forked from TrueCloudLab/frostfs-node
305 lines
9.2 KiB
Go
305 lines
9.2 KiB
Go
package getsvc
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import (
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"context"
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"encoding/hex"
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"errors"
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"fmt"
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"sync"
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"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/policy"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
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apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"go.uber.org/zap"
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"golang.org/x/sync/errgroup"
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)
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var errECPartsRetrieveCompleted = errors.New("EC parts receive completed")
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type ecRemoteStorage interface {
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getObjectFromNode(ctx context.Context, addr oid.Address, info client.NodeInfo) (*objectSDK.Object, error)
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headObjectFromNode(ctx context.Context, addr oid.Address, info client.NodeInfo, raw bool) (*objectSDK.Object, error)
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}
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type assemblerec struct {
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addr oid.Address
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ecInfo *ecInfo
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rng *objectSDK.Range
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remoteStorage ecRemoteStorage
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localStorage localStorage
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cs container.Source
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log *logger.Logger
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head bool
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traverserGenerator traverserGenerator
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epoch uint64
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}
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func newAssemblerEC(
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addr oid.Address,
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ecInfo *ecInfo,
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rng *objectSDK.Range,
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remoteStorage ecRemoteStorage,
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localStorage localStorage,
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cs container.Source,
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log *logger.Logger,
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head bool,
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tg traverserGenerator,
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epoch uint64,
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) *assemblerec {
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return &assemblerec{
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addr: addr,
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rng: rng,
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ecInfo: ecInfo,
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remoteStorage: remoteStorage,
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localStorage: localStorage,
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cs: cs,
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log: log,
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head: head,
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traverserGenerator: tg,
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epoch: epoch,
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}
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}
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// Assemble assembles erasure-coded object and writes it's content to ObjectWriter.
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// It returns parent object.
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func (a *assemblerec) Assemble(ctx context.Context, writer ObjectWriter) (*objectSDK.Object, error) {
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switch {
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case a.head:
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return a.reconstructHeader(ctx, writer)
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case a.rng != nil:
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return a.reconstructRange(ctx, writer)
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default:
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return a.reconstructObject(ctx, writer)
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}
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}
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func (a *assemblerec) getConstructor(cnr *container.Container) (*erasurecode.Constructor, error) {
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dataCount := policy.ECDataCount(cnr.Value.PlacementPolicy())
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parityCount := policy.ECParityCount(cnr.Value.PlacementPolicy())
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return erasurecode.NewConstructor(dataCount, parityCount)
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}
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func (a *assemblerec) reconstructHeader(ctx context.Context, writer ObjectWriter) (*objectSDK.Object, error) {
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obj, err := a.reconstructObjectFromParts(ctx, true)
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if err == nil {
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return obj, writer.WriteHeader(ctx, obj)
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}
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return nil, err
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}
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func (a *assemblerec) reconstructRange(ctx context.Context, writer ObjectWriter) (*objectSDK.Object, error) {
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obj, err := a.reconstructObjectFromParts(ctx, false)
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if err != nil {
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return nil, err
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}
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from := a.rng.GetOffset()
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to := from + a.rng.GetLength()
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if pLen := uint64(len(obj.Payload())); to < from || pLen < from || pLen < to {
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return nil, &apistatus.ObjectOutOfRange{}
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}
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err = writer.WriteChunk(ctx, obj.Payload()[from:to])
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if err != nil {
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return nil, err
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}
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return obj, err
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}
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func (a *assemblerec) reconstructObject(ctx context.Context, writer ObjectWriter) (*objectSDK.Object, error) {
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obj, err := a.reconstructObjectFromParts(ctx, false)
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if err == nil {
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err = writer.WriteHeader(ctx, obj.CutPayload())
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if err == nil {
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err = writer.WriteChunk(ctx, obj.Payload())
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if err != nil {
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return nil, err
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}
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}
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}
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return obj, err
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}
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func (a *assemblerec) reconstructObjectFromParts(ctx context.Context, headers bool) (*objectSDK.Object, error) {
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objID := a.addr.Object()
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trav, cnr, err := a.traverserGenerator.GenerateTraverser(a.addr.Container(), &objID, a.epoch)
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if err != nil {
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return nil, err
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}
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c, err := a.getConstructor(cnr)
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if err != nil {
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return nil, err
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}
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parts := a.retrieveParts(ctx, trav, cnr)
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if headers {
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return c.ReconstructHeader(parts)
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}
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return c.Reconstruct(parts)
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}
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func (a *assemblerec) retrieveParts(ctx context.Context, trav *placement.Traverser, cnr *container.Container) []*objectSDK.Object {
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dataCount := policy.ECDataCount(cnr.Value.PlacementPolicy())
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parityCount := policy.ECParityCount(cnr.Value.PlacementPolicy())
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remoteNodes := make([]placement.Node, 0)
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for {
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batch := trav.Next()
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if len(batch) == 0 {
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break
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}
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remoteNodes = append(remoteNodes, batch...)
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}
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parts, err := a.processECNodesRequests(ctx, remoteNodes, dataCount, parityCount)
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if err != nil {
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a.log.Debug(logs.GetUnableToGetAllPartsECObject, zap.Error(err))
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}
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return parts
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}
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func (a *assemblerec) processECNodesRequests(ctx context.Context, nodes []placement.Node, dataCount, parityCount int) ([]*objectSDK.Object, error) {
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foundChunks := make(map[uint32]*objectSDK.Object)
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var foundChunksGuard sync.Mutex
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eg, ctx := errgroup.WithContext(ctx)
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eg.SetLimit(dataCount)
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for _, ch := range a.ecInfo.localChunks {
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ch := ch
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eg.Go(func() error {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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}
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object := a.tryGetChunkFromLocalStorage(ctx, ch)
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if object == nil {
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return nil
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}
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foundChunksGuard.Lock()
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foundChunks[ch.Index] = object
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count := len(foundChunks)
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foundChunksGuard.Unlock()
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if count >= dataCount {
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return errECPartsRetrieveCompleted
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}
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return nil
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})
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}
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for _, node := range nodes {
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var info client.NodeInfo
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client.NodeInfoFromNetmapElement(&info, node)
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eg.Go(func() error {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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}
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chunks := a.tryGetChunkListFromNode(ctx, info)
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for _, ch := range chunks {
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object := a.tryGetChunkFromRemoteStorage(ctx, info, ch)
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if object == nil {
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continue
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}
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foundChunksGuard.Lock()
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foundChunks[ch.Index] = object
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count := len(foundChunks)
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foundChunksGuard.Unlock()
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if count >= dataCount {
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return errECPartsRetrieveCompleted
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}
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}
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return nil
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})
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}
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err := eg.Wait()
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if err == nil || errors.Is(err, errECPartsRetrieveCompleted) {
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parts := make([]*objectSDK.Object, dataCount+parityCount)
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for idx, chunk := range foundChunks {
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parts[idx] = chunk
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}
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return parts, nil
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}
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return nil, err
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}
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func (a *assemblerec) tryGetChunkFromLocalStorage(ctx context.Context, ch objectSDK.ECChunk) *objectSDK.Object {
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var objID oid.ID
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err := objID.ReadFromV2(ch.ID)
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if err != nil {
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a.log.Error(logs.GetUnableToHeadPartECObject, zap.String("node", "local"), zap.Uint32("part_index", ch.Index), zap.Error(fmt.Errorf("invalid object ID: %w", err)))
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return nil
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}
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var addr oid.Address
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addr.SetContainer(a.addr.Container())
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addr.SetObject(objID)
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var object *objectSDK.Object
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if a.head {
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object, err = a.localStorage.Head(ctx, addr, false)
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if err != nil {
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a.log.Warn(logs.GetUnableToHeadPartECObject, zap.String("node", "local"), zap.Stringer("part_id", objID), zap.Error(err))
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return nil
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}
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} else {
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object, err = a.localStorage.Get(ctx, addr)
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if err != nil {
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a.log.Warn(logs.GetUnableToGetPartECObject, zap.String("node", "local"), zap.Stringer("part_id", objID), zap.Error(err))
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return nil
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}
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}
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return object
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}
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func (a *assemblerec) tryGetChunkListFromNode(ctx context.Context, node client.NodeInfo) []objectSDK.ECChunk {
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if chunks, found := a.ecInfo.remoteChunks[string(node.PublicKey())]; found {
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return chunks
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}
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var errECInfo *objectSDK.ECInfoError
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_, err := a.remoteStorage.headObjectFromNode(ctx, a.addr, node, true)
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if err == nil {
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a.log.Error(logs.GetUnexpectedECObject, zap.String("node", hex.EncodeToString(node.PublicKey())))
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return nil
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}
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if !errors.As(err, &errECInfo) {
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a.log.Warn(logs.GetUnableToHeadPartsECObject, zap.String("node", hex.EncodeToString(node.PublicKey())), zap.Error(err))
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return nil
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}
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result := make([]objectSDK.ECChunk, 0, len(errECInfo.ECInfo().Chunks))
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for _, ch := range errECInfo.ECInfo().Chunks {
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result = append(result, objectSDK.ECChunk(ch))
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}
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return result
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}
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func (a *assemblerec) tryGetChunkFromRemoteStorage(ctx context.Context, node client.NodeInfo, ch objectSDK.ECChunk) *objectSDK.Object {
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var objID oid.ID
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err := objID.ReadFromV2(ch.ID)
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if err != nil {
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a.log.Error(logs.GetUnableToHeadPartECObject, zap.String("node", hex.EncodeToString(node.PublicKey())), zap.Uint32("part_index", ch.Index), zap.Error(fmt.Errorf("invalid object ID: %w", err)))
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return nil
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}
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var addr oid.Address
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addr.SetContainer(a.addr.Container())
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addr.SetObject(objID)
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var object *objectSDK.Object
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if a.head {
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object, err = a.remoteStorage.headObjectFromNode(ctx, addr, node, false)
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if err != nil {
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a.log.Warn(logs.GetUnableToHeadPartECObject, zap.String("node", hex.EncodeToString(node.PublicKey())), zap.Stringer("part_id", objID), zap.Error(err))
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return nil
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}
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} else {
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object, err = a.remoteStorage.getObjectFromNode(ctx, addr, node)
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if err != nil {
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a.log.Warn(logs.GetUnableToGetPartECObject, zap.String("node", hex.EncodeToString(node.PublicKey())), zap.Stringer("part_id", objID), zap.Error(err))
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return nil
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}
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}
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return object
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}
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