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 267BFC433FE for ; Wed, 18 May 2022 17:11:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240835AbiERRLp (ORCPT ); Wed, 18 May 2022 13:11:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240900AbiERRLo (ORCPT ); Wed, 18 May 2022 13:11:44 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D74BB3D1F6 for ; Wed, 18 May 2022 10:11:42 -0700 (PDT) Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 24IFiFTW014392 for ; Wed, 18 May 2022 10:11:42 -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=ZEK2KiizNDz+tQg7vRD1YcQXRxUip3fOuE2ugbwUxQw=; b=Ez7qIpiCgQe1XAs5+rkMrjAS9f1KFAvciCsSv137kiNqq3oWxuzZEP6EDmLU1HQk81cu 0qj5KCKMToe5x4VXSoNqnnB1ObUUwt1Pjdnx/zbUYlWBzmnF4+EExc3MS5snrCUfqBS9 movLN+WayNGsQQk1W52eXiRQPj6KZWETCKg= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3g4ap6teyc-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 18 May 2022 10:11:41 -0700 Received: from twshared29473.14.frc2.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:11d::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Wed, 18 May 2022 10:11:39 -0700 Received: by devbig007.nao1.facebook.com (Postfix, from userid 544533) id 3F5DD414B928; Wed, 18 May 2022 10:11:32 -0700 (PDT) From: Keith Busch To: , CC: , Kernel Team , , , , Keith Busch Subject: [PATCHv2 1/3] block/bio: remove duplicate append pages code Date: Wed, 18 May 2022 10:11:29 -0700 Message-ID: <20220518171131.3525293-2-kbusch@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220518171131.3525293-1-kbusch@fb.com> References: <20220518171131.3525293-1-kbusch@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: aX79L8cORsFtWxl1M4k8-fbyX7lN5ieX X-Proofpoint-ORIG-GUID: aX79L8cORsFtWxl1M4k8-fbyX7lN5ieX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-18_06,2022-05-17_02,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Keith Busch The setup for getting pages are identical for zone append and normal IO. Use common code for each. Signed-off-by: Keith Busch --- block/bio.c | 90 ++++++++++++++++++++++------------------------------- 1 file changed, 38 insertions(+), 52 deletions(-) diff --git a/block/bio.c b/block/bio.c index a3893d80dccc..320514a47527 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1158,6 +1158,39 @@ static void bio_put_pages(struct page **pages, siz= e_t size, size_t off) put_page(pages[i]); } =20 +static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *= iter, + struct page **pages, ssize_t size, + size_t offset) +{ + struct request_queue *q =3D bdev_get_queue(bio->bi_bdev); + unsigned int max_append_sectors =3D queue_max_zone_append_sectors(q); + unsigned len, i; + ssize_t left; + int ret =3D 0; + + if (WARN_ON_ONCE(!max_append_sectors)) + return 0; + + for (left =3D size, i =3D 0; left > 0; left -=3D len, i++) { + struct page *page =3D pages[i]; + bool same_page =3D false; + + len =3D min_t(size_t, PAGE_SIZE - offset, left); + if (bio_add_hw_page(q, bio, page, len, offset, + max_append_sectors, &same_page) !=3D len) { + bio_put_pages(pages + i, left, offset); + ret =3D -EINVAL; + break; + } + if (same_page) + put_page(page); + offset =3D 0; + } + + iov_iter_advance(iter, size - left); + return ret; +} + #define PAGE_PTRS_PER_BVEC (sizeof(struct bio_vec) / sizeof(struct p= age *)) =20 /** @@ -1193,6 +1226,10 @@ static int __bio_iov_iter_get_pages(struct bio *bi= o, struct iov_iter *iter) if (unlikely(size <=3D 0)) return size ? size : -EFAULT; =20 + if (bio_op(bio) =3D=3D REQ_OP_ZONE_APPEND) + return __bio_iov_append_get_pages(bio, iter, pages, size, + offset); + for (left =3D size, i =3D 0; left > 0; left -=3D len, i++) { struct page *page =3D pages[i]; =20 @@ -1215,54 +1252,6 @@ static int __bio_iov_iter_get_pages(struct bio *bi= o, struct iov_iter *iter) return 0; } =20 -static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *= iter) -{ - unsigned short nr_pages =3D bio->bi_max_vecs - bio->bi_vcnt; - unsigned short entries_left =3D bio->bi_max_vecs - bio->bi_vcnt; - struct request_queue *q =3D bdev_get_queue(bio->bi_bdev); - unsigned int max_append_sectors =3D queue_max_zone_append_sectors(q); - struct bio_vec *bv =3D bio->bi_io_vec + bio->bi_vcnt; - struct page **pages =3D (struct page **)bv; - ssize_t size, left; - unsigned len, i; - size_t offset; - int ret =3D 0; - - if (WARN_ON_ONCE(!max_append_sectors)) - return 0; - - /* - * Move page array up in the allocated memory for the bio vecs as far a= s - * possible so that we can start filling biovecs from the beginning - * without overwriting the temporary page array. - */ - BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2); - pages +=3D entries_left * (PAGE_PTRS_PER_BVEC - 1); - - size =3D iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset); - if (unlikely(size <=3D 0)) - return size ? size : -EFAULT; - - for (left =3D size, i =3D 0; left > 0; left -=3D len, i++) { - struct page *page =3D pages[i]; - bool same_page =3D false; - - len =3D min_t(size_t, PAGE_SIZE - offset, left); - if (bio_add_hw_page(q, bio, page, len, offset, - max_append_sectors, &same_page) !=3D len) { - bio_put_pages(pages + i, left, offset); - ret =3D -EINVAL; - break; - } - if (same_page) - put_page(page); - offset =3D 0; - } - - iov_iter_advance(iter, size - left); - return ret; -} - /** * bio_iov_iter_get_pages - add user or kernel pages to a bio * @bio: bio to add pages to @@ -1297,10 +1286,7 @@ int bio_iov_iter_get_pages(struct bio *bio, struct= iov_iter *iter) } =20 do { - if (bio_op(bio) =3D=3D REQ_OP_ZONE_APPEND) - ret =3D __bio_iov_append_get_pages(bio, iter); - else - ret =3D __bio_iov_iter_get_pages(bio, iter); + ret =3D __bio_iov_iter_get_pages(bio, iter); } while (!ret && iov_iter_count(iter) && !bio_full(bio, 0)); =20 /* don't account direct I/O as memory stall */ --=20 2.30.2