linux-kernel - Re: [PATCH v16 01/12] bpf: Allow kfuncs to be used in LSM programs

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Message-ID: <CAP01T76CNmuh6qzewzafoZrSX1WCs6YsCBiEDkSr-1Oi+th0aw@mail.gmail.com>
Date:   Tue, 6 Sep 2022 04:28:19 +0200
From:   Kumar Kartikeya Dwivedi <memxor@...il.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        martin.lau@...ux.dev, song@...nel.org, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, mykolal@...com,
        dhowells@...hat.com, jarkko@...nel.org, rostedt@...dmis.org,
        mingo@...hat.com, paul@...l-moore.com, jmorris@...ei.org,
        serge@...lyn.com, shuah@...nel.org, bpf@...r.kernel.org,
        keyrings@...r.kernel.org, linux-security-module@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        deso@...teo.net, Roberto Sassu <roberto.sassu@...wei.com>
Subject: Re: [PATCH v16 01/12] bpf: Allow kfuncs to be used in LSM programs

On Mon, 5 Sept 2022 at 16:34, Roberto Sassu
<roberto.sassu@...weicloud.com> wrote:
>
> From: KP Singh <kpsingh@...nel.org>
>
> In preparation for the addition of new kfuncs, allow kfuncs defined in the
> tracing subsystem to be used in LSM programs by mapping the LSM program
> type to the TRACING hook.
>
> Signed-off-by: KP Singh <kpsingh@...nel.org>
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> ---

Acked-by: Kumar Kartikeya Dwivedi <memxor@...il.com>

>  kernel/bpf/btf.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index 903719b89238..e49b3b6d48ad 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -7243,6 +7243,7 @@ static int bpf_prog_type_to_kfunc_hook(enum bpf_prog_type prog_type)
>         case BPF_PROG_TYPE_STRUCT_OPS:
>                 return BTF_KFUNC_HOOK_STRUCT_OPS;
>         case BPF_PROG_TYPE_TRACING:
> +       case BPF_PROG_TYPE_LSM:
>                 return BTF_KFUNC_HOOK_TRACING;
>         case BPF_PROG_TYPE_SYSCALL:
>                 return BTF_KFUNC_HOOK_SYSCALL;
> --
> 2.25.1
>