This patch moves miimon logic from the bond module to netdev-linux.
This greatly simplifies the bonding code while adding minimal
complexity to netdev-linux. The bonding code is so high level, it
really has no business worrying about how precisely slave status is
determined.
The bonding code only needs to know whether a given slave may be
enabled, and whether LACP has been negotiated on the bond. Instead
of passing in the LACP handle and letting the bond query this
information. This patch passes in the information directly.
For BM_STABLE bonds, instead of choosing the sort key in the
qsort() comparator, this patch makes it a configuration setting of
each slave. This will help wrest LACP out of the bonding code
further in future patches.
Before this patch, the bonding code had taken over responsibility
for running the LACP module. However, the bonding code only needs
the LACP module for some basic status queries. LACP and bonding
are actually logically parallel modules and do not really have a
parent child relationship. Furthermore, we need to be able to run
LACP on non-bonded interfaces which the existing approach
prevented. This patch gives control of the LACP module back to the
bridge.
Changes in the bonding mode can cause drastic changes in flow
assignments to slaves. This commit causes all flows in a bridge
to be revalidated when bond_reconfigure() changes its bonding mode.
This approach is a bit aggressive, but bond reconfiguration
shouldn't happen often.
This removes over 1000 lines of code from bridge.c and will make it
easier to moving the bonding implementation into ofproto as part of
future development.
