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netfilter: conntrack: handle ->destroy hook via nat_ops instead

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The nat module already exposes a few functions to the conntrack core.
Move the nat extension destroy hook to it.

After this, no conntrack extension needs a destroy hook.
'struct nf_ct_ext_type' and the register/unregister api can be removed
in a followup patch.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2022-01-20 13:07:01 +01:00 • committed by Pablo Neira Ayuso
parent 5f31edc067
commit 1bc91a5ddf
5 changed files with 16 additions and 36 deletions
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include/linux/netfilter.h
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@ -379,6 +379,7 @@ struct nf_nat_hook {
unsigned int (*manip_pkt)(struct sk_buff *skb, struct nf_conn *ct,
enum nf_nat_manip_type mtype,
enum ip_conntrack_dir dir);
void (*remove_nat_bysrc)(struct nf_conn *ct);
};
extern const struct nf_nat_hook __rcu *nf_nat_hook;