Since, the port 5 is dropping it on the tx side, are there logs or more
granular error counters?
FWIW, here are snippets from the qemu process's command line:
... -m 2048 -mem-prealloc -mem-path /dev/hugepages/libvirt/qemu ...
... -chardev socket,id=charnet0,path=/usr/local/var/run/openvswitch/vi1
-netdev vhost-user,chardev=charnet0,id=hostnet0 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=3a:19:09:52:14:50,bus=pci.0,addr=0x3
...
srwxr-xr-x 1 root root 0 Apr 3 14:51 /usr/local/var/run/openvswitch/vi1
This is root-owned, following instructions from the libvirt part of:
http://docs.openvswitch.org/en/latest/topics/dpdk/vhost-user/
libvirtd and qemu-kvm are running as root.
Regards,
Sundar
> -----Original Message-----
> From: ovs-dev-boun...@openvswitch.org [mailto:ovs-dev-
> boun...@openvswitch.org] On Behalf Of Nadathur, Sundar
> Sent: Tuesday, April 4, 2017 1:30 AM
> To: Ilya Maximets <i.maxim...@samsung.com>; ovs-dev@openvswitch.org
> Subject: Re: [ovs-dev] Traffic fails in vhost user port
>
> > -----Original Message-----
> > From: Ilya Maximets [mailto:i.maxim...@samsung.com]
> > Sent: Tuesday, April 4, 2017 12:07 AM
> > To: ovs-dev@openvswitch.org; Nadathur, Sundar
> > <sundar.nadat...@intel.com>
> > Subject: [ovs-dev] Traffic fails in vhost user port
> >
> > Hi Sundar.
>
> > > The flows are configured as below:
> > > # ovs-ofctl dump-flows br0
> > > NXST_FLOW reply (xid=0x4):
> > > cookie=0x0, duration=2833.612s, table=0, n_packets=0, n_bytes=0,
> > > idle_age=2833, in_port=1 actions=output:5 cookie=0x2,
> > > duration=2819.820s, table=0, n_packets=0, n_bytes=0, idle_age=2819,
> > > in_port=5 actions=output:1
> >
> > I guess, your flow table configured in a wrong way.
> > OpenFlow port of br0 is LOCAL, not 1.
> > Try this:
> >
> > # ovs-ofctl del-flows br0
> >
> > # ovs-ofctl add-flow br0 in_port=5,actions=output:LOCAL # ovs-ofctl
> > add-flow
> > br0 in_port=LOCAL,actions=output:5
>
> Thank you, Ilya. I did as you suggested, but the ping traffic from br0 (LOCAL)
> is dropped by the output port 5:
> # ovs-ofctl dump-flows br0
> NXST_FLOW reply (xid=0x4):
> cookie=0x0, duration=1922.876s, table=0, n_packets=0, n_bytes=0,
> idle_age=1922, in_port=5 actions=LOCAL cookie=0x0, duration=1915.458s,
> table=0, n_packets=6, n_bytes=252, idle_age=116, in_port=LOCAL
> actions=output:5
>
> # ovs-ofctl dump-ports br0 # <-- Drops in port 5 OFPST_PORT reply (xid=0x2):
> 2 ports
> port 5: rx pkts=?, bytes=0, drop=0, errs=0, frame=?, over=?, crc=?
> tx pkts=?, bytes=0, drop=5, errs=?, coll=?
> port LOCAL: rx pkts=43, bytes=2118, drop=0, errs=0, frame=0, over=0, crc=0
> tx pkts=0, bytes=0, drop=0, errs=0, coll=0
>
> Wireshark shows that br0 sends out 3 ARP requests but there is no response.
>
> > or
> >
> > # ovs-ofctl add-flow br0 actions=NORMAL
> I tried this too after doing del-flows. The LOCAL port's MAC is learnt,
> wireshark still shows br0 sending out ARP requests with no response.
>
> BTW, 'ovs-vsctl list Interface' shows the vi1 (VM port, #5) is up (most fields
> are blank):
> _uuid : 30d1600a-ff7d-4bf5-9fdb-b0767af3611c
> admin_state : up
> . . .
> link_speed : []
> link_state : up
> . . .
> mac_in_use : "00:00:00:00:00:00"
> mtu : 1500
> mtu_request : []
> name : "vi1"
> . . .
> statistics : {"rx_1024_to_1518_packets"=0, "rx_128_to_255_packets"=0,
> "rx_1523_to_max_packets"=0, "rx_1_to_64_packets"=0,
> "rx_256_to_511_packets"=0, "rx_512_to_1023_packets"=0,
> "rx_65_to_127_packets"=0, rx_bytes=0, rx_dropped=0, rx_errors=0,
> tx_bytes=0, tx_dropped=8}
> status : {}
> type : dpdkvhostuser
>
> Is there any way to do the equivalent of a tcpdump or wireshark on a vhost
> user port?
>
> Thanks,
> Sundar
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