From patchwork Sun Apr 23 19:26:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseniy Krasnov X-Patchwork-Id: 13221453 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDA7FC6FD18 for ; Sun, 23 Apr 2023 19:31:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230219AbjDWTbl (ORCPT ); Sun, 23 Apr 2023 15:31:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229968AbjDWTb2 (ORCPT ); Sun, 23 Apr 2023 15:31:28 -0400 Received: from mx.sberdevices.ru (mx.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54FDFE52; Sun, 23 Apr 2023 12:31:27 -0700 (PDT) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 4CF2A5FD13; Sun, 23 Apr 2023 22:31:22 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1682278282; bh=8MkOLhUem8zje6YCZe3k8/M7+vTx+mrb7f0DcsdGdpY=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=KoO6dzXSzca3ttXVlKbvpwC3NwC5pb5eblm52zMokNdxh1SlYEEMB5LTkTdBoPwhd LKrrWG1ggHFLSx28sULqj7Fv7R2u36fHrcRfT7KWZXODEV/uujk9ikrmVrobYOZy/X h3KvORYZ3TyrHc9hiM1Klf/YJNRJq50O2R7uLL9t+k8uINNLiPz+6fUkRpwWUZ31fn m7TIlwljA/lnsHZaVQ3CgPLktq1gunvZJE+0SxvPQbHAso7iNSfkD2cmvRZniGyRbm AZKz3FwsuMvL+kmXyIdYB/LVJMqm9S2ltOGpSki/TL9iqwRbFHwO2T/6bRHqvczvGd AgBDybI60Gzfg== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Sun, 23 Apr 2023 22:31:22 +0300 (MSK) From: Arseniy Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , Bobby Eshleman CC: , , , , , , , Arseniy Krasnov Subject: [RFC PATCH v2 08/15] vsock: check for MSG_ZEROCOPY support Date: Sun, 23 Apr 2023 22:26:36 +0300 Message-ID: <20230423192643.1537470-9-AVKrasnov@sberdevices.ru> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20230423192643.1537470-1-AVKrasnov@sberdevices.ru> References: <20230423192643.1537470-1-AVKrasnov@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH01.sberdevices.ru (172.16.1.4) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/04/23 16:01:00 #21150277 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This feature totally depends on transport, so if transport doesn't support it, return error. Signed-off-by: Arseniy Krasnov --- include/net/af_vsock.h | 3 +++ net/vmw_vsock/af_vsock.c | 7 +++++++ 2 files changed, 10 insertions(+) diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index 0e7504a42925..270ca54cfab8 100644 --- a/include/net/af_vsock.h +++ b/include/net/af_vsock.h @@ -177,6 +177,9 @@ struct vsock_transport { /* Read a single skb */ int (*read_skb)(struct vsock_sock *, skb_read_actor_t); + + /* Zero-copy. */ + bool (*msgzerocopy_allow)(void); }; /**** CORE ****/ diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index c50d2632a75f..eac8c1affd6a 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1824,6 +1824,13 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg, goto out; } + if (msg->msg_flags & MSG_ZEROCOPY && + (!transport->msgzerocopy_allow || + !transport->msgzerocopy_allow())) { + err = -EOPNOTSUPP; + goto out; + } + /* Wait for room in the produce queue to enqueue our user's data. */ timeout = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);