diff options
Diffstat (limited to 'kernel/include/net/cls_cgroup.h')
| -rw-r--r-- | kernel/include/net/cls_cgroup.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/kernel/include/net/cls_cgroup.h b/kernel/include/net/cls_cgroup.h new file mode 100644 index 000000000..c15d39456 --- /dev/null +++ b/kernel/include/net/cls_cgroup.h @@ -0,0 +1,57 @@ +/* + * cls_cgroup.h Control Group Classifier + * + * Authors: Thomas Graf <tgraf@suug.ch> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#ifndef _NET_CLS_CGROUP_H +#define _NET_CLS_CGROUP_H + +#include <linux/cgroup.h> +#include <linux/hardirq.h> +#include <linux/rcupdate.h> +#include <net/sock.h> + +#ifdef CONFIG_CGROUP_NET_CLASSID +struct cgroup_cls_state { + struct cgroup_subsys_state css; + u32 classid; +}; + +struct cgroup_cls_state *task_cls_state(struct task_struct *p); + +static inline u32 task_cls_classid(struct task_struct *p) +{ + u32 classid; + + if (in_interrupt()) + return 0; + + rcu_read_lock(); + classid = container_of(task_css(p, net_cls_cgrp_id), + struct cgroup_cls_state, css)->classid; + rcu_read_unlock(); + + return classid; +} + +static inline void sock_update_classid(struct sock *sk) +{ + u32 classid; + + classid = task_cls_classid(current); + if (classid != sk->sk_classid) + sk->sk_classid = classid; +} +#else /* !CONFIG_CGROUP_NET_CLASSID */ +static inline void sock_update_classid(struct sock *sk) +{ +} +#endif /* CONFIG_CGROUP_NET_CLASSID */ +#endif /* _NET_CLS_CGROUP_H */ |