mlxsw: spectrum_router: Take VID for VLAN FIDs from RIF params

Currently, when an IP address is added to a bridge that has no PVID, the
operation is rejected. An IP address addition is interpreted as a request
to create a RIF for the bridge device, but without a PVID there is no VLAN
for which the RIF should be created. Thus the correct way to create a RIF
for a bridge as a user is to first add a PVID, and then add the IP address.

Ideally this ordering requirement would not exist. RIF would be created
either because an IP address is added, or because a PVID is added,
depending on which comes last.

For that, the switchdev code (which notices the PVID change request) must
be able to request that a RIF is created with a given VLAN ID, because at
the time that the PVID notification is distributed, the PVID setting is not
yet visible for querying.

Therefore when creating a VLAN-based RIF, use mlxsw_sp_rif_params.vid to
communicate the VID, and do not determine it ad-hoc in the fid_get
callback.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index adfb1ef..e840ca9 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -8665,14 +8665,17 @@ __mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
 {
        struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
-       struct mlxsw_sp_rif_params params = {
-               .dev = l3_dev,
-       };
+       struct mlxsw_sp_rif_params params;
        u16 vid = mlxsw_sp_port_vlan->vid;
        struct mlxsw_sp_rif *rif;
        struct mlxsw_sp_fid *fid;
        int err;
 
+       params = (struct mlxsw_sp_rif_params) {
+               .dev = l3_dev,
+               .vid = vid,
+       };
+
        mlxsw_sp_rif_subport_params_init(&params, mlxsw_sp_port_vlan);
        rif = mlxsw_sp_rif_subport_get(mlxsw_sp, &params, extack);
        if (IS_ERR(rif))
@@ -8830,6 +8833,7 @@ static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp,
                .dev = l3_dev,
        };
        struct mlxsw_sp_rif *rif;
+       int err;
 
        switch (event) {
        case NETDEV_UP:
@@ -8841,6 +8845,13 @@ static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp,
                                NL_SET_ERR_MSG_MOD(extack, "Adding an IP address to 802.1ad bridge is not supported");
                                return -EOPNOTSUPP;
                        }
+                       err = br_vlan_get_pvid(l3_dev, &params.vid);
+                       if (err < 0 || !params.vid) {
+                               NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID");
+                               return -EINVAL;
+                       }
+               } else if (is_vlan_dev(l3_dev)) {
+                       params.vid = vlan_dev_vlan_id(l3_dev);
                }
                rif = mlxsw_sp_rif_create(mlxsw_sp, &params, extack);
                if (IS_ERR(rif))
@@ -9877,23 +9888,17 @@ mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif,
 {
        struct net_device *dev = mlxsw_sp_rif_dev(rif);
        struct net_device *br_dev;
-       u16 vid;
-       int err;
+
+       if (WARN_ON(!params->vid))
+               return ERR_PTR(-EINVAL);
 
        if (is_vlan_dev(dev)) {
-               vid = vlan_dev_vlan_id(dev);
                br_dev = vlan_dev_real_dev(dev);
                if (WARN_ON(!netif_is_bridge_master(br_dev)))
                        return ERR_PTR(-EINVAL);
-       } else {
-               err = br_vlan_get_pvid(dev, &vid);
-               if (err < 0 || !vid) {
-                       NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID");
-                       return ERR_PTR(-EINVAL);
-               }
        }
 
-       return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid);
+       return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, params->vid);
 }
 
 static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac)