[PATCH v5 net-next 1/6] net: bridge: add locked entry fdb flag to extend locked port feature

[Ido Schimmel]

On Sun, Aug 28, 2022 at 12:23:30PM +0200, netdev at kapio-technology.com wrote:
> On 2022-08-27 17:19, Ido Schimmel wrote:
> > On Fri, Aug 26, 2022 at 01:45:33PM +0200, Hans Schultz wrote:
> > > 
> > >  	nbp_switchdev_frame_mark(p, skb);
> > > @@ -943,6 +946,10 @@ static int br_setport(struct net_bridge_port
> > > *p, struct nlattr *tb[],
> > >  	br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
> > > BR_NEIGH_SUPPRESS);
> > >  	br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
> > >  	br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
> > > +	br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB);
> > > +
> > > +	if (!(p->flags & BR_PORT_LOCKED))
> > > +		p->flags &= ~BR_PORT_MAB;
> 
> The reason for this is that I wanted it to be so that if you have MAB
> enabled (and locked of course) and unlock the port, it will automatically
> clear both flags instead of having to first disable MAB and then unlock the
> port.

User space can just do:

# bridge link set dev swp1 locked off mab off

I prefer not to push such logic into the kernel and instead fail
explicitly. I won't argue if more people are in favor.