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Date: Thu, 30 Sep 2010 17:45:24 -0300
From: Flavio Leitner <fleitner@...hat.com>
To: <netdev@...r.kernel.org>
Cc: Andy Gospodarek <andy@...yhouse.net>,
bonding-devel@...ts.sourceforge.net,
Jay Vosburgh <fubar@...ibm.com>,
Flavio Leitner <fleitner@...hat.com>
Subject: [PATCH v2] bonding: rejoin multicast groups on VLANs
It fixes bonding to rejoin multicast groups added
to VLAN devices on top of bonding when a failover
happens.
Signed-off-by: Flavio Leitner <fleitner@...hat.com>
---
drivers/net/bonding/bond_main.c | 61 +++++++++++++++++++++++++++++++++-----
drivers/net/bonding/bonding.h | 1 +
2 files changed, 54 insertions(+), 8 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 3b16f62..1016c09 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -865,18 +865,14 @@ static void bond_mc_del(struct bonding *bond, void *addr)
}
-/*
- * Retrieve the list of registered multicast addresses for the bonding
- * device and retransmit an IGMP JOIN request to the current active
- * slave.
- */
-static void bond_resend_igmp_join_requests(struct bonding *bond)
+static void __bond_resend_igmp_join_requests(struct net_device *dev)
{
struct in_device *in_dev;
struct ip_mc_list *im;
rcu_read_lock();
- in_dev = __in_dev_get_rcu(bond->dev);
+
+ in_dev = __in_dev_get_rcu(dev);
if (in_dev) {
for (im = in_dev->mc_list; im; im = im->next)
ip_mc_rejoin_group(im);
@@ -885,6 +881,45 @@ static void bond_resend_igmp_join_requests(struct bonding *bond)
rcu_read_unlock();
}
+
+/*
+ * Retrieve the list of registered multicast addresses for the bonding
+ * device and retransmit an IGMP JOIN request to the current active
+ * slave.
+ */
+static void bond_resend_igmp_join_requests(struct bonding *bond)
+{
+ struct net_device *vlan_dev;
+ struct vlan_entry *vlan;
+
+ read_lock(&bond->lock);
+ if (bond->kill_timers)
+ goto out;
+
+ /* rejoin all groups on bond device */
+ __bond_resend_igmp_join_requests(bond->dev);
+
+ /* rejoin all groups on vlan devices */
+ if (bond->vlgrp) {
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ vlan_dev = vlan_group_get_device(bond->vlgrp,
+ vlan->vlan_id);
+ if (vlan_dev)
+ __bond_resend_igmp_join_requests(vlan_dev);
+ }
+ }
+
+out:
+ read_unlock(&bond->lock);
+}
+
+void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ mcast_work.work);
+ bond_resend_igmp_join_requests(bond);
+}
+
/*
* flush all members of flush->mc_list from device dev->mc_list
*/
@@ -944,7 +979,9 @@ static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
netdev_for_each_mc_addr(ha, bond->dev)
dev_mc_add(new_active->dev, ha->addr);
- bond_resend_igmp_join_requests(bond);
+
+ /* rejoin multicast groups */
+ queue_delayed_work(bond->wq, &bond->mcast_work, 0);
}
}
@@ -3744,6 +3781,9 @@ static int bond_open(struct net_device *bond_dev)
bond->kill_timers = 0;
+ /* multicast retrans */
+ INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed);
+
if (bond_is_lb(bond)) {
/* bond_alb_initialize must be called before the timer
* is started.
@@ -3828,6 +3868,8 @@ static int bond_close(struct net_device *bond_dev)
break;
}
+ if (delayed_work_pending(&bond->mcast_work))
+ cancel_delayed_work(&bond->mcast_work);
if (bond_is_lb(bond)) {
/* Must be called only after all
@@ -4699,6 +4741,9 @@ static void bond_work_cancel_all(struct bonding *bond)
if (bond->params.mode == BOND_MODE_8023AD &&
delayed_work_pending(&bond->ad_work))
cancel_delayed_work(&bond->ad_work);
+
+ if (delayed_work_pending(&bond->mcast_work))
+ cancel_delayed_work(&bond->mcast_work);
}
/*
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index c6fdd85..308ed10 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -223,6 +223,7 @@ struct bonding {
struct delayed_work arp_work;
struct delayed_work alb_work;
struct delayed_work ad_work;
+ struct delayed_work mcast_work;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
struct in6_addr master_ipv6;
#endif
--
1.7.3
--
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