Match on ethertype and set up protocol dependency. Check for protocol
dependency before accessing the tci field. Allow to match on the
encapsulated ethertype too.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/net/flow_dissector.h | 9 ++++++---
net/netfilter/nft_payload.c | 22 ++++++++++++++++++++++
2 files changed, 28 insertions(+), 3 deletions(-)
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index 1a0727d1acfa..f06b0239c32b 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -48,9 +48,12 @@ struct flow_dissector_key_tags {
};
struct flow_dissector_key_vlan {
- u16 vlan_id:12,
- vlan_dei:1,
- vlan_priority:3;
+ union {
+ u16 vlan_id:12,
+ vlan_dei:1,
+ vlan_priority:3;
+ __be16 vlan_tci;
+ };
__be16 vlan_tpid;
};
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 0877d46b8605..f17939fbf6c3 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -182,6 +182,28 @@ static int nft_payload_offload_ll(struct nft_offload_ctx *ctx,
NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_ETH_ADDRS, eth_addrs,
dst, ETH_ALEN, reg);
break;
+ case offsetof(struct ethhdr, h_proto):
+ if (priv->len != sizeof(__be16))
+ return -EOPNOTSUPP;
+
+ NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_BASIC, basic,
+ n_proto, sizeof(__be16), reg);
+ nft_offload_set_dependency(ctx, NFT_OFFLOAD_DEP_NETWORK);
+ break;
+ case offsetof(struct vlan_ethhdr, h_vlan_TCI):
+ if (priv->len != sizeof(__be16))
+ return -EOPNOTSUPP;
+
+ NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_VLAN, vlan,
+ vlan_tci, sizeof(__be16), reg);
+ break;
+ case offsetof(struct vlan_ethhdr, h_vlan_encapsulated_proto):
+ if (priv->len != sizeof(__be16))
+ return -EOPNOTSUPP;
+
+ NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_VLAN, vlan,
+ vlan_tpid, sizeof(__be16), reg);
+ break;
default:
return -EOPNOTSUPP;
}
--
2.11.0
