From nobody Mon Feb 9 17:58:06 2026 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 2424AC7EE26 for ; Mon, 22 May 2023 07:46:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232279AbjEVHqI (ORCPT ); Mon, 22 May 2023 03:46:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232564AbjEVHo6 (ORCPT ); Mon, 22 May 2023 03:44:58 -0400 Received: from mx.sberdevices.ru (mx.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 060F2B0; Mon, 22 May 2023 00:44:58 -0700 (PDT) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id AD5295FD57; Mon, 22 May 2023 10:44:55 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1684741495; bh=Lcii1bQY+QJwpWB+RMSKu82Ek54JP6VHZpwuHhErzzg=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=i4G+Rrrt8FjyGOQCUGkcbP/uLAllSTwiqRcxvCBd+AEUplaO/lK78vVC+rYo2n2dg 6CrJTQTnWmiBC2R5qp9XHHLBF+66RXNEtTJ+WpChSoU8ZgqL16OD0QCWv6ZKlxIePt moh9Dglj70wLhzMyeUKIhY1loWO0U2fhzJBFjkP4JhMl3rPqMuXJJS37WPyYlE1EzK P+RcV8M9PyZaFgqhMPwV2PQFBOI6tThFm819ly79cLBn3kQ6SsVUcoUqMihPtCR1V3 2v6/YdVS+bStijZuOPRP3+7zzCtyMNO1WtUH/5LdZdn9BZIYJnooy1wtYip/wJRbr1 dRbf559Dj2Qbw== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Mon, 22 May 2023 10:44:55 +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 v3 13/17] net/sock: enable setting SO_ZEROCOPY for PF_VSOCK Date: Mon, 22 May 2023 10:39:46 +0300 Message-ID: <20230522073950.3574171-14-AVKrasnov@sberdevices.ru> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20230522073950.3574171-1-AVKrasnov@sberdevices.ru> References: <20230522073950.3574171-1-AVKrasnov@sberdevices.ru> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: 2023/05/22 04:49:00 #21364689 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" PF_VSOCK supports MSG_ZEROCOPY transmission, so SO_ZEROCOPY could be enabled. PF_VSOCK implementation is a little bit special comparing to PF_INET - MSG_ZEROCOPY support depends on transport layer of PF_VSOCK, but here we can't "ask" its transport, so setting of this option is always allowed, but if some transport doesn't support zerocopy tx, send callback of PF_VSOCK will return -EOPNOTSUPP. Signed-off-by: Arseniy Krasnov --- net/core/sock.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/core/sock.c b/net/core/sock.c index 5440e67bcfe3..d558e541e6d7 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1452,9 +1452,11 @@ int sk_setsockopt(struct sock *sk, int level, int op= tname, (sk->sk_type =3D=3D SOCK_DGRAM && sk->sk_protocol =3D=3D IPPROTO_UDP))) ret =3D -EOPNOTSUPP; - } else if (sk->sk_family !=3D PF_RDS) { + } else if (sk->sk_family !=3D PF_RDS && + sk->sk_family !=3D PF_VSOCK) { ret =3D -EOPNOTSUPP; } + if (!ret) { if (val < 0 || val > 1) ret =3D -EINVAL; --=20 2.25.1