From: Paolo Abeni Date: Thu, 29 Oct 2015 21:20:40 +0000 (+0100) Subject: ipv4: use l4 hash for locally generated multipath flows X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9920e48b830a0f4ec06bcbf0ec3147c88ae72bac;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ipv4: use l4 hash for locally generated multipath flows This patch changes how the multipath hash is computed for locally generated flows: now the hash comprises l4 information. This allows better utilization of the available paths when the existing flows have the same source IP and the same destination IP: with l3 hash, even when multiple connections are in place simultaneously, a single path will be used, while with l4 hash we can use all the available paths. v2 changes: - use get_hash_from_flowi4() instead of implementing just another l4 hash function Signed-off-by: Paolo Abeni Signed-off-by: David S. Miller --- diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 42778d9d71e5..f30df0ee4f4d 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -1564,7 +1564,8 @@ void fib_select_path(struct net *net, struct fib_result *res, #ifdef CONFIG_IP_ROUTE_MULTIPATH if (res->fi->fib_nhs > 1 && fl4->flowi4_oif == 0) { if (mp_hash < 0) - mp_hash = fib_multipath_hash(fl4->saddr, fl4->daddr); + mp_hash = get_hash_from_flowi4(fl4) >> 1; + fib_select_multipath(res, mp_hash); } else