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88d642fa2c
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>
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
/*
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* netprio_cgroup.h Control Group Priority set
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*
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*
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* Authors: Neil Horman <nhorman@tuxdriver.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _NETPRIO_CGROUP_H
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#define _NETPRIO_CGROUP_H
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#include <linux/cgroup.h>
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#include <linux/hardirq.h>
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#include <linux/rcupdate.h>
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#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
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struct netprio_map {
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struct rcu_head rcu;
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u32 priomap_len;
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u32 priomap[];
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};
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struct cgroup_netprio_state {
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struct cgroup_subsys_state css;
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};
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extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
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#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
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static inline u32 task_netprioidx(struct task_struct *p)
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{
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struct cgroup_subsys_state *css;
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u32 idx;
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rcu_read_lock();
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css = task_subsys_state(p, net_prio_subsys_id);
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idx = css->cgroup->id;
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rcu_read_unlock();
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return idx;
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}
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#elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
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static inline u32 task_netprioidx(struct task_struct *p)
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{
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struct cgroup_subsys_state *css;
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u32 idx = 0;
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rcu_read_lock();
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css = task_subsys_state(p, net_prio_subsys_id);
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if (css)
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idx = css->cgroup->id;
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rcu_read_unlock();
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return idx;
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}
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#endif
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#else /* !CONFIG_NETPRIO_CGROUP */
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static inline u32 task_netprioidx(struct task_struct *p)
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{
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return 0;
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}
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#define sock_update_netprioidx(sk, task)
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#endif /* CONFIG_NETPRIO_CGROUP */
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#endif /* _NET_CLS_CGROUP_H */
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