Re: [PATCH v2 2/2] ceph: quota: fix quota subdir mounts

[Yan, Zheng]

On Mon, Mar 18, 2019 at 5:06 PM Gregory Farnum <gfarnum@xxxxxxxxxx> wrote:
>
> On Mon, Mar 18, 2019 at 2:32 PM Yan, Zheng <ukernel@xxxxxxxxx> wrote:
> > After reading the code carefully. I feel a little uncomfortable with
> > the "lookup_ino" in get_quota_realm.  how about populating directories
> > above the 'mount subdir' during mounting (similar to cifs_get_root ).
>
> Isn't that going to be a problem for any clients which have restricted
> filesystem access permissions? They may not be able to see all the
> directories above their mount point.
> -Greg

using lookup_ino to get inode above the "mount subdir" has the same problem