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authorTom Herbert <tom@herbertland.com>2015-06-04 09:16:40 -0700
committerDavid S. Miller <davem@davemloft.net>2015-06-04 15:44:30 -0700
commitc3f8324188fa80178f20c8209b492ca6191177e8 (patch)
tree7a79eea92ad702932fd81977118f6ab6394a9769 /include/net/ipv6.h
parent42aecaa9bb2bd57eb8d61b4565cee5d3640863fb (diff)
net: Add full IPv6 addresses to flow_keys
This patch adds full IPv6 addresses into flow_keys and uses them as input to the flow hash function. The implementation supports either IPv4 or IPv6 addresses in a union, and selector is used to determine how may words to input to jhash2. We also add flow_get_u32_dst and flow_get_u32_src functions which are used to get a u32 representation of the source and destination addresses. For IPv6, ipv6_addr_hash is called. These functions retain getting the legacy values of src and dst in flow_keys. With this patch, Ethertype and IP protocol are now included in the flow hash input. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ipv6.h')
-rw-r--r--include/net/ipv6.h21
1 files changed, 19 insertions, 2 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 474ca466a091..82dbdb092a5d 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -692,6 +692,20 @@ static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6,
return hlimit;
}
+/* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store
+ * Equivalent to : flow->v6addrs.src = iph->saddr;
+ * flow->v6addrs.dst = iph->daddr;
+ */
+static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow,
+ const struct ipv6hdr *iph)
+{
+ BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) !=
+ offsetof(typeof(flow->addrs), v6addrs.src) +
+ sizeof(flow->addrs.v6addrs.src));
+ memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs));
+ flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+}
+
#if IS_ENABLED(CONFIG_IPV6)
static inline void ip6_set_txhash(struct sock *sk)
{
@@ -701,8 +715,11 @@ static inline void ip6_set_txhash(struct sock *sk)
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);
+ memcpy(&keys.addrs.v6addrs.src, &np->saddr,
+ sizeof(keys.addrs.v6addrs.src));
+ memcpy(&keys.addrs.v6addrs.dst, &sk->sk_v6_daddr,
+ sizeof(keys.addrs.v6addrs.dst));
+ keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
keys.ports.src = inet->inet_sport;
keys.ports.dst = inet->inet_dport;