43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
#pragma once
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#include <denali/denali_client.h>
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#include <glacier/memory/shared_ptr.h>
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#include <glacier/status/error_or.h>
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#include <mammoth/memory_region.h>
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#include "fs/ext2/ext2.h"
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/* Simple Wrapper class around the denali client to translate blocks to sectors.
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*
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* By necessity contains the Ext Superblock (to make the translation
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* calculation).
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* */
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class Ext2BlockReader {
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public:
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static glcr::ErrorOr<glcr::SharedPtr<Ext2BlockReader>> Init(
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ScopedDenaliClient&& denali);
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// TODO: Consider creating a new class wrapper with these computations.
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Superblock* GetSuperblock();
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uint64_t BlockSize();
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uint64_t NumberOfBlockGroups();
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uint64_t BgdtBlockNum();
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uint64_t BgdtBlockSize();
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uint64_t InodeSize();
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// FIXME: This probably needs to take into account the block group number
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// because the last table will likely be smaller.
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uint64_t InodeTableBlockSize();
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glcr::ErrorOr<MappedMemoryRegion> ReadBlock(uint64_t block_number);
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glcr::ErrorOr<MappedMemoryRegion> ReadBlocks(uint64_t block_number,
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uint64_t num_blocks);
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private:
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ScopedDenaliClient denali_;
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MappedMemoryRegion super_block_region_;
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Ext2BlockReader(ScopedDenaliClient&& denali, MappedMemoryRegion super_block);
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uint64_t SectorsPerBlock();
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};
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