Maintains a tree of blocks (stored in m_block_index) which is consulted to determine where the most-work tip is. More...

#include <blockstorage.h>

Collaboration diagram for BlockManager:

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Public Member Functions
BlockMap m_block_index	GUARDED_BY (cs_main)

std::unique_ptr< CBlockTreeDB > m_block_tree_db	GUARDED_BY (::cs_main)

void	Unload () EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Clear all data members. More...

CBlockIndex *	AddToBlockIndex (const CBlockHeader &block) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

CBlockIndex *	InsertBlockIndex (const uint256 &hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Create a new block index entry for a given block hash. More...

void	PruneOneBlockFile (const int fileNumber) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Mark one block file as pruned (modify associated database entries) More...

CBlockIndex *	LookupBlockIndex (const uint256 &hash) const EXCLUSIVE_LOCKS_REQUIRED(cs_main)

CBlockFileInfo *	GetBlockFileInfo (size_t n)
	Get block file info entry for one block file. More...

bool	WriteUndoDataForBlock (const CBlockUndo &blockundo, BlockValidationState &state, CBlockIndex *pindex, const CChainParams &chainparams)

FlatFilePos	SaveBlockToDisk (const CBlock &block, int nHeight, CChain &active_chain, const CChainParams &chainparams, const FlatFilePos *dbp)
	Store block on disk. More...

uint64_t	CalculateCurrentUsage ()
	Calculate the amount of disk space the block & undo files currently use. More...

CBlockIndex *	GetLastCheckpoint (const CCheckpointData &data) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Returns last CBlockIndex* that is a checkpoint. More...

	~BlockManager ()

Public Attributes
std::multimap< CBlockIndex , CBlockIndex >	m_blocks_unlinked
	All pairs A->B, where A (or one of its ancestors) misses transactions, but B has transactions. More...

bool WriteBlockIndexDB() EXCLUSIVE_LOCKS_REQUIRED(bool LoadBlockIndexDB(ChainstateManager &chainman) EXCLUSIVE_LOCKS_REQUIRED(bool	LoadBlockIndex (const Consensus::Params &consensus_params, ChainstateManager &chainman) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Load the blocktree off disk and into memory. More...

Private Member Functions
void	FlushBlockFile (bool fFinalize=false, bool finalize_undo=false)

void	FlushUndoFile (int block_file, bool finalize=false)

bool	FindBlockPos (FlatFilePos &pos, unsigned int nAddSize, unsigned int nHeight, CChain &active_chain, uint64_t nTime, bool fKnown)

bool	FindUndoPos (BlockValidationState &state, int nFile, FlatFilePos &pos, unsigned int nAddSize)

void	FindFilesToPruneManual (std::set< int > &setFilesToPrune, int nManualPruneHeight, int chain_tip_height)

void	FindFilesToPrune (std::set< int > &setFilesToPrune, uint64_t nPruneAfterHeight, int chain_tip_height, int prune_height, bool is_ibd)
	Prune block and undo files (blk???.dat and rev???.dat) so that the disk space used is less than a user-defined target. More...

Private Attributes
friend	CChainState

friend	ChainstateManager

RecursiveMutex	cs_LastBlockFile

std::vector< CBlockFileInfo >	m_blockfile_info

int	m_last_blockfile = 0

bool	m_check_for_pruning = false
	Global flag to indicate we should check to see if there are block/undo files that should be deleted. More...

std::set< CBlockIndex * >	m_dirty_blockindex
	Dirty block index entries. More...

std::set< int >	m_dirty_fileinfo
	Dirty block file entries. More...

Detailed Description

Maintains a tree of blocks (stored in m_block_index) which is consulted to determine where the most-work tip is.

This data is used mostly in CChainState - information about, e.g., candidate tips is not maintained here.

Definition at line 64 of file blockstorage.h.

Constructor & Destructor Documentation

◆ ~BlockManager()

BlockManager::~BlockManager ( )

inline

Definition at line 158 of file blockstorage.h.

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Member Function Documentation

◆ AddToBlockIndex()

CBlockIndex * BlockManager::AddToBlockIndex ( const CBlockHeader & block )

Definition at line 41 of file blockstorage.cpp.

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◆ CalculateCurrentUsage()

uint64_t BlockManager::CalculateCurrentUsage ( )

Calculate the amount of disk space the block & undo files currently use.

Definition at line 570 of file blockstorage.cpp.

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◆ FindBlockPos()

bool BlockManager::FindBlockPos	(	FlatFilePos &	pos,
		unsigned int	nAddSize,
		unsigned int	nHeight,
		CChain &	active_chain,
		uint64_t	nTime,
		bool	fKnown
	)

private

Definition at line 617 of file blockstorage.cpp.

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◆ FindFilesToPrune()

void BlockManager::FindFilesToPrune	(	std::set< int > &	setFilesToPrune,
		uint64_t	nPruneAfterHeight,
		int	chain_tip_height,
		int	prune_height,
		bool	is_ibd
	)

private

Prune block and undo files (blk???.dat and rev???.dat) so that the disk space used is less than a user-defined target.

The user sets the target (in MB) on the command line or in config file. This will be run on startup and whenever new space is allocated in a block or undo file, staying below the target. Changing back to unpruned requires a reindex (which in this case means the blockchain must be re-downloaded.)

Pruning functions are called from FlushStateToDisk when the m_check_for_pruning flag has been set. Block and undo files are deleted in lock-step (when blk00003.dat is deleted, so is rev00003.dat.) Pruning cannot take place until the longest chain is at least a certain length (CChainParams::nPruneAfterHeight). Pruning will never delete a block within a defined distance (currently 288) from the active chain's tip. The block index is updated by unsetting HAVE_DATA and HAVE_UNDO for any blocks that were stored in the deleted files. A db flag records the fact that at least some block files have been pruned.

Parameters

[out] setFilesToPrune The set of file indices that can be unlinked will be returned

Definition at line 134 of file blockstorage.cpp.

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◆ FindFilesToPruneManual()

void BlockManager::FindFilesToPruneManual	(	std::set< int > &	setFilesToPrune,
		int	nManualPruneHeight,
		int	chain_tip_height
	)

private

Definition at line 111 of file blockstorage.cpp.

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◆ FindUndoPos()

bool BlockManager::FindUndoPos	(	BlockValidationState &	state,
		int	nFile,
		FlatFilePos &	pos,
		unsigned int	nAddSize
	)

private

Definition at line 672 of file blockstorage.cpp.

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◆ FlushBlockFile()

void BlockManager::FlushBlockFile	(	bool	fFinalize = `false`,
		bool	finalize_undo = `false`
	)

private

Definition at line 558 of file blockstorage.cpp.

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◆ FlushUndoFile()

void BlockManager::FlushUndoFile	(	int	block_file,
		bool	finalize = `false`
	)

private

Definition at line 550 of file blockstorage.cpp.

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◆ GetBlockFileInfo()

CBlockFileInfo * BlockManager::GetBlockFileInfo ( size_t n )

Get block file info entry for one block file.

Definition at line 482 of file blockstorage.cpp.

◆ GetLastCheckpoint()

CBlockIndex * BlockManager::GetLastCheckpoint ( const CCheckpointData & data )

Returns last CBlockIndex* that is a checkpoint.

Definition at line 415 of file blockstorage.cpp.

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◆ GUARDED_BY() [1/2]

std::unique_ptr<CBlockTreeDB> m_block_tree_db BlockManager::GUARDED_BY ( ::cs_main )

◆ GUARDED_BY() [2/2]

BlockMap m_block_index BlockManager::GUARDED_BY ( cs_main )

◆ InsertBlockIndex()

CBlockIndex * BlockManager::InsertBlockIndex ( const uint256 & hash )

Create a new block index entry for a given block hash.

Definition at line 193 of file blockstorage.cpp.

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◆ LookupBlockIndex()

CBlockIndex * BlockManager::LookupBlockIndex ( const uint256 & hash ) const

Definition at line 34 of file blockstorage.cpp.

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◆ PruneOneBlockFile()

void BlockManager::PruneOneBlockFile ( const int fileNumber )

Mark one block file as pruned (modify associated database entries)

Definition at line 77 of file blockstorage.cpp.

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◆ SaveBlockToDisk()

FlatFilePos BlockManager::SaveBlockToDisk	(	const CBlock &	block,
		int	nHeight,
		CChain &	active_chain,
		const CChainParams &	chainparams,
		const FlatFilePos *	dbp
	)

Store block on disk.

If dbp is non-nullptr, the file is known to already reside on disk

Definition at line 837 of file blockstorage.cpp.

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◆ Unload()

void BlockManager::Unload ( )

Clear all data members.

Definition at line 325 of file blockstorage.cpp.

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◆ WriteUndoDataForBlock()

bool BlockManager::WriteUndoDataForBlock	(	const CBlockUndo &	blockundo,
		BlockValidationState &	state,
		CBlockIndex *	pindex,
		const CChainParams &	chainparams
	)

Definition at line 717 of file blockstorage.cpp.

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Member Data Documentation

◆ CChainState

friend BlockManager::CChainState

private

Definition at line 66 of file blockstorage.h.

◆ ChainstateManager

friend BlockManager::ChainstateManager

private

Definition at line 67 of file blockstorage.h.

◆ cs_LastBlockFile

RecursiveMutex BlockManager::cs_LastBlockFile

private

Definition at line 95 of file blockstorage.h.

◆ LoadBlockIndex

bool BlockManager::LoadBlockIndex

Load the blocktree off disk and into memory.

Populate certain metadata per index entry (nStatus, nChainWork, nTimeMax, etc.) as well as peripheral collections like m_dirty_blockindex.

Definition at line 129 of file blockstorage.h.

◆ m_blockfile_info

std::vector<CBlockFileInfo> BlockManager::m_blockfile_info

private

Definition at line 96 of file blockstorage.h.

◆ m_blocks_unlinked

std::multimap<CBlockIndex*, CBlockIndex*> BlockManager::m_blocks_unlinked

All pairs A->B, where A (or one of its ancestors) misses transactions, but B has transactions.

Pruned nodes may have entries where B is missing data.

Definition at line 117 of file blockstorage.h.

◆ m_check_for_pruning

bool BlockManager::m_check_for_pruning = false

private

Global flag to indicate we should check to see if there are block/undo files that should be deleted.

Set on startup or if we allocate more file space when we're in prune mode

Definition at line 102 of file blockstorage.h.

◆ m_dirty_blockindex

std::set<CBlockIndex*> BlockManager::m_dirty_blockindex

private

Dirty block index entries.

Definition at line 105 of file blockstorage.h.

◆ m_dirty_fileinfo

std::set<int> BlockManager::m_dirty_fileinfo

private

Dirty block file entries.

Definition at line 108 of file blockstorage.h.

◆ m_last_blockfile

int BlockManager::m_last_blockfile = 0

private

Definition at line 97 of file blockstorage.h.

The documentation for this class was generated from the following files:

src/node/blockstorage.h
src/node/blockstorage.cpp

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ~BlockManager()

Member Function Documentation

◆ AddToBlockIndex()

◆ CalculateCurrentUsage()

◆ FindBlockPos()

◆ FindFilesToPrune()

◆ FindFilesToPruneManual()

◆ FindUndoPos()

◆ FlushBlockFile()

◆ FlushUndoFile()

◆ GetBlockFileInfo()

◆ GetLastCheckpoint()

◆ GUARDED_BY() [1/2]

◆ GUARDED_BY() [2/2]

◆ InsertBlockIndex()

◆ LookupBlockIndex()

◆ PruneOneBlockFile()

◆ SaveBlockToDisk()

◆ Unload()

◆ WriteUndoDataForBlock()

Member Data Documentation

◆ CChainState

◆ ChainstateManager

◆ cs_LastBlockFile

◆ LoadBlockIndex

◆ m_blockfile_info

◆ m_blocks_unlinked

◆ m_check_for_pruning

◆ m_dirty_blockindex

◆ m_dirty_fileinfo

◆ m_last_blockfile