Re: [PATCH 0/9] vhost-user: Migration support

On 17/01/2025 14:38, Stefano Brivio wrote:
...
 
  So we can
implement VHOST_USER_SEND_RARP with an empty function (at least to silence the
 "Vhost user backend fails to broadcast fake RARP" message). 
 Oh, sure, if
it's so annoying. And we can't just keep
 VHOST_USER_PROTOCOL_F_RARP off in the feature flags? 
VHOST_USER_PROTOCOL_F_RARP is already off in passt.

So vhost_user_migration_done() returns -ENOTSUP in QEMU.

And then in vhost_user_receive():

         r = vhost_net_notify_migration_done(s->vhost_net, mac_addr);

         if ((r != 0) && (display_rarp_failure)) {
             fprintf(stderr,
                     "Vhost user backend fails to broadcast fake RARP\n");
             fflush(stderr);
             display_rarp_failure = 0;
         }

Thanks,
Laurent