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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 7 Jan 2021 12:38:35 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     Vladimir Oltean <olteanv@...il.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

+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.

> +		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;