From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61F938F6B; Thu, 18 Apr 2024 06:31:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713421900; cv=none; b=RF5gzvIVXEQowjQxsJrermo2KEGwTfRt+8ltXgrTWcK6Cnnt0PURtLGnWSjI1if+EW7CqRLfhrFk4pRMCASPujILJvBmE9xUTIz0SbwLhyy5wwwn0nIo4SnL92bmE+iFlmOxxwzO/HW8xJ4sJuJOAYIp2bxNyUzthgUjYVeJexs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713421900; c=relaxed/simple; bh=QK75sxWwO2BdHIbjXDFJ/BBEkaabbYciPzZkH2gMSO8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=uUgErzZuhwxXQmO4bJUrmhzdPNCGi5DJ4PtZXHUOGqJ13ljEZ1+wJz8iOsW3VL9iri19w1vdU/U7VQvB2DW0nHbPTPVYa5CZeD0IHIIv5eB63hPv4wpMoA/nAa+kfvbal5hI+nkhoZAhcFygeabtctSZmWsIVHVpRVgnULNLQBw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a3vXDRAb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="a3vXDRAb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2867C113CC; Thu, 18 Apr 2024 06:31:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713421899; bh=QK75sxWwO2BdHIbjXDFJ/BBEkaabbYciPzZkH2gMSO8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=a3vXDRAbOzBSaBvWgOOMfd/pjQ+MqUjO6tpkplhL3OknsEqxjbURT8p0Az/SNglGZ vsw72ELdF+CGJSmasxKoC4th0BMawFWtdHsFvpYMz7kFGldtI+oybvElpg43W9SSCF Rrpt7oUpPvg8OaJS9LDz6Rre7AyOMb3I6y6ZZxuNLdxQReg3Y6Ci5ygO1seu8EQ08r iGfd/f5XqnZ+KHi0Yt8BoRbn/TxcYA1NOqYKc5n5W6bkJXUge1n2OW0So3+o1SyzKH WTXsf+TFYiDyiuPsY5ZG/YnZxo/Lk/rURBZEJDL3dh84SmVszrRM+PF1cy21a05Hpx OL7L2Aj6njWjg== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1rxLJ6-000000000MM-3I9T; Thu, 18 Apr 2024 08:31:41 +0200 Date: Thu, 18 Apr 2024 08:31:40 +0200 From: Johan Hovold To: Konstantin Komarov Cc: ntfs3@lists.linux.dev, LKML , Linux-fsdevel , "Matthew Wilcox (Oracle)" , Anton Altaparmakov Subject: Re: [PATCH 11/11] fs/ntfs3: Taking DOS names into account during link counting Message-ID: References: <6c99c1bd-448d-4301-8404-50df34e8df8e@paragon-software.com> <0cb0b314-e4f6-40a2-9628-0fe7d905a676@paragon-software.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <0cb0b314-e4f6-40a2-9628-0fe7d905a676@paragon-software.com> On Wed, Apr 17, 2024 at 04:10:59PM +0300, Konstantin Komarov wrote: > When counting and checking hard links in an ntfs file record, > >   struct MFT_REC { >     struct NTFS_RECORD_HEADER rhdr; // 'FILE' >     __le16 seq;        // 0x10: Sequence number for this record. > >>  __le16 hard_links;    // 0x12: The number of hard links to record. >     __le16 attr_off;    // 0x14: Offset to attributes. >   ... > > the ntfs3 driver ignored short names (DOS names), causing the link count > to be reduced by 1 and messages to be output to dmesg. I also reported seeing link counts being reduced by 2: [ 78.307412] ntfs3: nvme0n1p3: ino=34e6, Correct links count -> 1 (3). [ 78.307843] ntfs3: nvme0n1p3: ino=5bb23, Correct links count -> 1 (2). [ 78.308509] ntfs3: nvme0n1p3: ino=5c722, Correct links count -> 1 (2). [ 78.310018] ntfs3: nvme0n1p3: ino=5d761, Correct links count -> 1 (2). [ 78.310717] ntfs3: nvme0n1p3: ino=33d18, Correct links count -> 1 (3). [ 78.311179] ntfs3: nvme0n1p3: ino=5d75b, Correct links count -> 1 (3). [ 78.311605] ntfs3: nvme0n1p3: ino=5c708, Correct links count -> 1 (3). - https://lore.kernel.org/all/Zhz_axTjkJ6Aqeys@hovoldconsulting.com/ Are you sure there are not further issues with this code? > For Windows, such a situation is a minor error, meaning chkdsk does not > report > errors on such a volume, and in the case of using the /f switch, it silently > corrects them, reporting that no errors were found. This does not affect > the consistency of the file system. > > Nevertheless, the behavior in the ntfs3 driver is incorrect and > changes the content of the file system. This patch should fix that. This patch is white space damaged and does not apply. > PS: most likely, there has been a confusion of concepts > MFT_REC::hard_links and inode::__i_nlink. I'd also expect a Fixes and CC stable tag here. And as this patch does not seem to depend on the rest of the series it should go first (along with any other bug fixes). > Signed-off-by: Konstantin Komarov Johan