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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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 <Kernel/FileSystem/FileBackedFileSystem.h>
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namespace Kernel {
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class BlockBasedFS : public FileBackedFS {
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public:
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TYPEDEF_DISTINCT_ORDERED_ID(u64, BlockIndex);
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virtual ~BlockBasedFS() override;
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size_t logical_block_size() const { return m_logical_block_size; };
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virtual void flush_writes() override;
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void flush_writes_impl();
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protected:
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explicit BlockBasedFS(FileDescription&);
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KResult read_block(BlockIndex, UserOrKernelBuffer*, size_t count, size_t offset = 0, bool allow_cache = true) const;
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KResult read_blocks(BlockIndex, unsigned count, UserOrKernelBuffer&, bool allow_cache = true) const;
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bool raw_read(BlockIndex, UserOrKernelBuffer&);
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bool raw_write(BlockIndex, const UserOrKernelBuffer&);
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bool raw_read_blocks(BlockIndex index, size_t count, UserOrKernelBuffer&);
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bool raw_write_blocks(BlockIndex index, size_t count, const UserOrKernelBuffer&);
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KResult write_block(BlockIndex, const UserOrKernelBuffer&, size_t count, size_t offset = 0, bool allow_cache = true);
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KResult write_blocks(BlockIndex, unsigned count, const UserOrKernelBuffer&, bool allow_cache = true);
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size_t m_logical_block_size { 512 };
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private:
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DiskCache& cache() const;
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void flush_specific_block_if_needed(BlockIndex index);
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mutable OwnPtr<DiskCache> m_cache;
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};
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}
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template<>
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struct AK::Formatter<Kernel::BlockBasedFS::BlockIndex> : AK::Formatter<FormatString> {
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void format(FormatBuilder& builder, Kernel::BlockBasedFS::BlockIndex value)
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{
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return AK::Formatter<FormatString>::format(builder, "{}", value.value());
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}
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};
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