From: Colin Walters <walters@verbum.org>
To: Andy Lutomirski <luto@amacapital.net>
Cc: tytso@mit.edu, David Herrmann <dh.herrmann@gmail.com>,
linux-kernel@vger.kernel.org, Hugh Dickins <hughd@google.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <matthew@wil.cx>,
Karol Lewandowski <k.lewandowsk@samsung.com>,
Kay Sievers <kay@vrfy.org>, Daniel Mack <zonque@gmail.com>,
Lennart Poettering <lennart@poettering.net>,
Kristian@thunk.org, john.stultz@linaro.org,
Greg Kroah-Hartman <greg@kroah.com>, Tejun Heo <tj@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
dri-devel@lists.freedesktop.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ryan Lortie <desrt@desrt.ca>,
mtk.manpages@gmail.com
Subject: Re: [PATCH 0/6] File Sealing & memfd_create()
Date: Thu, 10 Apr 2014 19:45:38 +0000 [thread overview]
Message-ID: <1397159378.4434.1@mail.messagingengine.com> (raw)
In-Reply-To: <5346EDE8.2060004@amacapital.net>
On Thu, Apr 10, 2014 at 3:15 PM, Andy Lutomirski <luto@amacapital.net>
wrote:
>
>
> COW links can do this already, I think. Of course, you'll have to
> use a
> filesystem that supports them.
COW is nice if the filesystem supports them, but my userspace code
needs to be filesystem agnostic. Because of that, the design for
userspace simply doesn't allow arbitrary writes.
Instead, I have to painfully audit every rpm %post/dpkg postinst type
script to ensure they break hardlinks, and furthermore only allow
executing scripts that are known to do so.
But I think even in a btrfs world it'd still be useful to mark files as
content-immutable.
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next prev parent reply other threads:[~2014-04-10 19:49 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-19 19:06 [PATCH 0/6] File Sealing & memfd_create() David Herrmann
2014-03-19 19:06 ` [PATCH 1/6] fs: fix i_writecount on shmem and friends David Herrmann
2014-03-19 19:06 ` [PATCH 2/6] shm: add sealing API David Herrmann
2014-03-19 19:06 ` [PATCH 3/6] shm: add memfd_create() syscall David Herrmann
2014-03-20 8:47 ` Cyrill Gorcunov
2014-03-20 9:01 ` Pavel Emelyanov
2014-03-20 11:29 ` David Herrmann
2014-03-20 11:50 ` Pavel Emelyanov
2014-03-20 19:22 ` John Stultz
2014-04-02 13:38 ` Konstantin Khlebnikov
2014-04-02 14:18 ` David Herrmann
2014-04-02 14:52 ` Konstantin Khlebnikov
2014-04-10 19:07 ` Andy Lutomirski
2014-03-19 19:06 ` [PATCH 4/6] selftests: add memfd_create() + sealing tests David Herrmann
2014-03-19 19:06 ` [PATCH man-pages 5/6] fcntl.2: document SHMEM_SET/GET_SEALS commands David Herrmann
2014-03-19 19:06 ` [PATCH man-pages 6/6] memfd_create.2: add memfd_create() man-page David Herrmann
2014-03-20 2:55 ` [PATCH 0/6] File Sealing & memfd_create() Greg Kroah-Hartman
2014-03-20 3:49 ` Linus Torvalds
2014-03-20 8:07 ` David Herrmann
2014-03-20 14:41 ` One Thousand Gnomes
2014-03-20 15:12 ` David Herrmann
2014-03-20 15:26 ` One Thousand Gnomes
2014-03-20 15:32 ` tytso
2014-03-20 15:39 ` One Thousand Gnomes
2014-03-20 15:48 ` David Herrmann
2014-03-20 16:38 ` tytso
2014-04-10 19:14 ` Andy Lutomirski
2014-04-10 20:32 ` Theodore Ts'o
2014-04-10 20:37 ` Andy Lutomirski
2014-04-10 20:49 ` David Herrmann
2014-04-10 21:16 ` Andy Lutomirski
2014-04-10 22:57 ` David Herrmann
2014-04-10 23:05 ` Andy Lutomirski
2014-04-10 23:16 ` David Herrmann
2014-04-10 23:32 ` Andy Lutomirski
2014-04-20 15:03 ` Pavel Machek
2014-06-17 9:48 ` Florian Weimer
2014-06-17 16:21 ` Andy Lutomirski
2014-04-10 14:45 ` Colin Walters
2014-04-10 19:15 ` Andy Lutomirski
2014-04-10 19:45 ` Colin Walters [this message]
2014-04-11 6:09 ` Alex Elsayed
2014-04-08 13:00 ` Florian Weimer
2014-04-09 21:31 ` David Herrmann
2014-04-22 9:10 ` Florian Weimer
2014-04-22 11:55 ` David Herrmann
2014-04-22 12:44 ` Florian Weimer
2014-04-22 12:55 ` David Herrmann
2014-04-10 19:17 ` Andy Lutomirski
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