Add dentry structure

4 files changed, 43 insertions, 11 deletions

diff --git a/kernel/include/kernel/filesystem/dentry.hpp b/kernel/include/kernel/filesystem/dentry.hpp
index 1532880..db15b48 100644
--- a/kernel/include/kernel/filesystem/dentry.hpp
+++ b/kernel/include/kernel/filesystem/dentry.hpp
@@ -4,21 +4,35 @@
 #include "kernel/filesystem/inode.hpp"
 
 #include <kstd/memory>
+#include <kstd/string>
 #include <kstd/vector>
 
+#include <cstdint>
+
 namespace filesystem
 {
   struct dentry
   {
+    enum class dentry_flags : uint32_t
+    {
+      dcache_mounted = 1 << 15
+    };
+
     dentry(kstd::shared_ptr<dentry> const & parent, kstd::shared_ptr<inode> const & node);
 
     [[nodiscard]] auto get_inode() const -> kstd::shared_ptr<inode> const &;
     [[nodiscard]] auto get_parent() const -> kstd::shared_ptr<dentry> const &;
 
+    auto set_flag(dentry_flags flag) -> void;
+    auto unset_flag(dentry_flags flag) -> void;
+    [[nodiscard]] auto has_flag(dentry_flags flag) const -> bool;
+
   private:
+    kstd::string m_name;
     kstd::shared_ptr<dentry> m_parent;
     kstd::vector<kstd::shared_ptr<dentry>> m_children;
     kstd::shared_ptr<inode> m_inode;
+    uint32_t m_flags{0};
   };
 }  // namespace filesystem
 
diff --git a/kernel/include/kernel/filesystem/vfs.hpp b/kernel/include/kernel/filesystem/vfs.hpp
index bcf06f7..01cd2ea 100644
--- a/kernel/include/kernel/filesystem/vfs.hpp
+++ b/kernel/include/kernel/filesystem/vfs.hpp
@@ -40,7 +40,7 @@ namespace filesystem
     [[nodiscard]] auto resolve_path(std::string_view path) -> std::optional<dentry>;
 
     kstd::shared_ptr<filesystem> m_root_fs;
-    std::optional<mount> m_root_mount;
+    kstd::shared_ptr<dentry> m_root_dentry;
     kstd::vector<mount> m_mount_table;
   };
 }  // namespace filesystem
diff --git a/kernel/src/filesystem/dentry.cpp b/kernel/src/filesystem/dentry.cpp
index 08f0b25..e498b52 100644
--- a/kernel/src/filesystem/dentry.cpp
+++ b/kernel/src/filesystem/dentry.cpp
@@ -6,6 +6,8 @@
 
 #include <kstd/memory>
 
+#include <cstdint>
+
 namespace filesystem
 {
   dentry::dentry(kstd::shared_ptr<dentry> const & parent, kstd::shared_ptr<inode> const & node)
@@ -27,4 +29,19 @@ namespace filesystem
   {
     return m_parent;
   }
+
+  auto dentry::set_flag(dentry_flags flag) -> void
+  {
+    m_flags |= static_cast<uint32_t>(flag);
+  }
+
+  auto dentry::unset_flag(dentry_flags flag) -> void
+  {
+    m_flags &= ~static_cast<uint32_t>(flag);
+  }
+
+  auto dentry::has_flag(dentry_flags flag) const -> bool
+  {
+    return (m_flags & static_cast<uint32_t>(flag)) != 0;
+  }
 }  // namespace filesystem
\ No newline at end of file
diff --git a/kernel/src/filesystem/vfs.cpp b/kernel/src/filesystem/vfs.cpp
index a111f23..2c4a4d5 100644
--- a/kernel/src/filesystem/vfs.cpp
+++ b/kernel/src/filesystem/vfs.cpp
@@ -38,10 +38,11 @@ namespace filesystem
     if (auto boot_device = storage_mgmt.determine_boot_device())
     {
       active_vfs->m_root_fs = kstd::make_shared<ext2::ext2_filesystem>();
-      if (active_vfs->do_mount("/", active_vfs->m_root_fs) != 0)
-      {
-        kapi::system::panic("[FILESYSTEM] Failed to mount root filesystem.");
-      }
+      active_vfs->m_root_dentry = kstd::make_shared<dentry>(nullptr, active_vfs->m_root_fs->root_inode());
+      // if (active_vfs->do_mount("/", active_vfs->m_root_fs) != 0)
+      // {
+      //   kapi::system::panic("[FILESYSTEM] Failed to mount root filesystem.");
+      // }
 
       // TODO BA-FS26 use do_mount when tempdevfs is implemented -> just call /dev/ with all devices in devtempfs
       std::ranges::for_each(storage_mgmt.all_controllers(), [&](auto controller) {
@@ -92,12 +93,12 @@ namespace filesystem
       return -1;  // TODO BA-FS26 panic or errorcode?
     }
 
-    if (path == "/")
-    {
-      m_root_fs = filesystem;
-      m_root_mount = mount{"/", filesystem};
-      return 0;
-    }
+    // if (path == "/")
+    // {
+    //   m_root_fs = filesystem;
+    //   m_root_mount = mount{"/", filesystem};
+    //   return 0;
+    // }
 
     auto existing_mount =
         std::ranges::find_if(m_mount_table, [&](auto const & existing) { return existing.path() == path; });