static int cgrp_css_online(struct cgroup *cgrp)
{
if (cgrp->parent)
cgrp_cls_state(cgrp)->classid =
cgrp_cls_state(cgrp->parent)->classid;
return 0;
}
static struct cgroup_subsys_state *cgrp_create(struct cgroup *cgrp)
{
struct cgroup_cls_state *cs;
cs = kzalloc(sizeof(*cs), GFP_KERNEL);
if (!cs)
return ERR_PTR(-ENOMEM);
if (cgrp->parent)
cs->classid = cgrp_cls_state(cgrp->parent)->classid;
return &cs->css;
}
static void cgrp_css_free(struct cgroup *cgrp)
{
kfree(cgrp_cls_state(cgrp));
}
static int write_classid(struct cgroup *cgrp, struct cftype *cft, u64 value)
{
cgrp_cls_state(cgrp)->classid = (u32) value;
return 0;
}
static u64 read_classid(struct cgroup *cgrp, struct cftype *cft)
{
return cgrp_cls_state(cgrp)->classid;
}
static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
{
kfree(cgrp_cls_state(cgrp));
}