pktgen: tx_bytes might be slightly wrong

cur_pkt_size can be changed in proc fs while pktgen is running,
we better use a private field to get precise tx-bytes counter.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 5ce017bf4afa..d38470a32792 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -340,6 +340,7 @@ struct pktgen_dev {
         __u16 cur_udp_src;
         __u16 cur_queue_map;
         __u32 cur_pkt_size;
+        __u32 last_pkt_size;
 
         __u8 hh[14];
         /* = {
@@ -3434,7 +3435,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
                         pkt_dev->clone_count--; /* back out increment, OOM */
                         return;
                 }
-
+                pkt_dev->last_pkt_size = pkt_dev->skb->len;
                 pkt_dev->allocated_skbs++;
                 pkt_dev->clone_count = 0;       /* reset counter */
         }
@@ -3461,7 +3462,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
                 pkt_dev->last_ok = 1;
                 pkt_dev->sofar++;
                 pkt_dev->seq_num++;
-                pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
+                pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
                 break;
         default: /* Drivers are not supposed to return other values! */
                 if (net_ratelimit())