Re: [PATCH] 2.5.72: follow_mount / follow_link

H. Peter Anvin (hpa@zytor.com)
24 Jun 2003 08:42:56 -0700

Followup to: <20030624145418.GP6754@parcelfarce.linux.theplanet.co.uk>
By author: viro@parcelfarce.linux.theplanet.co.uk
In newsgroup: linux.dev.kernel
>
> On Tue, Jun 24, 2003 at 10:41:59AM -0400, Mike Waychison wrote:
>
> > The changes made in fs/namei.c@1.42 break this behaviour iff the dentry
> > being follow_link'ed is a root dentry. This is becauseo
>
> ... mixing symlinks and mounting is ripe with very ugly races and corner
> cases. Not allowed - symlink can't be a mountpoint or a mounted object.
>

Unfortunately, this is probably the only realistic way to ever get
working direct mounts, so please don't dismiss it out of hand.
follow_link on a directory has turned out to be a really useful way of
doing automounting.

-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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