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ipv6: Use a 31-bit multipath hash
The hash thresholds assigned to IPv6 nexthops are in the range of [-1, 2^31 - 1], where a negative value is assigned to nexthops that should not be considered during multipath selection. Therefore, in a similar fashion to IPv4, we need to use the upper 31-bits of the multipath hash for multipath selection. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1833,10 +1833,10 @@ u32 rt6_multipath_hash(const struct flowi6 *fl6, const struct sk_buff *skb)
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if (skb) {
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ip6_multipath_l3_keys(skb, &hash_keys);
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return flow_hash_from_keys(&hash_keys);
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return flow_hash_from_keys(&hash_keys) >> 1;
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}
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return get_hash_from_flowi6(fl6);
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return get_hash_from_flowi6(fl6) >> 1;
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}
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void ip6_route_input(struct sk_buff *skb)
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