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         u32 prioidx;
  31 };
  32
  33 extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
  34
  35 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
  36
  37 static inline u32 task_netprioidx(struct task_struct *p)
  38 {
  39         struct cgroup_netprio_state *state;
  40         u32 idx;
  41
  42         rcu_read_lock();
  43         state = container_of(task_subsys_state(p, net_prio_subsys_id),
  44                              struct cgroup_netprio_state, css);
  45         idx = state->prioidx;
  46         rcu_read_unlock();
  47         return idx;
  48 }
  49
  50 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
  51
  52 static inline u32 task_netprioidx(struct task_struct *p)
  53 {
  54         struct cgroup_subsys_state *css;
  55         u32 idx = 0;
  56
  57         rcu_read_lock();
  58         css = task_subsys_state(p, net_prio_subsys_id);
  59         if (css)
  60                 idx = container_of(css,
  61                                    struct cgroup_netprio_state, css)->prioidx;
  62         rcu_read_unlock();
  63         return idx;
  64 }
  65 #endif
  66
  67 #else /* !CONFIG_NETPRIO_CGROUP */
  68
  69 static inline u32 task_netprioidx(struct task_struct *p)
  70 {
  71         return 0;
  72 }
  73
  74 #define sock_update_netprioidx(sk, task)
  75
  76 #endif /* CONFIG_NETPRIO_CGROUP */
  77
  78 #endif  /* _NET_CLS_CGROUP_H */