From: Jakub Sitnicki <jkbs@redhat.com>
Date: Wed, 23 Aug 2017 07:58:28 +0000 (+0200)
Subject: net: Extend struct flowi6 with multipath hash
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=29825717123fb9cfb9e709327d565c2f2fa89903;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

net: Extend struct flowi6 with multipath hash

Allow for functions that fill out the IPv6 flow info to also pass a hash
computed over the skb contents. The hash value will drive the multipath
routing decisions.

This is intended for special treatment of ICMPv6 errors, where we would
like to make a routing decision based on the flow identifying the
offending IPv6 datagram that triggered the error, rather than the flow
of the ICMP error itself.

Signed-off-by: Jakub Sitnicki <jkbs@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/flow.h b/include/net/flow.h
index f3dc61b29bb5..eb60cee30b44 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -149,6 +149,7 @@ struct flowi6 {
 #define fl6_ipsec_spi		uli.spi
 #define fl6_mh_type		uli.mht.type
 #define fl6_gre_key		uli.gre_key
+	__u32			mp_hash;
 } __attribute__((__aligned__(BITS_PER_LONG/8)));
 
 struct flowidn {