diff --git a/kernel/src/driver/block/virtio_blk.rs b/kernel/src/driver/block/virtio_blk.rs
index 74e1fbf6..e00d9f82 100644
--- a/kernel/src/driver/block/virtio_blk.rs
+++ b/kernel/src/driver/block/virtio_blk.rs
@@ -38,7 +38,7 @@ use crate::{
         },
     },
     exception::{irqdesc::IrqReturn, IrqNumber},
-    filesystem::{kernfs::KernFSInode, mbr::MbrDiskPartionTable, sysfs::AttributeGroup},
+    filesystem::{kernfs::KernFSInode, mbr::MbrDiskPartionTable},
     init::initcall::INITCALL_POSTCORE,
     libs::{
         rwlock::{RwLockReadGuard, RwLockWriteGuard},
@@ -407,10 +407,6 @@ impl Device for VirtIOBlkDevice {
     fn set_dev_parent(&self, parent: Option<Weak<dyn Device>>) {
         self.inner().device_common.parent = parent;
     }
-
-    fn attribute_groups(&self) -> Option<&'static [&'static dyn AttributeGroup]> {
-        None
-    }
 }
 
 impl KObject for VirtIOBlkDevice {
diff --git a/kernel/src/driver/net/irq_handle.rs b/kernel/src/driver/net/irq_handle.rs
index 5436a349..bdc3942d 100644
--- a/kernel/src/driver/net/irq_handle.rs
+++ b/kernel/src/driver/net/irq_handle.rs
@@ -23,7 +23,6 @@ impl IrqHandler for DefaultNetIrqHandler {
         _dynamic_data: Option<Arc<dyn IrqHandlerData>>,
     ) -> Result<IrqReturn, SystemError> {
         // poll_ifaces_try_lock_onetime().ok();
-        log::warn!("DefaultNetIrqHandler: poll_ifaces_try_lock_onetime -> poll_ifaces");
         poll_ifaces();
         Ok(IrqReturn::Handled)
     }
diff --git a/kernel/src/driver/net/loopback.rs b/kernel/src/driver/net/loopback.rs
index ffb81962..ee32a823 100644
--- a/kernel/src/driver/net/loopback.rs
+++ b/kernel/src/driver/net/loopback.rs
@@ -286,17 +286,11 @@ impl LoopbackInterface {
             smoltcp::iface::Interface::new(iface_config, &mut driver, Instant::now().into());
         //设置网卡地址为127.0.0.1
         iface.update_ip_addrs(|ip_addrs| {
-            for i in 1..=2 {
-                ip_addrs
-                    .push(IpCidr::new(IpAddress::v4(127, 0, 0, i), 8))
-                    .expect("Push ipCidr failed: full");
-            }
+            ip_addrs
+                .push(IpCidr::new(IpAddress::v4(127, 0, 0, 1), 8))
+                .expect("Push ipCidr failed: full");
         });
 
-        // iface.routes_mut().update(|routes_map| {
-        //     routes_map[0].
-        // });
-
         Arc::new(LoopbackInterface {
             driver: LoopbackDriverWapper(UnsafeCell::new(driver)),
             common: IfaceCommon::new(iface_id, iface),
diff --git a/kernel/src/driver/net/mod.rs b/kernel/src/driver/net/mod.rs
index 85067e3a..b55ee586 100644
--- a/kernel/src/driver/net/mod.rs
+++ b/kernel/src/driver/net/mod.rs
@@ -230,6 +230,7 @@ impl IfaceCommon {
             let new_instant = instant.total_millis() as u64;
             self.poll_at_ms.store(new_instant, Ordering::Relaxed);
 
+            // TODO: poll at
             // if old_instant == 0 || new_instant < old_instant {
             //     self.polling_wait_queue.wake_all();
             // }
@@ -237,12 +238,8 @@ impl IfaceCommon {
             self.poll_at_ms.store(0, Ordering::Relaxed);
         }
 
-        // if has_events {
-
-        // log::debug!("IfaceCommon::poll: has_events");
-        // We never try to hold the write lock in the IRQ context, and we disable IRQ when
-        // holding the write lock. So we don't need to disable IRQ when holding the read lock.
         self.bounds.read().iter().for_each(|bound_socket| {
+            // incase our inet socket missed the event, we manually notify it each time we poll
             bound_socket.on_iface_events();
             if has_events {
                 bound_socket
@@ -251,13 +248,13 @@ impl IfaceCommon {
             }
         });
 
+        // TODO: remove closed sockets
         // let closed_sockets = self
         //     .closing_sockets
         //     .lock_irq_disabled()
         //     .extract_if(|closing_socket| closing_socket.is_closed())
         //     .collect::<Vec<_>>();
         // drop(closed_sockets);
-        // }
     }
 
     pub fn update_ip_addrs(&self, ip_addrs: &[smoltcp::wire::IpCidr]) -> Result<(), SystemError> {
diff --git a/kernel/src/net/mod.rs b/kernel/src/net/mod.rs
index ce1993bf..83a52c74 100644
--- a/kernel/src/net/mod.rs
+++ b/kernel/src/net/mod.rs
@@ -10,9 +10,9 @@ use crate::{driver::net::Iface, libs::rwlock::RwLock};
 
 pub mod event_poll;
 pub mod net_core;
+pub mod posix;
 pub mod socket;
 pub mod syscall;
-pub mod syscall_util;
 
 lazy_static! {
     /// # 所有网络接口的列表
diff --git a/kernel/src/net/syscall_util.rs b/kernel/src/net/posix.rs
similarity index 99%
rename from kernel/src/net/syscall_util.rs
rename to kernel/src/net/posix.rs
index 76e6dc9a..693e2214 100644
--- a/kernel/src/net/syscall_util.rs
+++ b/kernel/src/net/posix.rs
@@ -1,3 +1,7 @@
+//
+// posix.rs 记录了系统调用时用到的结构
+//
+
 bitflags::bitflags! {
     // #[derive(PartialEq, Eq, Debug, Clone, Copy)]
     pub struct PosixArgsSocketType: u32 {
diff --git a/kernel/src/net/socket/base.rs b/kernel/src/net/socket/base.rs
index 946ef185..6b38f181 100644
--- a/kernel/src/net/socket/base.rs
+++ b/kernel/src/net/socket/base.rs
@@ -1,7 +1,7 @@
 #![allow(unused_variables)]
 
+use crate::net::posix::MsgHdr;
 use crate::net::socket::*;
-use crate::net::syscall_util::MsgHdr;
 use alloc::sync::Arc;
 use core::any::Any;
 use core::fmt::Debug;
diff --git a/kernel/src/net/socket/inet/datagram/mod.rs b/kernel/src/net/socket/inet/datagram/mod.rs
index 0a130eba..f6b3b406 100644
--- a/kernel/src/net/socket/inet/datagram/mod.rs
+++ b/kernel/src/net/socket/inet/datagram/mod.rs
@@ -307,129 +307,3 @@ bitflags! {
         const ESPINTCP = 7;             // Yikes, this is really xfrm encap types.
     }
 }
-
-// fn sock_set_option(
-//     &self,
-//     _socket: &mut udp::Socket,
-//     _level: SocketOptionsLevel,
-//     optname: PosixSocketOption,
-//     _optval: &[u8],
-// ) -> Result<(), SystemError> {
-//     use PosixSocketOption::*;
-//     use SystemError::*;
-
-//     if optname == SO_BINDTODEVICE {
-//         todo!("SO_BINDTODEVICE");
-//     }
-
-//     match optname {
-//         SO_TYPE => {}
-//         SO_PROTOCOL => {}
-//         SO_DOMAIN => {}
-//         SO_ERROR => {
-//             return Err(ENOPROTOOPT);
-//         }
-//         SO_TIMESTAMP_OLD => {}
-//         SO_TIMESTAMP_NEW => {}
-//         SO_TIMESTAMPNS_OLD => {}
-
-//         SO_TIMESTAMPING_OLD => {}
-
-//         SO_RCVTIMEO_OLD => {}
-
-//         SO_SNDTIMEO_OLD => {}
-
-//         // if define CONFIG_NET_RX_BUSY_POLL
-//         SO_BUSY_POLL | SO_PREFER_BUSY_POLL | SO_BUSY_POLL_BUDGET => {
-//             debug!("Unsupported socket option: {:?}", optname);
-//             return Err(ENOPROTOOPT);
-//         }
-//         // end if
-//         optname => {
-//             debug!("Unsupported socket option: {:?}", optname);
-//             return Err(ENOPROTOOPT);
-//         }
-//     }
-//     return Ok(());
-// }
-
-// fn udp_set_option(
-//     &self,
-//     level: SocketOptionsLevel,
-//     optname: usize,
-//     optval: &[u8],
-// ) -> Result<(), SystemError> {
-//     use PosixSocketOption::*;
-
-//     let so_opt_name =
-//         PosixSocketOption::try_from(optname as i32)
-//             .map_err(|_| SystemError::ENOPROTOOPT)?;
-
-//     if level == SocketOptionsLevel::SOL_SOCKET {
-//         self.with_mut_socket(f)
-//         self.sock_set_option(self., level, so_opt_name, optval)?;
-//         if so_opt_name == SO_RCVBUF || so_opt_name == SO_RCVBUFFORCE {
-//             todo!("SO_RCVBUF");
-//         }
-//     }
-
-//     match UdpSocketOptions::from_bits_truncate(optname as u32) {
-//         UdpSocketOptions::UDP_CORK => {
-//             todo!("UDP_CORK");
-//         }
-//         UdpSocketOptions::UDP_ENCAP => {
-//             match UdpEncapTypes::from_bits_truncate(optval[0]) {
-//                 UdpEncapTypes::ESPINUDP_NON_IKE => {
-//                     todo!("ESPINUDP_NON_IKE");
-//                 }
-//                 UdpEncapTypes::ESPINUDP => {
-//                     todo!("ESPINUDP");
-//                 }
-//                 UdpEncapTypes::L2TPINUDP => {
-//                     todo!("L2TPINUDP");
-//                 }
-//                 UdpEncapTypes::GTP0 => {
-//                     todo!("GTP0");
-//                 }
-//                 UdpEncapTypes::GTP1U => {
-//                     todo!("GTP1U");
-//                 }
-//                 UdpEncapTypes::RXRPC => {
-//                     todo!("RXRPC");
-//                 }
-//                 UdpEncapTypes::ESPINTCP => {
-//                     todo!("ESPINTCP");
-//                 }
-//                 UdpEncapTypes::ZERO => {}
-//                 _ => {
-//                     return Err(SystemError::ENOPROTOOPT);
-//                 }
-//             }
-//         }
-//         UdpSocketOptions::UDP_NO_CHECK6_TX => {
-//             todo!("UDP_NO_CHECK6_TX");
-//         }
-//         UdpSocketOptions::UDP_NO_CHECK6_RX => {
-//             todo!("UDP_NO_CHECK6_RX");
-//         }
-//         UdpSocketOptions::UDP_SEGMENT => {
-//             todo!("UDP_SEGMENT");
-//         }
-//         UdpSocketOptions::UDP_GRO => {
-//             todo!("UDP_GRO");
-//         }
-
-//         UdpSocketOptions::UDPLITE_RECV_CSCOV => {
-//             todo!("UDPLITE_RECV_CSCOV");
-//         }
-//         UdpSocketOptions::UDPLITE_SEND_CSCOV => {
-//             todo!("UDPLITE_SEND_CSCOV");
-//         }
-
-//         UdpSocketOptions::ZERO => {}
-//         _ => {
-//             return Err(SystemError::ENOPROTOOPT);
-//         }
-//     }
-//     return Ok(());
-// }
diff --git a/kernel/src/net/socket/inet/mod.rs b/kernel/src/net/socket/inet/mod.rs
index f28a9b35..074208ca 100644
--- a/kernel/src/net/socket/inet/mod.rs
+++ b/kernel/src/net/socket/inet/mod.rs
@@ -30,54 +30,3 @@ pub trait InetSocket: Socket {
     /// 通知socket发生的事件
     fn on_iface_events(&self);
 }
-
-// #[derive(Debug)]
-// pub enum InetSocket {
-//     // Raw(RawSocket),
-//     Udp(UdpSocket),
-//     Tcp(TcpSocket),
-// }
-
-// impl InetSocket {
-//     /// # `on_iface_events`
-//     /// 通知socket发生了事件
-//     pub fn on_iface_events(&self) {
-//         todo!()
-//     }
-// }
-
-// impl IndexNode for InetSocket {
-
-// }
-
-// impl Socket for InetSocket {
-//     fn epoll_items(&self) -> &super::common::poll_unit::EPollItems {
-//         match self {
-//             InetSocket::Udp(udp) => udp.epoll_items(),
-//             InetSocket::Tcp(tcp) => tcp.epoll_items(),
-//         }
-//     }
-
-//     fn bind(&self, endpoint: crate::net::Endpoint) -> Result<(), SystemError> {
-//         if let crate::net::Endpoint::Ip(ip) = endpoint {
-//             match self {
-//                 InetSocket::Udp(udp) => {
-//                     udp.do_bind(ip)?;
-//                 },
-//                 InetSocket::Tcp(tcp) => {
-//                     tcp.do_bind(ip)?;
-//                 },
-//             }
-//             return Ok(());
-//         }
-//         return Err(EINVAL);
-//     }
-
-//     fn wait_queue(&self) -> &super::common::poll_unit::WaitQueue {
-//         todo!()
-//     }
-
-//     fn on_iface_events(&self) {
-//         todo!()
-//     }
-// }
diff --git a/kernel/src/net/socket/inet/syscall.rs b/kernel/src/net/socket/inet/syscall.rs
index 3aaf6fc4..a89ce13e 100644
--- a/kernel/src/net/socket/inet/syscall.rs
+++ b/kernel/src/net/socket/inet/syscall.rs
@@ -14,20 +14,14 @@ fn create_inet_socket(
     // log::debug!("type: {:?}, protocol: {:?}", socket_type, protocol);
     use smoltcp::wire::IpProtocol::*;
     match socket_type {
-        PSOCK::Datagram => {
-            match protocol {
-                HopByHop | Udp => {
-                    return Ok(UdpSocket::new(false));
-                }
-                _ => {
-                    return Err(EPROTONOSUPPORT);
-                }
+        PSOCK::Datagram => match protocol {
+            HopByHop | Udp => {
+                return Ok(UdpSocket::new(false));
             }
-            // if !matches!(protocol, Udp) {
-            //     return Err(EPROTONOSUPPORT);
-            // }
-            // return Ok(UdpSocket::new(false));
-        }
+            _ => {
+                return Err(EPROTONOSUPPORT);
+            }
+        },
         PSOCK::Stream => match protocol {
             HopByHop | Tcp => {
                 return Ok(TcpSocket::new(false));
diff --git a/kernel/src/net/socket/posix/types.rs b/kernel/src/net/socket/posix/types.rs
index f415cf44..c27552d7 100644
--- a/kernel/src/net/socket/posix/types.rs
+++ b/kernel/src/net/socket/posix/types.rs
@@ -9,7 +9,7 @@ pub enum Type {
     Packet = 10,
 }
 
-use crate::net::syscall_util::PosixArgsSocketType;
+use crate::net::posix::PosixArgsSocketType;
 impl TryFrom<PosixArgsSocketType> for Type {
     type Error = system_error::SystemError;
     fn try_from(x: PosixArgsSocketType) -> Result<Self, Self::Error> {
diff --git a/kernel/src/net/syscall.rs b/kernel/src/net/syscall.rs
index 31ffcaeb..8d2cf8aa 100644
--- a/kernel/src/net/syscall.rs
+++ b/kernel/src/net/syscall.rs
@@ -10,7 +10,7 @@ use crate::{
 
 use super::socket::{self, unix::Unix, AddressFamily as AF, Endpoint};
 
-pub use super::syscall_util::*;
+pub use super::posix::*;
 
 /// Flags for socket, socketpair, accept4
 const SOCK_CLOEXEC: FileMode = FileMode::O_CLOEXEC;