netdev - Re: [PATCH v4 net-next 5/7] net: ethtool: add an extack parameter to new rxfh

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Date: Mon, 2 Oct 2023 13:13:10 +0100
From: Martin Habets <habetsm.xilinx@...il.com>
To: edward.cree@....com
Cc: linux-net-drivers@....com, davem@...emloft.net, kuba@...nel.org,
	edumazet@...gle.com, pabeni@...hat.com,
	Edward Cree <ecree.xilinx@...il.com>, netdev@...r.kernel.org,
	sudheer.mogilappagari@...el.com, jdamato@...tly.com, andrew@...n.ch,
	mw@...ihalf.com, linux@...linux.org.uk, sgoutham@...vell.com,
	gakula@...vell.com, sbhatta@...vell.com, hkelam@...vell.com,
	saeedm@...dia.com, leon@...nel.org
Subject: Re: [PATCH v4 net-next 5/7] net: ethtool: add an extack parameter to
 new rxfh_context APIs

On Wed, Sep 27, 2023 at 07:13:36PM +0100, edward.cree@....com wrote:
> From: Edward Cree <ecree.xilinx@...il.com>
> 
> Currently passed as NULL, but will allow drivers to report back errors
>  when ethnl support for these ops is added.
> 
> Signed-off-by: Edward Cree <ecree.xilinx@...il.com>

Reviewed-by: Martin Habets <habetsm.xilinx@...il.com>

> ---
>  include/linux/ethtool.h | 9 ++++++---
>  net/core/dev.c          | 3 ++-
>  net/ethtool/ioctl.c     | 9 ++++++---
>  3 files changed, 14 insertions(+), 7 deletions(-)
> 
> diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
> index 975fda7218f8..c8963bde9289 100644
> --- a/include/linux/ethtool.h
> +++ b/include/linux/ethtool.h
> @@ -927,14 +927,17 @@ struct ethtool_ops {
>  	int	(*create_rxfh_context)(struct net_device *,
>  				       struct ethtool_rxfh_context *ctx,
>  				       const u32 *indir, const u8 *key,
> -				       const u8 hfunc, u32 rss_context);
> +				       const u8 hfunc, u32 rss_context,
> +				       struct netlink_ext_ack *extack);
>  	int	(*modify_rxfh_context)(struct net_device *,
>  				       struct ethtool_rxfh_context *ctx,
>  				       const u32 *indir, const u8 *key,
> -				       const u8 hfunc, u32 rss_context);
> +				       const u8 hfunc, u32 rss_context,
> +				       struct netlink_ext_ack *extack);
>  	int	(*remove_rxfh_context)(struct net_device *,
>  				       struct ethtool_rxfh_context *ctx,
> -				       u32 rss_context);
> +				       u32 rss_context,
> +				       struct netlink_ext_ack *extack);
>  	int	(*set_rxfh_context)(struct net_device *, const u32 *indir,
>  				    const u8 *key, const u8 hfunc,
>  				    u32 *rss_context, bool delete);
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 637218adca22..69579d9cd7ba 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -10892,7 +10892,8 @@ static void netdev_rss_contexts_free(struct net_device *dev)
>  			xa_erase(&dev->ethtool->rss_ctx, context);
>  			if (dev->ethtool_ops->create_rxfh_context)
>  				dev->ethtool_ops->remove_rxfh_context(dev, ctx,
> -								      context);
> +								      context,
> +								      NULL);
>  			else
>  				dev->ethtool_ops->set_rxfh_context(dev, indir,
>  								   key,
> diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
> index c23d2bd3cd2a..3920ddee3ee2 100644
> --- a/net/ethtool/ioctl.c
> +++ b/net/ethtool/ioctl.c
> @@ -1381,14 +1381,17 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
>  			if (create)
>  				ret = ops->create_rxfh_context(dev, ctx, indir,
>  							       hkey, rxfh.hfunc,
> -							       rxfh.rss_context);
> +							       rxfh.rss_context,
> +							       NULL);
>  			else if (delete)
>  				ret = ops->remove_rxfh_context(dev, ctx,
> -							       rxfh.rss_context);
> +							       rxfh.rss_context,
> +							       NULL);
>  			else
>  				ret = ops->modify_rxfh_context(dev, ctx, indir,
>  							       hkey, rxfh.hfunc,
> -							       rxfh.rss_context);
> +							       rxfh.rss_context,
> +							       NULL);
>  		} else {
>  			ret = ops->set_rxfh_context(dev, indir, hkey,
>  						    rxfh.hfunc,