Re: [PATCH 10/11] VFS: take a shared lock for create/remove directory operations.

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

On Mon, Dec 23, 2024 at 06:11:16PM +1100, NeilBrown wrote:
> ... Yes, thanks.
> 
> So I need __d_unalias() to effectively do a "try_lock" of
> DCACHE_PAR_UPDATE and hold the lock across __d_move().
> I think that would address the concerned you raised.
> 
> Did you see anything else that might be problematic?

That might work with ->d_parent, but it won't help with ->d_name
in same-parent case of __d_unalias()...