netdev - Re: [PATCH, net-next, v3, 1/2] ethtool: Factored out similar ethtool link settings for virtual devices to core

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Message-ID: <20191220103837.GF21614@unicorn.suse.cz>
Date:   Fri, 20 Dec 2019 11:38:37 +0100
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Cris Forno <cforno12@...ux.vnet.ibm.com>, netdev@...r.kernel.org,
        mst@...hat.com, jasowang@...hat.com, haiyangz@...rosoft.com,
        sthemmin@...rosoft.com, sashal@...nel.org, tlfalcon@...ux.ibm.com
Subject: Re: [PATCH, net-next, v3, 1/2] ethtool: Factored out similar ethtool
 link settings for virtual devices to core

On Fri, Dec 20, 2019 at 11:18:31AM +0100, Andrew Lunn wrote:
> On Thu, Dec 19, 2019 at 02:54:09PM -0600, Cris Forno wrote:
> > @@ -579,6 +579,32 @@ static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
> >  	return 0;
> >  }
> >  
> > +/* Check if the user is trying to change anything besides speed/duplex */
> > +static bool
> > +ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
> > +{
> > +	struct ethtool_link_ksettings diff1 = *cmd;
> > +	struct ethtool_link_ksettings diff2 = {};
> 
> Hi Cris
> 
> These are not the best of names. How about request and valid?
> 
> > +
> > +	/* cmd is always set so we need to clear it, validate the port type
> > +	 * and also without autonegotiation we can ignore advertising
> > +	 */
> > +	diff1.base.speed = 0;
> > +	diff2.base.port = PORT_OTHER;
> > +	ethtool_link_ksettings_zero_link_mode(&diff1, advertising);
> > +	diff1.base.duplex = 0;
> > +	diff1.base.cmd = 0;
> > +	diff1.base.link_mode_masks_nwords = 0;
> > +
> > +	return !memcmp(&diff1.base, &diff2.base, sizeof(diff1.base)) &&
> 
> linkmode_equal()
> 
> > +		bitmap_empty(diff1.link_modes.supported,
> > +			     __ETHTOOL_LINK_MODE_MASK_NBITS) &&
> 
> linkmode_empty()
> 
> 	Andrew

Please note that this series was sent to netdev mailing list twice and
there is also some discussion at the other copy (both are marked "v3").
I didn't check if the two submissions are identical, though.

Michal