From: "J. Bruce Fields" <bfields@fieldses.org>
To: Christoph Hellwig <hch@infradead.org>, Neil Brown <neilb@suse.de>,
Andreas Gruenbacher <agruen@suse.de>,
Trond Myklebust <trond.myklebust@fys.uio.no>,
Tony Jones <tonyj@suse.de>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
chrisw@sous-sol.org, linux-security-module@vger.kernel.org,
viro@zeniv.linux.org.uk
Subject: Re: [RFC 0/28] Patches to pass vfsmount to LSM inode security hooks
Date: Mon, 12 Feb 2007 13:32:34 -0500 [thread overview]
Message-ID: <20070212183234.GA7589@fieldses.org> (raw)
In-Reply-To: <20070206103737.GA14454@infradead.org>
On Tue, Feb 06, 2007 at 10:37:37AM +0000, Christoph Hellwig wrote:
> On Tue, Feb 06, 2007 at 09:26:14PM +1100, Neil Brown wrote:
> > What would be the benefit of having private non-visible vfsmounts?
> > Sounds like a recipe for confusion?
> >
> > It is possible that mountd might start doing bind-mounts to create the
> > 'pseudo filesystem' thing for NFSv4, but they would be very visible
> > (under /var/lib/nfs/v4root or something).
> > So having it's own vfsmount might make sense, but I don't get
> > 'non-visible'.
> It would allow creating an exported tree without interferance with
> the local visible tree. Note that the local visible tree isn't
> global anymore either, and this allows to adjust what's exported
> through nfsd throug a specific interface instead of needing to
> get into nfsd namespace through some way.
What would this interface look like? Would it be a user<->kernel
interface, or a user<->mountd interface?
Tentatively what I was thinking of was having mountd fork off its own
namespace, use /etc/exports to construct a mount tree there, then pass
that mount tree down to the kernel using the existing exports cache
channel. Name resolution in svc_export_parse should be done in mountd's
namespace, so I think this works.
> Think of listing the actually exported devices in /etc/exports instead
> of the indirection through fstab aswell.
Hm. We'd have to add mount options to /etc/exports too if we were going
to do that, right?
--b.
next prev parent reply other threads:[~2007-02-12 18:32 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-05 18:22 [RFC 0/28] Patches to pass vfsmount to LSM inode security hooks Tony Jones
2007-02-05 18:22 ` [RFC 1/28] Pass struct vfsmount to the inode_create LSM hook Tony Jones
2007-02-05 18:22 ` [RFC 2/28] Remove redundant check from proc_setattr() Tony Jones
2007-02-05 19:16 ` Chris Wright
2007-02-05 18:22 ` [RFC 3/28] Pass struct file down to remove_suid and children Tony Jones
2007-02-05 18:22 ` [RFC 4/28] Add a vfsmount parameter to notify_change() Tony Jones
2007-02-05 18:23 ` [RFC 5/28] Pass struct vfsmount to the inode_setattr LSM hook Tony Jones
2007-02-05 18:23 ` [RFC 6/28] Add struct vfsmount parameter to vfs_mkdir() Tony Jones
2007-02-05 18:23 ` [RFC 7/28] Pass struct vfsmount to the inode_mkdir LSM hook Tony Jones
2007-02-05 18:23 ` [RFC 8/28] Add a struct vfsmount parameter to vfs_mknod() Tony Jones
2007-02-05 18:23 ` [RFC 9/28] Pass struct vfsmount to the inode_mknod LSM hook Tony Jones
2007-02-05 18:23 ` [RFC 10/28] Add a struct vfsmount parameter to vfs_symlink() Tony Jones
2007-02-05 18:23 ` [RFC 11/28] Pass struct vfsmount to the inode_symlink LSM hook Tony Jones
2007-02-05 18:24 ` [RFC 12/28] Pass struct vfsmount to the inode_readlink " Tony Jones
2007-02-05 18:24 ` [RFC 13/28] Add struct vfsmount parameters to vfs_link() Tony Jones
2007-02-05 18:24 ` [RFC 14/28] Pass struct vfsmount to the inode_link LSM hook Tony Jones
2007-02-05 18:24 ` [RFC 15/28] Add a struct vfsmount parameter to vfs_rmdir() Tony Jones
2007-02-05 18:24 ` [RFC 16/28] Pass struct vfsmount to the inode_rmdir LSM hook Tony Jones
2007-02-05 18:24 ` [RFC 17/28] Add a struct vfsmount parameter to vfs_unlink() Tony Jones
2007-02-05 18:25 ` [RFC 18/28] Pass struct vfsmount to the inode_unlink LSM hook Tony Jones
2007-02-05 18:25 ` [RFC 19/28] Add struct vfsmount parameters to vfs_rename() Tony Jones
2007-02-05 18:25 ` [RFC 20/28] Pass struct vfsmount to the inode_rename LSM hook Tony Jones
2007-02-05 18:25 ` [RFC 21/28] Add a struct vfsmount parameter to vfs_setxattr() Tony Jones
2007-02-05 18:25 ` [RFC 22/28] Pass struct vfsmount to the inode_setxattr LSM hook Tony Jones
2007-02-05 18:25 ` [RFC 23/28] Add a struct vfsmount parameter to vfs_getxattr() Tony Jones
2007-02-05 18:25 ` [RFC 24/28] Pass struct vfsmount to the inode_getxattr LSM hook Tony Jones
2007-02-05 18:26 ` [RFC 25/28] Add a struct vfsmount parameter to vfs_listxattr() Tony Jones
2007-02-05 18:26 ` [RFC 26/28] Pass struct vfsmount to the inode_listxattr LSM hook Tony Jones
2007-02-05 18:26 ` [RFC 27/28] Add a struct vfsmount parameter to vfs_removexattr() Tony Jones
2007-02-05 18:26 ` [RFC 28/28] Pass struct vfsmount to the inode_removexattr LSM hook Tony Jones
2007-02-05 18:44 ` [RFC 0/28] Patches to pass vfsmount to LSM inode security hooks Christoph Hellwig
2007-02-05 18:58 ` Trond Myklebust
2007-02-05 19:02 ` Christoph Hellwig
2007-02-06 3:20 ` Andreas Gruenbacher
2007-02-06 8:51 ` Trond Myklebust
2007-02-06 9:48 ` Christoph Hellwig
2007-02-06 10:31 ` Neil Brown
2007-02-07 9:25 ` Andreas Gruenbacher
2007-02-06 9:47 ` Christoph Hellwig
2007-02-06 10:26 ` Neil Brown
2007-02-06 10:37 ` Christoph Hellwig
2007-02-12 18:32 ` J. Bruce Fields [this message]
2007-02-07 9:58 ` Andreas Gruenbacher
2007-02-07 12:11 ` Christoph Hellwig
2007-02-05 19:15 ` Chris Wright
2007-02-06 0:44 ` Andreas Gruenbacher
2007-02-06 2:13 ` Andreas Gruenbacher
2007-02-06 9:52 ` Christoph Hellwig
2007-02-07 9:04 ` Andreas Gruenbacher
2007-02-06 12:55 ` Stephen Smalley
2007-02-07 8:55 ` Andreas Gruenbacher
2007-02-07 15:43 ` Chris Wright
2007-02-07 16:06 ` Stephen Smalley
2007-02-07 16:25 ` Jeff Mahoney
2007-02-07 19:55 ` Andreas Gruenbacher
2007-02-05 19:26 ` Casey Schaufler
2007-02-05 19:39 ` Arjan van de Ven
2007-02-05 19:50 ` Chris Wright
2007-02-05 20:23 ` Casey Schaufler
2007-02-06 2:30 ` Andreas Gruenbacher
2007-02-06 14:20 ` Tetsuo Handa
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