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sunvnet: use icmp_ndo_send helper

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Because sunvnet is calling icmp from network device context, it should use
the ndo helper so that the rate limiting applies correctly. While we're
at it, doing the additional route lookup before calling icmp_ndo_send is
superfluous, since this is the job of the icmp code in the first place.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason A. Donenfeld 2020-02-11 20:47:07 +01:00 committed by David S. Miller
parent e0fce6f945
commit 67c9a7e1e3
1 changed files with 4 additions and 19 deletions
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23
drivers/net/ethernet/sun/sunvnet_common.c
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@ -1350,27 +1350,12 @@ sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
if (vio_version_after_eq(&port->vio, 1, 3))
localmtu -= VLAN_HLEN;
if (skb->protocol == htons(ETH_P_IP)) {
struct flowi4 fl4;
struct rtable *rt = NULL;
memset(&fl4, 0, sizeof(fl4));
fl4.flowi4_oif = dev->ifindex;
fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos);
fl4.daddr = ip_hdr(skb)->daddr;
fl4.saddr = ip_hdr(skb)->saddr;
rt = ip_route_output_key(dev_net(dev), &fl4);
if (!IS_ERR(rt)) {
skb_dst_set(skb, &rt->dst);
icmp_send(skb, ICMP_DEST_UNREACH,
ICMP_FRAG_NEEDED,
htonl(localmtu));
}
}
if (skb->protocol == htons(ETH_P_IP))
icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
htonl(localmtu));
#if IS_ENABLED(CONFIG_IPV6)
else if (skb->protocol == htons(ETH_P_IPV6))
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
#endif
goto out_dropped;
}