For the 'by-mac', only remove the structure when it is ready for API
view without changing internal view.
For the 'by-switch', do the update per switch and after it's done.
Provide ability to check scan status through reading
/networking/macs/rescan
In various scenarios, too many macs on a port can be a sign of trouble.
For example, a chained SMM configuration with head on switch port, or
incorrectly pointing a nodes net attributes at a switch uplink port, or
defining SMMs without any nodes, causing XCCs to think they are
rackmount. This sets some sanity value for avoiding problems. This is
of course a mitigation, invalid scenarios could still run afoul of the
limits, but it should catch a large chunk of offending scenarios.
In the common case, we were falling through the bottom
without an explicit return. Restructure things to both
explicitly return and look a bit more sane.
This brings things right to the level of xCAT in
terms of underlying capability. mac addresses have both
an all inclusive list of ports it is found on, and any nodes
that it matches. It goes another step further by logging errors
when ambiguity is detected (either verbatim config conflict or
ambiguous result based on 'namesmatch' and the switch config).
One, include a number of 'fellow' mac addresses on the same port.
Another, allow a mac to appear on multiple ports and have that
reflected in the data structure. Also capture errors to trace
log rather than hanging up on unexpected cases.
Wire up the singleton switch search function to a function that
extracts list of switches and relevant auth data from the config
engine. Add attributes to allow indication by hardware management
port connection. The OS nics will be added later for in-band discovery,
but that's of limited value until PXE support anyway.
This time, the update function is a generator that yields as a sign to caller
that the mac map has had at least a partial update to be considered.
Refactor the snmputil to be object oriented to simplify upstream code. Implement
a method to generate a mac address to ifName/ifDescr for a given switch.
