include/net/netprio_cgroup.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * netprio_cgroup.h                     Control Group Priority set
   4  *
   5  * Authors:     Neil Horman <nhorman@tuxdriver.com>
   6  */
   7
   8 #ifndef _NETPRIO_CGROUP_H
   9 #define _NETPRIO_CGROUP_H
  10
  11 #include <linux/cgroup.h>
  12 #include <linux/hardirq.h>
  13 #include <linux/rcupdate.h>
  14
  15 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
  16 struct netprio_map {
  17         struct rcu_head rcu;
  18         u32 priomap_len;
  19         u32 priomap[];
  20 };
  21
  22 static inline u32 task_netprioidx(struct task_struct *p)
  23 {
  24         struct cgroup_subsys_state *css;
  25         u32 idx;
  26
  27         rcu_read_lock();
  28         css = task_css(p, net_prio_cgrp_id);
  29         idx = css->cgroup->id;
  30         rcu_read_unlock();
  31         return idx;
  32 }
  33
  34 static inline void sock_update_netprioidx(struct sock_cgroup_data *skcd)
  35 {
  36         if (in_interrupt())
  37                 return;
  38
  39         sock_cgroup_set_prioidx(skcd, task_netprioidx(current));
  40 }
  41
  42 #else /* !CONFIG_CGROUP_NET_PRIO */
  43
  44 static inline u32 task_netprioidx(struct task_struct *p)
  45 {
  46         return 0;
  47 }
  48
  49 static inline void sock_update_netprioidx(struct sock_cgroup_data *skcd)
  50 {
  51 }
  52
  53 #endif /* CONFIG_CGROUP_NET_PRIO */
  54 #endif  /* _NET_CLS_CGROUP_H */