Re: [Qemu-devel] [PATCH v2 1/5] socket: Add backlog parameter to socket_listen

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

On Tue, Aug 20, 2019 at 10:24:55AM +0200, Juan Quintela wrote:
> Current parameter was always one.  We continue with that value for now
> in all callers.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> ---
>  include/qemu/sockets.h    |  2 +-
>  io/channel-socket.c       |  2 +-
>  qga/channel-posix.c       |  2 +-
>  tests/test-util-sockets.c | 12 ++++++------
>  util/qemu-sockets.c       | 33 ++++++++++++++++++++++-----------
>  util/trace-events         |  2 ++
>  6 files changed, 33 insertions(+), 20 deletions(-)
> 
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index e3a1666578..3f0a80404f 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -31,6 +31,7 @@
>  #include "qapi/qobject-input-visitor.h"
>  #include "qapi/qobject-output-visitor.h"
>  #include "qemu/cutils.h"
> +#include "trace.h"
>  
>  #ifndef AI_ADDRCONFIG
>  # define AI_ADDRCONFIG 0
> @@ -207,6 +208,7 @@ static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e)
>  
>  static int inet_listen_saddr(InetSocketAddress *saddr,
>                               int port_offset,
> +                             int num,
>                               Error **errp)
>  {
>      struct addrinfo ai,*res,*e;
> @@ -309,7 +311,8 @@ static int inet_listen_saddr(InetSocketAddress *saddr,
>                      goto listen_failed;
>                  }
>              } else {
> -                if (!listen(slisten, 1)) {
> +                trace_inet_listen_saddr(num);

It is a bit odd to only have the trace event for inet sockets. I'd
prefer it in the caller for all sockets, with just "socket_listen"
name.

> +                if (!listen(slisten, num)) {
>                      goto listen_ok;
>                  }
>                  if (errno != EADDRINUSE) {

Regards,
Daniel
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