diff --git a/kernel/src/file/buffer/mod.rs b/kernel/src/file/buffer/mod.rs
index ad262005..06d4c12c 100644
--- a/kernel/src/file/buffer/mod.rs
+++ b/kernel/src/file/buffer/mod.rs
@@ -27,7 +27,6 @@ use crate::{
 };
 use core::{alloc::AllocError, any::Any, ffi::c_void};
 use utils::{
-	boxed::Box,
 	collections::hashmap::HashMap,
 	errno::{AllocResult, EResult},
 	lock::Mutex,
@@ -54,7 +53,7 @@ pub trait BufferOps: Any + NodeOps {
 
 /// A buffer.
 #[derive(Clone, Debug)]
-pub struct Buffer(Arc<dyn BufferOps>);
+pub struct Buffer(pub Arc<dyn BufferOps>);
 
 impl Buffer {
 	/// Creates a new instance with the given buffer type.
@@ -91,20 +90,3 @@ impl NodeOps for Buffer {
 ///
 /// The key is the location of the file associated with the entry.
 pub static BUFFERS: Mutex<HashMap<FileLocation, Buffer>> = Mutex::new(HashMap::new());
-
-/// Returns the buffer associated with the file at location `loc`.
-///
-/// If the buffer does not exist, the function registers a new default buffer.
-pub fn get_or_default<B: BufferOps + TryDefault<Error = AllocError> + 'static>(
-	loc: &FileLocation,
-) -> AllocResult<Box<Buffer>> {
-	let mut buffers = BUFFERS.lock();
-	match buffers.get(loc).cloned() {
-		Some(buf) => Box::new(buf.clone()),
-		None => {
-			let buf = Buffer::new(B::try_default()?)?;
-			buffers.insert(loc.clone(), buf.clone())?;
-			Ok(buf)
-		}
-	}
-}
diff --git a/kernel/src/file/fs/tmp/mod.rs b/kernel/src/file/fs/tmp/mod.rs
index 4cd66a1d..f30505fb 100644
--- a/kernel/src/file/fs/tmp/mod.rs
+++ b/kernel/src/file/fs/tmp/mod.rs
@@ -141,7 +141,7 @@ impl Node {
 		inode: Option<INode>,
 		parent_inode: Option<INode>,
 	) -> AllocResult<Self> {
-		let file_type = stat.get_type().ok_or_else(|| errno!(EINVAL))?;
+		let file_type = stat.get_type().unwrap();
 		let content = match file_type {
 			FileType::Regular => NodeContent::Regular(Vec::new()),
 			FileType::Directory => {
@@ -371,7 +371,7 @@ impl NodeOps for Node {
 		// Get node
 		let node = fs.nodes.lock().get_node(inode)?.clone();
 		let mut inner = node.0.lock();
-		let entry_type = FileType::from_mode(inner.as_stat().mode).unwrap();
+		let entry_type = inner.as_stat().get_type().unwrap();
 		let mut parent_inner = self.0.lock();
 		// Get parent entries
 		let NodeContent::Directory(parent_entries) = &mut parent_inner.content else {
diff --git a/kernel/src/file/mod.rs b/kernel/src/file/mod.rs
index 4c280608..28b89b18 100644
--- a/kernel/src/file/mod.rs
+++ b/kernel/src/file/mod.rs
@@ -39,6 +39,7 @@ use crate::{
 	device,
 	device::{DeviceID, DeviceType},
 	file::{
+		buffer::{Buffer, BufferOps},
 		fs::{Filesystem, NodeOps},
 		path::{Path, PathBuf},
 		perm::{Gid, Uid},
@@ -50,7 +51,7 @@ use crate::{
 		unit::{Timestamp, TimestampScale},
 	},
 };
-use core::{ffi::c_void, ops::Deref};
+use core::{any::Any, ffi::c_void, ops::Deref};
 use mountpoint::{MountPoint, MountSource};
 use perm::AccessProfile;
 use utils::{
@@ -436,6 +437,14 @@ impl File {
 		FileType::from_mode(stat.mode).ok_or_else(|| errno!(EUCLEAN))
 	}
 
+	/// Returns the file's associated buffer.
+	///
+	/// If the file does not have a buffer of type `B`, the function returns `None`.
+	pub fn get_buffer<B: BufferOps>(&self) -> Option<&B> {
+		let buf = (&self.ops as &dyn Any).downcast_ref::<Buffer>()?;
+		(buf.0.deref() as &dyn Any).downcast_ref()
+	}
+
 	/// Reads the whole content of a file into a buffer.
 	///
 	/// This function does not change the file's offset.
diff --git a/kernel/src/process/mod.rs b/kernel/src/process/mod.rs
index 07f20332..e8791036 100644
--- a/kernel/src/process/mod.rs
+++ b/kernel/src/process/mod.rs
@@ -432,8 +432,7 @@ impl Process {
 			let mut fds_table = FileDescriptorTable::default();
 			let tty_path = PathBuf::try_from(TTY_DEVICE_PATH.as_bytes())?;
 			let tty_file = vfs::get_file_from_path(&tty_path, &rs)?;
-			let file = File::open(tty_file, Some(tty_path), file::O_RDWR)?;
-			let (stdin_fd_id, _) = fds_table.create_fd(0, file)?;
+			let (stdin_fd_id, _) = fds_table.create_fd(0, tty_file)?;
 			assert_eq!(stdin_fd_id, STDIN_FILENO);
 			fds_table.duplicate_fd(
 				STDIN_FILENO as _,
diff --git a/kernel/src/syscall/bind.rs b/kernel/src/syscall/bind.rs
index 73336bdb..1a96d089 100644
--- a/kernel/src/syscall/bind.rs
+++ b/kernel/src/syscall/bind.rs
@@ -40,17 +40,9 @@ pub fn bind(
 		return Err(errno!(EINVAL));
 	}
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	let addr = addr
 		.copy_from_user(..(addrlen as usize))?
 		.ok_or_else(|| errno!(EFAULT))?;
diff --git a/kernel/src/syscall/connect.rs b/kernel/src/syscall/connect.rs
index 64d74921..dde64c42 100644
--- a/kernel/src/syscall/connect.rs
+++ b/kernel/src/syscall/connect.rs
@@ -41,17 +41,9 @@ pub fn connect(
 		return Err(errno!(EINVAL));
 	}
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let _sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let _sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	let _addr = addr
 		.copy_from_user(..(addrlen as usize))?
 		.ok_or_else(|| errno!(EFAULT))?;
diff --git a/kernel/src/syscall/fcntl.rs b/kernel/src/syscall/fcntl.rs
index 0427a382..4343bb84 100644
--- a/kernel/src/syscall/fcntl.rs
+++ b/kernel/src/syscall/fcntl.rs
@@ -253,12 +253,8 @@ pub fn do_fcntl(
 		F_GETPIPE_SZ => {
 			let file_mutex = fds.get_fd(fd)?.get_file();
 			let file = file_mutex.lock();
-			match file.get_type()? {
-				FileType::Fifo => {
-					let buf = buffer::get_or_default::<PipeBuffer>(&file.get_location())?;
-					let buf: &PipeBuffer = (&*buf as &dyn Any).downcast_ref().unwrap();
-					Ok(buf.get_capacity() as _)
-				}
+			match file.get_buffer::<PipeBuffer>() {
+				Some(fifo) => Ok(fifo.get_capacity() as _),
 				_ => Ok(0),
 			}
 		}
diff --git a/kernel/src/syscall/getsockname.rs b/kernel/src/syscall/getsockname.rs
index b0342876..97b21fd5 100644
--- a/kernel/src/syscall/getsockname.rs
+++ b/kernel/src/syscall/getsockname.rs
@@ -39,17 +39,9 @@ pub fn getsockname(
 	fds: Arc<Mutex<FileDescriptorTable>>,
 ) -> EResult<usize> {
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	// Read and check buffer length
 	let addrlen_val = addrlen.copy_from_user()?.ok_or_else(|| errno!(EFAULT))?;
 	if addrlen_val < 0 {
diff --git a/kernel/src/syscall/getsockopt.rs b/kernel/src/syscall/getsockopt.rs
index 78596d7d..c37914d5 100644
--- a/kernel/src/syscall/getsockopt.rs
+++ b/kernel/src/syscall/getsockopt.rs
@@ -42,17 +42,9 @@ pub fn getsockopt(
 	fds: Arc<Mutex<FileDescriptorTable>>,
 ) -> EResult<usize> {
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	let val = sock.get_opt(level, optname)?;
 	// Write back
 	let len = min(val.len(), optlen);
diff --git a/kernel/src/syscall/sendto.rs b/kernel/src/syscall/sendto.rs
index c8013a18..da596a76 100644
--- a/kernel/src/syscall/sendto.rs
+++ b/kernel/src/syscall/sendto.rs
@@ -49,17 +49,9 @@ pub fn sendto(
 		return Err(errno!(EINVAL));
 	}
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let _sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let _sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	// Get slices
 	let _buf_slice = buf.copy_from_user(..len)?.ok_or(errno!(EFAULT))?;
 	let _dest_addr_slice = dest_addr
diff --git a/kernel/src/syscall/setsockopt.rs b/kernel/src/syscall/setsockopt.rs
index 59cf5034..ad98779e 100644
--- a/kernel/src/syscall/setsockopt.rs
+++ b/kernel/src/syscall/setsockopt.rs
@@ -42,17 +42,9 @@ pub fn setsockopt(
 	fds: Arc<Mutex<FileDescriptorTable>>,
 ) -> EResult<usize> {
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	// Set opt
 	let optval_slice = optval.copy_from_user(..optlen)?.ok_or(errno!(EFAULT))?;
 	sock.set_opt(level, optname, &optval_slice)
diff --git a/kernel/src/syscall/shutdown.rs b/kernel/src/syscall/shutdown.rs
index 09f4f04f..543be6fe 100644
--- a/kernel/src/syscall/shutdown.rs
+++ b/kernel/src/syscall/shutdown.rs
@@ -43,17 +43,9 @@ pub fn shutdown(
 	fds: Arc<Mutex<FileDescriptorTable>>,
 ) -> EResult<usize> {
 	// Get socket
-	let loc = fds
-		.lock()
-		.get_fd(sockfd)?
-		.get_file()
-		.lock()
-		.get_location()
-		.clone();
-	let sock = buffer::get(&loc).ok_or_else(|| errno!(ENOENT))?;
-	let sock = (&*sock as &dyn Any)
-		.downcast_ref::<Socket>()
-		.ok_or_else(|| errno!(ENOTSOCK))?;
+	let file_mutex = fds.lock().get_fd(sockfd)?.get_file().clone();
+	let file = file_mutex.lock();
+	let sock: &Socket = file.get_buffer().ok_or_else(|| errno!(ENOTSOCK))?;
 	// Do shutdown
 	match how {
 		SHUT_RD => sock.shutdown_reception(),