From 794de4a7f8dbea164d857ae9e4525536f338518d Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Thu, 2 Apr 2026 16:06:40 +0200
Subject: temporary implementation of inode kind

---
 kernel/include/kernel/filesystem/inode.hpp |  3 ++-
 kernel/src/filesystem/ext2/filesystem.cpp  | 41 +++++++++++++++++++++---------
 2 files changed, 31 insertions(+), 13 deletions(-)

(limited to 'kernel')

diff --git a/kernel/include/kernel/filesystem/inode.hpp b/kernel/include/kernel/filesystem/inode.hpp
index d97b5ab..59207df 100644
--- a/kernel/include/kernel/filesystem/inode.hpp
+++ b/kernel/include/kernel/filesystem/inode.hpp
@@ -25,7 +25,8 @@ namespace kernel::filesystem
     [[nodiscard]] auto is_regular() const -> bool;
     [[nodiscard]] auto is_device() const -> bool;
 
-  private:
+    // TODO BA-FS26 improve inode_kind really needed?
+  public:
     inode_kind m_kind{inode_kind::regular};
   };
 }  // namespace kernel::filesystem
diff --git a/kernel/src/filesystem/ext2/filesystem.cpp b/kernel/src/filesystem/ext2/filesystem.cpp
index d650e97..31dc6f2 100644
--- a/kernel/src/filesystem/ext2/filesystem.cpp
+++ b/kernel/src/filesystem/ext2/filesystem.cpp
@@ -26,18 +26,18 @@ namespace kernel::filesystem::ext2
     constexpr uint32_t ROOT_INODE_NUMBER = 2;
 
     // Mode bits
-    // constexpr uint16_t S_IFMT = 0xF000;
-    // constexpr uint16_t S_IFREG = 0x8000;
-    // constexpr uint16_t S_IFDIR = 0x4000;
-
-    // auto S_ISREG(uint16_t mode) -> bool
-    // {
-    //   return (mode & S_IFMT) == S_IFREG;
-    // }
-    // auto S_ISDIR(uint16_t mode) -> bool
-    // {
-    //   return (mode & S_IFMT) == S_IFDIR;
-    // }
+    constexpr uint16_t S_IFMT = 0xF000;
+    constexpr uint16_t S_IFREG = 0x8000;
+    constexpr uint16_t S_IFDIR = 0x4000;
+
+    auto S_ISREG(uint16_t mode) -> bool
+    {
+      return (mode & S_IFMT) == S_IFREG;
+    }
+    auto S_ISDIR(uint16_t mode) -> bool
+    {
+      return (mode & S_IFMT) == S_IFDIR;
+    }
   }  // namespace
 
   auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> int
@@ -63,6 +63,7 @@ namespace kernel::filesystem::ext2
                                               num_block_groups * sizeof(block_group_descriptor));
 
     m_root_inode = read_inode(ROOT_INODE_NUMBER);
+    // TODO BA-FS26 check if root inode is valid and is a directory ??
     return 0;
   }
 
@@ -98,6 +99,22 @@ namespace kernel::filesystem::ext2
 
     auto new_inode = kstd::make_shared<inode>();
     kernel::devices::block_device_utils::read(m_device, &new_inode->m_data, inode_offset, sizeof(inode_data));
+
+    // TODO BA-FS26 improve inode_kind really needed? or just map it to the mode bits?
+    if (S_ISREG(new_inode->m_data.mode))
+    {
+      new_inode->m_kind = inode::inode_kind::regular;
+    }
+    else if (S_ISDIR(new_inode->m_data.mode))
+    {
+      new_inode->m_kind = inode::inode_kind::directory;
+    }
+    else
+    {
+      // TODO BA-FS26 really correct??
+      return nullptr;
+    }
+
     return new_inode;
   }
 
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