@@ -2016,15 +2016,6 @@ int b53_br_flags(struct dsa_switch *ds, int port,
}
EXPORT_SYMBOL(b53_br_flags);
-int b53_set_mrouter(struct dsa_switch *ds, int port, bool mrouter,
- struct netlink_ext_ack *extack)
-{
- b53_port_set_mcast_flood(ds->priv, port, mrouter);
-
- return 0;
-}
-EXPORT_SYMBOL(b53_set_mrouter);
-
static bool b53_possible_cpu_port(struct dsa_switch *ds, int port)
{
/* Broadcom switches will accept enabling Broadcom tags on the
@@ -2268,7 +2259,6 @@ static const struct dsa_switch_ops b53_switch_ops = {
.port_bridge_leave = b53_br_leave,
.port_pre_bridge_flags = b53_br_flags_pre,
.port_bridge_flags = b53_br_flags,
- .port_set_mrouter = b53_set_mrouter,
.port_stp_state_set = b53_br_set_stp_state,
.port_fast_age = b53_br_fast_age,
.port_vlan_filtering = b53_vlan_filtering,
@@ -328,8 +328,6 @@ int b53_br_flags_pre(struct dsa_switch *ds, int port,
int b53_br_flags(struct dsa_switch *ds, int port,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack);
-int b53_set_mrouter(struct dsa_switch *ds, int port, bool mrouter,
- struct netlink_ext_ack *extack);
int b53_setup_devlink_resources(struct dsa_switch *ds);
void b53_port_event(struct dsa_switch *ds, int port);
void b53_phylink_validate(struct dsa_switch *ds, int port,
@@ -1199,7 +1199,6 @@ static const struct dsa_switch_ops bcm_sf2_ops = {
.port_pre_bridge_flags = b53_br_flags_pre,
.port_bridge_flags = b53_br_flags,
.port_stp_state_set = b53_br_set_stp_state,
- .port_set_mrouter = b53_set_mrouter,
.port_fast_age = b53_br_fast_age,
.port_vlan_filtering = b53_vlan_filtering,
.port_vlan_add = b53_vlan_add,
@@ -5781,23 +5781,6 @@ static int mv88e6xxx_port_bridge_flags(struct dsa_switch *ds, int port,
return err;
}
-static int mv88e6xxx_port_set_mrouter(struct dsa_switch *ds, int port,
- bool mrouter,
- struct netlink_ext_ack *extack)
-{
- struct mv88e6xxx_chip *chip = ds->priv;
- int err;
-
- if (!chip->info->ops->port_set_mcast_flood)
- return -EOPNOTSUPP;
-
- mv88e6xxx_reg_lock(chip);
- err = chip->info->ops->port_set_mcast_flood(chip, port, mrouter);
- mv88e6xxx_reg_unlock(chip);
-
- return err;
-}
-
static bool mv88e6xxx_lag_can_offload(struct dsa_switch *ds,
struct net_device *lag,
struct netdev_lag_upper_info *info)
@@ -6099,7 +6082,6 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
.port_bridge_leave = mv88e6xxx_port_bridge_leave,
.port_pre_bridge_flags = mv88e6xxx_port_pre_bridge_flags,
.port_bridge_flags = mv88e6xxx_port_bridge_flags,
- .port_set_mrouter = mv88e6xxx_port_set_mrouter,
.port_stp_state_set = mv88e6xxx_port_stp_state_set,
.port_fast_age = mv88e6xxx_port_fast_age,
.port_vlan_filtering = mv88e6xxx_port_vlan_filtering,
@@ -699,8 +699,6 @@ struct dsa_switch_ops {
int (*port_bridge_flags)(struct dsa_switch *ds, int port,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack);
- int (*port_set_mrouter)(struct dsa_switch *ds, int port, bool mrouter,
- struct netlink_ext_ack *extack);
/*
* VLAN support
@@ -234,8 +234,6 @@ int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
int dsa_port_bridge_flags(const struct dsa_port *dp,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack);
-int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
- struct netlink_ext_ack *extack);
int dsa_port_vlan_add(struct dsa_port *dp,
const struct switchdev_obj_port_vlan *vlan,
struct netlink_ext_ack *extack);
@@ -597,17 +597,6 @@ int dsa_port_bridge_flags(const struct dsa_port *dp,
return ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
}
-int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
- struct netlink_ext_ack *extack)
-{
- struct dsa_switch *ds = dp->ds;
-
- if (!ds->ops->port_set_mrouter)
- return -EOPNOTSUPP;
-
- return ds->ops->port_set_mrouter(ds, dp->index, mrouter, extack);
-}
-
int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
bool targeted_match)
{
@@ -314,12 +314,6 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
break;
- case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
- if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
- return -EOPNOTSUPP;
-
- ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, extack);
- break;
default:
ret = -EOPNOTSUPP;
break;
Commit 08cc83cc7fd8 ("net: dsa: add support for BRIDGE_MROUTER attribute") added an option for users to turn off multicast flooding towards the CPU if they turn off the IGMP querier on a bridge which already has enslaved ports (echo 0 > /sys/class/net/br0/bridge/multicast_router). And commit a8b659e7ff75 ("net: dsa: act as passthrough for bridge port flags") simply papered over that issue, because it moved the decision to flood the CPU with multicast (or not) from the DSA core down to individual drivers, instead of taking a more radical position then. The truth is that disabling multicast flooding to the CPU is simply something we are not prepared to do now, if at all. Some reasons: - ICMP6 neighbor solicitation messages are unregistered multicast packets as far as the bridge is concerned. So if we stop flooding multicast, the outside world cannot ping the bridge device's IPv6 link-local address. - There might be foreign interfaces bridged with our DSA switch ports (sending a packet towards the host does not necessarily equal termination, but maybe software forwarding). So if there is no one interested in that multicast traffic in the local network stack, that doesn't mean nobody is. - PTP over L4 (IPv4, IPv6) is multicast, but is unregistered as far as the bridge is concerned. This should reach the CPU port. - The switch driver might not do FDB partitioning. And since we don't even bother to do more fine-grained flood disabling (such as "disable flooding _from_port_N_ towards the CPU port" as opposed to "disable flooding _from_any_port_ towards the CPU port"), this breaks standalone ports, or even multiple bridges where one has an IGMP querier and one doesn't. Reverting the logic makes all of the above work. Fixes: a8b659e7ff75 ("net: dsa: act as passthrough for bridge port flags") Fixes: 08cc83cc7fd8 ("net: dsa: add support for BRIDGE_MROUTER attribute") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- v1->v2: delete all occurrences of b53_set_mrouter drivers/net/dsa/b53/b53_common.c | 10 ---------- drivers/net/dsa/b53/b53_priv.h | 2 -- drivers/net/dsa/bcm_sf2.c | 1 - drivers/net/dsa/mv88e6xxx/chip.c | 18 ------------------ include/net/dsa.h | 2 -- net/dsa/dsa_priv.h | 2 -- net/dsa/port.c | 11 ----------- net/dsa/slave.c | 6 ------ 8 files changed, 52 deletions(-)