netdev - [PATCH v4 net-next 2/4] net/sched: act_mirred: Refactor detection whether dev needs xmit at mac header

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Date:   Thu, 13 Oct 2016 09:06:42 +0300
From:   Shmulik Ladkani <shmulik.ladkani@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        Eric Dumazet <edumazet@...gle.com>,
        WANG Cong <xiyou.wangcong@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
        Shmulik Ladkani <shmulik.ladkani@...il.com>
Subject: [PATCH v4 net-next 2/4] net/sched: act_mirred: Refactor detection whether dev needs xmit at mac header

Move detection logic that tests whether device expects skb data to point
at mac_header upon xmit into a function.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@...il.com>
---
 net/sched/act_mirred.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 16e17a8..69dcce8 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -54,6 +54,20 @@ static void tcf_mirred_release(struct tc_action *a, int bind)
 static int mirred_net_id;
 static struct tc_action_ops act_mirred_ops;
 
+static bool dev_is_mac_header_xmit(const struct net_device *dev)
+{
+	switch (dev->type) {
+	case ARPHRD_TUNNEL:
+	case ARPHRD_TUNNEL6:
+	case ARPHRD_SIT:
+	case ARPHRD_IPGRE:
+	case ARPHRD_VOID:
+	case ARPHRD_NONE:
+		return false;
+	}
+	return true;
+}
+
 static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 			   struct nlattr *est, struct tc_action **a, int ovr,
 			   int bind)
@@ -96,19 +110,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 				tcf_hash_release(*a, bind);
 			return -ENODEV;
 		}
-		switch (dev->type) {
-		case ARPHRD_TUNNEL:
-		case ARPHRD_TUNNEL6:
-		case ARPHRD_SIT:
-		case ARPHRD_IPGRE:
-		case ARPHRD_VOID:
-		case ARPHRD_NONE:
-			mac_header_xmit = false;
-			break;
-		default:
-			mac_header_xmit = true;
-			break;
-		}
+		mac_header_xmit = dev_is_mac_header_xmit(dev);
 	} else {
 		dev = NULL;
 	}
-- 
1.9.1