From ba63fbfc2bb43a6f0f05b6b49fd51fd6c89a0861 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Sat, 21 Mar 2026 00:28:17 +0100
Subject: refactor file and inode architecture again

---
 kernel/include/kernel/filesystem/device_file.hpp     |  6 ++++--
 kernel/include/kernel/filesystem/device_inode.hpp    |  7 +++++--
 kernel/include/kernel/filesystem/disk_file.hpp       | 19 -------------------
 kernel/include/kernel/filesystem/ext2/ext2_file.hpp  |  8 +++-----
 kernel/include/kernel/filesystem/ext2/ext2_inode.hpp |  9 +++++----
 kernel/include/kernel/filesystem/file.hpp            |  8 ++++++++
 kernel/include/kernel/filesystem/inode.hpp           |  8 ++++----
 kernel/include/kernel/filesystem/inode_file.hpp      |  9 ++++-----
 8 files changed, 33 insertions(+), 41 deletions(-)
 delete mode 100644 kernel/include/kernel/filesystem/disk_file.hpp

(limited to 'kernel/include')

diff --git a/kernel/include/kernel/filesystem/device_file.hpp b/kernel/include/kernel/filesystem/device_file.hpp
index ff803f8..22ddb49 100644
--- a/kernel/include/kernel/filesystem/device_file.hpp
+++ b/kernel/include/kernel/filesystem/device_file.hpp
@@ -11,9 +11,11 @@
 
 namespace filesystem
 {
+  struct inode;
+
   struct device_file : file
   {
-    explicit device_file(kstd::shared_ptr<devices::device> const & device);
+    explicit device_file(kstd::shared_ptr<inode> const & inode);
 
     auto read(void * buffer, size_t offset, size_t size) const -> size_t override;
     auto write(void const * buffer, size_t offset, size_t size) -> size_t override;
@@ -23,7 +25,7 @@ namespace filesystem
                               std::byte * scratch, void * buffer);
     auto process_blocks(size_t offset, size_t size, void * buffer, block_op op) const -> size_t;
 
-    kstd::shared_ptr<devices::device> m_device;
+    [[nodiscard]] auto device() const -> kstd::shared_ptr<devices::device> const &;
   };
 }  // namespace filesystem
 
diff --git a/kernel/include/kernel/filesystem/device_inode.hpp b/kernel/include/kernel/filesystem/device_inode.hpp
index c38c75b..af2a51b 100644
--- a/kernel/include/kernel/filesystem/device_inode.hpp
+++ b/kernel/include/kernel/filesystem/device_inode.hpp
@@ -2,18 +2,21 @@
 #define TEACH_OS_KERNEL_FILESYSTEM_DEVICE_INODE_HPP
 
 #include "kernel/devices/device.hpp"
-#include "kernel/filesystem/file.hpp"
 #include "kernel/filesystem/inode.hpp"
 
 #include <kstd/memory>
 
 namespace filesystem
 {
+  struct file;
+
   struct device_inode : inode
   {
     explicit device_inode(kstd::shared_ptr<devices::device> const & device);
 
-    [[nodiscard]] auto open_file() const -> kstd::shared_ptr<file> override;
+    [[nodiscard]] auto open_file(kstd::shared_ptr<inode> const & self) const -> kstd::shared_ptr<file> override;
+
+    [[nodiscard]] auto device() const -> kstd::shared_ptr<devices::device> const &;
 
   private:
     kstd::shared_ptr<devices::device> m_device{};
diff --git a/kernel/include/kernel/filesystem/disk_file.hpp b/kernel/include/kernel/filesystem/disk_file.hpp
deleted file mode 100644
index c6a7655..0000000
--- a/kernel/include/kernel/filesystem/disk_file.hpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef TEACH_OS_KERNEL_FILESYSTEM_DISK_FILE_HPP
-#define TEACH_OS_KERNEL_FILESYSTEM_DISK_FILE_HPP
-
-#include <kstd/memory>
-
-#include <cstddef>
-
-namespace filesystem
-{
-  struct disk_file
-  {
-    virtual ~disk_file() = default;
-
-    virtual auto read(void * buffer, size_t offset, size_t size) const -> size_t = 0;
-    virtual auto write(void const * buffer, size_t offset, size_t size) -> size_t = 0;
-  };
-}  // namespace filesystem
-
-#endif
\ No newline at end of file
diff --git a/kernel/include/kernel/filesystem/ext2/ext2_file.hpp b/kernel/include/kernel/filesystem/ext2/ext2_file.hpp
index 371507d..e5357e3 100644
--- a/kernel/include/kernel/filesystem/ext2/ext2_file.hpp
+++ b/kernel/include/kernel/filesystem/ext2/ext2_file.hpp
@@ -1,16 +1,14 @@
 #ifndef TEACH_OS_KERNEL_FILESYSTEM_EXT2_FILE_HPP
 #define TEACH_OS_KERNEL_FILESYSTEM_EXT2_FILE_HPP
 
-#include "kernel/filesystem/disk_file.hpp"
-
 #include <cstddef>
 
 namespace filesystem::ext2
 {
-  struct ext2_file : disk_file
+  struct ext2_file
   {
-    auto read(void * buffer, size_t offset, size_t size) const -> size_t override;
-    auto write(void const * buffer, size_t offset, size_t size) -> size_t override;
+    auto read(void * buffer, size_t offset, size_t size) const -> size_t;
+    auto write(void const * buffer, size_t offset, size_t size) -> size_t;
   };
 }  // namespace filesystem::ext2
 
diff --git a/kernel/include/kernel/filesystem/ext2/ext2_inode.hpp b/kernel/include/kernel/filesystem/ext2/ext2_inode.hpp
index 7b5ff3f..b57d267 100644
--- a/kernel/include/kernel/filesystem/ext2/ext2_inode.hpp
+++ b/kernel/include/kernel/filesystem/ext2/ext2_inode.hpp
@@ -1,7 +1,7 @@
 #ifndef TEACH_OS_KERNEL_FILESYSTEM_EXT2_INODE_HPP
 #define TEACH_OS_KERNEL_FILESYSTEM_EXT2_INODE_HPP
 
-#include "kernel/filesystem/disk_file.hpp"
+#include "kernel/filesystem/ext2/ext2_file.hpp"
 #include "kernel/filesystem/file.hpp"
 #include "kernel/filesystem/inode.hpp"
 
@@ -11,12 +11,13 @@ namespace filesystem::ext2
 {
   struct ext2_inode : inode
   {
-    explicit ext2_inode(kstd::shared_ptr<disk_file> const & disk_file);
+    explicit ext2_inode();
 
-    [[nodiscard]] auto open_file() const -> kstd::shared_ptr<file> override;
+    [[nodiscard]] auto open_file(kstd::shared_ptr<inode> const & self) const
+        -> kstd::shared_ptr<filesystem::file> override;
 
   private:
-    kstd::shared_ptr<disk_file> m_disk_file{};
+    kstd::shared_ptr<ext2_file> m_file{};
   };
 }  // namespace filesystem::ext2
 
diff --git a/kernel/include/kernel/filesystem/file.hpp b/kernel/include/kernel/filesystem/file.hpp
index 5a41fab..522f078 100644
--- a/kernel/include/kernel/filesystem/file.hpp
+++ b/kernel/include/kernel/filesystem/file.hpp
@@ -1,16 +1,24 @@
 #ifndef TEACH_OS_KERNEL_FILESYSTEM_FILE_HPP
 #define TEACH_OS_KERNEL_FILESYSTEM_FILE_HPP
 
+#include <kstd/memory>
+
 #include <cstddef>
 
 namespace filesystem
 {
+  struct inode; 
+
   struct file
   {
+    explicit file(kstd::shared_ptr<inode> const & inode);
     virtual ~file() = default;
 
     virtual auto read(void * buffer, size_t offset, size_t size) const -> size_t = 0;
     virtual auto write(void const * buffer, size_t offset, size_t size) -> size_t = 0;
+
+  protected:
+    kstd::shared_ptr<inode> m_inode;
   };
 }  // namespace filesystem
 
diff --git a/kernel/include/kernel/filesystem/inode.hpp b/kernel/include/kernel/filesystem/inode.hpp
index 79cbcf9..8c9f75e 100644
--- a/kernel/include/kernel/filesystem/inode.hpp
+++ b/kernel/include/kernel/filesystem/inode.hpp
@@ -1,12 +1,12 @@
 #ifndef TEACH_OS_KERNEL_FILESYSTEM_INODE_HPP
 #define TEACH_OS_KERNEL_FILESYSTEM_INODE_HPP
 
-#include "kernel/filesystem/file.hpp"
-
 #include <kstd/memory>
 
 namespace filesystem
 {
+  struct file;
+
   struct inode
   {
     enum class inode_kind
@@ -20,12 +20,12 @@ namespace filesystem
 
     virtual ~inode() = default;
 
+    [[nodiscard]] virtual auto open_file(kstd::shared_ptr<inode> const & self) const -> kstd::shared_ptr<file> = 0;
+
     [[nodiscard]] auto is_directory() const -> bool;
     [[nodiscard]] auto is_regular() const -> bool;
     [[nodiscard]] auto is_device() const -> bool;
 
-    [[nodiscard]] virtual auto open_file() const -> kstd::shared_ptr<file> = 0;
-
   private:
     inode_kind m_kind{inode_kind::regular};
   };
diff --git a/kernel/include/kernel/filesystem/inode_file.hpp b/kernel/include/kernel/filesystem/inode_file.hpp
index 3e2b954..f87b77c 100644
--- a/kernel/include/kernel/filesystem/inode_file.hpp
+++ b/kernel/include/kernel/filesystem/inode_file.hpp
@@ -1,8 +1,8 @@
 #ifndef TEACH_OS_KERNEL_FILESYSTEM_INODE_FILE_HPP
 #define TEACH_OS_KERNEL_FILESYSTEM_INODE_FILE_HPP
 
-#include "kernel/filesystem/disk_file.hpp"
 #include "kernel/filesystem/file.hpp"
+#include "kernel/filesystem/inode.hpp"
 
 #include <kstd/memory>
 
@@ -10,15 +10,14 @@
 
 namespace filesystem
 {
+  struct inode;
+
   struct inode_file : file
   {
-    explicit inode_file(kstd::shared_ptr<disk_file> const & disk_file);
+    explicit inode_file(kstd::shared_ptr<inode> const & inode);
 
     auto read(void * buffer, size_t offset, size_t size) const -> size_t override;
     auto write(void const * buffer, size_t offset, size_t size) -> size_t override;
-
-  private:
-    kstd::shared_ptr<disk_file> m_disk_file;
   };
 }  // namespace filesystem
 
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