From nobody Wed Dec 31 02:35:13 2025 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 5887AC4332F for ; Mon, 13 Nov 2023 13:01:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231521AbjKMNB0 (ORCPT ); Mon, 13 Nov 2023 08:01:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230443AbjKMNAz (ORCPT ); Mon, 13 Nov 2023 08:00:55 -0500 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC7FF1727; Mon, 13 Nov 2023 05:00:51 -0800 (PST) Received: from dggpemm500005.china.huawei.com (unknown [172.30.72.54]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4STV0G0LFJzWhLY; Mon, 13 Nov 2023 21:00:30 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpemm500005.china.huawei.com (7.185.36.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Mon, 13 Nov 2023 21:00:50 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Eric Dumazet Subject: [PATCH RFC 8/8] net: temp hack for dmabuf page in __skb_datagram_iter() Date: Mon, 13 Nov 2023 21:00:40 +0800 Message-ID: <20231113130041.58124-9-linyunsheng@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20231113130041.58124-1-linyunsheng@huawei.com> References: <20231113130041.58124-1-linyunsheng@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500005.china.huawei.com (7.185.36.74) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Signed-off-by: Yunsheng Lin --- net/core/datagram.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/core/datagram.c b/net/core/datagram.c index 103d46fa0eeb..5556782ac658 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -436,7 +436,15 @@ static int __skb_datagram_iter(const struct sk_buff *s= kb, int offset, end =3D start + skb_frag_size(frag); if ((copy =3D end - offset) > 0) { struct page *page =3D skb_frag_page(frag); - u8 *vaddr =3D kmap(page); + u8 *vaddr; + + if ((page->pp_magic & ~0x3UL) =3D=3D PP_SIGNATURE) { + struct page_pool_iov *ppiov =3D (struct page_pool_iov *)page; + + page =3D ppiov->page; + } + + vaddr =3D kmap(page); =20 if (copy > len) copy =3D len; --=20 2.33.0