From patchwork Thu Jul 28 14:36:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 653744 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3s0ZF344QHz9sXx for ; Fri, 29 Jul 2016 00:36:55 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758731AbcG1Ogp (ORCPT ); Thu, 28 Jul 2016 10:36:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36016 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758717AbcG1Ogl (ORCPT ); Thu, 28 Jul 2016 10:36:41 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AFA4C445D2; Thu, 28 Jul 2016 14:36:40 +0000 (UTC) Received: from localhost (ovpn-112-41.ams2.redhat.com [10.36.112.41]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u6SEadpp024670; Thu, 28 Jul 2016 10:36:39 -0400 From: Stefan Hajnoczi To: kvm@vger.kernel.org Cc: netdev@vger.kernel.org, "Michael S. Tsirkin" , Matt Benjamin , Christoffer Dall , =?UTF-8?q?Alex=20Benn=C3=A9e?= , marius vlad , areis@redhat.com, Claudio Imbrenda , Greg Kurz , Ian Campbell , ggarcia@abra.uab.cat, virtualization@lists.linux-foundation.org, Stefan Hajnoczi Subject: [RFC v6 1/6] VSOCK: transport-specific vsock_transport functions Date: Thu, 28 Jul 2016 15:36:30 +0100 Message-Id: <1469716595-13591-2-git-send-email-stefanha@redhat.com> In-Reply-To: <1469716595-13591-1-git-send-email-stefanha@redhat.com> References: <1469716595-13591-1-git-send-email-stefanha@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Thu, 28 Jul 2016 14:36:40 +0000 (UTC) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org struct vsock_transport contains function pointers called by AF_VSOCK core code. The transport may want its own transport-specific function pointers and they can be added after struct vsock_transport. Allow the transport to fetch vsock_transport. It can downcast it to access transport-specific function pointers. The virtio transport will use this. Signed-off-by: Stefan Hajnoczi --- include/net/af_vsock.h | 3 +++ net/vmw_vsock/af_vsock.c | 9 +++++++++ 2 files changed, 12 insertions(+) diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index e9eb2d6..23f5525 100644 --- a/include/net/af_vsock.h +++ b/include/net/af_vsock.h @@ -165,6 +165,9 @@ static inline int vsock_core_init(const struct vsock_transport *t) } void vsock_core_exit(void); +/* The transport may downcast this to access transport-specific functions */ +const struct vsock_transport *vsock_core_get_transport(void); + /**** UTILS ****/ void vsock_release_pending(struct sock *pending); diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index b96ac91..e34d96f 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1995,6 +1995,15 @@ void vsock_core_exit(void) } EXPORT_SYMBOL_GPL(vsock_core_exit); +const struct vsock_transport *vsock_core_get_transport(void) +{ + /* vsock_register_mutex not taken since only the transport uses this + * function and only while registered. + */ + return transport; +} +EXPORT_SYMBOL_GPL(vsock_core_get_transport); + MODULE_AUTHOR("VMware, Inc."); MODULE_DESCRIPTION("VMware Virtual Socket Family"); MODULE_VERSION("1.0.1.0-k");