Re: [PATCH/RFC] NFSD: handle BTRFS subvolumes better.

NeilBrown
2021-07-20T00:33:52Z

On Mon, 19 Jul 2021, Christoph Hellwig wrote:
> On Thu, Jul 15, 2021 at 02:01:11PM -0400, Josef Bacik wrote:
> > This is not a workable solution. It's not a matter of simply tying into
> > existing infrastructure, we'd have to completely rework how the VFS deals
> > with this stuff in order to be reasonable. And when I brought this up to Al
> > he told me I was insane and we absolutely had to have a different SB for
> > every vfsmount, which means we can't use vfsmount for this, which means we
> > don't have any other options. Thanks,
>
> Then fix the problem another way. The problem is known, old and keeps
> breaking stuff. Don't paper over it, fix it.

Do you have any pointers to other breakage caused by this particular
behaviour of btrfs? It would to have all requirements clearly on the
table while designing a solution.

Thanks,
NeilBrown