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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
dreibh · Aug 25, 2017 · 2982571 · 2982571
1 parent 790c605
commit 2982571
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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 {