From 0cb09aff9d49d92305c3969fc84b785117412968 Mon Sep 17 00:00:00 2001 From: Ariel Levkovich 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 Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller --- include/linux/skbuff.h | 4 ++++ include/net/flow_dissector.h | 9 +++++++++ 2 files changed, 13 insertions(+) (limited to 'include') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 6a82d4a8229e..fa817a105517 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1342,6 +1342,10 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb, struct flow_dissector *flow_dissector, void *target_container); +void skb_flow_dissect_hash(const struct sk_buff *skb, + struct flow_dissector *flow_dissector, + void *target_container); + static inline __u32 skb_get_hash(struct sk_buff *skb) { if (!skb->l4_hash && !skb->sw_hash) diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 4b6e36288ddd..cc10b10dc3a1 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -243,6 +243,14 @@ struct flow_dissector_key_ct { u32 ct_labels[4]; }; +/** + * struct flow_dissector_key_hash: + * @hash: hash value + */ +struct flow_dissector_key_hash { + u32 hash; +}; + enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ @@ -271,6 +279,7 @@ enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_ENC_OPTS, /* struct flow_dissector_key_enc_opts */ FLOW_DISSECTOR_KEY_META, /* struct flow_dissector_key_meta */ FLOW_DISSECTOR_KEY_CT, /* struct flow_dissector_key_ct */ + FLOW_DISSECTOR_KEY_HASH, /* struct flow_dissector_key_hash */ FLOW_DISSECTOR_KEY_MAX, }; -- cgit v1.2.3