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 A62782EC088 for ; Thu, 30 Oct 2025 12:59:58 +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=1761829198; cv=none; b=MBnvStc/Z6iwfNVxg5i26x/vABhmUHRGngWKqIJbYARcl0kBJ3gupH5Cj9Xz+NbwSQqwKwfwpsJVjiVmCpyJHVhyTA1bZad1wqSaGBPZ51BmjcpCmpTTvoUj7eOaIEHsrw9FPTDoFpwHqFgJCBZ6yQzk+cxumy4uYKe958R4B1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761829198; c=relaxed/simple; bh=fLjHSAI6N+KUZJ8zKga0O6OVSV4f7vyXqvMflTFLV+Q=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=QhlPd1XCCDM+wRCIX0yeQORw0LMl5+qBjiWicoSVmU3f50ORhJiQsX4Cdmk8ya70lMMFMip3fpohQu7a2988B73mZHKQrwuYtw4G421moqXf6g71o4qOSsy90RXAE6Kq9sYKolQySi6GUNt7ssnu3NLS0NPsur1gQmDxBXe3hfk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CPnKOBdJ; 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="CPnKOBdJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E5FCC4CEF8; Thu, 30 Oct 2025 12:59:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761829198; bh=fLjHSAI6N+KUZJ8zKga0O6OVSV4f7vyXqvMflTFLV+Q=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=CPnKOBdJ2IsrgTPcA0dUXJIscyNtlkNuR4MkVj2iZQcmN354+OAhnBU9tVPDWaEwM BuUGwLVcpc7ZnXDLhITsjL86lzISM65cVDOklqmqbxHK3zoD6M6RdFxjji8V0DMN9/ ONEWzhHOtjDVeDwXT3H+QqFRbzBQ8C/GaPMAB1xkVF4fqYkIr2m28XlqEuY4cuggli 8rwil4/vAMW+4XULTE6LDW+XB2nCbSBWsQOlI9uPl1arcqtF9V+TSDnBCfAEqTJ3+X y/Fg3aiPW4cjzxUjoCvF4Em3jmLyywUUyhqUc1TtZW9Q7ju6GsZbtVa8LyvcS+RXSa PKGS7xifFy7Vg== Message-ID: <1697efab0661c4c80831544f84c9e520f33962e7.camel@kernel.org> Subject: Re: [PATCH] Add error handling to minix filesystem similar to ext4 From: Jeff Layton To: Jori Koolstra , Jan Kara Cc: Christian Brauner , "skhan@linuxfoundation.org" , Khalid Aziz , Tetsuo Handa , Taotao Chen , NeilBrown , linux-kernel@vger.kernel.org, syzbot+4e49728ec1cbaf3b91d2@syzkaller.appspotmail.com Date: Thu, 30 Oct 2025 08:59:56 -0400 In-Reply-To: <792975039.3142581.1761826973320@kpc.webmail.kpnmail.nl> References: <20251028205857.386719-1-jkoolstra@xs4all.nl> <792975039.3142581.1761826973320@kpc.webmail.kpnmail.nl> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv 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linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2025-10-30 at 13:22 +0100, Jori Koolstra wrote: > Hi Jan, >=20 > >=20 > > The patch looks ok to me but since minix filesystem driver is in the ke= rnel > > mostly to allow mounting ancient unix filesystems I don't quite underst= and > > the motivation for adding the new mount options. Why not just fixup > > minix_rmdir() to better handle corrupted filesystems? > >=20 > > Honza >=20 > I am doing the Linux kernel mentorship program, and was looking to contri= bute > to fs. Since I saw a lot bugs on syzbot related to minix (and jfs too) no= t > handling corruptions well (yielding warnings in drop_nlink e.g.) I figure= d > it was a low stakes project, not completely trivial, yet within my scope,= to > attempt to implement what ext4 does for these kind of problems (and jfs > implements the same opts too). >=20 > I would have asked about the exact status of minix, but was told not to > bother maintainers without a patch. I would be open with trying to improv= e > minix further, but of course if there are better options to get it out of > the kernel altogether that may be better. Sad for me, since that means st= ill > zero patches, but that is not your problem :) >=20 Not necessarily. I'm not sure if your internship covers this, but you could start a project to build a minixfs FUSE fs (if one doesn't already exist). If you get it working and stable, you can then submit patches to deprecate and remove it from the kernel. > Anyway, I hope this clarifies why I submitted this patch. For some background: this is a continuation of a discussion that we had at LSF/MM summit this year. A lot of these smaller, less-used filesystems represent a significant maintenance burden. Whenever we have to make changes at the VFS layer, they represent another fs that we have to touch. Many of these are not performance-critical and are hard to test. They would be _much_ easier to maintain in userland if we can make that work. --=20 Jeff Layton