Re: [PATCH iproute2-next v2] f_flower: add cfm support

[Ido Schimmel <idosch@idosch.org>]

On Tue, Jun 20, 2023 at 10:10:36PM +0200, Zahari Doychev wrote:
> From: Zahari Doychev <zdoychev@maxlinear.com>
> 
> Add support for matching on CFM Maintenance Domain level and opcode.

[...]

> 
> Signed-off-by: Zahari Doychev <zdoychev@maxlinear.com>

Reviewed-by: Ido Schimmel <idosch@nvidia.com>

Few comments I missed earlier

> ---
>  include/uapi/linux/pkt_cls.h |  9 ++++

iproute2 maintainers sync UAPI files using a script and I believe the
preference is for submitters to not touch these files or update them in
a separate patch that the maintainers can easily discard.

>  lib/ll_proto.c               |  1 +
>  man/man8/tc-flower.8         | 29 ++++++++++-
>  tc/f_flower.c                | 98 +++++++++++++++++++++++++++++++++++-
>  4 files changed, 135 insertions(+), 2 deletions(-)

[...]

> +static void flower_print_cfm(struct rtattr *attr)
> +{
> +	struct rtattr *tb[TCA_FLOWER_KEY_CFM_OPT_MAX + 1];
> +	struct rtattr *v;
> +	SPRINT_BUF(out);
> +	size_t sz = 0;
> +
> +	if (!attr || !(attr->rta_type & NLA_F_NESTED))
> +		return;
> +
> +	parse_rtattr(tb, TCA_FLOWER_KEY_CFM_OPT_MAX, RTA_DATA(attr),
> +		     RTA_PAYLOAD(attr));
> +
> +	print_nl();
> +	print_string(PRINT_FP, NULL, "  cfm", NULL);
> +	open_json_object("cfm");
> +
> +	v = tb[TCA_FLOWER_KEY_CFM_MD_LEVEL];
> +	if (v) {
> +		sz += sprintf(out, " mdl %u", rta_getattr_u8(v));
> +		print_hhu(PRINT_JSON, "mdl", NULL, rta_getattr_u8(v));
> +

Unnecessary blank line

> +	}
> +
> +	v = tb[TCA_FLOWER_KEY_CFM_OPCODE];
> +	if (v) {
> +		sprintf(out + sz, " op %u", rta_getattr_u8(v));
> +		print_hhu(PRINT_JSON, "op", NULL, rta_getattr_u8(v));
> +

Likewise

> +	}
> +
> +	close_json_object();
> +	print_string(PRINT_FP, "cfm", "%s", out);
> +}