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Linux/include/net/netprio_cgroup.h

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  1 /*
  2  * netprio_cgroup.h                     Control Group Priority set
  3  *
  4  *
  5  * Authors:     Neil Horman <nhorman@tuxdriver.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License as published by the Free
  9  * Software Foundation; either version 2 of the License, or (at your option)
 10  * any later version.
 11  *
 12  */
 13 
 14 #ifndef _NETPRIO_CGROUP_H
 15 #define _NETPRIO_CGROUP_H
 16 
 17 #include <linux/cgroup.h>
 18 #include <linux/hardirq.h>
 19 #include <linux/rcupdate.h>
 20 
 21 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
 22 struct netprio_map {
 23         struct rcu_head rcu;
 24         u32 priomap_len;
 25         u32 priomap[];
 26 };
 27 
 28 static inline u32 task_netprioidx(struct task_struct *p)
 29 {
 30         struct cgroup_subsys_state *css;
 31         u32 idx;
 32 
 33         rcu_read_lock();
 34         css = task_css(p, net_prio_cgrp_id);
 35         idx = css->cgroup->id;
 36         rcu_read_unlock();
 37         return idx;
 38 }
 39 
 40 static inline void sock_update_netprioidx(struct sock_cgroup_data *skcd)
 41 {
 42         if (in_interrupt())
 43                 return;
 44 
 45         sock_cgroup_set_prioidx(skcd, task_netprioidx(current));
 46 }
 47 
 48 #else /* !CONFIG_CGROUP_NET_PRIO */
 49 
 50 static inline u32 task_netprioidx(struct task_struct *p)
 51 {
 52         return 0;
 53 }
 54 
 55 static inline void sock_update_netprioidx(struct sock_cgroup_data *skcd)
 56 {
 57 }
 58 
 59 #endif /* CONFIG_CGROUP_NET_PRIO */
 60 #endif  /* _NET_CLS_CGROUP_H */
 61 

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