From: Or Gerlitz Date: Sat, 14 Jun 2008 01:12:02 +0000 (-0700) Subject: bonding: deliver netdev event for fail-over under the active-backup mode X-Git-Tag: v2.6.27-rc1~964^2~290^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=01f3109de49a889db8adf9116449727547ee497e;p=platform%2Fkernel%2Flinux-stable.git bonding: deliver netdev event for fail-over under the active-backup mode under active-backup mode and when there's actual new_active slave, have bond_change_active_slave() call the networking core to deliver NETDEV_BONDING_FAILOVER event such that the fail-over can be notable by code outside of the bonding driver such as the RDMA stack and monitoring tools. As the correct context of locking appropriate for notifier calls is RTNL and nothing else, bond->curr_slave_lock and bond->lock are unlocked and later locked again. This is ensured by the rest of the code to be safe under backup-mode AND when new_active is not NULL. Jay Vosburgh modified the original patch for formatting and fixed a compiler error. Signed-off-by: Or Gerlitz Signed-off-by: Jay Vosburgh Signed-off-by: Jeff Garzik --- diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 2db2d05..925402bcd 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1203,6 +1203,14 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active) dprintk("delaying gratuitous arp on %s\n", bond->curr_active_slave->dev->name); } + + write_unlock_bh(&bond->curr_slave_lock); + read_unlock(&bond->lock); + + netdev_bonding_change(bond->dev); + + read_lock(&bond->lock); + write_lock_bh(&bond->curr_slave_lock); } } }