diff options
Diffstat (limited to 'include/net/cls_cgroup.h')
| -rw-r--r-- | include/net/cls_cgroup.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h new file mode 100644 index 00000000..0fee0617 --- /dev/null +++ b/include/net/cls_cgroup.h @@ -0,0 +1,73 @@ +/* + * 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> + +#if IS_ENABLED(CONFIG_NET_CLS_CGROUP) +struct cgroup_cls_state +{ + struct cgroup_subsys_state css; + u32 classid; +}; + +extern void sock_update_classid(struct sock *sk); + +#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP) +static inline u32 task_cls_classid(struct task_struct *p) +{ + u32 classid; + + if (in_interrupt()) + return 0; + + rcu_read_lock(); + classid = container_of(task_subsys_state(p, net_cls_subsys_id), + struct cgroup_cls_state, css)->classid; + rcu_read_unlock(); + + return classid; +} +#elif IS_MODULE(CONFIG_NET_CLS_CGROUP) +static inline u32 task_cls_classid(struct task_struct *p) +{ + struct cgroup_subsys_state *css; + u32 classid = 0; + + if (in_interrupt()) + return 0; + + rcu_read_lock(); + css = task_subsys_state(p, net_cls_subsys_id); + if (css) + classid = container_of(css, + struct cgroup_cls_state, css)->classid; + rcu_read_unlock(); + + return classid; +} +#endif +#else /* !CGROUP_NET_CLS_CGROUP */ +static inline void sock_update_classid(struct sock *sk) +{ +} + +static inline u32 task_cls_classid(struct task_struct *p) +{ + return 0; +} +#endif /* CGROUP_NET_CLS_CGROUP */ +#endif /* _NET_CLS_CGROUP_H */ |