forked from Minki/linux
762f926d6f
Currently, tcf_ct_flow_table_restore_skb is exported by act_ct
module, therefore modules using it will have hard-dependency
on act_ct and will require loading it all the time.
This can lead to an unnecessary overhead on systems that do not
use hardware connection tracking action (ct_metadata action) in
the first place.
To relax the hard-dependency between the modules, we unexport this
function and make it a static inline one.
Fixes: 30b0cf90c6 ("net/sched: act_ct: Support restoring conntrack info on skbs")
Signed-off-by: Alaa Hleihel <alaa@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_TC_CT_H
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#define __NET_TC_CT_H
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#include <net/act_api.h>
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#include <uapi/linux/tc_act/tc_ct.h>
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#if IS_ENABLED(CONFIG_NF_CONNTRACK)
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#include <net/netfilter/nf_nat.h>
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#include <net/netfilter/nf_conntrack_labels.h>
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struct tcf_ct_params {
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struct nf_conn *tmpl;
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u16 zone;
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u32 mark;
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u32 mark_mask;
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u32 labels[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
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u32 labels_mask[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
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struct nf_nat_range2 range;
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bool ipv4_range;
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u16 ct_action;
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struct rcu_head rcu;
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struct tcf_ct_flow_table *ct_ft;
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struct nf_flowtable *nf_ft;
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};
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struct tcf_ct {
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struct tc_action common;
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struct tcf_ct_params __rcu *params;
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};
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#define to_ct(a) ((struct tcf_ct *)a)
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#define to_ct_params(a) \
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((struct tcf_ct_params *) \
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rcu_dereference_protected(to_ct(a)->params, \
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lockdep_is_held(&a->tcfa_lock)))
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static inline uint16_t tcf_ct_zone(const struct tc_action *a)
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{
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return to_ct_params(a)->zone;
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}
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static inline int tcf_ct_action(const struct tc_action *a)
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{
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return to_ct_params(a)->ct_action;
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}
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static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
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{
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return to_ct_params(a)->nf_ft;
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}
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#else
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static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
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static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
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static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
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{
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return NULL;
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}
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#endif /* CONFIG_NF_CONNTRACK */
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#if IS_ENABLED(CONFIG_NET_ACT_CT)
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static inline void
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tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie)
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{
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enum ip_conntrack_info ctinfo = cookie & NFCT_INFOMASK;
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struct nf_conn *ct;
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ct = (struct nf_conn *)(cookie & NFCT_PTRMASK);
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nf_conntrack_get(&ct->ct_general);
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nf_ct_set(skb, ct, ctinfo);
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}
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#else
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static inline void
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tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { }
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#endif
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static inline bool is_tcf_ct(const struct tc_action *a)
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{
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#if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
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if (a->ops && a->ops->id == TCA_ID_CT)
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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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#endif /* __NET_TC_CT_H */
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