Hello,
On Tue, 12 Oct 2021, Florian Westphal wrote:
> Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
> ---
> net/netfilter/ipvs/ip_vs_core.c | 37 +++++++++++++--------------------
> 1 file changed, 14 insertions(+), 23 deletions(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
> index ad5f5e50547f..c43b1eb61580 100644
> --- a/net/netfilter/ipvs/ip_vs_core.c
> +++ b/net/netfilter/ipvs/ip_vs_core.c
> @@ -2106,40 +2106,31 @@ static unsigned int
> ip_vs_forward_icmp(void *priv, struct sk_buff *skb,
> const struct nf_hook_state *state)
> {
> - int r;
> struct netns_ipvs *ipvs = net_ipvs(state->net);
> -
> - if (ip_hdr(skb)->protocol != IPPROTO_ICMP)
> - return NF_ACCEPT;
> + int r;
>
> /* ipvs enabled in this netns ? */
> if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable))
> return NF_ACCEPT;
>
> - return ip_vs_in_icmp(ipvs, skb, &r, state->hook);
> -}
> -
> + if (state->pf == NFPROTO_IPV4 &&
> + ip_hdr(skb)->protocol != IPPROTO_ICMP) {
> + return NF_ACCEPT;
Can we split the above checks?:
if (state->pf == NFPROTO_IPV4) {
if (ip_hdr(skb)->protocol != IPPROTO_ICMP) {
return NF_ACCEPT;
} else {
#ifdef ...
We don't want to call ip_vs_fill_iph_skb for IPv4
when IPPROTO_ICMP. Patches 1-3 look ok.
> #ifdef CONFIG_IP_VS_IPV6
> -static unsigned int
> -ip_vs_forward_icmp_v6(void *priv, struct sk_buff *skb,
> - const struct nf_hook_state *state)
> -{
> - int r;
> - struct netns_ipvs *ipvs = net_ipvs(state->net);
> - struct ip_vs_iphdr iphdr;
> + } else {
> + struct ip_vs_iphdr iphdr;
>
> - ip_vs_fill_iph_skb(AF_INET6, skb, false, &iphdr);
> - if (iphdr.protocol != IPPROTO_ICMPV6)
> - return NF_ACCEPT;
> + ip_vs_fill_iph_skb(AF_INET6, skb, false, &iphdr);
>
> - /* ipvs enabled in this netns ? */
> - if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable))
> - return NF_ACCEPT;
> + if (iphdr.protocol != IPPROTO_ICMPV6)
> + return NF_ACCEPT;
>
> - return ip_vs_in_icmp_v6(ipvs, skb, &r, state->hook, &iphdr);
> -}
> + return ip_vs_in_icmp_v6(ipvs, skb, &r, state->hook, &iphdr);
> #endif
> + }
>
> + return ip_vs_in_icmp(ipvs, skb, &r, state->hook);
> +}
>
> static const struct nf_hook_ops ip_vs_ops4[] = {
> /* After packet filtering, change source only for VS/NAT */
> @@ -2224,7 +2215,7 @@ static const struct nf_hook_ops ip_vs_ops6[] = {
> /* After packet filtering (but before ip_vs_out_icmp), catch icmp
> * destined for 0.0.0.0/0, which is for incoming IPVS connections */
> {
> - .hook = ip_vs_forward_icmp_v6,
> + .hook = ip_vs_forward_icmp,
> .pf = NFPROTO_IPV6,
> .hooknum = NF_INET_FORWARD,
> .priority = 99,
> --
> 2.32.0
Regards
--
Julian Anastasov <ja@xxxxxx>
