From patchwork Mon Mar 20 18:19:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 741123 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vn49P1Jrvz9s3w for ; Tue, 21 Mar 2017 05:24:41 +1100 (AEDT) Received: from localhost ([::1]:34328 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cq1yw-0001lw-JD for incoming@patchwork.ozlabs.org; Mon, 20 Mar 2017 14:24:38 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34528) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cq1tw-0006ap-ES for qemu-devel@nongnu.org; Mon, 20 Mar 2017 14:19:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cq1tv-0007l5-Ff for qemu-devel@nongnu.org; Mon, 20 Mar 2017 14:19:28 -0400 Received: from mail.kernel.org ([198.145.29.136]:46228) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cq1tv-0007kk-8z for qemu-devel@nongnu.org; Mon, 20 Mar 2017 14:19:27 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8092A20279; Mon, 20 Mar 2017 18:19:25 +0000 (UTC) Received: from sstabellini-ThinkPad-X260.hsd1.ca.comcast.net (96-82-76-110-static.hfc.comcastbusiness.net [96.82.76.110]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4A71020392; Mon, 20 Mar 2017 18:19:24 +0000 (UTC) From: Stefano Stabellini To: qemu-devel@nongnu.org Date: Mon, 20 Mar 2017 11:19:11 -0700 Message-Id: <1490033952-26735-7-git-send-email-sstabellini@kernel.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1490033952-26735-1-git-send-email-sstabellini@kernel.org> References: <1490033952-26735-1-git-send-email-sstabellini@kernel.org> X-Virus-Scanned: ClamAV using ClamSMTP X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 198.145.29.136 Subject: [Qemu-devel] [PATCH v4 7/8] xen/9pfs: send responses back to the frontend X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jgross@suse.com, sstabellini@kernel.org, groug@kaod.org, Stefano Stabellini , "Aneesh Kumar K.V" , anthony.perard@citrix.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Once a request is completed, xen_9pfs_push_and_notify gets called. In xen_9pfs_push_and_notify, update the indexes (data has already been copied to the sg by the common code) and send a notification to the frontend. Schedule the bottom-half to check if we already have any other requests pending. Signed-off-by: Stefano Stabellini CC: anthony.perard@citrix.com CC: jgross@suse.com CC: Aneesh Kumar K.V CC: Greg Kurz --- hw/9pfs/xen-9p-backend.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c index 3564452..6bdcb52 100644 --- a/hw/9pfs/xen-9p-backend.c +++ b/hw/9pfs/xen-9p-backend.c @@ -184,6 +184,25 @@ static void xen_9pfs_init_in_iov_from_pdu(V9fsPDU *pdu, static void xen_9pfs_push_and_notify(V9fsPDU *pdu) { + RING_IDX prod; + Xen9pfsDev *priv = container_of(pdu->s, Xen9pfsDev, state); + Xen9pfsRing *ring = &priv->rings[pdu->tag % priv->num_rings]; + + g_free(ring->sg); + ring->sg = NULL; + + ring->intf->out_cons = ring->out_cons; + xen_wmb(); + + prod = ring->intf->in_prod; + xen_rmb(); + ring->intf->in_prod = prod + pdu->size; + xen_wmb(); + + ring->inprogress = false; + xenevtchn_notify(ring->evtchndev, ring->local_port); + + qemu_bh_schedule(ring->bh); } static const struct V9fsTransport xen_9p_transport = {