linux-kernel - Re: [PATCH net-next v17 13/14] net: ethtool: strset: Allow querying phy stats by index

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Message-ID: <dc89e5ea-8495-4f1b-a86b-f49f7ac8bd22@csgroup.eu>
Date: Wed, 14 Aug 2024 16:32:47 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>, davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 thomas.petazzoni@...tlin.com, Andrew Lunn <andrew@...n.ch>,
 Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Russell King <linux@...linux.org.uk>,
 linux-arm-kernel@...ts.infradead.org, Herve Codina
 <herve.codina@...tlin.com>, Florian Fainelli <f.fainelli@...il.com>,
 Heiner Kallweit <hkallweit1@...il.com>,
 Vladimir Oltean <vladimir.oltean@....com>,
 Köry Maincent <kory.maincent@...tlin.com>,
 Jesse Brandeburg <jesse.brandeburg@...el.com>, Marek Behún
 <kabel@...nel.org>, Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
 Oleksij Rempel <o.rempel@...gutronix.de>,
 Nicolò Veronese <nicveronese@...il.com>,
 Simon Horman <horms@...nel.org>, mwojtas@...omium.org,
 Nathan Chancellor <nathan@...nel.org>, Antoine Tenart <atenart@...nel.org>,
 Marc Kleine-Budde <mkl@...gutronix.de>,
 Dan Carpenter <dan.carpenter@...aro.org>,
 Romain Gantois <romain.gantois@...tlin.com>
Subject: Re: [PATCH net-next v17 13/14] net: ethtool: strset: Allow querying
 phy stats by index



Le 09/07/2024 à 08:30, Maxime Chevallier a écrit :
> The ETH_SS_PHY_STATS command gets PHY statistics. Use the phydev pointer
> from the ethnl request to allow query phy stats from each PHY on the
> link.
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
Tested-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   net/ethtool/strset.c | 24 +++++++++++++++++-------
>   1 file changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
> index 56b99606f00b..b3382b3cf325 100644
> --- a/net/ethtool/strset.c
> +++ b/net/ethtool/strset.c
> @@ -126,7 +126,7 @@ struct strset_reply_data {
>   
>   const struct nla_policy ethnl_strset_get_policy[] = {
>   	[ETHTOOL_A_STRSET_HEADER]	=
> -		NLA_POLICY_NESTED(ethnl_header_policy),
> +		NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
>   	[ETHTOOL_A_STRSET_COUNTS_ONLY]	= { .type = NLA_FLAG },
>   };
> @@ -233,17 +233,18 @@ static void strset_cleanup_data(struct ethnl_reply_data *reply_base)
>   }
>   
>   static int strset_prepare_set(struct strset_info *info, struct net_device *dev,
> -			      unsigned int id, bool counts_only)
> +			      struct phy_device *phydev, unsigned int id,
> +			      bool counts_only)
>   {
>   	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
>   	const struct ethtool_ops *ops = dev->ethtool_ops;
>   	void *strings;
>   	int count, ret;
>   
> -	if (id == ETH_SS_PHY_STATS && dev->phydev &&
> +	if (id == ETH_SS_PHY_STATS && phydev &&
>   	    !ops->get_ethtool_phy_stats && phy_ops &&
>   	    phy_ops->get_sset_count)
> -		ret = phy_ops->get_sset_count(dev->phydev);
> +		ret = phy_ops->get_sset_count(phydev);
>   	else if (ops->get_sset_count && ops->get_strings)
>   		ret = ops->get_sset_count(dev, id);
>   	else
> @@ -258,10 +259,10 @@ static int strset_prepare_set(struct strset_info *info, struct net_device *dev,
>   		strings = kcalloc(count, ETH_GSTRING_LEN, GFP_KERNEL);
>   		if (!strings)
>   			return -ENOMEM;
> -		if (id == ETH_SS_PHY_STATS && dev->phydev &&
> +		if (id == ETH_SS_PHY_STATS && phydev &&
>   		    !ops->get_ethtool_phy_stats && phy_ops &&
>   		    phy_ops->get_strings)
> -			phy_ops->get_strings(dev->phydev, strings);
> +			phy_ops->get_strings(phydev, strings);
>   		else
>   			ops->get_strings(dev, id, strings);
>   		info->strings = strings;
> @@ -279,6 +280,8 @@ static int strset_prepare_data(const struct ethnl_req_info *req_base,
>   	const struct strset_req_info *req_info = STRSET_REQINFO(req_base);
>   	struct strset_reply_data *data = STRSET_REPDATA(reply_base);
>   	struct net_device *dev = reply_base->dev;
> +	struct nlattr **tb = info->attrs;
> +	struct phy_device *phydev;
>   	unsigned int i;
>   	int ret;
>   
> @@ -296,6 +299,13 @@ static int strset_prepare_data(const struct ethnl_req_info *req_base,
>   		return 0;
>   	}
>   
> +	phydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_HEADER_FLAGS],
> +				      info->extack);
> +
> +	/* phydev can be NULL, check for errors only */
> +	if (IS_ERR(phydev))
> +		return PTR_ERR(phydev);
> +
>   	ret = ethnl_ops_begin(dev);
>   	if (ret < 0)
>   		goto err_strset;
> @@ -304,7 +314,7 @@ static int strset_prepare_data(const struct ethnl_req_info *req_base,
>   		    !data->sets[i].per_dev)
>   			continue;
>   
> -		ret = strset_prepare_set(&data->sets[i], dev, i,
> +		ret = strset_prepare_set(&data->sets[i], dev, phydev, i,
>   					 req_info->counts_only);
>   		if (ret < 0)
>   			goto err_ops;