core: general cgroup rework

Replace the very generic cgroup hookup with a much simpler one. With
this change only the high-level cgroup settings remain, the ability to
set arbitrary cgroup attributes is removed, so is support for adding
units to arbitrary cgroup controllers or setting arbitrary paths for
them (especially paths that are different for the various controllers).

This also introduces a new -.slice root slice, that is the parent of
system.slice and friends. This enables easy admin configuration of
root-level cgrouo properties.

This replaces DeviceDeny= by DevicePolicy=, and implicitly adds in
/dev/null, /dev/zero and friends if DeviceAllow= is used (unless this is
turned off by DevicePolicy=).

1 files changed, 6 insertions, 11 deletions

diff --git a/src/core/execute.h b/src/core/execute.h
index 15574dc97e..c1e9717dc8 100644
--- a/src/core/execute.h
+++ b/src/core/execute.h
@@ -33,14 +33,11 @@ typedef struct ExecContext ExecContext;
 #include <stdio.h>
 #include <sched.h>
 
-struct CGroupBonding;
-struct CGroupAttribute;
-
-typedef struct Unit Unit;
-
 #include "list.h"
 #include "util.h"
 
+typedef struct Unit Unit;
+
 typedef enum ExecInput {
         EXEC_INPUT_NULL,
         EXEC_INPUT_TTY,
@@ -148,9 +145,6 @@ struct ExecContext {
 
         bool no_new_privileges;
 
-        bool control_group_modify;
-        int control_group_persistent;
-
         /* This is not exposed to the user but available
          * internally. We need it to make sure that whenever we spawn
          * /bin/mount it is run in the same process group as us so
@@ -166,6 +160,8 @@ struct ExecContext {
         bool cpu_sched_set:1;
 };
 
+#include "cgroup.h"
+
 int exec_spawn(ExecCommand *command,
                char **argv,
                ExecContext *context,
@@ -175,9 +171,8 @@ int exec_spawn(ExecCommand *command,
                bool apply_chroot,
                bool apply_tty_stdin,
                bool confirm_spawn,
-               struct CGroupBonding *cgroup_bondings,
-               struct CGroupAttribute *cgroup_attributes,
-               const char *cgroup_suffix,
+               CGroupControllerMask cgroup_mask,
+               const char *cgroup_path,
                const char *unit_id,
                int pipe_fd[2],
                pid_t *ret);