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4c5b9d9642
Using a spinlock in the VLAN action causes performance issues when the VLAN action is used on multiple cores. Rewrote the VLAN action to use RCU read locking for reads and updates instead. All functions now use an RCU dereferenced pointer to access the VLAN action context. Modified helper functions used by other modules, to use the RCU as opposed to directly accessing the structure. Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Manish Kurup <manish.kurup@verizon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
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* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __NET_TC_VLAN_H
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#define __NET_TC_VLAN_H
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#include <net/act_api.h>
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#include <linux/tc_act/tc_vlan.h>
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struct tcf_vlan_params {
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int tcfv_action;
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u16 tcfv_push_vid;
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__be16 tcfv_push_proto;
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u8 tcfv_push_prio;
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struct rcu_head rcu;
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};
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struct tcf_vlan {
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struct tc_action common;
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struct tcf_vlan_params __rcu *vlan_p;
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};
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#define to_vlan(a) ((struct tcf_vlan *)a)
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static inline bool is_tcf_vlan(const struct tc_action *a)
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{
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#ifdef CONFIG_NET_CLS_ACT
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if (a->ops && a->ops->type == TCA_ACT_VLAN)
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return true;
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#endif
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return false;
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}
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static inline u32 tcf_vlan_action(const struct tc_action *a)
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{
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u32 tcfv_action;
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rcu_read_lock();
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tcfv_action = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_action;
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rcu_read_unlock();
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return tcfv_action;
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}
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static inline u16 tcf_vlan_push_vid(const struct tc_action *a)
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{
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u16 tcfv_push_vid;
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rcu_read_lock();
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tcfv_push_vid = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_vid;
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rcu_read_unlock();
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return tcfv_push_vid;
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}
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static inline __be16 tcf_vlan_push_proto(const struct tc_action *a)
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{
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__be16 tcfv_push_proto;
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rcu_read_lock();
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tcfv_push_proto = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_proto;
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rcu_read_unlock();
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return tcfv_push_proto;
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}
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static inline u8 tcf_vlan_push_prio(const struct tc_action *a)
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{
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u8 tcfv_push_prio;
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rcu_read_lock();
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tcfv_push_prio = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_prio;
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rcu_read_unlock();
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return tcfv_push_prio;
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}
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#endif /* __NET_TC_VLAN_H */
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