implement read and write bytes from device

2 files changed, 31 insertions, 0 deletions

diff --git a/kernel/devices/include/devices/block_device.hpp b/kernel/devices/include/devices/block_device.hpp
index 78a2606..9bca53f 100644
--- a/kernel/devices/include/devices/block_device.hpp
+++ b/kernel/devices/include/devices/block_device.hpp
@@ -46,6 +46,28 @@ namespace devices
      */
     virtual auto write_block(size_t block_index, void const * buffer) -> void = 0;
 
+    /**
+     * @brief Return logical block size in bytes.
+     * @return One logical block size in bytes.
+     */
+    auto block_size() const -> size_t;
+
+    /**
+     * @brief Return device capacity in bytes.
+     * @return Total number of addressable bytes.
+     */
+    auto capacity() const -> size_t;
+
+    /**
+     * @brief Override to identify block devices.
+     * @return true if this device is a block device, false otherwise.
+     */
+
+    auto is_block_device() const -> bool override
+    {
+      return true;
+    }
+
   protected:
     /**
      * @brief Information describing the transfer window for one block index.
diff --git a/kernel/devices/include/devices/device.hpp b/kernel/devices/include/devices/device.hpp
index cbf77c2..7f9f9e1 100644
--- a/kernel/devices/include/devices/device.hpp
+++ b/kernel/devices/include/devices/device.hpp
@@ -34,6 +34,15 @@ namespace devices
      */
     auto minor() const -> size_t;
 
+    /**
+     * @brief Check if the device is a block device.
+     * @return true if this device is a block device, false otherwise.
+     */
+    virtual auto is_block_device() const -> bool
+    {
+      return false;
+    }
+
   private:
     size_t m_major;
     size_t m_minor;