From 35175463977f85d949b2168a4f062158d2a911d1 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Wed, 26 Aug 2026 14:45:31 +0200
Subject: kernel/fs: ext2: move superblock flags

---
 kernel/kernel/filesystem/ext2/filesystem.cpp |  4 +--
 kernel/kernel/filesystem/ext2/filesystem.hpp | 22 ---------------
 kernel/kernel/filesystem/ext2/superblock.hpp | 42 ++++++++++++++++++++++++++--
 3 files changed, 41 insertions(+), 27 deletions(-)

(limited to 'kernel')

diff --git a/kernel/kernel/filesystem/ext2/filesystem.cpp b/kernel/kernel/filesystem/ext2/filesystem.cpp
index bf977c46..4f5ff686 100644
--- a/kernel/kernel/filesystem/ext2/filesystem.cpp
+++ b/kernel/kernel/filesystem/ext2/filesystem.cpp
@@ -133,8 +133,8 @@ namespace kernel::filesystem::ext2
       return kstd::failure(ext2_errc::invalid_magic_number);
     }
 
-    if (superblock.feature_incompat & std::to_underlying(~supported_incompatible_features) ||
-        superblock.feature_ro_compat & std::to_underlying(~supported_ro_compatible_features))
+    if (std::to_underlying(superblock.feature_incompat & ~supported_incompatible_features) ||
+        std::to_underlying(superblock.feature_ro_compat & ~supported_ro_compatible_features))
     {
       return kstd::failure(ext2_errc::unsupported_features_present);
     }
diff --git a/kernel/kernel/filesystem/ext2/filesystem.hpp b/kernel/kernel/filesystem/ext2/filesystem.hpp
index 6d5720a2..66db7589 100644
--- a/kernel/kernel/filesystem/ext2/filesystem.hpp
+++ b/kernel/kernel/filesystem/ext2/filesystem.hpp
@@ -57,28 +57,6 @@ namespace kernel::filesystem::ext2
 
   }  // namespace constants
 
-  //! Ext2 incompatibility features
-  //!
-  //! These enumerators describe the flags that might not be supported by an ext2 driver.
-  enum struct incompatible_features
-  {
-    compression = 0x0001,
-    file_types_in_directory_entries = 0x0002,
-    recovery = 0x0004,
-    external_journal_device = 0x0008,
-    meta_block_group_layout = 0x0010,
-  };
-
-  //! Ext2 read-only compatible features
-  //!
-  //! There enumerators describe the flags that might prevent read-write access for a driver.
-  enum struct read_only_compatible_features
-  {
-    sparse_superblock_copies = 0x0001,
-    large_file_support = 0x0002,
-    binary_tree_directories = 0x0003,
-  };
-
   //! The Second Extended Filesystem (ext2)
   struct filesystem final : kernel::filesystem::filesystem
   {
diff --git a/kernel/kernel/filesystem/ext2/superblock.hpp b/kernel/kernel/filesystem/ext2/superblock.hpp
index 0fe5d4e5..e5cd845b 100644
--- a/kernel/kernel/filesystem/ext2/superblock.hpp
+++ b/kernel/kernel/filesystem/ext2/superblock.hpp
@@ -6,6 +6,42 @@
 
 namespace kernel::filesystem::ext2
 {
+
+  //! Ext2 compatible features.
+  //!
+  //! These enumerators describe the flags that may be ignored by the an ext2 driver.
+  enum struct compatible_features : std::uint32_t
+  {
+    directory_preallocation = 1 << 0,
+    magic_inodes = 1 << 1,
+    ext3_journal = 1 << 2,
+    extended_attributes = 1 << 3,
+    non_standard_inode_size = 1 << 4,
+    hashed_directory_indexing = 1 << 5,
+  };
+
+  //! Ext2 incompatibility features
+  //!
+  //! These enumerators describe the flags that might not be supported by an ext2 driver.
+  enum struct incompatible_features : std::uint32_t
+  {
+    compression = 1 << 0,
+    file_types_in_directory_entries = 1 << 1,
+    journal_recovery_required = 1 << 2,
+    external_journal_device = 1 << 3,
+    meta_block_group_layout = 1 << 4,
+  };
+
+  //! Ext2 read-only compatible features
+  //!
+  //! There enumerators describe the flags that might prevent read-write access for a driver.
+  enum struct read_only_compatible_features : std::uint32_t
+  {
+    sparse_superblock_copies = 1 << 0,
+    large_file_support = 1 << 1,
+    binary_tree_directories = 1 << 2,
+  };
+
   //! The superblock in the ext2 filesystem.
   struct [[gnu::packed]] superblock
   {
@@ -39,9 +75,9 @@ namespace kernel::filesystem::ext2
     uint32_t first_ino;
     uint16_t inode_size;
     uint16_t block_group_nr;
-    uint32_t feature_compat;
-    uint32_t feature_incompat;
-    uint32_t feature_ro_compat;
+    compatible_features feature_compat;
+    incompatible_features feature_incompat;
+    read_only_compatible_features feature_ro_compat;
     std::array<uint8_t, 16> uuid;
     std::array<uint8_t, 16> volume_name;
     std::array<uint8_t, 64> last_mounted;
-- 
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