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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 316D7C7EE2C for ; Sat, 3 Jun 2023 20:55:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231256AbjFCUzZ (ORCPT ); Sat, 3 Jun 2023 16:55:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232378AbjFCUy7 (ORCPT ); Sat, 3 Jun 2023 16:54:59 -0400 Received: from mx.sberdevices.ru (mx.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 095101A4; Sat, 3 Jun 2023 13:54:56 -0700 (PDT) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 297185FD38; Sat, 3 Jun 2023 23:54:48 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1685825688; bh=dXr+GIu8Zm+IAJzZ6mwmY2cDmvd5mo+b/fOvW2U8kdk=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=ks/7oWLtr330mkiMnbGgANJJCiYqGyGQCEeTfb987iEuqYyr5+9r9b7DRlEB/pxeo ISh3gxPb/3LEcuMNoNYgRLI9Gptgxf2R2yCOxKCBkr157M2hIZ9joS9NM+YUMBok6U p1+9uCsE3tGbYXuxNX4vmmhNr/MdcYvLqq3M1x+VM/m/CVsPozGt4/AG2BTkDCfrWU yOJ7dLtrywEsY6o8xwEDzs54xtn/BRpJp+8AzoWNj1jLkKPUfjjKVotOBiEDG7yGau /w++evFeX9TSkItCLzrkwu1fNuixwtgHr+eix+AZ0W44OaOfJ3shSDNmdXkoe7Obm9 57Nn/Y8yExQnw== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Sat, 3 Jun 2023 23:54:48 +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 v4 08/17] vsock: check for MSG_ZEROCOPY support on send Date: Sat, 3 Jun 2023 23:49:30 +0300 Message-ID: <20230603204939.1598818-9-AVKrasnov@sberdevices.ru> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20230603204939.1598818-1-AVKrasnov@sberdevices.ru> References: <20230603204939.1598818-1-AVKrasnov@sberdevices.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH02.sberdevices.ru (172.16.1.5) 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: 2023/06/03 16:55:00 #21417531 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 | 7 +++++++ net/vmw_vsock/af_vsock.c | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index 0e7504a42925..ec09edc5f3a0 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 ****/ @@ -243,4 +246,8 @@ static inline void __init vsock_bpf_build_proto(void) {} #endif +static inline bool vsock_msgzerocopy_allow(const struct vsock_transport *t) +{ + return t->msgzerocopy_allow && t->msgzerocopy_allow(); +} #endif /* __AF_VSOCK_H__ */ diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 07803d9fbf6d..033006e1b5ad 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1824,6 +1824,12 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg, goto out; } + if (msg->msg_flags & MSG_ZEROCOPY && + !vsock_msgzerocopy_allow(transport)) { + 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); -- 2.25.1