netdev - Re: [PATCH net-next v9 1/9] devlink: Introduce new attribute 'tx

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Message-ID: <20221104190724.59e614dd@kernel.org>
Date:   Fri, 4 Nov 2022 19:07:24 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Michal Wilczynski <michal.wilczynski@...el.com>
Cc:     netdev@...r.kernel.org, alexandr.lobakin@...el.com,
        jacob.e.keller@...el.com, jesse.brandeburg@...el.com,
        przemyslaw.kitszel@...el.com, anthony.l.nguyen@...el.com,
        ecree.xilinx@...il.com, jiri@...nulli.us
Subject: Re: [PATCH net-next v9 1/9] devlink: Introduce new attribute
 'tx_priority' to devlink-rate

On Fri,  4 Nov 2022 15:30:54 +0100 Michal Wilczynski wrote:
> +	DEVLINK_ATTR_RATE_TX_PRIORITY,		/* u16 */

All netlink attributes are padded out to 4 bytes, please make this u32,
you shouldn't use smaller values at netlink level unless it's carrying
protocol fields with fixed width.

> +	int (*rate_leaf_tx_priority_set)(struct devlink_rate *devlink_rate, void *priv,
> +					 u64 tx_priority, struct netlink_ext_ack *extack);

And why make the driver API u64?