syscall: add sock_shutdown()

Signed-off-by: Anhad Singh <[email protected]>

src/aero_kernel/src/fs/inode.rs

@@ -157,6 +157,10 @@ pub trait INodeInterface: Send + Sync {
         Ok(aero_syscall::Stat::default())
     }
 
+    fn shutdown(&self, _how: usize) -> Result<()> {
+        Err(FileSystemError::NotSupported)
+    }
+
     /// Creates a new dev inode with the provided `name` and the device `marker` in
     /// the filesystem.
     ///
@@ -268,6 +272,10 @@ pub trait INodeInterface: Send + Sync {
     }
 }
 
+pub trait Socket: INodeInterface {
+    fn is_connected(&self) -> bool;
+}
+
 /// Structure representing the crucial, characteristics of an inode. The metadata
 /// of an inode can be retrieved by invoking the [INodeInterface::metadata] function.
 #[derive(Debug, Copy, Clone)]

src/aero_kernel/src/socket/unix.rs

@@ -434,4 +434,9 @@ impl INodeInterface for UnixSocket {
 
         Ok(events)
     }
+
+    fn shutdown(&self, how: usize) -> fs::Result<()> {
+        log::warn!("shutdown how={how}");
+        Ok(())
+    }
 }

src/aero_kernel/src/syscall/mod.rs

@@ -289,6 +289,7 @@ pub fn generic_do_syscall(
         SYS_SOCK_RECV => net::sock_recv(b, c, d),
         SYS_SOCK_SEND => net::sock_send(b, c, d),
         SYS_SOCKET_PAIR => net::socket_pair(b, c, d, e),
+        SYS_SOCK_SHUTDOWN => net::shutdown(b, c),
 
         SYS_GETTIME => time::gettime(b, c),
         SYS_SLEEP => time::sleep(b),

src/aero_kernel/src/syscall/net.rs

@@ -23,6 +23,15 @@ fn socket_addr_from_addr<'sys>(address: VirtAddr) -> Result<SocketAddr<'sys>, Sy
     SocketAddr::from_family(address, family)
 }
 
+#[syscall]
+pub fn shutdown(fd: usize, how: usize) -> Result<usize, SyscallError> {
+    let file_table = &scheduler::get_scheduler().current_task().file_table;
+    let socket = file_table.get_handle(fd).ok_or(SyscallError::EINVAL)?;
+
+    socket.inode().shutdown(how)?;
+    Ok(0)
+}
+
 /// Connects the socket to the specified address.
 #[syscall]
 pub fn connect(fd: usize, address: usize, length: usize) -> Result<usize, SyscallError> {

src/aero_syscall/src/consts.rs

@@ -95,6 +95,7 @@ pub const SYS_TRACE: usize = 71;
 pub const SYS_SETPGID: usize = 72;
 pub const SYS_SETSID: usize = 73;
 pub const SYS_GETPGID: usize = 74;
+pub const SYS_SOCK_SHUTDOWN: usize = 75;
 
 // constants for fcntl()'s command argument:
 pub const F_DUPFD: usize = 1;