From 1d647adb1ba20121eeb5c8e4470f48b2e972b3d4 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Fri, 15 May 2026 16:50:55 +0200
Subject: Mount can only be unmounted if no references are present, increment
 references on open file and decrement on close file

---
 kernel/src/filesystem/mount.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'kernel/src/filesystem/mount.cpp')

diff --git a/kernel/src/filesystem/mount.cpp b/kernel/src/filesystem/mount.cpp
index 749c86a..3016509 100644
--- a/kernel/src/filesystem/mount.cpp
+++ b/kernel/src/filesystem/mount.cpp
@@ -18,6 +18,7 @@ namespace kernel::filesystem
       , m_root_dentry(root_dentry)
       , m_filesystem(fs)
       , m_parent_mount(parent_mount)
+      , m_ref_count(0)
   {
     if (!m_filesystem)
     {
@@ -53,4 +54,25 @@ namespace kernel::filesystem
   {
     return m_parent_mount;
   }
+
+  auto mount::increment_ref_count() -> void
+  {
+    m_ref_count += 1;
+  }
+
+  auto mount::decrement_ref_count() -> bool
+  {
+    if (m_ref_count == 0)
+    {
+      return false;
+    }
+
+    m_ref_count -= 1;
+    return true;
+  }
+
+  auto mount::is_ready_to_unmount() const -> bool
+  {
+    return m_ref_count == 0;
+  }
 }  // namespace kernel::filesystem
\ No newline at end of file
-- 
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