tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * cls_cgroup.h Control Group Classifier
3 *
4 * Authors: Thomas Graf <tgraf@suug.ch>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 *
11 */
12
13#ifndef _NET_CLS_CGROUP_H
14#define _NET_CLS_CGROUP_H
15
16#include <linux/cgroup.h>
17#include <linux/hardirq.h>
18#include <linux/rcupdate.h>
19
20#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
21struct cgroup_cls_state
22{
23 struct cgroup_subsys_state css;
24 u32 classid;
25};
26
27extern void sock_update_classid(struct sock *sk);
28
29#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
30static inline u32 task_cls_classid(struct task_struct *p)
31{
32 u32 classid;
33
34 if (in_interrupt())
35 return 0;
36
37 rcu_read_lock();
38 classid = container_of(task_subsys_state(p, net_cls_subsys_id),
39 struct cgroup_cls_state, css)->classid;
40 rcu_read_unlock();
41
42 return classid;
43}
44#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
45static inline u32 task_cls_classid(struct task_struct *p)
46{
47 struct cgroup_subsys_state *css;
48 u32 classid = 0;
49
50 if (in_interrupt())
51 return 0;
52
53 rcu_read_lock();
54 css = task_subsys_state(p, net_cls_subsys_id);
55 if (css)
56 classid = container_of(css,
57 struct cgroup_cls_state, css)->classid;
58 rcu_read_unlock();
59
60 return classid;
61}
62#endif
63#else /* !CGROUP_NET_CLS_CGROUP */
64static inline void sock_update_classid(struct sock *sk)
65{
66}
67
68static inline u32 task_cls_classid(struct task_struct *p)
69{
70 return 0;
71}
72#endif /* CGROUP_NET_CLS_CGROUP */
73#endif /* _NET_CLS_CGROUP_H */