package meta import ( "encoding/binary" "errors" "fmt" gio "io" "github.com/TrueCloudLab/frostfs-node/pkg/core/object" objectCore "github.com/TrueCloudLab/frostfs-node/pkg/core/object" storagelog "github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/log" "github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/util" objectSDK "github.com/TrueCloudLab/frostfs-sdk-go/object" oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id" "github.com/nspcc-dev/neo-go/pkg/io" "go.etcd.io/bbolt" ) type ( namedBucketItem struct { name, key, val []byte } ) // PutPrm groups the parameters of Put operation. type PutPrm struct { obj *objectSDK.Object id []byte } // PutRes groups the resulting values of Put operation. type PutRes struct{} // SetObject is a Put option to set object to save. func (p *PutPrm) SetObject(obj *objectSDK.Object) { p.obj = obj } // SetStorageID is a Put option to set storage ID to save. func (p *PutPrm) SetStorageID(id []byte) { p.id = id } var ( ErrUnknownObjectType = errors.New("unknown object type") ErrIncorrectSplitInfoUpdate = errors.New("updating split info on object without it") ErrIncorrectRootObject = errors.New("invalid root object") ) // Put saves object header in metabase. Object payload expected to be cut. // // Returns an error of type apistatus.ObjectAlreadyRemoved if object has been placed in graveyard. // Returns the object.ErrObjectIsExpired if the object is presented but already expired. func (db *DB) Put(prm PutPrm) (res PutRes, err error) { db.modeMtx.RLock() defer db.modeMtx.RUnlock() if db.mode.NoMetabase() { return res, ErrDegradedMode } else if db.mode.ReadOnly() { return res, ErrReadOnlyMode } currEpoch := db.epochState.CurrentEpoch() err = db.boltDB.Batch(func(tx *bbolt.Tx) error { return db.put(tx, prm.obj, prm.id, nil, currEpoch) }) if err == nil { storagelog.Write(db.log, storagelog.AddressField(objectCore.AddressOf(prm.obj)), storagelog.OpField("metabase PUT")) } return } func (db *DB) put( tx *bbolt.Tx, obj *objectSDK.Object, id []byte, si *objectSDK.SplitInfo, currEpoch uint64) error { cnr, ok := obj.ContainerID() if !ok { return errors.New("missing container in object") } isParent := si != nil exists, err := db.exists(tx, object.AddressOf(obj), currEpoch) if errors.As(err, &splitInfoError) { exists = true // object exists, however it is virtual } else if err != nil { return err // return any error besides SplitInfoError } // most right child and split header overlap parent so we have to // check if object exists to not overwrite it twice if exists { // When storage engine moves objects between different sub-storages, // it calls metabase.Put method with new storage ID, thus triggering this code. if !isParent && id != nil { return updateStorageID(tx, object.AddressOf(obj), id) } // when storage already has last object in split hierarchy and there is // a linking object to put (or vice versa), we should update split info // with object ids of these objects if isParent { return updateSplitInfo(tx, object.AddressOf(obj), si) } return nil } if par := obj.Parent(); par != nil && !isParent { // limit depth by two parentSI, err := splitInfoFromObject(obj) if err != nil { return err } err = db.put(tx, par, id, parentSI, currEpoch) if err != nil { return err } } err = putUniqueIndexes(tx, obj, si, id) if err != nil { return fmt.Errorf("can't put unique indexes: %w", err) } err = updateListIndexes(tx, obj, putListIndexItem) if err != nil { return fmt.Errorf("can't put list indexes: %w", err) } err = updateFKBTIndexes(tx, obj, putFKBTIndexItem) if err != nil { return fmt.Errorf("can't put fake bucket tree indexes: %w", err) } // update container volume size estimation if obj.Type() == objectSDK.TypeRegular && !isParent { err = changeContainerSize(tx, cnr, obj.PayloadSize(), true) if err != nil { return err } } if !isParent { err = db.updateCounter(tx, phy, 1, true) if err != nil { return fmt.Errorf("could not increase phy object counter: %w", err) } // it is expected that putting an unavailable object is // impossible and should be handled on the higher levels err = db.updateCounter(tx, logical, 1, true) if err != nil { return fmt.Errorf("could not increase logical object counter: %w", err) } } return nil } func putUniqueIndexes( tx *bbolt.Tx, obj *objectSDK.Object, si *objectSDK.SplitInfo, id []byte, ) error { isParent := si != nil addr := object.AddressOf(obj) cnr := addr.Container() objKey := objectKey(addr.Object(), make([]byte, objectKeySize)) bucketName := make([]byte, bucketKeySize) // add value to primary unique bucket if !isParent { switch obj.Type() { case objectSDK.TypeRegular: bucketName = primaryBucketName(cnr, bucketName) case objectSDK.TypeTombstone: bucketName = tombstoneBucketName(cnr, bucketName) case objectSDK.TypeStorageGroup: bucketName = storageGroupBucketName(cnr, bucketName) case objectSDK.TypeLock: bucketName = bucketNameLockers(cnr, bucketName) default: return ErrUnknownObjectType } rawObject, err := obj.CutPayload().Marshal() if err != nil { return fmt.Errorf("can't marshal object header: %w", err) } err = putUniqueIndexItem(tx, namedBucketItem{ name: bucketName, key: objKey, val: rawObject, }) if err != nil { return err } // index storageID if it is present if id != nil { err = putUniqueIndexItem(tx, namedBucketItem{ name: smallBucketName(cnr, bucketName), key: objKey, val: id, }) if err != nil { return err } } } // index root object if obj.Type() == objectSDK.TypeRegular && !obj.HasParent() { var ( err error splitInfo []byte ) if isParent { splitInfo, err = si.Marshal() if err != nil { return fmt.Errorf("can't marshal split info: %w", err) } } err = putUniqueIndexItem(tx, namedBucketItem{ name: rootBucketName(cnr, bucketName), key: objKey, val: splitInfo, }) if err != nil { return err } } return nil } type updateIndexItemFunc = func(tx *bbolt.Tx, item namedBucketItem) error func updateListIndexes(tx *bbolt.Tx, obj *objectSDK.Object, f updateIndexItemFunc) error { idObj, _ := obj.ID() cnr, _ := obj.ContainerID() objKey := objectKey(idObj, make([]byte, objectKeySize)) bucketName := make([]byte, bucketKeySize) cs, _ := obj.PayloadChecksum() // index payload hashes err := f(tx, namedBucketItem{ name: payloadHashBucketName(cnr, bucketName), key: cs.Value(), val: objKey, }) if err != nil { return err } idParent, ok := obj.ParentID() // index parent ids if ok { err := f(tx, namedBucketItem{ name: parentBucketName(cnr, bucketName), key: objectKey(idParent, make([]byte, objectKeySize)), val: objKey, }) if err != nil { return err } } // index split ids if obj.SplitID() != nil { err := f(tx, namedBucketItem{ name: splitBucketName(cnr, bucketName), key: obj.SplitID().ToV2(), val: objKey, }) if err != nil { return err } } return nil } func updateFKBTIndexes(tx *bbolt.Tx, obj *objectSDK.Object, f updateIndexItemFunc) error { id, _ := obj.ID() cnr, _ := obj.ContainerID() objKey := objectKey(id, make([]byte, objectKeySize)) attrs := obj.Attributes() key := make([]byte, bucketKeySize) err := f(tx, namedBucketItem{ name: ownerBucketName(cnr, key), key: []byte(obj.OwnerID().EncodeToString()), val: objKey, }) if err != nil { return err } // user specified attributes for i := range attrs { key = attributeBucketName(cnr, attrs[i].Key(), key) err := f(tx, namedBucketItem{ name: key, key: []byte(attrs[i].Value()), val: objKey, }) if err != nil { return err } } return nil } func putUniqueIndexItem(tx *bbolt.Tx, item namedBucketItem) error { bkt, err := tx.CreateBucketIfNotExists(item.name) if err != nil { return fmt.Errorf("can't create index %v: %w", item.name, err) } return bkt.Put(item.key, item.val) } func putFKBTIndexItem(tx *bbolt.Tx, item namedBucketItem) error { bkt, err := tx.CreateBucketIfNotExists(item.name) if err != nil { return fmt.Errorf("can't create index %v: %w", item.name, err) } fkbtRoot, err := bkt.CreateBucketIfNotExists(item.key) if err != nil { return fmt.Errorf("can't create fake bucket tree index %v: %w", item.key, err) } return fkbtRoot.Put(item.val, zeroValue) } func putListIndexItem(tx *bbolt.Tx, item namedBucketItem) error { bkt, err := tx.CreateBucketIfNotExists(item.name) if err != nil { return fmt.Errorf("can't create index %v: %w", item.name, err) } lst, err := decodeList(bkt.Get(item.key)) if err != nil { return fmt.Errorf("can't decode leaf list %v: %w", item.key, err) } lst = append(lst, item.val) encodedLst, err := encodeList(lst) if err != nil { return fmt.Errorf("can't encode leaf list %v: %w", item.key, err) } return bkt.Put(item.key, encodedLst) } // encodeList decodes list of bytes into a single blog for list bucket indexes. func encodeList(lst [][]byte) ([]byte, error) { w := io.NewBufBinWriter() w.WriteVarUint(uint64(len(lst))) for i := range lst { w.WriteVarBytes(lst[i]) } if w.Err != nil { return nil, w.Err } return w.Bytes(), nil } // decodeList decodes blob into the list of bytes from list bucket index. func decodeList(data []byte) (lst [][]byte, err error) { if len(data) == 0 { return nil, nil } var offset uint64 size, n, err := getVarUint(data) if err != nil { return nil, err } offset += uint64(n) lst = make([][]byte, size, size+1) for i := range lst { sz, n, err := getVarUint(data[offset:]) if err != nil { return nil, err } offset += uint64(n) next := offset + sz if uint64(len(data)) < next { return nil, gio.ErrUnexpectedEOF } lst[i] = data[offset:next] offset = next } return lst, nil } func getVarUint(data []byte) (uint64, int, error) { if len(data) == 0 { return 0, 0, gio.ErrUnexpectedEOF } switch b := data[0]; b { case 0xfd: if len(data) < 3 { return 0, 1, gio.ErrUnexpectedEOF } return uint64(binary.LittleEndian.Uint16(data[1:])), 3, nil case 0xfe: if len(data) < 5 { return 0, 1, gio.ErrUnexpectedEOF } return uint64(binary.LittleEndian.Uint32(data[1:])), 5, nil case 0xff: if len(data) < 9 { return 0, 1, gio.ErrUnexpectedEOF } return binary.LittleEndian.Uint64(data[1:]), 9, nil default: return uint64(b), 1, nil } } // updateStorageID for existing objects if they were moved from one // storage location to another. func updateStorageID(tx *bbolt.Tx, addr oid.Address, id []byte) error { key := make([]byte, bucketKeySize) bkt, err := tx.CreateBucketIfNotExists(smallBucketName(addr.Container(), key)) if err != nil { return err } return bkt.Put(objectKey(addr.Object(), key), id) } // updateSpliInfo for existing objects if storage filled with extra information // about last object in split hierarchy or linking object. func updateSplitInfo(tx *bbolt.Tx, addr oid.Address, from *objectSDK.SplitInfo) error { key := make([]byte, bucketKeySize) bkt := tx.Bucket(rootBucketName(addr.Container(), key)) if bkt == nil { // if object doesn't exists and we want to update split info on it // then ignore, this should never happen return ErrIncorrectSplitInfoUpdate } objectKey := objectKey(addr.Object(), key) rawSplitInfo := bkt.Get(objectKey) if len(rawSplitInfo) == 0 { return ErrIncorrectSplitInfoUpdate } to := objectSDK.NewSplitInfo() err := to.Unmarshal(rawSplitInfo) if err != nil { return fmt.Errorf("can't unmarshal split info from root index: %w", err) } result := util.MergeSplitInfo(from, to) rawSplitInfo, err = result.Marshal() if err != nil { return fmt.Errorf("can't marhsal merged split info: %w", err) } return bkt.Put(objectKey, rawSplitInfo) } // splitInfoFromObject returns split info based on last or linkin object. // Otherwise returns nil, nil. func splitInfoFromObject(obj *objectSDK.Object) (*objectSDK.SplitInfo, error) { if obj.Parent() == nil { return nil, nil } info := objectSDK.NewSplitInfo() info.SetSplitID(obj.SplitID()) switch { case isLinkObject(obj): id, ok := obj.ID() if !ok { return nil, errors.New("missing object ID") } info.SetLink(id) case isLastObject(obj): id, ok := obj.ID() if !ok { return nil, errors.New("missing object ID") } info.SetLastPart(id) default: return nil, ErrIncorrectRootObject // should never happen } return info, nil } // isLinkObject returns true if object contains parent header and list // of children. func isLinkObject(obj *objectSDK.Object) bool { return len(obj.Children()) > 0 && obj.Parent() != nil } // isLastObject returns true if object contains only parent header without list // of children. func isLastObject(obj *objectSDK.Object) bool { return len(obj.Children()) == 0 && obj.Parent() != nil }