[PATCH v4 net-next 0/5] net: More movement to fib_nh_common

[David Ahern <dsahern@kernel.org>]

From: David Ahern <dsahern@gmail.com>

Second set of three with the end goal of enabling IPv6 gateways with IPv4
routes.

This set moves:
- the ipv4 tracepoint to take a fib_nh_common and updates it to handle
  a v6 gateway.
- consolidates route notifications to use the same fill functions
  for both ipv4 and ipv6

v4
- enhanced the commit message for patches 1 and 2

v3
- comments from Martin:
  + renamed FIB_RES_NH to FIB_RES_NHC
  + removed family check from fib_result_prefsrc
  + in fib_nexthop_info, renamed nexthop arg to nhc and dropped for_ipv4 arg

v2
- dropped patches moving cached routes and exception buckets to
  fib_nh_common. The goal is allowing a fib6_nh to be used with an
  IPv4 route. The hold up is the need for separate exception buckets -
  one for v6 routes and one for v4 routes. When all of the nexthop patches
  are in, adding a secondi exception bucket pushes IPv6 fib6_info
  allocations over 256 which means fib6_info allocations roll up to 512.
  Hence, deferring the patches until some data mining can be done to keep
  the allocations at 256.

David Ahern (5):
  ipv4: Update fib_table_lookup tracepoint to take common nexthop
  ipv4: Add fib_nh_common to fib_result
  ipv4: Refactor nexthop attributes in fib_dump_info
  ipv4: Change fib_nexthop_info and fib_add_nexthop to take
    fib_nh_common
  ipv6: Flip to fib_nexthop_info

 include/net/ip_fib.h       |  52 +++++------
 include/trace/events/fib.h |  45 ++++++----
 net/core/filter.c          |  12 +--
 net/ipv4/fib_frontend.c    |   6 +-
 net/ipv4/fib_lookup.h      |   1 +
 net/ipv4/fib_semantics.c   | 215 ++++++++++++++++++++++++++++++++-------------
 net/ipv4/fib_trie.c        |  13 +--
 net/ipv4/route.c           |  60 ++++++++-----
 net/ipv6/route.c           |  77 ++--------------
 9 files changed, 267 insertions(+), 214 deletions(-)

-- 
2.11.0