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b02ee664e7
To do this we also need to get rid of LockRefPtrs in the USB code as well. Most of the SysFS nodes are statically generated during boot and are not mutated afterwards. The same goes for general device code - once we generate the appropriate SysFS nodes, we almost never mutate the node pointers afterwards, making locking unnecessary.
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*
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* Copyright (c) 2023, 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/AtomicRefCounted.h>
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#include <AK/Error.h>
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#include <AK/Types.h>
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#include <Kernel/FileSystem/SysFS/Component.h>
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#include <Kernel/UserOrKernelBuffer.h>
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namespace Kernel {
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class SysFSSystemConstantInformation final : public SysFSComponent {
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public:
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enum class NodeName {
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LoadBase,
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CommandLine,
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SystemMode,
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};
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enum class ReadableByJailedProcesses {
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Yes,
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No,
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};
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virtual StringView name() const override;
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static NonnullRefPtr<SysFSSystemConstantInformation> must_create(SysFSDirectory const& parent_directory, NonnullOwnPtr<KBuffer> constant_data_buffer, mode_t mode, ReadableByJailedProcesses readable_by_jailed_processes, NodeName name);
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virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
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private:
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SysFSSystemConstantInformation(SysFSDirectory const& parent_directory, NonnullOwnPtr<KBuffer> constant_data_buffer, mode_t mode, ReadableByJailedProcesses readable_by_jailed_processes, NodeName name)
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: SysFSComponent(parent_directory)
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, m_constant_data_buffer(move(constant_data_buffer))
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, m_permissions(mode)
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, m_readable_by_jailed_processes(readable_by_jailed_processes)
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, m_node_name(name)
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{
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}
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virtual size_t size() const override { return m_constant_data_buffer->size(); }
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virtual mode_t permissions() const override { return m_permissions; }
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NonnullOwnPtr<KBuffer> m_constant_data_buffer;
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mode_t const m_permissions { 0644 };
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ReadableByJailedProcesses const m_readable_by_jailed_processes { ReadableByJailedProcesses::No };
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NodeName const m_node_name { NodeName::LoadBase };
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};
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}
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