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authorJay Vosburgh <fubar@us.ibm.com>2008-05-17 21:10:13 -0700
committerJeff Garzik <jgarzik@redhat.com>2008-05-22 06:34:28 -0400
commitb2220cad583c9b63e085476df448fa2aff5ea906 (patch)
tree73d2322a9e5edd2ef7f2e97f523162b57f3e8ebb /Documentation
parent7893b2491a2d5f716540ac5643d78d37a7f6628b (diff)
bonding: refactor ARP active-backup monitor
Refactor ARP monitor for active-backup mode. The motivation for this is to take care of locking issues in a clear manner (particularly to correctly handle RTNL vs. the bonding locks). Currently, the a-b ARP monitor does not hold RTNL at all, but future changes will require RTNL during ARP monitor failovers. Rather than using conditional locking, this patch instead breaks up the ARP monitor into three discrete steps: inspection, commit changes, and probe. The inspection phase marks slaves that require link state changes. The commit phase is only called if inspection detects that changes are needed, and is called with RTNL. Lastly, the probe phase issues the ARP probes that the inspection phase uses to determine link state. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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