حاوية bus

// ─────────────────────────────────────────────────────────────────────
//  Forward a request to FS_Vault and return its response
// ─────────────────────────────────────────────────────────────────────
fn forward_to_fs(req: &IpcMessage, ipc_buf: *mut usize) -> IpcMessage {
    let sender = unsafe { Sender::new(FS_EP_CAP, ipc_buf) };
    sender.send_recv(req).unwrap_or(IpcMessage::new(MessageTag::Err))
}

// مثال: كيف تتعامل Bus_Vault مع أمر "نقل الملف" (MoveFile)
MessageTag::MoveFile => {
    print("[Bus_Vault] → MoveFile → FS_Vault (Copy + Delete)\n");
    // 1- CopyFile
    let mut copy_req = IpcMessage::new(MessageTag::CopyFile);
    copy_req.payload = req.payload;
    copy_req.payload_len = req.payload_len;
    copy_req.mr[1] = req.mr[1]; // Source
    copy_req.mr[2] = req.mr[2]; // Dest
    let copy_resp = forward_to_fs(&copy_req, ipc_buf);
    
    // 2- DeleteFile (If Copy Succeeds)
    if copy_resp.tag == MessageTag::Ok {
        let mut del_req = IpcMessage::new(MessageTag::DeleteFile);
        del_req.mr[1] = req.mr[1];
        forward_to_fs(&del_req, ipc_buf);
    }
    resp = copy_resp;
}