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cmd/geth, core/rawdb: seamless freezer consistency, friendly removedb

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This commit is contained in:
Péter Szilágyi
2019-05-16 14:30:11 +03:00
parent 536b3b416c
commit 9eba3a9fff
10 changed files with 122 additions and 313 deletions
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234
cmd/geth/chaincmd.go
View File

@ -18,10 +18,7 @@ package main
import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"runtime"
@ -171,21 +168,6 @@ Remove blockchain and state databases`,
The arguments are interpreted as block numbers or hashes.
Use "ethereum dump 0" to dump the genesis block.`,
}
migrateAncientCommand = cli.Command{
Action: utils.MigrateFlags(migrateAncient),
Name: "migrate-ancient",
Usage: "migrate ancient database forcibly",
ArgsUsage: " ",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.AncientFlag,
utils.CacheFlag,
utils.TestnetFlag,
utils.RinkebyFlag,
utils.GoerliFlag,
},
Category: "BLOCKCHAIN COMMANDS",
}
inspectCommand = cli.Command{
Action: utils.MigrateFlags(inspect),
Name: "inspect",
@ -460,51 +442,63 @@ func copyDb(ctx *cli.Context) error {
func removeDB(ctx *cli.Context) error {
stack, config := makeConfigNode(ctx)
for i, name := range []string{"chaindata", "lightchaindata"} {
// Ensure the database exists in the first place
logger := log.New("database", name)
var (
dbdirs []string
freezer string
)
dbdir := stack.ResolvePath(name)
if !common.FileExist(dbdir) {
logger.Info("Database doesn't exist, skipping", "path", dbdir)
continue
}
dbdirs = append(dbdirs, dbdir)
if i == 0 {
freezer = config.Eth.DatabaseFreezer
switch {
case freezer == "":
freezer = filepath.Join(dbdir, "ancient")
case !filepath.IsAbs(freezer):
freezer = config.Node.ResolvePath(freezer)
}
if common.FileExist(freezer) {
dbdirs = append(dbdirs, freezer)
}
}
for i := len(dbdirs) - 1; i >= 0; i-- {
// Confirm removal and execute
fmt.Println(dbdirs[i])
confirm, err := console.Stdin.PromptConfirm("Remove this database?")
switch {
case err != nil:
utils.Fatalf("%v", err)
case !confirm:
logger.Warn("Database deletion aborted")
default:
start := time.Now()
os.RemoveAll(dbdirs[i])
logger.Info("Database successfully deleted", "elapsed", common.PrettyDuration(time.Since(start)))
}
}
// Remove the full node state database
path := stack.ResolvePath("chaindata")
if common.FileExist(path) {
confirmAndRemoveDB(path, "full node state database")
} else {
log.Info("Full node state database missing", "path", path)
}
// Remove the full node ancient database
path = config.Eth.DatabaseFreezer
switch {
case path == "":
path = filepath.Join(stack.ResolvePath("chaindata"), "ancient")
case !filepath.IsAbs(path):
path = config.Node.ResolvePath(path)
}
if common.FileExist(path) {
confirmAndRemoveDB(path, "full node ancient database")
} else {
log.Info("Full node ancient database missing", "path", path)
}
// Remove the light node database
path = stack.ResolvePath("lightchaindata")
if common.FileExist(path) {
confirmAndRemoveDB(path, "light node database")
} else {
log.Info("Light node database missing", "path", path)
}
return nil
}
// confirmAndRemoveDB prompts the user for a last confirmation and removes the
// folder if accepted.
func confirmAndRemoveDB(database string, kind string) {
confirm, err := console.Stdin.PromptConfirm(fmt.Sprintf("Remove %s (%s)?", kind, database))
switch {
case err != nil:
utils.Fatalf("%v", err)
case !confirm:
log.Info("Database deletion skipped", "path", database)
default:
start := time.Now()
filepath.Walk(database, func(path string, info os.FileInfo, err error) error {
// If we're at the top level folder, recurse into
if path == database {
return nil
}
// Delete all the files, but not subfolders
if !info.IsDir() {
os.Remove(path)
return nil
}
return filepath.SkipDir
})
log.Info("Database successfully deleted", "path", database, "elapsed", common.PrettyDuration(time.Since(start)))
}
}
func dump(ctx *cli.Context) error {
stack := makeFullNode(ctx)
defer stack.Close()
@ -533,47 +527,6 @@ func dump(ctx *cli.Context) error {
return nil
}
func migrateAncient(ctx *cli.Context) error {
node, config := makeConfigNode(ctx)
defer node.Close()
dbdir := config.Node.ResolvePath("chaindata")
kvdb, err := rawdb.NewLevelDBDatabase(dbdir, 128, 1024, "")
if err != nil {
return err
}
defer kvdb.Close()
freezer := config.Eth.DatabaseFreezer
switch {
case freezer == "":
freezer = filepath.Join(dbdir, "ancient")
case !filepath.IsAbs(freezer):
freezer = config.Node.ResolvePath(freezer)
}
stored := rawdb.ReadAncientPath(kvdb)
if stored != freezer && stored != "" {
confirm, err := console.Stdin.PromptConfirm(fmt.Sprintf("Are you sure to migrate ancient database from %s to %s?", stored, freezer))
switch {
case err != nil:
utils.Fatalf("%v", err)
case !confirm:
log.Warn("Ancient database migration aborted")
default:
if err := rename(stored, freezer); err != nil {
// Renaming a file can fail if the source and destination
// are on different file systems.
if err := moveAncient(stored, freezer); err != nil {
utils.Fatalf("Migrate ancient database failed, %v", err)
}
}
rawdb.WriteAncientPath(kvdb, freezer)
log.Info("Ancient database successfully migrated")
}
}
return nil
}
func inspect(ctx *cli.Context) error {
node, _ := makeConfigNode(ctx)
defer node.Close()
@ -589,84 +542,3 @@ func hashish(x string) bool {
_, err := strconv.Atoi(x)
return err != nil
}
// copyFileSynced copies data from source file to destination
// and synces the dest file forcibly.
func copyFileSynced(src string, dest string, info os.FileInfo) error {
srcf, err := os.Open(src)
if err != nil {
return err
}
defer srcf.Close()
destf, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, info.Mode().Perm())
if err != nil {
return err
}
// The maximum size of ancient file is 2GB, 4MB buffer is suitable here.
buff := make([]byte, 4*1024*1024)
for {
rn, err := srcf.Read(buff)
if err != nil && err != io.EOF {
return err
}
if rn == 0 {
break
}
if wn, err := destf.Write(buff[:rn]); err != nil || wn != rn {
return err
}
}
if err1 := destf.Sync(); err == nil {
err = err1
}
if err1 := destf.Close(); err == nil {
err = err1
}
return err
}
// copyDirSynced recursively copies files under the specified dir
// to dest and synces the dest dir forcibly.
func copyDirSynced(src string, dest string, info os.FileInfo) error {
if err := os.MkdirAll(dest, os.ModePerm); err != nil {
return err
}
defer os.Chmod(dest, info.Mode())
objects, err := ioutil.ReadDir(src)
if err != nil {
return err
}
for _, obj := range objects {
// All files in ancient database should be flatten files.
if !obj.Mode().IsRegular() {
continue
}
subsrc, subdest := filepath.Join(src, obj.Name()), filepath.Join(dest, obj.Name())
if err := copyFileSynced(subsrc, subdest, obj); err != nil {
return err
}
}
return syncDir(dest)
}
// moveAncient migrates ancient database from source to destination.
func moveAncient(src string, dest string) error {
srcinfo, err := os.Stat(src)
if err != nil {
return err
}
if !srcinfo.IsDir() {
return errors.New("ancient directory expected")
}
if destinfo, err := os.Lstat(dest); !os.IsNotExist(err) {
if destinfo.Mode()&os.ModeSymlink != 0 {
return errors.New("symbolic link datadir is not supported")
}
}
if err := copyDirSynced(src, dest, srcinfo); err != nil {
return err
}
return os.RemoveAll(src)
}

1
cmd/geth/main.go
View File

@ -204,7 +204,6 @@ func init() {
copydbCommand,
removedbCommand,
dumpCommand,
migrateAncientCommand,
inspectCommand,
// See accountcmd.go:
accountCommand,

51
cmd/geth/os_unix.go
View File

@ -1,51 +0,0 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license.
//
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package main
import (
"os"
"syscall"
)
func rename(oldpath, newpath string) error {
return os.Rename(oldpath, newpath)
}
func isErrInvalid(err error) bool {
if err == os.ErrInvalid {
return true
}
// Go < 1.8
if syserr, ok := err.(*os.SyscallError); ok && syserr.Err == syscall.EINVAL {
return true
}
// Go >= 1.8 returns *os.PathError instead
if patherr, ok := err.(*os.PathError); ok && patherr.Err == syscall.EINVAL {
return true
}
return false
}
func syncDir(name string) error {
// As per fsync manpage, Linux seems to expect fsync on directory, however
// some system don't support this, so we will ignore syscall.EINVAL.
//
// From fsync(2):
// Calling fsync() does not necessarily ensure that the entry in the
// directory containing the file has also reached disk. For that an
// explicit fsync() on a file descriptor for the directory is also needed.
f, err := os.Open(name)
if err != nil {
return err
}
defer f.Close()
if err := f.Sync(); err != nil && !isErrInvalid(err) {
return err
}
return nil
}

43
cmd/geth/os_windows.go
View File

@ -1,43 +0,0 @@
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license.
package main
import (
"syscall"
"unsafe"
)
var (
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
procMoveFileExW = modkernel32.NewProc("MoveFileExW")
)
const _MOVEFILE_REPLACE_EXISTING = 1
func moveFileEx(from *uint16, to *uint16, flags uint32) error {
r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
if r1 == 0 {
if e1 != 0 {
return error(e1)
}
return syscall.EINVAL
}
return nil
}
func rename(oldpath, newpath string) error {
from, err := syscall.UTF16PtrFromString(oldpath)
if err != nil {
return err
}
to, err := syscall.UTF16PtrFromString(newpath)
if err != nil {
return err
}
return moveFileEx(from, to, _MOVEFILE_REPLACE_EXISTING)
}
func syncDir(name string) error { return nil }