netdev - Re: [patch net-next v2 3/3] net: devlink: move reload fail indication to devlink core and expose to user

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Date:   Sun, 8 Sep 2019 10:39:32 +0000
From:   Ido Schimmel <idosch@...lanox.com>
To:     Jiri Pirko <jiri@...nulli.us>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "dsahern@...il.com" <dsahern@...il.com>,
        "jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
        Tariq Toukan <tariqt@...lanox.com>, mlxsw <mlxsw@...lanox.com>
Subject: Re: [patch net-next v2 3/3] net: devlink: move reload fail indication
 to devlink core and expose to user

On Sat, Sep 07, 2019 at 10:54:00PM +0200, Jiri Pirko wrote:
> diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
> index 546e75dd74ac..7cb5e8c5ae0d 100644
> --- a/include/uapi/linux/devlink.h
> +++ b/include/uapi/linux/devlink.h
> @@ -410,6 +410,8 @@ enum devlink_attr {
>  	DEVLINK_ATTR_TRAP_METADATA,			/* nested */
>  	DEVLINK_ATTR_TRAP_GROUP_NAME,			/* string */
>  
> +	DEVLINK_ATTR_RELOAD_FAILED,			/* u8 0 or 1 */
> +
>  	/* add new attributes above here, update the policy in devlink.c */
>  
>  	__DEVLINK_ATTR_MAX,
> diff --git a/net/core/devlink.c b/net/core/devlink.c
> index 1e3a2288b0b2..e00a4a643d17 100644
> --- a/net/core/devlink.c
> +++ b/net/core/devlink.c
> @@ -471,6 +471,8 @@ static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
>  
>  	if (devlink_nl_put_handle(msg, devlink))
>  		goto nla_put_failure;
> +	if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))

Why not use NLA_FLAG for this?

> +		goto nla_put_failure;
>  
>  	genlmsg_end(msg, hdr);
>  	return 0;
> @@ -2677,6 +2679,21 @@ static bool devlink_reload_supported(struct devlink *devlink)
>  	return devlink->ops->reload_down && devlink->ops->reload_up;
>  }