From patchwork Thu Jan 23 11:57:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 1227914 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=iUmBLBvP; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 483N1s1wvTz9sSQ for ; Fri, 24 Jan 2020 00:10:57 +1100 (AEDT) Received: from localhost ([::1]:56806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iucG6-0006CT-DL for incoming@patchwork.ozlabs.org; Thu, 23 Jan 2020 08:10:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40231) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iub8m-0001yB-50 for qemu-devel@nongnu.org; Thu, 23 Jan 2020 06:59:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iub8k-0004xH-7B for qemu-devel@nongnu.org; Thu, 23 Jan 2020 06:59:15 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:47254 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 1iub8k-0004wV-0x for qemu-devel@nongnu.org; Thu, 23 Jan 2020 06:59:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579780753; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Pa5Tc/5wbQWlujFEIsGw4Jvrr1IG5Qh8MD2XG2sAtKs=; b=iUmBLBvPbJp0cnf80Zs6j5O6MFM/3dcqHKOKRLKDt98HHTJrADUlLCBt0lp7U8zznRUqiz UKpSu14oCJ+dMIEbCSXeWCdFJw2+ODCOWvbxQEA1J81Ef/ACHFzsHy+hn8PJSd6qdm34pK uSDGsjn5JrI9D8CZ6uSSxeV/N8NWEzs= 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-428-pe6ZHvbROrKMBfXwApeMFg-1; Thu, 23 Jan 2020 06:59:11 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8265F100551A for ; Thu, 23 Jan 2020 11:59:10 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.36.118.0]) by smtp.corp.redhat.com (Postfix) with ESMTP id C7CC61CB; Thu, 23 Jan 2020 11:59:09 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, stefanha@redhat.com Subject: [PULL 019/111] virtiofsd: Start wiring up vhost-user Date: Thu, 23 Jan 2020 11:57:09 +0000 Message-Id: <20200123115841.138849-20-dgilbert@redhat.com> In-Reply-To: <20200123115841.138849-1-dgilbert@redhat.com> References: <20200123115841.138849-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: pe6ZHvbROrKMBfXwApeMFg-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: "Dr. David Alan Gilbert" Listen on our unix socket for the connection from QEMU, when we get it initialise vhost-user and dive into our own loop variant (currently dummy). Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Daniel P. Berrangé Signed-off-by: Dr. David Alan Gilbert --- tools/virtiofsd/fuse_i.h | 4 ++ tools/virtiofsd/fuse_lowlevel.c | 5 ++ tools/virtiofsd/fuse_lowlevel.h | 7 +++ tools/virtiofsd/fuse_virtio.c | 87 +++++++++++++++++++++++++++++++- tools/virtiofsd/fuse_virtio.h | 2 + tools/virtiofsd/passthrough_ll.c | 7 +-- 6 files changed, 106 insertions(+), 6 deletions(-) diff --git a/tools/virtiofsd/fuse_i.h b/tools/virtiofsd/fuse_i.h index 82d6ac7115..ec04449069 100644 --- a/tools/virtiofsd/fuse_i.h +++ b/tools/virtiofsd/fuse_i.h @@ -13,6 +13,8 @@ #include "fuse.h" #include "fuse_lowlevel.h" +struct fv_VuDev; + struct fuse_req { struct fuse_session *se; uint64_t unique; @@ -65,6 +67,8 @@ struct fuse_session { size_t bufsize; int error; char *vu_socket_path; + int vu_socketfd; + struct fv_VuDev *virtio_dev; }; struct fuse_chan { diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c index 5df124e64b..af09fa2b94 100644 --- a/tools/virtiofsd/fuse_lowlevel.c +++ b/tools/virtiofsd/fuse_lowlevel.c @@ -2242,6 +2242,11 @@ void fuse_session_unmount(struct fuse_session *se) { } +int fuse_lowlevel_is_virtio(struct fuse_session *se) +{ + return se->vu_socket_path != NULL; +} + #ifdef linux int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[]) { diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h index 2fa225d40b..f6b34700af 100644 --- a/tools/virtiofsd/fuse_lowlevel.h +++ b/tools/virtiofsd/fuse_lowlevel.h @@ -1755,6 +1755,13 @@ void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func, */ int fuse_req_interrupted(fuse_req_t req); +/** + * Check if the session is connected via virtio + * + * @param se session object + * @return 1 if the session is a virtio session + */ +int fuse_lowlevel_is_virtio(struct fuse_session *se); /* * Inquiry functions diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c index cbef6ffdda..2ae3c764dd 100644 --- a/tools/virtiofsd/fuse_virtio.c +++ b/tools/virtiofsd/fuse_virtio.c @@ -19,18 +19,78 @@ #include #include +#include #include #include #include #include #include +#include "contrib/libvhost-user/libvhost-user.h" + +/* + * We pass the dev element into libvhost-user + * and then use it to get back to the outer + * container for other data. + */ +struct fv_VuDev { + VuDev dev; + struct fuse_session *se; +}; + /* From spec */ struct virtio_fs_config { char tag[36]; uint32_t num_queues; }; +/* + * Callback from libvhost-user if there's a new fd we're supposed to listen + * to, typically a queue kick? + */ +static void fv_set_watch(VuDev *dev, int fd, int condition, vu_watch_cb cb, + void *data) +{ + fuse_log(FUSE_LOG_WARNING, "%s: TODO! fd=%d\n", __func__, fd); +} + +/* + * Callback from libvhost-user if we're no longer supposed to listen on an fd + */ +static void fv_remove_watch(VuDev *dev, int fd) +{ + fuse_log(FUSE_LOG_WARNING, "%s: TODO! fd=%d\n", __func__, fd); +} + +/* Callback from libvhost-user to panic */ +static void fv_panic(VuDev *dev, const char *err) +{ + fuse_log(FUSE_LOG_ERR, "%s: libvhost-user: %s\n", __func__, err); + /* TODO: Allow reconnects?? */ + exit(EXIT_FAILURE); +} + +static bool fv_queue_order(VuDev *dev, int qidx) +{ + return false; +} + +static const VuDevIface fv_iface = { + /* TODO: Add other callbacks */ + .queue_is_processed_in_order = fv_queue_order, +}; + +int virtio_loop(struct fuse_session *se) +{ + fuse_log(FUSE_LOG_INFO, "%s: Entry\n", __func__); + + while (1) { + /* TODO: Add stuffing */ + } + + fuse_log(FUSE_LOG_INFO, "%s: Exit\n", __func__); +} + int virtio_session_mount(struct fuse_session *se) { struct sockaddr_un un; @@ -75,5 +135,30 @@ int virtio_session_mount(struct fuse_session *se) return -1; } - return -1; + fuse_log(FUSE_LOG_INFO, "%s: Waiting for vhost-user socket connection...\n", + __func__); + int data_sock = accept(listen_sock, NULL, NULL); + if (data_sock == -1) { + fuse_log(FUSE_LOG_ERR, "vhost socket accept: %m\n"); + close(listen_sock); + return -1; + } + close(listen_sock); + fuse_log(FUSE_LOG_INFO, "%s: Received vhost-user socket connection\n", + __func__); + + /* TODO: Some cleanup/deallocation! */ + se->virtio_dev = calloc(sizeof(struct fv_VuDev), 1); + if (!se->virtio_dev) { + fuse_log(FUSE_LOG_ERR, "%s: virtio_dev calloc failed\n", __func__); + close(data_sock); + return -1; + } + + se->vu_socketfd = data_sock; + se->virtio_dev->se = se; + vu_init(&se->virtio_dev->dev, 2, se->vu_socketfd, fv_panic, fv_set_watch, + fv_remove_watch, &fv_iface); + + return 0; } diff --git a/tools/virtiofsd/fuse_virtio.h b/tools/virtiofsd/fuse_virtio.h index 8f2edb69ca..23026d6e4c 100644 --- a/tools/virtiofsd/fuse_virtio.h +++ b/tools/virtiofsd/fuse_virtio.h @@ -20,4 +20,6 @@ struct fuse_session; int virtio_session_mount(struct fuse_session *se); +int virtio_loop(struct fuse_session *se); + #endif diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index fc9b264d56..037c5d7b26 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -36,6 +36,7 @@ */ #include "qemu/osdep.h" +#include "fuse_virtio.h" #include "fuse_lowlevel.h" #include #include @@ -1395,11 +1396,7 @@ int main(int argc, char *argv[]) fuse_daemonize(opts.foreground); /* Block until ctrl+c or fusermount -u */ - if (opts.singlethread) { - ret = fuse_session_loop(se); - } else { - ret = fuse_session_loop_mt(se, opts.clone_fd); - } + ret = virtio_loop(se); fuse_session_unmount(se); err_out3: