Re: [Qemu-devel] [PATCH 2/4] qga: drop unnecessary GA_CHANNEL_UNIX_LISTEN checks

[Michael Roth <mdroth@linux.vnet.ibm.com>]

Quoting Stefan Hajnoczi (2016-10-06 11:40:16)
> Throughout the code there are c->listen_channel checks which manage the
> listen socket file descriptor (waiting for accept(2), closing the file
> descriptor, etc).  These checks are currently preceded by explicit
> c->method == GA_CHANNEL_UNIX_LISTEN checks.
> 
> Explicit GA_CHANNEL_UNIX_LISTEN checks are not necessary since serial
> channel types do not create the listen channel (c->listen_channel).
> 
> As more listen channel types are added, explicitly checking all of them
> becomes messy.  Rely on c->listen_channel to determine whether or not a
> listen socket file descriptor is used.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>

> ---
>  qga/channel-posix.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/qga/channel-posix.c b/qga/channel-posix.c
> index bf32158..579891d 100644
> --- a/qga/channel-posix.c
> +++ b/qga/channel-posix.c
> @@ -61,7 +61,6 @@ static void ga_channel_listen_add(GAChannel *c, int listen_fd, bool create)
> 
>  static void ga_channel_listen_close(GAChannel *c)
>  {
> -    g_assert(c->method == GA_CHANNEL_UNIX_LISTEN);
>      g_assert(c->listen_channel);
>      g_io_channel_shutdown(c->listen_channel, true, NULL);
>      g_io_channel_unref(c->listen_channel);
> @@ -77,7 +76,7 @@ static void ga_channel_client_close(GAChannel *c)
>      g_io_channel_shutdown(c->client_channel, true, NULL);
>      g_io_channel_unref(c->client_channel);
>      c->client_channel = NULL;
> -    if (c->method == GA_CHANNEL_UNIX_LISTEN && c->listen_channel) {
> +    if (c->listen_channel) {
>          ga_channel_listen_add(c, 0, false);
>      }
>  }
> @@ -255,8 +254,7 @@ GAChannel *ga_channel_new(GAChannelMethod method, const gchar *path,
> 
>  void ga_channel_free(GAChannel *c)
>  {
> -    if (c->method == GA_CHANNEL_UNIX_LISTEN
> -        && c->listen_channel) {
> +    if (c->listen_channel) {
>          ga_channel_listen_close(c);
>      }
>      if (c->client_channel) {
> -- 
> 2.7.4
>