diff options
| author | Florian Westphal <fw@strlen.de> | 2021-04-21 09:45:40 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-04-26 03:20:07 +0200 |
| commit | de8c12110a130337c8e7e7b8250de0580e644dee (patch) | |
| tree | 6cfc80f96c19a60753a15a99e906996e2f0b499c /net/netfilter/nf_conntrack_proto.c | |
| parent | e0bb96db96f8ca94349344a2ea7bebc6f8cefdae (diff) | |
netfilter: disable defrag once its no longer needed
When I changed defrag hooks to no longer get registered by default I
intentionally made it so that registration can only be un-done by unloading
the nf_defrag_ipv4/6 module.
In hindsight this was too conservative; there is no reason to keep defrag
on while there is no feature dependency anymore.
Moreover, this won't work if user isn't allowed to remove nf_defrag module.
This adds the disable() functions for both ipv4 and ipv6 and calls them
from conntrack, TPROXY and the xtables socket module.
ipvs isn't converted here, it will behave as before this patch and
will need module removal.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_conntrack_proto.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_proto.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 47e9319d2cf3..89e5bac384d7 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -536,15 +536,19 @@ static void nf_ct_netns_do_put(struct net *net, u8 nfproto) mutex_lock(&nf_ct_proto_mutex); switch (nfproto) { case NFPROTO_IPV4: - if (cnet->users4 && (--cnet->users4 == 0)) + if (cnet->users4 && (--cnet->users4 == 0)) { nf_unregister_net_hooks(net, ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); + nf_defrag_ipv4_disable(net); + } break; #if IS_ENABLED(CONFIG_IPV6) case NFPROTO_IPV6: - if (cnet->users6 && (--cnet->users6 == 0)) + if (cnet->users6 && (--cnet->users6 == 0)) { nf_unregister_net_hooks(net, ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); + nf_defrag_ipv6_disable(net); + } break; #endif case NFPROTO_BRIDGE: |