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cmd/geth: add db cmd to show metadata #23900

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merged 3 commits into from Jan 18, 2022
Merged

cmd/geth: add db cmd to show metadata #23900

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7223885
cmd/geth: add db cmd to show metadata
holiman Nov 12, 2021
2580a1b
cmd/geth: better output generator status
holiman Nov 16, 2021
e97279b
cmd: minor
s1na Dec 1, 2021
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61 changes: 61 additions & 0 deletions cmd/geth/dbcmd.go
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Expand Up @@ -37,6 +37,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/trie"
"github.com/olekukonko/tablewriter"
"gopkg.in/urfave/cli.v1"
)

Expand Down Expand Up @@ -69,6 +70,7 @@ Remove blockchain and state databases`,
dbDumpFreezerIndex,
dbImportCmd,
dbExportCmd,
dbMetadataCmd,
},
}
dbInspectCmd = cli.Command{
Expand Down Expand Up @@ -232,6 +234,20 @@ WARNING: This is a low-level operation which may cause database corruption!`,
},
Description: "Exports the specified chain data to an RLP encoded stream, optionally gzip-compressed.",
}
dbMetadataCmd = cli.Command{
Action: utils.MigrateFlags(showMetaData),
Name: "metadata",
Usage: "Shows metadata about the chain status.",
Flags: []cli.Flag{
utils.DataDirFlag,
utils.SyncModeFlag,
utils.MainnetFlag,
utils.RopstenFlag,
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utils.RinkebyFlag,
utils.GoerliFlag,
},
Description: "Shows metadata about the chain status.",
}
)

func removeDB(ctx *cli.Context) error {
Expand Down Expand Up @@ -684,3 +700,48 @@ func exportChaindata(ctx *cli.Context) error {
db := utils.MakeChainDatabase(ctx, stack, true)
return utils.ExportChaindata(ctx.Args().Get(1), kind, exporter(db), stop)
}

func showMetaData(ctx *cli.Context) error {
stack, _ := makeConfigNode(ctx)
defer stack.Close()
db := utils.MakeChainDatabase(ctx, stack, true)
ancients, err := db.Ancients()
if err != nil {
fmt.Fprintf(os.Stderr, "Error accessing ancients: %v", err)
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}
pp := func(val *uint64) string {
if val == nil {
return "<nil>"
}
return fmt.Sprintf("%d (0x%x)", *val, *val)
}
data := [][]string{
{"databaseVersion", pp(rawdb.ReadDatabaseVersion(db))},
{"headBlockHash", fmt.Sprintf("%v", rawdb.ReadHeadBlockHash(db))},
{"headFastBlockHash", fmt.Sprintf("%v", rawdb.ReadHeadFastBlockHash(db))},
{"headHeaderHash", fmt.Sprintf("%v", rawdb.ReadHeadHeaderHash(db))}}
if b := rawdb.ReadHeadBlock(db); b != nil {
data = append(data, []string{"headBlock.Hash", fmt.Sprintf("%v", b.Hash())})
data = append(data, []string{"headBlock.Root", fmt.Sprintf("%v", b.Root())})
data = append(data, []string{"headBlock.Number", fmt.Sprintf("%d (0x%x)", b.Number(), b.Number())})
}
if h := rawdb.ReadHeadHeader(db); h != nil {
data = append(data, []string{"headHeader.Hash", fmt.Sprintf("%v", h.Hash())})
data = append(data, []string{"headHeader.Root", fmt.Sprintf("%v", h.Root)})
data = append(data, []string{"headHeader.Number", fmt.Sprintf("%d (0x%x)", h.Number, h.Number)})
}
data = append(data, [][]string{{"frozen", fmt.Sprintf("%v", ancients)},
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{"lastPivotNumber", pp(rawdb.ReadLastPivotNumber(db))},
{"snapshotSyncStatus", fmt.Sprintf("%d bytes", len(rawdb.ReadSnapshotSyncStatus(db)))},
{"snapshotGenerator", fmt.Sprintf("%x", rawdb.ReadSnapshotGenerator(db))},
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It doesn't make sense to show the byte format generator. Maybe we can decode the content and show the real info? We can define a public function to decode the generator in the snapshot package I think.

{"snapshotDisabled", fmt.Sprintf("%v", rawdb.ReadSnapshotDisabled(db))},
{"snapshotJournal", fmt.Sprintf("%d bytes", len(rawdb.ReadSnapshotJournal(db)))},
{"snapshotRecoveryNumber", pp(rawdb.ReadSnapshotRecoveryNumber(db))},
{"snapshotRoot", fmt.Sprintf("%v", rawdb.ReadSnapshotRoot(db))},
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}...)
table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Field", "Value"})
table.AppendBulk(data)
table.Render()
return nil
}