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routing: refactor control cmds #1.
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Authored by melifaro on Aug 8 2022, 12:45 PM.
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Details

Summary

This is a pre-requsite to enable nhop-based route operations required
for efficient multipath control plane support & netlink multipath
support.

  • add explicit basic low-level radix operations: add_route() (renamed from add_route_nhop()) delete_route() (factored from change_route_nhop()) change_route() (renamed from change_route_nhop)
  • remove "info" parameter from change_route_conditional() as a part of reducing rt_addrinfo usage in the internal KPIs
  • add lookup_prefix_rt() wrapper for doing re-lookups after RIB lock/unlock

MFC after: 2 weeks

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rG FreeBSD src repository
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