378307217e
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
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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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#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
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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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void sock_update_classid(struct sock *sk);
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#if IS_BUILTIN(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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u32 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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#elif IS_MODULE(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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struct cgroup_subsys_state *css;
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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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css = task_subsys_state(p, net_cls_subsys_id);
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if (css)
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classid = container_of(css,
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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 /* !CGROUP_NET_CLS_CGROUP */
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static inline void sock_update_classid(struct sock *sk)
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{
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}
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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 /* CGROUP_NET_CLS_CGROUP */
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#endif /* _NET_CLS_CGROUP_H */
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