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net: dsa: Factor bottom tag receive functions

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All DSA tag receive functions do strictly the same thing after they have located
the originating source port from their tag specific protocol:

- push ETH_HLEN bytes
- set pkt_type to PACKET_HOST
- call eth_type_trans()
- bump up counters
- call netif_receive_skb()

Factor all of that into dsa_switch_rcv(). This also makes us return a pointer to
a sk_buff, which makes us symetric with the xmit function.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-04-08 08:55:23 -07:00 • committed by David S. Miller
parent 16c5dcb13a
commit a86d8becc3
9 changed files with 53 additions and 84 deletions
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20
net/dsa/dsa.c
View file

@ -23,6 +23,7 @@
#include <linux/sysfs.h>
#include <linux/phy_fixed.h>
#include <linux/gpio/consumer.h>
#include <linux/etherdevice.h>
#include <net/dsa.h>
#include "dsa_priv.h"
@ -900,6 +901,7 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
{
struct dsa_switch_tree *dst = dev->dsa_ptr;
struct sk_buff *nskb = NULL;
if (unlikely(dst == NULL)) {
kfree_skb(skb);
@ -910,7 +912,23 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
if (!skb)
return 0;
return dst->rcv(skb, dev, pt, orig_dev);
nskb = dst->rcv(skb, dev, pt, orig_dev);
if (!nskb) {
kfree_skb(skb);
return 0;
}
skb = nskb;
skb_push(skb, ETH_HLEN);
skb->pkt_type = PACKET_HOST;
skb->protocol = eth_type_trans(skb, skb->dev);
skb->dev->stats.rx_packets++;
skb->dev->stats.rx_bytes += skb->len;
netif_receive_skb(skb);
return 0;
}
static struct packet_type dsa_pack_type __read_mostly = {