diff options
| author | Jay Vosburgh <fubar@us.ibm.com> | 2008-01-17 16:24:59 -0800 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-01-18 14:38:38 -0500 |
| commit | 2543331d367c9fe54f4ba73300894bc21e0a08f4 (patch) | |
| tree | 83c43c448b7f18541dbe70ca4ff80138f8e695d4 /drivers/net/bonding/bond_main.c | |
| parent | e0138a66e18c6755ee29ce13b3f1142af775dc5f (diff) | |
| download | blackbird-op-linux-2543331d367c9fe54f4ba73300894bc21e0a08f4.tar.gz blackbird-op-linux-2543331d367c9fe54f4ba73300894bc21e0a08f4.zip | |
bonding: fix locking during alb failover and slave removal
alb_fasten_mac_swap (actually rlb_teach_disabled_mac_on_primary)
requries RTNL and no other locks. This could cause dev_set_promiscuity
and/or dev_set_mac_address to be called with improper locking.
Changed callers to hold only RTNL during calls to alb_fasten_mac_swap
or functions calling it. Updated header comments in affected functions to
reflect proper reality of locking requirements.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/bonding/bond_main.c')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index b0b26036266b..77d004d3c554 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1746,7 +1746,9 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) * has been cleared (if our_slave == old_current), * but before a new active slave is selected. */ + write_unlock_bh(&bond->lock); bond_alb_deinit_slave(bond, slave); + write_lock_bh(&bond->lock); } if (oldcurrent == slave) { @@ -1905,6 +1907,12 @@ static int bond_release_all(struct net_device *bond_dev) slave_dev = slave->dev; bond_detach_slave(bond, slave); + /* now that the slave is detached, unlock and perform + * all the undo steps that should not be called from + * within a lock. + */ + write_unlock_bh(&bond->lock); + if ((bond->params.mode == BOND_MODE_TLB) || (bond->params.mode == BOND_MODE_ALB)) { /* must be called only after the slave @@ -1915,12 +1923,6 @@ static int bond_release_all(struct net_device *bond_dev) bond_compute_features(bond); - /* now that the slave is detached, unlock and perform - * all the undo steps that should not be called from - * within a lock. - */ - write_unlock_bh(&bond->lock); - bond_destroy_slave_symlinks(bond_dev, slave_dev); bond_del_vlans_from_slave(bond, slave_dev); |
