include/net/netprio_cgroup.h

   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 #include <linux/module.h>
  17 #include <linux/cgroup.h>
  18 #include <linux/hardirq.h>
  19 #include <linux/rcupdate.h>
  20
  21 struct cgroup_netprio_state
  22 {
  23         struct cgroup_subsys_state css;
  24         u32 prioidx;
  25 };
  26
  27 struct netprio_map {
  28         struct rcu_head rcu;
  29         u32 priomap_len;
  30         u32 priomap[];
  31 };
  32
  33 #ifdef CONFIG_CGROUPS
  34
  35 #ifndef CONFIG_NETPRIO_CGROUP
  36 extern int net_prio_subsys_id;
  37 #endif
  38
  39 extern void sock_update_netprioidx(struct sock *sk);
  40
  41 static inline struct cgroup_netprio_state
  42                 *task_netprio_state(struct task_struct *p)
  43 {
  44 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
  45         return container_of(task_subsys_state(p, net_prio_subsys_id),
  46                             struct cgroup_netprio_state, css);
  47 #else
  48         return NULL;
  49 #endif
  50 }
  51
  52 #else
  53
  54 #define sock_update_netprioidx(sk)
  55 #define skb_update_prio(skb)
  56
  57 static inline struct cgroup_netprio_state
  58                 *task_netprio_state(struct task_struct *p)
  59 {
  60         return NULL;
  61 }
  62
  63 #endif
  64
  65 #endif  /* _NET_CLS_CGROUP_H */