From 1a123a3168566b10f87f228ae963770b26f27420 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 3 Sep 2009 00:39:16 +0000 Subject: vlan: adds drops accounting Its hard to tell if vlans are dropping frames, since every frame given to vlan_???_start_xmit() functions is accounted as fully transmitted by lower device. We can test dev_queue_xmit() return values to properly account for dropped frames. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/8021q/vlan_dev.c | 29 ++++++++++++++++++++++------- 1 file changed, 22 insertions(+), 7 deletions(-) diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 3938c3e50fb1..4198ec5c8abc 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -294,6 +294,8 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, int i = skb_get_queue_mapping(skb); struct netdev_queue *txq = netdev_get_tx_queue(dev, i); struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); + unsigned int len; + int ret; /* Handle non-VLAN frames if they are sent to us, for example by DHCP. * @@ -319,11 +321,17 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; } - txq->tx_packets++; - txq->tx_bytes += skb->len; skb->dev = vlan_dev_info(dev)->real_dev; - dev_queue_xmit(skb); + len = skb->len; + ret = dev_queue_xmit(skb); + + if (likely(ret == NET_XMIT_SUCCESS)) { + txq->tx_packets++; + txq->tx_bytes += len; + } else + txq->tx_dropped++; + return NETDEV_TX_OK; } @@ -333,16 +341,23 @@ static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, int i = skb_get_queue_mapping(skb); struct netdev_queue *txq = netdev_get_tx_queue(dev, i); u16 vlan_tci; + unsigned int len; + int ret; vlan_tci = vlan_dev_info(dev)->vlan_id; vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); skb = __vlan_hwaccel_put_tag(skb, vlan_tci); - txq->tx_packets++; - txq->tx_bytes += skb->len; - skb->dev = vlan_dev_info(dev)->real_dev; - dev_queue_xmit(skb); + len = skb->len; + ret = dev_queue_xmit(skb); + + if (likely(ret == NET_XMIT_SUCCESS)) { + txq->tx_packets++; + txq->tx_bytes += len; + } else + txq->tx_dropped++; + return NETDEV_TX_OK; } -- cgit v1.2.3