIR *t;
 
@@ -675,7 +675,7 @@ RTM_EXPORT(opendir);
 struct dirent *readdir(DIR *d)
 {
     int result;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -722,7 +722,7 @@ RTM_EXPORT(readdir);
  */
 long telldir(DIR *d)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
     long result;
 
     fd = fd_get(d->fd);
@@ -748,7 +748,7 @@ RTM_EXPORT(telldir);
  */
 void seekdir(DIR *d, long offset)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -772,7 +772,7 @@ RTM_EXPORT(seekdir);
  */
 void rewinddir(DIR *d)
 {
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
@@ -799,7 +799,7 @@ RTM_EXPORT(rewinddir);
 int closedir(DIR *d)
 {
     int result;
-    struct dfs_fd *fd;
+    struct dfs_file *fd;
 
     fd = fd_get(d->fd);
     if (fd == NULL)
diff --git a/components/drivers/ipc/pipe.c b/components/drivers/ipc/pipe.c
index ccb953bc2300c2090a2e1c2a5ce16ce44af91597..1d8a41f00d6040c9e8c61d48eb2e03b4bb230a47 100644
--- a/components/drivers/ipc/pipe.c
+++ b/components/drivers/ipc/pipe.c
@@ -52,7 +52,7 @@ static resource_id_t id_mgr = RESOURCE_ID_INIT(RT_UNAMED_PIPE_NUMBER, resoure_id
  *           When the return value is -1, it means the file descriptor is invalid.
  *           When the return value is -RT_ENOMEM, it means insufficient memory allocation failed.
  */
-static int pipe_fops_open(struct dfs_fd *fd)
+static int pipe_fops_open(struct dfs_file *fd)
 {
     int rc = 0;
     rt_pipe_t *pipe;
@@ -99,7 +99,7 @@ __exit:
  *           When the return value is 0, it means the operation is successful.
  *           When the return value is -1, it means the file descriptor is invalid.
  */
-static int pipe_fops_close(struct dfs_fd *fd)
+static int pipe_fops_close(struct dfs_file *fd)
 {
     rt_device_t device;
     rt_pipe_t *pipe;
@@ -164,7 +164,7 @@ static int pipe_fops_close(struct dfs_fd *fd)
  *           When the return value is 0, it means the operation is successful.
  *           When the return value is -EINVAL, it means the command is invalid.
  */
-static int pipe_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
+static int pipe_fops_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     rt_pipe_t *pipe;
     int ret = 0;
@@ -200,7 +200,7 @@ static int pipe_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
  *           When the return value is 0, it means O_NONBLOCK is enabled and there is no thread that has the pipe open for writing.
  *           When the return value is -EAGAIN, it means there are no data to be read.
  */
-static int pipe_fops_read(struct dfs_fd *fd, void *buf, size_t count)
+static int pipe_fops_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int len = 0;
     rt_pipe_t *pipe;
@@ -254,7 +254,7 @@ out:
  *           When the return value is -EAGAIN, it means O_NONBLOCK is enabled and there are no space to be written.
  *           When the return value is -EPIPE, it means there is no thread that has the pipe open for reading.
  */
-static int pipe_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
+static int pipe_fops_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     int len;
     rt_pipe_t *pipe;
@@ -325,7 +325,7 @@ static int pipe_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
  *           POLLOUT means there is space to be written.
  *           POLLERR means there is no thread that occupied the pipe to open for reading.
  */
-static int pipe_fops_poll(struct dfs_fd *fd, rt_pollreq_t *req)
+static int pipe_fops_poll(struct dfs_file *fd, rt_pollreq_t *req)
 {
     int mask = 0;
     rt_pipe_t *pipe;
diff --git a/components/drivers/misc/rt_dev_bus.c b/components/drivers/misc/rt_dev_bus.c
index 5e858d17815e2000a52fb54ee4a31f71f5b7a0b4..d24b2b03b81606ae66ad630794d83c19579ae7d7 100644
--- a/components/drivers/misc/rt_dev_bus.c
+++ b/components/drivers/misc/rt_dev_bus.c
@@ -25,13 +25,13 @@
 #include <sys/ioctl.h>
 #include <dfs_file.h>
 
-static int bus_fops_open(struct dfs_fd *fd)
+static int bus_fops_open(struct dfs_file *fd)
 {
     LOG_D("bus fops open");
     return 0;
 }
 
-static int bus_fops_close(struct dfs_fd *fd)
+static int bus_fops_close(struct dfs_file *fd)
 {
     LOG_D("bus fops close");
     return 0;
diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index 582a6ed90a03e1af50570488581fcf30b044e9d0..1d78140015c479b9f57193bcf624e2439a908a8b 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -64,7 +64,7 @@ static rt_err_t serial_fops_rx_ind(rt_device_t dev, rt_size_t size)
 }
 
 /* fops for serial */
-static int serial_fops_open(struct dfs_fd *fd)
+static int serial_fops_open(struct dfs_file *fd)
 {
     rt_err_t ret = 0;
     rt_uint16_t flags = 0;
@@ -100,7 +100,7 @@ static int serial_fops_open(struct dfs_fd *fd)
     return ret;
 }
 
-static int serial_fops_close(struct dfs_fd *fd)
+static int serial_fops_close(struct dfs_file *fd)
 {
     rt_device_t device;
 
@@ -112,7 +112,7 @@ static int serial_fops_close(struct dfs_fd *fd)
     return 0;
 }
 
-static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
+static int serial_fops_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     rt_device_t device;
     int flags = (int)(rt_base_t)args;
@@ -135,7 +135,7 @@ static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
     return rt_device_control(device, cmd, args);
 }
 
-static int serial_fops_read(struct dfs_fd *fd, void *buf, size_t count)
+static int serial_fops_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int size = 0;
     rt_device_t device;
@@ -169,7 +169,7 @@ static int serial_fops_read(struct dfs_fd *fd, void *buf, size_t count)
     return size;
 }
 
-static int serial_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
+static int serial_fops_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     rt_device_t device;
 
@@ -177,7 +177,7 @@ static int serial_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
     return rt_device_write(device, -1, buf, count);
 }
 
-static int serial_fops_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int serial_fops_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int mask = 0;
     int flags = 0;
diff --git a/components/drivers/serial/serial_v2.c b/components/drivers/serial/serial_v2.c
index c88df7aabe948978878667686265bdadeeeec47f..68f9068601cc9359d35c973a756060ec51217621 100644
--- a/components/drivers/serial/serial_v2.c
+++ b/components/drivers/serial/serial_v2.c
@@ -43,7 +43,7 @@ static rt_err_t serial_fops_rx_ind(rt_device_t dev, rt_size_t size)
 }
 
 /* fops for serial */
-static int serial_fops_open(struct dfs_fd *fd)
+static int serial_fops_open(struct dfs_file *fd)
 {
     rt_err_t ret = 0;
     rt_uint16_t flags = 0;
@@ -79,7 +79,7 @@ static int serial_fops_open(struct dfs_fd *fd)
     return ret;
 }
 
-static int serial_fops_close(struct dfs_fd *fd)
+static int serial_fops_close(struct dfs_file *fd)
 {
     rt_device_t device;
 
@@ -91,7 +91,7 @@ static int serial_fops_close(struct dfs_fd *fd)
     return 0;
 }
 
-static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
+static int serial_fops_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     rt_device_t device;
     int flags = (int)(rt_base_t)args;
@@ -114,7 +114,7 @@ static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
     return rt_device_control(device, cmd, args);
 }
 
-static int serial_fops_read(struct dfs_fd *fd, void *buf, size_t count)
+static int serial_fops_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int size = 0;
     rt_device_t device;
@@ -139,7 +139,7 @@ static int serial_fops_read(struct dfs_fd *fd, void *buf, size_t count)
     return size;
 }
 
-static int serial_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
+static int serial_fops_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     rt_device_t device;
 
@@ -147,7 +147,7 @@ static int serial_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
     return rt_device_write(device, -1, buf, count);
 }
 
-static int serial_fops_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int serial_fops_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int mask = 0;
     int flags = 0;
diff --git a/components/drivers/tty/include/tty_ldisc.h b/components/drivers/tty/include/tty_ldisc.h
index 919805f64570dd88cdce6e1f887d86bb4a096108..619bca6dec37b3392d315d720e62cd18c8f09e5f 100644
--- a/components/drivers/tty/include/tty_ldisc.h
+++ b/components/drivers/tty/include/tty_ldisc.h
@@ -23,16 +23,16 @@ struct tty_ldisc_ops
     char    *name;
     int num;
 
-    int (*open)     (struct dfs_fd *fd);
+    int (*open)     (struct dfs_file *fd);
     int (*close)    (struct tty_struct *tty);
-    int (*ioctl)    (struct dfs_fd *fd, int cmd, void *args);
-    int (*read)     (struct dfs_fd *fd, void *buf, size_t count);
-    int (*write)    (struct dfs_fd *fd, const void *buf, size_t count);
-    int (*flush)    (struct dfs_fd *fd);
-    int (*lseek)    (struct dfs_fd *fd, off_t offset);
-    int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, uint32_t count);
-
-    int (*poll)     (struct dfs_fd *fd, struct rt_pollreq *req);
+    int (*ioctl)    (struct dfs_file *fd, int cmd, void *args);
+    int (*read)     (struct dfs_file *fd, void *buf, size_t count);
+    int (*write)    (struct dfs_file *fd, const void *buf, size_t count);
+    int (*flush)    (struct dfs_file *fd);
+    int (*lseek)    (struct dfs_file *fd, off_t offset);
+    int (*getdents) (struct dfs_file *fd, struct dirent *dirp, uint32_t count);
+
+    int (*poll)     (struct dfs_file *fd, struct rt_pollreq *req);
     void (*set_termios) (struct tty_struct *tty, struct termios *old);
     int (*receive_buf) (struct tty_struct *tty,char *cp, int count);
 
diff --git a/components/drivers/tty/n_tty.c b/components/drivers/tty/n_tty.c
index ba27ae134b8ee0c069dbbc097a0f38b3e18ef40c..00448dd6369bdec0b07d9f04333e4f69c500a379 100644
--- a/components/drivers/tty/n_tty.c
+++ b/components/drivers/tty/n_tty.c
@@ -1112,7 +1112,7 @@ void console_ldata_init(struct tty_struct *tty)
     return;
 }
 
-static int n_tty_open(struct dfs_fd *fd)
+static int n_tty_open(struct dfs_file *fd)
 {
     int ret = 0;
     struct n_tty_data *ldata = RT_NULL;
@@ -1332,7 +1332,7 @@ static int n_tty_close(struct tty_struct *tty)
     return ret;
 }
 
-static int n_tty_ioctl(struct dfs_fd *fd, int cmd, void *args)
+static int n_tty_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     int ret = 0;
     struct tty_struct *real_tty = RT_NULL;
@@ -1845,7 +1845,7 @@ static int job_control(struct tty_struct *tty)
     return __tty_check_change(tty, SIGTTIN);
 }
 
-static int n_tty_read(struct dfs_fd *fd, void *buf, size_t count)
+static int n_tty_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int level = 0;
     char *b = (char *)buf;
@@ -1906,7 +1906,7 @@ static int n_tty_read(struct dfs_fd *fd, void *buf, size_t count)
     return retval;
 }
 
-static int n_tty_write(struct dfs_fd *fd, const void *buf, size_t count)
+static int n_tty_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     int retval = 0;
     char *b = (char *)buf;
@@ -1987,22 +1987,22 @@ break_out:
     return retval;
 }
 
-static int n_tty_flush(struct dfs_fd *fd)
+static int n_tty_flush(struct dfs_file *fd)
 {
     return 0;
 }
 
-static int n_tty_lseek(struct dfs_fd *fd, off_t offset)
+static int n_tty_lseek(struct dfs_file *fd, off_t offset)
 {
     return 0;
 }
 
-static int n_tty_getdents(struct dfs_fd *fd, struct dirent *dirp, uint32_t count)
+static int n_tty_getdents(struct dfs_file *fd, struct dirent *dirp, uint32_t count)
 {
     return 0;
 }
 
-static int n_tty_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int n_tty_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     rt_base_t level = 0;
     int mask = POLLOUT;
diff --git a/components/drivers/tty/pty.c b/components/drivers/tty/pty.c
index 64e3a41df182be358ecfcf6c9477d5cf1f8cb908..0db50360bd7824e7f50f440485f0e77fe885e5ba 100644
--- a/components/drivers/tty/pty.c
+++ b/components/drivers/tty/pty.c
@@ -175,7 +175,7 @@ static rt_err_t  pty_device_control(rt_device_t dev, int cmd, void *args)
     return -ENOIOCTLCMD;
 }
 
-static int ptmx_open(struct dfs_fd *fd)
+static int ptmx_open(struct dfs_file *fd)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
diff --git a/components/drivers/tty/tty.c b/components/drivers/tty/tty.c
index 933d5f028bc35b4e49f033bf77540c07d1d3a82f..1573b13a7b54b66842b095ca05152515d6ec2b3f 100644
--- a/components/drivers/tty/tty.c
+++ b/components/drivers/tty/tty.c
@@ -210,7 +210,7 @@ int tty_check_change(struct tty_struct *tty)
     return __tty_check_change(tty, SIGTTOU);
 }
 
-static int tty_open(struct dfs_fd *fd)
+static int tty_open(struct dfs_file *fd)
 {
     int ret = 0;
     int noctty = 0;
@@ -251,7 +251,7 @@ static int tty_open(struct dfs_fd *fd)
     return ret;
 }
 
-static int tty_close(struct dfs_fd *fd)
+static int tty_close(struct dfs_file *fd)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
@@ -304,7 +304,7 @@ static int tiocsctty(struct tty_struct *tty, int arg)
     return 0;
 }
 
-static int tty_ioctl(struct dfs_fd *fd, int cmd, void *args)
+static int tty_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
@@ -335,7 +335,7 @@ static int tty_ioctl(struct dfs_fd *fd, int cmd, void *args)
     return ret;
 }
 
-static int tty_read(struct dfs_fd *fd, void *buf, size_t count)
+static int tty_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
@@ -351,7 +351,7 @@ static int tty_read(struct dfs_fd *fd, void *buf, size_t count)
     return ret;
 }
 
-static int tty_write(struct dfs_fd *fd, const void *buf, size_t count)
+static int tty_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
@@ -367,7 +367,7 @@ static int tty_write(struct dfs_fd *fd, const void *buf, size_t count)
     return ret;
 }
 
-static int tty_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+static int tty_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int ret = 0;
     struct tty_struct *tty = RT_NULL;
diff --git a/components/fal/src/fal_rtt.c b/components/fal/src/fal_rtt.c
index a40832f31c98164b3f4462a8c494b5123bc95be7..89dcdf47228b100bc924845f5b7032be756e5605 100644
--- a/components/fal/src/fal_rtt.c
+++ b/components/fal/src/fal_rtt.c
@@ -406,7 +406,7 @@ const static struct rt_device_ops char_dev_ops =
 #include <sys/statfs.h> /* statfs() */
 
 /* RT-Thread device filesystem interface */
-static int char_dev_fopen(struct dfs_fd *fd)
+static int char_dev_fopen(struct dfs_file *fd)
 {
     struct fal_char_device *part = (struct fal_char_device *) fd->vnode->data;
 
@@ -429,7 +429,7 @@ static int char_dev_fopen(struct dfs_fd *fd)
     return RT_EOK;
 }
 
-static int char_dev_fread(struct dfs_fd *fd, void *buf, size_t count)
+static int char_dev_fread(struct dfs_file *fd, void *buf, size_t count)
 {
     int ret = 0;
     struct fal_char_device *part = (struct fal_char_device *) fd->vnode->data;
@@ -449,7 +449,7 @@ static int char_dev_fread(struct dfs_fd *fd, void *buf, size_t count)
     return ret;
 }
 
-static int char_dev_fwrite(struct dfs_fd *fd, const void *buf, size_t count)
+static int char_dev_fwrite(struct dfs_file *fd, const void *buf, size_t count)
 {
     int ret = 0;
     struct fal_char_device *part = (struct fal_char_device *) fd->vnode->data;
diff --git a/components/libc/posix/io/poll/poll.c b/components/libc/posix/io/poll/poll.c
index 9fcf0f2063ffc3c23a4aaebced3adee69a8bec65..3a94ee9abd9a303c9009eb594e6bac1936864e7b 100644
--- a/components/libc/posix/io/poll/poll.c
+++ b/components/libc/posix/io/poll/poll.c
@@ -122,7 +122,7 @@ static int do_pollfd(struct pollfd *pollfd, rt_pollreq_t *req)
 
     if (fd >= 0)
     {
-        struct dfs_fd *f = fd_get(fd);
+        struct dfs_file *f = fd_get(fd);
         mask = POLLNVAL;
 
         if (f)
diff --git a/components/lwp/lwp.c b/components/lwp/lwp.c
index 0af0399cc670e4e891fb7a663cf90fc785d48656..375ac9b317e76875a4f509a8b34e49ed8818d776 100644
--- a/components/lwp/lwp.c
+++ b/components/lwp/lwp.c
@@ -1059,7 +1059,7 @@ void lwp_cleanup(struct rt_thread *tid)
 
 static void lwp_copy_stdio_fdt(struct rt_lwp *lwp)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
     struct dfs_fdtable *lwp_fdt;
 
     lwp_fdt = &lwp->fdt;
diff --git a/components/lwp/lwp_ipc.c b/components/lwp/lwp_ipc.c
index f6219479b9bbd6924a19ff618ea6971866a99ea3..97d29ce98d3d08ea6abbf999b00eefd2a8a13498 100644
--- a/components/lwp/lwp_ipc.c
+++ b/components/lwp/lwp_ipc.c
@@ -783,7 +783,7 @@ static int lwp_fd_new(int fdt_type)
     return fdt_fd_new(fdt);
 }
 
-static struct dfs_fd *lwp_fd_get(int fdt_type, int fd)
+static struct dfs_file *lwp_fd_get(int fdt_type, int fd)
 {
     struct dfs_fdtable *fdt;
 
@@ -830,7 +830,7 @@ static int _chfd_alloc(int fdt_type)
 
 static void _chfd_free(int fd, int fdt_type)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = lwp_fd_get(fdt_type, fd);
     if (d == RT_NULL)
@@ -841,7 +841,7 @@ static void _chfd_free(int fd, int fdt_type)
 }
 
 /* for fops */
-static int channel_fops_poll(struct dfs_fd *file, struct rt_pollreq *req)
+static int channel_fops_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     int mask = POLLOUT;
     rt_channel_t ch;
@@ -859,7 +859,7 @@ static int channel_fops_poll(struct dfs_fd *file, struct rt_pollreq *req)
     return mask;
 }
 
-static int channel_fops_close(struct dfs_fd *file)
+static int channel_fops_close(struct dfs_file *file)
 {
     rt_channel_t ch;
     rt_base_t level;
@@ -902,7 +902,7 @@ int lwp_channel_open(int fdt_type, const char *name, int flags)
 {
     int fd;
     rt_channel_t ch = RT_NULL;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     fd = _chfd_alloc(fdt_type);     /* allocate an IPC channel descriptor */
     if (fd == -1)
@@ -910,7 +910,7 @@ int lwp_channel_open(int fdt_type, const char *name, int flags)
         goto quit;
     }
     d = lwp_fd_get(fdt_type, fd);
-    d->vnode = (struct dfs_fnode *)rt_malloc(sizeof(struct dfs_fnode));
+    d->vnode = (struct dfs_vnode *)rt_malloc(sizeof(struct dfs_vnode));
     if (!d->vnode)
     {
         _chfd_free(fd, fdt_type);
@@ -921,7 +921,7 @@ int lwp_channel_open(int fdt_type, const char *name, int flags)
     ch = rt_raw_channel_open(name, flags);
     if (ch)
     {
-        rt_memset(d->vnode, 0, sizeof(struct dfs_fnode));
+        rt_memset(d->vnode, 0, sizeof(struct dfs_vnode));
         rt_list_init(&d->vnode->list);
         d->vnode->type = FT_USER;
         d->vnode->path = NULL;
@@ -934,7 +934,7 @@ int lwp_channel_open(int fdt_type, const char *name, int flags)
         d->pos = 0;
         d->vnode->ref_count = 1;
 
-        /* set socket to the data of dfs_fd */
+        /* set socket to the data of dfs_file */
         d->vnode->data = (void *)ch;
     }
     else
@@ -950,7 +950,7 @@ quit:
 
 static rt_channel_t fd_2_channel(int fdt_type, int fd)
 {
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     d = lwp_fd_get(fdt_type, fd);
     if (d)
@@ -969,8 +969,8 @@ static rt_channel_t fd_2_channel(int fdt_type, int fd)
 rt_err_t lwp_channel_close(int fdt_type, int fd)
 {
     rt_channel_t ch;
-    struct dfs_fd *d;
-    struct dfs_fnode *vnode;
+    struct dfs_file *d;
+    struct dfs_vnode *vnode;
 
     d = lwp_fd_get(fdt_type, fd);
     if (!d)
diff --git a/components/lwp/lwp_pid.c b/components/lwp/lwp_pid.c
index d22c3f3d68763a6cd11258c84078c52fa51490f9..d015c76cab90dd614d570d52f5197e6b57f53e2e 100644
--- a/components/lwp/lwp_pid.c
+++ b/components/lwp/lwp_pid.c
@@ -135,7 +135,7 @@ static void __exit_files(struct rt_lwp *lwp)
 
     while (fd >= 0)
     {
-        struct dfs_fd *d;
+        struct dfs_file *d;
 
         d = lwp->fdt.fds[fd];
         if (d)
diff --git a/components/lwp/lwp_syscall.c b/components/lwp/lwp_syscall.c
index 77eb77f556d17fcd2ad0dc38bdc3100f57b0b5b2..8d07a9388d4ecc10acd8cf0979f91c71adb08870 100644
--- a/components/lwp/lwp_syscall.c
+++ b/components/lwp/lwp_syscall.c
@@ -1636,12 +1636,12 @@ static int lwp_copy_files(struct rt_lwp *dst, struct rt_lwp *src)
     dst_fdt->fds = rt_calloc(src_fdt->maxfd, sizeof(void *));
     if (dst_fdt->fds)
     {
-        struct dfs_fd *d_s;
+        struct dfs_file *d_s;
         int i;
 
         dst_fdt->maxfd = src_fdt->maxfd;
 
-        dfs_fd_lock();
+        dfs_file_lock();
         /* dup files */
         for (i = 0; i < src_fdt->maxfd; i++)
         {
@@ -1652,7 +1652,7 @@ static int lwp_copy_files(struct rt_lwp *dst, struct rt_lwp *src)
                 d_s->ref_count++;
             }
         }
-        dfs_fd_unlock();
+        dfs_file_unlock();
         return 0;
     }
     return -RT_ERROR;
@@ -3729,7 +3729,7 @@ struct libc_dirent {
 sysret_t sys_getdents(int fd, struct libc_dirent *dirp, size_t nbytes)
 {
     int ret = -1;
-    struct dfs_fd *dfs_fd;
+    struct dfs_file *file;
     size_t cnt = (nbytes / sizeof(struct libc_dirent));
     size_t rtt_nbytes = 0;
     struct dirent *rtt_dirp;
@@ -3751,8 +3751,8 @@ sysret_t sys_getdents(int fd, struct libc_dirent *dirp, size_t nbytes)
     {
         return -ENOMEM;
     }
-    dfs_fd = fd_get(fd);
-    ret = dfs_file_getdents(dfs_fd, rtt_dirp, rtt_nbytes);
+    file = fd_get(fd);
+    ret = dfs_file_getdents(file, rtt_dirp, rtt_nbytes);
     if (ret > 0)
     {
         size_t i = 0;
@@ -4064,9 +4064,9 @@ sysret_t sys_getrlimit(unsigned int resource, unsigned long rlim[2])
         {
             struct dfs_fdtable *fdt = dfs_fdtable_get();
 
-            dfs_fd_lock();
+            dfs_file_lock();
             rlim[0] = fdt->maxfd;
-            dfs_fd_unlock();
+            dfs_file_unlock();
             rlim[1] = DFS_FD_MAX;
             ret = 0;
         }
@@ -4161,7 +4161,7 @@ ssize_t sys_readlink(char* path, char *buf, size_t bufsz)
     size_t len, copy_len;
     int err, rtn;
     int fd = -1;
-    struct dfs_fd *d;
+    struct dfs_file *d;
     char *copy_path;
 
     len = lwp_user_strlen(path, &err);
@@ -4565,18 +4565,20 @@ sysret_t sys_mq_close(mqd_t mqd)
 
 rt_weak sysret_t sys_cacheflush(void *addr, int size, int cache)
 {
-    if (addr < addr + size &&
-        (size_t)addr >= USER_VADDR_START &&
-        (size_t)addr + size < USER_VADDR_TOP)
+    if (((size_t)addr < (size_t)addr + size) &&
+        ((size_t)addr >= USER_VADDR_START) &&
+        ((size_t)addr + size < USER_VADDR_TOP))
     {
         if ((cache & DCACHE))
         {
             rt_hw_cpu_dcache_clean_and_invalidate(addr, size);
         }
+
         if ((cache & ICACHE))
         {
             rt_hw_cpu_icache_invalidate(addr, size);
         }
+
         return 0;
     }
     return -EFAULT;
diff --git a/components/lwp/lwp_user_mm.c b/components/lwp/lwp_user_mm.c
index 09cc47dd2bb7a6379efea9dfeeabfee57feca646..068073ec0b80cb506e40b62f6c3315ae43bd64f3 100644
--- a/components/lwp/lwp_user_mm.c
+++ b/components/lwp/lwp_user_mm.c
@@ -39,10 +39,12 @@ static void _init_lwp_objs(struct rt_lwp_objs *lwp_objs, rt_aspace_t aspace);
 int lwp_user_space_init(struct rt_lwp *lwp, rt_bool_t is_fork)
 {
     int err = -RT_ENOMEM;
+
     lwp->lwp_obj = rt_malloc(sizeof(struct rt_lwp_objs));
-    _init_lwp_objs(lwp->lwp_obj, lwp->aspace);
     if (lwp->lwp_obj)
     {
+        _init_lwp_objs(lwp->lwp_obj, lwp->aspace);
+
         err = arch_user_space_init(lwp);
         if (!is_fork && err == RT_EOK)
         {
@@ -52,6 +54,7 @@ int lwp_user_space_init(struct rt_lwp *lwp, rt_bool_t is_fork)
                                 MMU_MAP_U_RWCB, 0, &lwp->lwp_obj->mem_obj, 0);
         }
     }
+
     return err;
 }
 
@@ -167,18 +170,21 @@ static void _user_do_page_fault(struct rt_varea *varea,
 
 static void _init_lwp_objs(struct rt_lwp_objs *lwp_objs, rt_aspace_t aspace)
 {
-    /**
-     * @brief one lwp_obj represent an base layout of page based memory in user space
-     * This is useful on duplication. Where we only have a (lwp_objs and offset) to
-     * provide identical memory. This is implemented by lwp_objs->source.
-     */
-    lwp_objs->source = NULL;
-    lwp_objs->mem_obj.get_name = user_get_name;
-    lwp_objs->mem_obj.hint_free = NULL;
-    lwp_objs->mem_obj.on_page_fault = _user_do_page_fault;
-    lwp_objs->mem_obj.on_page_offload = rt_mm_dummy_mapper.on_page_offload;
-    lwp_objs->mem_obj.on_varea_open = rt_mm_dummy_mapper.on_varea_open;
-    lwp_objs->mem_obj.on_varea_close = rt_mm_dummy_mapper.on_varea_close;
+    if (lwp_objs)
+    {
+        /**
+         * @brief one lwp_obj represent an base layout of page based memory in user space
+         * This is useful on duplication. Where we only have a (lwp_objs and offset) to
+         * provide identical memory. This is implemented by lwp_objs->source.
+         */
+        lwp_objs->source = NULL;
+        lwp_objs->mem_obj.get_name = user_get_name;
+        lwp_objs->mem_obj.hint_free = NULL;
+        lwp_objs->mem_obj.on_page_fault = _user_do_page_fault;
+        lwp_objs->mem_obj.on_page_offload = rt_mm_dummy_mapper.on_page_offload;
+        lwp_objs->mem_obj.on_varea_open = rt_mm_dummy_mapper.on_varea_open;
+        lwp_objs->mem_obj.on_varea_close = rt_mm_dummy_mapper.on_varea_close;
+    }
 }
 
 static void *_lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size,
@@ -206,8 +212,8 @@ static void *_lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size,
 
 int lwp_unmap_user(struct rt_lwp *lwp, void *va)
 {
-    int err;
-    err = rt_aspace_unmap(lwp->aspace, va);
+    int err = rt_aspace_unmap(lwp->aspace, va);
+
     return err;
 }
 
@@ -525,7 +531,7 @@ void *lwp_mmap2(void *addr, size_t length, int prot, int flags, int fd,
     }
     else
     {
-        struct dfs_fd *d;
+        struct dfs_file *d;
 
         d = fd_get(fd);
         if (d && d->vnode->type == FT_DEVICE)
diff --git a/components/net/sal/dfs_net/dfs_net.c b/components/net/sal/dfs_net/dfs_net.c
index 2aded9fcd80f60003dffdb54dea020965c4c4247..bb7176f4360b8471761000baacd0023b64f5ffe1 100644
--- a/components/net/sal/dfs_net/dfs_net.c
+++ b/components/net/sal/dfs_net/dfs_net.c
@@ -21,18 +21,18 @@
 int dfs_net_getsocket(int fd)
 {
     int socket;
-    struct dfs_fd *_dfs_fd;
+    struct dfs_file *file;
 
-    _dfs_fd = fd_get(fd);
-    if (_dfs_fd == NULL) return -1;
+    file = fd_get(fd);
+    if (file == NULL) return -1;
 
-    if (_dfs_fd->vnode->type != FT_SOCKET) socket = -1;
-    else socket = (int)(size_t)_dfs_fd->vnode->data;
+    if (file->vnode->type != FT_SOCKET) socket = -1;
+    else socket = (int)(size_t)file->vnode->data;
 
     return socket;
 }
 
-static int dfs_net_ioctl(struct dfs_fd* file, int cmd, void* args)
+static int dfs_net_ioctl(struct dfs_file* file, int cmd, void* args)
 {
     int ret;
     int socket = (int)(size_t)file->vnode->data;
@@ -46,7 +46,7 @@ static int dfs_net_ioctl(struct dfs_fd* file, int cmd, void* args)
     return ret;
 }
 
-static int dfs_net_read(struct dfs_fd* file, void *buf, size_t count)
+static int dfs_net_read(struct dfs_file* file, void *buf, size_t count)
 {
     int ret;
     int socket = (int)(size_t)file->vnode->data;
@@ -60,11 +60,11 @@ static int dfs_net_read(struct dfs_fd* file, void *buf, size_t count)
     return ret;
 }
 
-static int dfs_net_write(struct dfs_fd *file, const void *buf, size_t count)
+static int dfs_net_write(struct dfs_file *file, const void *buf, size_t count)
 {
     int ret;
     int socket = (int)(size_t)file->vnode->data;
-    
+
     ret = sal_sendto(socket, buf, count, 0, NULL, 0);
     if (ret < 0)
     {
@@ -73,7 +73,7 @@ static int dfs_net_write(struct dfs_fd *file, const void *buf, size_t count)
     }
     return ret;
 }
-static int dfs_net_close(struct dfs_fd* file)
+static int dfs_net_close(struct dfs_file* file)
 {
     int socket;
     int ret = 0;
@@ -86,9 +86,9 @@ static int dfs_net_close(struct dfs_fd* file)
     return ret;
 }
 
-static int dfs_net_poll(struct dfs_fd *file, struct rt_pollreq *req)
+static int dfs_net_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
-    extern int sal_poll(struct dfs_fd *file, struct rt_pollreq *req);
+    extern int sal_poll(struct dfs_file *file, struct rt_pollreq *req);
 
     return sal_poll(file, req);
 }
diff --git a/components/net/sal/impl/af_inet_at.c b/components/net/sal/impl/af_inet_at.c
index 30c5324447e51ebe5d733ca1f8151e7e27b4611c..4e94d1e96c40bd650e627bf8d47ec54a95750456 100644
--- a/components/net/sal/impl/af_inet_at.c
+++ b/components/net/sal/impl/af_inet_at.c
@@ -25,7 +25,7 @@
 #ifdef SAL_USING_AT
 
 #ifdef SAL_USING_POSIX
-static int at_poll(struct dfs_fd *file, struct rt_pollreq *req)
+static int at_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     int mask = 0;
     struct at_socket *sock;
diff --git a/components/net/sal/impl/af_inet_lwip.c b/components/net/sal/impl/af_inet_lwip.c
index 52c1c2cb7d5d798122e79182e851452ce80e3ad6..37da37b1379e5756dce05945d94a407b26444ecf 100644
--- a/components/net/sal/impl/af_inet_lwip.c
+++ b/components/net/sal/impl/af_inet_lwip.c
@@ -243,7 +243,7 @@ int inet_ioctlsocket(int socket, long cmd, void *arg)
 }
 
 #ifdef SAL_USING_POSIX
-static int inet_poll(struct dfs_fd *file, struct rt_pollreq *req)
+static int inet_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     int mask = 0;
     struct lwip_sock *sock;
diff --git a/components/net/sal/include/sal_low_lvl.h b/components/net/sal/include/sal_low_lvl.h
index 95f984cca8796e5d0f5481de1e27f13d77b3d027..1b1959a3e9e194f3d05cd28fd1b6c6aa6069e70b 100644
--- a/components/net/sal/include/sal_low_lvl.h
+++ b/components/net/sal/include/sal_low_lvl.h
@@ -80,7 +80,7 @@ struct sal_socket_ops
     int (*getsockname)(int s, struct sockaddr *name, socklen_t *namelen);
     int (*ioctlsocket)(int s, long cmd, void *arg);
 #ifdef SAL_USING_POSIX
-    int (*poll)       (struct dfs_fd *file, struct rt_pollreq *req);
+    int (*poll)       (struct dfs_file *file, struct rt_pollreq *req);
 #endif
 };
 
diff --git a/components/net/sal/socket/net_sockets.c b/components/net/sal/socket/net_sockets.c
index e10ffef9b0214f2915fa27509389d466e2c1690f..ed8a6c6b1d51f0f26121cb00585b4f9b7ae387bd 100644
--- a/components/net/sal/socket/net_sockets.c
+++ b/components/net/sal/socket/net_sockets.c
@@ -26,7 +26,7 @@ int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
     {
         /* this is a new socket, create it in file system fd */
         int fd;
-        struct dfs_fd *d;
+        struct dfs_file *d;
 
         /* allocate a fd */
         fd = fd_new();
@@ -41,7 +41,7 @@ int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
         if(d)
         {
             /* this is a socket fd */
-            d->vnode = (struct dfs_fnode *)rt_malloc(sizeof(struct dfs_fnode));
+            d->vnode = (struct dfs_vnode *)rt_malloc(sizeof(struct dfs_vnode));
             if (!d->vnode)
             {
                 /* release fd */
@@ -49,7 +49,7 @@ int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
                 rt_set_errno(-ENOMEM);
                 return -1;
             }
-            rt_memset(d->vnode, 0, sizeof(struct dfs_fnode));
+            rt_memset(d->vnode, 0, sizeof(struct dfs_vnode));
             rt_list_init(&d->vnode->list);
 
             d->vnode->type = FT_SOCKET;
@@ -61,7 +61,7 @@ int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
             d->vnode->size = 0;
             d->pos = 0;
 
-            /* set socket to the data of dfs_fd */
+            /* set socket to the data of dfs_file */
             d->vnode->data = (void *)(size_t)new_socket;
 
             return fd;
@@ -99,7 +99,7 @@ int shutdown(int s, int how)
 {
     int error = 0;
     int socket = -1;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     socket = dfs_net_getsocket(s);
     if (socket < 0)
@@ -227,7 +227,7 @@ int socket(int domain, int type, int protocol)
     /* create a BSD socket */
     int fd;
     int socket;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     /* allocate a fd */
     fd = fd_new();
@@ -238,7 +238,7 @@ int socket(int domain, int type, int protocol)
         return -1;
     }
     d = fd_get(fd);
-    d->vnode = (struct dfs_fnode *)rt_malloc(sizeof(struct dfs_fnode));
+    d->vnode = (struct dfs_vnode *)rt_malloc(sizeof(struct dfs_vnode));
     if (!d->vnode)
     {
         /* release fd */
@@ -254,11 +254,11 @@ int socket(int domain, int type, int protocol)
     }
 #endif /* SAL_USING_AF_UNIX */
 
-    /* create socket  and then put it to the dfs_fd */
+    /* create socket  and then put it to the dfs_file */
     socket = sal_socket(domain, type, protocol);
     if (socket >= 0)
     {
-        rt_memset(d->vnode, 0, sizeof(struct dfs_fnode));
+        rt_memset(d->vnode, 0, sizeof(struct dfs_vnode));
         rt_list_init(&d->vnode->list);
         /* this is a socket fd */
         d->vnode->type = FT_SOCKET;
@@ -271,7 +271,7 @@ int socket(int domain, int type, int protocol)
         d->vnode->size = 0;
         d->pos = 0;
 
-        /* set socket to the data of dfs_fd */
+        /* set socket to the data of dfs_file */
         d->vnode->data = (void *)(size_t)socket;
     }
     else
@@ -291,7 +291,7 @@ int closesocket(int s)
 {
     int error = 0;
     int socket = -1;
-    struct dfs_fd *d;
+    struct dfs_file *d;
 
     socket = dfs_net_getsocket(s);
     if (socket < 0)
diff --git a/components/net/sal/src/sal_socket.c b/components/net/sal/src/sal_socket.c
index d1f9f645e629fcd16867b7ff7b458aef91597278..136a8428dab7bdf4101a2d28a079364a4a93c140 100644
--- a/components/net/sal/src/sal_socket.c
+++ b/components/net/sal/src/sal_socket.c
@@ -1062,7 +1062,7 @@ int sal_ioctlsocket(int socket, long cmd, void *arg)
             addr = (struct sockaddr *)&(ifr->ifr_ifru.ifru_addr);
             sal_sockaddr_to_ipaddr(addr,&input_ipaddr);
             netdev_set_ipaddr(sock->netdev,&input_ipaddr);
-            return 0;    
+            return 0;
 
         case SIOCGIFNETMASK:
             addr_in = (struct sockaddr_in *)&(ifr->ifr_ifru.ifru_netmask);
@@ -1079,7 +1079,7 @@ int sal_ioctlsocket(int socket, long cmd, void *arg)
             addr = (struct sockaddr *)&(ifr->ifr_ifru.ifru_netmask);
             sal_sockaddr_to_ipaddr(addr,&input_ipaddr);
             netdev_set_netmask(sock->netdev,&input_ipaddr);
-            return 0;            
+            return 0;
 
         case SIOCGIFHWADDR:
             addr = (struct sockaddr *)&(ifr->ifr_ifru.ifru_hwaddr);
@@ -1088,7 +1088,7 @@ int sal_ioctlsocket(int socket, long cmd, void *arg)
 
         case SIOCGIFMTU:
             ifr->ifr_ifru.ifru_mtu = sock->netdev->mtu;
-            return 0;            
+            return 0;
 
         default:
             break;
@@ -1098,7 +1098,7 @@ int sal_ioctlsocket(int socket, long cmd, void *arg)
 }
 
 #ifdef SAL_USING_POSIX
-int sal_poll(struct dfs_fd *file, struct rt_pollreq *req)
+int sal_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     struct sal_socket *sock;
     struct sal_proto_family *pf;
diff --git a/components/utilities/rt-link/src/rtlink_dev.c b/components/utilities/rt-link/src/rtlink_dev.c
index db94e93de34f4f1d8a6df203a1bc7c8ed00214a2..ab21004ef9de6ee569a63759b52bc7e894ccf8cb 100644
--- a/components/utilities/rt-link/src/rtlink_dev.c
+++ b/components/utilities/rt-link/src/rtlink_dev.c
@@ -25,7 +25,7 @@
 #include <sys/statfs.h>
 #include <poll.h>
 
-int rtlink_fops_open(struct dfs_fd *fd)
+int rtlink_fops_open(struct dfs_file *fd)
 {
     rt_uint16_t flags = 0;
     rt_device_t device;
@@ -58,7 +58,7 @@ int rtlink_fops_open(struct dfs_fd *fd)
     return rt_device_open(device, flags);
 }
 
-int rtlink_fops_close(struct dfs_fd *fd)
+int rtlink_fops_close(struct dfs_file *fd)
 {
     rt_device_t device;
     device = (rt_device_t)fd->vnode->data;
@@ -67,7 +67,7 @@ int rtlink_fops_close(struct dfs_fd *fd)
     return rt_device_close(device);
 }
 
-int rtlink_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
+int rtlink_fops_ioctl(struct dfs_file *fd, int cmd, void *args)
 {
     rt_device_t device;
     device = (rt_device_t)fd->vnode->data;
@@ -82,7 +82,7 @@ int rtlink_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
     }
 }
 
-int rtlink_fops_read(struct dfs_fd *fd, void *buf, size_t count)
+int rtlink_fops_read(struct dfs_file *fd, void *buf, size_t count)
 {
     int size = 0;
     rt_device_t device;
@@ -96,7 +96,7 @@ int rtlink_fops_read(struct dfs_fd *fd, void *buf, size_t count)
     return size;
 }
 
-int rtlink_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
+int rtlink_fops_write(struct dfs_file *fd, const void *buf, size_t count)
 {
     int size = 0;
     rt_device_t device;
@@ -110,7 +110,7 @@ int rtlink_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
     return size;
 }
 
-int rtlink_fops_poll(struct dfs_fd *fd, struct rt_pollreq *req)
+int rtlink_fops_poll(struct dfs_file *fd, struct rt_pollreq *req)
 {
     int mask = 0;
     int flags = 0;
diff --git a/documentation/sal/sal.md b/documentation/sal/sal.md
index e4a9a58e74a02ce162f3c258d02d47de920e92f9..8e768f4f063018c722a31ef51a5802691947a8cc 100644
--- a/documentation/sal/sal.md
+++ b/documentation/sal/sal.md
@@ -685,7 +685,7 @@ struct sal_socket_ops
     int (*getsockname)(int s, struct sockaddr *name, socklen_t *namelen);
     int (*ioctlsocket)(int s, long cmd, void *arg);
 #ifdef SAL_USING_POSIX
-    int (*poll)       (struct dfs_fd *file, struct rt_pollreq *req);
+    int (*poll)       (struct dfs_file *file, struct rt_pollreq *req);
 #endif
 };
 
@@ -732,7 +732,7 @@ The following is the access registration process implemented by AT Socket networ
 #ifdef SAL_USING_AT
 
 /* A custom poll execution function that handles the events received in the poll */
-static int at_poll(struct dfs_fd *file, struct rt_pollreq *req)
+static int at_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     int mask = 0;
     struct at_socket *sock;