Re: [PATCH 00/11 RFC] Allow concurrent changes in a directory

Al Viro
2024-12-23T05:22:45Z

On Fri, Dec 20, 2024 at 01:54:18PM +1100, NeilBrown wrote:

> Not all calling code has been converted. Some callers outside of
> fs/namei.c still take an exclusive lock with i_rw_sem. Some might never
> be changed.
>
> As yet this has only been lightly tested as I haven't add foo_shared
> operations to any filesystem yet.

It's still fundamentally broken. You assume that shared lock on
parent is enough to prevent the parent/name changes of children.
That assumption is simply not true.