Herbert Xu | f845172 | 2010-05-24 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 Wagner | 8fb974c | 2012-09-12 16:12:02 +0200 | [diff] [blame] | 20 | #if IS_ENABLED(CONFIG_NET_CLS_CGROUP) |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 21 | struct cgroup_cls_state |
| 22 | { |
| 23 | struct cgroup_subsys_state css; |
| 24 | u32 classid; |
| 25 | }; |
| 26 | |
Daniel Wagner | f341980 | 2012-09-12 16:12:01 +0200 | [diff] [blame] | 27 | extern void sock_update_classid(struct sock *sk); |
| 28 | |
Daniel Wagner | 8fb974c | 2012-09-12 16:12:02 +0200 | [diff] [blame] | 29 | #if IS_BUILTIN(CONFIG_NET_CLS_CGROUP) |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 30 | static inline u32 task_cls_classid(struct task_struct *p) |
| 31 | { |
Li Zefan | 3fb5a99 | 2010-09-02 15:42:43 +0000 | [diff] [blame] | 32 | int classid; |
| 33 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 34 | if (in_interrupt()) |
| 35 | return 0; |
| 36 | |
Li Zefan | 3fb5a99 | 2010-09-02 15:42:43 +0000 | [diff] [blame] | 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; |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 43 | } |
Daniel Wagner | 8fb974c | 2012-09-12 16:12:02 +0200 | [diff] [blame] | 44 | #elif IS_MODULE(CONFIG_NET_CLS_CGROUP) |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 45 | static inline u32 task_cls_classid(struct task_struct *p) |
| 46 | { |
Daniel Wagner | 8a8e04d | 2012-09-12 16:12:07 +0200 | [diff] [blame^] | 47 | struct cgroup_subsys_state *css; |
Herbert Xu | ea16f91 | 2010-05-25 18:53:57 -0700 | [diff] [blame] | 48 | u32 classid = 0; |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 49 | |
| 50 | if (in_interrupt()) |
| 51 | return 0; |
| 52 | |
| 53 | rcu_read_lock(); |
Daniel Wagner | 8a8e04d | 2012-09-12 16:12:07 +0200 | [diff] [blame^] | 54 | css = task_subsys_state(p, net_cls_subsys_id); |
| 55 | if (css) |
| 56 | classid = container_of(css, |
Herbert Xu | f845172 | 2010-05-24 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 Wagner | 8fb974c | 2012-09-12 16:12:02 +0200 | [diff] [blame] | 63 | #else /* !CGROUP_NET_CLS_CGROUP */ |
Daniel Wagner | f341980 | 2012-09-12 16:12:01 +0200 | [diff] [blame] | 64 | static inline void sock_update_classid(struct sock *sk) |
| 65 | { |
| 66 | } |
| 67 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 68 | static inline u32 task_cls_classid(struct task_struct *p) |
| 69 | { |
| 70 | return 0; |
| 71 | } |
Daniel Wagner | 8fb974c | 2012-09-12 16:12:02 +0200 | [diff] [blame] | 72 | #endif /* CGROUP_NET_CLS_CGROUP */ |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 73 | #endif /* _NET_CLS_CGROUP_H */ |