git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| f8451725 HX |
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 | #ifdef CONFIG_CGROUPS | |
| 21 | struct cgroup_cls_state | |
| 22 | { | |
| 23 | struct cgroup_subsys_state css; | |
| 24 | u32 classid; | |
| 25 | }; | |
| 26 | ||
| 27 | #ifdef CONFIG_NET_CLS_CGROUP | |
| 28 | static inline u32 task_cls_classid(struct task_struct *p) | |
| 29 | { | |
| 3fb5a991 LZ |
30 | int classid; |
| 31 | ||
| f8451725 HX |
32 | if (in_interrupt()) |
| 33 | return 0; | |
| 34 | ||
| 3fb5a991 LZ |
35 | rcu_read_lock(); |
| 36 | classid = container_of(task_subsys_state(p, net_cls_subsys_id), | |
| 37 | struct cgroup_cls_state, css)->classid; | |
| 38 | rcu_read_unlock(); | |
| 39 | ||
| 40 | return classid; | |
| f8451725 HX |
41 | } |
| 42 | #else | |
| 43 | extern int net_cls_subsys_id; | |
| 44 | ||
| 45 | static inline u32 task_cls_classid(struct task_struct *p) | |
| 46 | { | |
| 47 | int id; | |
| ea16f912 | 48 | u32 classid = 0; |
| f8451725 HX |
49 | |
| 50 | if (in_interrupt()) | |
| 51 | return 0; | |
| 52 | ||
| 53 | rcu_read_lock(); | |
| 54 | id = rcu_dereference(net_cls_subsys_id); | |
| 55 | if (id >= 0) | |
| 56 | classid = container_of(task_subsys_state(p, id), | |
| 57 | struct cgroup_cls_state, css)->classid; | |
| 58 | rcu_read_unlock(); | |
| 59 | ||
| 60 | return classid; | |
| 61 | } | |
| 62 | #endif | |
| 63 | #else | |
| 64 | static inline u32 task_cls_classid(struct task_struct *p) | |
| 65 | { | |
| 66 | return 0; | |
| 67 | } | |
| 68 | #endif | |
| 69 | #endif /* _NET_CLS_CGROUP_H */ |