dev: packet: make packet_direct_xmit a common function
The new dev_direct_xmit will be used by AF_XDP in later commits.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/net/core/dev.c b/net/core/dev.c
index aea36b5..d3fdc86 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3625,6 +3625,44 @@ int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv)
}
EXPORT_SYMBOL(dev_queue_xmit_accel);
+int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
+{
+ struct net_device *dev = skb->dev;
+ struct sk_buff *orig_skb = skb;
+ struct netdev_queue *txq;
+ int ret = NETDEV_TX_BUSY;
+ bool again = false;
+
+ if (unlikely(!netif_running(dev) ||
+ !netif_carrier_ok(dev)))
+ goto drop;
+
+ skb = validate_xmit_skb_list(skb, dev, &again);
+ if (skb != orig_skb)
+ goto drop;
+
+ skb_set_queue_mapping(skb, queue_id);
+ txq = skb_get_tx_queue(dev, skb);
+
+ local_bh_disable();
+
+ HARD_TX_LOCK(dev, txq, smp_processor_id());
+ if (!netif_xmit_frozen_or_drv_stopped(txq))
+ ret = netdev_start_xmit(skb, dev, txq, false);
+ HARD_TX_UNLOCK(dev, txq);
+
+ local_bh_enable();
+
+ if (!dev_xmit_complete(ret))
+ kfree_skb(skb);
+
+ return ret;
+drop:
+ atomic_long_inc(&dev->tx_dropped);
+ kfree_skb_list(skb);
+ return NET_XMIT_DROP;
+}
+EXPORT_SYMBOL(dev_direct_xmit);
/*************************************************************************
* Receiver routines