netdev - [RFC net-next 4/9] net/act_skbedit: Introduce hardware offload support

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Date:	Mon,  1 Feb 2016 08:34:40 +0000
From:	Amir Vadai <amir@...ai.me>
To:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	John Fastabend <john.r.fastabend@...el.com>
Cc:	Or Gerlitz <ogerlitz@...lanox.com>,
	Hadar Har-Zion <hadarh@...lanox.com>,
	Jiri Pirko <jiri@...lanox.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Amir Vadai <amir@...ai.me>
Subject: [RFC net-next 4/9] net/act_skbedit: Introduce hardware offload support

Currently only 'mark' operation is supported when hardware offload is
requested.

Signed-off-by: Amir Vadai <amir@...ai.me>
---
 net/sched/act_skbedit.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c
index 6751b5f..3113dfc 100644
--- a/net/sched/act_skbedit.c
+++ b/net/sched/act_skbedit.c
@@ -23,6 +23,7 @@
 #include <linux/rtnetlink.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
+#include <net/switchdev.h>
 
 #include <linux/tc_act/tc_skbedit.h>
 #include <net/tc_act/tc_skbedit.h>
@@ -173,6 +174,22 @@ nla_put_failure:
 	return -1;
 }
 
+static int tcf_skbedit_offload_init(struct tc_action *a,
+				    struct switchdev_obj_port_flow_act *obj)
+{
+	struct tcf_skbedit *d = a->priv;
+
+	if (d->flags == SKBEDIT_F_MARK) {
+		obj->actions |= BIT(SWITCHDEV_OBJ_PORT_FLOW_ACT_MARK);
+		obj->mark = d->mark;
+
+		return 0;
+	}
+
+	pr_err("Only 'mark' is supported for offloaded skbedit\n");
+	return -ENOTSUPP;
+}
+
 static struct tc_action_ops act_skbedit_ops = {
 	.kind		=	"skbedit",
 	.type		=	TCA_ACT_SKBEDIT,
@@ -180,6 +197,7 @@ static struct tc_action_ops act_skbedit_ops = {
 	.act		=	tcf_skbedit,
 	.dump		=	tcf_skbedit_dump,
 	.init		=	tcf_skbedit_init,
+	.offload_init	=	tcf_skbedit_offload_init,
 };
 
 MODULE_AUTHOR("Alexander Duyck, <alexander.h.duyck@...el.com>");
-- 
2.7.0