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9795ded7f9
Driver offloading ct tuples can use the information of which devices received the packets that created the offloaded connections, to more efficiently offload them only to the relevant device. Add new act_ct nf conntrack extension, which is used to store the skb devices before offloading the connection, and then fill in the tuple iifindex so drivers can get the device via metadata dissector match. Signed-off-by: Oz Shlomo <ozsh@nvidia.com> Signed-off-by: Paul Blakey <paulb@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NF_CONNTRACK_ACT_CT_H
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#define _NF_CONNTRACK_ACT_CT_H
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#include <net/netfilter/nf_conntrack.h>
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#include <linux/netfilter/nf_conntrack_common.h>
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#include <net/netfilter/nf_conntrack_extend.h>
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struct nf_conn_act_ct_ext {
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int ifindex[IP_CT_DIR_MAX];
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};
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static inline struct nf_conn_act_ct_ext *nf_conn_act_ct_ext_find(const struct nf_conn *ct)
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{
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#if IS_ENABLED(CONFIG_NET_ACT_CT)
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return nf_ct_ext_find(ct, NF_CT_EXT_ACT_CT);
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#else
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return NULL;
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#endif
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}
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static inline struct nf_conn_act_ct_ext *nf_conn_act_ct_ext_add(struct nf_conn *ct)
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{
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#if IS_ENABLED(CONFIG_NET_ACT_CT)
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struct nf_conn_act_ct_ext *act_ct = nf_ct_ext_find(ct, NF_CT_EXT_ACT_CT);
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if (act_ct)
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return act_ct;
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act_ct = nf_ct_ext_add(ct, NF_CT_EXT_ACT_CT, GFP_ATOMIC);
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return act_ct;
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#else
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return NULL;
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#endif
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}
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static inline void nf_conn_act_ct_ext_fill(struct sk_buff *skb, struct nf_conn *ct,
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enum ip_conntrack_info ctinfo)
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{
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#if IS_ENABLED(CONFIG_NET_ACT_CT)
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struct nf_conn_act_ct_ext *act_ct_ext;
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act_ct_ext = nf_conn_act_ct_ext_find(ct);
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if (dev_net(skb->dev) == &init_net && act_ct_ext)
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act_ct_ext->ifindex[CTINFO2DIR(ctinfo)] = skb->dev->ifindex;
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#endif
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}
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#endif /* _NF_CONNTRACK_ACT_CT_H */
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