diff options
| author | Jay Vosburgh <fubar@us.ibm.com> | 2008-01-29 18:07:44 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-03 04:28:12 -0800 |
| commit | 80ee5ad23150f1f3fe8d35728e860850ccea44da (patch) | |
| tree | 4bab44a6762a87c59ba22ab688326f1a6fe075a1 /drivers/net/bonding | |
| parent | a42e534f1b6be7f2f68f83d29588c3f2736b4d25 (diff) | |
bonding: fix set_multicast_list locking
This patch eliminates a problem (reported by lockdep) in the
bond_set_multicast_list function. It first reduces the locking on
bond->lock to a simple read_lock, and second, adds netif_tx locking
around the bonding mc_list manipulations that occur outside of the
set_multicast_list function.
The original problem was related to IPv6 addrconf activity.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bonding')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 2766855a5aee..65c7ebafaacd 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1464,10 +1464,12 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) dev_set_allmulti(slave_dev, 1); } + netif_tx_lock_bh(bond_dev); /* upload master's mc_list to new slave */ for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); } + netif_tx_unlock_bh(bond_dev); } if (bond->params.mode == BOND_MODE_8023AD) { @@ -1821,7 +1823,9 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) } /* flush master's mc_list from slave */ + netif_tx_lock_bh(bond_dev); bond_mc_list_flush(bond_dev, slave_dev); + netif_tx_unlock_bh(bond_dev); } netdev_set_master(slave_dev, NULL); @@ -1942,7 +1946,9 @@ static int bond_release_all(struct net_device *bond_dev) } /* flush master's mc_list from slave */ + netif_tx_lock_bh(bond_dev); bond_mc_list_flush(bond_dev, slave_dev); + netif_tx_unlock_bh(bond_dev); } netdev_set_master(slave_dev, NULL); @@ -3937,8 +3943,6 @@ static void bond_set_multicast_list(struct net_device *bond_dev) struct bonding *bond = bond_dev->priv; struct dev_mc_list *dmi; - write_lock_bh(&bond->lock); - /* * Do promisc before checking multicast_mode */ @@ -3959,6 +3963,8 @@ static void bond_set_multicast_list(struct net_device *bond_dev) bond_set_allmulti(bond, -1); } + read_lock(&bond->lock); + bond->flags = bond_dev->flags; /* looking for addresses to add to slaves' mc list */ @@ -3979,7 +3985,7 @@ static void bond_set_multicast_list(struct net_device *bond_dev) bond_mc_list_destroy(bond); bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); - write_unlock_bh(&bond->lock); + read_unlock(&bond->lock); } /* @@ -4526,7 +4532,9 @@ static void bond_free_all(void) struct net_device *bond_dev = bond->dev; bond_work_cancel_all(bond); + netif_tx_lock_bh(bond_dev); bond_mc_list_destroy(bond); + netif_tx_unlock_bh(bond_dev); /* Release the bonded slaves */ bond_release_all(bond_dev); bond_deinit(bond_dev); |