Re: [PATCH -mm 5/7] add user namespace

[Kirill Korotaev <dev@sw.ru>]

> > -       if (current->fsuid == inode->i_uid)
> > +       if ((current->fsuid == inode->i_uid) &&
> > +               (current->nsproxy->user_ns == inode->i_sb->user_ns))
> >                mode >>= 6; 
>
>
> I really don't think assigning a user namespace to a superblock is the
> right way to go.  Seems to me like the _view_ into the filesystem is
> what you want to modify.  That would seem to me to mean that each
> 'struct namespace' (filesystem namespace) or vfsmount would be assigned
> a corresponding user namespace, *not* the superblock.
I dislike this way either. We need an ability to have an access to container
filesystems and data from the host.
such a strong checks break this.

Thanks.
Kirill
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