From: Vlad Buslov <vladbu@nvidia.com>
Date: Tue, 19 Oct 2021 18:17:19 +0300
Subject: net/mlx5: Bridge, extract code to lookup and del/notify entry
Patch-mainline: v5.16-rc1
Git-commit: 2deda2f1bf4e4778dc6ff62e37cedee92098cc2c
References: jsc#SLE-19253

Following two patterns in bridge code are used in multiple places where
similar code is duplicated:

- Lookup FDB entry from hashtable by address+vid pair.

- Notify software bridge and then delete existing FDB entry.

In order to improve code quality and prepare for following patch series
that also uses described patterns, extract the codes to dedicated helper
functions.

This commit doesn't change functionality.

Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c |   58 ++++++++++---------
 1 file changed, 32 insertions(+), 26 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c
@@ -888,14 +888,20 @@ mlx5_esw_bridge_fdb_entry_cleanup(struct
 	kvfree(entry);
 }
 
+static void
+mlx5_esw_bridge_fdb_entry_notify_and_cleanup(struct mlx5_esw_bridge_fdb_entry *entry,
+					     struct mlx5_esw_bridge *bridge)
+{
+	mlx5_esw_bridge_fdb_del_notify(entry);
+	mlx5_esw_bridge_fdb_entry_cleanup(entry, bridge);
+}
+
 static void mlx5_esw_bridge_fdb_flush(struct mlx5_esw_bridge *bridge)
 {
 	struct mlx5_esw_bridge_fdb_entry *entry, *tmp;
 
-	list_for_each_entry_safe(entry, tmp, &bridge->fdb_list, list) {
-		mlx5_esw_bridge_fdb_del_notify(entry);
-		mlx5_esw_bridge_fdb_entry_cleanup(entry, bridge);
-	}
+	list_for_each_entry_safe(entry, tmp, &bridge->fdb_list, list)
+		mlx5_esw_bridge_fdb_entry_notify_and_cleanup(entry, bridge);
 }
 
 static struct mlx5_esw_bridge_vlan *
@@ -1065,10 +1071,8 @@ static void mlx5_esw_bridge_vlan_flush(s
 	struct mlx5_eswitch *esw = bridge->br_offloads->esw;
 	struct mlx5_esw_bridge_fdb_entry *entry, *tmp;
 
-	list_for_each_entry_safe(entry, tmp, &vlan->fdb_list, vlan_list) {
-		mlx5_esw_bridge_fdb_del_notify(entry);
-		mlx5_esw_bridge_fdb_entry_cleanup(entry, bridge);
-	}
+	list_for_each_entry_safe(entry, tmp, &vlan->fdb_list, vlan_list)
+		mlx5_esw_bridge_fdb_entry_notify_and_cleanup(entry, bridge);
 
 	if (vlan->pkt_reformat_pop)
 		mlx5_esw_bridge_vlan_pop_cleanup(vlan, esw);
@@ -1128,6 +1132,17 @@ mlx5_esw_bridge_port_vlan_lookup(u16 vid
 }
 
 static struct mlx5_esw_bridge_fdb_entry *
+mlx5_esw_bridge_fdb_lookup(struct mlx5_esw_bridge *bridge,
+			   const unsigned char *addr, u16 vid)
+{
+	struct mlx5_esw_bridge_fdb_key key = {};
+
+	ether_addr_copy(key.addr, addr);
+	key.vid = vid;
+	return rhashtable_lookup_fast(&bridge->fdb_ht, &key, fdb_ht_params);
+}
+
+static struct mlx5_esw_bridge_fdb_entry *
 mlx5_esw_bridge_fdb_entry_init(struct net_device *dev, u16 vport_num, u16 esw_owner_vhca_id,
 			       const unsigned char *addr, u16 vid, bool added_by_user, bool peer,
 			       struct mlx5_eswitch *esw, struct mlx5_esw_bridge *bridge)
@@ -1444,7 +1459,6 @@ void mlx5_esw_bridge_fdb_update_used(str
 				     struct switchdev_notifier_fdb_info *fdb_info)
 {
 	struct mlx5_esw_bridge_fdb_entry *entry;
-	struct mlx5_esw_bridge_fdb_key key;
 	struct mlx5_esw_bridge_port *port;
 	struct mlx5_esw_bridge *bridge;
 
@@ -1453,13 +1467,11 @@ void mlx5_esw_bridge_fdb_update_used(str
 		return;
 
 	bridge = port->bridge;
-	ether_addr_copy(key.addr, fdb_info->addr);
-	key.vid = fdb_info->vid;
-	entry = rhashtable_lookup_fast(&bridge->fdb_ht, &key, fdb_ht_params);
+	entry = mlx5_esw_bridge_fdb_lookup(bridge, fdb_info->addr, fdb_info->vid);
 	if (!entry) {
 		esw_debug(br_offloads->esw->dev,
 			  "FDB entry with specified key not found (MAC=%pM,vid=%u,vport=%u)\n",
-			  key.addr, key.vid, vport_num);
+			  fdb_info->addr, fdb_info->vid, vport_num);
 		return;
 	}
 
@@ -1501,7 +1513,6 @@ void mlx5_esw_bridge_fdb_remove(struct n
 {
 	struct mlx5_eswitch *esw = br_offloads->esw;
 	struct mlx5_esw_bridge_fdb_entry *entry;
-	struct mlx5_esw_bridge_fdb_key key;
 	struct mlx5_esw_bridge_port *port;
 	struct mlx5_esw_bridge *bridge;
 
@@ -1510,18 +1521,15 @@ void mlx5_esw_bridge_fdb_remove(struct n
 		return;
 
 	bridge = port->bridge;
-	ether_addr_copy(key.addr, fdb_info->addr);
-	key.vid = fdb_info->vid;
-	entry = rhashtable_lookup_fast(&bridge->fdb_ht, &key, fdb_ht_params);
+	entry = mlx5_esw_bridge_fdb_lookup(bridge, fdb_info->addr, fdb_info->vid);
 	if (!entry) {
 		esw_warn(esw->dev,
 			 "FDB entry with specified key not found (MAC=%pM,vid=%u,vport=%u)\n",
-			 key.addr, key.vid, vport_num);
+			 fdb_info->addr, fdb_info->vid, vport_num);
 		return;
 	}
 
-	mlx5_esw_bridge_fdb_del_notify(entry);
-	mlx5_esw_bridge_fdb_entry_cleanup(entry, bridge);
+	mlx5_esw_bridge_fdb_entry_notify_and_cleanup(entry, bridge);
 }
 
 void mlx5_esw_bridge_update(struct mlx5_esw_bridge_offloads *br_offloads)
@@ -1537,13 +1545,11 @@ void mlx5_esw_bridge_update(struct mlx5_
 			if (entry->flags & MLX5_ESW_BRIDGE_FLAG_ADDED_BY_USER)
 				continue;
 
-			if (time_after(lastuse, entry->lastuse)) {
+			if (time_after(lastuse, entry->lastuse))
 				mlx5_esw_bridge_fdb_entry_refresh(entry);
-			} else if (!(entry->flags & MLX5_ESW_BRIDGE_FLAG_PEER) &&
-				   time_is_before_jiffies(entry->lastuse + bridge->ageing_time)) {
-				mlx5_esw_bridge_fdb_del_notify(entry);
-				mlx5_esw_bridge_fdb_entry_cleanup(entry, bridge);
-			}
+			else if (!(entry->flags & MLX5_ESW_BRIDGE_FLAG_PEER) &&
+				 time_is_before_jiffies(entry->lastuse + bridge->ageing_time))
+				mlx5_esw_bridge_fdb_entry_notify_and_cleanup(entry, bridge);
 		}
 	}
 }