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facebook / fboss

Facebook Open Switching System Software for controlling network switches.
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Netlink manager #40

Closed rizard closed 6 years ago

rizard commented 8 years ago

Add tap interfaces to switch host OS. There is a 1:1 mapping between a tap interface and an FBOSS Interface. Use netlink to monitor these tap interfaces for state changes, such as add/del/mod IPv4, IPv6, MAC addresses, MTU, ARP and NDP entries, and routes. Upon an observed change, notify FBOSS of the event. For example, if an IPv4 address is added to a tap interface, say tap01, FBOSS's corresponding Interface will be updated with the IP address. This and other updates received by the netlink manager are applied as a state change through the SwSwitch.

Notes: -- The netlink manger and the existing TunManager are mutually exclusive -- Limitation of one tap interface per VLAN at present -- Work in progress (95% complete as of 03/29/16)

Changes to FBOSS: -- Addition of libnl3 libraries -- New GFLAGS for toggling b/t netlink and FBOSS managed modes -- Addition of new NetlinkListener (soon to be renamed NetlinkManager) -- Incorporation of netlink code into SwSwitch -- Addition of L2 packet handling/forwarding to/from tap interfaces in SwSwitch -- Minor changes to IPv4Handler, IPv6Handler, and ArpHandler for punting packets to CPU if in netlink managed mode -- Modification of switch state types (e.g. state/Interface) for ease of performing state updates -- Modification of BCM OpenNSL code to allow for interface updates outside of a warm boot scenario

capveg commented 6 years ago

I'm closing this out as all of this logic has been ported into the netlink_manager code as a external daemon. Thanks for the contribution! I definition accelerated us in our development!