[#1059] control: Add `SetShardMode` implementation to ctrl svc

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

pkg/services/control/server/set_shard_mode.go

@@ -0,0 +1,54 @@
+package control
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
+	"github.com/nspcc-dev/neofs-node/pkg/services/control"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func (s *Server) SetShardMode(_ context.Context, req *control.SetShardModeRequest) (*control.SetShardModeResponse, error) {
+	// verify request
+	err := s.isValidRequest(req)
+	if err != nil {
+		return nil, status.Error(codes.PermissionDenied, err.Error())
+	}
+
+	var (
+		mode shard.Mode
+
+		requestedMode  = req.GetBody().GetMode()
+		requestedShard = shard.NewIDFromBytes(req.Body.GetShard_ID())
+	)
+
+	switch requestedMode {
+	case control.ShardMode_READ_WRITE:
+		mode = shard.ModeReadWrite
+	case control.ShardMode_READ_ONLY:
+		mode = shard.ModeReadOnly
+	default:
+		return nil, status.Error(codes.Internal, fmt.Sprintf("unknown shard mode: %s", requestedMode))
+	}
+
+	err = s.s.SetShardMode(requestedShard, mode)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	// create and fill response
+	resp := new(control.SetShardModeResponse)
+
+	body := new(control.SetShardModeResponse_Body)
+	resp.SetBody(body)
+
+	// sign the response
+	err = SignMessage(s.key, resp)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return resp, nil
+}