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Diffstat (limited to 'include/linux/cgroup-defs.h')
-rw-r--r--include/linux/cgroup-defs.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 8cfbc9dfd650..7f334c2cbca9 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -225,6 +225,14 @@ struct cgroup {
int id;
/*
+ * The depth this cgroup is at. The root is at depth zero and each
+ * step down the hierarchy increments the level. This along with
+ * ancestor_ids[] can determine whether a given cgroup is a
+ * descendant of another without traversing the hierarchy.
+ */
+ int level;
+
+ /*
* Each non-empty css_set associated with this cgroup contributes
* one to populated_cnt. All children with non-zero popuplated_cnt
* of their own contribute one. The count is zero iff there's no
@@ -279,6 +287,9 @@ struct cgroup {
/* used to schedule release agent */
struct work_struct release_agent_work;
+
+ /* ids of the ancestors at each level including self */
+ int ancestor_ids[];
};
/*
@@ -298,6 +309,9 @@ struct cgroup_root {
/* The root cgroup. Root is destroyed on its release. */
struct cgroup cgrp;
+ /* for cgrp->ancestor_ids[0] */
+ int cgrp_ancestor_id_storage;
+
/* Number of cgroups in the hierarchy, used only for /proc/cgroups */
atomic_t nr_cgrps;