From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Hajnoczi Subject: [RFC v5 1/5] VSOCK: transport-specific vsock_transport functions Date: Fri, 1 Apr 2016 15:23:03 +0100 Message-ID: <1459520587-12337-2-git-send-email-stefanha@redhat.com> References: <1459520587-12337-1-git-send-email-stefanha@redhat.com> 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 , virtualization@lists.linux-foundation.org, Stefan Hajnoczi To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:50659 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759008AbcDAOXM (ORCPT ); Fri, 1 Apr 2016 10:23:12 -0400 In-Reply-To: <1459520587-12337-1-git-send-email-stefanha@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: 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 bbe65dc..1e5f5ed 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1987,6 +1987,15 @@ 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"); -- 2.5.5