jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/Error.h>
10#include <AK/IntrusiveList.h>
11#include <AK/RefPtr.h>
12#include <Kernel/Forward.h>
13#include <Kernel/KString.h>
14#include <Kernel/Library/ListedRefCounted.h>
15#include <Kernel/Locking/SpinlockProtected.h>
16
17namespace Kernel {
18
19class Custody final : public ListedRefCounted<Custody, LockType::Spinlock> {
20public:
21 static ErrorOr<NonnullRefPtr<Custody>> try_create(Custody* parent, StringView name, Inode&, int mount_flags);
22
23 ~Custody();
24
25 RefPtr<Custody> parent() { return m_parent; }
26 RefPtr<Custody const> parent() const { return m_parent; }
27 Inode& inode() { return *m_inode; }
28 Inode const& inode() const { return *m_inode; }
29 StringView name() const { return m_name->view(); }
30 ErrorOr<NonnullOwnPtr<KString>> try_serialize_absolute_path() const;
31
32 int mount_flags() const { return m_mount_flags; }
33 bool is_readonly() const;
34
35private:
36 Custody(Custody* parent, NonnullOwnPtr<KString> name, Inode&, int mount_flags);
37
38 RefPtr<Custody> m_parent;
39 NonnullOwnPtr<KString> m_name;
40 NonnullRefPtr<Inode> m_inode;
41 int m_mount_flags { 0 };
42
43 mutable IntrusiveListNode<Custody> m_all_custodies_list_node;
44
45public:
46 using AllCustodiesList = IntrusiveList<&Custody::m_all_custodies_list_node>;
47 static SpinlockProtected<Custody::AllCustodiesList, LockRank::None>& all_instances();
48};
49
50}