Add method that returns the next ancestor with mount flag set

2 files changed, 16 insertions, 0 deletions

diff --git a/kernel/include/kernel/filesystem/dentry.hpp b/kernel/include/kernel/filesystem/dentry.hpp
index 226f2b9..1d99a25 100644
--- a/kernel/include/kernel/filesystem/dentry.hpp
+++ b/kernel/include/kernel/filesystem/dentry.hpp
@@ -61,6 +61,12 @@ namespace kernel::filesystem
     [[nodiscard]] auto get_absolute_path() const -> kstd::string;
 
     /**
+    @brief traverse parent dentries until dentry with mount flag is found.
+    @return The found dentry.
+    */
+    [[nodiscard]] auto get_ancestor_with_mount_flag() const -> kstd::shared_ptr<dentry>;
+
+    /**
     @brief Add a @p child dentry.
     @param child The child dentry to add.
     */
diff --git a/kernel/src/filesystem/dentry.cpp b/kernel/src/filesystem/dentry.cpp
index a77ce23..6945a27 100644
--- a/kernel/src/filesystem/dentry.cpp
+++ b/kernel/src/filesystem/dentry.cpp
@@ -66,6 +66,16 @@ namespace kernel::filesystem
     return path;
   }
 
+  auto dentry::get_ancestor_with_mount_flag() const -> kstd::shared_ptr<dentry>
+  {
+    auto parent = m_parent;
+    while (parent && !parent->has_flag(dentry_flags::mounted))
+    {
+      parent = parent->get_parent();
+    }
+    return parent;
+  }
+
   auto dentry::add_child(kstd::shared_ptr<dentry> const & child) -> void
   {
     m_children.push_back(child);