c749cdda90
use RCU instead of spin_{,un}lock_bh, to protect concurrent read/write on
act_skbedit configuration. This reduces the effects of contention in the
data path, in case multiple readers are present.
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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* Copyright (c) 2008, Intel Corporation.
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Duyck <alexander.h.duyck@intel.com>
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*/
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#ifndef __NET_TC_SKBEDIT_H
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#define __NET_TC_SKBEDIT_H
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#include <net/act_api.h>
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#include <linux/tc_act/tc_skbedit.h>
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struct tcf_skbedit_params {
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u32 flags;
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u32 priority;
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u32 mark;
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u32 mask;
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u16 queue_mapping;
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u16 ptype;
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struct rcu_head rcu;
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};
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struct tcf_skbedit {
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struct tc_action common;
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struct tcf_skbedit_params __rcu *params;
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};
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#define to_skbedit(a) ((struct tcf_skbedit *)a)
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/* Return true iff action is mark */
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static inline bool is_tcf_skbedit_mark(const struct tc_action *a)
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{
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#ifdef CONFIG_NET_CLS_ACT
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u32 flags;
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if (a->ops && a->ops->type == TCA_ACT_SKBEDIT) {
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rcu_read_lock();
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flags = rcu_dereference(to_skbedit(a)->params)->flags;
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rcu_read_unlock();
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return flags == SKBEDIT_F_MARK;
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}
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#endif
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return false;
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}
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static inline u32 tcf_skbedit_mark(const struct tc_action *a)
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{
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u32 mark;
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rcu_read_lock();
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mark = rcu_dereference(to_skbedit(a)->params)->mark;
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rcu_read_unlock();
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return mark;
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}
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#endif /* __NET_TC_SKBEDIT_H */
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