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  1. May 23, 2018
    • David Ahern's avatar
      net/ipv6: Simplify route replace and appending into multipath route · f34436a4
      David Ahern authored
      
      
      Bring consistency to ipv6 route replace and append semantics.
      
      Remove rt6_qualify_for_ecmp which is just guess work. It fails in 2 cases:
      1. can not replace a route with a reject route. Existing code appends
         a new route instead of replacing the existing one.
      
      2. can not have a multipath route where a leg uses a dev only nexthop
      
      Existing use cases affected by this change:
      1. adding a route with existing prefix and metric using NLM_F_CREATE
         without NLM_F_APPEND or NLM_F_EXCL (ie., what iproute2 calls
         'prepend'). Existing code auto-determines that the new nexthop can
         be appended to an existing route to create a multipath route. This
         change breaks that by requiring the APPEND flag for the new route
         to be added to an existing one. Instead the prepend just adds another
         route entry.
      
      2. route replace. Existing code replaces first matching multipath route
         if new route is multipath capable and fallback to first matching
         non-ECMP route (reject or dev only route) in case one isn't available.
         New behavior replaces first matching route. (Thanks to Ido for spotting
         this one)
      
      Note: Newer iproute2 is needed to display multipath routes with a dev-only
            nexthop. This is due to a bug in iproute2 and parsing nexthops.
      
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f34436a4
    • David Ahern's avatar
      mlxsw: spectrum_router: Add support for route append · 5a15a1b0
      David Ahern authored
      
      
      Handle append for gateway based routes. Dev-only multipath routes will
      be handled by a follow on patch.
      
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5a15a1b0
  2. May 22, 2018
  3. May 21, 2018