forked from TrueCloudLab/frostfs-node
73f8bb3e5f
Allow to extend blobstor with more storage sub-systems. Currently objects stored in the FSTree have empty byte slice descriptor and object from blobovnicza tree have the same id as earlier. Each such change in the identifier formation should be accompanied with metabase version increase. Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
package shard
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import (
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/writecache"
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apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
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"github.com/nspcc-dev/neofs-sdk-go/object"
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oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
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)
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// RngPrm groups the parameters of GetRange operation.
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type RngPrm struct {
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ln uint64
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off uint64
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addr oid.Address
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skipMeta bool
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}
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// RngRes groups the resulting values of GetRange operation.
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type RngRes struct {
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obj *object.Object
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hasMeta bool
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}
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// SetAddress is a Rng option to set the address of the requested object.
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//
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// Option is required.
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func (p *RngPrm) SetAddress(addr oid.Address) {
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p.addr = addr
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}
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// SetRange is a GetRange option to set range of requested payload data.
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func (p *RngPrm) SetRange(off uint64, ln uint64) {
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p.off, p.ln = off, ln
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}
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// SetIgnoreMeta is a Get option try to fetch object from blobstor directly,
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// without accessing metabase.
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func (p *RngPrm) SetIgnoreMeta(ignore bool) {
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p.skipMeta = ignore
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}
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// Object returns the requested object part.
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//
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// Instance payload contains the requested range of the original object.
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func (r RngRes) Object() *object.Object {
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return r.obj
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}
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// HasMeta returns true if info about the object was found in the metabase.
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func (r RngRes) HasMeta() bool {
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return r.hasMeta
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}
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// GetRange reads part of an object from shard.
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//
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// Returns any error encountered that
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// did not allow to completely read the object part.
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//
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// Returns ErrRangeOutOfBounds if the requested object range is out of bounds.
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// Returns an error of type apistatus.ObjectNotFound if the requested object is missing.
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// Returns an error of type apistatus.ObjectAlreadyRemoved if the requested object has been marked as removed in shard.
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// Returns the object.ErrObjectIsExpired if the object is presented but already expired.
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func (s *Shard) GetRange(prm RngPrm) (RngRes, error) {
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cb := func(stor *blobstor.BlobStor, id []byte) (*object.Object, error) {
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var getRngPrm common.GetRangePrm
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getRngPrm.Address = prm.addr
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getRngPrm.Range.SetOffset(prm.off)
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getRngPrm.Range.SetLength(prm.ln)
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getRngPrm.StorageID = id
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res, err := stor.GetRange(getRngPrm)
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if err != nil {
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return nil, err
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}
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obj := object.New()
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obj.SetPayload(res.Data)
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return obj, nil
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}
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wc := func(c writecache.Cache) (*object.Object, error) {
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res, err := c.Get(prm.addr)
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if err != nil {
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return nil, err
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}
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payload := res.Payload()
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from := prm.off
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to := from + prm.ln
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if pLen := uint64(len(payload)); to < from || pLen < from || pLen < to {
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return nil, apistatus.ObjectOutOfRange{}
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}
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obj := object.New()
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obj.SetPayload(payload[from:to])
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return obj, nil
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}
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skipMeta := prm.skipMeta || s.GetMode().NoMetabase()
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obj, hasMeta, err := s.fetchObjectData(prm.addr, skipMeta, cb, wc)
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return RngRes{
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obj: obj,
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hasMeta: hasMeta,
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}, err
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}
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