Re: [patch 00/13] vfs: add helpers to check r/o bind mounts

[Miklos Szeredi]

> > > > let alone removing the interface that doesn't require checks to be
> > > > vfsmount-based for all users.
> > > 
> > > What users?  There are paractically _no_ other users.  The ones that
> > > there are (like reiserfs) should not be using them, and there are
> > > already some patches cleaning that mess up.
> > 
> > OK, explain me, in small words, WTF should something that wants to do
> > operations on filesystem tree have a vfsmount.  Slowly.  And "r/o
> > bind loses value if it can be bypassed" is a hogwash - fs methods are
> > still there, so it *can* be bypassed just fine, thank you very much.
> 
> And we know what to do with such users.

Which begs the question: why is ecryptfs doing that with the xattr
methods?  Does it need to bypass the permission checks?  Seems very
fishy to me.

Mike?

Miklos
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