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/cgroup.h>
  17 #include <linux/hardirq.h>
  18 #include <linux/rcupdate.h>
  19
  20
  21 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
  22 struct netprio_map {
  23         struct rcu_head rcu;
  24         u32 priomap_len;
  25         u32 priomap[];
  26 };
  27
  28 void sock_update_netprioidx(struct sock *sk);
  29
  30 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
  31
  32 static inline u32 task_netprioidx(struct task_struct *p)
  33 {
  34         struct cgroup_subsys_state *css;
  35         u32 idx;
  36
  37         rcu_read_lock();
  38         css = task_css(p, net_prio_subsys_id);
  39         idx = css->cgroup->id;
  40         rcu_read_unlock();
  41         return idx;
  42 }
  43
  44 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
  45
  46 static inline u32 task_netprioidx(struct task_struct *p)
  47 {
  48         struct cgroup_subsys_state *css;
  49         u32 idx = 0;
  50
  51         rcu_read_lock();
  52         css = task_css(p, net_prio_subsys_id);
  53         if (css)
  54                 idx = css->cgroup->id;
  55         rcu_read_unlock();
  56         return idx;
  57 }
  58 #endif
  59
  60 #else /* !CONFIG_NETPRIO_CGROUP */
  61
  62 static inline u32 task_netprioidx(struct task_struct *p)
  63 {
  64         return 0;
  65 }
  66
  67 #define sock_update_netprioidx(sk)
  68
  69 #endif /* CONFIG_NETPRIO_CGROUP */
  70
  71 #endif  /* _NET_CLS_CGROUP_H */