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authorMagnus Karlsson <magnus.karlsson@intel.com>2018-05-02 13:01:33 +0200
committerAlexei Starovoitov <ast@kernel.org>2018-05-03 15:55:24 -0700
commit865b03f21162e4edfda51fc08693c864b1d4fdaf (patch)
treea1ddbccb1429b3d756717a1487b636f253d476d9 /net/packet
parentf61459030ec7fffdaa3c462cc0f728eef11b4d05 (diff)
downloadlinux-stericsson-865b03f21162e4edfda51fc08693c864b1d4fdaf.tar.gz
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>
Diffstat (limited to 'net/packet')
-rw-r--r--net/packet/af_packet.c42
1 files changed, 5 insertions, 37 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 01f3515cada0..611a26d5235c 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -209,7 +209,7 @@ static void prb_clear_rxhash(struct tpacket_kbdq_core *,
static void prb_fill_vlan_info(struct tpacket_kbdq_core *,
struct tpacket3_hdr *);
static void packet_flush_mclist(struct sock *sk);
-static void packet_pick_tx_queue(struct net_device *dev, struct sk_buff *skb);
+static u16 packet_pick_tx_queue(struct sk_buff *skb);
struct packet_skb_cb {
union {
@@ -243,40 +243,7 @@ static void __fanout_link(struct sock *sk, struct packet_sock *po);
static int packet_direct_xmit(struct sk_buff *skb)
{
- 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;
-
- packet_pick_tx_queue(dev, skb);
- 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;
+ return dev_direct_xmit(skb, packet_pick_tx_queue(skb));
}
static struct net_device *packet_cached_dev_get(struct packet_sock *po)
@@ -313,8 +280,9 @@ static u16 __packet_pick_tx_queue(struct net_device *dev, struct sk_buff *skb)
return (u16) raw_smp_processor_id() % dev->real_num_tx_queues;
}
-static void packet_pick_tx_queue(struct net_device *dev, struct sk_buff *skb)
+static u16 packet_pick_tx_queue(struct sk_buff *skb)
{
+ struct net_device *dev = skb->dev;
const struct net_device_ops *ops = dev->netdev_ops;
u16 queue_index;
@@ -326,7 +294,7 @@ static void packet_pick_tx_queue(struct net_device *dev, struct sk_buff *skb)
queue_index = __packet_pick_tx_queue(dev, skb);
}
- skb_set_queue_mapping(skb, queue_index);
+ return queue_index;
}
/* __register_prot_hook must be invoked through register_prot_hook