diff --git a/blobfs/Cargo.toml b/blobfs/Cargo.toml
index 053702444b7..26a270e5526 100644
--- a/blobfs/Cargo.toml
+++ b/blobfs/Cargo.toml
@@ -18,7 +18,7 @@ rafs = { path = "../rafs" }
 nydus-error = { path = "../error" }
 storage = { path = "../storage", features = ["backend-localfs", "backend-oss", "backend-registry"] }
 
-fuse-backend-rs = { git = "https://github.com/cloud-hypervisor/fuse-backend-rs.git", rev = "afc7b69", optional = true }
+fuse-backend-rs = { git = "https://github.com/cloud-hypervisor/fuse-backend-rs.git", rev = "afc7b69" }
 
 [features]
 virtiofs = [ "fuse-backend-rs/virtiofs", "vm-memory/backend-mmap"]
diff --git a/rafs/src/fs.rs b/rafs/src/fs.rs
index eb3f9349d9e..c1969d820ac 100644
--- a/rafs/src/fs.rs
+++ b/rafs/src/fs.rs
@@ -1097,4 +1097,3 @@ pub(crate) mod tests {
         assert!(BlobPrefetchConfig::try_from(&config).is_ok());
     }
 }
-
diff --git a/src/bin/nydusd/fusedev.rs b/src/bin/nydusd/fusedev.rs
index 676096a547b..9f675fe1a8a 100644
--- a/src/bin/nydusd/fusedev.rs
+++ b/src/bin/nydusd/fusedev.rs
@@ -21,20 +21,20 @@ use std::thread::{self, JoinHandle};
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use fuse_backend_rs::abi::linux_abi::{InHeader, OutHeader};
-use fuse_backend_rs::transport::fusedev::{FuseChannel, FuseSession};
 use fuse_backend_rs::api::server::{MetricsHook, Server};
 use fuse_backend_rs::api::Vfs;
+use fuse_backend_rs::transport::fusedev::{FuseChannel, FuseSession};
 use nix::sys::stat::{major, minor};
 use nydus_app::BuildTimeInfo;
 use serde::Serialize;
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::upgrade::{self, FailoverPolicy, UpgradeManager};
 use crate::daemon::{
     DaemonError, DaemonResult, DaemonState, DaemonStateMachineContext, DaemonStateMachineInput,
     DaemonStateMachineSubscriber, FsBackendCollection, FsBackendMountCmd, NydusDaemon, Trigger,
 };
 use crate::exit_event_manager;
+use crate::upgrade::{self, FailoverPolicy, UpgradeManager};
 
 #[derive(Serialize)]
 struct FuseOp {
@@ -398,7 +398,6 @@ pub fn create_nydus_daemon(
     mount_cmd: Option<FsBackendMountCmd>,
     bti: BuildTimeInfo,
 ) -> Result<Arc<dyn NydusDaemon + Send + Sync>> {
-    let (trigger, events_rx) = channel::<DaemonStateMachineInput>();
     let session = FuseSession::new(Path::new(mountpoint), "rafs", "", readonly)?;
 
     // Create upgrade manager
diff --git a/src/bin/nydusd/main.rs b/src/bin/nydusd/main.rs
index 50293c872ca..dd74a402ae5 100644
--- a/src/bin/nydusd/main.rs
+++ b/src/bin/nydusd/main.rs
@@ -235,7 +235,7 @@ fn main() -> Result<()> {
                 .short("B")
                 .help("Rafs filesystem bootstrap/metadata file")
                 .takes_value(true)
-                .conflicts_with("shared-dir")
+                .conflicts_with("shared-dir"),
         )
         .arg(
             Arg::with_name("shared-dir")
@@ -246,11 +246,12 @@ fn main() -> Result<()> {
                 .conflicts_with("bootstrap"),
         )
         .arg(
-            Arg::with_name("hybrid-mode").long("hybrid-mode")
-            .help("run nydusd in rafs and passthroughfs hybrid mode")
-            .required(false)
-            .takes_value(false)
-            .global(true)
+            Arg::with_name("hybrid-mode")
+                .long("hybrid-mode")
+                .help("run nydusd in rafs and passthroughfs hybrid mode")
+                .required(false)
+                .takes_value(false)
+                .global(true),
         );
 
     #[cfg(feature = "fusedev")]
diff --git a/storage/src/device.rs b/storage/src/device.rs
index ce318477ccd..dabae321b9f 100644
--- a/storage/src/device.rs
+++ b/storage/src/device.rs
@@ -864,7 +864,11 @@ impl BlobDevice {
     }
 
     /// Read a range of data from blob into the provided writer
-    pub fn read_to(&self, w: &mut dyn ZeroCopyWriter<S = ()>, desc: &mut BlobIoVec) -> io::Result<usize> {
+    pub fn read_to(
+        &self,
+        w: &mut dyn ZeroCopyWriter<S = ()>,
+        desc: &mut BlobIoVec,
+    ) -> io::Result<usize> {
         // Validate that:
         // - bi_vec[0] is valid
         // - bi_vec[0].blob.blob_index() is valid