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/*
* netprio_cgroup.h Control Group Priority set
*
*
* Authors: Neil Horman <nhorman@tuxdriver.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _NETPRIO_CGROUP_H
#define _NETPRIO_CGROUP_H
#include <linux/cgroup.h>
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
struct netprio_map {
struct rcu_head rcu;
u32 priomap_len;
u32 priomap[];
};
struct cgroup_netprio_state {
struct cgroup_subsys_state css;
u32 prioidx;
};
#ifndef CONFIG_NETPRIO_CGROUP
extern int net_prio_subsys_id;
#endif
extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
static inline u32 task_netprioidx(struct task_struct *p)
{
struct cgroup_netprio_state *state;
u32 idx;
rcu_read_lock();
state = container_of(task_subsys_state(p, net_prio_subsys_id),
struct cgroup_netprio_state, css);
idx = state->prioidx;
rcu_read_unlock();
return idx;
}
#elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
static inline u32 task_netprioidx(struct task_struct *p)
{
struct cgroup_netprio_state *state;
int subsys_id;
u32 idx = 0;
rcu_read_lock();
subsys_id = rcu_dereference_index_check(net_prio_subsys_id,
rcu_read_lock_held());
if (subsys_id >= 0) {
state = container_of(task_subsys_state(p, subsys_id),
struct cgroup_netprio_state, css);
idx = state->prioidx;
}
rcu_read_unlock();
return idx;
}
#endif
#else /* !CONFIG_NETPRIO_CGROUP */
static inline u32 task_netprioidx(struct task_struct *p)
{
return 0;
}
#define sock_update_netprioidx(sk, task)
#endif /* CONFIG_NETPRIO_CGROUP */
#endif /* _NET_CLS_CGROUP_H */
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