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 B6169C433EF for ; Tue, 26 Apr 2022 18:21:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238574AbiDZSYy (ORCPT ); Tue, 26 Apr 2022 14:24:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234247AbiDZSYx (ORCPT ); Tue, 26 Apr 2022 14:24:53 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 278B9344F0 for ; Tue, 26 Apr 2022 11:21:45 -0700 (PDT) Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 23QGQaie011703 for ; Tue, 26 Apr 2022 11:21:44 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=dB8+MrD5O9wi0ghEOijaYM33MpOL8F3wv6twB5MDRiQ=; b=JiHDFo8Q33K0l/J9VLk/8PkW5n4BiCwFYgs6SAwNP1rPDWUi6E0Gi6uD/gbApCRJvCzp 1/EfmRD2gNW6bWLR3INIbIOgxgNyJSy3fyoLvso12v2I/sKTZfkMQmdczQ3+1JY8Uj1c HUCqHcRHNiSVGCK2mjNXtCf2Nc4drT+Xkso= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3fmeyu3yk2-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 26 Apr 2022 11:21:44 -0700 Received: from twshared6486.05.ash9.facebook.com (2620:10d:c085:208::f) by mail.thefacebook.com (2620:10d:c085:11d::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 26 Apr 2022 11:21:42 -0700 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 4FBB9E2E5692; Tue, 26 Apr 2022 11:21:36 -0700 (PDT) From: Stefan Roesch To: , , CC: , , Jens Axboe Subject: [PATCH v4 03/12] io_uring: change ring size calculation for CQE32 Date: Tue, 26 Apr 2022 11:21:25 -0700 Message-ID: <20220426182134.136504-4-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220426182134.136504-1-shr@fb.com> References: <20220426182134.136504-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: lAbfdShEzAwRIVN4nrpQMi0RSZhb-_Rc X-Proofpoint-ORIG-GUID: lAbfdShEzAwRIVN4nrpQMi0RSZhb-_Rc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-04-26_05,2022-04-26_02,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This changes the function rings_size to take large CQE's into account. Co-developed-by: Jens Axboe Signed-off-by: Stefan Roesch Signed-off-by: Jens Axboe Reviewed-by: Kanchan Joshi --- fs/io_uring.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index bf2b02518332..9712483d3a17 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9693,8 +9693,8 @@ static void *io_mem_alloc(size_t size) return (void *) __get_free_pages(gfp, get_order(size)); } =20 -static unsigned long rings_size(unsigned sq_entries, unsigned cq_entries= , - size_t *sq_offset) +static unsigned long rings_size(struct io_ring_ctx *ctx, unsigned int sq= _entries, + unsigned int cq_entries, size_t *sq_offset) { struct io_rings *rings; size_t off, sq_array_size; @@ -9702,6 +9702,10 @@ static unsigned long rings_size(unsigned sq_entrie= s, unsigned cq_entries, off =3D struct_size(rings, cqes, cq_entries); if (off =3D=3D SIZE_MAX) return SIZE_MAX; + if (ctx->flags & IORING_SETUP_CQE32) { + if (check_shl_overflow(off, 1, &off)) + return SIZE_MAX; + } =20 #ifdef CONFIG_SMP off =3D ALIGN(off, SMP_CACHE_BYTES); @@ -11365,7 +11369,7 @@ static __cold int io_allocate_scq_urings(struct i= o_ring_ctx *ctx, ctx->sq_entries =3D p->sq_entries; ctx->cq_entries =3D p->cq_entries; =20 - size =3D rings_size(p->sq_entries, p->cq_entries, &sq_array_offset); + size =3D rings_size(ctx, p->sq_entries, p->cq_entries, &sq_array_offset= ); if (size =3D=3D SIZE_MAX) return -EOVERFLOW; =20 --=20 2.30.2