core/rawdb, cmd, ethdb, eth: implement freezer tail deletion

cmd/geth/dbcmd.go

@@ -516,9 +516,9 @@ func freezerInspect(ctx *cli.Context) error {
 		return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
 	}
 	kind := ctx.Args().Get(0)
-	if noSnap, ok := rawdb.FreezerNoSnappy[kind]; !ok {
+	if noSnap, ok := rawdb.ChainFreezerNoSnappy[kind]; !ok {
 		var options []string
-		for opt := range rawdb.FreezerNoSnappy {
+		for opt := range rawdb.ChainFreezerNoSnappy {
 			options = append(options, opt)
 		}
 		sort.Strings(options)

core/blockchain.go

@@ -274,7 +274,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, chainConfig *par
 		rawdb.InitDatabaseFromFreezer(bc.db)
 		// If ancient database is not empty, reconstruct all missing
 		// indices in the background.
-		frozen, _ := bc.db.Ancients()
+		frozen, _ := bc.db.Ancients(rawdb.ChainFreezer)
 		if frozen > 0 {
 			txIndexBlock = frozen
 		}
@@ -313,7 +313,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, chainConfig *par
 	}
 
 	// Ensure that a previous crash in SetHead doesn't leave extra ancients
-	if frozen, err := bc.db.Ancients(); err == nil && frozen > 0 {
+	if frozen, err := bc.db.Ancients(rawdb.ChainFreezer); err == nil && frozen > 0 {
 		var (
 			needRewind bool
 			low        uint64
@@ -506,7 +506,7 @@ func (bc *BlockChain) SetHeadBeyondRoot(head uint64, root common.Hash) (uint64,
 	// Retrieve the last pivot block to short circuit rollbacks beyond it and the
 	// current freezer limit to start nuking id underflown
 	pivot := rawdb.ReadLastPivotNumber(bc.db)
-	frozen, _ := bc.db.Ancients()
+	frozen, _ := bc.db.Ancients(rawdb.ChainFreezer)
 
 	updateFn := func(db ethdb.KeyValueWriter, header *types.Header) (uint64, bool) {
 		// Rewind the block chain, ensuring we don't end up with a stateless head
@@ -590,11 +590,11 @@ func (bc *BlockChain) SetHeadBeyondRoot(head uint64, root common.Hash) (uint64,
 	// Rewind the header chain, deleting all block bodies until then
 	delFn := func(db ethdb.KeyValueWriter, hash common.Hash, num uint64) {
 		// Ignore the error here since light client won't hit this path
-		frozen, _ := bc.db.Ancients()
+		frozen, _ := bc.db.Ancients(rawdb.ChainFreezer)
 		if num+1 <= frozen {
 			// Truncate all relative data(header, total difficulty, body, receipt
 			// and canonical hash) from ancient store.
-			if err := bc.db.TruncateAncients(num); err != nil {
+			if err := bc.db.TruncateHead(rawdb.ChainFreezer, num); err != nil {
 				log.Crit("Failed to truncate ancient data", "number", num, "err", err)
 			}
 			// Remove the hash <-> number mapping from the active store.
@@ -949,7 +949,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 
 		// Ensure genesis is in ancients.
 		if first.NumberU64() == 1 {
-			if frozen, _ := bc.db.Ancients(); frozen == 0 {
+			if frozen, _ := bc.db.Ancients(rawdb.ChainFreezer); frozen == 0 {
 				b := bc.genesisBlock
 				td := bc.genesisBlock.Difficulty()
 				writeSize, err := rawdb.WriteAncientBlocks(bc.db, []*types.Block{b}, []types.Receipts{nil}, td)
@@ -1004,14 +1004,14 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 			// The tx index data could not be written.
 			// Roll back the ancient store update.
 			fastBlock := bc.CurrentFastBlock().NumberU64()
-			if err := bc.db.TruncateAncients(fastBlock + 1); err != nil {
+			if err := bc.db.TruncateHead(rawdb.ChainFreezer, fastBlock+1); err != nil {
 				log.Error("Can't truncate ancient store after failed insert", "err", err)
 			}
 			return 0, err
 		}
 
 		// Sync the ancient store explicitly to ensure all data has been flushed to disk.
-		if err := bc.db.Sync(); err != nil {
+		if err := bc.db.Sync(rawdb.ChainFreezer); err != nil {
 			return 0, err
 		}
 
@@ -1020,7 +1020,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 		if !updateHead(blockChain[len(blockChain)-1]) {
 			// We end up here if the header chain has reorg'ed, and the blocks/receipts
 			// don't match the canonical chain.
-			if err := bc.db.TruncateAncients(previousFastBlock + 1); err != nil {
+			if err := bc.db.TruncateHead(rawdb.ChainFreezer, previousFastBlock+1); err != nil {
 				log.Error("Can't truncate ancient store after failed insert", "err", err)
 			}
 			return 0, errSideChainReceipts

core/rawdb/accessors_chain.go

@@ -36,7 +36,7 @@ import (
 // ReadCanonicalHash retrieves the hash assigned to a canonical block number.
 func ReadCanonicalHash(db ethdb.Reader, number uint64) common.Hash {
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		data, _ = reader.Ancient(freezerHashTable, number)
 		if len(data) == 0 {
 			// Get it by hash from leveldb
@@ -83,8 +83,8 @@ type NumberHash struct {
 	Hash   common.Hash
 }
 
-// ReadAllHashes retrieves all the hashes assigned to blocks at a certain heights,
-// both canonical and reorged forks included.
+// ReadAllHashesInRange retrieves all the hashes assigned to blocks at a certain
+// heights, both canonical and reorged forks included.
 // This method considers both limits to be _inclusive_.
 func ReadAllHashesInRange(db ethdb.Iteratee, first, last uint64) []*NumberHash {
 	var (
@@ -300,7 +300,7 @@ func WriteFastTxLookupLimit(db ethdb.KeyValueWriter, number uint64) {
 // ReadHeaderRLP retrieves a block header in its raw RLP database encoding.
 func ReadHeaderRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue {
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		// First try to look up the data in ancient database. Extra hash
 		// comparison is necessary since ancient database only maintains
 		// the canonical data.
@@ -377,25 +377,35 @@ func deleteHeaderWithoutNumber(db ethdb.KeyValueWriter, hash common.Hash, number
 	}
 }
 
-// isCanon is an internal utility method, to check whether the given number/hash
+// isCanonOp is an internal utility method, to check whether the given number/hash
 // is part of the ancient (canon) set.
-func isCanon(reader ethdb.AncientReader, number uint64, hash common.Hash) bool {
+func isCanonOp(reader ethdb.AncientReadOp, number uint64, hash common.Hash) bool {
 	h, err := reader.Ancient(freezerHashTable, number)
 	if err != nil {
 		return false
 	}
 	return bytes.Equal(h, hash[:])
 }
 
+// isCanonOp is an internal utility method, to check whether the given number/hash
+// is part of the ancient (canon) set.
+func isCanon(reader ethdb.AncientReader, number uint64, hash common.Hash) bool {
+	h, err := reader.Ancient(ChainFreezer, freezerHashTable, number)
+	if err != nil {
+		return false
+	}
+	return bytes.Equal(h, hash[:])
+}
+
 // ReadBodyRLP retrieves the block body (transactions and uncles) in RLP encoding.
 func ReadBodyRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue {
 	// First try to look up the data in ancient database. Extra hash
 	// comparison is necessary since ancient database only maintains
 	// the canonical data.
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		// Check if the data is in ancients
-		if isCanon(reader, number, hash) {
+		if isCanonOp(reader, number, hash) {
 			data, _ = reader.Ancient(freezerBodiesTable, number)
 			return nil
 		}
@@ -410,7 +420,7 @@ func ReadBodyRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue
 // block at number, in RLP encoding.
 func ReadCanonicalBodyRLP(db ethdb.Reader, number uint64) rlp.RawValue {
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		data, _ = reader.Ancient(freezerBodiesTable, number)
 		if len(data) > 0 {
 			return nil
@@ -473,9 +483,9 @@ func DeleteBody(db ethdb.KeyValueWriter, hash common.Hash, number uint64) {
 // ReadTdRLP retrieves a block's total difficulty corresponding to the hash in RLP encoding.
 func ReadTdRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue {
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		// Check if the data is in ancients
-		if isCanon(reader, number, hash) {
+		if isCanonOp(reader, number, hash) {
 			data, _ = reader.Ancient(freezerDifficultyTable, number)
 			return nil
 		}
@@ -533,9 +543,9 @@ func HasReceipts(db ethdb.Reader, hash common.Hash, number uint64) bool {
 // ReadReceiptsRLP retrieves all the transaction receipts belonging to a block in RLP encoding.
 func ReadReceiptsRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue {
 	var data []byte
-	db.ReadAncients(func(reader ethdb.AncientReader) error {
+	db.ReadAncients(ChainFreezer, func(reader ethdb.AncientReadOp) error {
 		// Check if the data is in ancients
-		if isCanon(reader, number, hash) {
+		if isCanonOp(reader, number, hash) {
 			data, _ = reader.Ancient(freezerReceiptTable, number)
 			return nil
 		}
@@ -741,13 +751,13 @@ func WriteBlock(db ethdb.KeyValueWriter, block *types.Block) {
 	WriteHeader(db, block.Header())
 }
 
-// WriteAncientBlock writes entire block data into ancient store and returns the total written size.
+// WriteAncientBlocks writes entire block data into ancient store and returns the total written size.
 func WriteAncientBlocks(db ethdb.AncientWriter, blocks []*types.Block, receipts []types.Receipts, td *big.Int) (int64, error) {
 	var (
 		tdSum      = new(big.Int).Set(td)
 		stReceipts []*types.ReceiptForStorage
 	)
-	return db.ModifyAncients(func(op ethdb.AncientWriteOp) error {
+	return db.ModifyAncients(ChainFreezer, func(op ethdb.AncientWriteOp) error {
 		for i, block := range blocks {
 			// Convert receipts to storage format and sum up total difficulty.
 			stReceipts = stReceipts[:0]

core/rawdb/chain_iterator.go

@@ -34,7 +34,7 @@ import (
 // injects into the database the block hash->number mappings.
 func InitDatabaseFromFreezer(db ethdb.Database) {
 	// If we can't access the freezer or it's empty, abort
-	frozen, err := db.Ancients()
+	frozen, err := db.Ancients(ChainFreezer)
 	if err != nil || frozen == 0 {
 		return
 	}
@@ -49,7 +49,7 @@ func InitDatabaseFromFreezer(db ethdb.Database) {
 		// it would be 'neat' to read more data in one go, and let the
 		// freezerdb return N items (e.g up to 1000 items per go)
 		// That would require an API change in Ancients though
-		if h, err := db.Ancient(freezerHashTable, i); err != nil {
+		if h, err := db.Ancient(ChainFreezer, freezerHashTable, i); err != nil {
 			log.Crit("Failed to init database from freezer", "err", err)
 		} else {
 			hash = common.BytesToHash(h)