frostfs-node/pkg/services/object_manager/placement/netmap.go

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package placement
import (
"crypto/sha256"
"errors"
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
netmapSDK "github.com/nspcc-dev/neofs-sdk-go/netmap"
addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address"
oidSDK "github.com/nspcc-dev/neofs-sdk-go/object/id"
)
type netMapBuilder struct {
nmSrc netmap.Source
}
type netMapSrc struct {
netmap.Source
nm *netmapSDK.Netmap
}
func NewNetworkMapBuilder(nm *netmapSDK.Netmap) Builder {
return &netMapBuilder{
nmSrc: &netMapSrc{nm: nm},
}
}
func NewNetworkMapSourceBuilder(nmSrc netmap.Source) Builder {
return &netMapBuilder{
nmSrc: nmSrc,
}
}
func (s *netMapSrc) GetNetMap(diff uint64) (*netmapSDK.Netmap, error) {
return s.nm, nil
}
func (b *netMapBuilder) BuildPlacement(a *addressSDK.Address, p *netmapSDK.PlacementPolicy) ([]netmapSDK.Nodes, error) {
cnr, ok := a.ContainerID()
if !ok {
return nil, errors.New("missing container in object address")
}
nm, err := netmap.GetLatestNetworkMap(b.nmSrc)
if err != nil {
return nil, fmt.Errorf("could not get network map: %w", err)
}
binCnr := make([]byte, sha256.Size)
cnr.Encode(binCnr)
cn, err := nm.GetContainerNodes(p, binCnr)
if err != nil {
return nil, fmt.Errorf("could not get container nodes: %w", err)
}
var idPtr *oidSDK.ID
if id, ok := a.ObjectID(); ok {
idPtr = &id
}
return BuildObjectPlacement(nm, cn, idPtr)
}
func BuildObjectPlacement(nm *netmapSDK.Netmap, cnrNodes netmapSDK.ContainerNodes, id *oidSDK.ID) ([]netmapSDK.Nodes, error) {
if id == nil {
return cnrNodes.Replicas(), nil
}
binObj := make([]byte, sha256.Size)
id.Encode(binObj)
on, err := nm.GetPlacementVectors(cnrNodes, binObj)
if err != nil {
return nil, fmt.Errorf("could not get placement vectors for object: %w", err)
}
return on, nil
}
// FlattenNodes appends each row to the flat list.
func FlattenNodes(ns []netmapSDK.Nodes) netmapSDK.Nodes {
result := make(netmapSDK.Nodes, 0, len(ns))
for i := range ns {
result = append(result, ns[i]...)
}
return result
}