feat: Add new read filtering to datasources guardian (grafana#91345)

* feat: Add new read filtering to datasources guardian

* Apply suggestion to use datasources read guardian check for frontend settings

---------

Co-authored-by: Eric Leijonmarck <[email protected]>

Author: Aaron Godin

pkg/api/datasources.go

@@ -54,7 +54,7 @@ func (hs *HTTPServer) GetDataSources(c *contextmodel.ReqContext) response.Respon
 		return response.Error(http.StatusInternalServerError, "Failed to query datasources", err)
 	}
 
-	filtered, err := hs.dsGuardian.New(c.SignedInUser.OrgID, c.SignedInUser).FilterDatasourcesByQueryPermissions(dataSources)
+	filtered, err := hs.dsGuardian.New(c.SignedInUser.OrgID, c.SignedInUser).FilterDatasourcesByReadPermissions(dataSources)
 	if err != nil {
 		return response.Error(http.StatusInternalServerError, "Failed to query datasources", err)
 	}

pkg/api/frontendsettings.go

@@ -410,7 +410,7 @@ func (hs *HTTPServer) getFSDataSources(c *contextmodel.ReqContext, availablePlug
 			// If RBAC is enabled, it will filter out all datasources for a public user, so we need to skip it
 			orgDataSources = dataSources
 		} else {
-			filtered, err := hs.dsGuardian.New(c.SignedInUser.OrgID, c.SignedInUser).FilterDatasourcesByQueryPermissions(dataSources)
+			filtered, err := hs.dsGuardian.New(c.SignedInUser.OrgID, c.SignedInUser).FilterDatasourcesByReadPermissions(dataSources)
 			if err != nil {
 				return nil, err
 			}

pkg/services/datasources/guardian/allow_guardian.go

@@ -17,3 +17,7 @@ func (n AllowGuardian) CanQuery(datasourceID int64) (bool, error) {
 func (n AllowGuardian) FilterDatasourcesByQueryPermissions(ds []*datasources.DataSource) ([]*datasources.DataSource, error) {
 	return ds, nil
 }
+
+func (n AllowGuardian) FilterDatasourcesByReadPermissions(ds []*datasources.DataSource) ([]*datasources.DataSource, error) {
+	return ds, nil
+}

pkg/services/datasources/guardian/provider.go

@@ -11,6 +11,7 @@ type DatasourceGuardianProvider interface {
 
 type DatasourceGuardian interface {
 	CanQuery(datasourceID int64) (bool, error)
+	FilterDatasourcesByReadPermissions([]*datasources.DataSource) ([]*datasources.DataSource, error)
 	FilterDatasourcesByQueryPermissions([]*datasources.DataSource) ([]*datasources.DataSource, error)
 }