| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _LINUX_CGROUP_NAMESPACE_H |
| 3 | #define _LINUX_CGROUP_NAMESPACE_H |
| 4 | |
| 5 | #include <linux/ns_common.h> |
| 6 | |
| 7 | struct cgroup_namespace { |
| 8 | struct ns_common ns; |
| 9 | struct user_namespace *user_ns; |
| 10 | struct ucounts *ucounts; |
| 11 | struct css_set *root_cset; |
| 12 | }; |
| 13 | |
| 14 | extern struct cgroup_namespace init_cgroup_ns; |
| 15 | |
| 16 | #ifdef CONFIG_CGROUPS |
| 17 | |
| 18 | static inline struct cgroup_namespace *to_cg_ns(struct ns_common *ns) |
| 19 | { |
| 20 | return container_of(ns, struct cgroup_namespace, ns); |
| 21 | } |
| 22 | |
| 23 | void free_cgroup_ns(struct cgroup_namespace *ns); |
| 24 | |
| 25 | struct cgroup_namespace *copy_cgroup_ns(u64 flags, |
| 26 | struct user_namespace *user_ns, |
| 27 | struct cgroup_namespace *old_ns); |
| 28 | |
| 29 | int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen, |
| 30 | struct cgroup_namespace *ns); |
| 31 | |
| 32 | static inline void get_cgroup_ns(struct cgroup_namespace *ns) |
| 33 | { |
| 34 | ns_ref_inc(ns); |
| 35 | } |
| 36 | |
| 37 | static inline void put_cgroup_ns(struct cgroup_namespace *ns) |
| 38 | { |
| 39 | if (ns_ref_put(ns)) |
| 40 | free_cgroup_ns(ns); |
| 41 | } |
| 42 | |
| 43 | #else /* !CONFIG_CGROUPS */ |
| 44 | |
| 45 | static inline void free_cgroup_ns(struct cgroup_namespace *ns) { } |
| 46 | static inline struct cgroup_namespace * |
| 47 | copy_cgroup_ns(u64 flags, struct user_namespace *user_ns, |
| 48 | struct cgroup_namespace *old_ns) |
| 49 | { |
| 50 | return old_ns; |
| 51 | } |
| 52 | |
| 53 | static inline void get_cgroup_ns(struct cgroup_namespace *ns) { } |
| 54 | static inline void put_cgroup_ns(struct cgroup_namespace *ns) { } |
| 55 | |
| 56 | #endif /* !CONFIG_CGROUPS */ |
| 57 | |
| 58 | #endif /* _LINUX_CGROUP_NAMESPACE_H */ |
| 59 |