From patchwork Mon Sep 18 11:04:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 13389459 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 DAADBCD3426 for ; Mon, 18 Sep 2023 11:06:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241170AbjIRLF4 (ORCPT ); Mon, 18 Sep 2023 07:05:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236209AbjIRLF0 (ORCPT ); Mon, 18 Sep 2023 07:05:26 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D814102; Mon, 18 Sep 2023 04:05:19 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 6F12721AAE; Mon, 18 Sep 2023 11:05:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1695035117; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sO3vom66G3v5wN0Rdlws4SQilffG/SX/AZnhq8li8s0=; b=cj8Xl1vQV0GmNA9HBXj8qCFC/7Y3exTb67ZcPO94wqHHvTrAZ/dB1kK1qT6l5mP1JwBQ4J usw1tv6VgKf8IcXVvgCQOZsIKdukqXuDAPHAEfoaoAkgmjaGvwy/mEf5Mlr/yUjfLPh0Kj tyD0jeT+/Fvc/hDcQtHzmoAqYmUXuc4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1695035117; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sO3vom66G3v5wN0Rdlws4SQilffG/SX/AZnhq8li8s0=; b=piMdi4Fsth+ZBmMAKv2Q8dM0wTMAQce5SwRLodipTLgzMORWiDmU7WzMTnR9V1Eq1Y4u5E gc7ZlULoKZUZdDBw== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id F104D2C146; Mon, 18 Sep 2023 11:05:16 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id 01FB851CD143; Mon, 18 Sep 2023 13:05:17 +0200 (CEST) From: Hannes Reinecke To: Matthew Wilcox Cc: Luis Chamberlain , Christoph Hellwig , Jens Axboe , Pankaj Raghav , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, Hannes Reinecke Subject: [PATCH 03/18] block/buffer_head: introduce block_{index_to_sector,sector_to_index} Date: Mon, 18 Sep 2023 13:04:55 +0200 Message-Id: <20230918110510.66470-4-hare@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230918110510.66470-1-hare@suse.de> References: <20230918110510.66470-1-hare@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Introduce accessor functions block_index_to_sector() and block_sector_to_index() to convert the page index into the corresponding sector and vice versa. Signed-off-by: Hannes Reinecke --- include/linux/buffer_head.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 4ede47649a81..55a3032f8375 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -277,6 +277,7 @@ int generic_cont_expand_simple(struct inode *inode, loff_t size); void block_commit_write(struct page *page, unsigned int from, unsigned int to); int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, get_block_t get_block); + sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *); int block_truncate_page(struct address_space *, loff_t, get_block_t *); @@ -449,6 +450,22 @@ __bread(struct block_device *bdev, sector_t block, unsigned size) bool block_dirty_folio(struct address_space *mapping, struct folio *folio); +static inline sector_t block_index_to_sector(pgoff_t index, unsigned int blkbits) +{ + if (PAGE_SHIFT < blkbits) + return (sector_t)index >> (blkbits - PAGE_SHIFT); + else + return (sector_t)index << (PAGE_SHIFT - blkbits); +} + +static inline pgoff_t block_sector_to_index(sector_t block, unsigned int blkbits) +{ + if (PAGE_SHIFT < blkbits) + return (pgoff_t)block << (blkbits - PAGE_SHIFT); + else + return (pgoff_t)block >> (PAGE_SHIFT - blkbits); +} + #ifdef CONFIG_BUFFER_HEAD void buffer_init(void);