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netfilter: ctnetlink: support CTA_FILTER for flush

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From cb8aa9a, we can use kernel side filtering for dump, but
this capability is not available for flush.

This Patch allows advanced filter with CTA_FILTER for flush

Performace
1048576 ct flows in total, delete 50,000 flows by origin src ip
3.06s -> dump all, compare and delete
584ms -> directly flush with filter

Signed-off-by: Changliang Wu <changliang.wu@smartx.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Changliang Wu 2024-06-20 19:35:27 +08:00 committed by Pablo Neira Ayuso
parent 55ddb6c5a3
commit 1ef7f50ccc
1 changed files with 3 additions and 6 deletions
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9
net/netfilter/nf_conntrack_netlink.c
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@ -1579,9 +1579,6 @@ static int ctnetlink_flush_conntrack(struct net *net,
};
if (ctnetlink_needs_filter(family, cda)) {
if (cda[CTA_FILTER])
return -EOPNOTSUPP;
filter = ctnetlink_alloc_filter(cda, family);
if (IS_ERR(filter))
return PTR_ERR(filter);
@ -1610,14 +1607,14 @@ static int ctnetlink_del_conntrack(struct sk_buff *skb,
if (err < 0)
return err;
if (cda[CTA_TUPLE_ORIG])
if (cda[CTA_TUPLE_ORIG] && !cda[CTA_FILTER])
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
family, &zone);
else if (cda[CTA_TUPLE_REPLY])
else if (cda[CTA_TUPLE_REPLY] && !cda[CTA_FILTER])
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
family, &zone);
else {
u_int8_t u3 = info->nfmsg->version ? family : AF_UNSPEC;
u8 u3 = info->nfmsg->version || cda[CTA_FILTER] ? family : AF_UNSPEC;
return ctnetlink_flush_conntrack(info->net, cda,
NETLINK_CB(skb).portid,