Re: [PATCH v4] landlock: Clarify documentation for the LANDLOCK_ACCESS_FS_REFER right

[Alex Colomar <alx.manpages@gmail.com>]

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Hi Günther,

On 2/21/23 17:52, Günther Noack wrote:
[...]

Sorry for taking so much time in looking into this!

> + *
> + *   * The reparented file may not gain more access rights in the destination
> + *     directory than it previously had in the source directory.  If this is
> + *     attempted, the operation results in an ``EXDEV`` error.
> + *
> + *   * When linking or renaming, the ``LANDLOCK_ACCESS_FS_MAKE_*`` right for the
> + *     respective file type must be granted for the destination directory.
> + *     Otherwise, the operation results in an ``EACCES`` error.
> + *
> + *   * When renaming, the ``LANDLOCK_ACCESS_FS_REMOVE_*`` right for the
> + *     respective file type must be granted for the source directory.  Otherwise,
> + *     the operation results in an ``EACCES`` error.
> + *
> + *   If multiple requirements are not met, the ``EACCES`` error code takes
> + *   precedence over ``EXDEV``.

Is this something worth guaranteeing, or just an implementation detail 
that may easily change?

Cheers,

Alex

>    *
>    * .. warning::
>    *
> 
> base-commit: c9c3395d5e3dcc6daee66c6908354d47bf98cb0c

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