netdev - Re: [PATCH v3 net-next 03/11] net: switchdev: remove the transaction structure from port object notifiers

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Date:   Thu, 7 Jan 2021 13:04:00 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     Vladimir Oltean <olteanv@...il.com>, petrm@...dia.com
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Vadym Kochan <vkochan@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Ivan Vecera <ivecera@...hat.com>
Subject: Re: [PATCH v3 net-next 03/11] net: switchdev: remove the transaction
 structure from port object notifiers

On Thu, Jan 07, 2021 at 12:40:51PM +0200, Ido Schimmel wrote:
> Forgot to actually add Petr
> 
> On Thu, Jan 07, 2021 at 12:38:39PM +0200, Ido Schimmel wrote:
> > +Petr
> > 
> > On Thu, Jan 07, 2021 at 01:17:20AM +0200, Vladimir Oltean wrote:
> > >  static int mlxsw_sp_port_obj_add(struct net_device *dev,
> > >  				 const struct switchdev_obj *obj,
> > > -				 struct switchdev_trans *trans,
> > >  				 struct netlink_ext_ack *extack)
> > >  {
> > >  	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
> > >  	const struct switchdev_obj_port_vlan *vlan;
> > > +	struct switchdev_trans trans;
> > >  	int err = 0;
> > >  
> > >  	switch (obj->id) {
> > >  	case SWITCHDEV_OBJ_ID_PORT_VLAN:
> > >  		vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
> > > -		err = mlxsw_sp_port_vlans_add(mlxsw_sp_port, vlan, trans,
> > > +
> > 
> > Got the regression results. The call to mlxsw_sp_span_respin() should be
> > placed here because it needs to be triggered regardless of the return
> > value of mlxsw_sp_port_vlans_add().
> > 
> > I'm looking into another failure, which might not be related to these
> > patches. I will also have results with a debug kernel tomorrow (takes
> > almost a day to complete). Will let you know.

Please ignore the comment about the additional failure. Not related to
these patches.

Thanks

> > 
> > > +		trans.ph_prepare = true;
> > > +		err = mlxsw_sp_port_vlans_add(mlxsw_sp_port, vlan, &trans,
> > >  					      extack);
> > > +		if (err)
> > > +			break;
> > >  
> > > -		if (switchdev_trans_ph_prepare(trans)) {
> > > -			/* The event is emitted before the changes are actually
> > > -			 * applied to the bridge. Therefore schedule the respin
> > > -			 * call for later, so that the respin logic sees the
> > > -			 * updated bridge state.
> > > -			 */
> > > -			mlxsw_sp_span_respin(mlxsw_sp_port->mlxsw_sp);
> > > -		}
> > > +		/* The event is emitted before the changes are actually
> > > +		 * applied to the bridge. Therefore schedule the respin
> > > +		 * call for later, so that the respin logic sees the
> > > +		 * updated bridge state.
> > > +		 */
> > > +		mlxsw_sp_span_respin(mlxsw_sp_port->mlxsw_sp);
> > > +
> > > +		trans.ph_prepare = false;
> > > +		err = mlxsw_sp_port_vlans_add(mlxsw_sp_port, vlan, &trans,
> > > +					      extack);
> > >  		break;
> > >  	case SWITCHDEV_OBJ_ID_PORT_MDB:
> > >  		err = mlxsw_sp_port_mdb_add(mlxsw_sp_port,
> > > -					    SWITCHDEV_OBJ_PORT_MDB(obj),
> > > -					    trans);
> > > +					    SWITCHDEV_OBJ_PORT_MDB(obj));
> > >  		break;
> > >  	default:
> > >  		err = -EOPNOTSUPP;