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cmd: export preimages in RLP, support GZIP, uniform with block export

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This commit is contained in:
Péter Szilágyi
2018-03-26 13:34:21 +03:00
parent b6b6f52ec8
commit 495bdb0c71
4 changed files with 156 additions and 121 deletions
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175
cmd/geth/chaincmd.go
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@ -40,11 +40,6 @@ import (
"gopkg.in/urfave/cli.v1"
)
var (
// secureKeyPrefix is the database key prefix used to store trie node preimages.
secureKeyPrefix = []byte("secure-key-")
)
var (
initCommand = cli.Command{
Action: utils.MigrateFlags(initGenesis),
@ -100,6 +95,34 @@ Requires a first argument of the file to write to.
Optional second and third arguments control the first and
last block to write. In this mode, the file will be appended
if already existing.`,
}
importPreimagesCommand = cli.Command{
Action: utils.MigrateFlags(importPreimages),
Name: "import-preimages",
Usage: "Import the preimage database from an RLP stream",
ArgsUsage: "<datafile>",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.CacheFlag,
utils.LightModeFlag,
},
Category: "BLOCKCHAIN COMMANDS",
Description: `
The import-preimages command imports hash preimages from an RLP encoded stream.`,
}
exportPreimagesCommand = cli.Command{
Action: utils.MigrateFlags(exportPreimages),
Name: "export-preimages",
Usage: "Export the preimage database into an RLP stream",
ArgsUsage: "<dumpfile>",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.CacheFlag,
utils.LightModeFlag,
},
Category: "BLOCKCHAIN COMMANDS",
Description: `
The export-preimages command export hash preimages to an RLP encoded stream`,
}
copydbCommand = cli.Command{
Action: utils.MigrateFlags(copyDb),
@ -146,34 +169,6 @@ Remove blockchain and state databases`,
The arguments are interpreted as block numbers or hashes.
Use "ethereum dump 0" to dump the genesis block.`,
}
preimageDumpCommand = cli.Command{
Action: utils.MigrateFlags(dumpPreimage),
Name: "preimagedump",
Usage: "Dump the preimage database in json format",
ArgsUsage: "<dumpfile>",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.CacheFlag,
utils.LightModeFlag,
},
Category: "BLOCKCHAIN COMMANDS",
Description: `
Dump the preimage database in json format`,
}
preimageImportCommand = cli.Command{
Action: utils.MigrateFlags(importPreimage),
Name: "preimageimport",
Usage: "Import the preimage data from the specified file",
ArgsUsage: "<datafile>",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.CacheFlag,
utils.LightModeFlag,
},
Category: "BLOCKCHAIN COMMANDS",
Description: `
Import the preimage data from the specified file`,
}
)
// initGenesis will initialise the given JSON format genesis file and writes it as
@ -332,7 +327,39 @@ func exportChain(ctx *cli.Context) error {
if err != nil {
utils.Fatalf("Export error: %v\n", err)
}
fmt.Printf("Export done in %v", time.Since(start))
fmt.Printf("Export done in %v\n", time.Since(start))
return nil
}
// importPreimages imports preimage data from the specified file.
func importPreimages(ctx *cli.Context) error {
if len(ctx.Args()) < 1 {
utils.Fatalf("This command requires an argument.")
}
stack := makeFullNode(ctx)
diskdb := utils.MakeChainDatabase(ctx, stack).(*ethdb.LDBDatabase)
start := time.Now()
if err := utils.ImportPreimages(diskdb, ctx.Args().First()); err != nil {
utils.Fatalf("Export error: %v\n", err)
}
fmt.Printf("Export done in %v\n", time.Since(start))
return nil
}
// exportPreimages dumps the preimage data to specified json file in streaming way.
func exportPreimages(ctx *cli.Context) error {
if len(ctx.Args()) < 1 {
utils.Fatalf("This command requires an argument.")
}
stack := makeFullNode(ctx)
diskdb := utils.MakeChainDatabase(ctx, stack).(*ethdb.LDBDatabase)
start := time.Now()
if err := utils.ExportPreimages(diskdb, ctx.Args().First()); err != nil {
utils.Fatalf("Export error: %v\n", err)
}
fmt.Printf("Export done in %v\n", time.Since(start))
return nil
}
@ -439,86 +466,6 @@ func dump(ctx *cli.Context) error {
return nil
}
// PreimageEntry represents a map between preimage and hash.
type PreimageEntry struct {
Hash string `json:"hash"`
Preimage string `json:"preimage"`
}
// dumpPreimage dumps the preimage data to specified json file in streaming way.
func dumpPreimage(ctx *cli.Context) error {
// Make sure the export json file has been specified.
if len(ctx.Args()) < 1 {
utils.Fatalf("This command requires an argument.")
}
// Encode preimage data to json file in streaming way.
file, err := os.Create(ctx.Args().First())
if err != nil {
return err
}
encoder := json.NewEncoder(file)
stack := makeFullNode(ctx)
db := utils.MakeChainDatabase(ctx, stack)
// Dump all preimage entries.
it := db.(*ethdb.LDBDatabase).NewIteratorByPrefix(secureKeyPrefix)
for it.Next() {
hash := it.Key()[len(secureKeyPrefix):]
if err := encoder.Encode(PreimageEntry{common.Bytes2Hex(hash), common.Bytes2Hex(it.Value())}); err != nil {
return err
}
}
return nil
}
// importPreimages imports preimage data from the specified file.
func importPreimage(ctx *cli.Context) error {
// Make sure the export json file has been specified.
if len(ctx.Args()) < 1 {
utils.Fatalf("This command requires an argument.")
}
// Decode the preimage data in streaming way.
file, err := os.Open(ctx.Args().First())
if err != nil {
return err
}
decoder := json.NewDecoder(file)
stack := makeFullNode(ctx)
db := utils.MakeChainDatabase(ctx, stack)
var (
entry PreimageEntry
preimages = make(map[common.Hash][]byte)
)
for decoder.More() {
if err := decoder.Decode(&entry); err != nil {
return err
}
preimages[common.HexToHash(entry.Hash)] = common.Hex2Bytes(entry.Preimage)
// Flush to database in batch
if len(preimages) > 1024 {
err := core.WritePreimages(db, 0, preimages)
if err != nil {
return err
}
preimages = make(map[common.Hash][]byte)
}
}
// Flush the last batch preimage data
if len(preimages) > 0 {
err := core.WritePreimages(db, 0, preimages)
if err != nil {
return err
}
}
return nil
}
// hashish returns true for strings that look like hashes.
func hashish(x string) bool {
_, err := strconv.Atoi(x)