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net: Align ip_multipath_l3_keys and ip6_multipath_l3_keys

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Symmetry is good and allows easy comparison that ipv4 and ipv6 are
doing the same thing. To that end, change ip_multipath_l3_keys to
set addresses at the end after the icmp compares, and move the
initialization of ipv6 flow keys to rt6_multipath_hash.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2018-03-02 08:32:13 -08:00
committed by David S. Miller
parent 7efc0b6b66
commit 6f74b6c259
2 changed files with 13 additions and 11 deletions
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20
net/ipv4/route.c
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@@ -1748,37 +1748,39 @@ static void ip_multipath_l3_keys(const struct sk_buff *skb,
struct flow_keys *hash_keys)
{
const struct iphdr *outer_iph = ip_hdr(skb);
const struct iphdr *key_iph = outer_iph;
const struct iphdr *inner_iph;
const struct icmphdr *icmph;
struct iphdr _inner_iph;
struct icmphdr _icmph;
hash_keys->addrs.v4addrs.src = outer_iph->saddr;
hash_keys->addrs.v4addrs.dst = outer_iph->daddr;
if (likely(outer_iph->protocol != IPPROTO_ICMP))
return;
goto out;
if (unlikely((outer_iph->frag_off & htons(IP_OFFSET)) != 0))
return;
goto out;
icmph = skb_header_pointer(skb, outer_iph->ihl * 4, sizeof(_icmph),
&_icmph);
if (!icmph)
return;
goto out;
if (icmph->type != ICMP_DEST_UNREACH &&
icmph->type != ICMP_REDIRECT &&
icmph->type != ICMP_TIME_EXCEEDED &&
icmph->type != ICMP_PARAMETERPROB)
return;
goto out;
inner_iph = skb_header_pointer(skb,
outer_iph->ihl * 4 + sizeof(_icmph),
sizeof(_inner_iph), &_inner_iph);
if (!inner_iph)
return;
hash_keys->addrs.v4addrs.src = inner_iph->saddr;
hash_keys->addrs.v4addrs.dst = inner_iph->daddr;
goto out;
key_iph = inner_iph;
out:
hash_keys->addrs.v4addrs.src = key_iph->saddr;
hash_keys->addrs.v4addrs.dst = key_iph->daddr;
}
/* if skb is set it will be used and fl4 can be NULL */