[ovs-dev] [PATCH] Fix: vhost user port status

[王志克]

Hi Darrell,

Thanks for your comment. I just create a new patch accordingly.

Yes, I am testing vhost user client port.
After ovs-vswitchd restarts, I did nothing. I just used command "ovs-ofctl show br" to get the port status, and found the status is "LINK DOWN".
With the patch, the status is 0 as expected.

Br,
Wang Zhike

-----Original Message-----
From: Darrell Ball [mailto:dball at vmware.com] 
Sent: Friday, August 25, 2017 9:35 AM
To: 王志克; dev at openvswitch.org
Subject: Re: [ovs-dev] [PATCH] Fix: vhost user port status

Hi Lawrence 

I am not very particular about the title prefix, but could we use something more
technically specific than ‘Fix’; maybe netdev-dpdk  ?
Title should also end with a period.

On 8/23/17, 9:13 PM, "ovs-dev-bounces at openvswitch.org on behalf of wangzhike" <ovs-dev-bounces at openvswitch.org on behalf of wangzhike at jd.com> wrote:

    After ovs-vswitchd reboots, vhost user status is displayed as
    LINK DOWN though the traffic is OK.
    
    The problem is that the port may be udpated while the vhost_reconfigured
    is false. Then the vhost_reconfigured is updated to true. As a result,
    the vhost user status is kept as LINK-DOWN.

[Darrell]
Just so I understand, are you actually using vhost-user or really vhost-user-client ports ?
JTBS, can you describe what you did after vswitchd restart ?

    
    Signed-off-by: wangzhike <wangzhike at jd.com>
    ---
     lib/netdev-dpdk.c | 6 +++++-
     1 file changed, 5 insertions(+), 1 deletion(-)
    
    diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
    index 1aaf6f7..e90fd0e 100644
    --- a/lib/netdev-dpdk.c
    +++ b/lib/netdev-dpdk.c
    @@ -3227,7 +3227,11 @@ dpdk_vhost_reconfigure_helper(struct netdev_dpdk *dev)
         }
     
         if (netdev_dpdk_get_vid(dev) >= 0) {
    -        dev->vhost_reconfigured = true;
    +        if (dev->vhost_reconfigured == false) {
    +            dev->vhost_reconfigured = true;
    +            /* change vhost_reconfigured may affect carrier status */

[Darrell]
Maybe we can say ?
/* Carrier status may need updating. */
Would this be ok ?
BTW, comments should end with a period.

    +            netdev_change_seq_changed(&dev->up);
    +        }
         }
     
         return 0;
    -- 
    1.8.3.1
    
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