Kernel/TmpFS: Use IntrusiveList and KString for OOM safety

This patch moves TmpFS to using OOM-safe data types for storing
directory children.

1 files changed, 11 insertions, 6 deletions

diff --git a/Kernel/FileSystem/TmpFS.h b/Kernel/FileSystem/TmpFS.h
index c57a5e23ec..20e2ca51d2 100644
--- a/Kernel/FileSystem/TmpFS.h
+++ b/Kernel/FileSystem/TmpFS.h
@@ -75,18 +75,23 @@ private:
     TmpFSInode(TmpFS& fs, InodeMetadata metadata, InodeIdentifier parent);
     static RefPtr<TmpFSInode> create(TmpFS&, InodeMetadata metadata, InodeIdentifier parent);
     static RefPtr<TmpFSInode> create_root(TmpFS&);
-
     void notify_watchers();
 
+    struct Child {
+        NonnullOwnPtr<KString> name;
+        NonnullRefPtr<TmpFSInode> inode;
+        IntrusiveListNode<Child> list_node {};
+        using List = IntrusiveList<Child, RawPtr<Child>, &Child::list_node>;
+    };
+
+    Child* find_child_by_name(StringView);
+
     InodeMetadata m_metadata;
     InodeIdentifier m_parent;
 
     OwnPtr<KBuffer> m_content;
-    struct Child {
-        String name;
-        NonnullRefPtr<TmpFSInode> inode;
-    };
-    HashMap<String, Child> m_children;
+
+    Child::List m_children;
 };
 
 }