netdev - Re: [PATCH bpf-next v3 06/11] bpf: Introduce BPF_MAP_TYPE_STRUCT

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Message-ID: <5f9f4525-ff53-7f66-69fd-9d234e11789d@iogearbox.net>
Date:   Tue, 7 Jan 2020 21:50:50 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Martin KaFai Lau <kafai@...com>, bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        David Miller <davem@...emloft.net>, kernel-team@...com,
        netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next v3 06/11] bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS

On 12/31/19 7:20 AM, Martin KaFai Lau wrote:
[...]
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index 7ab67eeae6e7..19660f168a64 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -8154,6 +8154,11 @@ static int check_map_prog_compatibility(struct bpf_verifier_env *env,
>   		return -EINVAL;
>   	}
>   
> +	if (map->map_type == BPF_MAP_TYPE_STRUCT_OPS) {
> +		verbose(env, "bpf_struct_ops map cannot be used in prog\n");
> +		return -EINVAL;
> +	}
> +

Do we also need to reject map in map creation via bpf_map_meta_alloc() ?

>   	return 0;
>   }
>   
>