logind: port over to use scopes+slices for all cgroup stuff

In order to prepare things for the single-writer cgroup scheme, let's
make logind use systemd's own primitives for cgroup management.

Every login user now gets his own private slice unit, in which his sessions
live in a scope unit each. Also, add user@$UID.service to the same
slice, and implicitly start it on first login.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/login/logind-user.h b/src/login/logind-user.h
index 16d798541..889f828c4 100644
--- a/src/login/logind-user.h
+++ b/src/login/logind-user.h
@@ -30,6 +30,7 @@ typedef struct User User;
 
 typedef enum UserState {
         USER_OFFLINE,    /* Not logged in at all */
+        USER_OPENING,    /* Is logging in */
         USER_LINGERING,  /* Lingering has been enabled by the admin for this user */
         USER_ONLINE,     /* User logged in */
         USER_ACTIVE,     /* User logged in and has a session in the fg */
@@ -47,16 +48,21 @@ struct User {
 
         char *state_file;
         char *runtime_path;
+
         char *service;
-        char *cgroup_path;
         char *slice;
 
+        char *service_job;
+        char *slice_job;
+
         Session *display;
 
         dual_timestamp timestamp;
 
         bool in_gc_queue:1;
         bool started:1;
+        bool slice_created:1;
+        bool service_created:1;
 
         LIST_HEAD(Session, sessions);
         LIST_FIELDS(User, gc_queue);