netdev - Re: [PATCH net-next v2 12/14] net: qede: use faked extack in qede_flow_spec_to

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Message-ID: <20240510113033.GO2347895@kernel.org>
Date: Fri, 10 May 2024 12:30:33 +0100
From: Simon Horman <horms@...nel.org>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Manish Chopra <manishc@...vell.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>
Subject: Re: [PATCH net-next v2 12/14] net: qede: use faked extack in
 qede_flow_spec_to_rule()

On Wed, May 08, 2024 at 02:34:00PM +0000, Asbjørn Sloth Tønnesen wrote:
> Since qede_parse_flow_attr() now does error reporting
> through extack, then give it a fake extack and extract the
> error message afterwards if one was set.
> 
> The extracted error message is then passed on through
> DP_NOTICE(), including messages that was earlier issued
> with DP_INFO().
> 
> This fake extack approach is already used by
> mlxsw_env_linecard_modules_power_mode_apply() in
> drivers/net/ethernet/mellanox/mlxsw/core_env.c
> 
> Only compile tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
> 
> ---
> Note:
> Even through _msg is marked in include/linux/netlink.h as
> "don't access directly, use NL_SET_ERR_MSG", then the comment
> above NL_SET_ERR_MSG, seams to indicate that it should be fine
> to access it directly if for reading, as is done other places.
> I could also add a NL_GET_ERR_MSG but I would rather not do that
> in this series.

Reviewed-by: Simon Horman <horms@...nel.org>