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bonding: handle slave's name change with primary_slave logic 

Currently, if a slave's name change, we just pass it by. However, if the
slave is a current primary_slave, then we end up with using a slave, whose
name != params.primary, for primary_slave. And vice-versa, if we don't have
a primary_slave but have params.primary set - we will not detected a new
primary_slave.

Fix this by catching the NETDEV_CHANGENAME event and setting primary_slave
accordingly. Also, if the primary_slave was changed, issue a reselection of
the active slave, cause the priorities have changed.

Reported-by: Ding Tianhong <dingtianhong@huawei.com>
CC: Ding Tianhong <dingtianhong@huawei.com>
CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2014-01-16 02:04:29 +01:00 committed by David S. Miller
parent 6c80563c2f
commit 3ec775b9fb
1 changed files with 21 additions and 3 deletions
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24
drivers/net/bonding/bond_main.c
View File

@ -2860,9 +2860,27 @@ static int bond_slave_netdev_event(unsigned long event,
*/
break;
case NETDEV_CHANGENAME:
/*
* TODO: handle changing the primary's name
*/
/* we don't care if we don't have primary set */
if (!USES_PRIMARY(bond->params.mode) ||
!bond->params.primary[0])
break;
if (slave == bond->primary_slave) {
/* slave's name changed - he's no longer primary */
bond->primary_slave = NULL;
} else if (!strcmp(slave_dev->name, bond->params.primary)) {
/* we have a new primary slave */
bond->primary_slave = slave;
} else { /* we didn't change primary - exit */
break;
}
pr_info("%s: Primary slave changed to %s, reselecting active slave.\n",
bond->dev->name, bond->primary_slave ? slave_dev->name :
"none");
write_lock_bh(&bond->curr_slave_lock);
bond_select_active_slave(bond);
write_unlock_bh(&bond->curr_slave_lock);
break;
case NETDEV_FEAT_CHANGE:
bond_compute_features(bond);