diff options
| author | Tom Herbert | 2015-06-04 18:16:40 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-06-05 00:44:30 +0200 |
| commit | c3f8324188fa80178f20c8209b492ca6191177e8 (patch) | |
| tree | 7a79eea92ad702932fd81977118f6ab6394a9769 /include/net/ip.h | |
| parent | net: Get skb hash over flow_keys structure (diff) | |
| download | kernel-qcow2-linux-c3f8324188fa80178f20c8209b492ca6191177e8.tar.gz kernel-qcow2-linux-c3f8324188fa80178f20c8209b492ca6191177e8.tar.xz kernel-qcow2-linux-c3f8324188fa80178f20c8209b492ca6191177e8.zip | |
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/ip.h')
| -rw-r--r-- | include/net/ip.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 16cfc87fed6c..0750a186ea63 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -355,6 +355,20 @@ static inline __wsum inet_compute_pseudo(struct sk_buff *skb, int proto) skb->len, proto, 0); } +/* copy IPv4 saddr & daddr to flow_keys, possibly using 64bit load/store + * Equivalent to : flow->v4addrs.src = iph->saddr; + * flow->v4addrs.dst = iph->daddr; + */ +static inline void iph_to_flow_copy_v4addrs(struct flow_keys *flow, + const struct iphdr *iph) +{ + BUILD_BUG_ON(offsetof(typeof(flow->addrs), v4addrs.dst) != + offsetof(typeof(flow->addrs), v4addrs.src) + + sizeof(flow->addrs.v4addrs.src)); + memcpy(&flow->addrs.v4addrs, &iph->saddr, sizeof(flow->addrs.v4addrs)); + flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; +} + static inline void inet_set_txhash(struct sock *sk) { struct inet_sock *inet = inet_sk(sk); @@ -362,8 +376,9 @@ static inline void inet_set_txhash(struct sock *sk) memset(&keys, 0, sizeof(keys)); - keys.addrs.src = inet->inet_saddr; - keys.addrs.dst = inet->inet_daddr; + keys.addrs.v4addrs.src = inet->inet_saddr; + keys.addrs.v4addrs.dst = inet->inet_daddr; + keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; keys.ports.src = inet->inet_sport; keys.ports.dst = inet->inet_dport; |