From cc76ce9e8dc659561ee62876da2cffc03fb58cc5 Mon Sep 17 00:00:00 2001 From: Tobias Waldekranz Date: Thu, 18 Mar 2021 20:25:33 +0100 Subject: net: dsa: Add helper to resolve bridge port from DSA port In order for a driver to be able to query a bridge for information about itself, e.g. reading out port flags, it has to use a netdev that is known to the bridge. In the simple case, that is just the netdev representing the port, e.g. swp0 or swp1 in this example: br0 / \ swp0 swp1 But in the case of an offloaded lag, this will be the bond or team interface, e.g. bond0 in this example: br0 / bond0 / \ swp0 swp1 Add a helper that hides some of this complexity from the drivers. Then, redefine dsa_port_offloads_bridge_port using the helper to avoid double accounting of the set of possible offloaded uppers. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- include/net/dsa.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/net') diff --git a/include/net/dsa.h b/include/net/dsa.h index dac303edd33d..57b2c49f72f4 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -493,6 +493,20 @@ static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) return dp->vlan_filtering; } +static inline +struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) +{ + if (!dp->bridge_dev) + return NULL; + + if (dp->lag_dev) + return dp->lag_dev; + else if (dp->hsr_dev) + return dp->hsr_dev; + + return dp->slave; +} + typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, bool is_static, void *data); struct dsa_switch_ops { -- cgit v1.2.3