Re: [Qemu-devel] [PATCH v5 2/2] net: add the support for -netdev socket, listen

[Zhi Yong Wu <zwu.kernel@gmail.com>]

On Fri, Jun 8, 2012 at 11:59 PM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
> On Fri, Jun 8, 2012 at 3:54 PM, Zhi Yong Wu <zwu.kernel@gmail.com> wrote:
>> On Fri, Jun 8, 2012 at 6:31 PM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
>>> On Thu, Jun 7, 2012 at 3:54 PM,  <zwu.kernel@gmail.com> wrote:
>>>> @@ -86,7 +82,16 @@ static void net_socket_send(void *opaque)
>>>>         /* end of connection */
>>>>     eoc:
>>>>         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
>>>> +        qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
>>>
>>> What happens when this is not a listen socket?  I suggest setting
>>> listen_fd to -1 during creation and not calling qemu_set_fd_handler()
>>> when listen_fd is -1 here.  If listen_fd is 0 then we'll register
>>> net_socket_accept when standard input becomes ready!
>>>
>>>>         closesocket(s->fd);
>>>> +
>>>> +        s->fd = 0;
>>>
>>> -1 should be used since 0 is a valid file descriptor (standard input).
>> I think that s->fd = 0 doesn't cause every issue. When it is zero,
>> this fd hasn't been registered with every handler. You can see that
>> "qemu_set_fd_handler(s->fd, NULL, NULL, NULL);" before "s->fd = 0".
>
> If s->fd = 0 because we are still listening and net_socket_cleanup()
OK, done. any other issue?
> is called we will close() standard input.
>
> Stefan



-- 
Regards,

Zhi Yong Wu