From ac03694bc009703022cf45a9c90675d5505c584c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 16 Feb 2023 16:28:42 +0000 Subject: ipv6: icmp6: add drop reason support to icmpv6_echo_reply() Change icmpv6_echo_reply() to return a drop reason. For the moment, return NOT_SPECIFIED or SKB_CONSUMED. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/icmp.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'net/ipv6/icmp.c') diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index f32bc98155bf..1f53f2a74480 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -705,7 +705,7 @@ int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type, } EXPORT_SYMBOL(ip6_err_gen_icmpv6_unreach); -static void icmpv6_echo_reply(struct sk_buff *skb) +static enum skb_drop_reason icmpv6_echo_reply(struct sk_buff *skb) { struct net *net = dev_net(skb->dev); struct sock *sk; @@ -719,18 +719,19 @@ static void icmpv6_echo_reply(struct sk_buff *skb) struct dst_entry *dst; struct ipcm6_cookie ipc6; u32 mark = IP6_REPLY_MARK(net, skb->mark); + SKB_DR(reason); bool acast; u8 type; if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) && net->ipv6.sysctl.icmpv6_echo_ignore_multicast) - return; + return reason; saddr = &ipv6_hdr(skb)->daddr; acast = ipv6_anycast_destination(skb_dst(skb), saddr); if (acast && net->ipv6.sysctl.icmpv6_echo_ignore_anycast) - return; + return reason; if (!ipv6_unicast_destination(skb) && !(net->ipv6.sysctl.anycast_src_echo_reply && acast)) @@ -804,6 +805,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb) } else { icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr, skb->len + sizeof(struct icmp6hdr)); + reason = SKB_CONSUMED; } out_dst_release: dst_release(dst); @@ -811,6 +813,7 @@ out: icmpv6_xmit_unlock(sk); out_bh_enable: local_bh_enable(); + return reason; } enum skb_drop_reason icmpv6_notify(struct sk_buff *skb, u8 type, @@ -929,12 +932,12 @@ static int icmpv6_rcv(struct sk_buff *skb) switch (type) { case ICMPV6_ECHO_REQUEST: if (!net->ipv6.sysctl.icmpv6_echo_ignore_all) - icmpv6_echo_reply(skb); + reason = icmpv6_echo_reply(skb); break; case ICMPV6_EXT_ECHO_REQUEST: if (!net->ipv6.sysctl.icmpv6_echo_ignore_all && READ_ONCE(net->ipv4.sysctl_icmp_echo_enable_probe)) - icmpv6_echo_reply(skb); + reason = icmpv6_echo_reply(skb); break; case ICMPV6_ECHO_REPLY: -- cgit