mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-09 14:50:56 +00:00
115 lines
2.6 KiB
Go
115 lines
2.6 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
package db
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
"github.com/syndtr/goleveldb/leveldb"
|
|
)
|
|
|
|
// convertKeyFormat converts from the v0.12 to the v0.13 database format, to
|
|
// avoid having to do rescan. The change is in the key format for folder
|
|
// labels, so we basically just iterate over the database rewriting keys as
|
|
// necessary.
|
|
func convertKeyFormat(from, to *leveldb.DB) error {
|
|
l.Infoln("Converting database key format")
|
|
blocks, files, globals, unchanged := 0, 0, 0, 0
|
|
|
|
dbi := newDBInstance(to)
|
|
i := from.NewIterator(nil, nil)
|
|
for i.Next() {
|
|
key := i.Key()
|
|
switch key[0] {
|
|
case KeyTypeBlock:
|
|
folder, file := oldFromBlockKey(key)
|
|
folderIdx := dbi.folderIdx.ID([]byte(folder))
|
|
hash := key[1+64:]
|
|
newKey := blockKeyInto(nil, hash, folderIdx, file)
|
|
if err := to.Put(newKey, i.Value(), nil); err != nil {
|
|
return err
|
|
}
|
|
blocks++
|
|
|
|
case KeyTypeDevice:
|
|
newKey := dbi.deviceKey(oldDeviceKeyFolder(key), oldDeviceKeyDevice(key), oldDeviceKeyName(key))
|
|
if err := to.Put(newKey, i.Value(), nil); err != nil {
|
|
return err
|
|
}
|
|
files++
|
|
|
|
case KeyTypeGlobal:
|
|
newKey := dbi.globalKey(oldGlobalKeyFolder(key), oldGlobalKeyName(key))
|
|
if err := to.Put(newKey, i.Value(), nil); err != nil {
|
|
return err
|
|
}
|
|
globals++
|
|
|
|
case KeyTypeVirtualMtime:
|
|
// Cannot be converted, we drop it instead :(
|
|
|
|
default:
|
|
if err := to.Put(key, i.Value(), nil); err != nil {
|
|
return err
|
|
}
|
|
unchanged++
|
|
}
|
|
}
|
|
|
|
l.Infof("Converted %d blocks, %d files, %d globals (%d unchanged).", blocks, files, globals, unchanged)
|
|
|
|
return nil
|
|
}
|
|
|
|
func oldDeviceKeyFolder(key []byte) []byte {
|
|
folder := key[1 : 1+64]
|
|
izero := bytes.IndexByte(folder, 0)
|
|
if izero < 0 {
|
|
return folder
|
|
}
|
|
return folder[:izero]
|
|
}
|
|
|
|
func oldDeviceKeyDevice(key []byte) []byte {
|
|
return key[1+64 : 1+64+32]
|
|
}
|
|
|
|
func oldDeviceKeyName(key []byte) []byte {
|
|
return key[1+64+32:]
|
|
}
|
|
|
|
func oldGlobalKeyName(key []byte) []byte {
|
|
return key[1+64:]
|
|
}
|
|
|
|
func oldGlobalKeyFolder(key []byte) []byte {
|
|
folder := key[1 : 1+64]
|
|
izero := bytes.IndexByte(folder, 0)
|
|
if izero < 0 {
|
|
return folder
|
|
}
|
|
return folder[:izero]
|
|
}
|
|
|
|
func oldFromBlockKey(data []byte) (string, string) {
|
|
if len(data) < 1+64+32+1 {
|
|
panic("Incorrect key length")
|
|
}
|
|
if data[0] != KeyTypeBlock {
|
|
panic("Incorrect key type")
|
|
}
|
|
|
|
file := string(data[1+64+32:])
|
|
|
|
slice := data[1 : 1+64]
|
|
izero := bytes.IndexByte(slice, 0)
|
|
if izero > -1 {
|
|
return string(slice[:izero]), file
|
|
}
|
|
return string(slice), file
|
|
}
|