Commit 9b7c68b3 authored Mar 22, 2023 by Paul Blakey Committed by Florian Westphal Mar 30, 2023

netfilter: ctnetlink: Support offloaded conntrack entry deletion



Currently, offloaded conntrack entries (flows) can only be deleted
after they are removed from offload, which is either by timeout,
tcp state change or tc ct rule deletion. This can cause issues for
users wishing to manually delete or flush existing entries.

Support deletion of offloaded conntrack entries.

Example usage:
 # Delete all offloaded (and non offloaded) conntrack entries
 # whose source address is 1.2.3.4
 $ conntrack -D -s 1.2.3.4
 # Delete all entries
 $ conntrack -F

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>

parent a25b8b71

net/netfilter/nf_conntrack_netlink.c

+0 −8

Original line number	Diff line number	Diff line
		@@ -1554,9 +1554,6 @@ static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {

		static int ctnetlink_flush_iterate(struct nf_conn ct, void data)
		{
		if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
		return 0;

		return ctnetlink_filter_match(ct, data);
		}

		@@ -1626,11 +1623,6 @@ static int ctnetlink_del_conntrack(struct sk_buff *skb,

		ct = nf_ct_tuplehash_to_ctrack(h);

		if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) {
		nf_ct_put(ct);
		return -EBUSY;
		}

		if (cda[CTA_ID]) {
		__be32 id = nla_get_be32(cda[CTA_ID]);