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, 0 insertions, 6 deletions

diff --git a/src/core/main.c b/src/core/main.c
index c123de91ce..3c6fccf527 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -88,7 +88,6 @@ static int arg_crash_chvt = -1;
 static bool arg_confirm_spawn = false;
 static bool arg_show_status = true;
 static bool arg_switched_root = false;
-static char **arg_default_controllers = NULL;
 static char ***arg_join_controllers = NULL;
 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
@@ -642,7 +641,6 @@ static int parse_config_file(void) {
                 { "Manager", "ShowStatus",            config_parse_bool,         0, &arg_show_status         },
                 { "Manager", "CrashChVT",             config_parse_int,          0, &arg_crash_chvt          },
                 { "Manager", "CPUAffinity",           config_parse_cpu_affinity2, 0, NULL                    },
-                { "Manager", "DefaultControllers",    config_parse_strv,         0, &arg_default_controllers },
                 { "Manager", "DefaultStandardOutput", config_parse_output,       0, &arg_default_std_output  },
                 { "Manager", "DefaultStandardError",  config_parse_output,       0, &arg_default_std_error   },
                 { "Manager", "JoinControllers",       config_parse_join_controllers, 0, &arg_join_controllers },
@@ -1632,9 +1630,6 @@ int main(int argc, char *argv[]) {
 
         manager_set_default_rlimits(m, arg_default_rlimit);
 
-        if (arg_default_controllers)
-                manager_set_default_controllers(m, arg_default_controllers);
-
         if (arg_default_environment)
                 manager_set_default_environment(m, arg_default_environment);
 
@@ -1807,7 +1802,6 @@ finish:
                 free(arg_default_rlimit[j]);
 
         free(arg_default_unit);
-        strv_free(arg_default_controllers);
         free_join_controllers();
 
         dbus_shutdown();