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| author |   Magnus Karlsson <magnus.karlsson@intel.com> | 2018-05-02 13:01:33 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-05-03 15:55:24 -0700 |
| commit | 865b03f21162e4edfda51fc08693c864b1d4fdaf (patch) | |
| tree | a1ddbccb1429b3d756717a1487b636f253d476d9 /net/packet | |
| parent | xsk: add Tx queue setup and mmap support (diff) | |
| download | linux-dev-865b03f21162e4edfda51fc08693c864b1d4fdaf.tar.xz linux-dev-865b03f21162e4edfda51fc08693c864b1d4fdaf.zip | |
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.c | 42 |
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 |