struct cgroup_iter_priv *p = (struct cgroup_iter_priv *)priv;
struct cgroup *cgrp = aux->cgroup.start;
+ /* bpf_iter_attach_cgroup() has already acquired an extra reference
+ * for the start cgroup, but the reference may be released after
+ * cgroup_iter_seq_init(), so acquire another reference for the
+ * start cgroup.
+ */
p->start_css = &cgrp->self;
+ css_get(p->start_css);
p->terminate = false;
p->visited_all = false;
p->order = aux->cgroup.order;
return 0;
}
+static void cgroup_iter_seq_fini(void *priv)
+{
+ struct cgroup_iter_priv *p = (struct cgroup_iter_priv *)priv;
+
+ css_put(p->start_css);
+}
+
static const struct bpf_iter_seq_info cgroup_iter_seq_info = {
.seq_ops = &cgroup_iter_seq_ops,
.init_seq_private = cgroup_iter_seq_init,
+ .fini_seq_private = cgroup_iter_seq_fini,
.seq_priv_size = sizeof(struct cgroup_iter_priv),
};