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Viewing changes to include/net/cls_cgroup.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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include/net/cls_cgroup.h
 
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/*
 
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 * cls_cgroup.h                 Control Group Classifier
 
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 *
 
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 * Authors:     Thomas Graf <tgraf@suug.ch>
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify it
 
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 * under the terms of the GNU General Public License as published by the Free
 
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 * Software Foundation; either version 2 of the License, or (at your option)
 
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 * any later version.
 
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 *
 
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 */
 
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#ifndef _NET_CLS_CGROUP_H
 
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#define _NET_CLS_CGROUP_H
 
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#include <linux/cgroup.h>
 
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#include <linux/hardirq.h>
 
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#include <linux/rcupdate.h>
 
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#ifdef CONFIG_CGROUPS
 
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struct cgroup_cls_state
 
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{
 
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        struct cgroup_subsys_state css;
 
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        u32 classid;
 
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};
 
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#ifdef CONFIG_NET_CLS_CGROUP
 
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static inline u32 task_cls_classid(struct task_struct *p)
 
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{
 
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        int classid;
 
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        if (in_interrupt())
 
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                return 0;
 
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        rcu_read_lock();
 
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        classid = container_of(task_subsys_state(p, net_cls_subsys_id),
 
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                               struct cgroup_cls_state, css)->classid;
 
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        rcu_read_unlock();
 
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        return classid;
 
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}
 
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#else
 
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extern int net_cls_subsys_id;
 
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static inline u32 task_cls_classid(struct task_struct *p)
 
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{
 
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        int id;
 
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        u32 classid = 0;
 
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        if (in_interrupt())
 
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                return 0;
 
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        rcu_read_lock();
 
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        id = rcu_dereference_index_check(net_cls_subsys_id,
 
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                                         rcu_read_lock_held());
 
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        if (id >= 0)
 
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                classid = container_of(task_subsys_state(p, id),
 
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                                       struct cgroup_cls_state, css)->classid;
 
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        rcu_read_unlock();
 
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        return classid;
 
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}
 
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#endif
 
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#else
 
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static inline u32 task_cls_classid(struct task_struct *p)
 
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{
 
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        return 0;
 
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}
 
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#endif
 
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#endif  /* _NET_CLS_CGROUP_H */