From patchwork Tue Dec 22 09:07:34 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 559934 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 B0ED1140BB4 for ; Tue, 22 Dec 2015 20:08:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932154AbbLVJH5 (ORCPT ); Tue, 22 Dec 2015 04:07:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37043 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932166AbbLVJHv (ORCPT ); Tue, 22 Dec 2015 04:07:51 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 78B1F8F280; Tue, 22 Dec 2015 09:07:51 +0000 (UTC) Received: from localhost (ovpn-112-50.ams2.redhat.com [10.36.112.50]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tBM97ln8005377; Tue, 22 Dec 2015 04:07:50 -0500 From: Stefan Hajnoczi To: kvm@vger.kernel.org Cc: Matt Benjamin , Christoffer Dall , netdev@vger.kernel.org, "Michael S. Tsirkin" , matt.ma@linaro.org, virtualization@lists.linux-foundation.org, Stefan Hajnoczi Subject: [RFC v4 1/5] VSOCK: transport-specific vsock_transport functions Date: Tue, 22 Dec 2015 17:07:34 +0800 Message-Id: <1450775258-18287-2-git-send-email-stefanha@redhat.com> In-Reply-To: <1450775258-18287-1-git-send-email-stefanha@redhat.com> References: <1450775258-18287-1-git-send-email-stefanha@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 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 7fd1220..9783a38 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1994,6 +1994,15 @@ 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");