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From: wenxu@ucloud.cn
To: pablo@netfilter.org, fw@strlen.de
Cc: netfilter-devel@vger.kernel.org
Subject: [PATCH nf-next v3 4/9] netfilter: nft_payload: add nft_set_payload offload support
Date: Thu,  1 Aug 2019 22:01:21 +0800
Message-ID: <1564668086-16260-5-git-send-email-wenxu@ucloud.cn> (raw)
In-Reply-To: <1564668086-16260-1-git-send-email-wenxu@ucloud.cn>

From: wenxu <wenxu@ucloud.cn>

currently payload set only support ll header

nft --debug=netlink add rule netdev firewall aclout ip daddr 10.0.1.7 @ll,0,48
set 0x00002e9ca06e2596 @ll,48,48 set 0xfaffffffffff fwd to eth0

Signed-off-by: wenxu <wenxu@ucloud.cn>
---
v3: data from source register

 net/netfilter/nft_payload.c | 56 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 22a80eb..980e4a1 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -562,12 +562,68 @@ static int nft_payload_set_dump(struct sk_buff *skb, const struct nft_expr *expr
 	return -1;
 }
 
+static int nft_payload_set_offload(struct nft_offload_ctx *ctx,
+				   struct nft_flow_rule *flow,
+				   const struct nft_expr *expr)
+{
+	const struct nft_payload_set *priv = nft_expr_priv(expr);
+	struct nft_offload_reg *reg = &ctx->regs[priv->sreg];
+	const struct nft_data *data = &reg->data;
+	struct flow_action_entry *entry;
+	u32 len = priv->len;
+	u32 offset, last;
+	int n_actions, i;
+
+	if (priv->base != NFT_PAYLOAD_LL_HEADER || len > 16)
+		return -EOPNOTSUPP;
+
+	offset = priv->offset;
+	n_actions = len >> 2;
+	last = len & 0x3;
+
+	for (i = 0; i < n_actions; i++) {
+		entry = &flow->rule->action.entries[ctx->num_actions++];
+
+		entry->id = FLOW_ACTION_MANGLE;
+		entry->mangle.htype = FLOW_ACT_MANGLE_HDR_TYPE_ETH;
+		entry->mangle.mask = 0;
+		entry->mangle.val = data->data[i];
+		entry->mangle.offset = offset;
+		offset = offset + 4;
+	}
+
+	if (last) {
+		entry = &flow->rule->action.entries[ctx->num_actions++];
+
+		entry->id = FLOW_ACTION_MANGLE;
+		entry->mangle.htype = FLOW_ACT_MANGLE_HDR_TYPE_ETH;
+		entry->mangle.mask = ~((1 << (last * 8)) - 1);
+		entry->mangle.val = data->data[i];
+		entry->mangle.offset = offset;
+	}
+
+	return 0;
+}
+
+static int nft_payload_set_offload_actions(const struct nft_expr *expr)
+{
+	const struct nft_payload_set *priv = nft_expr_priv(expr);
+	u32 len = priv->len;
+
+	if (priv->base != NFT_PAYLOAD_LL_HEADER || len > 16)
+		return 0;
+
+	return (len >> 2) + !!(len & 3);
+}
+
 static const struct nft_expr_ops nft_payload_set_ops = {
 	.type		= &nft_payload_type,
 	.size		= NFT_EXPR_SIZE(sizeof(struct nft_payload_set)),
 	.eval		= nft_payload_set_eval,
 	.init		= nft_payload_set_init,
 	.dump		= nft_payload_set_dump,
+	.offload	= nft_payload_set_offload,
+	.offload_actions = nft_payload_set_offload_actions,
 };
 
 static const struct nft_expr_ops *
-- 
1.8.3.1


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-01 14:01 [PATCH nf-next v3 0/9] netfilter: nf_tables_offload: support more expr and obj offload wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 1/9] netfilter: nf_flow_offload: add net in offload_ctx wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 2/9] netfilter: nf_tables_offload: add offload_actions callback wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 3/9] netfilter: nft_fwd_netdev: add fw_netdev action support wenxu
2019-08-07 12:15   ` kbuild test robot
2019-08-08  6:06     ` wenxu
2019-08-01 14:01 ` wenxu [this message]
2019-08-07 12:18   ` [PATCH nf-next v3 4/9] netfilter: nft_payload: add nft_set_payload offload support kbuild test robot
2019-08-08  6:07     ` wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 5/9] netfilter: nft_tunnel: support NFT_TUNNEL_SRC/DST_IP match wenxu
2019-08-13 18:19   ` Pablo Neira Ayuso
2019-08-14  7:54     ` wenxu
2019-08-14  8:00       ` Pablo Neira Ayuso
2019-08-14  8:19         ` Pablo Neira Ayuso
2019-08-14  8:28           ` wenxu
2019-08-14  9:17             ` Pablo Neira Ayuso
2019-08-14  8:22         ` wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 6/9] netfilter: nft_tunnel: support tunnel meta match offload wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 7/9] netfilter: nft_tunnel: add NFTA_TUNNEL_KEY_RELEASE action wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 8/9] netfilter: nft_objref: add nft_objref_type offload wenxu
2019-08-01 14:01 ` [PATCH nf-next v3 9/9] netfilter: nft_tunnel: support nft_tunnel_obj offload wenxu
2019-08-13 10:58 ` [PATCH nf-next v3 0/9] netfilter: nf_tables_offload: support more expr and obj offload wenxu

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