Re: [PATCH v1 1/1] chardev: enable guest socket status/crontrol via DTR and DCD

[Eric Blake <eblake@redhat.com>]

On 12/16/20 4:06 PM, Darrin M. Gorski wrote:
> This patch adds a 'modemctl' option to "-chardev socket" to enable control
> of the socket via the guest serial port.
> The default state of the option is disabled.
> 
> 1. disconnect a connected socket when DTR transitions to low, also reject
> new connections while DTR is low.
> 2. provide socket connection status through the carrier detect line (CD or
> DCD) on the guest serial port
> 
> Buglink: https://bugs.launchpad.net/qemu/+bug/1213196
> 
> Signed-off-by: Darrin M. Gorski <darrin@gorski.net>
> 
> 
> diff --git a/chardev/char-socket.c b/chardev/char-socket.c

Hmm - your workflow did not produce the usual --- marker and a diffstat
of which files were in the patch; this makes it easier for reviewers to
see at a glance what the rest of the email will contain.  It's not
essential, but it does help.


> +++ b/qapi/char.json
> @@ -271,6 +271,9 @@
>  #             then attempt a reconnect after the given number of seconds.
>  #             Setting this to zero disables this function. (default: 0)
>  #             (Since: 2.2)
> +# @modemctl: allow guest to use modem control signals to control/monitor
> +#            the socket state (CD follows is_connected, DTR influences
> +#            connect/accept) (default: false) (Since: 5.2)

The next release will by 6.0, not 5.2.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org