ipv6 Use get_hash_from_flowi6 for rt6 hash

In rt6_info_hash_nhsfn replace the custom hashing over flowi6 that is
using xor with a call to common function get_hash_from_flowi6.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 53617d71518850dfc26220dd15923b8027c5249a..111deadc1c0622b6fa895def814fa202e6c2b6ba 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -421,31 +421,7 @@ static bool rt6_check_expired(const struct rt6_info *rt)
 static int rt6_info_hash_nhsfn(unsigned int candidate_count,
                               const struct flowi6 *fl6)
 {
-       unsigned int val = fl6->flowi6_proto;
-
-       val ^= ipv6_addr_hash(&fl6->daddr);
-       val ^= ipv6_addr_hash(&fl6->saddr);
-
-       /* Work only if this not encapsulated */
-       switch (fl6->flowi6_proto) {
-       case IPPROTO_UDP:
-       case IPPROTO_TCP:
-       case IPPROTO_SCTP:
-               val ^= (__force u16)fl6->fl6_sport;
-               val ^= (__force u16)fl6->fl6_dport;
-               break;
-
-       case IPPROTO_ICMPV6:
-               val ^= (__force u16)fl6->fl6_icmp_type;
-               val ^= (__force u16)fl6->fl6_icmp_code;
-               break;
-       }
-       /* RFC6438 recommands to use flowlabel */
-       val ^= (__force u32)fl6->flowlabel;
-
-       /* Perhaps, we need to tune, this function? */
-       val = val ^ (val >> 7) ^ (val >> 12);
-       return val % candidate_count;
+       return get_hash_from_flowi6(fl6) % candidate_count;
 }
 
 static struct rt6_info *rt6_multipath_select(struct rt6_info *match,