From 0cb09aff9d49d92305c3969fc84b785117412968 Mon Sep 17 00:00:00 2001 From: Ariel Levkovich <lariel@mellanox.com> Date: Thu, 23 Jul 2020 01:03:00 +0300 Subject: net/flow_dissector: add packet hash dissection Retreive a hash value from the SKB and store it in the dissector key for future matching. Signed-off-by: Ariel Levkovich <lariel@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/core/flow_dissector.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'net/core') diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 142a8824f0a8..29806eb765cf 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -383,6 +383,23 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb, } EXPORT_SYMBOL(skb_flow_dissect_tunnel_info); +void skb_flow_dissect_hash(const struct sk_buff *skb, + struct flow_dissector *flow_dissector, + void *target_container) +{ + struct flow_dissector_key_hash *key; + + if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_HASH)) + return; + + key = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_HASH, + target_container); + + key->hash = skb_get_hash_raw(skb); +} +EXPORT_SYMBOL(skb_flow_dissect_hash); + static enum flow_dissect_ret __skb_flow_dissect_mpls(const struct sk_buff *skb, struct flow_dissector *flow_dissector, -- cgit v1.2.3