linux-kernel - Re: [PATCH v9 05/23] ima: Define ima_namespace struct and start moving variables into it

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Date:   Wed, 26 Jan 2022 09:47:15 +0100
From:   Christian Brauner <brauner@...nel.org>
To:     Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:     linux-integrity@...r.kernel.org, zohar@...ux.ibm.com,
        serge@...lyn.com, christian.brauner@...ntu.com,
        containers@...ts.linux.dev, dmitry.kasatkin@...il.com,
        ebiederm@...ssion.com, krzysztof.struczynski@...wei.com,
        roberto.sassu@...wei.com, mpeters@...hat.com, lhinds@...hat.com,
        lsturman@...hat.com, puiterwi@...hat.com, jejb@...ux.ibm.com,
        jamjoom@...ibm.com, linux-kernel@...r.kernel.org,
        paul@...l-moore.com, rgb@...hat.com,
        linux-security-module@...r.kernel.org, jmorris@...ei.org,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH v9 05/23] ima: Define ima_namespace struct and start
 moving variables into it

On Tue, Jan 25, 2022 at 05:46:27PM -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@...ux.ibm.com>
> 
> Define the ima_namespace structure and the ima_namespace variable
> init_ima_ns for the host's IMA namespace. Implement basic functions for
> namespacing support.
> 
> Move variables related to the IMA policy into the ima_namespace. This way
> the IMA policy of an IMA namespace can be set and displayed using a
> front-end like securityfs.
> 
> Implement ima_ns_from_file() to get the IMA namespace via the user
> namespace of the securityfs superblock that a file belongs to.
> 
> To get the current ima_namespace use &init_ima_ns when a function
> that is related to a policy rule is called.
> 
> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
> 
> ---

For the approach of introducing struct ima_namespace and moving a bunch
of variables in there at the same time to prepare subsequent further
namespacing:

Acked-by: Christian Brauner <brauner@...nel.org>

I can't speak to the actual ima changes.