From: Al Viro <viro@zeniv.linux.org.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: Lukasz Stelmach <l.stelmach@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Song Liu <song@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Shaohua Li <shaohua.li@intel.com>
Subject: Re: [PATCH 16/23] initramfs: simplify clean_rootfs
Date: Mon, 27 Jul 2020 03:41:49 +0100 [thread overview]
Message-ID: <20200727024149.GB795125@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20200723142734.GA11080@lst.de>
On Thu, Jul 23, 2020 at 04:27:34PM +0200, Christoph Hellwig wrote:
> On Thu, Jul 23, 2020 at 04:25:34PM +0200, Lukasz Stelmach wrote:
> > >> Can you comment out the call to d_genocide? It seems like for your
> > >> the fact that clean_rootfs didn't actually clean up was a feature and
> > >> not a bug.
> > >>
> > >> I guess the old, pre-2008 code also wouldn't have worked for you in
> > >> that case.
> > >
> > > Did you get a chance to try this?
> >
> > Indeed, commenting out d_genocide() helps.
>
> So given that people have relied on at least the basic device nodes
> like /dev/console to not go away since 2008, I wonder if we should just
> remove clean_rootfs entirely
>
> Linus, Al?
First of all, d_genocide() is simply wrong here from VFS point of view. _IF_
you want recursive removal, you need simple_recursive_remove(path.dentry, NULL).
And it's a userland-visible change of behaviour.
As for removal of clean_rootfs()... FWIW, the odds of an image that would
eventually fail accidentally getting past the signature mismatch check are
fairly low. I've no idea what scenario the author of that thing used to have;
that would be Shaohua Li <shaohua.li@intel.com>. Cc'd...
next prev parent reply other threads:[~2020-07-27 2:41 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-14 19:04 decruft the early init / initrd / initramfs code v2 Christoph Hellwig
2020-07-14 19:04 ` [PATCH 01/23] fs: add a vfs_fchown helper Christoph Hellwig
2020-07-14 19:04 ` [PATCH 02/23] fs: add a vfs_fchmod helper Christoph Hellwig
2020-07-14 19:04 ` [PATCH 03/23] init: remove the bstat helper Christoph Hellwig
2020-07-15 23:14 ` NeilBrown
2020-07-14 19:04 ` [PATCH 04/23] md: move the early init autodetect code to drivers/md/ Christoph Hellwig
2020-07-14 19:04 ` [PATCH 05/23] md: replace the RAID_AUTORUN ioctl with a direct function call Christoph Hellwig
2020-07-15 23:33 ` NeilBrown
2020-07-14 19:04 ` [PATCH 06/23] md: remove the autoscan partition re-read Christoph Hellwig
2020-07-15 23:34 ` NeilBrown
2020-07-14 19:04 ` [PATCH 07/23] md: remove the kernel version of md_u.h Christoph Hellwig
2020-07-14 19:04 ` [PATCH 08/23] md: simplify md_setup_drive Christoph Hellwig
2020-07-15 23:37 ` NeilBrown
2020-07-14 19:04 ` [PATCH 09/23] md: rewrite md_setup_drive to avoid ioctls Christoph Hellwig
2020-07-15 23:50 ` NeilBrown
2020-07-16 13:38 ` Christoph Hellwig
2020-07-14 19:04 ` [PATCH 10/23] initrd: remove support for multiple floppies Christoph Hellwig
2020-07-14 19:04 ` [PATCH 11/23] initrd: remove the BLKFLSBUF call in handle_initrd Christoph Hellwig
2020-07-14 19:04 ` [PATCH 12/23] initrd: switch initrd loading to struct file based APIs Christoph Hellwig
2020-07-27 1:50 ` Al Viro
2020-07-14 19:04 ` [PATCH 13/23] initrd: mark init_linuxrc as __init Christoph Hellwig
2020-07-14 19:04 ` [PATCH 14/23] initrd: mark initrd support as deprecated Christoph Hellwig
2020-07-14 19:04 ` [PATCH 15/23] initramfs: remove the populate_initrd_image and clean_rootfs stubs Christoph Hellwig
2020-07-14 19:04 ` [PATCH 16/23] initramfs: simplify clean_rootfs Christoph Hellwig
[not found] ` <CGME20200717205549eucas1p13fca9a8496836faa71df515524743648@eucas1p1.samsung.com>
2020-07-17 20:55 ` Marek Szyprowski
2020-07-18 10:00 ` Christoph Hellwig
2020-07-23 9:22 ` Christoph Hellwig
2020-07-23 14:25 ` Lukasz Stelmach
2020-07-23 14:27 ` Christoph Hellwig
2020-07-27 2:41 ` Al Viro [this message]
2020-07-27 2:44 ` Matthew Wilcox
2020-07-14 19:04 ` [PATCH 17/23] initramfs: switch initramfs unpacking to struct file based APIs Christoph Hellwig
2020-07-14 19:31 ` Linus Torvalds
2020-07-15 6:27 ` Christoph Hellwig
2020-07-27 2:55 ` Al Viro
2020-07-14 19:04 ` [PATCH 18/23] init: open code setting up stdin/stdout/stderr Christoph Hellwig
2020-07-27 3:05 ` Al Viro
2020-07-27 5:46 ` Christoph Hellwig
2020-07-27 6:03 ` Al Viro
2020-07-27 6:48 ` Christoph Hellwig
2020-07-27 15:54 ` Al Viro
2020-07-27 15:58 ` Christoph Hellwig
2020-07-27 6:20 ` hpa
2020-07-27 6:24 ` Christoph Hellwig
2020-07-27 6:36 ` hpa
2020-07-27 6:49 ` Christoph Hellwig
2020-07-14 19:04 ` [PATCH 19/23] fs: remove ksys_getdents64 Christoph Hellwig
2020-07-14 19:04 ` [PATCH 20/23] fs: remove ksys_open Christoph Hellwig
2020-07-14 19:04 ` [PATCH 21/23] fs: remove ksys_dup Christoph Hellwig
2020-07-14 19:04 ` [PATCH 22/23] fs: remove ksys_fchmod Christoph Hellwig
2020-07-14 19:04 ` [PATCH 23/23] fs: remove ksys_ioctl Christoph Hellwig
2020-07-14 19:34 ` decruft the early init / initrd / initramfs code v2 Linus Torvalds
2020-07-15 6:51 ` Christoph Hellwig
2020-07-16 15:57 ` Guoqing Jiang
2020-07-16 16:00 ` Christoph Hellwig
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