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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26FDFC433F5 for ; Wed, 13 Oct 2021 06:29:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 072D360FDC for ; Wed, 13 Oct 2021 06:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237999AbhJMGbo (ORCPT ); Wed, 13 Oct 2021 02:31:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237867AbhJMGbn (ORCPT ); Wed, 13 Oct 2021 02:31:43 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF8F1C061746 for ; Tue, 12 Oct 2021 23:29:40 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id y4so1149016plb.0 for ; Tue, 12 Oct 2021 23:29:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=W+Po2ncML0dagir1ZXD2ovXOKvk/W+c/3o5vm+NA9cQ=; b=QomLyJ/uwXmEgOIdGiIKpgwe7fIN3sqRRqysUR703Xs3YgTlXaMfe2P+HII9dJHv27 pe85K+wWKdH0PewpBtncrX+pK9/vv2ewnDdpNrXhC91Xk/Ncvs9CyiBnb8qEmm15S3FV 6BEJ5rXVDozZ1lv8jDs3uSJtiPb9Dk/ZAAcM0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=W+Po2ncML0dagir1ZXD2ovXOKvk/W+c/3o5vm+NA9cQ=; b=RRIa/9mW6hjFLVOpWeWvW38CerPEEaocRuAQvrYUpBocuxRIigzHfqN8NEdBoG5SGP xtfX+WRq/TOeRRRVDp4p2VqW8g88zI2gzsooxsnMaNox6uMW6Th9NHE0R0/AwMFfgZaf I93L3xX+H+QtVDaX/Lz5QYIgYfrCnKBMdSlwgZbL4/Ja8alOj0ojpxq1MTAja/kB1wiU 8PuvPmeQbbuiMUVYVqGwQ8eL0zXH3UTwtBCbmvD9GFQtGXFZ3uDK5Dnx5A8A93G//JSu eyNPteFOlz+H3Y5AsGH310ZK6zBMgOhtiL0Qf0Lnz1Q8InizkegUHi6ynxhwEMI+4e9t hecg== X-Gm-Message-State: AOAM5324DQbdkKa0p7WKj0UsHjSx69WMm7QGBbotdRBev4kMRygxdnLP 65B5YRZ1omBJBd+vimCY8+euVg== X-Google-Smtp-Source: ABdhPJwwvDzOMlBdl8uBpL682Y/M/U5HFlms6OXsU9pvWhVrOJHosSbnvoIECvMOshQ6rTYdsLz56g== X-Received: by 2002:a17:90b:4b4c:: with SMTP id mi12mr11492173pjb.57.1634106580411; Tue, 12 Oct 2021 23:29:40 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id x7sm12999948pfj.28.2021.10.12.23.29.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Oct 2021 23:29:39 -0700 (PDT) Date: Tue, 12 Oct 2021 23:29:39 -0700 From: Kees Cook To: Christoph Hellwig Cc: Jens Axboe , Coly Li , Mike Snitzer , Song Liu , David Sterba , Josef Bacik , Theodore Ts'o , OGAWA Hirofumi , Dave Kleikamp , Ryusuke Konishi , Anton Altaparmakov , Konstantin Komarov , Phillip Lougher , Jan Kara , linux-block@vger.kernel.org, dm-devel@redhat.com, drbd-dev@lists.linbit.com, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, ntfs3@lists.linux.dev, reiserfs-devel@vger.kernel.org Subject: Re: [PATCH 25/29] ext4: use sb_bdev_nr_blocks Message-ID: <202110122328.92B4FC41F4@keescook> References: <20211013051042.1065752-1-hch@lst.de> <20211013051042.1065752-26-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211013051042.1065752-26-hch@lst.de> Precedence: bulk List-ID: X-Mailing-List: linux-bcache@vger.kernel.org On Wed, Oct 13, 2021 at 07:10:38AM +0200, Christoph Hellwig wrote: > Use the sb_bdev_nr_blocks helper instead of open coding it. > > Signed-off-by: Christoph Hellwig > --- > fs/ext4/super.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/ext4/super.c b/fs/ext4/super.c > index 0775950ee84e3..3dde8be5df490 100644 > --- a/fs/ext4/super.c > +++ b/fs/ext4/super.c > @@ -4468,7 +4468,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) > goto cantfind_ext4; > > /* check blocks count against device size */ > - blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; > + blocks_count = sb_bdev_nr_blocks(sb); Is s_blocksize_bits always 9 here? If not, this isn't equivalent. -Kees > if (blocks_count && ext4_blocks_count(es) > blocks_count) { > ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " > "exceeds size of device (%llu blocks)", > -- > 2.30.2 > -- Kees Cook