netdev - Re: [bpf-next PATCH v5 1/5] bpf, sk_msg: add some generic helpers that may be useful from sk

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Message-ID: <48c47712-bba1-3f53-bbeb-8a7403dab6db@iogearbox.net>
Date:   Mon, 25 May 2020 23:51:42 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     John Fastabend <john.fastabend@...il.com>, yhs@...com,
        andrii.nakryiko@...il.com, ast@...nel.org
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [bpf-next PATCH v5 1/5] bpf, sk_msg: add some generic helpers
 that may be useful from sk_msg

On 5/24/20 6:50 PM, John Fastabend wrote:
> Add these generic helpers that may be useful to use from sk_msg programs.
> The helpers do not depend on ctx so we can simply add them here,
> 
>   BPF_FUNC_perf_event_output
>   BPF_FUNC_get_current_uid_gid
>   BPF_FUNC_get_current_pid_tgid
>   BPF_FUNC_get_current_comm

Hmm, added helpers below are what you list here except get_current_comm.
Was this forgotten to be added here?

>   BPF_FUNC_get_current_cgroup_id
>   BPF_FUNC_get_current_ancestor_cgroup_id
>   BPF_FUNC_get_cgroup_classid
> 
> Acked-by: Yonghong Song <yhs@...com>
> Signed-off-by: John Fastabend <john.fastabend@...il.com>
> ---
>   net/core/filter.c |   16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
> 
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 822d662..a56046a 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -6443,6 +6443,22 @@ sk_msg_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
>   		return &bpf_msg_push_data_proto;
>   	case BPF_FUNC_msg_pop_data:
>   		return &bpf_msg_pop_data_proto;
> +	case BPF_FUNC_perf_event_output:
> +		return &bpf_event_output_data_proto;
> +	case BPF_FUNC_get_current_uid_gid:
> +		return &bpf_get_current_uid_gid_proto;
> +	case BPF_FUNC_get_current_pid_tgid:
> +		return &bpf_get_current_pid_tgid_proto;
> +#ifdef CONFIG_CGROUPS
> +	case BPF_FUNC_get_current_cgroup_id:
> +		return &bpf_get_current_cgroup_id_proto;
> +	case BPF_FUNC_get_current_ancestor_cgroup_id:
> +		return &bpf_get_current_ancestor_cgroup_id_proto;
> +#endif
> +#ifdef CONFIG_CGROUP_NET_CLASSID
> +	case BPF_FUNC_get_cgroup_classid:
> +		return &bpf_get_cgroup_classid_curr_proto;
> +#endif
>   	default:
>   		return bpf_base_func_proto(func_id);
>   	}
>