From patchwork Thu Sep 1 07:42:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12962014 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 6168EECAAD3 for ; Thu, 1 Sep 2022 07:42:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234002AbiIAHmc (ORCPT ); Thu, 1 Sep 2022 03:42:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233848AbiIAHma (ORCPT ); Thu, 1 Sep 2022 03:42:30 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39DEEE68F8; Thu, 1 Sep 2022 00:42:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=Q0cJ+yGC6IUGRmsPYw8GA1ONb9WnpEqPOZmuK5m2FYw=; b=QxFW6/SjNqpBtJF8DfEGKFPX4U 9loTVeTVfaX8NVNt03i4qwX+aY186HoD522Rqxb2QOwOHPw7RwWvUXgK/IVWwD8LlOAbgD0qgRMzU H3f5yojgnOQqlFc4aG110rQ2IiQxsvi3lP1uJOwgN3J4NTnkMuaXHsEUHb0Qm0+dd3/NYAGh8Mzif VmTWBe+wwrh2s6X5+lbbzDYP9vpeelHMDXu6QhdJqh+rWXOo74Owx4GZAKL87mqlo/8IBNQJvYXlB uainKj0jMBipH6tI8Z6SCUu8UybPFVbSKuatzvgOA/HI76ieUXSXf1lIpHknwOiKN5/nFcdgaVl/I KV6MXBPQ==; Received: from 213-225-1-14.nat.highway.a1.net ([213.225.1.14] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTeqG-00ANUr-OO; Thu, 01 Sep 2022 07:42:25 +0000 From: Christoph Hellwig To: Chris Mason , Josef Bacik , David Sterba Cc: Damien Le Moal , Naohiro Aota , Johannes Thumshirn , Qu Wenruo , Jens Axboe , "Darrick J. Wong" , linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 01/17] block: export bio_split_rw Date: Thu, 1 Sep 2022 10:42:00 +0300 Message-Id: <20220901074216.1849941-2-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220901074216.1849941-1-hch@lst.de> References: <20220901074216.1849941-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org bio_split_rw can be used by file systems to split and incoming write bio into multiple bios fitting the hardware limit for use as ZONE_APPEND bios. Export it for initial use in btrfs. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Reviewed-by: Josef Bacik --- block/blk-merge.c | 3 ++- include/linux/bio.h | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/block/blk-merge.c b/block/blk-merge.c index ff04e9290715a..e68295462977b 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -267,7 +267,7 @@ static bool bvec_split_segs(struct queue_limits *lim, const struct bio_vec *bv, * responsible for ensuring that @bs is only destroyed after processing of the * split bio has finished. */ -static struct bio *bio_split_rw(struct bio *bio, struct queue_limits *lim, +struct bio *bio_split_rw(struct bio *bio, struct queue_limits *lim, unsigned *segs, struct bio_set *bs, unsigned max_bytes) { struct bio_vec bv, bvprv, *bvprvp = NULL; @@ -317,6 +317,7 @@ static struct bio *bio_split_rw(struct bio *bio, struct queue_limits *lim, bio_clear_polled(bio); return bio_split(bio, bytes >> SECTOR_SHIFT, GFP_NOIO, bs); } +EXPORT_SYMBOL_GPL(bio_split_rw); /** * __bio_split_to_limits - split a bio to fit the queue limits diff --git a/include/linux/bio.h b/include/linux/bio.h index ca22b06700a94..46890f8235401 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -12,6 +12,8 @@ #define BIO_MAX_VECS 256U +struct queue_limits; + static inline unsigned int bio_max_segs(unsigned int nr_segs) { return min(nr_segs, BIO_MAX_VECS); @@ -375,6 +377,8 @@ static inline void bip_set_seed(struct bio_integrity_payload *bip, void bio_trim(struct bio *bio, sector_t offset, sector_t size); extern struct bio *bio_split(struct bio *bio, int sectors, gfp_t gfp, struct bio_set *bs); +struct bio *bio_split_rw(struct bio *bio, struct queue_limits *lim, + unsigned *segs, struct bio_set *bs, unsigned max_bytes); /** * bio_next_split - get next @sectors from a bio, splitting if necessary