mirror of
https://github.com/RGBCube/serenity
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cf45370c47
These functions used to return booleans which withheld useful error information for callers. Internally they would suppress and convert Error objects. We now log or propagate these errors up the stack.
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2021, 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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#include <Kernel/Locking/MutexProtected.h>
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namespace Kernel {
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class BlockBasedFileSystem : public FileBackedFileSystem {
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public:
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TYPEDEF_DISTINCT_ORDERED_ID(u64, BlockIndex);
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virtual ~BlockBasedFileSystem() override;
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virtual ErrorOr<void> initialize() override;
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u64 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 BlockBasedFileSystem(OpenFileDescription&);
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ErrorOr<void> read_block(BlockIndex, UserOrKernelBuffer*, size_t count, size_t offset = 0, bool allow_cache = true) const;
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ErrorOr<void> read_blocks(BlockIndex, unsigned count, UserOrKernelBuffer&, bool allow_cache = true) const;
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ErrorOr<void> raw_read(BlockIndex, UserOrKernelBuffer&);
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ErrorOr<void> raw_write(BlockIndex, const UserOrKernelBuffer&);
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ErrorOr<void> raw_read_blocks(BlockIndex index, size_t count, UserOrKernelBuffer&);
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ErrorOr<void> raw_write_blocks(BlockIndex index, size_t count, const UserOrKernelBuffer&);
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ErrorOr<void> write_block(BlockIndex, const UserOrKernelBuffer&, size_t count, size_t offset = 0, bool allow_cache = true);
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ErrorOr<void> write_blocks(BlockIndex, unsigned count, const UserOrKernelBuffer&, bool allow_cache = true);
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u64 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 MutexProtected<OwnPtr<DiskCache>> m_cache;
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};
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}
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