frostfs-node/pkg/services/netmap/executor.go

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package netmap
import (
"context"
"errors"
"fmt"
"github.com/TrueCloudLab/frostfs-api-go/v2/netmap"
"github.com/TrueCloudLab/frostfs-api-go/v2/refs"
"github.com/TrueCloudLab/frostfs-node/pkg/core/version"
"github.com/TrueCloudLab/frostfs-node/pkg/services/util/response"
netmapSDK "github.com/TrueCloudLab/frostfs-sdk-go/netmap"
versionsdk "github.com/TrueCloudLab/frostfs-sdk-go/version"
)
type executorSvc struct {
version refs.Version
state NodeState
netInfo NetworkInfo
respSvc *response.Service
}
// NodeState encapsulates information
// about current node state.
type NodeState interface {
// Must return current node state
// in FrostFS API v2 NodeInfo structure.
LocalNodeInfo() (*netmap.NodeInfo, error)
// ReadCurrentNetMap reads current local network map of the storage node
// into the given parameter. Returns any error encountered which prevented
// the network map to be read.
ReadCurrentNetMap(*netmap.NetMap) error
}
// NetworkInfo encapsulates source of the
// recent information about the FrostFS network.
type NetworkInfo interface {
// Must return recent network information in FrostFS API v2 NetworkInfo structure.
//
// If protocol version is <=2.9, MillisecondsPerBlock and network config should be unset.
Dump(versionsdk.Version) (*netmapSDK.NetworkInfo, error)
}
func NewExecutionService(s NodeState, v versionsdk.Version, netInfo NetworkInfo, respSvc *response.Service) Server {
if s == nil || netInfo == nil || !version.IsValid(v) || respSvc == nil {
// this should never happen, otherwise it programmers bug
panic("can't create netmap execution service")
}
res := &executorSvc{
state: s,
netInfo: netInfo,
respSvc: respSvc,
}
v.WriteToV2(&res.version)
return res
}
func (s *executorSvc) LocalNodeInfo(
_ context.Context,
req *netmap.LocalNodeInfoRequest) (*netmap.LocalNodeInfoResponse, error) {
verV2 := req.GetMetaHeader().GetVersion()
if verV2 == nil {
return nil, errors.New("missing version")
}
var ver versionsdk.Version
if err := ver.ReadFromV2(*verV2); err != nil {
return nil, fmt.Errorf("can't read version: %w", err)
}
ni, err := s.state.LocalNodeInfo()
if err != nil {
return nil, err
}
if addrNum := ni.NumberOfAddresses(); addrNum > 0 && ver.Minor() <= 7 {
ni2 := new(netmap.NodeInfo)
ni2.SetPublicKey(ni.GetPublicKey())
ni2.SetState(ni.GetState())
ni2.SetAttributes(ni.GetAttributes())
ni.IterateAddresses(func(s string) bool {
ni2.SetAddresses(s)
return true
})
ni = ni2
}
body := new(netmap.LocalNodeInfoResponseBody)
body.SetVersion(&s.version)
body.SetNodeInfo(ni)
resp := new(netmap.LocalNodeInfoResponse)
resp.SetBody(body)
s.respSvc.SetMeta(resp)
return resp, nil
}
func (s *executorSvc) NetworkInfo(
_ context.Context,
req *netmap.NetworkInfoRequest) (*netmap.NetworkInfoResponse, error) {
verV2 := req.GetMetaHeader().GetVersion()
if verV2 == nil {
return nil, errors.New("missing protocol version in meta header")
}
var ver versionsdk.Version
if err := ver.ReadFromV2(*verV2); err != nil {
return nil, fmt.Errorf("can't read version: %w", err)
}
ni, err := s.netInfo.Dump(ver)
if err != nil {
return nil, err
}
var niV2 netmap.NetworkInfo
ni.WriteToV2(&niV2)
body := new(netmap.NetworkInfoResponseBody)
body.SetNetworkInfo(&niV2)
resp := new(netmap.NetworkInfoResponse)
resp.SetBody(body)
s.respSvc.SetMeta(resp)
return resp, nil
}
func (s *executorSvc) Snapshot(_ context.Context, _ *netmap.SnapshotRequest) (*netmap.SnapshotResponse, error) {
var nm netmap.NetMap
err := s.state.ReadCurrentNetMap(&nm)
if err != nil {
return nil, fmt.Errorf("read current local network map: %w", err)
}
body := new(netmap.SnapshotResponseBody)
body.SetNetMap(&nm)
resp := new(netmap.SnapshotResponse)
resp.SetBody(body)
s.respSvc.SetMeta(resp)
return resp, nil
}