correctly check WB requests requirement, improve swagger description (#7521)

Author: adameat

ydb/core/viewer/storage_groups.h

@@ -130,7 +130,6 @@ class TStorageGroups : public TViewerPipeClient {
 
     // BSC
     bool FallbackToWhiteboard = false;
-    bool FillDisksFromWhiteboard = false;
     std::optional<TRequestResponse<NSysView::TEvSysView::TEvGetGroupsResponse>> GetGroupsResponse;
     std::optional<TRequestResponse<NSysView::TEvSysView::TEvGetStoragePoolsResponse>> GetStoragePoolsResponse;
     std::optional<TRequestResponse<NSysView::TEvSysView::TEvGetVSlotsResponse>> GetVSlotsResponse;
@@ -657,7 +656,6 @@ class TStorageGroups : public TViewerPipeClient {
             FieldsRequired |= FieldsBsVSlots;
             FieldsRequired |= FieldsBsPDisks;
         }
-        FillDisksFromWhiteboard = FromStringWithDefault<bool>(params.Get("fill_disks_from_whiteboard"), FillDisksFromWhiteboard);
         TString fieldsRequired = params.Get("fields_required");
         if (!fieldsRequired.empty()) {
             if (fieldsRequired == "all") {
@@ -1169,6 +1167,13 @@ class TStorageGroups : public TViewerPipeClient {
         NKikimrBlobStorage::EVDiskStatus_Parse(info.GetStatusV2(), &vDisk.VDiskStatus);
     }
 
+    bool AreBSControllerRequestsDone() const {
+        return (!GetGroupsResponse || GetGroupsResponse->IsDone()) &&
+               (!GetStoragePoolsResponse || GetStoragePoolsResponse->IsDone()) &&
+               (!GetVSlotsResponse || GetVSlotsResponse->IsDone()) &&
+               (!GetPDisksResponse || GetPDisksResponse->IsDone());
+    }
+
     void ProcessBSControllerResponses() {
         int requestsDone = 0;
         if (GetGroupsResponse && GetGroupsResponse->IsOk() && FieldsNeeded(FieldsBsGroups)) {
@@ -1306,7 +1311,7 @@ class TStorageGroups : public TViewerPipeClient {
                 }
             }
         }
-        if (NoMoreRequests(requestsDone) && FieldsNeeded(FieldsWbDisks)) {
+        if (AreBSControllerRequestsDone() && FieldsNeeded(FieldsWbDisks)) {
             for (TGroup& group : Groups) {
                 for (TNodeId nodeId : group.VDiskNodeIds) {
                     SendWhiteboardDisksRequest(nodeId);
@@ -1748,9 +1753,11 @@ class TStorageGroups : public TViewerPipeClient {
     void HandleTimeout(TEvents::TEvWakeup::TPtr& ev) {
         switch (ev->Get()->Tag) {
             case TimeoutBSC:
-                OnBscError("timeout");
-                Problems.emplace_back("bsc-timeout");
-                RequestDone(FailPipeConnect(GetBSControllerId()));
+                if (!AreBSControllerRequestsDone()) {
+                    OnBscError("timeout");
+                    Problems.emplace_back("bsc-timeout");
+                    RequestDone(FailPipeConnect(GetBSControllerId()));
+                }
                 break;
             case TimeoutFinal:
                 // bread crumbs
@@ -1762,6 +1769,12 @@ class TStorageGroups : public TViewerPipeClient {
                     Problems.emplace_back("wb-incomplete-disks");
                     ProcessWhiteboardDisks();
                 }
+                if (HiveStorageStatsInFlight > 0) {
+                    Problems.emplace_back("hive-incomplete");
+                }
+                if (!AreBSControllerRequestsDone()) {
+                    Problems.emplace_back("bsc-incomplete");
+                }
                 ReplyAndPassAway();
                 break;
         }
@@ -2019,6 +2032,31 @@ class TStorageGroups : public TViewerPipeClient {
                           * `State`
                     required: false
                     type: string
+                  - name: fields_required
+                    in: query
+                    description: >
+                        list of fields required in response (the more - the heavier could be request):
+                          * `GroupId` (always required)
+                          * `PoolName`
+                          * `Kind`
+                          * `MediaType`
+                          * `Erasure`
+                          * `MissingDisks`
+                          * `State`
+                          * `Usage`
+                          * `Used`
+                          * `Limit`
+                          * `Usage`
+                          * `Available`
+                          * `DiskSpaceUsage`
+                          * `Encryption`
+                          * `AllocationUnits`
+                          * `Read`
+                          * `Write`
+                          * `PDisk`
+                          * `VDisk`
+                    required: false
+                    type: string
                   - name: offset
                     in: query
                     description: skip N nodes