Re: [Qemu-devel] [PATCH v3] socket: allow wait=false for client socket

["Daniel P. Berrangé" <berrange@redhat.com>]

On Mon, Apr 15, 2019 at 06:21:29PM +0200, Marc-André Lureau wrote:
> Commit 767abe7 ("chardev: forbid 'wait' option with client sockets")
> is a bit too strict. Current libvirt always set wait=false, and will
> thus fail to add client chardev.
> 
> Make the code more permissive, allowing wait=false with client socket
> chardevs. Deprecate usage of 'wait' with client sockets.
> 
> Fixes: 767abe7f49e8be14d29da5db3527817b5d696a52
> Cc: Daniel P. Berrangé <berrange@redhat.com>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  chardev/char-socket.c | 10 +++++++---
>  qemu-deprecated.texi  |  5 +++++
>  2 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/chardev/char-socket.c b/chardev/char-socket.c
> index 3916505d67..ebc1adb83e 100644
> --- a/chardev/char-socket.c
> +++ b/chardev/char-socket.c
> @@ -1263,9 +1263,13 @@ static bool qmp_chardev_validate_socket(ChardevSocket *sock,
>              return false;
>          }
>          if (sock->has_wait) {
> -            error_setg(errp, "%s",
> -                       "'wait' option is incompatible with "
> -                       "socket in client connect mode");
> +            warn_report("'wait' option is deprecated with "
> +                        "socket in client connect mode");
> +            if (sock->wait) {
> +                error_setg(errp, "%s",
> +                           "'wait' option is incompatible with "
> +                           "socket in client connect mode");
> +            }
>              return false;

Oh wait, don't you need to put the 'return false' inside the
if branch above, otherwise we're still failing validation.

>          }
>      }
> diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
> index 2219386769..842e71b11d 100644
> --- a/qemu-deprecated.texi
> +++ b/qemu-deprecated.texi
> @@ -105,6 +105,11 @@ details.
>  The ``query-events'' command has been superseded by the more powerful
>  and accurate ``query-qmp-schema'' command.
>  
> +@subsection chardev client socket with 'wait' option (since 4.0)
> +
> +Character devices creating sockets in client mode should not specify
> +the 'wait' field, which is only applicable to sockets in server mode
> +
>  @section Human Monitor Protocol (HMP) commands
>  
>  @subsection The hub_id parameter of 'hostfwd_add' / 'hostfwd_remove' (since 3.1)
> -- 
> 2.21.0.313.ge35b8cb8e2
> 

Regards,
Daniel
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