ipv6: Add support for non-equal-cost multipath
The use of hash-threshold instead of modulo-N makes it trivial to add
support for non-equal-cost multipath.
Instead of dividing the multipath hash function's output space equally
between the nexthops, each nexthop is assigned a region size which is
proportional to its weight.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 97cd05d..34ec321d 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -171,6 +171,7 @@ struct rt6_info {
u32 rt6i_metric;
u32 rt6i_pmtu;
/* more non-fragment space at head required */
+ int rt6i_nh_weight;
unsigned short rt6i_nfheader_len;
u8 rt6i_protocol;
u8 exception_bucket_flushed:1,