Re: [RFC PATCH 2/6] bpf: add BPF_MAP_DUMP command to access more than one entry per call

[Jakub Kicinski]

On Fri, 21 Jun 2019 16:16:46 -0700, Brian Vazquez wrote:
> @@ -385,6 +386,14 @@ union bpf_attr {
>  		__u64		flags;
>  	};
>  
> +	struct { /* struct used by BPF_MAP_DUMP command */
> +		__u32		map_fd;

There is a hole here, perhaps flags don't have to be 64 bit?

> +		__aligned_u64	prev_key;
> +		__aligned_u64	buf;
> +		__aligned_u64	buf_len; /* input/output: len of buf */
> +		__u64		flags;
> +	} dump;
> +
>  	struct { /* anonymous struct used by BPF_PROG_LOAD command */
>  		__u32		prog_type;	/* one of enum bpf_prog_type */
>  		__u32		insn_cnt;