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authorMoni Shoua <monis@Voltaire.COM>2009-07-15 04:56:31 +0000
committerDavid S. Miller <davem@davemloft.net>2009-07-16 18:05:23 -0700
commite36b9d16c6a6d0f59803b3ef04ff3c22c3844c10 (patch)
treee4fcf87123ac80923fe0f3c83070d74d32d450e5 /drivers
parent37b76c697f4ac082e9923dfa8e8aecc8bc54a8e1 (diff)
bonding: clean muticast addresses when device changes type
Bonding device forbids slave device of different types under the same master. However, it is possible for a bonding master to change type during its lifetime. This can be either from ARPHRD_ETHER to ARPHRD_INFINIBAND or the other way arround. The change of type requires device level multicast address cleanup because device level multicast addresses depend on the device type. The patch adds a call to dev_close() before the bonding master changes type and dev_open() just after that. In the example below I enslaved an IPoIB device (ib0) under bond0. Since each bonding master starts as device of type ARPHRD_ETHER by default, a change of type occurs when ib0 is enslaved. This is how /proc/net/dev_mcast looks like without the patch 5 bond0 1 0 00ffffffff12601bffff000000000001ff96ca05 5 bond0 1 0 01005e000116 5 bond0 1 0 01005e7ffffd 5 bond0 1 0 01005e000001 5 bond0 1 0 333300000001 6 ib0 1 0 00ffffffff12601bffff000000000001ff96ca05 6 ib0 1 0 333300000001 6 ib0 1 0 01005e000001 6 ib0 1 0 01005e7ffffd 6 ib0 1 0 01005e000116 6 ib0 1 0 00ffffffff12401bffff00000000000000000001 6 ib0 1 0 00ffffffff12601bffff00000000000000000001 and this is how it looks like after the patch. 5 bond0 1 0 00ffffffff12601bffff000000000001ff96ca05 5 bond0 1 0 00ffffffff12601bffff00000000000000000001 5 bond0 1 0 00ffffffff12401bffff0000000000000ffffffd 5 bond0 1 0 00ffffffff12401bffff00000000000000000116 5 bond0 1 0 00ffffffff12401bffff00000000000000000001 6 ib0 1 0 00ffffffff12601bffff000000000001ff96ca05 6 ib0 1 0 00ffffffff12401bffff00000000000000000116 6 ib0 1 0 00ffffffff12401bffff0000000000000ffffffd 6 ib0 2 0 00ffffffff12401bffff00000000000000000001 6 ib0 2 0 00ffffffff12601bffff00000000000000000001 Signed-off-by: Moni Shoua <monis@voltaire.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/bonding/bond_main.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index d927f71af8a..aa1be1fecee 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1459,8 +1459,16 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
* ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
*/
if (bond->slave_cnt == 0) {
- if (slave_dev->type != ARPHRD_ETHER)
- bond_setup_by_slave(bond_dev, slave_dev);
+ if (bond_dev->type != slave_dev->type) {
+ dev_close(bond_dev);
+ pr_debug("%s: change device type from %d to %d\n",
+ bond_dev->name, bond_dev->type, slave_dev->type);
+ if (slave_dev->type != ARPHRD_ETHER)
+ bond_setup_by_slave(bond_dev, slave_dev);
+ else
+ ether_setup(bond_dev);
+ dev_open(bond_dev);
+ }
} else if (bond_dev->type != slave_dev->type) {
pr_err(DRV_NAME ": %s ether type (%d) is different "
"from other slaves (%d), can not enslave it.\n",