313 lines
8.4 KiB
Go
313 lines
8.4 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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// Package utils contains internal helper functions for go-ethereum commands.
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package utils
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import (
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"compress/gzip"
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"fmt"
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"io"
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"os"
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"os/signal"
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"runtime"
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"strings"
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"syscall"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/internal/debug"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/rlp"
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)
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const (
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importBatchSize = 2500
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)
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// Fatalf formats a message to standard error and exits the program.
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// The message is also printed to standard output if standard error
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// is redirected to a different file.
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func Fatalf(format string, args ...interface{}) {
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w := io.MultiWriter(os.Stdout, os.Stderr)
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if runtime.GOOS == "windows" {
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// The SameFile check below doesn't work on Windows.
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// stdout is unlikely to get redirected though, so just print there.
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w = os.Stdout
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} else {
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outf, _ := os.Stdout.Stat()
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errf, _ := os.Stderr.Stat()
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if outf != nil && errf != nil && os.SameFile(outf, errf) {
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w = os.Stderr
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}
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}
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fmt.Fprintf(w, "Fatal: "+format+"\n", args...)
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os.Exit(1)
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}
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func StartNode(stack *node.Node) {
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if err := stack.Start(); err != nil {
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Fatalf("Error starting protocol stack: %v", err)
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}
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go func() {
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sigc := make(chan os.Signal, 1)
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signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
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defer signal.Stop(sigc)
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<-sigc
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log.Info("Got interrupt, shutting down...")
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go stack.Stop()
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for i := 10; i > 0; i-- {
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<-sigc
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if i > 1 {
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log.Warn("Already shutting down, interrupt more to panic.", "times", i-1)
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}
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}
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debug.Exit() // ensure trace and CPU profile data is flushed.
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debug.LoudPanic("boom")
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}()
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}
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func ImportChain(chain *core.BlockChain, fn string) error {
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// Watch for Ctrl-C while the import is running.
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// If a signal is received, the import will stop at the next batch.
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interrupt := make(chan os.Signal, 1)
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stop := make(chan struct{})
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signal.Notify(interrupt, syscall.SIGINT, syscall.SIGTERM)
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defer signal.Stop(interrupt)
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defer close(interrupt)
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go func() {
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if _, ok := <-interrupt; ok {
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log.Info("Interrupted during import, stopping at next batch")
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}
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close(stop)
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}()
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checkInterrupt := func() bool {
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select {
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case <-stop:
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return true
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default:
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return false
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}
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}
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log.Info("Importing blockchain", "file", fn)
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// Open the file handle and potentially unwrap the gzip stream
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fh, err := os.Open(fn)
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if err != nil {
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return err
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}
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defer fh.Close()
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var reader io.Reader = fh
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if strings.HasSuffix(fn, ".gz") {
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if reader, err = gzip.NewReader(reader); err != nil {
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return err
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}
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}
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stream := rlp.NewStream(reader, 0)
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// Run actual the import.
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blocks := make(types.Blocks, importBatchSize)
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n := 0
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for batch := 0; ; batch++ {
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// Load a batch of RLP blocks.
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if checkInterrupt() {
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return fmt.Errorf("interrupted")
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}
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i := 0
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for ; i < importBatchSize; i++ {
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var b types.Block
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if err := stream.Decode(&b); err == io.EOF {
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break
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} else if err != nil {
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return fmt.Errorf("at block %d: %v", n, err)
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}
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// don't import first block
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if b.NumberU64() == 0 {
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i--
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continue
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}
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blocks[i] = &b
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n++
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}
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if i == 0 {
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break
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}
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// Import the batch.
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if checkInterrupt() {
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return fmt.Errorf("interrupted")
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}
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missing := missingBlocks(chain, blocks[:i])
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if len(missing) == 0 {
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log.Info("Skipping batch as all blocks present", "batch", batch, "first", blocks[0].Hash(), "last", blocks[i-1].Hash())
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continue
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}
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if _, err := chain.InsertChain(missing); err != nil {
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return fmt.Errorf("invalid block %d: %v", n, err)
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}
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}
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return nil
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}
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func missingBlocks(chain *core.BlockChain, blocks []*types.Block) []*types.Block {
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head := chain.CurrentBlock()
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for i, block := range blocks {
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// If we're behind the chain head, only check block, state is available at head
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if head.NumberU64() > block.NumberU64() {
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if !chain.HasBlock(block.Hash(), block.NumberU64()) {
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return blocks[i:]
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}
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continue
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}
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// If we're above the chain head, state availability is a must
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if !chain.HasBlockAndState(block.Hash(), block.NumberU64()) {
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return blocks[i:]
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}
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}
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return nil
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}
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// ExportChain exports a blockchain into the specified file, truncating any data
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// already present in the file.
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func ExportChain(blockchain *core.BlockChain, fn string) error {
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log.Info("Exporting blockchain", "file", fn)
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// Open the file handle and potentially wrap with a gzip stream
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fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
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if err != nil {
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return err
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}
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defer fh.Close()
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var writer io.Writer = fh
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if strings.HasSuffix(fn, ".gz") {
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writer = gzip.NewWriter(writer)
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defer writer.(*gzip.Writer).Close()
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}
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// Iterate over the blocks and export them
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if err := blockchain.Export(writer); err != nil {
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return err
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}
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log.Info("Exported blockchain", "file", fn)
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return nil
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}
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// ExportAppendChain exports a blockchain into the specified file, appending to
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// the file if data already exists in it.
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func ExportAppendChain(blockchain *core.BlockChain, fn string, first uint64, last uint64) error {
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log.Info("Exporting blockchain", "file", fn)
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// Open the file handle and potentially wrap with a gzip stream
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fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
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if err != nil {
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return err
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}
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defer fh.Close()
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var writer io.Writer = fh
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if strings.HasSuffix(fn, ".gz") {
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writer = gzip.NewWriter(writer)
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defer writer.(*gzip.Writer).Close()
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}
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// Iterate over the blocks and export them
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if err := blockchain.ExportN(writer, first, last); err != nil {
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return err
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}
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log.Info("Exported blockchain to", "file", fn)
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return nil
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}
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// ImportPreimages imports a batch of exported hash preimages into the database.
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func ImportPreimages(db *ethdb.LDBDatabase, fn string) error {
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log.Info("Importing preimages", "file", fn)
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// Open the file handle and potentially unwrap the gzip stream
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fh, err := os.Open(fn)
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if err != nil {
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return err
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}
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defer fh.Close()
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var reader io.Reader = fh
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if strings.HasSuffix(fn, ".gz") {
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if reader, err = gzip.NewReader(reader); err != nil {
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return err
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}
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}
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stream := rlp.NewStream(reader, 0)
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// Import the preimages in batches to prevent disk trashing
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preimages := make(map[common.Hash][]byte)
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for {
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// Read the next entry and ensure it's not junk
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var blob []byte
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if err := stream.Decode(&blob); err != nil {
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if err == io.EOF {
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break
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}
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return err
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}
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// Accumulate the preimages and flush when enough ws gathered
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preimages[crypto.Keccak256Hash(blob)] = common.CopyBytes(blob)
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if len(preimages) > 1024 {
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rawdb.WritePreimages(db, preimages)
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preimages = make(map[common.Hash][]byte)
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}
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}
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// Flush the last batch preimage data
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if len(preimages) > 0 {
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rawdb.WritePreimages(db, preimages)
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}
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return nil
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}
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// ExportPreimages exports all known hash preimages into the specified file,
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// truncating any data already present in the file.
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func ExportPreimages(db *ethdb.LDBDatabase, fn string) error {
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log.Info("Exporting preimages", "file", fn)
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// Open the file handle and potentially wrap with a gzip stream
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fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
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if err != nil {
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return err
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}
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defer fh.Close()
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var writer io.Writer = fh
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if strings.HasSuffix(fn, ".gz") {
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writer = gzip.NewWriter(writer)
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defer writer.(*gzip.Writer).Close()
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}
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// Iterate over the preimages and export them
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it := db.NewIteratorWithPrefix([]byte("secure-key-"))
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for it.Next() {
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if err := rlp.Encode(writer, it.Value()); err != nil {
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return err
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}
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}
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log.Info("Exported preimages", "file", fn)
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return nil
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}
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