> -----Original Message-----
> From: Ido Goshen <i...@cgstowernetworks.com>
> Sent: Monday, 23 May 2022 17:27
> To: Thomas Monjalon <tho...@monjalon.net>; Ferruh Yigit
> <ferruh.yi...@xilinx.com>; Andrew Rybchenko
> <andrew.rybche...@oktetlabs.ru>
> Cc: dev@dpdk.org; Ido Goshen <i...@cgstowernetworks.com>
> Subject: [PATCH v2] pcap: support MTU set
> v2:
> preserve pcap behavior to support max size packets by default
> ---
[idog] on top enforcing mtu and giving an option to set it
the v2 of the patch also preserves the default behavior of pcap pmd to rx jumbo
packets
By default it will receive jumbo packets (jumbo_9000.pcap as a single 9000
bytes long packet)
cgs@idog-ubuntu:~/dpdk-next-net$ build/app/dpdk-testpmd --no-huge -m1024 -l
0-1
--vdev='net_pcap0,rx_pcap=rx_pcap=pcap/jumbo_9000.pcap,tx_pcap=pcap/file_tx.pcap'
-- --no-flush-rx -i --auto-start
...
testpmd> stop
Telling cores to stop...
Waiting for lcores to finish...
---------------------- Forward statistics for port 0
----------------------
RX-packets: 1 RX-dropped: 0 RX-total: 1
TX-packets: 1 TX-dropped: 0 TX-total: 1
----------------------------------------------------------------------------
But now it will also nicely reflect it by rte_eth_dev_get_mtu
testpmd> show port info 0
********************* Infos for port 0 *********************
MAC address: 02:70:63:61:70:00
Device name: net_pcap0
Driver name: net_pcap
...
MTU: 65535
In addition it gives option to control the mtu for anyone who wants to reduce
it
In testpmd either 'port config mtu' or --max-pkt-len can be used (as for other
pmd's)
e.g.
cgs@idog-ubuntu:~/dpdk-next-net$ build/app/dpdk-testpmd --no-huge -m1024 -l
0-1
--vdev='net_pcap0,rx_pcap=rx_pcap=pcap/jumbo_9000.pcap,tx_pcap=pcap/file_tx.pcap'
-- --no-flush-rx -i
...
testpmd> port config mtu 0 1500
testpmd> show port info 0
********************* Infos for port 0 *********************
MAC address: 02:70:63:61:70:00
Device name: net_pcap0
Driver name: net_pcap
...
MTU: 1500
...
testpmd> start
....
testpmd> stop
---------------------- Forward statistics for port 0
----------------------
RX-packets: 0 RX-dropped: 0 RX-total: 0
RX-error: 1
RX-nombufs: 0
TX-packets: 0 TX-dropped: 0 TX-total: 0
----------------------------------------------------------------------------
