diff --git a/proto/lws.proto b/proto/lws.proto
index 39a804c..20f10b3 100644
--- a/proto/lws.proto
+++ b/proto/lws.proto
@@ -33,6 +33,12 @@ service LwsVfs {
   rpc fchown(chown) returns (chown) {}
   rpc frelease(release) returns (release) {}
   rpc fmkdir(mkdir) returns (mkdir) {}
+  rpc frmdir(rmdir) returns (rmdir) {}
+  rpc fflush(flush) returns (flush) {}
+  rpc fopendir(opendir) returns (opendir) {}
+  rpc freleasedir(releasedir) returns (releasedir) {}
+  rpc fcreate (create) returns (create) {}
+  rpc funlink(unlink) returns (unlink) {}
 }
 
 // The request message containing the user's name.
@@ -161,3 +167,38 @@ message mkdir {
   uint32 mode = 3;
   int32 ret = 15;
 }
+
+message rmdir {
+  string path = 1;
+  int32 ret = 15;
+}
+
+message flush {
+  string path = 1;
+  file_info fi = 2;
+  int32 ret = 15;
+}
+
+message opendir{
+  string path = 1;
+  file_info fi = 2;
+  int32 ret = 15;
+}
+
+message releasedir{
+  string path = 1;
+  file_info fi = 2;
+  int32 ret = 15;
+}
+
+message create{
+  string path = 1;
+  uint32 mode = 2;
+  file_info fi = 3;
+  int32 ret = 15;
+}
+
+message unlink{
+  string path = 1;
+  int32 ret = 15;
+}
\ No newline at end of file
diff --git a/src/fs_impl/mod.rs b/src/fs_impl/mod.rs
index c401d3f..95d50a2 100644
--- a/src/fs_impl/mod.rs
+++ b/src/fs_impl/mod.rs
@@ -1,13 +1,14 @@
 use std::fs;
 
 use std::error::Error;
-use std::io::{self, Seek as ioSeek};
+use std::io::{self, ErrorKind, Seek as ioSeek, SeekFrom};
 
 use crate::lws_vfs::{FileInfo, Fstat};
 
+use std::sync::{Arc, Mutex};
+use std::collections::HashMap;
+
 extern crate winapi;
-use fs::remove_file;
-use io::Write;
 use std::os::windows::fs::MetadataExt;
 use std::os::windows::prelude::*;
 use winapi::um::winnt::FILE_ATTRIBUTE_READONLY;
@@ -22,7 +23,56 @@ fn from_metadata(sta: &mut Fstat, metadata: &fs::Metadata) -> Result<(), Box<dyn
     sta.fst_atime = metadata.last_access_time();
     Ok(())
 }
-pub fn fgetattr(path: &String, sta: &mut Fstat, _fi: &mut FileInfo) -> Result<i32, Box<dyn Error>> {
+
+
+#[derive(Debug, Default)]
+struct FileFdMgnt {
+    // key is fd, value is FileHandle
+    files: HashMap<u64, File>,
+    curr_fd: u64,
+}
+
+impl FileFdMgnt {
+    pub fn new() -> FileFdMgnt {
+        FileFdMgnt {
+            curr_fd: 3,
+            files: HashMap::new(),
+        }
+    }
+    fn gen_fd(&mut self) -> Result<u64, Box<dyn Error>> {
+        let refd = self.curr_fd;
+        loop {
+            self.curr_fd += 1;
+            match self.files.get(&self.curr_fd) {
+                Some(_) => {}
+                None => {
+                    break;
+                }
+            }
+            if refd == self.curr_fd {
+                return Err(Box::new(std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    "no fd",
+                )));
+            }
+        }
+        Ok(self.curr_fd)
+    }
+    pub fn push(&mut self, handle: File) -> Result<u64, Box<dyn Error>> {
+        let fd = self.gen_fd()?;
+        self.files.insert(fd, handle);
+        Ok(fd)
+    }
+    pub fn pop(&mut self, fd: u64) -> Option<File> {
+        self.files.remove(&fd)
+    }
+}
+pub struct FSImpl{
+    file_fds: Arc<Mutex<FileFdMgnt>>,
+}
+
+impl FSImpl {
+pub fn fgetattr(&self, path: &String, sta: &mut Fstat, _fi: &mut FileInfo) -> Result<i32, Box<dyn Error>> {
     let metadata = fs::metadata(path)?;
     from_metadata(sta, &metadata)?;
     let perm = get_file_mode_mask(path);
@@ -30,12 +80,12 @@ pub fn fgetattr(path: &String, sta: &mut Fstat, _fi: &mut FileInfo) -> Result<i3
     Ok(0)
 }
 
-pub fn fopen(path: &String, _fi: &mut FileInfo) -> Result<fs::File, Box<dyn Error>> {
+pub fn fopen(&self, path: &String, _fi: &mut FileInfo) -> Result<fs::File, Box<dyn Error>> {
     return Ok(fs::File::open(path)?);
 }
 
 pub fn fread(
-    path: &String,
+    &self, path: &String,
     buffer: &mut Vec<u8>,
     _size: &mut usize,
     offsize: usize,
@@ -44,7 +94,11 @@ pub fn fread(
     let mut file = fs::File::open(path)?;
     match file.seek_read(buffer, offsize as u64) {
         Ok(size) => {
-            println!("size is:{}, buffer is {}", size, String::from_utf8(buffer.to_vec()).unwrap());
+            println!(
+                "size is:{}, buffer is {}",
+                size,
+                String::from_utf8(buffer.to_vec()).unwrap()
+            );
             buffer.resize(size, 0)
         }
         Err(_) => {
@@ -54,9 +108,14 @@ pub fn fread(
     Ok(0)
 }
 
-pub fn fwrite(path: &String, buffer: &Vec<u8>, size: &mut usize, offsize: usize, _fi: &mut FileInfo,
+pub fn fwrite(
+    &self, path: &String,
+    buffer: &Vec<u8>,
+    size: &mut usize,
+    offsize: usize,
+    _fi: &mut FileInfo,
 ) -> Result<i32, Box<dyn Error>> {
-    let mut file  = fs::File::options().write(true).create(true).open(path)?;
+    let mut file = fs::File::options().write(true).create(true).open(path)?;
     match file.seek_write(buffer, offsize as u64) {
         Ok(written) => {
             *size = written as usize;
@@ -68,7 +127,7 @@ pub fn fwrite(path: &String, buffer: &Vec<u8>, size: &mut usize, offsize: usize,
     Ok(0)
 }
 pub fn freaddir(
-    path: &String,
+    &self, path: &String,
     buffer: &mut Vec<String>,
     _size: usize,
     _offset: usize,
@@ -91,37 +150,37 @@ pub fn freaddir(
     }
     Ok(0)
 }
-pub fn fmkdir(path: &String, _mode: u32) -> Result<i32, Box<dyn Error>> {
+pub fn fmkdir(&self, path: &String, _mode: u32) -> Result<i32, Box<dyn Error>> {
     fs::create_dir(path)?;
     Ok(0)
 }
-pub fn fchown(_path: &String, _uid: u32, _gid: u32) -> Result<i32, Box<dyn Error>> {
+pub fn fchown(&self, _path: &String, _uid: u32, _gid: u32) -> Result<i32, Box<dyn Error>> {
     Ok(-1)
 }
-pub fn ftruncate(path: &String, _size: usize) -> Result<i32, Box<dyn Error>> {
-    fs::OpenOptions::new()
-        .write(true)
+pub fn ftruncate(&self, path: &String, size: u64) -> Result<i32, Box<dyn Error>> {
+    let mut file = fs::File::options().write(true)
         .truncate(true)
         .open(path)?;
+    file.seek(SeekFrom::Start(size))?;
+    file.set_len(size)?;
     Ok(0)
 }
 
-use std::fs::OpenOptions;
-use std::ptr::null_mut;
-use winapi::ctypes::c_void;
-use winapi::shared::minwindef::DWORD;
-use winapi::shared::minwindef::FILETIME;
-use winapi::um::fileapi::SetFileTime;
-fn system_time_to_file_time(seconds: u64, nanoseconds: u32) -> FILETIME {
-    let total_nanoseconds = (seconds * 1_000_000_000) + nanoseconds as u64;
-    let total_100_nanoseconds = total_nanoseconds / 100;
-    FILETIME {
-        dwLowDateTime: total_100_nanoseconds as DWORD,
-        dwHighDateTime: (total_100_nanoseconds >> 32) as DWORD,
+pub fn futimens(&self, path: &String, a: &Vec<u64>, m: &Vec<u64>) -> Result<i32, Box<dyn Error>> {
+    use std::ptr::null_mut;
+    use winapi::ctypes::c_void;
+    use winapi::shared::minwindef::DWORD;
+    use winapi::shared::minwindef::FILETIME;
+    use winapi::um::fileapi::SetFileTime;
+    fn system_time_to_file_time(seconds: u64, nanoseconds: u32) -> FILETIME {
+        let total_nanoseconds = (seconds * 1_000_000_000) + nanoseconds as u64;
+        let total_100_nanoseconds = total_nanoseconds / 100;
+        FILETIME {
+            dwLowDateTime: total_100_nanoseconds as DWORD,
+            dwHighDateTime: (total_100_nanoseconds >> 32) as DWORD,
+        }
     }
-}
-pub fn futimens(path: &String, a: &Vec<u64>, m: &Vec<u64>) -> Result<i32, Box<dyn Error>> {
-    let file = OpenOptions::new().write(true).open(path)?;
+    let file = fs::File::options().write(true).open(path)?;
     let handle = file.as_raw_handle();
 
     let atime = system_time_to_file_time(a[0], a[1] as u32);
@@ -135,11 +194,16 @@ pub fn futimens(path: &String, a: &Vec<u64>, m: &Vec<u64>) -> Result<i32, Box<dy
         Err(Box::new(io::Error::last_os_error()))
     }
 }
-pub fn frelease(_path: &String, _fi: &mut FileInfo) -> Result<i32, Box<dyn Error>> {
-    Ok(0)
+pub fn frelease(&self, _path: &String, _fi: &mut FileInfo) -> Result<i32, Box<dyn Error>> {
+    if let Some(fh) == self.file_fds.lock().unwrap().pop(fi.fh){
+        drop(fh);
+        Ok(0)
+    } else {
+        Ok(-1)
+    }
 }
 pub fn fsetxattr(
-    _path: &String,
+    &self, _path: &String,
     _name: &str,
     _value: &Vec<u8>,
     _size: usize,
@@ -147,7 +211,7 @@ pub fn fsetxattr(
 ) -> Result<i32, Box<dyn Error>> {
     Ok(-1)
 }
-pub fn fgetxattr(_path: &String, _name: &str, _size: usize) -> Result<i32, Box<dyn Error>> {
+pub fn fgetxattr(&self, _path: &String, _name: &str, _size: usize) -> Result<i32, Box<dyn Error>> {
     Ok(-1)
 }
 
@@ -172,16 +236,26 @@ fn get_file_mode_mask(path: &str) -> u32 {
     }
     permissions
 }
-pub fn faccess(path: &String, mask: u32) -> Result<i32, Box<dyn Error>> {
+pub fn faccess(&self, path: &String, mask: u32) -> Result<i32, Box<dyn Error>> {
     let permissions = get_file_mode_mask(path);
     Ok(if permissions & mask != 0 { 0 } else { -1 })
 }
 
+pub fn frmdir(&self, path: &String) -> Result<i32, Box<dyn Error>> {
+    fs::remove_dir(path)?;
+    Ok(0)
+}
+}
+
 #[test]
 fn test_fread() {
     use crate::fs_impl::*;
     let path = String::from("test_fread.txt");
-    let file: fs::File = fs::File::options().write(true).create(true).open(&path).unwrap();
+    let file: fs::File = fs::File::options()
+        .write(true)
+        .create(true)
+        .open(&path)
+        .unwrap();
 
     let ref_buffer = b"This is a test file.";
     let _ = file.seek_write(ref_buffer, 0);
@@ -244,26 +318,48 @@ fn test_fwrite() {
     // cleanup
     //let _ = fs::remove_file(path);
 }
-    // let result = fwrite(&path, &buffer, &mut size, offsize, &mut fi);
-    // println!("result: {:?}", result);
-    // println!("size: {:?}", size);
-    // println!("buffer: {:?}", buffer);
-    // let result = freaddir(&path, &mut vec![], 0, 0, &mut fi);
-    // println!("result: {:?}", result);
-    // println!("buffer: {:?}", buffer);
-    // let result = fmkdir(&path, 0);
-    // println!("result: {:?}", result);
-    // let result = fchown(&path, 0, 0);
-    // println!("result: {:?}", result);
-    // let result = ftruncate(&path, 100);
-    // println!("result: {:?}", result);
-    // let result = futimens(&path, &vec![100, 0], &vec![100, 0]);
-    // println!("result: {:?}", result);
-    // let result = frelease(&path, &mut fi);
-    // println!("result: {:?}", result);
-    // let result = fsetxattr(&path, "test", &vec![1,2,3], 3, 0);
-    // println!("result: {:?}", result);
-    // let result = fgetxattr(&path, "test", 100);
-    // println!("result: {:?}", result);
-    // let result = faccess(&path, 0o777);
-    // println!("result: {:?}", result);
+#[test]
+fn test_dir() {
+    use std::path::Path;
+    let path = String::from("test_dir");
+    let sub_path = String::from("test_dir/test_sub_dir");
+    //创建父目录
+    let _ = fmkdir(&path, 0);
+    //创建子目录
+    let _ = fmkdir(&sub_path, 0);
+    assert_eq!(true, Path::new(&sub_path).is_dir());
+    assert_eq!(true, Path::new(&path).is_dir());
+    //一次性创建多级目录
+    let ret = fmkdir(&String::from("patent/child"), 0);
+    assert_ne!(
+        match ret {
+            Ok(ret) => ret,
+            Err(_) => -1,
+        },
+        0
+    );
+    fs::remove_dir_all(path);
+}
+// let result = fwrite(&path, &buffer, &mut size, offsize, &mut fi);
+// println!("result: {:?}", result);
+// println!("size: {:?}", size);
+// println!("buffer: {:?}", buffer);
+// let result = freaddir(&path, &mut vec![], 0, 0, &mut fi);
+// println!("result: {:?}", result);
+// println!("buffer: {:?}", buffer);
+// let result = fmkdir(&path, 0);
+// println!("result: {:?}", result);
+// let result = fchown(&path, 0, 0);
+// println!("result: {:?}", result);
+// let result = ftruncate(&path, 100);
+// println!("result: {:?}", result);
+// let result = futimens(&path, &vec![100, 0], &vec![100, 0]);
+// println!("result: {:?}", result);
+// let result = frelease(&path, &mut fi);
+// println!("result: {:?}", result);
+// let result = fsetxattr(&path, "test", &vec![1,2,3], 3, 0);
+// println!("result: {:?}", result);
+// let result = fgetxattr(&path, "test", 100);
+// println!("result: {:?}", result);
+// let result = faccess(&path, 0o777);
+// println!("result: {:?}", result);
diff --git a/src/lib.rs b/src/lib.rs
index 534b2d9..a815016 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,12 +1,13 @@
 use lws_vfs::lws_vfs_server::LwsVfs;
-use lws_vfs::{HelloReply, HelloRequest, Getattr, Setxattr, Access, Readdir, Read, Open,Write,Getxattr,Truncate,Utimens,Chown, Release, Fstat, FileInfo, Mkdir};
-use tonic::{Request, Response, Status};
+use lws_vfs::{
+    Access, Chown, FileInfo, Flush, Fstat, Getattr, Getxattr, HelloReply, HelloRequest, Mkdir,
+    Open, Read, Readdir, Release, Rmdir, Setxattr, Truncate, Utimens, Write, Flush,
+};
 use serde_json::{self, Value};
+use std::error::Error;
 use std::fs::File;
 use std::io::{BufReader, Read as _};
-use std::error::Error;
-use std::collections::HashMap;
-use std::sync::{Arc,Mutex};
+use tonic::{Request, Response, Status};
 mod fs_impl;
 pub mod lws_vfs {
     tonic::include_proto!("lws_vfs");
@@ -24,35 +25,39 @@ pub mod lws_vfs {
 // }
 //
 #[derive(Debug, Default)]
-pub struct Config{
-    port:u16,
-    mount_map:HashMap<String,String>,
+pub struct Config {
+    port: u16,
+    mount_map: HashMap<String, String>,
 }
-impl Config{
-    pub fn new(json:&str) -> Result<Config, Box<dyn Error>> {
+impl Config {
+    pub fn new(json: &str) -> Result<Config, Box<dyn Error>> {
         let mut file = File::open(json)?;
         let mut buffer = String::new();
         file.read_to_string(&mut buffer)?;
-        let json:Value = serde_json::from_str(buffer.as_ref())?;
-        let port:u16 = match json.get("port"){
+        let json: Value = serde_json::from_str(buffer.as_ref())?;
+        let port: u16 = match json.get("port") {
             Some(port) => port.as_u64().expect("expect port is a number but its not") as u16,
-            None => {
-                5001
-            }
+            None => 5001,
         };
-        let mounts = match json.get("mount"){
+        let mounts = match json.get("mount") {
             Some(mounts) => mounts.as_object().unwrap(),
             None => {
-                return Err(Box::new(std::io::Error::new(std::io::ErrorKind::Other, "no mount map")))
+                return Err(Box::new(std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    "no mount map",
+                )))
             }
         };
-        let mount_map = mounts.iter().map(|(key,value)|{
-            (key.as_str().to_string(),value.as_str().unwrap().to_string())
-        }).collect();
-        Ok(Config{
-            port,
-            mount_map
-        })
+        let mount_map = mounts
+            .iter()
+            .map(|(key, value)| {
+                (
+                    key.as_str().to_string(),
+                    value.as_str().unwrap().to_string(),
+                )
+            })
+            .collect();
+        Ok(Config { port, mount_map })
     }
 
     pub fn get_port(&self) -> u16 {
@@ -60,51 +65,6 @@ impl Config{
     }
 }
 
-#[derive(Debug, Default)]
-struct FileFdMgnt {
-    // key is fd, value is FileHandle
-    files:HashMap<u64,File>,
-    curr_fd:u64,
-}
-
-impl FileFdMgnt {
-    pub fn new() -> FileFdMgnt {
-        FileFdMgnt{
-            curr_fd:3,
-            files:HashMap::new()
-        }
-    }
-    fn gen_fd(&mut self) -> Result<u64, Box<dyn Error>>  {
-        let refd = self.curr_fd;
-        loop{
-            self.curr_fd += 1;
-            match self.files.get(&self.curr_fd){
-                Some(_) => {}
-                None => {
-                    break;
-                }
-            }
-            if refd == self.curr_fd {
-                return Err(Box::new(std::io::Error::new(std::io::ErrorKind::Other, "no fd")))
-            }
-        }
-        Ok(self.curr_fd)
-    }
-    pub fn push(&mut self, handle:File) -> Result<u64, Box<dyn Error>> {
-        let fd = self.gen_fd()?;
-        self.files.insert(fd, handle);
-        Ok(fd)
-    }
-    pub fn pop(&mut self, fd:u64){
-        if let Some(handle) = self.files.remove(&fd){
-            drop(handle);
-        }
-        else{
-            println!("not found fd:{}", fd);
-        }
-    }
-}
-
 /// server 的基础结构
 #[derive(Debug, Default)]
 pub struct LwsVfsIns {
@@ -113,16 +73,16 @@ pub struct LwsVfsIns {
 }
 
 impl LwsVfsIns {
-    pub fn new(json:&str) -> Result<LwsVfsIns, Box<dyn Error>> {
-        Ok(LwsVfsIns{
-            config:Config::new(json)?,
-            file_fds:Arc::new(Mutex::new(FileFdMgnt::new())),
+    pub fn new(json: &str) -> Result<LwsVfsIns, Box<dyn Error>> {
+        Ok(LwsVfsIns {
+            config: Config::new(json)?,
+            file_fds: Arc::new(Mutex::new(FileFdMgnt::new())),
         })
     }
-    fn lpath(&self, path:&String) -> String {
+    fn lpath(&self, path: &String) -> String {
         let mut ret = String::new();
-        for (k,v) in &self.config.mount_map{
-            if path.starts_with(v){
+        for (k, v) in &self.config.mount_map {
+            if path.starts_with(v) {
                 ret = path.replace(v, k);
                 break;
             }
@@ -133,7 +93,10 @@ impl LwsVfsIns {
 
 #[tonic::async_trait]
 impl LwsVfs for LwsVfsIns {
-    async fn say_hello(&self, request: Request<HelloRequest>) -> Result<Response<HelloReply>, Status> {
+    async fn say_hello(
+        &self,
+        request: Request<HelloRequest>,
+    ) -> Result<Response<HelloReply>, Status> {
         println!("Got a request: {:?}", request);
 
         let reply = HelloReply {
@@ -146,10 +109,10 @@ impl LwsVfs for LwsVfsIns {
         println!("Got a request: {:?}", request);
 
         let request = request.into_inner();
-        let path        = &self.lpath(&request.path);
+        let path = &self.lpath(&request.path);
         let mut fstat = Fstat::default();
         let mut fi = FileInfo::default();
-        let ret = match fs_impl::fgetattr(path, & mut fstat, &mut fi){
+        let ret = match fs_impl::fgetattr(path, &mut fstat, &mut fi) {
             Ok(ret) => ret,
             Err(e) => {
                 println!("Error getting file metadata: {:?}", e);
@@ -157,8 +120,8 @@ impl LwsVfs for LwsVfsIns {
             }
         };
         let reply = Getattr {
-            path:path.to_string(),
-            stat:Some(fstat),
+            path: path.to_string(),
+            stat: Some(fstat),
             ret,
         };
         Ok(Response::new(reply))
@@ -166,11 +129,11 @@ impl LwsVfs for LwsVfsIns {
     async fn fopen(&self, request: Request<Open>) -> Result<Response<Open>, Status> {
         println!("Got a request: {:?}", request);
         let request = request.into_inner();
-        let path    = &self.lpath(&request.path);
-        let mut fi =request.fi.unwrap();
-        let ret = match fs_impl::fopen(path, &mut fi){
+        let path = &self.lpath(&request.path);
+        let mut fi = request.fi.unwrap();
+        let ret = match fs_impl::fopen(path, &mut fi) {
             Ok(file) => {
-                match self.file_fds.lock().unwrap().push(file){
+                match self.file_fds.lock().unwrap().push(file) {
                     Ok(fd) => fi.fh = fd,
                     Err(e) => {
                         println!("Error pushing file[{}]: {:?}", path, e);
@@ -185,7 +148,7 @@ impl LwsVfs for LwsVfsIns {
         };
         let reply = Open {
             path: path.to_string(),
-            fi:Some(fi),
+            fi: Some(fi),
             ret,
         };
         Ok(Response::new(reply))
@@ -193,13 +156,15 @@ impl LwsVfs for LwsVfsIns {
     async fn fread(&self, request: Request<Read>) -> Result<Response<Read>, Status> {
         println!("Got a request: {:?}", request);
         let request = request.into_inner();
-        let mut fi      = request.fi.unwrap();
-        let path        = &self.lpath(&request.path);
-        let mut size:usize  = request.size.try_into().unwrap();
-        let offset:usize       = request.offset.try_into().unwrap();
-        let mut buff: Vec<u8>  = Vec::with_capacity(size);
-        unsafe { buff.set_len(size); }
-        match fs_impl::fread(path, &mut buff, &mut size, offset, &mut fi){
+        let mut fi = request.fi.unwrap();
+        let path = &self.lpath(&request.path);
+        let mut size: usize = request.size.try_into().unwrap();
+        let offset: usize = request.offset.try_into().unwrap();
+        let mut buff: Vec<u8> = Vec::with_capacity(size);
+        unsafe {
+            buff.set_len(size);
+        }
+        match fs_impl::fread(path, &mut buff, &mut size, offset, &mut fi) {
             Ok(ret) => {
                 let reply = Read {
                     path: request.path,
@@ -210,7 +175,7 @@ impl LwsVfs for LwsVfsIns {
                     ret,
                 };
                 Ok(Response::new(reply))
-            },
+            }
             Err(e) => {
                 println!("Error reading file[{}]: {:?}", path, e);
                 let reply = Read {
@@ -227,15 +192,13 @@ impl LwsVfs for LwsVfsIns {
     }
     async fn fwrite(&self, request: Request<Write>) -> Result<Response<Write>, Status> {
         let request = request.into_inner();
-        let mut fi      = request.fi.unwrap();
-        let path        = &self.lpath(&request.path);
+        let mut fi = request.fi.unwrap();
+        let path = &self.lpath(&request.path);
         let buff = request.buff;
         let mut size = request.size as usize;
         let offset = request.offset as usize;
         let ret = match fs_impl::fwrite(path, &buff, &mut size, offset, &mut fi) {
-            Ok(ret) => {
-                ret
-            },
+            Ok(ret) => ret,
             Err(e) => {
                 println!("Error fwrite file[{}]: {:?}", path, e);
                 -1
@@ -243,20 +206,17 @@ impl LwsVfs for LwsVfsIns {
         };
         let reply = Write {
             ret,
-            size:size as i64,
+            size: size as i64,
             ..Default::default()
         };
         Ok(Response::new(reply))
-
     }
-    async fn faccess( &self, request: Request<Access>,) -> Result<Response<Access>, Status> {
+    async fn faccess(&self, request: Request<Access>) -> Result<Response<Access>, Status> {
         let request = request.into_inner();
-        let path        = &self.lpath(&request.path);
+        let path = &self.lpath(&request.path);
         let mask = request.mask;
         let ret = match fs_impl::faccess(path, mask) {
-            Ok(ret) => {
-                ret
-            },
+            Ok(ret) => ret,
             Err(e) => {
                 println!("Error access file[{}]: {:?}", path, e);
                 -1
@@ -264,7 +224,7 @@ impl LwsVfs for LwsVfsIns {
         };
         let reply = Access {
             ret,
-            path:path.to_string(),
+            path: path.to_string(),
             mask,
         };
         Ok(Response::new(reply))
@@ -282,9 +242,9 @@ impl LwsVfs for LwsVfsIns {
             Err(e) => {
                 println!("Error: setxattr file[{}]: {:?}", path, e);
                 -1
-            },
+            }
         };
-        let reply = Setxattr{
+        let reply = Setxattr {
             ret: ret,
             ..Setxattr::default()
         };
@@ -302,16 +262,16 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Getxattr{
+        let reply = Getxattr {
             ret,
             ..Getxattr::default()
-            };
+        };
         Ok(Response::new(reply))
     }
 
     async fn freaddir(&self, request: Request<Readdir>) -> Result<Response<Readdir>, Status> {
         let request = request.into_inner();
-        let mut fi      = request.fi.unwrap();
+        let mut fi = request.fi.unwrap();
         let path = &self.lpath(&request.path);
         let offset = request.offset as usize;
         let mut dirs: Vec<String> = Vec::new();
@@ -323,7 +283,7 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Readdir{
+        let reply = Readdir {
             ret,
             dirs,
             ..Readdir::default()
@@ -341,16 +301,16 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Mkdir{
+        let reply = Mkdir {
             ret,
             ..Mkdir::default()
         };
         Ok(Response::new(reply))
     }
     async fn ftruncate(&self, request: Request<Truncate>) -> Result<Response<Truncate>, Status> {
-        let request= request.into_inner();
+        let request = request.into_inner();
         let path = &self.lpath(&request.path);
-        let size = request.size as usize;
+        let size = request.size as u64;
         let ret = match fs_impl::ftruncate(path, size) {
             Ok(ret) => ret,
             Err(e) => {
@@ -358,10 +318,10 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Truncate{
+        let reply = Truncate {
             ret,
             ..Truncate::default()
-            };
+        };
         Ok(Response::new(reply))
     }
 
@@ -369,7 +329,7 @@ impl LwsVfs for LwsVfsIns {
         let request = request.into_inner();
         let path = &self.lpath(&request.path);
         let a_time = vec![request.ts[0].tv_sec as u64, request.ts[0].tv_nsec as u64];
-        let m_time =  vec![request.ts[1].tv_sec as u64, request.ts[1].tv_nsec as u64];
+        let m_time = vec![request.ts[1].tv_sec as u64, request.ts[1].tv_nsec as u64];
         let ret = match fs_impl::futimens(path, &a_time, &m_time) {
             Ok(ret) => ret,
             Err(e) => {
@@ -377,7 +337,7 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Utimens{
+        let reply = Utimens {
             ret,
             ..Utimens::default()
         };
@@ -396,7 +356,7 @@ impl LwsVfs for LwsVfsIns {
                 -1
             }
         };
-        let reply = Chown{
+        let reply = Chown {
             ret,
             ..Chown::default()
         };
@@ -405,19 +365,42 @@ impl LwsVfs for LwsVfsIns {
     async fn frelease(&self, request: Request<Release>) -> Result<Response<Release>, Status> {
         let request = request.into_inner();
         let path = &self.lpath(&request.path);
-        let mut fi      = request.fi.unwrap();
+        let mut fi = request.fi.unwrap();
         self.file_fds.lock().unwrap().pop(fi.fh);
         let ret = match fs_impl::frelease(path, &mut fi) {
             Ok(ret) => ret,
             Err(e) => {
                 println!("Error: release file[{}]: {:?}", path, e);
                 -1
-                }
+            }
         };
-        let reply = Release{
+        let reply = Release {
             ret,
             ..Release::default()
-            };
+        };
         Ok(Response::new(reply))
     }
+    async fn frmdir(&self, request: Request<Rmdir>) -> Result<Response<Rmdir>, Status> {
+        let request = request.into_inner();
+        let path = &self.lpath(&request.path);
+        let ret = match fs_impl::frmdir(path) {
+            Ok(ret) => ret,
+            Err(e) => {
+                println!("Error: rmdir [{}]: {:?}", path, e);
+                -1
+            }
+        };
+        let reply = Rmdir {
+            ret,
+            path: request.path,
+        };
+        Ok(Response::new(reply))
+    }
+
+    async fn fflush(&self, request: Request<Flush>) -> Result<Response<Flush>, Status> {
+        let request = request.into_inner();
+        let path = &self.lpath(&request.path);
+        let mut fi = request.fi.unwrap();
+        self.file_fds.lock().unwrap().pop(fi.fh);
+    }
 }