From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F227EC2D0CE for ; Tue, 21 Jan 2020 12:40:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B756424653 for ; Tue, 21 Jan 2020 12:40:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Zpt8GOXD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B756424653 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53200 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1itspV-00036z-4J for qemu-devel@archiver.kernel.org; Tue, 21 Jan 2020 07:40:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51232) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1itsbn-0006Ol-KG for qemu-devel@nongnu.org; Tue, 21 Jan 2020 07:26:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1itsbj-00024D-OD for qemu-devel@nongnu.org; Tue, 21 Jan 2020 07:26:15 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:56871 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1itsbj-000241-KI for qemu-devel@nongnu.org; Tue, 21 Jan 2020 07:26:11 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579609571; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uXEazomUjKA42Wf0dOnpiYzMYkhMDgYp30svZrHpGF4=; b=Zpt8GOXDiiXUi6v8oslUfWeJmDKQDc/ZCBXv5UYVHSXuUX4xPVYLQB61Ou0Olj/Uee958h jbUzRjorwAjEpBvCTJXdxULUj/oJOBIwDqlYm3t0QvABBBm8Rfh9e7NP+QQ9kehWMG1o82 MQY3qKJMlR/aJbz4bfJ+KTwJNo7LH88= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-250-BxCbi6XlNN2qUlffGlZWHQ-1; Tue, 21 Jan 2020 07:26:06 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8A493A0CBF; Tue, 21 Jan 2020 12:26:05 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.36.118.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AA4360BE0; Tue, 21 Jan 2020 12:26:01 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, stefanha@redhat.com, vgoyal@redhat.com, berrange@redhat.com, slp@redhat.com, philmd@redhat.com Subject: [PATCH v2 019/109] virtiofsd: Add main virtio loop Date: Tue, 21 Jan 2020 12:23:03 +0000 Message-Id: <20200121122433.50803-20-dgilbert@redhat.com> In-Reply-To: <20200121122433.50803-1-dgilbert@redhat.com> References: <20200121122433.50803-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: BxCbi6XlNN2qUlffGlZWHQ-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: m.mizuma@jp.fujitsu.com, misono.tomohiro@jp.fujitsu.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Dr. David Alan Gilbert" Processes incoming requests on the vhost-user fd. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Daniel P. Berrang=C3=A9 --- tools/virtiofsd/fuse_virtio.c | 42 ++++++++++++++++++++++++++++++++--- 1 file changed, 39 insertions(+), 3 deletions(-) diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c index 2ae3c764dd..1928a2025c 100644 --- a/tools/virtiofsd/fuse_virtio.c +++ b/tools/virtiofsd/fuse_virtio.c @@ -11,12 +11,14 @@ * See the file COPYING.LIB */ =20 +#include "fuse_virtio.h" #include "fuse_i.h" #include "standard-headers/linux/fuse.h" #include "fuse_misc.h" #include "fuse_opt.h" -#include "fuse_virtio.h" =20 +#include +#include #include #include #include @@ -80,15 +82,49 @@ static const VuDevIface fv_iface =3D { .queue_is_processed_in_order =3D fv_queue_order, }; =20 +/* + * Main loop; this mostly deals with events on the vhost-user + * socket itself, and not actual fuse data. + */ int virtio_loop(struct fuse_session *se) { fuse_log(FUSE_LOG_INFO, "%s: Entry\n", __func__); =20 - while (1) { - /* TODO: Add stuffing */ + while (!fuse_session_exited(se)) { + struct pollfd pf[1]; + pf[0].fd =3D se->vu_socketfd; + pf[0].events =3D POLLIN; + pf[0].revents =3D 0; + + fuse_log(FUSE_LOG_DEBUG, "%s: Waiting for VU event\n", __func__); + int poll_res =3D ppoll(pf, 1, NULL, NULL); + + if (poll_res =3D=3D -1) { + if (errno =3D=3D EINTR) { + fuse_log(FUSE_LOG_INFO, "%s: ppoll interrupted, going arou= nd\n", + __func__); + continue; + } + fuse_log(FUSE_LOG_ERR, "virtio_loop ppoll: %m\n"); + break; + } + assert(poll_res =3D=3D 1); + if (pf[0].revents & (POLLERR | POLLHUP | POLLNVAL)) { + fuse_log(FUSE_LOG_ERR, "%s: Unexpected poll revents %x\n", __f= unc__, + pf[0].revents); + break; + } + assert(pf[0].revents & POLLIN); + fuse_log(FUSE_LOG_DEBUG, "%s: Got VU event\n", __func__); + if (!vu_dispatch(&se->virtio_dev->dev)) { + fuse_log(FUSE_LOG_ERR, "%s: vu_dispatch failed\n", __func__); + break; + } } =20 fuse_log(FUSE_LOG_INFO, "%s: Exit\n", __func__); + + return 0; } =20 int virtio_session_mount(struct fuse_session *se) --=20 2.24.1