Official Go implementation of the Ethereum protocol
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go-ethereum/core/rawdb/ancient_utils.go

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4.2 KiB

// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rawdb
import (
"fmt"
"path/filepath"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
)
type tableSize struct {
name string
size common.StorageSize
}
// freezerInfo contains the basic information of the freezer.
type freezerInfo struct {
name string // The identifier of freezer
head uint64 // The number of last stored item in the freezer
tail uint64 // The number of first stored item in the freezer
sizes []tableSize // The storage size per table
}
// count returns the number of stored items in the freezer.
func (info *freezerInfo) count() uint64 {
return info.head - info.tail + 1
}
// size returns the storage size of the entire freezer.
func (info *freezerInfo) size() common.StorageSize {
var total common.StorageSize
for _, table := range info.sizes {
total += table.size
}
return total
}
func inspect(name string, order map[string]bool, reader ethdb.AncientReader) (freezerInfo, error) {
info := freezerInfo{name: name}
for t := range order {
size, err := reader.AncientSize(t)
if err != nil {
return freezerInfo{}, err
}
info.sizes = append(info.sizes, tableSize{name: t, size: common.StorageSize(size)})
}
// Retrieve the number of last stored item
ancients, err := reader.Ancients()
if err != nil {
return freezerInfo{}, err
}
info.head = ancients - 1
// Retrieve the number of first stored item
tail, err := reader.Tail()
if err != nil {
return freezerInfo{}, err
}
info.tail = tail
return info, nil
}
// inspectFreezers inspects all freezers registered in the system.
func inspectFreezers(db ethdb.Database) ([]freezerInfo, error) {
var infos []freezerInfo
for _, freezer := range freezers {
switch freezer {
case ChainFreezerName:
info, err := inspect(ChainFreezerName, chainFreezerNoSnappy, db)
if err != nil {
return nil, err
}
infos = append(infos, info)
case StateFreezerName:
datadir, err := db.AncientDatadir()
if err != nil {
return nil, err
}
f, err := NewStateFreezer(datadir, true)
if err != nil {
continue // might be possible the state freezer is not existent
}
defer f.Close()
info, err := inspect(freezer, stateFreezerNoSnappy, f)
if err != nil {
return nil, err
}
infos = append(infos, info)
default:
return nil, fmt.Errorf("unknown freezer, supported ones: %v", freezers)
}
}
return infos, nil
}
// InspectFreezerTable dumps out the index of a specific freezer table. The passed
// ancient indicates the path of root ancient directory where the chain freezer can
// be opened. Start and end specify the range for dumping out indexes.
// Note this function can only be used for debugging purposes.
func InspectFreezerTable(ancient string, freezerName string, tableName string, start, end int64) error {
var (
path string
tables map[string]bool
)
switch freezerName {
case ChainFreezerName:
path, tables = resolveChainFreezerDir(ancient), chainFreezerNoSnappy
case StateFreezerName:
path, tables = filepath.Join(ancient, freezerName), stateFreezerNoSnappy
default:
return fmt.Errorf("unknown freezer, supported ones: %v", freezers)
}
noSnappy, exist := tables[tableName]
if !exist {
var names []string
for name := range tables {
names = append(names, name)
}
return fmt.Errorf("unknown table, supported ones: %v", names)
}
table, err := newFreezerTable(path, tableName, noSnappy, true)
if err != nil {
return err
}
table.dumpIndexStdout(start, end)
return nil
}