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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5bc1421e34
This patch adds in the infrastructure code to create the network priority cgroup. The cgroup, in addition to the standard processes file creates two control files: 1) prioidx - This is a read-only file that exports the index of this cgroup. This is a value that is both arbitrary and unique to a cgroup in this subsystem, and is used to index the per-device priority map 2) priomap - This is a writeable file. On read it reports a table of 2-tuples <name:priority> where name is the name of a network interface and priority is indicates the priority assigned to frames egresessing on the named interface and originating from a pid in this cgroup This cgroup allows for skb priority to be set prior to a root qdisc getting selected. This is benenficial for DCB enabled systems, in that it allows for any application to use dcb configured priorities so without application modification Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> CC: Robert Love <robert.w.love@intel.com> CC: "David S. Miller" <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
66 lines
1.3 KiB
C
66 lines
1.3 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/module.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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struct cgroup_netprio_state
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{
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struct cgroup_subsys_state css;
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u32 prioidx;
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};
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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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#ifdef CONFIG_CGROUPS
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#ifndef CONFIG_NETPRIO_CGROUP
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extern int net_prio_subsys_id;
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#endif
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extern void sock_update_netprioidx(struct sock *sk);
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static inline struct cgroup_netprio_state
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*task_netprio_state(struct task_struct *p)
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{
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#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
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return container_of(task_subsys_state(p, net_prio_subsys_id),
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struct cgroup_netprio_state, css);
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#else
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return NULL;
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#endif
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}
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#else
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#define sock_update_netprioidx(sk)
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#define skb_update_prio(skb)
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static inline struct cgroup_netprio_state
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*task_netprio_state(struct task_struct *p)
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{
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return NULL;
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}
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#endif
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#endif /* _NET_CLS_CGROUP_H */
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