netdev - [PATCH net-next v1 5/9] bonding: convert bond_has_this

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Date:	Mon, 26 Aug 2013 22:32:38 +0200
From:	Veaceslav Falico <vfalico@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Veaceslav Falico <vfalico@...hat.com>,
	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>
Subject: [PATCH net-next v1 5/9] bonding: convert bond_has_this_ip() to use upper devices

Currently, bond_has_this_ip() is aware only of vlan upper devices, and thus
will return false if the address is associated with the upper bridge or any
other device, and thus will break the arp logic.

Fix this by using the upper device list. For every upper device we verify
if the address associated with it is our address, and if yes - return true.

v1: use netdev_for_each_upper_dev()

CC: Jay Vosburgh <fubar@...ibm.com>
CC: Andy Gospodarek <andy@...yhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
---
 drivers/net/bonding/bond_main.c |   25 +++++++++++++------------
 1 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 40eb250..dbac1ce 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2392,24 +2392,25 @@ re_arm:
 	}
 }
 
-static int bond_has_this_ip(struct bonding *bond, __be32 ip)
+static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
 {
-	struct vlan_entry *vlan;
-	struct net_device *vlan_dev;
+	struct net_device *upper;
+	struct list_head *iter;
+	bool ret = false;
 
 	if (ip == bond_confirm_addr(bond->dev, 0, ip))
-		return 1;
+		return true;
 
-	list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
-		rcu_read_lock();
-		vlan_dev = __vlan_find_dev_deep(bond->dev, htons(ETH_P_8021Q),
-						vlan->vlan_id);
-		rcu_read_unlock();
-		if (vlan_dev && ip == bond_confirm_addr(vlan_dev, 0, ip))
-			return 1;
+	rcu_read_lock();
+	netdev_for_each_upper_dev(bond->dev, upper, iter) {
+		if (ip == bond_confirm_addr(upper, 0, ip)) {
+			ret = true;
+			break;
+		}
 	}
+	rcu_read_unlock();
 
-	return 0;
+	return ret;
 }
 
 /*
-- 
1.7.1

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