[#1048] control: Add ListShards implementation to ctrl svc

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

pkg/services/control/server/list_shards.go

@@ -0,0 +1,50 @@
+package control
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-node/pkg/services/control"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func (s *Server) ListShards(_ context.Context, req *control.ListShardsRequest) (*control.ListShardsResponse, error) {
+	// verify request
+	if err := s.isValidRequest(req); err != nil {
+		return nil, status.Error(codes.PermissionDenied, err.Error())
+	}
+
+	// create and fill response
+	resp := new(control.ListShardsResponse)
+
+	body := new(control.ListShardsResponse_Body)
+	resp.SetBody(body)
+
+	info := s.s.DumpInfo()
+
+	shardInfos := make([]*control.ShardInfo, 0, len(info.Shards))
+
+	for _, shard := range info.Shards {
+		si := new(control.ShardInfo)
+
+		si.SetID(*shard.ID)
+		si.SetMetabasePath(shard.MetaBaseInfo.Path)
+		si.SetBlobstorePath(shard.BlobStorInfo.RootPath)
+		si.SetWriteCachePath(shard.WriteCacheInfo.Path)
+
+		// FIXME: use real shard mode when there are more than just `read-write`
+		// after https://github.com/nspcc-dev/neofs-node/issues/1044
+		si.SetMode(control.ShardMode_READ_WRITE)
+
+		shardInfos = append(shardInfos, si)
+	}
+
+	body.SetShards(shardInfos)
+
+	// sign the response
+	if err := SignMessage(s.key, resp); err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return resp, nil
+}