pktgen: ndo_start_xmit can return NET_XMIT_xxx values

This updates pktgen so that it does not decrement skb->users
when it receives valid NET_XMIT_xxx values.  These are now
valid return values from ndo_start_xmit in net-next-2.6.
They also indicate the skb has been consumed.

This fixes pktgen to work correctly with vlan devices.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 2 deletions

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index a23b45f08ec9..de0c2c726420 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -250,8 +250,7 @@ struct pktgen_dev {
         __u64 count;            /* Default No packets to send */
         __u64 sofar;            /* How many pkts we've sent so far */
         __u64 tx_bytes;         /* How many bytes we've transmitted */
-        __u64 errors;           /* Errors when trying to transmit,
-                                   pkts will be re-sent */
+        __u64 errors;           /* Errors when trying to transmit, */
 
         /* runtime counters relating to clone_skb */
 
@@ -3465,6 +3464,12 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
                 pkt_dev->seq_num++;
                 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
                 break;
+        case NET_XMIT_DROP:
+        case NET_XMIT_CN:
+        case NET_XMIT_POLICED:
+                /* skb has been consumed */
+                pkt_dev->errors++;
+                break;
         default: /* Drivers are not supposed to return other values! */
                 if (net_ratelimit())
                         pr_info("pktgen: %s xmit error: %d\n",