net: bridge: propagate extack through switchdev_port_attr_set

The benefit is the ability to propagate errors from switchdev drivers
for the SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING and
SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL attributes.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/switchdev.h

@@ -247,7 +247,8 @@ switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
 
 void switchdev_deferred_process(void);
 int switchdev_port_attr_set(struct net_device *dev,
-			    const struct switchdev_attr *attr);
+			    const struct switchdev_attr *attr,
+			    struct netlink_ext_ack *extack);
 int switchdev_port_obj_add(struct net_device *dev,
 			   const struct switchdev_obj *obj,
 			   struct netlink_ext_ack *extack);

net/bridge/br_mrp_switchdev.c

@@ -178,7 +178,7 @@ int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state)
 	};
 	int err;
 
-	err = switchdev_port_attr_set(p->dev, &attr);
+	err = switchdev_port_attr_set(p->dev, &attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		br_warn(p->br, "error setting offload MRP state on port %u(%s)\n",
 			(unsigned int)p->port_no, p->dev->name);
@@ -196,7 +196,7 @@ int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
 	};
 	int err;
 
-	err = switchdev_port_attr_set(p->dev, &attr);
+	err = switchdev_port_attr_set(p->dev, &attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		return err;
 

net/bridge/br_multicast.c

@@ -1381,7 +1381,7 @@ static void br_mc_router_state_change(struct net_bridge *p,
 		.u.mrouter = is_mc_router,
 	};
 
-	switchdev_port_attr_set(p->dev, &attr);
+	switchdev_port_attr_set(p->dev, &attr, NULL);
 }
 
 static void br_multicast_local_router_expired(struct timer_list *t)
@@ -1602,7 +1602,7 @@ static void br_mc_disabled_update(struct net_device *dev, bool value)
 		.u.mc_disabled = !value,
 	};
 
-	switchdev_port_attr_set(dev, &attr);
+	switchdev_port_attr_set(dev, &attr, NULL);
 }
 
 int br_multicast_add_port(struct net_bridge_port *port)
@@ -2645,7 +2645,7 @@ static void br_port_mc_router_state_change(struct net_bridge_port *p,
 		.u.mrouter = is_mc_router,
 	};
 
-	switchdev_port_attr_set(p->dev, &attr);
+	switchdev_port_attr_set(p->dev, &attr, NULL);
 }
 
 /*

net/bridge/br_netlink.c

@@ -1221,7 +1221,7 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 	if (data[IFLA_BR_VLAN_PROTOCOL]) {
 		__be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 
-		err = __br_vlan_set_proto(br, vlan_proto);
+		err = __br_vlan_set_proto(br, vlan_proto, extack);
 		if (err)
 			return err;
 	}

net/bridge/br_private.h

@@ -1087,7 +1087,8 @@ struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 void br_recalculate_fwd_mask(struct net_bridge *br);
 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
 			  struct netlink_ext_ack *extack);
-int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
+int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
+			struct netlink_ext_ack *extack);
 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
 		      struct netlink_ext_ack *extack);
 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);

net/bridge/br_stp.c

@@ -43,7 +43,7 @@ void br_set_state(struct net_bridge_port *p, unsigned int state)
 		return;
 
 	p->state = state;
-	err = switchdev_port_attr_set(p->dev, &attr);
+	err = switchdev_port_attr_set(p->dev, &attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",
 				(unsigned int) p->port_no, p->dev->name);
@@ -591,7 +591,7 @@ int __set_ageing_time(struct net_device *dev, unsigned long t)
 	};
 	int err;
 
-	err = switchdev_port_attr_set(dev, &attr);
+	err = switchdev_port_attr_set(dev, &attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		return err;
 

net/bridge/br_switchdev.c

@@ -96,9 +96,11 @@ int br_switchdev_set_port_flag(struct net_bridge_port *p,
 	attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS;
 	attr.flags = SWITCHDEV_F_DEFER;
 
-	err = switchdev_port_attr_set(p->dev, &attr);
+	err = switchdev_port_attr_set(p->dev, &attr, extack);
 	if (err) {
-		NL_SET_ERR_MSG_MOD(extack, "error setting offload flag on port");
+		if (extack && !extack->_msg)
+			NL_SET_ERR_MSG_MOD(extack,
+					   "error setting offload flag on port");
 		return err;
 	}
 

net/bridge/br_vlan.c

@@ -820,7 +820,7 @@ int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
 	if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
 		return 0;
 
-	err = switchdev_port_attr_set(br->dev, &attr);
+	err = switchdev_port_attr_set(br->dev, &attr, extack);
 	if (err && err != -EOPNOTSUPP)
 		return err;
 
@@ -850,7 +850,8 @@ int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
 }
 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
 
-int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
+int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
+			struct netlink_ext_ack *extack)
 {
 	struct switchdev_attr attr = {
 		.orig_dev = br->dev,
@@ -867,7 +868,7 @@ int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
 	if (br->vlan_proto == proto)
 		return 0;
 
-	err = switchdev_port_attr_set(br->dev, &attr);
+	err = switchdev_port_attr_set(br->dev, &attr, extack);
 	if (err && err != -EOPNOTSUPP)
 		return err;
 
@@ -897,7 +898,7 @@ int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
 
 err_filt:
 	attr.u.vlan_protocol = ntohs(oldproto);
-	switchdev_port_attr_set(br->dev, &attr);
+	switchdev_port_attr_set(br->dev, &attr, NULL);
 
 	list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
 		vlan_vid_del(p->dev, proto, vlan->vid);
@@ -917,7 +918,7 @@ int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
 	if (!eth_type_vlan(htons(val)))
 		return -EPROTONOSUPPORT;
 
-	return __br_vlan_set_proto(br, htons(val));
+	return __br_vlan_set_proto(br, htons(val), extack);
 }
 
 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
@@ -1165,7 +1166,7 @@ int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
 	if (!vg)
 		goto out;
 
-	ret = switchdev_port_attr_set(p->dev, &attr);
+	ret = switchdev_port_attr_set(p->dev, &attr, extack);
 	if (ret && ret != -EOPNOTSUPP)
 		goto err_vlan_enabled;
 

net/switchdev/switchdev.c

@@ -100,7 +100,8 @@ static int switchdev_deferred_enqueue(struct net_device *dev,
 
 static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
 				      struct net_device *dev,
-				      const struct switchdev_attr *attr)
+				      const struct switchdev_attr *attr,
+				      struct netlink_ext_ack *extack)
 {
 	int err;
 	int rc;
@@ -111,7 +112,7 @@ static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
 	};
 
 	rc = call_switchdev_blocking_notifiers(nt, dev,
-					       &attr_info.info, NULL);
+					       &attr_info.info, extack);
 	err = notifier_to_errno(rc);
 	if (err) {
 		WARN_ON(!attr_info.handled);
@@ -125,9 +126,11 @@ static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
 }
 
 static int switchdev_port_attr_set_now(struct net_device *dev,
-				       const struct switchdev_attr *attr)
+				       const struct switchdev_attr *attr,
+				       struct netlink_ext_ack *extack)
 {
-	return switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr);
+	return switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
+					  extack);
 }
 
 static void switchdev_port_attr_set_deferred(struct net_device *dev,
@@ -136,7 +139,7 @@ static void switchdev_port_attr_set_deferred(struct net_device *dev,
 	const struct switchdev_attr *attr = data;
 	int err;
 
-	err = switchdev_port_attr_set_now(dev, attr);
+	err = switchdev_port_attr_set_now(dev, attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n",
 			   err, attr->id);
@@ -156,17 +159,19 @@ static int switchdev_port_attr_set_defer(struct net_device *dev,
  *
  *	@dev: port device
  *	@attr: attribute to set
+ *	@extack: netlink extended ack, for error message propagation
  *
  *	rtnl_lock must be held and must not be in atomic section,
  *	in case SWITCHDEV_F_DEFER flag is not set.
  */
 int switchdev_port_attr_set(struct net_device *dev,
-			    const struct switchdev_attr *attr)
+			    const struct switchdev_attr *attr,
+			    struct netlink_ext_ack *extack)
 {
 	if (attr->flags & SWITCHDEV_F_DEFER)
 		return switchdev_port_attr_set_defer(dev, attr);
 	ASSERT_RTNL();
-	return switchdev_port_attr_set_now(dev, attr);
+	return switchdev_port_attr_set_now(dev, attr, extack);
 }
 EXPORT_SYMBOL_GPL(switchdev_port_attr_set);