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| author | Tom Herbert <tom@herbertland.com> | 2015-06-04 18:16:44 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-05 00:44:31 +0200 |
| commit | 87ee9e52ffeb168803a76cc07734425227cc2268 (patch) | |
| tree | 2bfbfdd9de14ba920231bcab9eb6efe46a509966 | |
| parent | net: Add VLAN ID to flow_keys (diff) | |
| download | linux-87ee9e52ffeb168803a76cc07734425227cc2268.tar.xz linux-87ee9e52ffeb168803a76cc07734425227cc2268.zip | |
net: Add IPv6 flow label to flow_keys
In flow_dissector set the flow label in flow_keys for IPv6. This also
removes the shortcircuiting of flow dissection when a non-zero label
is present, the flow label can be considered to provide additional
entropy for a hash.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/flow_dissector.h | 4 | ||||
| -rw-r--r-- | net/core/flow_dissector.c | 29 |
2 files changed, 13 insertions, 20 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 08480fbb9035..14d8483d836e 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -28,7 +28,8 @@ struct flow_dissector_key_basic { }; struct flow_dissector_key_tags { - u32 vlan_id:12; + u32 vlan_id:12, + flow_label:20; }; /** @@ -111,6 +112,7 @@ enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */ FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */ FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */ + FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */ FLOW_DISSECTOR_KEY_MAX, }; diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 5c66cb2e66df..70f0567b6be9 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -210,30 +210,17 @@ ipv6: memcpy(key_ipv6_addrs, &iph->saddr, sizeof(*key_ipv6_addrs)); key_control->addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; - goto flow_label; } - break; -flow_label: + flow_label = ip6_flowlabel(iph); if (flow_label) { - /* Awesome, IPv6 packet has a flow label so we can - * use that to represent the ports without any - * further dissection. - */ - - key_basic->n_proto = proto; - key_basic->ip_proto = ip_proto; - key_control->thoff = (u16)nhoff; - if (skb_flow_dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_PORTS)) { - key_ports = skb_flow_dissector_target(flow_dissector, - FLOW_DISSECTOR_KEY_PORTS, - target_container); - key_ports->ports = flow_label; + FLOW_DISSECTOR_KEY_FLOW_LABEL)) { + key_tags = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_FLOW_LABEL, + target_container); + key_tags->flow_label = ntohl(flow_label); } - - return true; } break; @@ -659,6 +646,10 @@ static const struct flow_dissector_key flow_keys_dissector_keys[] = { .key_id = FLOW_DISSECTOR_KEY_VLANID, .offset = offsetof(struct flow_keys, tags), }, + { + .key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL, + .offset = offsetof(struct flow_keys, tags), + }, }; static const struct flow_dissector_key flow_keys_buf_dissector_keys[] = { |