package engine import ( "fmt" "github.com/google/uuid" "github.com/nspcc-dev/hrw" "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard" "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode" "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr" oid "github.com/nspcc-dev/neofs-sdk-go/object/id" "github.com/panjf2000/ants/v2" "go.uber.org/atomic" "go.uber.org/zap" ) var errShardNotFound = logicerr.New("shard not found") type hashedShard shardWrapper type metricsWithID struct { id string mw MetricRegister } func (m *metricsWithID) SetShardID(id string) { // concurrent settings are not expected => // no mutex protection m.id = id } func (m *metricsWithID) SetObjectCounter(objectType string, v uint64) { m.mw.SetObjectCounter(m.id, objectType, v) } func (m *metricsWithID) AddToObjectCounter(objectType string, delta int) { m.mw.AddToObjectCounter(m.id, objectType, delta) } func (m *metricsWithID) IncObjectCounter(objectType string) { m.mw.AddToObjectCounter(m.id, objectType, +1) } func (m *metricsWithID) DecObjectCounter(objectType string) { m.mw.AddToObjectCounter(m.id, objectType, -1) } // AddShard adds a new shard to the storage engine. // // Returns any error encountered that did not allow adding a shard. // Otherwise returns the ID of the added shard. func (e *StorageEngine) AddShard(opts ...shard.Option) (*shard.ID, error) { sh, err := e.createShard(opts) if err != nil { return nil, fmt.Errorf("could not create a shard: %w", err) } err = e.addShard(sh) if err != nil { return nil, fmt.Errorf("could not add %s shard: %w", sh.ID().String(), err) } return sh.ID(), nil } func (e *StorageEngine) createShard(opts []shard.Option) (*shard.Shard, error) { id, err := generateShardID() if err != nil { return nil, fmt.Errorf("could not generate shard ID: %w", err) } e.mtx.RLock() if e.metrics != nil { opts = append(opts, shard.WithMetricsWriter( &metricsWithID{ id: id.String(), mw: e.metrics, }, )) } e.mtx.RUnlock() sh := shard.New(append(opts, shard.WithID(id), shard.WithExpiredTombstonesCallback(e.processExpiredTombstones), shard.WithExpiredLocksCallback(e.processExpiredLocks), shard.WithDeletedLockCallback(e.processDeletedLocks), shard.WithReportErrorFunc(e.reportShardErrorBackground), )...) if err := sh.UpdateID(); err != nil { return nil, fmt.Errorf("could not update shard ID: %w", err) } return sh, err } func (e *StorageEngine) addShard(sh *shard.Shard) error { e.mtx.Lock() defer e.mtx.Unlock() pool, err := ants.NewPool(int(e.shardPoolSize), ants.WithNonblocking(true)) if err != nil { return fmt.Errorf("could not create pool: %w", err) } strID := sh.ID().String() if _, ok := e.shards[strID]; ok { return fmt.Errorf("shard with id %s was already added", strID) } e.shards[strID] = shardWrapper{ errorCount: atomic.NewUint32(0), Shard: sh, } e.shardPools[strID] = pool return nil } // removeShards removes specified shards. Skips non-existent shards. // Logs errors about shards that it could not Close after the removal. func (e *StorageEngine) removeShards(ids ...string) { if len(ids) == 0 { return } ss := make([]shardWrapper, 0, len(ids)) e.mtx.Lock() for _, id := range ids { sh, found := e.shards[id] if !found { continue } ss = append(ss, sh) delete(e.shards, id) pool, ok := e.shardPools[id] if ok { pool.Release() delete(e.shardPools, id) } e.log.Info("shard has been removed", zap.String("id", id)) } e.mtx.Unlock() for _, sh := range ss { err := sh.Close() if err != nil { e.log.Error("could not close removed shard", zap.Stringer("id", sh.ID()), zap.Error(err), ) } } } func generateShardID() (*shard.ID, error) { uid, err := uuid.NewRandom() if err != nil { return nil, err } bin, err := uid.MarshalBinary() if err != nil { return nil, err } return shard.NewIDFromBytes(bin), nil } func (e *StorageEngine) shardWeight(sh *shard.Shard) float64 { weightValues := sh.WeightValues() return float64(weightValues.FreeSpace) } func (e *StorageEngine) sortShardsByWeight(objAddr interface{ EncodeToString() string }) []hashedShard { e.mtx.RLock() defer e.mtx.RUnlock() shards := make([]hashedShard, 0, len(e.shards)) weights := make([]float64, 0, len(e.shards)) for _, sh := range e.shards { shards = append(shards, hashedShard(sh)) weights = append(weights, e.shardWeight(sh.Shard)) } hrw.SortSliceByWeightValue(shards, weights, hrw.Hash([]byte(objAddr.EncodeToString()))) return shards } func (e *StorageEngine) unsortedShards() []hashedShard { e.mtx.RLock() defer e.mtx.RUnlock() shards := make([]hashedShard, 0, len(e.shards)) for _, sh := range e.shards { shards = append(shards, hashedShard(sh)) } return shards } func (e *StorageEngine) iterateOverSortedShards(addr oid.Address, handler func(int, hashedShard) (stop bool)) { for i, sh := range e.sortShardsByWeight(addr) { if handler(i, sh) { break } } } func (e *StorageEngine) iterateOverUnsortedShards(handler func(hashedShard) (stop bool)) { for _, sh := range e.unsortedShards() { if handler(sh) { break } } } // SetShardMode sets mode of the shard with provided identifier. // // Returns an error if shard mode was not set, or shard was not found in storage engine. func (e *StorageEngine) SetShardMode(id *shard.ID, m mode.Mode, resetErrorCounter bool) error { e.mtx.RLock() defer e.mtx.RUnlock() for shID, sh := range e.shards { if id.String() == shID { if resetErrorCounter { sh.errorCount.Store(0) } return sh.SetMode(m) } } return errShardNotFound } // HandleNewEpoch notifies every shard about NewEpoch event. func (e *StorageEngine) HandleNewEpoch(epoch uint64) { ev := shard.EventNewEpoch(epoch) e.mtx.RLock() defer e.mtx.RUnlock() for _, sh := range e.shards { sh.NotificationChannel() <- ev } } func (s hashedShard) Hash() uint64 { return hrw.Hash( []byte(s.Shard.ID().String()), ) }