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Ido Schimmel authored
Up until now the driver assumed all the nexthops have an equal weight and wrote each to a single adjacency entry. This patch takes the `weight` parameter into account and populates the adjacency group according to the relative weight of each nexthop. Specifically, the weights of all the nexthops that should be offloaded are first normalized and then used to calculate the upper adjacency index of each nexthop. This is done according to the hash-threshold algorithm used by the kernel for IPv4 multi-path routing. Adjacency groups are currently limited to 32 entries which limits the weights that can be used, but follow-up patches will introduce groups of 512 entries. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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