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#include <linux/cgroup.h>
  17#include <linux/hardirq.h>
  18#include <linux/rcupdate.h>
  19
  20
  21#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
  22struct netprio_map {
  23        struct rcu_head rcu;
  24        u32 priomap_len;
  25        u32 priomap[];
  26};
  27
  28struct cgroup_netprio_state {
  29        struct cgroup_subsys_state css;
  30        u32 prioidx;
  31};
  32
  33extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
  34
  35#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
  36
  37static 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
  52static 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
  69static 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 */
  79
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