net: dsa: add VLAN notifier

Add two new DSA_NOTIFIER_VLAN_ADD and DSA_NOTIFIER_VLAN_DEL events to
notify not only a single switch, but all switches of a the fabric when
an VLAN entry is added or removed.

For the moment, keep the current behavior and ignore other switches.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 43 insertions, 0 deletions

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index b7e8e45869fc..c1e4b2d5a3ae 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -158,6 +158,43 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds,
         return ds->ops->port_mdb_del(ds, info->port, mdb);
 }
 
+static int dsa_switch_vlan_add(struct dsa_switch *ds,
+                               struct dsa_notifier_vlan_info *info)
+{
+        const struct switchdev_obj_port_vlan *vlan = info->vlan;
+        struct switchdev_trans *trans = info->trans;
+
+        /* Do not care yet about other switch chips of the fabric */
+        if (ds->index != info->sw_index)
+                return 0;
+
+        if (switchdev_trans_ph_prepare(trans)) {
+                if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
+                        return -EOPNOTSUPP;
+
+                return ds->ops->port_vlan_prepare(ds, info->port, vlan, trans);
+        }
+
+        ds->ops->port_vlan_add(ds, info->port, vlan, trans);
+
+        return 0;
+}
+
+static int dsa_switch_vlan_del(struct dsa_switch *ds,
+                               struct dsa_notifier_vlan_info *info)
+{
+        const struct switchdev_obj_port_vlan *vlan = info->vlan;
+
+        /* Do not care yet about other switch chips of the fabric */
+        if (ds->index != info->sw_index)
+                return 0;
+
+        if (!ds->ops->port_vlan_del)
+                return -EOPNOTSUPP;
+
+        return ds->ops->port_vlan_del(ds, info->port, vlan);
+}
+
 static int dsa_switch_event(struct notifier_block *nb,
                             unsigned long event, void *info)
 {
@@ -186,6 +223,12 @@ static int dsa_switch_event(struct notifier_block *nb,
         case DSA_NOTIFIER_MDB_DEL:
                 err = dsa_switch_mdb_del(ds, info);
                 break;
+        case DSA_NOTIFIER_VLAN_ADD:
+                err = dsa_switch_vlan_add(ds, info);
+                break;
+        case DSA_NOTIFIER_VLAN_DEL:
+                err = dsa_switch_vlan_del(ds, info);
+                break;
         default:
                 err = -EOPNOTSUPP;
                 break;