package meta import ( "errors" "fmt" "strconv" cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id" "github.com/nspcc-dev/neofs-api-go/pkg/object" objectV2 "github.com/nspcc-dev/neofs-api-go/v2/object" "go.etcd.io/bbolt" ) // ExpiredObject is a descriptor of expired object from DB. type ExpiredObject struct { typ object.Type addr *object.Address } // Type returns type of the expired object. func (e *ExpiredObject) Type() object.Type { return e.typ } // Address returns address of the expired object. func (e *ExpiredObject) Address() *object.Address { return e.addr } // ExpiredObjectHandler is an ExpiredObject handling function. type ExpiredObjectHandler func(*ExpiredObject) error // ErrInterruptIterator is returned by iteration handlers // as a "break" keyword. var ErrInterruptIterator = errors.New("iterator is interrupted") // IterateExpired iterates over all objects in DB which are out of date // relative to epoch. // // If h returns ErrInterruptIterator, nil returns immediately. // Returns other errors of h directly. func (db *DB) IterateExpired(epoch uint64, h ExpiredObjectHandler) error { return db.boltDB.View(func(tx *bbolt.Tx) error { return db.iterateExpired(tx, epoch, h) }) } func (db *DB) iterateExpired(tx *bbolt.Tx, epoch uint64, h ExpiredObjectHandler) error { err := tx.ForEach(func(name []byte, b *bbolt.Bucket) error { cidBytes := cidFromAttributeBucket(name, objectV2.SysAttributeExpEpoch) if cidBytes == nil { return nil } return b.ForEach(func(expKey, _ []byte) error { bktExpired := b.Bucket(expKey) if bktExpired == nil { return nil } expiresAt, err := strconv.ParseUint(string(expKey), 10, 64) if err != nil { return fmt.Errorf("could not parse expiration epoch: %w", err) } else if expiresAt >= epoch { return nil } return bktExpired.ForEach(func(idKey, _ []byte) error { id := object.NewID() err = id.Parse(string(idKey)) if err != nil { return fmt.Errorf("could not parse ID of expired object: %w", err) } cnrID := cid.New() err = cnrID.Parse(string(cidBytes)) if err != nil { return fmt.Errorf("could not parse container ID of expired bucket: %w", err) } addr := object.NewAddress() addr.SetContainerID(cnrID) addr.SetObjectID(id) return h(&ExpiredObject{ typ: objectType(tx, cnrID, idKey), addr: addr, }) }) }) }) if errors.Is(err, ErrInterruptIterator) { err = nil } return err } func objectType(tx *bbolt.Tx, cid *cid.ID, oidBytes []byte) object.Type { switch { default: return object.TypeRegular case inBucket(tx, tombstoneBucketName(cid), oidBytes): return object.TypeTombstone case inBucket(tx, storageGroupBucketName(cid), oidBytes): return object.TypeStorageGroup } } // IterateCoveredByTombstones iterates over all objects in DB which are covered // by tombstone with string address from tss. // // If h returns ErrInterruptIterator, nil returns immediately. // Returns other errors of h directly. // // Does not modify tss. func (db *DB) IterateCoveredByTombstones(tss map[string]struct{}, h func(*object.Address) error) error { return db.boltDB.View(func(tx *bbolt.Tx) error { return db.iterateCoveredByTombstones(tx, tss, h) }) } func (db *DB) iterateCoveredByTombstones(tx *bbolt.Tx, tss map[string]struct{}, h func(*object.Address) error) error { bktGraveyard := tx.Bucket(graveyardBucketName) if bktGraveyard == nil { return nil } err := bktGraveyard.ForEach(func(k, v []byte) error { if _, ok := tss[string(v)]; ok { addr, err := addressFromKey(k) if err != nil { return fmt.Errorf("could not parse address of the object under tombstone: %w", err) } return h(addr) } return nil }) if errors.Is(err, ErrInterruptIterator) { err = nil } return err }