diff options
Diffstat (limited to 'net/dsa/switch.c')
| -rw-r--r-- | net/dsa/switch.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/net/dsa/switch.c b/net/dsa/switch.c index 142b294d3446..e1fae969aa73 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -12,6 +12,7 @@ #include <linux/netdevice.h> #include <linux/notifier.h> +#include <linux/if_vlan.h> #include <net/switchdev.h> #include "dsa_priv.h" @@ -168,6 +169,43 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds, return 0; } +static int dsa_port_vlan_device_check(struct net_device *vlan_dev, + int vlan_dev_vid, + void *arg) +{ + struct switchdev_obj_port_vlan *vlan = arg; + u16 vid; + + for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { + if (vid == vlan_dev_vid) + return -EBUSY; + } + + return 0; +} + +static int dsa_port_vlan_check(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan) +{ + const struct dsa_port *dp = dsa_to_port(ds, port); + int err = 0; + + /* Device is not bridged, let it proceed with the VLAN device + * creation. + */ + if (!dp->bridge_dev) + return err; + + /* dsa_slave_vlan_rx_{add,kill}_vid() cannot use the prepare pharse and + * already checks whether there is an overlapping bridge VLAN entry + * with the same VID, so here we only need to check that if we are + * adding a bridge VLAN entry there is not an overlapping VLAN device + * claiming that VID. + */ + return vlan_for_each(dp->slave, dsa_port_vlan_device_check, + (void *)vlan); +} + static int dsa_switch_vlan_prepare_bitmap(struct dsa_switch *ds, const struct switchdev_obj_port_vlan *vlan, @@ -179,6 +217,10 @@ dsa_switch_vlan_prepare_bitmap(struct dsa_switch *ds, return -EOPNOTSUPP; for_each_set_bit(port, bitmap, ds->num_ports) { + err = dsa_port_vlan_check(ds, port, vlan); + if (err) + return err; + err = ds->ops->port_vlan_prepare(ds, port, vlan); if (err) return err; |