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 struct cgroup_netprio_state {
  29         struct cgroup_subsys_state css;
  30 };
  31
  32 extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
  33
  34 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
  35
  36 static inline u32 task_netprioidx(struct task_struct *p)
  37 {
  38         struct cgroup_subsys_state *css;
  39         u32 idx;
  40
  41         rcu_read_lock();
  42         css = task_subsys_state(p, net_prio_subsys_id);
  43         idx = css->cgroup->id;
  44         rcu_read_unlock();
  45         return idx;
  46 }
  47
  48 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
  49
  50 static inline u32 task_netprioidx(struct task_struct *p)
  51 {
  52         struct cgroup_subsys_state *css;
  53         u32 idx = 0;
  54
  55         rcu_read_lock();
  56         css = task_subsys_state(p, net_prio_subsys_id);
  57         if (css)
  58                 idx = css->cgroup->id;
  59         rcu_read_unlock();
  60         return idx;
  61 }
  62 #endif
  63
  64 #else /* !CONFIG_NETPRIO_CGROUP */
  65
  66 static inline u32 task_netprioidx(struct task_struct *p)
  67 {
  68         return 0;
  69 }
  70
  71 #define sock_update_netprioidx(sk, task)
  72
  73 #endif /* CONFIG_NETPRIO_CGROUP */
  74
  75 #endif  /* _NET_CLS_CGROUP_H */