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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/Function.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <Kernel/FileSystem/File.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Forward.h>
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namespace Kernel {
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struct SysFSInodeData : public OpenFileDescriptionData {
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OwnPtr<KBuffer> buffer;
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};
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class SysFSComponent : public RefCounted<SysFSComponent> {
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public:
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virtual StringView name() const { return m_name->view(); }
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virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const { return Error::from_errno(ENOTIMPL); }
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virtual ErrorOr<void> traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const { VERIFY_NOT_REACHED(); }
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virtual RefPtr<SysFSComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
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virtual mode_t permissions() const;
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virtual ErrorOr<void> truncate(u64) { return EPERM; }
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virtual ErrorOr<void> set_mtime(time_t) { return ENOTIMPL; }
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virtual ErrorOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*) { return EROFS; }
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virtual ErrorOr<void> refresh_data(OpenFileDescription&) const { return {}; }
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virtual ErrorOr<NonnullRefPtr<SysFSInode>> to_inode(SysFS const&) const;
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InodeIndex component_index() const { return m_component_index; };
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virtual ~SysFSComponent() = default;
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protected:
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explicit SysFSComponent(StringView name);
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private:
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NonnullOwnPtr<KString> m_name;
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InodeIndex m_component_index {};
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};
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class SysFSDirectory : public SysFSComponent {
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public:
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virtual ErrorOr<void> traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
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virtual RefPtr<SysFSComponent> lookup(StringView name) override;
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virtual ErrorOr<NonnullRefPtr<SysFSInode>> to_inode(SysFS const& sysfs_instance) const override final;
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protected:
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explicit SysFSDirectory(StringView name);
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SysFSDirectory(StringView name, SysFSDirectory const& parent_directory);
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NonnullRefPtrVector<SysFSComponent> m_components;
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RefPtr<SysFSDirectory> m_parent_directory;
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};
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}
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