1 files changed, 69 insertions, 0 deletions
diff --git a/kernel/include/kernel/filesystem/inode.hpp b/kernel/include/kernel/filesystem/inode.hpp
new file mode 100644
index 0000000..b34b921
--- /dev/null
+++ b/kernel/include/kernel/filesystem/inode.hpp
@@ -0,0 +1,69 @@
+#ifndef TEACH_OS_KERNEL_FILESYSTEM_INODE_HPP
+#define TEACH_OS_KERNEL_FILESYSTEM_INODE_HPP
+
+#include <cstddef>
+
+namespace kernel::filesystem
+{
+  /**
+  @brief Represents an inode in the filesystem.
+  */
+  struct inode
+  {
+    /**
+    @brief Create an inode.
+    */
+    inode() = default;
+
+    /**
+    @brief Virtual destructor for the inode.
+    */
+    virtual ~inode() = default;
+
+    /**
+    @brief Reads from the inode into a @p buffer, starting at the specified @p offset and for a given @p size. This
+    method must be implemented by concrete inode subclasses.
+    @param buffer Destination buffer.
+    @param offset Read offset in bytes.
+    @param size Number of bytes requested.
+    @return Number of bytes read.
+    */
+    virtual auto read(void * buffer, size_t offset, size_t size) const -> size_t = 0;
+
+    /**
+    @brief Writes to the inode into a @p buffer, starting at the specified @p offset and for a given @p size. This
+    method must be implemented by concrete inode subclasses.
+    @param buffer Source buffer.
+    @param offset Write offset in bytes.
+    @param size Number of bytes to write.
+    @return Number of bytes written.
+    */
+    virtual auto write(void const * buffer, size_t offset, size_t size) -> size_t = 0;
+
+    /**
+    @brief Returns whether the inode is a directory.
+    @return true if the inode is a directory, false otherwise.
+    */
+    [[nodiscard]] virtual auto is_directory() const -> bool;
+
+    /**
+    @brief Returns whether the inode is a regular file.
+    @return true if the inode is a regular file, false otherwise.
+    */
+    [[nodiscard]] virtual auto is_regular() const -> bool;
+
+    /**
+    @brief Returns whether the inode is a device.
+    @return true if the inode is a device, false otherwise.
+    */
+    [[nodiscard]] virtual auto is_device() const -> bool;
+
+    /**
+    @brief Returns whether the inode is a symbolic link.
+    @return true if the inode is a symbolic link, false otherwise.
+    */
+    [[nodiscard]] virtual auto is_symbolic_link() const -> bool;
+  };
+}  // namespace kernel::filesystem
+
+#endif