netdev - [PATCH net-next v11 5/7] bonding: Update to bond_arp_send

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Message-ID: <20250930012857.2270721-6-wilder@us.ibm.com>
Date: Mon, 29 Sep 2025 18:27:11 -0700
From: David Wilder <wilder@...ibm.com>
To: netdev@...r.kernel.org
Cc: jv@...sburgh.net, wilder@...ibm.com, pradeeps@...ux.vnet.ibm.com,
        pradeep@...ibm.com, i.maximets@....org, amorenoz@...hat.com,
        haliu@...hat.com, stephen@...workplumber.org, horms@...nel.org,
        kuba@...nel.org, pabeni@...hat.com, andrew+netdev@...n.ch,
        edumazet@...gle.com
Subject: [PATCH net-next v11 5/7] bonding: Update to bond_arp_send_all() to use supplied vlan tags

bond_arp_send_all() will pass the vlan tags supplied by
the user to bond_arp_send(). If vlan tags have not been
supplied the vlans in the path to the target will be
discovered by bond_verify_device_path().

bond_uninit() is also updated to free vlan tags when a
bond is destroyed.

Signed-off-by: David Wilder <wilder@...ibm.com>
---
 drivers/net/bonding/bond_main.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 57cf4585816d..333f7fef9c8b 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3064,18 +3064,21 @@ struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 
 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
 {
-	struct rtable *rt;
-	struct bond_vlan_tag *tags;
 	struct bond_arp_target *targets = bond->params.arp_targets;
+	char pbuf[BOND_OPTION_STRING_MAX_SIZE];
+	struct bond_vlan_tag *tags;
 	__be32 target_ip, addr;
+	struct rtable *rt;
+	u32 flags;
 	int i;
 
 	for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i].target_ip; i++) {
 		target_ip = targets[i].target_ip;
 		tags = targets[i].tags;
+		flags = targets[i].flags;
 
-		slave_dbg(bond->dev, slave->dev, "%s: target %pI4\n",
-			  __func__, &target_ip);
+		slave_dbg(bond->dev, slave->dev, "%s: target %s\n", __func__,
+			  bond_arp_target_to_string(&targets[i], pbuf, sizeof(pbuf)));
 
 		/* Find out through which dev should the packet go */
 		rt = ip_route_output(dev_net(bond->dev), target_ip, 0, 0, 0,
@@ -3097,9 +3100,11 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
 		if (rt->dst.dev == bond->dev)
 			goto found;
 
-		rcu_read_lock();
-		tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
-		rcu_read_unlock();
+		if (!tags) {
+			rcu_read_lock();
+			tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
+			rcu_read_unlock();
+		}
 
 		if (!IS_ERR_OR_NULL(tags))
 			goto found;
@@ -3115,7 +3120,8 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
 		addr = bond_confirm_addr(rt->dst.dev, target_ip, 0);
 		ip_rt_put(rt);
 		bond_arp_send(slave, ARPOP_REQUEST, target_ip, addr, tags);
-		kfree(tags);
+		if  (!(flags & BOND_TARGET_USERTAGS))
+			kfree(tags);
 	}
 }
 
@@ -6047,6 +6053,7 @@ static void bond_uninit(struct net_device *bond_dev)
 	bond_for_each_slave(bond, slave, iter)
 		__bond_release_one(bond_dev, slave->dev, true, true);
 	netdev_info(bond_dev, "Released all slaves\n");
+	bond_free_vlan_tags(bond->params.arp_targets);
 
 #ifdef CONFIG_XFRM_OFFLOAD
 	mutex_destroy(&bond->ipsec_lock);
-- 
2.50.1