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
21struct cgroup_cls_state
22{
23	struct cgroup_subsys_state css;
24	u32 classid;
25};
26
27#ifdef CONFIG_NET_CLS_CGROUP
28static 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
43extern int net_cls_subsys_id;
44
45static 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
65static inline u32 task_cls_classid(struct task_struct *p)
66{
67	return 0;
68}
69#endif
70#endif  /* _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
21struct cgroup_cls_state
22{
23	struct cgroup_subsys_state css;
24	u32 classid;
25};
26
27#ifdef CONFIG_NET_CLS_CGROUP
28static 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
43extern int net_cls_subsys_id;
44
45static 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
65static inline u32 task_cls_classid(struct task_struct *p)
66{
67	return 0;
68}
69#endif
70#endif  /* _NET_CLS_CGROUP_H */