cgroups: add check for lxc.cgroup.use

Closes #870.

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>

diff --git a/src/lxc/cgroups/cgroup.c b/src/lxc/cgroups/cgroup.c
index 1f78a6317e09a229aebf52afd9bf306208c3c084..5491d5c0eca7830516bffcc13bd8378d9b03c68e 100644 (file)
--- a/src/lxc/cgroups/cgroup.c
+++ b/src/lxc/cgroups/cgroup.c
@@ -26,6 +26,7 @@
 
 #include "cgroup.h"
 #include "conf.h"
+#include "initutils.h"
 #include "log.h"
 #include "start.h"
 
@@ -246,9 +247,14 @@ void prune_init_scope(char *cg)
  * is not mounted then it will be ignored. But if systemd is mounted, then it
  * must be setup so that lxc can create cgroups in it, else containers will
  * fail.
+ *
+ * cgroups listed in lxc.cgroup.use are also treated as crucial
+ *
  */
 bool is_crucial_cgroup_subsystem(const char *s)
 {
+       const char *cgroup_use;
+
        if (strcmp(s, "systemd") == 0)
                return true;
 
@@ -258,5 +264,9 @@ bool is_crucial_cgroup_subsystem(const char *s)
        if (strcmp(s, "freezer") == 0)
                return true;
 
+       cgroup_use = lxc_global_config_value("lxc.cgroup.use");
+       if (cgroup_use && strstr(cgroup_use, s))
+               return true;
+
        return false;
 }