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-rw-r--r--kernel/bpf/helpers.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 01878db15eaf..bafc53ddd350 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -340,6 +340,24 @@ const struct bpf_func_proto bpf_get_current_cgroup_id_proto = {
.ret_type = RET_INTEGER,
};
+BPF_CALL_1(bpf_get_current_ancestor_cgroup_id, int, ancestor_level)
+{
+ struct cgroup *cgrp = task_dfl_cgroup(current);
+ struct cgroup *ancestor;
+
+ ancestor = cgroup_ancestor(cgrp, ancestor_level);
+ if (!ancestor)
+ return 0;
+ return cgroup_id(ancestor);
+}
+
+const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto = {
+ .func = bpf_get_current_ancestor_cgroup_id,
+ .gpl_only = false,
+ .ret_type = RET_INTEGER,
+ .arg1_type = ARG_ANYTHING,
+};
+
#ifdef CONFIG_CGROUP_BPF
DECLARE_PER_CPU(struct bpf_cgroup_storage*,
bpf_cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]);