From 280d5feac94e8053dbd9bfeae6e7520dba77ae0d Mon Sep 17 00:00:00 2001
From: implicitfield <114500360+implicitfield@users.noreply.github.com>
Date: Wed, 3 Jan 2024 17:04:14 +0400
Subject: [PATCH] Kernel/Ext2: Allow checking for the presence of extended
 attributes

---
 Kernel/FileSystem/Ext2FS/FileSystem.cpp | 7 +++++++
 Kernel/FileSystem/Ext2FS/FileSystem.h   | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/Kernel/FileSystem/Ext2FS/FileSystem.cpp b/Kernel/FileSystem/Ext2FS/FileSystem.cpp
index 7dc9ff3ac70890..63dd488f981296 100644
--- a/Kernel/FileSystem/Ext2FS/FileSystem.cpp
+++ b/Kernel/FileSystem/Ext2FS/FileSystem.cpp
@@ -214,6 +214,13 @@ u8 Ext2FS::internal_file_type_to_directory_entry_type(DirectoryEntryView const&
     }
 }
 
+Ext2FS::FeaturesOptional Ext2FS::get_features_optional() const
+{
+    if (m_super_block.s_rev_level > 0)
+        return static_cast<Ext2FS::FeaturesOptional>(m_super_block.s_feature_compat);
+    return Ext2FS::FeaturesOptional::None;
+}
+
 Ext2FS::FeaturesReadOnly Ext2FS::get_features_readonly() const
 {
     if (m_super_block.s_rev_level > 0)
diff --git a/Kernel/FileSystem/Ext2FS/FileSystem.h b/Kernel/FileSystem/Ext2FS/FileSystem.h
index 586346028cd21b..3240638135dc2f 100644
--- a/Kernel/FileSystem/Ext2FS/FileSystem.h
+++ b/Kernel/FileSystem/Ext2FS/FileSystem.h
@@ -22,6 +22,13 @@ class Ext2FS final : public BlockBasedFileSystem {
     friend class Ext2FSInode;
 
 public:
+    // s_feature_compat
+    enum class FeaturesOptional : u32 {
+        None = 0,
+        ExtendedAttributes = EXT2_FEATURE_COMPAT_EXT_ATTR,
+    };
+    AK_ENUM_BITWISE_FRIEND_OPERATORS(FeaturesOptional);
+
     // s_feature_ro_compat
     enum class FeaturesReadOnly : u32 {
         None = 0,
@@ -43,6 +50,7 @@ class Ext2FS final : public BlockBasedFileSystem {
 
     virtual u8 internal_file_type_to_directory_entry_type(DirectoryEntryView const& entry) const override;
 
+    FeaturesOptional get_features_optional() const;
     FeaturesReadOnly get_features_readonly() const;
 
     virtual StringView class_name() const override { return "Ext2FS"sv; }