Handle forks in Gitlab::Checks::LfsIntegrity

app/controllers/concerns/lfs_request.rb

@@ -91,15 +91,7 @@ module LfsRequest
   end
   def storage_project
-    @storage_project ||= begin
-      result = project
-
-      # TODO: Make this go to the fork_network root immeadiatly
-      # dependant on the discussion in: https://gitlab.com/gitlab-org/gitlab-ce/issues/39769
-      result = result.fork_source while result.forked?
-
-      result
-    end
+    @storage_project ||= project.lfs_storage_project
   end
   def objects

app/models/lfs_object.rb

@@ -6,16 +6,8 @@ class LfsObject < ActiveRecord::Base
   mount_uploader :file, LfsObjectUploader
-  def storage_project(project)
-    if project && project.forked?
-      storage_project(project.forked_from_project)
-    else
-      project
-    end
-  end
-
   def project_allowed_access?(project)
-    projects.exists?(storage_project(project).id)
+    projects.exists?(project.lfs_storage_project.id)
   end
   def self.destroy_unreferenced

app/models/project.rb

@@ -1042,6 +1042,18 @@ class Project < ActiveRecord::Base
     forked_from_project || fork_network&.root_project
   end
+  def lfs_storage_project
+    @lfs_storage_project ||= begin
+      result = self
+
+      # TODO: Make this go to the fork_network root immeadiatly
+      # dependant on the discussion in: https://gitlab.com/gitlab-org/gitlab-ce/issues/39769
+      result = result.fork_source while result&.forked?
+
+      result || self
+    end
+  end
+
   def personal?
     !group
   end

lib/gitlab/checks/lfs_integrity.rb

@@ -15,7 +15,10 @@ module Gitlab
         return false unless new_lfs_pointers.present?
-        existing_count = @project.lfs_objects.where(oid: new_lfs_pointers.map(&:lfs_oid)).count
+        existing_count = @project.lfs_storage_project
+                                 .lfs_objects
+                                 .where(oid: new_lfs_pointers.map(&:lfs_oid))
+                                 .count
         existing_count != new_lfs_pointers.count
       end

spec/lib/gitlab/checks/lfs_integrity_spec.rb

 require 'spec_helper'
 describe Gitlab::Checks::LfsIntegrity do
+  include ProjectForksHelper
   let(:project) { create(:project, :repository) }
   let(:newrev) { '54fcc214b94e78d7a41a9a8fe6d87a5e59500e51' }
@@ -49,5 +50,25 @@ describe Gitlab::Checks::LfsIntegrity do
         expect(subject.objects_missing?).to be_falsey
       end
     end
+
+    context 'for forked project' do
+      let(:parent_project) { create(:project, :repository) }
+      let(:project) { fork_project(parent_project, nil, repository: true) }
+
+      before do
+        allow(project).to receive(:lfs_enabled?).and_return(true)
+      end
+
+      it 'is true parent project is missing LFS objects' do
+        expect(subject.objects_missing?).to be_truthy
+      end
+
+      it 'is false parent project already conatins LFS objects for the fork' do
+        lfs_object = create(:lfs_object, oid: blob_object.lfs_oid)
+        create(:lfs_objects_project, project: parent_project, lfs_object: lfs_object)
+
+        expect(subject.objects_missing?).to be_falsey
+      end
+    end
   end
 end

spec/models/project_spec.rb

@@ -1943,6 +1943,24 @@ describe Project do
         expect(second_fork.fork_source).to eq(project)
       end
     end
+
+    describe '#lfs_storage_project' do
+      it 'returns self for non-forks' do
+        expect(project.lfs_storage_project).to eq project
+      end
+
+      it 'returns the fork network root for forks' do
+        second_fork = fork_project(forked_project)
+
+        expect(second_fork.lfs_storage_project).to eq project
+      end
+
+      it 'returns self when fork_source is nil' do
+        expect(forked_project).to receive(:fork_source).and_return(nil)
+
+        expect(forked_project.lfs_storage_project).to eq forked_project
+      end
+    end
   end
   describe '#pushes_since_gc' do