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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_CGROUP_NAMESPACE_H
#define _LINUX_CGROUP_NAMESPACE_H
struct cgroup_namespace {
struct ns_common ns;
struct user_namespace *user_ns;
struct ucounts *ucounts;
struct css_set *root_cset;
};
extern struct cgroup_namespace init_cgroup_ns;
#ifdef CONFIG_CGROUPS
static inline struct cgroup_namespace *to_cg_ns(struct ns_common *ns)
{
return container_of(ns, struct cgroup_namespace, ns);
}
void free_cgroup_ns(struct cgroup_namespace *ns);
struct cgroup_namespace *copy_cgroup_ns(unsigned long flags,
struct user_namespace *user_ns,
struct cgroup_namespace *old_ns);
int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,
struct cgroup_namespace *ns);
static inline void get_cgroup_ns(struct cgroup_namespace *ns)
{
refcount_inc(&ns->ns.count);
}
static inline void put_cgroup_ns(struct cgroup_namespace *ns)
{
if (refcount_dec_and_test(&ns->ns.count))
free_cgroup_ns(ns);
}
#else /* !CONFIG_CGROUPS */
static inline void free_cgroup_ns(struct cgroup_namespace *ns) { }
static inline struct cgroup_namespace *
copy_cgroup_ns(unsigned long flags, struct user_namespace *user_ns,
struct cgroup_namespace *old_ns)
{
return old_ns;
}
static inline void get_cgroup_ns(struct cgroup_namespace *ns) { }
static inline void put_cgroup_ns(struct cgroup_namespace *ns) { }
#endif /* !CONFIG_CGROUPS */
#endif /* _LINUX_CGROUP_NAMESPACE_H */
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