[ARVADOS] updated: 1.3.0-2688-g60022ad25

Git user git at public.arvados.org
Wed Jun 17 17:57:40 UTC 2020


Summary of changes:
 cmd/arvados-server/cmd.go                          |  24 ++--
 doc/_config.yml                                    |   1 +
 ...overing-deleted-collections.html.textile.liquid |  37 ++++++
 lib/{undelete => recovercollection}/cmd.go         | 139 +++++++++++++++------
 lib/{undelete => recovercollection}/cmd_test.go    |  25 +++-
 services/keepstore/unix_volume.go                  |  14 ++-
 services/keepstore/unix_volume_test.go             |  23 ++++
 7 files changed, 209 insertions(+), 54 deletions(-)
 create mode 100644 doc/admin/recovering-deleted-collections.html.textile.liquid
 rename lib/{undelete => recovercollection}/cmd.go (62%)
 rename lib/{undelete => recovercollection}/cmd_test.go (76%)

  discards  36e3f1ef5944fcb23eb9eda15457d15ce791e34b (commit)
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commit 60022ad25ba8d143578d9f20eda93744688909d2
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Mon Jun 8 10:43:47 2020 -0400

    16007: Migration works with large database
    
    Changing individual permissions on groups that affect a lot of objects
    is expensive.  The migration now suppresses permission updates and
    does a batch update at the end.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/db/migrate/20200602141328_fix_roles_projects.rb b/services/api/db/migrate/20200602141328_fix_roles_projects.rb
index f9b2bd6fa..e17ef6de5 100644
--- a/services/api/db/migrate/20200602141328_fix_roles_projects.rb
+++ b/services/api/db/migrate/20200602141328_fix_roles_projects.rb
@@ -5,9 +5,13 @@
 require 'fix_roles_projects'
 
 class FixRolesProjects < ActiveRecord::Migration[5.0]
-  def change
+  def up
+    # defined in a function for easy testing.
+    fix_roles_projects
+  end
+
+  def down
     # This migration is not reversible.  However, the results are
     # backwards compatible.
-    fix_roles_projects
   end
 end
diff --git a/services/api/db/structure.sql b/services/api/db/structure.sql
index 469475ad9..83987d051 100644
--- a/services/api/db/structure.sql
+++ b/services/api/db/structure.sql
@@ -3196,6 +3196,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20190808145904'),
 ('20190809135453'),
 ('20190905151603'),
-('20200501150153');
+('20200501150153'),
+('20200602141328');
 
 
diff --git a/services/api/lib/fix_roles_projects.rb b/services/api/lib/fix_roles_projects.rb
index dafef61aa..448c50cee 100644
--- a/services/api/lib/fix_roles_projects.rb
+++ b/services/api/lib/fix_roles_projects.rb
@@ -2,23 +2,25 @@
 #
 # SPDX-License-Identifier: AGPL-3.0
 
+include CurrentApiClient
+
 def fix_roles_projects
-  # This migration is not reversible.  However, the behavior it
-  # enforces is backwards-compatible, and most of the time there
-  # shouldn't be anything to do at all.
-  act_as_system_user do
-    ActiveRecord::Base.transaction do
-      q = ActiveRecord::Base.connection.exec_query %{
+  batch_update_permissions do
+    # This migration is not reversible.  However, the behavior it
+    # enforces is backwards-compatible, and most of the time there
+    # shouldn't be anything to do at all.
+    act_as_system_user do
+      ActiveRecord::Base.transaction do
+        q = ActiveRecord::Base.connection.exec_query %{
 select uuid from groups limit 1
 }
 
-      # 1) any group not group_class != project becomes a 'role' (both empty and invalid groups)
-      ActiveRecord::Base.connection.exec_query %{
+        # 1) any group not group_class != project becomes a 'role' (both empty and invalid groups)
+        ActiveRecord::Base.connection.exec_query %{
 UPDATE groups set group_class='role' where group_class != 'project' or group_class is null
     }
 
-      Group.where(group_class: "role").each do |g|
-        if g.owner_uuid != system_user_uuid
+        Group.where("group_class='role' and owner_uuid != '#{system_user_uuid}'").each do |g|
           # 2) Ownership of a role becomes a can_manage link
           Link.create!(link_class: 'permission',
                        name: 'can_manage',
@@ -28,35 +30,46 @@ UPDATE groups set group_class='role' where group_class != 'project' or group_cla
           g.save_with_unique_name!
         end
 
-        # 3) If a role owns anything, give it to system user and it
-        # becomes a can_manage link
         ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |klass|
           next if [ApiClientAuthorization,
                    AuthorizedKey,
-                   Log].include?(klass)
+                   Log,
+                   Group].include?(klass)
           next if !klass.columns.collect(&:name).include?('owner_uuid')
 
-          klass.where(owner_uuid: g.uuid).each do |owned|
+          # 3) If a role owns anything, give it to system user and it
+          # becomes a can_manage link
+          klass.joins("join groups on groups.uuid=#{klass.table_name}.owner_uuid and groups.group_class='role'").each do |owned|
             Link.create!(link_class: 'permission',
                          name: 'can_manage',
-                         tail_uuid: g.uuid,
+                         tail_uuid: owned.owner_uuid,
                          head_uuid: owned.uuid)
             owned.owner_uuid = system_user_uuid
             owned.save_with_unique_name!
           end
         end
-      end
 
-      # 4) Projects can't have outgoing permission links.  Just delete them.
-      q = ActiveRecord::Base.connection.exec_query %{
+        Group.joins("join groups as g2 on g2.uuid=groups.owner_uuid and g2.group_class='role'").each do |owned|
+          Link.create!(link_class: 'permission',
+                       name: 'can_manage',
+                       tail_uuid: owned.owner_uuid,
+                       head_uuid: owned.uuid)
+          owned.owner_uuid = system_user_uuid
+          owned.save_with_unique_name!
+        end
+
+        # 4) Projects can't have outgoing permission links.  Just
+        # print a warning and delete them.
+        q = ActiveRecord::Base.connection.exec_query %{
 select links.uuid from links, groups where groups.uuid = links.tail_uuid and
        links.link_class = 'permission' and groups.group_class = 'project'
 }
-      q.each do |lu|
-        ln = Link.find_by_uuid(lu['uuid'])
-        puts "Projects cannot have outgoing permission links, '#{ln.name}' link from #{ln.tail_uuid} to #{ln.head_uuid} will be removed"
-        Rails.logger.warn "Destroying invalid permission link from project #{ln.tail_uuid} to #{ln.head_uuid}"
-        ln.destroy!
+        q.each do |lu|
+          ln = Link.find_by_uuid(lu['uuid'])
+          puts "WARNING: Projects cannot have outgoing permission links, '#{ln.name}' link from #{ln.tail_uuid} to #{ln.head_uuid} will be removed"
+          Rails.logger.warn "Projects cannot have outgoing permission links, '#{ln.name}' link from #{ln.tail_uuid} to #{ln.head_uuid} will be removed"
+          ln.destroy!
+        end
       end
     end
   end
diff --git a/services/api/lib/update_permissions.rb b/services/api/lib/update_permissions.rb
index 4c2e72d95..7b1b900ca 100644
--- a/services/api/lib/update_permissions.rb
+++ b/services/api/lib/update_permissions.rb
@@ -8,6 +8,8 @@ REVOKE_PERM = 0
 CAN_MANAGE_PERM = 3
 
 def update_permissions perm_origin_uuid, starting_uuid, perm_level, edge_id=nil
+  return if Thread.current[:suppress_update_permissions]
+
   #
   # Update a subset of the permission table affected by adding or
   # removing a particular permission relationship (ownership or a
@@ -140,7 +142,7 @@ end
 
 def check_permissions_against_full_refresh
   # No-op except when running tests
-  return unless Rails.env == 'test' and !Thread.current[:no_check_permissions_against_full_refresh]
+  return unless Rails.env == 'test' and !Thread.current[:no_check_permissions_against_full_refresh] and !Thread.current[:suppress_update_permissions]
 
   # For checking correctness of the incremental permission updates.
   # Check contents of the current 'materialized_permission' table
@@ -191,6 +193,17 @@ def skip_check_permissions_against_full_refresh
   end
 end
 
+def batch_update_permissions
+  check_perm_was = Thread.current[:suppress_update_permissions]
+  Thread.current[:suppress_update_permissions] = true
+  begin
+    yield
+  ensure
+    Thread.current[:suppress_update_permissions] = check_perm_was
+    refresh_permissions
+  end
+end
+
 # Used to account for permissions that a user gains by having
 # can_manage on another user.
 #

commit 2439015112bcf7de6cdfc8170bea9a464db5e616
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Tue Jun 2 16:49:38 2020 -0400

    16007: Fix FUSE test
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/test/fixtures/groups.yml b/services/api/test/fixtures/groups.yml
index e328e9a1b..ee0d786bb 100644
--- a/services/api/test/fixtures/groups.yml
+++ b/services/api/test/fixtures/groups.yml
@@ -9,6 +9,13 @@ public:
   description: Public Project
   group_class: project
 
+public_role:
+  uuid: zzzzz-j7d0g-jt30l961gq3t0oi
+  owner_uuid: zzzzz-tpzed-d9tiejq69daie8f
+  name: Public Role
+  description: Public Role
+  group_class: role
+
 private:
   uuid: zzzzz-j7d0g-rew6elm53kancon
   owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
diff --git a/services/fuse/tests/test_mount.py b/services/fuse/tests/test_mount.py
index 593d945cf..b2816ac16 100644
--- a/services/fuse/tests/test_mount.py
+++ b/services/fuse/tests/test_mount.py
@@ -128,7 +128,7 @@ class FuseMagicTest(MountTestBase):
         super(FuseMagicTest, self).setUp(api=api)
 
         self.test_project = run_test_server.fixture('groups')['aproject']['uuid']
-        self.non_project_group = run_test_server.fixture('groups')['public']['uuid']
+        self.non_project_group = run_test_server.fixture('groups')['public_role']['uuid']
         self.collection_in_test_project = run_test_server.fixture('collections')['foo_collection_in_aproject']['name']
 
         cw = arvados.CollectionWriter()

commit 27f3423ab974547d8ff666e7d9f9af7aec933765
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Tue Jun 2 16:45:21 2020 -0400

    16007: Add migration to fix invalid groups & permission links
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/db/migrate/20200602141328_fix_roles_projects.rb b/services/api/db/migrate/20200602141328_fix_roles_projects.rb
new file mode 100644
index 000000000..f9b2bd6fa
--- /dev/null
+++ b/services/api/db/migrate/20200602141328_fix_roles_projects.rb
@@ -0,0 +1,13 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+require 'fix_roles_projects'
+
+class FixRolesProjects < ActiveRecord::Migration[5.0]
+  def change
+    # This migration is not reversible.  However, the results are
+    # backwards compatible.
+    fix_roles_projects
+  end
+end
diff --git a/services/api/lib/fix_roles_projects.rb b/services/api/lib/fix_roles_projects.rb
new file mode 100644
index 000000000..dafef61aa
--- /dev/null
+++ b/services/api/lib/fix_roles_projects.rb
@@ -0,0 +1,63 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+def fix_roles_projects
+  # This migration is not reversible.  However, the behavior it
+  # enforces is backwards-compatible, and most of the time there
+  # shouldn't be anything to do at all.
+  act_as_system_user do
+    ActiveRecord::Base.transaction do
+      q = ActiveRecord::Base.connection.exec_query %{
+select uuid from groups limit 1
+}
+
+      # 1) any group not group_class != project becomes a 'role' (both empty and invalid groups)
+      ActiveRecord::Base.connection.exec_query %{
+UPDATE groups set group_class='role' where group_class != 'project' or group_class is null
+    }
+
+      Group.where(group_class: "role").each do |g|
+        if g.owner_uuid != system_user_uuid
+          # 2) Ownership of a role becomes a can_manage link
+          Link.create!(link_class: 'permission',
+                       name: 'can_manage',
+                       tail_uuid: g.owner_uuid,
+                       head_uuid: g.uuid)
+          g.owner_uuid = system_user_uuid
+          g.save_with_unique_name!
+        end
+
+        # 3) If a role owns anything, give it to system user and it
+        # becomes a can_manage link
+        ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |klass|
+          next if [ApiClientAuthorization,
+                   AuthorizedKey,
+                   Log].include?(klass)
+          next if !klass.columns.collect(&:name).include?('owner_uuid')
+
+          klass.where(owner_uuid: g.uuid).each do |owned|
+            Link.create!(link_class: 'permission',
+                         name: 'can_manage',
+                         tail_uuid: g.uuid,
+                         head_uuid: owned.uuid)
+            owned.owner_uuid = system_user_uuid
+            owned.save_with_unique_name!
+          end
+        end
+      end
+
+      # 4) Projects can't have outgoing permission links.  Just delete them.
+      q = ActiveRecord::Base.connection.exec_query %{
+select links.uuid from links, groups where groups.uuid = links.tail_uuid and
+       links.link_class = 'permission' and groups.group_class = 'project'
+}
+      q.each do |lu|
+        ln = Link.find_by_uuid(lu['uuid'])
+        puts "Projects cannot have outgoing permission links, '#{ln.name}' link from #{ln.tail_uuid} to #{ln.head_uuid} will be removed"
+        Rails.logger.warn "Destroying invalid permission link from project #{ln.tail_uuid} to #{ln.head_uuid}"
+        ln.destroy!
+      end
+    end
+  end
+end
diff --git a/services/api/test/fixtures/links.yml b/services/api/test/fixtures/links.yml
index 4293b0466..b30d1edc2 100644
--- a/services/api/test/fixtures/links.yml
+++ b/services/api/test/fixtures/links.yml
@@ -198,20 +198,6 @@ foo_file_readable_by_active_redundant_permission_via_private_group:
   head_uuid: zzzzz-4zz18-znfnqtbbv4spc3w
   properties: {}
 
-foo_file_readable_by_aproject:
-  uuid: zzzzz-o0j2j-fp1d8395ldqw22p
-  owner_uuid: zzzzz-tpzed-000000000000000
-  created_at: 2014-01-24 20:42:26 -0800
-  modified_by_client_uuid: zzzzz-ozdt8-brczlopd8u8d0jr
-  modified_by_user_uuid: zzzzz-tpzed-000000000000000
-  modified_at: 2014-01-24 20:42:26 -0800
-  updated_at: 2014-01-24 20:42:26 -0800
-  tail_uuid: zzzzz-j7d0g-v955i6s2oi1cbso
-  link_class: permission
-  name: can_read
-  head_uuid: zzzzz-4zz18-znfnqtbbv4spc3w
-  properties: {}
-
 bar_file_readable_by_active:
   uuid: zzzzz-o0j2j-8hppiuduf8eqdng
   owner_uuid: zzzzz-tpzed-000000000000000
diff --git a/services/api/test/unit/group_test.rb b/services/api/test/unit/group_test.rb
index 631e0137c..3d1fda927 100644
--- a/services/api/test/unit/group_test.rb
+++ b/services/api/test/unit/group_test.rb
@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0
 
 require 'test_helper'
+require 'fix_roles_projects'
 
 class GroupTest < ActiveSupport::TestCase
 
@@ -293,4 +294,53 @@ class GroupTest < ActiveSupport::TestCase
       end
     end
   end
+
+  def insert_group uuid, owner_uuid, name, group_class
+    q = ActiveRecord::Base.connection.exec_query %{
+insert into groups (uuid, owner_uuid, name, group_class, created_at, updated_at)
+       values ('#{uuid}', '#{owner_uuid}',
+               '#{name}', #{if group_class then "'"+group_class+"'" else 'NULL' end},
+               statement_timestamp(), statement_timestamp())
+}
+    uuid
+  end
+
+  test "migration to fix roles and projects" do
+    g1 = insert_group Group.generate_uuid, system_user_uuid, 'group with no class', nil
+    g2 = insert_group Group.generate_uuid, users(:active).uuid, 'role owned by a user', 'role'
+
+    g3 = insert_group Group.generate_uuid, system_user_uuid, 'role that owns a project', 'role'
+    g4 = insert_group Group.generate_uuid, g3, 'the project', 'project'
+
+    g5 = insert_group Group.generate_uuid, users(:active).uuid, 'a project with an outgoing permission link', 'project'
+
+    g6 = insert_group Group.generate_uuid, system_user_uuid, 'name collision', 'role'
+    g7 = insert_group Group.generate_uuid, users(:active).uuid, 'name collision', 'role'
+
+    refresh_permissions
+
+    act_as_system_user do
+      l1 = Link.create!(link_class: 'permission', name: 'can_manage', tail_uuid: g3, head_uuid: g4)
+      q = ActiveRecord::Base.connection.exec_query %{
+update links set tail_uuid='#{g5}' where uuid='#{l1.uuid}'
+}
+    refresh_permissions
+    end
+
+    assert_equal nil, Group.find_by_uuid(g1).group_class
+    assert_equal users(:active).uuid, Group.find_by_uuid(g2).owner_uuid
+    assert_equal g3, Group.find_by_uuid(g4).owner_uuid
+    assert !Link.where(tail_uuid: users(:active).uuid, head_uuid: g2, link_class: "permission", name: "can_manage").any?
+    assert !Link.where(tail_uuid: g3, head_uuid: g4, link_class: "permission", name: "can_manage").any?
+    assert Link.where(link_class: 'permission', name: 'can_manage', tail_uuid: g5, head_uuid: g4).any?
+
+    fix_roles_projects
+
+    assert_equal 'role', Group.find_by_uuid(g1).group_class
+    assert_equal system_user_uuid, Group.find_by_uuid(g2).owner_uuid
+    assert_equal system_user_uuid, Group.find_by_uuid(g4).owner_uuid
+    assert Link.where(tail_uuid: users(:active).uuid, head_uuid: g2, link_class: "permission", name: "can_manage").any?
+    assert Link.where(tail_uuid: g3, head_uuid: g4, link_class: "permission", name: "can_manage").any?
+    assert !Link.where(link_class: 'permission', name: 'can_manage', tail_uuid: g5, head_uuid: g4).any?
+  end
 end

commit 24b1ca4bf401b6701055ad0df4160a9fc1aacd7b
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Tue Jun 2 13:26:48 2020 -0400

    16007: Reenable updating the permission level of a link
    
    Add test to ensure permission table is synchronized when updating the
    level of an existing permission link.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/apps/workbench/test/integration/projects_test.rb b/apps/workbench/test/integration/projects_test.rb
index 17ab5e466..7a5103007 100644
--- a/apps/workbench/test/integration/projects_test.rb
+++ b/apps/workbench/test/integration/projects_test.rb
@@ -132,7 +132,7 @@ class ProjectsTest < ActionDispatch::IntegrationTest
     show_object_using('active', 'groups', 'aproject', 'A Project')
     click_on "Sharing"
     click_on "Share with groups"
-    good_uuid = api_fixture("groups")["private"]["uuid"]
+    good_uuid = api_fixture("groups")["future_project_viewing_group"]["uuid"]
     assert(page.has_selector?(".selectable[data-object-uuid=\"#{good_uuid}\"]"),
            "'share with groups' listing missing owned user group")
     bad_uuid = api_fixture("groups")["asubproject"]["uuid"]
diff --git a/services/api/app/models/link.rb b/services/api/app/models/link.rb
index 0b7205612..60a94c7e2 100644
--- a/services/api/app/models/link.rb
+++ b/services/api/app/models/link.rb
@@ -13,7 +13,7 @@ class Link < ArvadosModel
 
   validate :name_links_are_obsolete
   validate :permission_to_attach_to_objects
-  before_update :cannot_alter_permissions
+  before_update :restrict_alter_permissions
   after_update :call_update_permissions
   after_create :call_update_permissions
   before_destroy :clear_permissions
@@ -50,6 +50,11 @@ class Link < ArvadosModel
     # All users can write links that don't affect permissions
     return true if self.link_class != 'permission'
 
+    if PERM_LEVEL[self.name].nil?
+      errors.add(:name, "is invalid permission, must be one of 'can_read', 'can_write', 'can_manage', 'can_login'")
+      return false
+    end
+
     rsc_class = ArvadosModel::resource_class_for_uuid tail_uuid
     if rsc_class == Group
       tail_obj = Group.find_by_uuid(tail_uuid)
@@ -84,13 +89,13 @@ class Link < ArvadosModel
     false
   end
 
-  def cannot_alter_permissions
+  def restrict_alter_permissions
     return true if self.link_class != 'permission' && self.link_class_was != 'permission'
 
     return true if current_user.andand.uuid == system_user.uuid
 
-    if link_class_changed? || name_changed? || tail_uuid_changed? || head_uuid_changed?
-      raise "Cannot alter a permission link"
+    if link_class_changed? || tail_uuid_changed? || head_uuid_changed?
+      raise "Can only alter permission link level"
     end
   end
 
diff --git a/services/api/test/unit/permission_test.rb b/services/api/test/unit/permission_test.rb
index 03a8e82ee..07709b752 100644
--- a/services/api/test/unit/permission_test.rb
+++ b/services/api/test/unit/permission_test.rb
@@ -46,7 +46,7 @@ class PermissionTest < ActiveSupport::TestCase
   end
 
   test "readable_by" do
-    set_user_from_auth :active_trustedclient
+    set_user_from_auth :admin
 
     ob = Collection.create!
     Link.create!(tail_uuid: users(:active).uuid,
@@ -57,7 +57,7 @@ class PermissionTest < ActiveSupport::TestCase
   end
 
   test "writable_by" do
-    set_user_from_auth :active_trustedclient
+    set_user_from_auth :admin
 
     ob = Collection.create!
     Link.create!(tail_uuid: users(:active).uuid,

commit 98c6516b3dd61db66c8f92345b45df33c4530a67
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Tue Jun 2 10:09:29 2020 -0400

    16007: Update group-sync tool for new restrictions on roles
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/test/fixtures/links.yml b/services/api/test/fixtures/links.yml
index 2f6643337..4293b0466 100644
--- a/services/api/test/fixtures/links.yml
+++ b/services/api/test/fixtures/links.yml
@@ -1111,3 +1111,17 @@ tagged_collection_readable_by_spectator:
   name: can_read
   head_uuid: zzzzz-4zz18-taggedcolletion
   properties: {}
+
+active_manages_viewing_group:
+  uuid: zzzzz-o0j2j-activemanagesvi
+  owner_uuid: zzzzz-tpzed-000000000000000
+  created_at: 2014-01-24 20:42:26 -0800
+  modified_by_client_uuid: zzzzz-ozdt8-brczlopd8u8d0jr
+  modified_by_user_uuid: zzzzz-tpzed-000000000000000
+  modified_at: 2014-01-24 20:42:26 -0800
+  updated_at: 2014-01-24 20:42:26 -0800
+  tail_uuid: zzzzz-tpzed-xurymjxw79nv3jz
+  link_class: permission
+  name: can_manage
+  head_uuid: zzzzz-j7d0g-futrprojviewgrp
+  properties: {}
diff --git a/tools/sync-groups/sync-groups.go b/tools/sync-groups/sync-groups.go
index 9e2307b7a..4d03ba89e 100644
--- a/tools/sync-groups/sync-groups.go
+++ b/tools/sync-groups/sync-groups.go
@@ -226,8 +226,9 @@ func SetParentGroup(cfg *ConfigParams) error {
 				log.Println("Default parent group not found, creating...")
 			}
 			groupData := map[string]string{
-				"name":       cfg.ParentGroupName,
-				"owner_uuid": cfg.SysUserUUID,
+				"name":        cfg.ParentGroupName,
+				"owner_uuid":  cfg.SysUserUUID,
+				"group_class": "role",
 			}
 			if err := CreateGroup(cfg, &parentGroup, groupData); err != nil {
 				return fmt.Errorf("error creating system user owned group named %q: %s", groupData["name"], err)
@@ -528,17 +529,21 @@ func GetRemoteGroups(cfg *ConfigParams, allUsers map[string]arvados.User) (remot
 
 	params := arvados.ResourceListParams{
 		Filters: []arvados.Filter{{
-			Attr:     "owner_uuid",
+			Attr:     "tail_uuid",
 			Operator: "=",
 			Operand:  cfg.ParentGroupUUID,
 		}},
 	}
-	results, err := GetAll(cfg.Client, "groups", params, &GroupList{})
+	results, err := GetAll(cfg.Client, "links", params, &LinkList{})
 	if err != nil {
 		return remoteGroups, groupNameToUUID, fmt.Errorf("error getting remote groups: %s", err)
 	}
 	for _, item := range results {
-		group := item.(arvados.Group)
+		var group arvados.Group
+		err = GetGroup(cfg, &group, item.(arvados.Link).HeadUUID)
+		if err != nil {
+			return remoteGroups, groupNameToUUID, fmt.Errorf("error getting remote group: %s", err)
+		}
 		// Group -> User filter
 		g2uFilter := arvados.ResourceListParams{
 			Filters: []arvados.Filter{{
diff --git a/tools/sync-groups/sync-groups_test.go b/tools/sync-groups/sync-groups_test.go
index 9eec6b6d9..2da8c1cdd 100644
--- a/tools/sync-groups/sync-groups_test.go
+++ b/tools/sync-groups/sync-groups_test.go
@@ -170,7 +170,7 @@ func RemoteGroupExists(cfg *ConfigParams, groupName string) (uuid string, err er
 		}, {
 			Attr:     "owner_uuid",
 			Operator: "=",
-			Operand:  cfg.ParentGroupUUID,
+			Operand:  cfg.SysUserUUID,
 		}, {
 			Attr:     "group_class",
 			Operator: "=",

commit aa31e2b5647e86db79c6fd86bb98a922953afb13
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Mon Jun 1 18:03:56 2020 -0400

    16007: Roles are owned by system user
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/app/models/group.rb b/services/api/app/models/group.rb
index e16433c81..21e57e143 100644
--- a/services/api/app/models/group.rb
+++ b/services/api/app/models/group.rb
@@ -25,6 +25,8 @@ class Group < ArvadosModel
   before_update :before_ownership_change
   after_update :after_ownership_change
 
+  after_create :add_role_manage_link
+
   after_update :update_trash
   before_destroy :clear_permissions_and_trash
 
@@ -114,4 +116,33 @@ delete from trashed_groups where group_uuid=$1
     end
     true
   end
+
+  def ensure_owner_uuid_is_permitted
+    if group_class == "role"
+      @role_creator = nil
+      if new_record?
+        @role_creator = owner_uuid
+        self.owner_uuid = system_user_uuid
+        return true
+      end
+      if self.owner_uuid != system_user_uuid
+        raise "Owner uuid for role must be system user"
+      end
+      raise PermissionDeniedError unless current_user.can?(manage: uuid)
+      true
+    else
+      super
+    end
+  end
+
+  def add_role_manage_link
+    if group_class == "role" && @role_creator
+      act_as_system_user do
+       Link.create!(tail_uuid: @role_creator,
+                    head_uuid: self.uuid,
+                    link_class: "permission",
+                    name: "can_manage")
+      end
+    end
+  end
 end
diff --git a/services/api/test/fixtures/groups.yml b/services/api/test/fixtures/groups.yml
index a64970e60..e328e9a1b 100644
--- a/services/api/test/fixtures/groups.yml
+++ b/services/api/test/fixtures/groups.yml
@@ -18,14 +18,14 @@ private:
 
 private_role:
   uuid: zzzzz-j7d0g-pew6elm53kancon
-  owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
+  owner_uuid: zzzzz-tpzed-000000000000000
   name: Private Role
   description: Private Role
   group_class: role
 
 private_and_can_read_foofile:
   uuid: zzzzz-j7d0g-22xp1wpjul508rk
-  owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
+  owner_uuid: zzzzz-tpzed-000000000000000
   name: Private and Can Read Foofile
   description: Another Private Group
   group_class: role
@@ -95,7 +95,7 @@ asubproject:
 
 future_project_viewing_group:
   uuid: zzzzz-j7d0g-futrprojviewgrp
-  owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
+  owner_uuid: zzzzz-tpzed-000000000000000
   created_at: 2014-04-21 15:37:48 -0400
   modified_by_client_uuid: zzzzz-ozdt8-brczlopd8u8d0jr
   modified_by_user_uuid: zzzzz-tpzed-xurymjxw79nv3jz

commit 2627f837f2564de2708947dda87f1b4985580adb
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Mon Jun 1 14:59:51 2020 -0400

    16007: Only users and roles can be granted permission
    
    Permission link tail_uuid must be a user or group_class role.
    
    Also disallow modifying permission links.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/app/models/arvados_model.rb b/services/api/app/models/arvados_model.rb
index 7270f7cdf..01a31adb9 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -585,7 +585,7 @@ class ArvadosModel < ApplicationRecord
       # itself.
       if !current_user.can?(write: self.uuid)
         logger.warn "User #{current_user.uuid} tried to modify #{self.class.to_s} #{self.uuid} without write permission"
-        errors.add :uuid, "is not writable"
+        errors.add :uuid, " #{uuid} is not writable by #{current_user.uuid}"
         raise PermissionDeniedError
       end
     end
diff --git a/services/api/app/models/link.rb b/services/api/app/models/link.rb
index 21d89767c..0b7205612 100644
--- a/services/api/app/models/link.rb
+++ b/services/api/app/models/link.rb
@@ -12,8 +12,8 @@ class Link < ArvadosModel
   attribute :properties, :jsonbHash, default: {}
 
   validate :name_links_are_obsolete
-  before_create :permission_to_attach_to_objects
-  before_update :permission_to_attach_to_objects
+  validate :permission_to_attach_to_objects
+  before_update :cannot_alter_permissions
   after_update :call_update_permissions
   after_create :call_update_permissions
   before_destroy :clear_permissions
@@ -50,13 +50,32 @@ class Link < ArvadosModel
     # All users can write links that don't affect permissions
     return true if self.link_class != 'permission'
 
+    rsc_class = ArvadosModel::resource_class_for_uuid tail_uuid
+    if rsc_class == Group
+      tail_obj = Group.find_by_uuid(tail_uuid)
+      if tail_obj.nil?
+        errors.add(:tail_uuid, "does not exist")
+        return false
+      end
+      if tail_obj.group_class != "role"
+        errors.add(:tail_uuid, "must be a role, was #{tail_obj.group_class}")
+        return false
+      end
+    elsif rsc_class != User
+      errors.add(:tail_uuid, "must be a user or role")
+      return false
+    end
+
     # Administrators can grant permissions
     return true if current_user.is_admin
 
     head_obj = ArvadosModel.find_by_uuid(head_uuid)
 
     # No permission links can be pointed to past collection versions
-    return false if head_obj.is_a?(Collection) && head_obj.current_version_uuid != head_uuid
+    if head_obj.is_a?(Collection) && head_obj.current_version_uuid != head_uuid
+      errors.add(:head_uuid, "cannot point to a past version of a collection")
+      return false
+    end
 
     # All users can grant permissions on objects they own or can manage
     return true if current_user.can?(manage: head_obj)
@@ -65,6 +84,16 @@ class Link < ArvadosModel
     false
   end
 
+  def cannot_alter_permissions
+    return true if self.link_class != 'permission' && self.link_class_was != 'permission'
+
+    return true if current_user.andand.uuid == system_user.uuid
+
+    if link_class_changed? || name_changed? || tail_uuid_changed? || head_uuid_changed?
+      raise "Cannot alter a permission link"
+    end
+  end
+
   PERM_LEVEL = {
     'can_read' => 1,
     'can_login' => 1,
diff --git a/services/api/test/fixtures/groups.yml b/services/api/test/fixtures/groups.yml
index 89235d65b..a64970e60 100644
--- a/services/api/test/fixtures/groups.yml
+++ b/services/api/test/fixtures/groups.yml
@@ -16,6 +16,13 @@ private:
   description: Private Project
   group_class: project
 
+private_role:
+  uuid: zzzzz-j7d0g-pew6elm53kancon
+  owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
+  name: Private Role
+  description: Private Role
+  group_class: role
+
 private_and_can_read_foofile:
   uuid: zzzzz-j7d0g-22xp1wpjul508rk
   owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
diff --git a/services/api/test/integration/permissions_test.rb b/services/api/test/integration/permissions_test.rb
index ff33fe65b..66a62543b 100644
--- a/services/api/test/integration/permissions_test.rb
+++ b/services/api/test/integration/permissions_test.rb
@@ -87,7 +87,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
           tail_uuid: users(:spectator).uuid,
           link_class: 'permission',
           name: 'can_read',
-          head_uuid: groups(:private).uuid,
+          head_uuid: groups(:private_role).uuid,
           properties: {}
         }
       },
@@ -105,7 +105,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
       params: {
         :format => :json,
         :link => {
-          tail_uuid: groups(:private).uuid,
+          tail_uuid: groups(:private_role).uuid,
           link_class: 'permission',
           name: 'can_read',
           head_uuid: collections(:foo_file).uuid,
@@ -149,7 +149,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
       params: {
         :format => :json,
         :link => {
-          tail_uuid: groups(:private).uuid,
+          tail_uuid: groups(:private_role).uuid,
           link_class: 'permission',
           name: 'can_read',
           head_uuid: collections(:foo_file).uuid,
@@ -173,7 +173,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
           tail_uuid: users(:spectator).uuid,
           link_class: 'permission',
           name: 'can_read',
-          head_uuid: groups(:private).uuid,
+          head_uuid: groups(:private_role).uuid,
           properties: {}
         }
       },
@@ -216,7 +216,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
           tail_uuid: users(:spectator).uuid,
           link_class: 'permission',
           name: 'can_read',
-          head_uuid: groups(:private).uuid,
+          head_uuid: groups(:private_role).uuid,
           properties: {}
         }
       },
@@ -228,7 +228,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
       params: {
         :format => :json,
         :link => {
-          tail_uuid: groups(:private).uuid,
+          tail_uuid: groups(:private_role).uuid,
           link_class: 'permission',
           name: 'can_read',
           head_uuid: groups(:empty_lonely_group).uuid,
diff --git a/services/api/test/unit/group_test.rb b/services/api/test/unit/group_test.rb
index e34c1a44f..631e0137c 100644
--- a/services/api/test/unit/group_test.rb
+++ b/services/api/test/unit/group_test.rb
@@ -205,7 +205,7 @@ class GroupTest < ActiveSupport::TestCase
   test "trashed does not propagate across permission links" do
     set_user_from_auth :admin
 
-    g_foo = Group.create!(name: "foo", group_class: "project")
+    g_foo = Group.create!(name: "foo", group_class: "role")
     u_bar = User.create!(first_name: "bar")
 
     assert Group.readable_by(users(:admin)).where(uuid: g_foo.uuid).any?
diff --git a/services/api/test/unit/permission_test.rb b/services/api/test/unit/permission_test.rb
index 4849b385b..03a8e82ee 100644
--- a/services/api/test/unit/permission_test.rb
+++ b/services/api/test/unit/permission_test.rb
@@ -423,8 +423,14 @@ class PermissionTest < ActiveSupport::TestCase
 
   test "add user to group, then remove them" do
     set_user_from_auth :admin
-    grp = Group.create!(owner_uuid: system_user_uuid, group_class: "project")
-    col = Collection.create!(owner_uuid: grp.uuid)
+    grp = Group.create!(owner_uuid: system_user_uuid, group_class: "role")
+    col = Collection.create!(owner_uuid: system_user_uuid)
+
+    l0 = Link.create!(tail_uuid: grp.uuid,
+                 head_uuid: col.uuid,
+                 link_class: 'permission',
+                 name: 'can_read')
+
     assert_empty Collection.readable_by(users(:active)).where(uuid: col.uuid)
     assert_empty User.readable_by(users(:active)).where(uuid: users(:project_viewer).uuid)
 

commit 17745128f72eeaef62ea2d367ec316502107f272
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Fri May 29 17:25:05 2020 -0400

    16007: Make it so that only projects can own things
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/app/models/arvados_model.rb b/services/api/app/models/arvados_model.rb
index 8afebfb79..7270f7cdf 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -574,6 +574,9 @@ class ArvadosModel < ApplicationRecord
           logger.warn "User #{current_user.uuid} tried to set ownership of #{self.class.to_s} #{self.uuid} but does not have permission to write #{which} owner_uuid #{check_uuid}"
           errors.add :owner_uuid, "cannot be set or changed without write permission on #{which} owner"
           raise PermissionDeniedError
+        elsif rsc_class == Group && Group.find_by_uuid(owner_uuid).group_class != "project"
+          errors.add :owner_uuid, "must be a project"
+          raise PermissionDeniedError
         end
       end
     else
diff --git a/services/api/app/models/database_seeds.rb b/services/api/app/models/database_seeds.rb
index 39f491503..a86a2c854 100644
--- a/services/api/app/models/database_seeds.rb
+++ b/services/api/app/models/database_seeds.rb
@@ -13,7 +13,6 @@ class DatabaseSeeds
     anonymous_group
     anonymous_group_read_permission
     anonymous_user
-    empty_collection
     refresh_permissions
     refresh_trashed
   end
diff --git a/services/api/app/models/group.rb b/services/api/app/models/group.rb
index d6fc818cd..e16433c81 100644
--- a/services/api/app/models/group.rb
+++ b/services/api/app/models/group.rb
@@ -49,6 +49,9 @@ class Group < ArvadosModel
     if group_class != 'project' && group_class != 'role'
       errors.add :group_class, "value must be one of 'project' or 'role', was '#{group_class}'"
     end
+    if group_class_changed? && !group_class_was.nil?
+      errors.add :group_class, "cannot be modified after record is created"
+    end
   end
 
   def update_trash
diff --git a/services/api/lib/current_api_client.rb b/services/api/lib/current_api_client.rb
index c7b48c0cd..f3ec0a03e 100644
--- a/services/api/lib/current_api_client.rb
+++ b/services/api/lib/current_api_client.rb
@@ -8,7 +8,6 @@ $all_users_group = nil
 $anonymous_user = nil
 $anonymous_group = nil
 $anonymous_group_read_permission = nil
-$empty_collection = nil
 
 module CurrentApiClient
   def current_user
@@ -90,7 +89,8 @@ module CurrentApiClient
         ActiveRecord::Base.transaction do
           Group.where(uuid: system_group_uuid).
             first_or_create!(name: "System group",
-                             description: "System group") do |g|
+                             description: "System group",
+                             group_class: "role") do |g|
             g.save!
             User.all.collect(&:uuid).each do |user_uuid|
               Link.create!(link_class: 'permission',
@@ -188,22 +188,10 @@ module CurrentApiClient
     end
   end
 
-  def empty_collection_uuid
+  def empty_collection_pdh
     'd41d8cd98f00b204e9800998ecf8427e+0'
   end
 
-  def empty_collection
-    $empty_collection = check_cache $empty_collection do
-      act_as_system_user do
-        ActiveRecord::Base.transaction do
-          Collection.
-            where(portable_data_hash: empty_collection_uuid).
-            first_or_create!(manifest_text: '', owner_uuid: anonymous_group.uuid)
-        end
-      end
-    end
-  end
-
   private
 
   # If the given value is nil, or the cache has been cleared since it
diff --git a/services/api/test/fixtures/groups.yml b/services/api/test/fixtures/groups.yml
index 68377eb5f..89235d65b 100644
--- a/services/api/test/fixtures/groups.yml
+++ b/services/api/test/fixtures/groups.yml
@@ -6,15 +6,15 @@ public:
   uuid: zzzzz-j7d0g-it30l961gq3t0oi
   owner_uuid: zzzzz-tpzed-d9tiejq69daie8f
   name: Public
-  description: Public Group
-  group_class: role
+  description: Public Project
+  group_class: project
 
 private:
   uuid: zzzzz-j7d0g-rew6elm53kancon
   owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
   name: Private
-  description: Private Group
-  group_class: role
+  description: Private Project
+  group_class: project
 
 private_and_can_read_foofile:
   uuid: zzzzz-j7d0g-22xp1wpjul508rk
@@ -248,17 +248,6 @@ fuse_owned_project:
   description: Test project belonging to FUSE test user
   group_class: project
 
-group_with_no_class:
-  uuid: zzzzz-j7d0g-groupwithnoclas
-  owner_uuid: zzzzz-tpzed-xurymjxw79nv3jz
-  created_at: 2014-04-21 15:37:48 -0400
-  modified_by_client_uuid: zzzzz-ozdt8-brczlopd8u8d0jr
-  modified_by_user_uuid: zzzzz-tpzed-xurymjxw79nv3jz
-  modified_at: 2014-04-21 15:37:48 -0400
-  updated_at: 2014-04-21 15:37:48 -0400
-  name: group_with_no_class
-  description: This group has no class at all. So rude!
-
 # This wouldn't pass model validation, but it enables a workbench
 # infinite-loop test. See #4389
 project_owns_itself:
diff --git a/services/api/test/functional/arvados/v1/filters_test.rb b/services/api/test/functional/arvados/v1/filters_test.rb
index b30afd745..26270b1c3 100644
--- a/services/api/test/functional/arvados/v1/filters_test.rb
+++ b/services/api/test/functional/arvados/v1/filters_test.rb
@@ -6,16 +6,16 @@ require 'test_helper'
 
 class Arvados::V1::FiltersTest < ActionController::TestCase
   test '"not in" filter passes null values' do
-    @controller = Arvados::V1::GroupsController.new
+    @controller = Arvados::V1::ContainerRequestsController.new
     authorize_with :admin
     get :index, params: {
-      filters: [ ['group_class', 'not in', ['project']] ],
-      controller: 'groups',
+      filters: [ ['container_uuid', 'not in', ['zzzzz-dz642-queuedcontainer', 'zzzzz-dz642-runningcontainr']] ],
+      controller: 'container_requests',
     }
     assert_response :success
     found = assigns(:objects)
-    assert_includes(found.collect(&:group_class), nil,
-                    "'group_class not in ['project']' filter should pass null")
+    assert_includes(found.collect(&:container_uuid), nil,
+                    "'container_uuid not in [zzzzz-dz642-queuedcontainer, zzzzz-dz642-runningcontainr]' filter should pass null")
   end
 
   test 'error message for non-array element in filters array' do
diff --git a/services/api/test/functional/arvados/v1/groups_controller_test.rb b/services/api/test/functional/arvados/v1/groups_controller_test.rb
index 2b5e8d5a9..ff89cd212 100644
--- a/services/api/test/functional/arvados/v1/groups_controller_test.rb
+++ b/services/api/test/functional/arvados/v1/groups_controller_test.rb
@@ -29,8 +29,9 @@ class Arvados::V1::GroupsControllerTest < ActionController::TestCase
     end
     assert_includes group_uuids, groups(:aproject).uuid
     assert_includes group_uuids, groups(:asubproject).uuid
+    assert_includes group_uuids, groups(:private).uuid
     assert_not_includes group_uuids, groups(:system_group).uuid
-    assert_not_includes group_uuids, groups(:private).uuid
+    assert_not_includes group_uuids, groups(:private_and_can_read_foofile).uuid
   end
 
   test "get list of groups that are not projects" do
@@ -44,8 +45,6 @@ class Arvados::V1::GroupsControllerTest < ActionController::TestCase
     end
     assert_not_includes group_uuids, groups(:aproject).uuid
     assert_not_includes group_uuids, groups(:asubproject).uuid
-    assert_includes group_uuids, groups(:private).uuid
-    assert_includes group_uuids, groups(:group_with_no_class).uuid
   end
 
   test "get list of groups with bogus group_class" do
@@ -746,20 +745,23 @@ class Arvados::V1::GroupsControllerTest < ActionController::TestCase
     assert_equal 0, json_response['included'].length
   end
 
-  test 'get shared, owned by non-project' do
+  test 'get shared, add permission link' do
     authorize_with :user_bar_in_sharing_group
 
     act_as_system_user do
-      Group.find_by_uuid(groups(:project_owned_by_foo).uuid).update!(owner_uuid: groups(:group_for_sharing_tests).uuid)
+      Link.create!(tail_uuid: groups(:group_for_sharing_tests).uuid,
+                   head_uuid: groups(:project_owned_by_foo).uuid,
+                   link_class: 'permission',
+                   name: 'can_manage')
     end
 
     get :shared, params: {:filters => [["group_class", "=", "project"]], :include => "owner_uuid"}
 
     assert_equal 1, json_response['items'].length
-    assert_equal json_response['items'][0]["uuid"], groups(:project_owned_by_foo).uuid
+    assert_equal groups(:project_owned_by_foo).uuid, json_response['items'][0]["uuid"]
 
     assert_equal 1, json_response['included'].length
-    assert_equal json_response['included'][0]["uuid"], groups(:group_for_sharing_tests).uuid
+    assert_equal users(:user_foo_in_sharing_group).uuid, json_response['included'][0]["uuid"]
   end
 
   ### contents with exclude_home_project
@@ -810,20 +812,23 @@ class Arvados::V1::GroupsControllerTest < ActionController::TestCase
     assert_equal 0, json_response['included'].length
   end
 
-  test 'contents, exclude home, owned by non-project' do
+  test 'contents, exclude home, add permission link' do
     authorize_with :user_bar_in_sharing_group
 
     act_as_system_user do
-      Group.find_by_uuid(groups(:project_owned_by_foo).uuid).update!(owner_uuid: groups(:group_for_sharing_tests).uuid)
+      Link.create!(tail_uuid: groups(:group_for_sharing_tests).uuid,
+                   head_uuid: groups(:project_owned_by_foo).uuid,
+                   link_class: 'permission',
+                   name: 'can_manage')
     end
 
     get :contents, params: {:include => "owner_uuid", :exclude_home_project => true}
 
     assert_equal 1, json_response['items'].length
-    assert_equal json_response['items'][0]["uuid"], groups(:project_owned_by_foo).uuid
+    assert_equal groups(:project_owned_by_foo).uuid, json_response['items'][0]["uuid"]
 
     assert_equal 1, json_response['included'].length
-    assert_equal json_response['included'][0]["uuid"], groups(:group_for_sharing_tests).uuid
+    assert_equal users(:user_foo_in_sharing_group).uuid, json_response['included'][0]["uuid"]
   end
 
   test 'contents, exclude home, with parent specified' do
diff --git a/services/api/test/integration/permissions_test.rb b/services/api/test/integration/permissions_test.rb
index eec41aa08..ff33fe65b 100644
--- a/services/api/test/integration/permissions_test.rb
+++ b/services/api/test/integration/permissions_test.rb
@@ -6,7 +6,6 @@ require 'test_helper'
 
 class PermissionsTest < ActionDispatch::IntegrationTest
   include DbCurrentTime
-  include CurrentApiClient  # for empty_collection
   fixtures :users, :groups, :api_client_authorizations, :collections
 
   test "adding and removing direct can_read links" do
@@ -441,7 +440,7 @@ class PermissionsTest < ActionDispatch::IntegrationTest
   test "active user can read the empty collection" do
     # The active user should be able to read the empty collection.
 
-    get("/arvados/v1/collections/#{empty_collection_uuid}",
+    get("/arvados/v1/collections/#{empty_collection_pdh}",
       params: {:format => :json},
       headers: auth(:active))
     assert_response :success
diff --git a/services/api/test/unit/group_test.rb b/services/api/test/unit/group_test.rb
index f7a531fc0..e34c1a44f 100644
--- a/services/api/test/unit/group_test.rb
+++ b/services/api/test/unit/group_test.rb
@@ -60,6 +60,43 @@ class GroupTest < ActiveSupport::TestCase
     assert g_foo.errors.messages[:owner_uuid].join(" ").match(/ownership cycle/)
   end
 
+  test "cannot create a group that is not a 'role' or 'project'" do
+    set_user_from_auth :active_trustedclient
+
+    assert_raises(ActiveRecord::RecordInvalid) do
+      Group.create!(name: "foo")
+    end
+
+    assert_raises(ActiveRecord::RecordInvalid) do
+      Group.create!(name: "foo", group_class: "")
+    end
+
+    assert_raises(ActiveRecord::RecordInvalid) do
+      Group.create!(name: "foo", group_class: "bogus")
+    end
+  end
+
+  test "cannot change group_class on an already created group" do
+    set_user_from_auth :active_trustedclient
+    g = Group.create!(name: "foo", group_class: "role")
+    assert_raises(ActiveRecord::RecordInvalid) do
+      g.update_attributes!(group_class: "project")
+    end
+  end
+
+  test "role cannot own things" do
+    set_user_from_auth :active_trustedclient
+    role = Group.create!(name: "foo", group_class: "role")
+    assert_raises(ArvadosModel::PermissionDeniedError) do
+      Collection.create!(name: "bzzz123", owner_uuid: role.uuid)
+    end
+
+    c = Collection.create!(name: "bzzz124")
+    assert_raises(ArvadosModel::PermissionDeniedError) do
+      c.update_attributes!(owner_uuid: role.uuid)
+    end
+  end
+
   test "trash group hides contents" do
     set_user_from_auth :active_trustedclient
 
@@ -237,7 +274,8 @@ class GroupTest < ActiveSupport::TestCase
     set_user_from_auth :active
     ["", "{SOLIDUS}"].each do |subst|
       Rails.configuration.Collections.ForwardSlashNameSubstitution = subst
-      g = Group.create group_class: "project"
+      proj = Group.create group_class: "project"
+      role = Group.create group_class: "role"
       [[nil, true],
        ["", true],
        [".", false],
@@ -248,11 +286,10 @@ class GroupTest < ActiveSupport::TestCase
        ["../..", subst != ""],
        ["/", subst != ""],
       ].each do |name, valid|
-        g.name = name
-        g.group_class = "role"
-        assert_equal true, g.valid?
-        g.group_class = "project"
-        assert_equal valid, g.valid?, "#{name.inspect} should be #{valid ? "valid" : "invalid"}"
+        role.name = name
+        assert_equal true, role.valid?
+        proj.name = name
+        assert_equal valid, proj.valid?, "#{name.inspect} should be #{valid ? "valid" : "invalid"}"
       end
     end
   end
diff --git a/services/api/test/unit/permission_test.rb b/services/api/test/unit/permission_test.rb
index 8e2569ccc..4849b385b 100644
--- a/services/api/test/unit/permission_test.rb
+++ b/services/api/test/unit/permission_test.rb
@@ -423,7 +423,7 @@ class PermissionTest < ActiveSupport::TestCase
 
   test "add user to group, then remove them" do
     set_user_from_auth :admin
-    grp = Group.create!(owner_uuid: system_user_uuid, group_class: "role")
+    grp = Group.create!(owner_uuid: system_user_uuid, group_class: "project")
     col = Collection.create!(owner_uuid: grp.uuid)
     assert_empty Collection.readable_by(users(:active)).where(uuid: col.uuid)
     assert_empty User.readable_by(users(:active)).where(uuid: users(:project_viewer).uuid)

commit aebf03862c0e5303cc4bb926585b8892ba7d0e4f
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Fri May 29 00:04:12 2020 -0400

    16007: Validate group_class is set to 'project' or 'role'
    
    Fix tests.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/services/api/app/models/group.rb b/services/api/app/models/group.rb
index 36814a316..d6fc818cd 100644
--- a/services/api/app/models/group.rb
+++ b/services/api/app/models/group.rb
@@ -17,6 +17,7 @@ class Group < ArvadosModel
   attribute :properties, :jsonbHash, default: {}
 
   validate :ensure_filesystem_compatible_name
+  validate :check_group_class
   before_create :assign_name
   after_create :after_ownership_change
   after_create :update_trash
@@ -44,6 +45,12 @@ class Group < ArvadosModel
     super if group_class == 'project'
   end
 
+  def check_group_class
+    if group_class != 'project' && group_class != 'role'
+      errors.add :group_class, "value must be one of 'project' or 'role', was '#{group_class}'"
+    end
+  end
+
   def update_trash
     if trash_at_changed? or owner_uuid_changed?
       # The group was added or removed from the trash.
diff --git a/services/api/test/fixtures/groups.yml b/services/api/test/fixtures/groups.yml
index 22c999ecd..68377eb5f 100644
--- a/services/api/test/fixtures/groups.yml
+++ b/services/api/test/fixtures/groups.yml
@@ -107,6 +107,7 @@ bad_group_has_ownership_cycle_a:
   modified_at: 2014-05-03 18:50:08 -0400
   updated_at: 2014-05-03 18:50:08 -0400
   name: Owned by bad group b
+  group_class: project
 
 bad_group_has_ownership_cycle_b:
   uuid: zzzzz-j7d0g-0077nzts8c178lw
@@ -117,6 +118,7 @@ bad_group_has_ownership_cycle_b:
   modified_at: 2014-05-03 18:50:08 -0400
   updated_at: 2014-05-03 18:50:08 -0400
   name: Owned by bad group a
+  group_class: project
 
 anonymous_group:
   uuid: zzzzz-j7d0g-anonymouspublic
diff --git a/services/api/test/functional/application_controller_test.rb b/services/api/test/functional/application_controller_test.rb
index 175a8f71e..2cfa05444 100644
--- a/services/api/test/functional/application_controller_test.rb
+++ b/services/api/test/functional/application_controller_test.rb
@@ -100,7 +100,7 @@ class ApplicationControllerTest < ActionController::TestCase
         @controller = Arvados::V1::GroupsController.new
         authorize_with :active
         post :create, params: {
-          group: {},
+          group: {group_class: "project"},
           ensure_unique_name: boolparam
         }
         assert_response :success
@@ -113,7 +113,8 @@ class ApplicationControllerTest < ActionController::TestCase
         post :create, params: {
           group: {
             name: groups(:aproject).name,
-            owner_uuid: groups(:aproject).owner_uuid
+            owner_uuid: groups(:aproject).owner_uuid,
+            group_class: "project"
           },
           ensure_unique_name: boolparam
         }
diff --git a/services/api/test/functional/arvados/v1/repositories_controller_test.rb b/services/api/test/functional/arvados/v1/repositories_controller_test.rb
index cfcd917d6..84bd846c9 100644
--- a/services/api/test/functional/arvados/v1/repositories_controller_test.rb
+++ b/services/api/test/functional/arvados/v1/repositories_controller_test.rb
@@ -150,7 +150,7 @@ class Arvados::V1::RepositoriesControllerTest < ActionController::TestCase
   test "get_all_permissions obeys group permissions" do
     act_as_user system_user do
       r = Repository.create!(name: 'admin/groupcanwrite', owner_uuid: users(:admin).uuid)
-      g = Group.create!(group_class: 'group', name: 'repo-writers')
+      g = Group.create!(group_class: 'role', name: 'repo-writers')
       u1 = users(:active)
       u2 = users(:spectator)
       Link.create!(tail_uuid: g.uuid, head_uuid: r.uuid, link_class: 'permission', name: 'can_manage')
@@ -158,7 +158,7 @@ class Arvados::V1::RepositoriesControllerTest < ActionController::TestCase
       Link.create!(tail_uuid: u2.uuid, head_uuid: g.uuid, link_class: 'permission', name: 'can_read')
 
       r = Repository.create!(name: 'admin/groupreadonly', owner_uuid: users(:admin).uuid)
-      g = Group.create!(group_class: 'group', name: 'repo-readers')
+      g = Group.create!(group_class: 'role', name: 'repo-readers')
       u1 = users(:active)
       u2 = users(:spectator)
       Link.create!(tail_uuid: g.uuid, head_uuid: r.uuid, link_class: 'permission', name: 'can_read')
diff --git a/services/api/test/functional/arvados/v1/users_controller_test.rb b/services/api/test/functional/arvados/v1/users_controller_test.rb
index 817a1c9ef..0ce9f1137 100644
--- a/services/api/test/functional/arvados/v1/users_controller_test.rb
+++ b/services/api/test/functional/arvados/v1/users_controller_test.rb
@@ -660,7 +660,7 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
 
   test "non-admin user gets only safe attributes from users#show" do
     g = act_as_system_user do
-      create :group
+      create :group, group_class: "role"
     end
     users = create_list :active_user, 2, join_groups: [g]
     token = create :token, user: users[0]
@@ -672,7 +672,7 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
   [2, 4].each do |limit|
     test "non-admin user can limit index to #{limit}" do
       g = act_as_system_user do
-        create :group
+        create :group, group_class: "role"
       end
       users = create_list :active_user, 4, join_groups: [g]
       token = create :token, user: users[0]
diff --git a/services/api/test/integration/groups_test.rb b/services/api/test/integration/groups_test.rb
index 445670a3d..702176127 100644
--- a/services/api/test/integration/groups_test.rb
+++ b/services/api/test/integration/groups_test.rb
@@ -206,7 +206,8 @@ class NonTransactionalGroupsTest < ActionDispatch::IntegrationTest
     post "/arvados/v1/groups",
       params: {
         group: {
-          name: name
+          name: name,
+          group_class: "project"
         },
         async: true
       },
diff --git a/services/api/test/performance/permission_test.rb b/services/api/test/performance/permission_test.rb
index d0e6413b1..e5d62cf4c 100644
--- a/services/api/test/performance/permission_test.rb
+++ b/services/api/test/performance/permission_test.rb
@@ -24,7 +24,7 @@ class PermissionPerfTest < ActionDispatch::IntegrationTest
     act_as_system_user do
       puts("Time spent creating records:", Benchmark.measure do
              ActiveRecord::Base.transaction do
-               root = Group.create!(owner_uuid: users(:permission_perftest).uuid)
+               root = Group.create!(owner_uuid: users(:permission_perftest).uuid, group_class: "project")
                n += 1
                a = create_eight root.uuid
                n += 8
diff --git a/services/api/test/unit/arvados_model_test.rb b/services/api/test/unit/arvados_model_test.rb
index d447c76c6..c1db8c8b5 100644
--- a/services/api/test/unit/arvados_model_test.rb
+++ b/services/api/test/unit/arvados_model_test.rb
@@ -97,7 +97,7 @@ class ArvadosModelTest < ActiveSupport::TestCase
     while longstring.length < 2**16
       longstring = longstring + longstring
     end
-    g = Group.create! name: 'Has a long description', description: longstring
+    g = Group.create! name: 'Has a long description', description: longstring, group_class: "project"
     g = Group.find_by_uuid g.uuid
     assert_equal g.description, longstring
   end
@@ -248,7 +248,7 @@ class ArvadosModelTest < ActiveSupport::TestCase
 
   test 'create and retrieve using created_at time' do
     set_user_from_auth :active
-    group = Group.create! name: 'test create and retrieve group'
+    group = Group.create! name: 'test create and retrieve group', group_class: "project"
     assert group.valid?, "group is not valid"
 
     results = Group.where(created_at: group.created_at)
@@ -258,7 +258,7 @@ class ArvadosModelTest < ActiveSupport::TestCase
 
   test 'create and update twice and expect different update times' do
     set_user_from_auth :active
-    group = Group.create! name: 'test create and retrieve group'
+    group = Group.create! name: 'test create and retrieve group', group_class: "project"
     assert group.valid?, "group is not valid"
 
     # update 1
diff --git a/services/api/test/unit/group_test.rb b/services/api/test/unit/group_test.rb
index 24d7333ab..f7a531fc0 100644
--- a/services/api/test/unit/group_test.rb
+++ b/services/api/test/unit/group_test.rb
@@ -31,8 +31,8 @@ class GroupTest < ActiveSupport::TestCase
   test "cannot create a new ownership cycle" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
-    g_bar = Group.create!(name: "bar")
+    g_foo = Group.create!(name: "foo", group_class: "project")
+    g_bar = Group.create!(name: "bar", group_class: "project")
 
     g_foo.owner_uuid = g_bar.uuid
     assert g_foo.save, lambda { g_foo.errors.messages }
@@ -45,7 +45,7 @@ class GroupTest < ActiveSupport::TestCase
   test "cannot create a single-object ownership cycle" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
+    g_foo = Group.create!(name: "foo", group_class: "project")
     assert g_foo.save
 
     # Ensure I have permission to manage this group even when its owner changes
@@ -63,7 +63,7 @@ class GroupTest < ActiveSupport::TestCase
   test "trash group hides contents" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
+    g_foo = Group.create!(name: "foo", group_class: "project")
     col = Collection.create!(owner_uuid: g_foo.uuid)
 
     assert Collection.readable_by(users(:active)).where(uuid: col.uuid).any?
@@ -77,9 +77,9 @@ class GroupTest < ActiveSupport::TestCase
   test "trash group" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
-    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid)
-    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid)
+    g_foo = Group.create!(name: "foo", group_class: "project")
+    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid, group_class: "project")
+    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid, group_class: "project")
 
     assert Group.readable_by(users(:active)).where(uuid: g_foo.uuid).any?
     assert Group.readable_by(users(:active)).where(uuid: g_bar.uuid).any?
@@ -98,9 +98,9 @@ class GroupTest < ActiveSupport::TestCase
   test "trash subgroup" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
-    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid)
-    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid)
+    g_foo = Group.create!(name: "foo", group_class: "project")
+    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid, group_class: "project")
+    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid, group_class: "project")
 
     assert Group.readable_by(users(:active)).where(uuid: g_foo.uuid).any?
     assert Group.readable_by(users(:active)).where(uuid: g_bar.uuid).any?
@@ -118,9 +118,9 @@ class GroupTest < ActiveSupport::TestCase
   test "trash subsubgroup" do
     set_user_from_auth :active_trustedclient
 
-    g_foo = Group.create!(name: "foo")
-    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid)
-    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid)
+    g_foo = Group.create!(name: "foo", group_class: "project")
+    g_bar = Group.create!(name: "bar", owner_uuid: g_foo.uuid, group_class: "project")
+    g_baz = Group.create!(name: "baz", owner_uuid: g_bar.uuid, group_class: "project")
 
     assert Group.readable_by(users(:active)).where(uuid: g_foo.uuid).any?
     assert Group.readable_by(users(:active)).where(uuid: g_bar.uuid).any?
@@ -168,7 +168,7 @@ class GroupTest < ActiveSupport::TestCase
   test "trashed does not propagate across permission links" do
     set_user_from_auth :admin
 
-    g_foo = Group.create!(name: "foo")
+    g_foo = Group.create!(name: "foo", group_class: "project")
     u_bar = User.create!(first_name: "bar")
 
     assert Group.readable_by(users(:admin)).where(uuid: g_foo.uuid).any?
@@ -237,7 +237,7 @@ class GroupTest < ActiveSupport::TestCase
     set_user_from_auth :active
     ["", "{SOLIDUS}"].each do |subst|
       Rails.configuration.Collections.ForwardSlashNameSubstitution = subst
-      g = Group.create
+      g = Group.create group_class: "project"
       [[nil, true],
        ["", true],
        [".", false],
diff --git a/services/api/test/unit/owner_test.rb b/services/api/test/unit/owner_test.rb
index ca02e2db5..e356f4d9f 100644
--- a/services/api/test/unit/owner_test.rb
+++ b/services/api/test/unit/owner_test.rb
@@ -21,7 +21,11 @@ class OwnerTest < ActiveSupport::TestCase
   Group.all
   [User, Group].each do |o_class|
     test "create object with legit #{o_class} owner" do
-      o = o_class.create!
+      if o_class == Group
+        o = o_class.create! group_class: "project"
+      else
+        o = o_class.create!
+      end
       i = Specimen.create(owner_uuid: o.uuid)
       assert i.valid?, "new item should pass validation"
       assert i.uuid, "new item should have an ID"
@@ -44,9 +48,19 @@ class OwnerTest < ActiveSupport::TestCase
 
     [User, Group].each do |new_o_class|
       test "change owner from legit #{o_class} to legit #{new_o_class} owner" do
-        o = o_class.create!
+        o = if o_class == Group
+              o_class.create! group_class: "project"
+            else
+              o_class.create!
+            end
         i = Specimen.create!(owner_uuid: o.uuid)
-        new_o = new_o_class.create!
+
+        new_o = if new_o_class == Group
+              new_o_class.create! group_class: "project"
+            else
+              new_o_class.create!
+            end
+
         assert(Specimen.where(uuid: i.uuid).any?,
                "new item should really be in DB")
         assert(i.update_attributes(owner_uuid: new_o.uuid),
@@ -55,7 +69,11 @@ class OwnerTest < ActiveSupport::TestCase
     end
 
     test "delete #{o_class} that owns nothing" do
-      o = o_class.create!
+      if o_class == Group
+        o = o_class.create! group_class: "project"
+      else
+        o = o_class.create!
+      end
       assert(o_class.where(uuid: o.uuid).any?,
              "new #{o_class} should really be in DB")
       assert(o.destroy, "should delete #{o_class} that owns nothing")
@@ -65,7 +83,11 @@ class OwnerTest < ActiveSupport::TestCase
 
     test "change uuid of #{o_class} that owns nothing" do
       # (we're relying on our admin credentials here)
-      o = o_class.create!
+      if o_class == Group
+        o = o_class.create! group_class: "project"
+      else
+        o = o_class.create!
+      end
       assert(o_class.where(uuid: o.uuid).any?,
              "new #{o_class} should really be in DB")
       old_uuid = o.uuid
diff --git a/services/api/test/unit/permission_test.rb b/services/api/test/unit/permission_test.rb
index cb5ae7ba2..8e2569ccc 100644
--- a/services/api/test/unit/permission_test.rb
+++ b/services/api/test/unit/permission_test.rb
@@ -153,6 +153,7 @@ class PermissionTest < ActiveSupport::TestCase
     set_user_from_auth :admin
 
     owner_grp = Group.create!(owner_uuid: users(:active).uuid, group_class: "role")
+
     sp_grp = Group.create!(group_class: "project")
 
     Link.create!(link_class: 'permission',
@@ -227,7 +228,7 @@ class PermissionTest < ActiveSupport::TestCase
     # anyone any additional permissions.)
     g = nil
     act_as_user manager do
-      g = create :group, name: "NoBigSecret Lab"
+      g = create :group, name: "NoBigSecret Lab", group_class: "role"
       assert_empty(User.readable_by(manager).where(uuid: minion.uuid),
                    "saw a user I shouldn't see")
       assert_raises(ArvadosModel::PermissionDeniedError,
@@ -323,7 +324,7 @@ class PermissionTest < ActiveSupport::TestCase
                      "#{a.first_name} should not be able to see 'b' in the user list")
 
     act_as_system_user do
-      g = create :group
+      g = create :group, group_class: "role"
       [a,b].each do |u|
         create(:permission_link,
                name: 'can_read', tail_uuid: u.uuid, head_uuid: g.uuid)

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