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net: Get skb hash over flow_keys structure

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This patch changes flow hashing to use jhash2 over the flow_keys
structure instead just doing jhash_3words over src, dst, and ports.
This method will allow us take more input into the hashing function
so that we can include full IPv6 addresses, VLAN, flow labels etc.
without needing to resort to xor'ing which makes for a poor hash.

Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-06-04 09:16:39 -07:00 • committed by David S. Miller
parent c468efe2c7
commit 42aecaa9bb
6 changed files with 66 additions and 17 deletions
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2
include/net/ipv6.h
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@ -699,6 +699,8 @@ static inline void ip6_set_txhash(struct sock *sk)
struct ipv6_pinfo *np = inet6_sk(sk);
struct flow_keys keys;
memset(&keys, 0, sizeof(keys));
keys.addrs.src = (__force __be32)ipv6_addr_hash(&np->saddr);
keys.addrs.dst = (__force __be32)ipv6_addr_hash(&sk->sk_v6_daddr);
keys.ports.src = inet->inet_sport;