fib: fib api updates

Enhance the route add/del APIs to take a set of paths rather than just one.
Most unicast routing protocols calcualte all the available paths in one
run of the algorithm so updating all the paths at once is beneficial for the client.
two knobs control the behaviour:
  is_multipath - if set the the set of paths passed will be added to those
                 that already exist, otherwise the set will replace them.
  is_add - add or remove the set

is_add=0, is_multipath=1 and an empty set, results in deleting the route.

It is also considerably faster to add multiple paths at once, than one at a time:

vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.11
100000 routes in .572240 secs, 174751.80 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.12
100000 routes in .528383 secs, 189256.54 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.13
100000 routes in .757131 secs, 132077.52 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.14
100000 routes in .878317 secs, 113854.12 routes/sec

vat# ip_route_add_del 1.1.1.1/32 count 100000 multipath via 10.10.10.11 via 10.10.10.12 via 10.10.10.13 via 10.10.10.14
100000 routes in .900212 secs, 111084.93 routes/sec

Change-Id: I416b93f7684745099c1adb0b33edac58c9339c1a
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Signed-off-by: Ole Troan <ot@cisco.com>
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/extras/vom/vom/api_types.hpp b/extras/vom/vom/api_types.hpp
index 789bbb19401..b026ba38db2 100644
--- a/extras/vom/vom/api_types.hpp
+++ b/extras/vom/vom/api_types.hpp
@@ -22,6 +22,12 @@
 
 namespace VOM {
 
+struct invalid_decode
+{
+  invalid_decode(const std::string reason);
+  const std::string reason;
+};
+
 typedef boost::asio::ip::address ip_address_t;
 
 vapi_enum_ip_neighbor_flags to_api(const neighbour::flags_t& f);
@@ -33,12 +39,15 @@ void to_api(const boost::asio::ip::address_v6& a, vapi_type_ip6_address& v);
 void to_api(const boost::asio::ip::address& a,
             vapi_union_address_union& u,
             vapi_enum_address_family& af);
+void to_api(const boost::asio::ip::address& a, vapi_union_address_union& u);
 
 boost::asio::ip::address_v4 from_api(const vapi_type_ip4_address& v);
 boost::asio::ip::address_v6 from_api(const vapi_type_ip6_address& v);
 ip_address_t from_api(const vapi_type_address& v);
 ip_address_t from_api(const vapi_union_address_union& u,
                       vapi_enum_address_family af);
+ip_address_t from_api(const vapi_union_address_union& u,
+                      vapi_enum_fib_path_nh_proto proto);
 
 void to_api(const mac_address_t& a, vapi_type_mac_address& m);
 
@@ -49,7 +58,11 @@ route::mprefix_t from_api(const vapi_type_mprefix&);
 
 vapi_type_prefix to_api(const route::prefix_t&);
 vapi_type_mprefix to_api(const route::mprefix_t&);
-};
+
+vapi_enum_fib_path_nh_proto to_api(const nh_proto_t&);
+const nh_proto_t& from_api(vapi_enum_fib_path_nh_proto);
+
+}; // VOM
 
 /*
  * fd.io coding-style-patch-verification: ON