irq_domain: Move irq_virq_count into NOMAP revmap
[linux-2.6.git] / include / net / cls_cgroup.h
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 {
30         int classid;
31
32         if (in_interrupt())
33                 return 0;
34
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;
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;
48         u32 classid = 0;
49
50         if (in_interrupt())
51                 return 0;
52
53         rcu_read_lock();
54         id = rcu_dereference_index_check(net_cls_subsys_id,
55                                          rcu_read_lock_held());
56         if (id >= 0)
57                 classid = container_of(task_subsys_state(p, id),
58                                        struct cgroup_cls_state, css)->classid;
59         rcu_read_unlock();
60
61         return classid;
62 }
63 #endif
64 #else
65 static inline u32 task_cls_classid(struct task_struct *p)
66 {
67         return 0;
68 }
69 #endif
70 #endif  /* _NET_CLS_CGROUP_H */