[dpdk-stable] [PATCH] net/pcap: fix byte stats for drop Tx

[Ferriter, Cian]

> -----Original Message-----
> From: Yigit, Ferruh <ferruh.yigit at intel.com>
> Sent: Wednesday 3 February 2021 17:30
> To: Ferriter, Cian <cian.ferriter at intel.com>
> Cc: Yigit, Ferruh <ferruh.yigit at intel.com>; dev at dpdk.org; stable at dpdk.org
> Subject: [PATCH] net/pcap: fix byte stats for drop Tx
> 
> Drop Tx path in pcap is Tx that just drops the packets, which is used
> for the case only Rx from a pcap file is requested/matters.
> 
> The byte stats was calculated using first mbuf segment, which gives
> wrong values for multi segmented mbufs, updated to use packet length
> instead.
> 
> Bugzilla ID: 597
> Fixes: a3f5252e5cbd ("net/pcap: enable infinitely Rx a pcap file")
> Cc: stable at dpdk.org
> 
> Reported-by: Cian Ferriter <cian.ferriter at intel.com>
> Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
> ---

Acked-by: Cian Ferriter <cian.ferriter at intel.com>

Tested this with 2 large PCAPs and it works as expected:

testpmd> show port stats all

  ######################## NIC statistics for port 0  ########################
  RX-packets: 2          RX-missed: 0          RX-bytes:  131070
  RX-errors: 0
  RX-nombuf:  0
  TX-packets: 2          TX-errors: 0          TX-bytes:  131070

  Throughput (since last show)
  Rx-pps:            0          Rx-bps:            0
  Tx-pps:            0          Tx-bps:            0
  ############################################################################