Kernel: Split the TmpFS core files into smaller components

Kernel/FileSystem/TmpFS/FileSystem.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/FileSystem/TmpFS/FileSystem.h>
+#include <Kernel/FileSystem/TmpFS/Inode.h>
+
+namespace Kernel {
+
+ErrorOr<NonnullLockRefPtr<FileSystem>> TmpFS::try_create()
+{
+    return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) TmpFS));
+}
+
+TmpFS::TmpFS() = default;
+TmpFS::~TmpFS() = default;
+
+ErrorOr<void> TmpFS::initialize()
+{
+    m_root_inode = TRY(TmpFSInode::try_create_root(*this));
+    return {};
+}
+
+Inode& TmpFS::root_inode()
+{
+    VERIFY(!m_root_inode.is_null());
+    return *m_root_inode;
+}
+
+unsigned TmpFS::next_inode_index()
+{
+    MutexLocker locker(m_lock);
+
+    return m_next_inode_index++;
+}
+
+}