On Sun, Apr 10, 2022 at 04:42:27PM +0300, Arınç ÜNAL wrote: > Add BR_HAIRPIN_MODE, BR_ISOLATED and BR_MULTICAST_TO_UNICAST port flags to > BR_PORT_FLAGS_HW_OFFLOAD so that switchdev drivers which have an offloaded > data plane have a chance to reject these bridge port flags if they don't > support them yet. > > It makes the code path go through the > SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS driver handlers, which return > -EINVAL for everything they don't recognize. > > For drivers that don't catch SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS at > all, switchdev will return -EOPNOTSUPP for those which is then ignored, but > those are in the minority. > > Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx> > --- Reviewed-by: Vladimir Oltean <olteanv@xxxxxxxxx> > Let me know if this is netdev/net material instead. The thing with targeting this against "net" is that we've seen the introduction of BR_PORT_LOCKED fairly recently which has tainted the BR_PORT_FLAGS_HW_OFFLOAD macro. So backporting would conflict very quickly down the path. Sure that isn't a decisive problem, but I don't think it's worth the extra trouble of preparing special patches for the "stable" trees, and having those diverge from the current master. > > Commit log is heavily quoted from Vladimir Oltean <olteanv@xxxxxxxxx>. > > Arınç > --- > net/bridge/br_switchdev.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c > index 8cc44c367231..81400e0b26ac 100644 > --- a/net/bridge/br_switchdev.c > +++ b/net/bridge/br_switchdev.c > @@ -72,7 +72,8 @@ bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, > > /* Flags that can be offloaded to hardware */ > #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ > - BR_MCAST_FLOOD | BR_BCAST_FLOOD | BR_PORT_LOCKED) > + BR_MCAST_FLOOD | BR_BCAST_FLOOD | BR_PORT_LOCKED | \ > + BR_HAIRPIN_MODE | BR_ISOLATED | BR_MULTICAST_TO_UNICAST) > > int br_switchdev_set_port_flag(struct net_bridge_port *p, > unsigned long flags, > -- > 2.25.1 >
