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flow_dissector: Dissect tos and ttl from the tunnel info 

Add dissection of the tos and ttl from the ip tunnel headers
fields in case a match is needed on them.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2018-07-17 19:27:17 +03:00 committed by David S. Miller
parent 07a557f47d
commit 5544adb970
2 changed files with 14 additions and 2 deletions
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2
include/net/flow_dissector.h
View File

@ -207,7 +207,7 @@ enum flow_dissector_key_id {
FLOW_DISSECTOR_KEY_TCP, /* struct flow_dissector_key_tcp */
FLOW_DISSECTOR_KEY_IP, /* struct flow_dissector_key_ip */
FLOW_DISSECTOR_KEY_CVLAN, /* struct flow_dissector_key_flow_vlan */
FLOW_DISSECTOR_KEY_ENC_IP, /* struct flow_dissector_key_ip */
FLOW_DISSECTOR_KEY_MAX,
};

14
net/core/flow_dissector.c
View File

@ -152,7 +152,9 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb,
!dissector_uses_key(flow_dissector,
FLOW_DISSECTOR_KEY_ENC_CONTROL) &&
!dissector_uses_key(flow_dissector,
FLOW_DISSECTOR_KEY_ENC_PORTS))
FLOW_DISSECTOR_KEY_ENC_PORTS) &&
!dissector_uses_key(flow_dissector,
FLOW_DISSECTOR_KEY_ENC_IP))
return;
info = skb_tunnel_info(skb);
@ -212,6 +214,16 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb,
tp->src = key->tp_src;
tp->dst = key->tp_dst;
}
if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_IP)) {
struct flow_dissector_key_ip *ip;
ip = skb_flow_dissector_target(flow_dissector,
FLOW_DISSECTOR_KEY_ENC_IP,
target_container);
ip->tos = key->tos;
ip->ttl = key->ttl;
}
}
EXPORT_SYMBOL(skb_flow_dissect_tunnel_info);