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gerrit-public.fairphone.software / kernel / msm-4.19 / 022aa51e3fda0b3c6688defaa859961c11c36ec8 / . / include / net / cls_cgroup.h
blob: 33d03b648646ce04114c73c65853a0b19b548fa4 [file] [log] [blame]
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]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
Daniel Wagner8fb974c2012-09-12 16:12:02 +0200[diff] [blame]20#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]21struct cgroup_cls_state
22{
23 struct cgroup_subsys_state css;
24 u32 classid;
25};
26
Joe Perches37830722013-07-31 17:31:39 -0700[diff] [blame]27void sock_update_classid(struct sock *sk);
Daniel Wagnerf3419802012-09-12 16:12:01 +0200[diff] [blame]28
Daniel Wagner8fb974c2012-09-12 16:12:02 +0200[diff] [blame]29#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]30static inline u32 task_cls_classid(struct task_struct *p)
31{
Daniel Wagner920750c2012-10-25 04:16:56 +0000[diff] [blame]32 u32 classid;
Li Zefan3fb5a992010-09-02 15:42:43 +0000[diff] [blame]33
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]34 if (in_interrupt())
35 return 0;
36
Li Zefan3fb5a992010-09-02 15:42:43 +0000[diff] [blame]37 rcu_read_lock();
Tejun Heo8af01f52013-08-08 20:11:22 -0400[diff] [blame]38 classid = container_of(task_css(p, net_cls_subsys_id),
Li Zefan3fb5a992010-09-02 15:42:43 +0000[diff] [blame]39 struct cgroup_cls_state, css)->classid;
40 rcu_read_unlock();
41
42 return classid;
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]43}
Daniel Wagner8fb974c2012-09-12 16:12:02 +0200[diff] [blame]44#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]45static inline u32 task_cls_classid(struct task_struct *p)
46{
Daniel Wagner8a8e04d2012-09-12 16:12:07 +0200[diff] [blame]47 struct cgroup_subsys_state *css;
Herbert Xuea16f912010-05-25 18:53:57 -0700[diff] [blame]48 u32 classid = 0;
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]49
50 if (in_interrupt())
51 return 0;
52
53 rcu_read_lock();
Tejun Heo8af01f52013-08-08 20:11:22 -0400[diff] [blame]54 css = task_css(p, net_cls_subsys_id);
Daniel Wagner8a8e04d2012-09-12 16:12:07 +0200[diff] [blame]55 if (css)
56 classid = container_of(css,
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]57 struct cgroup_cls_state, css)->classid;
58 rcu_read_unlock();
59
60 return classid;
61}
62#endif
Daniel Wagner8fb974c2012-09-12 16:12:02 +0200[diff] [blame]63#else /* !CGROUP_NET_CLS_CGROUP */
Zefan Li211d2f972013-04-08 20:03:35 +0000[diff] [blame]64static inline void sock_update_classid(struct sock *sk)
Daniel Wagnerf3419802012-09-12 16:12:01 +0200[diff] [blame]65{
66}
67
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]68static inline u32 task_cls_classid(struct task_struct *p)
69{
70 return 0;
71}
Daniel Wagner8fb974c2012-09-12 16:12:02 +0200[diff] [blame]72#endif /* CGROUP_NET_CLS_CGROUP */
Herbert Xuf8451722010-05-24 00:12:34 -0700[diff] [blame]73#endif /* _NET_CLS_CGROUP_H */