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all: add read-only option to database (#22407)

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* all: add read-only option to database

* all: fixes tests

* cmd/geth: migrate flags

* cmd/geth: fix the compact

* cmd/geth: fix the format

* cmd/geth: fix log

* cmd: add chain-readonly

* core: add readonly notion to freezer

* core/rawdb: add log

* core/rawdb: fix freezer close

* cmd: fix

* cmd, core: construct db

* core: update tests
This commit is contained in:
gary rong
2021-03-23 02:06:30 +08:00
committed by GitHub
parent aab35600bc
commit 0c70b83e00
26 changed files with 267 additions and 192 deletions
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18
core/rawdb/freezer.go
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@ -35,6 +35,10 @@ import (
)
var (
// errReadOnly is returned if the freezer is opened in read only mode. All the
// mutations are disallowed.
errReadOnly = errors.New("read only")
// errUnknownTable is returned if the user attempts to read from a table that is
// not tracked by the freezer.
errUnknownTable = errors.New("unknown table")
@ -73,6 +77,7 @@ type freezer struct {
frozen uint64 // Number of blocks already frozen
threshold uint64 // Number of recent blocks not to freeze (params.FullImmutabilityThreshold apart from tests)
readonly bool
tables map[string]*freezerTable // Data tables for storing everything
instanceLock fileutil.Releaser // File-system lock to prevent double opens
@ -84,7 +89,7 @@ type freezer struct {
// newFreezer creates a chain freezer that moves ancient chain data into
// append-only flat file containers.
func newFreezer(datadir string, namespace string) (*freezer, error) {
func newFreezer(datadir string, namespace string, readonly bool) (*freezer, error) {
// Create the initial freezer object
var (
readMeter = metrics.NewRegisteredMeter(namespace+"ancient/read", nil)
@ -106,6 +111,7 @@ func newFreezer(datadir string, namespace string) (*freezer, error) {
}
// Open all the supported data tables
freezer := &freezer{
readonly: readonly,
threshold: params.FullImmutabilityThreshold,
tables: make(map[string]*freezerTable),
instanceLock: lock,
@ -130,7 +136,7 @@ func newFreezer(datadir string, namespace string) (*freezer, error) {
lock.Release()
return nil, err
}
log.Info("Opened ancient database", "database", datadir)
log.Info("Opened ancient database", "database", datadir, "readonly", readonly)
return freezer, nil
}
@ -138,7 +144,7 @@ func newFreezer(datadir string, namespace string) (*freezer, error) {
func (f *freezer) Close() error {
var errs []error
f.closeOnce.Do(func() {
f.quit <- struct{}{}
close(f.quit)
for _, table := range f.tables {
if err := table.Close(); err != nil {
errs = append(errs, err)
@ -191,6 +197,9 @@ func (f *freezer) AncientSize(kind string) (uint64, error) {
// injection will be rejected. But if two injections with same number happen at
// the same time, we can get into the trouble.
func (f *freezer) AppendAncient(number uint64, hash, header, body, receipts, td []byte) (err error) {
if f.readonly {
return errReadOnly
}
// Ensure the binary blobs we are appending is continuous with freezer.
if atomic.LoadUint64(&f.frozen) != number {
return errOutOrderInsertion
@ -233,6 +242,9 @@ func (f *freezer) AppendAncient(number uint64, hash, header, body, receipts, td
// TruncateAncients discards any recent data above the provided threshold number.
func (f *freezer) TruncateAncients(items uint64) error {
if f.readonly {
return errReadOnly
}
if atomic.LoadUint64(&f.frozen) <= items {
return nil
}