forked from TrueCloudLab/frostfs-node
153 lines
4.6 KiB
Go
153 lines
4.6 KiB
Go
package blobovniczatree
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import (
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"context"
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"encoding/hex"
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"fmt"
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"strconv"
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"time"
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"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobovnicza"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
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tracingPkg "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/tracing"
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"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
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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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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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)
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// GetRange reads range of object payload data from blobovnicza tree.
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//
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// If blobocvnicza ID is specified, only this blobovnicza is processed.
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// Otherwise, all Blobovniczas are processed descending weight.
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func (b *Blobovniczas) GetRange(ctx context.Context, prm common.GetRangePrm) (res common.GetRangeRes, err error) {
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var (
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startedAt = time.Now()
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success = false
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size = 0
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)
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defer func() {
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b.metrics.GetRange(time.Since(startedAt), size, success, prm.StorageID != nil)
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}()
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ctx, span := tracing.StartSpanFromContext(ctx, "Blobovniczas.GetRange",
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trace.WithAttributes(
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attribute.String("path", b.rootPath),
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attribute.String("address", prm.Address.EncodeToString()),
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attribute.String("storage_id", hex.EncodeToString(prm.StorageID)),
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attribute.String("offset", strconv.FormatUint(prm.Range.GetOffset(), 10)),
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attribute.String("length", strconv.FormatUint(prm.Range.GetLength(), 10)),
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))
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defer span.End()
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if prm.StorageID != nil {
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id := blobovnicza.NewIDFromBytes(prm.StorageID)
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shBlz := b.getBlobovnicza(id.String())
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blz, err := shBlz.Open()
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if err != nil {
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return common.GetRangeRes{}, err
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}
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defer shBlz.Close()
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res, err := b.getObjectRange(ctx, blz, prm)
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if err == nil {
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size = len(res.Data)
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success = true
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}
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return res, err
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}
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objectFound := false
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err = b.iterateSortedLeaves(ctx, &prm.Address, func(p string) (bool, error) {
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res, err = b.getRangeFromLevel(ctx, prm, p)
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if err != nil {
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outOfBounds := isErrOutOfRange(err)
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if !outOfBounds && !client.IsErrObjectNotFound(err) {
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b.log.Debug(logs.BlobovniczatreeCouldNotGetObjectFromLevel,
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zap.String("level", p),
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zap.String("error", err.Error()),
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zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
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}
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if outOfBounds {
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return true, err
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}
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}
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objectFound = err == nil
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// abort iterator if found, otherwise process all Blobovniczas
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return err == nil, nil
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})
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if err == nil && !objectFound {
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// not found in any blobovnicza
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return common.GetRangeRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
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}
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if err == nil {
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success = true
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size = len(res.Data)
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}
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return
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}
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// tries to read range of object payload data from particular blobovnicza.
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//
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// returns error if object could not be read from any blobovnicza of the same level.
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func (b *Blobovniczas) getRangeFromLevel(ctx context.Context, prm common.GetRangePrm, blzPath string) (common.GetRangeRes, error) {
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// open blobovnicza (cached inside)
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shBlz := b.getBlobovnicza(blzPath)
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blz, err := shBlz.Open()
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if err != nil {
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return common.GetRangeRes{}, err
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}
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defer shBlz.Close()
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return b.getObjectRange(ctx, blz, prm)
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}
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// reads range of object payload data from blobovnicza and returns GetRangeSmallRes.
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func (b *Blobovniczas) getObjectRange(ctx context.Context, blz *blobovnicza.Blobovnicza, prm common.GetRangePrm) (common.GetRangeRes, error) {
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var gPrm blobovnicza.GetPrm
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gPrm.SetAddress(prm.Address)
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// we don't use GetRange call for now since blobovnicza
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// stores data that is compressed on BlobStor side.
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// If blobovnicza learns to do the compression itself,
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// we can start using GetRange.
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res, err := blz.Get(ctx, gPrm)
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if err != nil {
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return common.GetRangeRes{}, err
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}
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// decompress the data
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data, err := b.compression.Decompress(res.Object())
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if err != nil {
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return common.GetRangeRes{}, fmt.Errorf("could not decompress object data: %w", err)
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}
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// unmarshal the object
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obj := objectSDK.New()
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if err := obj.Unmarshal(data); err != nil {
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return common.GetRangeRes{}, fmt.Errorf("could not unmarshal the object: %w", err)
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}
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from := prm.Range.GetOffset()
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to := from + prm.Range.GetLength()
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payload := obj.Payload()
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if pLen := uint64(len(payload)); to < from || pLen < from || pLen < to {
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return common.GetRangeRes{}, logicerr.Wrap(new(apistatus.ObjectOutOfRange))
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}
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return common.GetRangeRes{
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Data: payload[from:to],
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}, nil
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}
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