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store.go
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store.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package pvtdatastorage
import (
"sync"
"sync/atomic"
"time"
"github.com/ZihuaZhang/fabric-protos-go/ledger/rwset"
"github.com/ZihuaZhang/fabric-protos-go/ledger/rwset/kvrwset"
"github.com/ZihuaZhang/fabric/common/flogging"
"github.com/ZihuaZhang/fabric/common/ledger/util/leveldbhelper"
"github.com/ZihuaZhang/fabric/core/ledger"
"github.com/ZihuaZhang/fabric/core/ledger/confighistory"
"github.com/ZihuaZhang/fabric/core/ledger/internal/version"
"github.com/ZihuaZhang/fabric/core/ledger/kvledger/txmgmt/rwsetutil"
"github.com/ZihuaZhang/fabric/core/ledger/pvtdatapolicy"
"github.com/ZihuaZhang/fabric/core/ledger/util"
"github.com/bits-and-blooms/bitset"
"github.com/golang/protobuf/proto"
"github.com/pkg/errors"
)
var logger = flogging.MustGetLogger("pvtdatastorage")
// Provider provides handle to specific 'Store' that in turn manages
// private write sets for a ledger
type Provider struct {
dbProvider *leveldbhelper.Provider
pvtData *PrivateDataConfig
}
// PrivateDataConfig encapsulates the configuration for private data storage on the ledger
type PrivateDataConfig struct {
// PrivateDataConfig is used to configure a private data storage provider
*ledger.PrivateDataConfig
// StorePath is the filesystem path for private data storage.
// It is internally computed by the ledger component,
// so it is not in ledger.PrivateDataConfig and not exposed to other components.
StorePath string
}
// Store manages the permanent storage of private write sets for a ledger
type Store struct {
db *leveldbhelper.DBHandle
ledgerid string
btlPolicy pvtdatapolicy.BTLPolicy
batchesInterval int
maxBatchSize int
purgeInterval uint64
purgedKeyAuditLogging bool
isEmpty bool
lastCommittedBlock uint64
bootsnapshotInfo *bootsnapshotInfo
purgerLock sync.Mutex
collElgProcSync *collElgProcSync
// After committing the pvtdata of old blocks,
// the `isLastUpdatedOldBlocksSet` is set to true.
// Once the stateDB is updated with these pvtdata,
// the `isLastUpdatedOldBlocksSet` is set to false.
// isLastUpdatedOldBlocksSet is mainly used during the
// recovery process. During the peer startup, if the
// isLastUpdatedOldBlocksSet is set to true, the pvtdata
// in the stateDB needs to be updated before finishing the
// recovery operation.
isLastUpdatedOldBlocksSet bool
deprioritizedDataReconcilerInterval time.Duration
accessDeprioMissingDataAfter time.Time
}
type bootsnapshotInfo struct {
createdFromSnapshot bool
lastBlockInSnapshot uint64
}
type blkTranNumKey []byte
type PurgeMarker struct {
Ns, Coll string
PvtkeyHash []byte
TxNum uint64
}
type dataEntry struct {
key *dataKey
value *rwset.CollectionPvtReadWriteSet
}
type hashedIndexEntry struct {
key *hashedIndexKey
value string
}
type purgeMarkerEntry struct {
key *purgeMarkerKey
value *purgeMarkerVal
}
type purgeMarkerCollEntry struct {
key *purgeMarkerCollKey
value *purgeMarkerVal
}
type expiryEntry struct {
key *expiryKey
value *ExpiryData
}
type expiryKey struct {
expiringBlk uint64
committingBlk uint64
}
type nsCollBlk struct {
ns, coll string
blkNum uint64
}
type dataKey struct {
nsCollBlk
txNum uint64
}
type missingDataKey struct {
nsCollBlk
}
type bootKVHashesKey struct {
blkNum uint64
txNum uint64
ns string
coll string
}
type hashedIndexKey struct {
ns, coll string
pvtkeyHash []byte
blkNum, txNum uint64
}
type purgeMarkerKey struct {
ns, coll string
pvtkeyHash []byte
}
type purgeMarkerVal struct {
blkNum, txNum uint64
}
type purgeMarkerCollKey struct {
ns, coll string
}
type storeEntries struct {
dataEntries []*dataEntry
hashedIndexEntries []*hashedIndexEntry
purgeMarkerEntries []*purgeMarkerEntry
purgeMarkerCollEntries []*purgeMarkerCollEntry
expiryEntries []*expiryEntry
elgMissingDataEntries map[missingDataKey]*bitset.BitSet
inelgMissingDataEntries map[missingDataKey]*bitset.BitSet
}
// lastUpdatedOldBlocksList keeps the list of last updated blocks
// and is stored as the value of lastUpdatedOldBlocksKey (defined in kv_encoding.go)
type lastUpdatedOldBlocksList []uint64
//////// Provider functions /////////////
//////////////////////////////////////////
// NewProvider instantiates a StoreProvider
func NewProvider(conf *PrivateDataConfig) (*Provider, error) {
dbProvider, err := leveldbhelper.NewProvider(
&leveldbhelper.Conf{
DBPath: conf.StorePath,
ExpectedFormat: currentDataVersion,
})
if err != nil {
return nil, err
}
return &Provider{
dbProvider: dbProvider,
pvtData: conf,
}, nil
}
// SnapshotDataImporterFor returns an implementation of interface privacyenabledstate.SnapshotPvtdataHashesConsumer
// The returned struct is expected to be registered for receiving the pvtdata hashes from snapshot and loads the data
// into pvtdata store.
func (p *Provider) SnapshotDataImporterFor(
ledgerID string,
lastBlockInSnapshot uint64,
membershipProvider ledger.MembershipInfoProvider,
configHistoryRetriever *confighistory.Retriever,
tempDirRoot string,
) (*SnapshotDataImporter, error) {
db := p.dbProvider.GetDBHandle(ledgerID)
batch := db.NewUpdateBatch()
batch.Put(lastBlockInBootSnapshotKey, encodeLastBlockInBootSnapshotVal(lastBlockInSnapshot))
batch.Put(lastCommittedBlkkey, encodeLastCommittedBlockVal(lastBlockInSnapshot))
if err := db.WriteBatch(batch, true); err != nil {
return nil, errors.WithMessage(err, "error while writing snapshot info to db")
}
return newSnapshotDataImporter(
ledgerID,
p.dbProvider.GetDBHandle(ledgerID),
membershipProvider,
configHistoryRetriever,
tempDirRoot,
)
}
// OpenStore returns a handle to a store
func (p *Provider) OpenStore(ledgerid string) (*Store, error) {
dbHandle := p.dbProvider.GetDBHandle(ledgerid)
s := &Store{
db: dbHandle,
ledgerid: ledgerid,
batchesInterval: p.pvtData.BatchesInterval,
maxBatchSize: p.pvtData.MaxBatchSize,
purgeInterval: uint64(p.pvtData.PurgeInterval),
purgedKeyAuditLogging: p.pvtData.PurgedKeyAuditLogging,
deprioritizedDataReconcilerInterval: p.pvtData.DeprioritizedDataReconcilerInterval,
accessDeprioMissingDataAfter: time.Now().Add(p.pvtData.DeprioritizedDataReconcilerInterval),
collElgProcSync: &collElgProcSync{
notification: make(chan bool, 1),
procComplete: make(chan bool, 1),
},
}
if err := s.initState(); err != nil {
return nil, err
}
s.launchCollElgProc()
logger.Debugf("Pvtdata store opened. Initial state: isEmpty [%t], lastCommittedBlock [%d]",
s.isEmpty, s.lastCommittedBlock)
return s, nil
}
// Close closes the store
func (p *Provider) Close() {
p.dbProvider.Close()
}
// Drop drops channel-specific data from the pvtdata store
func (p *Provider) Drop(ledgerid string) error {
return p.dbProvider.Drop(ledgerid)
}
//////// store functions ////////////////
//////////////////////////////////////////
func (s *Store) initState() error {
var err error
if s.isEmpty, s.lastCommittedBlock, err = s.getLastCommittedBlockNum(); err != nil {
return err
}
if s.bootsnapshotInfo, err = s.fetchBootSnapshotInfo(); err != nil {
return err
}
// TODO: FAB-16298 -- the concept of pendingBatch is no longer valid
// for pvtdataStore. We can remove it v2.1. We retain the concept in
// v2.0 to allow rolling upgrade from v142 to v2.0
batchPending, err := s.hasPendingCommit()
if err != nil {
return err
}
if batchPending {
committingBlockNum := s.nextBlockNum()
batch := s.db.NewUpdateBatch()
batch.Put(lastCommittedBlkkey, encodeLastCommittedBlockVal(committingBlockNum))
batch.Delete(pendingCommitKey)
if err := s.db.WriteBatch(batch, true); err != nil {
return err
}
s.isEmpty = false
s.lastCommittedBlock = committingBlockNum
}
var blist lastUpdatedOldBlocksList
if blist, err = s.getLastUpdatedOldBlocksList(); err != nil {
return err
}
if len(blist) > 0 {
s.isLastUpdatedOldBlocksSet = true
} // false if not set
return nil
}
// Init initializes the store. This function is expected to be invoked before using the store
func (s *Store) Init(btlPolicy pvtdatapolicy.BTLPolicy) {
s.btlPolicy = btlPolicy
}
// Commit commits the pvt data as well as both the eligible and ineligible
// missing private data --- `eligible` denotes that the missing private data belongs to a collection
// for which this peer is a member; `ineligible` denotes that the missing private data belong to a
// collection for which this peer is not a member.
func (s *Store) Commit(blockNum uint64, pvtData []*ledger.TxPvtData, missingPvtData ledger.TxMissingPvtData, purgeMarkers []*PurgeMarker) error {
expectedBlockNum := s.nextBlockNum()
if expectedBlockNum != blockNum {
return errors.Errorf("expected block number=%d, received block number=%d", expectedBlockNum, blockNum)
}
batch := s.db.NewUpdateBatch()
var err error
var key, val []byte
storeEntries, err := prepareStoreEntries(blockNum, pvtData, s.btlPolicy, missingPvtData, purgeMarkers)
if err != nil {
return err
}
for _, dataEntry := range storeEntries.dataEntries {
key = encodeDataKey(dataEntry.key)
if val, err = encodeDataValue(dataEntry.value); err != nil {
return err
}
batch.Put(key, val)
}
for _, hashedIndexEntry := range storeEntries.hashedIndexEntries {
key := encodeHashedIndexKey(hashedIndexEntry.key)
batch.Put(key, []byte(hashedIndexEntry.value))
}
for _, purgeMarkerEntry := range storeEntries.purgeMarkerEntries {
batch.Put(
encodePurgeMarkerKey(purgeMarkerEntry.key),
encodePurgeMarkerVal(purgeMarkerEntry.value),
)
batch.Put(
encodePurgeMarkerForReconKey(purgeMarkerEntry.key),
encodePurgeMarkerVal(purgeMarkerEntry.value),
)
}
for _, purgeMarkerCollEntry := range storeEntries.purgeMarkerCollEntries {
batch.Put(
encodePurgeMarkerCollKey(purgeMarkerCollEntry.key),
encodePurgeMarkerVal(purgeMarkerCollEntry.value),
)
}
for _, expiryEntry := range storeEntries.expiryEntries {
key = encodeExpiryKey(expiryEntry.key)
if val, err = encodeExpiryValue(expiryEntry.value); err != nil {
return err
}
batch.Put(key, val)
}
for missingDataKey, missingDataValue := range storeEntries.elgMissingDataEntries {
key = encodeElgPrioMissingDataKey(&missingDataKey)
if val, err = encodeMissingDataValue(missingDataValue); err != nil {
return err
}
batch.Put(key, val)
}
for missingDataKey, missingDataValue := range storeEntries.inelgMissingDataEntries {
key = encodeInelgMissingDataKey(&missingDataKey)
if val, err = encodeMissingDataValue(missingDataValue); err != nil {
return err
}
batch.Put(key, val)
}
committingBlockNum := s.nextBlockNum()
logger.Debugf("Committing private data for block [%d]", committingBlockNum)
batch.Put(lastCommittedBlkkey, encodeLastCommittedBlockVal(committingBlockNum))
if err := s.db.WriteBatch(batch, true); err != nil {
return err
}
s.isEmpty = false
atomic.StoreUint64(&s.lastCommittedBlock, committingBlockNum)
logger.Debugf("Committed private data for block [%d]", committingBlockNum)
s.performPurgeIfScheduled(committingBlockNum)
return nil
}
// GetLastUpdatedOldBlocksPvtData returns the pvtdata of blocks listed in `lastUpdatedOldBlocksList`
// TODO FAB-16293 -- GetLastUpdatedOldBlocksPvtData() can be removed either in v2.0 or in v2.1.
// If we decide to rebuild stateDB in v2.0, by default, the rebuild logic would take
// care of synching stateDB with pvtdataStore without calling GetLastUpdatedOldBlocksPvtData().
// Hence, it can be safely removed. Suppose if we decide not to rebuild stateDB in v2.0,
// we can remove this function in v2.1.
func (s *Store) GetLastUpdatedOldBlocksPvtData() (map[uint64][]*ledger.TxPvtData, error) {
if !s.isLastUpdatedOldBlocksSet {
return nil, nil
}
updatedBlksList, err := s.getLastUpdatedOldBlocksList()
if err != nil {
return nil, err
}
blksPvtData := make(map[uint64][]*ledger.TxPvtData)
for _, blkNum := range updatedBlksList {
if blksPvtData[blkNum], err = s.GetPvtDataByBlockNum(blkNum, nil); err != nil {
return nil, err
}
}
return blksPvtData, nil
}
func (s *Store) getLastUpdatedOldBlocksList() ([]uint64, error) {
var v []byte
var err error
if v, err = s.db.Get(lastUpdatedOldBlocksKey); err != nil {
return nil, err
}
if v == nil {
return nil, nil
}
var updatedBlksList []uint64
buf := proto.NewBuffer(v)
numBlks, err := buf.DecodeVarint()
if err != nil {
return nil, err
}
for i := 0; i < int(numBlks); i++ {
blkNum, err := buf.DecodeVarint()
if err != nil {
return nil, err
}
updatedBlksList = append(updatedBlksList, blkNum)
}
return updatedBlksList, nil
}
// TODO FAB-16294 -- ResetLastUpdatedOldBlocksList() can be removed in v2.1.
// From v2.0 onwards, we do not store the last updatedBlksList. Only to support
// the rolling upgrade from v142 to v2.0, we retain the ResetLastUpdatedOldBlocksList()
// in v2.0.
// ResetLastUpdatedOldBlocksList removes the `lastUpdatedOldBlocksList` entry from the store
func (s *Store) ResetLastUpdatedOldBlocksList() error {
batch := s.db.NewUpdateBatch()
batch.Delete(lastUpdatedOldBlocksKey)
if err := s.db.WriteBatch(batch, true); err != nil {
return err
}
s.isLastUpdatedOldBlocksSet = false
return nil
}
// GetPvtDataByBlockNum returns only the pvt data corresponding to the given block number
// The pvt data is filtered by the list of 'ns/collections' supplied in the filter
// A nil filter does not filter any results
func (s *Store) GetPvtDataByBlockNum(blockNum uint64, filter ledger.PvtNsCollFilter) ([]*ledger.TxPvtData, error) {
logger.Debugf("Get private data for block [%d], filter=%#v", blockNum, filter)
if s.isEmpty {
return nil, errors.New("the store is empty")
}
lastCommittedBlock := atomic.LoadUint64(&s.lastCommittedBlock)
if blockNum > lastCommittedBlock {
return nil, errors.Errorf("last committed block number [%d] smaller than the requested block number [%d]", lastCommittedBlock, blockNum)
}
startKey, endKey := getDataKeysForRangeScanByBlockNum(blockNum)
logger.Debugf("Querying private data storage for write sets using startKey=%#v, endKey=%#v", startKey, endKey)
itr, err := s.db.GetIterator(startKey, endKey)
if err != nil {
return nil, err
}
defer itr.Release()
var blockPvtdata []*ledger.TxPvtData
var currentTxNum uint64
var currentTxWsetAssember *txPvtdataAssembler
firstItr := true
for itr.Next() {
dataKeyBytes := itr.Key()
dataValueBytes := itr.Value()
dataKey, err := decodeDatakey(dataKeyBytes)
if err != nil {
return nil, err
}
expired, err := isExpired(dataKey.nsCollBlk, s.btlPolicy, lastCommittedBlock)
if err != nil {
return nil, err
}
if expired || !passesFilter(dataKey, filter) {
continue
}
if firstItr {
currentTxNum = dataKey.txNum
currentTxWsetAssember = newTxPvtdataAssembler(blockNum, currentTxNum)
firstItr = false
}
if dataKey.txNum != currentTxNum {
blockPvtdata = append(blockPvtdata, currentTxWsetAssember.getTxPvtdata())
currentTxNum = dataKey.txNum
currentTxWsetAssember = newTxPvtdataAssembler(blockNum, currentTxNum)
}
dataValue, err := decodeDataValue(dataValueBytes)
if err != nil {
return nil, err
}
if err := s.removePurgedDataFromCollPvtRWset(dataKey, dataValue); err != nil {
return nil, err
}
currentTxWsetAssember.add(dataKey.ns, dataValue)
}
if currentTxWsetAssember != nil {
blockPvtdata = append(blockPvtdata, currentTxWsetAssember.getTxPvtdata())
}
return blockPvtdata, nil
}
func (s *Store) retrieveLatestPurgeKeyCollMarkerHt(ns, coll string) (*version.Height, error) {
encVal, err := s.db.Get(
encodePurgeMarkerCollKey(
&purgeMarkerCollKey{
ns: ns,
coll: coll,
},
),
)
if err != nil {
return nil, err
}
if encVal == nil {
return nil, nil
}
return decodePurgeMarkerVal(encVal)
}
// keyPotentiallyPurged returns false if `purgeMarkerCollKey` does not exists (which means never any key is purged from the given collection)
// or the height of `purgeMarkerCollKey` is lower than the <ns, coll> in the data key (which means that the last purge of any key from the collection
// was prior to the given key commit). The main purpose of this function is to optimize while filtering the purge data by avoiding computing hashes
// of individual keys, all the time
func (s *Store) keyPotentiallyPurged(k *dataKey) (bool, error) {
purgeKeyCollMarkerHt, err := s.retrieveLatestPurgeKeyCollMarkerHt(k.ns, k.coll)
if purgeKeyCollMarkerHt == nil || err != nil {
return false, err
}
keyHt := &version.Height{
BlockNum: k.blkNum,
TxNum: k.txNum,
}
return keyHt.Compare(purgeKeyCollMarkerHt) <= 0, nil
}
func (s *Store) RemoveAppInitiatedPurgesUsingReconMarker(
kvHashes map[string][]byte, ns, coll string, blkNum, txNum uint64,
) (map[string][]byte, error) {
trimmedKVHashes := map[string][]byte{}
keyHt := &version.Height{
BlockNum: blkNum,
TxNum: txNum,
}
for k, v := range kvHashes {
potentialPurgeMarker := encodePurgeMarkerForReconKey(
&purgeMarkerKey{
ns: ns,
coll: coll,
pvtkeyHash: []byte(k),
},
)
encPurgeMarkerVal, err := s.db.Get(potentialPurgeMarker)
if err != nil {
return nil, err
}
if encPurgeMarkerVal == nil {
trimmedKVHashes[k] = v
continue
}
purgeMarkerHt, err := decodePurgeMarkerVal(encPurgeMarkerVal)
if err != nil {
return nil, err
}
if keyHt.Compare(purgeMarkerHt) > 0 {
trimmedKVHashes[k] = v
}
}
return trimmedKVHashes, nil
}
func (s *Store) removePurgedDataFromCollPvtRWset(k *dataKey, v *rwset.CollectionPvtReadWriteSet) error {
purgePossible, err := s.keyPotentiallyPurged(k)
if !purgePossible || err != nil {
return err
}
collRWSet, err := rwsetutil.CollPvtRwSetFromProtoMsg(v)
if err != nil {
return err
}
keyHt := &version.Height{
BlockNum: k.blkNum,
TxNum: k.txNum,
}
filterInKVWrites := []*kvrwset.KVWrite{}
for _, w := range collRWSet.KvRwSet.Writes {
potentialPurgeMarker := encodePurgeMarkerKey(&purgeMarkerKey{
ns: k.ns,
coll: k.coll,
pvtkeyHash: util.ComputeStringHash(w.Key),
})
encPurgeMarkerVal, err := s.db.Get(potentialPurgeMarker)
if err != nil {
return err
}
if encPurgeMarkerVal == nil {
filterInKVWrites = append(filterInKVWrites, w)
continue
}
purgeMarkerHt, err := decodePurgeMarkerVal(encPurgeMarkerVal)
if err != nil {
return err
}
if keyHt.Compare(purgeMarkerHt) > 0 {
filterInKVWrites = append(filterInKVWrites, w)
continue
}
}
collRWSet.KvRwSet.Writes = filterInKVWrites
if v.Rwset, err = proto.Marshal(collRWSet.KvRwSet); err != nil {
return err
}
return nil
}
// GetMissingPvtDataInfoForMostRecentBlocks returns the missing private data information for the
// most recent `maxBlock` blocks which miss at least a private data of a eligible collection.
func (s *Store) GetMissingPvtDataInfoForMostRecentBlocks(startingBlockNum uint64, maxBlock int) (ledger.MissingPvtDataInfo, error) {
// we assume that this function would be called by the gossip only after processing the
// last retrieved missing pvtdata info and committing the same.
if maxBlock < 1 {
return nil, nil
}
if time.Now().After(s.accessDeprioMissingDataAfter) {
s.accessDeprioMissingDataAfter = time.Now().Add(s.deprioritizedDataReconcilerInterval)
logger.Debug("fetching missing pvtdata entries from the deprioritized list")
return s.getMissingData(elgDeprioritizedMissingDataGroup, startingBlockNum, maxBlock)
}
logger.Debug("fetching missing pvtdata entries from the prioritized list")
return s.getMissingData(elgPrioritizedMissingDataGroup, startingBlockNum, maxBlock)
}
func (s *Store) getMissingData(group []byte, startingBlockNum uint64, maxBlock int) (ledger.MissingPvtDataInfo, error) {
missingPvtDataInfo := make(ledger.MissingPvtDataInfo)
numberOfBlockProcessed := 0
lastProcessedBlock := uint64(0)
isMaxBlockLimitReached := false
startKey, endKey := createRangeScanKeysForElgMissingData(startingBlockNum, group)
dbItr, err := s.db.GetIterator(startKey, endKey)
if err != nil {
return nil, err
}
defer dbItr.Release()
for dbItr.Next() {
missingDataKeyBytes := dbItr.Key()
missingDataKey := decodeElgMissingDataKey(missingDataKeyBytes)
if isMaxBlockLimitReached && (missingDataKey.blkNum != lastProcessedBlock) {
// ensures that exactly maxBlock number
// of blocks' entries are processed
break
}
// check whether the entry is expired. If so, move to the next item.
// As we may use the old lastCommittedBlock value, there is a possibility that
// this missing data is actually expired but we may get the stale information.
// Though it may leads to extra work of pulling the expired data, it will not
// affect the correctness. Further, as we try to fetch the most recent missing
// data (less possibility of expiring now), such scenario would be rare. In the
// best case, we can load the latest lastCommittedBlock value here atomically to
// make this scenario very rare.
lastCommittedBlock := atomic.LoadUint64(&s.lastCommittedBlock)
expired, err := isExpired(missingDataKey.nsCollBlk, s.btlPolicy, lastCommittedBlock)
if err != nil {
return nil, err
}
if expired {
continue
}
// check for an existing entry for the blkNum in the MissingPvtDataInfo.
// If no such entry exists, create one. Also, keep track of the number of
// processed block due to maxBlock limit.
if _, ok := missingPvtDataInfo[missingDataKey.blkNum]; !ok {
numberOfBlockProcessed++
if numberOfBlockProcessed == maxBlock {
isMaxBlockLimitReached = true
// as there can be more than one entry for this block,
// we cannot `break` here
lastProcessedBlock = missingDataKey.blkNum
}
}
valueBytes := dbItr.Value()
bitmap, err := decodeMissingDataValue(valueBytes)
if err != nil {
return nil, err
}
// for each transaction which misses private data, make an entry in missingBlockPvtDataInfo
for index, isSet := bitmap.NextSet(0); isSet; index, isSet = bitmap.NextSet(index + 1) {
txNum := uint64(index)
missingPvtDataInfo.Add(missingDataKey.blkNum, txNum, missingDataKey.ns, missingDataKey.coll)
}
}
return missingPvtDataInfo, nil
}
// FetchBootKVHashes returns the KVHashes from the data that was loaded from a snapshot at the time of
// bootstrapping. This function returns an error if the supplied blkNum is greater than the last block
// number in the booting snapshot
func (s *Store) FetchBootKVHashes(blkNum, txNum uint64, ns, coll string) (map[string][]byte, error) {
if s.bootsnapshotInfo.createdFromSnapshot && blkNum > s.bootsnapshotInfo.lastBlockInSnapshot {
return nil, errors.New(
"unexpected call. Boot KV Hashes are persisted only for the data imported from snapshot",
)
}
encVal, err := s.db.Get(
encodeBootKVHashesKey(
&bootKVHashesKey{
blkNum: blkNum,
txNum: txNum,
ns: ns,
coll: coll,
},
),
)
if err != nil || encVal == nil {
return nil, err
}
bootKVHashes, err := decodeBootKVHashesVal(encVal)
if err != nil {
return nil, err
}
return bootKVHashes.toMap(), nil
}
// ProcessCollsEligibilityEnabled notifies the store when the peer becomes eligible to receive data for an
// existing collection. Parameter 'committingBlk' refers to the block number that contains the corresponding
// collection upgrade transaction and the parameter 'nsCollMap' contains the collections for which the peer
// is now eligible to receive pvt data
func (s *Store) ProcessCollsEligibilityEnabled(committingBlk uint64, nsCollMap map[string][]string) error {
key := encodeCollElgKey(committingBlk)
m := newCollElgInfo(nsCollMap)
val, err := encodeCollElgVal(m)
if err != nil {
return err
}
batch := s.db.NewUpdateBatch()
batch.Put(key, val)
if err = s.db.WriteBatch(batch, true); err != nil {
return err
}
s.collElgProcSync.notify()
return nil
}
func (s *Store) performPurgeIfScheduled(latestCommittedBlk uint64) {
if latestCommittedBlk%s.purgeInterval != 0 {
return
}
go func() {
s.purgerLock.Lock()
logger.Debugf("Purger started: Removing expired and purged private data till block number [%d]", latestCommittedBlk)
defer s.purgerLock.Unlock()
if err := s.purgeExpiredData(0, latestCommittedBlk); err != nil {
logger.Warningf("Could not purge expired data from pvtdata store:%s", err)
}
if err := s.deleteDataMarkedForPurge(); err != nil {
logger.Warningf("Could not purge data marked for purge from pvtdata store:%s", err)
}
logger.Debug("Purger finished")
}()
}
func (s *Store) purgeExpiredData(minBlkNum, maxBlkNum uint64) error {
expiryEntries, err := s.retrieveExpiryEntries(minBlkNum, maxBlkNum)
if err != nil || len(expiryEntries) == 0 {
return err
}
batch := s.db.NewUpdateBatch()
for _, expiryEntry := range expiryEntries {
batch.Delete(encodeExpiryKey(expiryEntry.key))
dataKeys, missingDataKeys, bootKVHashesKeys := deriveKeys(expiryEntry)
for _, dataKey := range dataKeys {
batch.Delete(encodeDataKey(dataKey))
}
for _, missingDataKey := range missingDataKeys {
batch.Delete(
encodeElgPrioMissingDataKey(missingDataKey),
)
batch.Delete(
encodeElgDeprioMissingDataKey(missingDataKey),
)
batch.Delete(
encodeInelgMissingDataKey(missingDataKey),
)
}
for _, bootKVHashesKey := range bootKVHashesKeys {
batch.Delete(encodeBootKVHashesKey(bootKVHashesKey))
}
dataEntries, err := s.retrieveDataEntries(dataKeys)
if err != nil {
return err
}
hashedIndexEntries, err := prepareHashedIndexEntries(dataEntries)
if err != nil {
return err
}
for _, hashedIndexEntry := range hashedIndexEntries {
batch.Delete(encodeHashedIndexKey(hashedIndexEntry.key))
}
if err := s.db.WriteBatch(batch, false); err != nil {
return err
}
batch.Reset()
}
logger.Infow("Expired keys removed from private data storage", "channel", s.ledgerid, "numExpired", len(expiryEntries), "blockNum", maxBlkNum)
return nil
}
func (s *Store) deleteDataMarkedForPurge() error {
maxBatchSize := 4 * 1024 * 1024 // 4Mb
purgeMarkerCounter := 0
hashedIndexCounter := 0
p := newPurgeUpdatesProcessor(s.ledgerid, s.db, s.purgedKeyAuditLogging, maxBatchSize)
pStart, pEnd := rangeScanKeysForPurgeMarkers()
// get the purge markers that need to be processed at this block height
purgeMarkerIter, err := s.db.GetIterator(pStart, pEnd)
if err != nil {
return err
}
for purgeMarkerIter.Next() {
if err := purgeMarkerIter.Error(); err != nil {
return err
}
encPurgeMarkerKey := purgeMarkerIter.Key()
encPurgeMarkerVal := purgeMarkerIter.Value()
// for each purge marker to be processed, get the hashed index entries that need to be purged on this peer
hStart, hEnd, err := driveHashedIndexKeyRangeFromPurgeMarker(encPurgeMarkerKey, encPurgeMarkerVal)
if err != nil {
return err
}
hashedIndexIter, err := s.db.GetIterator(hStart, hEnd)
if err != nil {
return err
}
for hashedIndexIter.Next() {
if err := hashedIndexIter.Error(); err != nil {
return err
}
// for each hashed index entry, process the purge from private data store and delete the hashed index
if err := p.process(hashedIndexIter.Key(), hashedIndexIter.Value()); err != nil {
return err
}
hashedIndexCounter++
}
// also delete the purge marker itself
p.addProcessedPurgeMarkerForDeletion(encPurgeMarkerKey)
purgeMarkerCounter++
}
// commit the private data purges and index deletions to the private data store
err = p.commitPendingChanges()
if err != nil {
return err
}
if purgeMarkerCounter > 0 {
logger.Infow("Purged private data from private data storage", "channel", s.ledgerid, "numKeysPurged", purgeMarkerCounter, "numPrivateDataStoreRecordsPurged", hashedIndexCounter)
}
return nil
}
func (s *Store) retrieveExpiryEntries(minBlkNum, maxBlkNum uint64) ([]*expiryEntry, error) {
startKey, endKey := getExpiryKeysForRangeScan(minBlkNum, maxBlkNum)
logger.Debugf("retrieveExpiryEntries(): startKey=%#v, endKey=%#v", startKey, endKey)
itr, err := s.db.GetIterator(startKey, endKey)
if err != nil {
return nil, err
}
defer itr.Release()
var expiryEntries []*expiryEntry
for itr.Next() {
expiryKeyBytes := itr.Key()
expiryValueBytes := itr.Value()
expiryKey, err := decodeExpiryKey(expiryKeyBytes)
if err != nil {
return nil, err
}
expiryValue, err := decodeExpiryValue(expiryValueBytes)
if err != nil {
return nil, err
}
expiryEntries = append(expiryEntries, &expiryEntry{key: expiryKey, value: expiryValue})
}
return expiryEntries, nil
}
func (s *Store) retrieveDataEntries(dataKeys []*dataKey) ([]*dataEntry, error) {
dataEntries := []*dataEntry{}
for _, k := range dataKeys {
v, err := s.db.Get(encodeDataKey(k))
if err != nil {
return nil, err
}
collWS, err := decodeDataValue(v)
if err != nil {
return nil, err
}
dataEntries = append(dataEntries,
&dataEntry{
key: k,
value: collWS,
})
}
return dataEntries, nil
}
func (s *Store) launchCollElgProc() {
go func() {
if err := s.processCollElgEvents(); err != nil {
// process collection eligibility events when store is opened -
// in case there is an unprocessed events from previous run
logger.Errorw("failed to process collection eligibility events", "err", err)
}
for {
logger.Debugf("Waiting for collection eligibility event")
s.collElgProcSync.waitForNotification()
if err := s.processCollElgEvents(); err != nil {
logger.Errorw("failed to process collection eligibility events", "err", err)
}
s.collElgProcSync.done()
}
}()
}
func (s *Store) processCollElgEvents() error {
logger.Debugf("Starting to process collection eligibility events")
s.purgerLock.Lock()
defer s.purgerLock.Unlock()
collElgStartKey, collElgEndKey := createRangeScanKeysForCollElg()