netdev - Re: [PATCH bpf-next v1 03/10] tools: Add bpfilter usermode helper header

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Date:   Tue, 8 Jun 2021 09:20:12 -0700
From:   Yonghong Song <yhs@...com>
To:     Dmitrii Banshchikov <me@...que.spb.ru>, <bpf@...r.kernel.org>
CC:     <ast@...nel.org>, <davem@...emloft.net>, <daniel@...earbox.net>,
        <andrii@...nel.org>, <kafai@...com>, <songliubraving@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>,
        <netdev@...r.kernel.org>, <rdna@...com>
Subject: Re: [PATCH bpf-next v1 03/10] tools: Add bpfilter usermode helper
 header



On 6/3/21 3:14 AM, Dmitrii Banshchikov wrote:
> The header will be used in bpfilter usermode helper test infrastructure.
> 
> Signed-off-by: Dmitrii Banshchikov <me@...que.spb.ru>
> ---
>   tools/include/uapi/linux/bpfilter.h | 179 ++++++++++++++++++++++++++++
>   1 file changed, 179 insertions(+)
>   create mode 100644 tools/include/uapi/linux/bpfilter.h
> 
> diff --git a/tools/include/uapi/linux/bpfilter.h b/tools/include/uapi/linux/bpfilter.h
> new file mode 100644
> index 000000000000..8b49d81f81c8
> --- /dev/null
> +++ b/tools/include/uapi/linux/bpfilter.h
> @@ -0,0 +1,179 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +#ifndef _UAPI_LINUX_BPFILTER_H
> +#define _UAPI_LINUX_BPFILTER_H
> +
> +#include <linux/if.h>
> +#include <linux/const.h>
> +
> +#define BPFILTER_FUNCTION_MAXNAMELEN    30
> +#define BPFILTER_EXTENSION_MAXNAMELEN   29
> +
> +#define BPFILTER_STANDARD_TARGET        ""
> +#define BPFILTER_ERROR_TARGET           "ERROR"
> +
> +
> +#define BPFILTER_ALIGN(__X) __ALIGN_KERNEL(__X, __alignof__(__u64))

The difference between include/uapi/linux/bpfilter.h and
tools/include/uapi/linux/bpfilter.h is the above "define".
Can we put the above define in include/uapi/linux/bpfilter.h as well
so in the commit message we can say tools/include/uapi/linux/bpfilter.h
is a copy of include/uapi/linux/bpfilter.h?

> +
> +enum {
> +	BPFILTER_IPT_SO_SET_REPLACE = 64,
> +	BPFILTER_IPT_SO_SET_ADD_COUNTERS = 65,
> +	BPFILTER_IPT_SET_MAX,
> +};
> +
[...]