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Date:   Wed, 8 Jan 2020 08:22:27 +1100 (AEDT)
From:   James Morris <jmorris@namei.org>
To:     KP Singh <kpsingh@chromium.org>
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Subject: Re: [PATCH bpf-next v1 06/13] bpf: lsm: Init Hooks and create files
 in securityfs
In-Reply-To: <20191220154208.15895-7-kpsingh@chromium.org>
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References: <20191220154208.15895-1-kpsingh@chromium.org> <20191220154208.15895-7-kpsingh@chromium.org>
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On Fri, 20 Dec 2019, KP Singh wrote:

> From: KP Singh <kpsingh@google.com>
> 
> The LSM creates files in securityfs for each hook registered with the
> LSM.
> 
>     /sys/kernel/security/bpf/<h_name>
> 
> The list of LSM hooks are maintained in an internal header "hooks.h"
> Eventually, this list should either be defined collectively in
> include/linux/lsm_hooks.h or auto-generated from it.
> 
> * Creation of a file for the hook in the securityfs.
> * Allocation of a bpf_lsm_hook data structure which stores
>   a pointer to the dentry of the newly created file in securityfs.
> * Creation of a typedef for the hook so that BTF information
>   can be generated for the LSM hooks to:
> 
>   - Make them "Compile Once, Run Everywhere".
>   - Pass the right arguments when the attached programs are run.
>   - Verify the accesses made by the program by using the BTF
>     information.
> 
> Signed-off-by: KP Singh <kpsingh@google.com>


Reviewed-by: James Morris <jamorris@linux.microsoft.com>


-- 
James Morris
<jmorris@namei.org>