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From: Dave Chinner <david@fromorbit.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Theodore Y. Ts'o" <tytso@mit.edu>,
	Linux Containers <containers@lists.linux-foundation.org>,
	linux-fsdevel@vger.kernel.org,
	Seth Forshee <seth.forshee@canonical.com>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Christian Brauner <christian@brauner.io>,
	linux-kernel@vger.kernel.org
Subject: Re: [REVIEW][PATCH 0/6] Wrapping up the vfs support for unprivileged mounts
Date: Wed, 30 May 2018 14:34:55 +1000	[thread overview]
Message-ID: <20180530043455.GN23861@dastard> (raw)
In-Reply-To: <87k1rlkh1g.fsf@xmission.com>

On Tue, May 29, 2018 at 09:34:35PM -0500, Eric W. Biederman wrote:
> Dave Chinner <david@fromorbit.com> writes:
> 
> > Yeah, the are some fairly big process and policy things that
> > need to be decided here. Not just at the kernel level, but at
> > distro and app infrastructure level too.
> >
> > I was originally sceptical of supporting kernel filesystems via
> > lkl, but the desire for unprivileged mounts has not gone away
> > and so I'm less worried about accessing filesystems that way
> > than I am of letting the kernel parse untrusted images from
> > untrusted users...
> 
> There is also the more readily available libguestfs which doesn't
> support as many filesystems but does seem available in most linux
> distributions already.  It already has a fuse option available
> with guestmount.  I may have to dig in there and see how to make
> it available without using fusermount.

That only provides host access to filesystems mounted inside guest
VMs, right?  AFAIA, libguestfs is not providing a FUSE
implementation that mounts and parses raw XFS images. e.g it barely
understands anything XFS, and that which it does is via running and
screen-scraping the output of XFS's userspace management tools...

> > I'm not sure what the correct forum for this is - wasn't this
> > something the Plumbers conference was supposed to facilitate?
> 
> Yes.  If we all need to be in a room and talk about things.
> It is early enough in the planning for Plumers that we could
> definitely schedule a talk or a BOF for this.

Ok. I have no idea if I'll be at plumbers - it's an awful long way
from where I am....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

  reply	other threads:[~2018-05-30  4:34 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-23 23:22 Eric W. Biederman
2018-05-23 23:25 ` [REVIEW][PATCH 1/6] vfs: Don't allow changing the link count of an inode with an invalid uid or gid Eric W. Biederman
2018-05-24 12:58   ` Seth Forshee
2018-05-24 22:30     ` Christian Brauner
2018-05-23 23:25 ` [REVIEW][PATCH 2/6] vfs: Allow userns root to call mknod on owned filesystems Eric W. Biederman
2018-05-24 13:55   ` Seth Forshee
2018-05-24 16:55     ` Eric W. Biederman
2018-05-24 17:22       ` Seth Forshee
2018-05-24 19:12   ` Christian Brauner
2018-05-23 23:25 ` [REVIEW][PATCH 3/6] fs: Allow superblock owner to replace invalid owners of inodes Eric W. Biederman
2018-05-23 23:41   ` [REVIEW][PATCH v2 " Eric W. Biederman
2018-05-24 22:30     ` Christian Brauner
2018-05-23 23:25 ` [REVIEW][PATCH 4/6] fs: Allow superblock owner to access do_remount_sb() Eric W. Biederman
2018-05-24 15:58   ` Christian Brauner
2018-05-24 16:45     ` Eric W. Biederman
2018-05-24 17:28       ` Christian Brauner
2018-05-23 23:25 ` [REVIEW][PATCH 5/6] capabilities: Allow privileged user in s_user_ns to set security.* xattrs Eric W. Biederman
2018-05-24 15:57   ` Christian Brauner
2018-05-23 23:25 ` [REVIEW][PATCH 6/6] fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems Eric W. Biederman
2018-05-24 15:59   ` Christian Brauner
2018-05-24 21:46 ` [REVIEW][PATCH 0/6] Wrapping up the vfs support for unprivileged mounts Theodore Y. Ts'o
2018-05-24 23:23   ` Eric W. Biederman
2018-05-25  3:57     ` Dave Chinner
2018-05-25  4:06       ` Darrick J. Wong
2018-05-29 13:12       ` Eric W. Biederman
2018-05-29 22:17         ` Dave Chinner
2018-05-30  2:34           ` Eric W. Biederman
2018-05-30  4:34             ` Dave Chinner [this message]
2018-05-29 15:40 ` Dongsu Park

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