linux/include/net/netprio_cgroup.h
Tejun Heo 88d642fa2c netprio_cgroup: use cgroup->id instead of cgroup_netprio_state->prioidx
With priomap expansion no longer depending on knowing max id
allocated, netprio_cgroup can use cgroup->id insted of cs->prioidx.
Drop prioidx alloc/free logic and convert all uses to cgroup->id.

* In cgrp_css_alloc(), parent->id test is moved above @cs allocation
  to simplify error path.

* In cgrp_css_free(), @cs assignment is made initialization.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Tested-and-Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Acked-by: David S. Miller <davem@davemloft.net>
2012-11-22 07:32:47 -08:00

76 lines
1.5 KiB
C

/*
* 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;
};
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_subsys_state *css;
u32 idx;
rcu_read_lock();
css = task_subsys_state(p, net_prio_subsys_id);
idx = css->cgroup->id;
rcu_read_unlock();
return idx;
}
#elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
static inline u32 task_netprioidx(struct task_struct *p)
{
struct cgroup_subsys_state *css;
u32 idx = 0;
rcu_read_lock();
css = task_subsys_state(p, net_prio_subsys_id);
if (css)
idx = css->cgroup->id;
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 */