From 62005f563e3c29b079c69380905a82fd0d91c975 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Mon, 16 Mar 2026 18:27:59 +0100
Subject: add first draft of inode metadata

---
 kernel/filesystem/src/ext2/ext2_filesystem.cpp | 14 +++++++++--
 kernel/filesystem/src/filesystem.cpp           |  9 +++++--
 kernel/filesystem/src/inode.cpp                | 34 ++++++++++++++++++++++++--
 3 files changed, 51 insertions(+), 6 deletions(-)

(limited to 'kernel/filesystem/src')

diff --git a/kernel/filesystem/src/ext2/ext2_filesystem.cpp b/kernel/filesystem/src/ext2/ext2_filesystem.cpp
index 97257a2..f092ddf 100644
--- a/kernel/filesystem/src/ext2/ext2_filesystem.cpp
+++ b/kernel/filesystem/src/ext2/ext2_filesystem.cpp
@@ -3,6 +3,8 @@
 #include "devices/device.hpp"
 #include "filesystem/inode.hpp"
 
+#include <string_view>
+
 namespace filesystem::ext2
 {
   auto ext2_filesystem::mount(devices::device * device) -> int
@@ -12,9 +14,17 @@ namespace filesystem::ext2
       return -1;  // TODO BA-FS26 panic or errorcode?
     }
 
-    m_root_inode = inode{};  // TODO BA-FS26 set properly during mount?
+    m_device = device;
+    // TODO BA-FS26 load proper root inode from ext2 metadata
+    m_root_inode = inode{inode_kind::directory};
 
     // TODO BA-FS26 implement
     return 0;
   }
-}  // namespace filesystem::ext2
\ No newline at end of file
+
+  auto ext2_filesystem::lookup(inode const & /*parent*/, std::string_view /*name*/) -> inode *
+  {
+    // TODO BA-FS26 implement ext2 directory traversal and inode loading
+    return nullptr;
+  }
+}  // namespace filesystem::ext2
diff --git a/kernel/filesystem/src/filesystem.cpp b/kernel/filesystem/src/filesystem.cpp
index cdfe7f8..a06bccc 100644
--- a/kernel/filesystem/src/filesystem.cpp
+++ b/kernel/filesystem/src/filesystem.cpp
@@ -4,8 +4,13 @@
 
 namespace filesystem
 {
-  auto filesystem::root_inode() const -> inode const &
+  auto filesystem::root_inode() -> inode *
   {
-    return m_root_inode;
+    return &m_root_inode;
+  }
+
+  auto filesystem::root_inode() const -> inode const *
+  {
+    return &m_root_inode;
   }
 }  // namespace filesystem
\ No newline at end of file
diff --git a/kernel/filesystem/src/inode.cpp b/kernel/filesystem/src/inode.cpp
index a1427e2..17aa52a 100644
--- a/kernel/filesystem/src/inode.cpp
+++ b/kernel/filesystem/src/inode.cpp
@@ -3,13 +3,19 @@
 #include "kapi/system.hpp"
 
 #include "devices/device.hpp"
+#include "filesystem/inode_metadata.hpp"
 
 #include <cstddef>
 
 namespace filesystem
 {
+  inode::inode(inode_kind kind)
+      : m_kind(kind)
+  {}
+
   inode::inode(devices::device * device)
-      : m_device(device)
+      : m_kind(inode_kind::device)
+      , m_device(device)
   {
     if (!m_device)
     {
@@ -17,9 +23,33 @@ namespace filesystem
     }
   }
 
+  auto inode::metadata() const -> inode_metadata
+  {
+    auto meta = inode_metadata{};
+    meta.kind = m_kind;
+
+    if (is_device())
+    {
+      meta.major = m_device->major();
+      meta.minor = m_device->minor();
+    }
+
+    return meta;
+  }
+
+  auto inode::is_directory() const -> bool
+  {
+    return m_kind == inode_kind::directory;
+  }
+
+  auto inode::is_regular() const -> bool
+  {
+    return m_kind == inode_kind::regular;
+  }
+
   auto inode::is_device() const -> bool
   {
-    return m_device != nullptr;
+    return m_kind == inode_kind::device;
   }
 
   auto inode::is_block_device() const -> bool
-- 
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