From d471d5fc7ce587ed836ca7fa10a79331bc181d45 Mon Sep 17 00:00:00 2001
From: Maria Matejka <mq@ucw.cz>
Date: Sat, 20 Mar 2021 23:18:34 +0100
Subject: IGP metric getter refactoring to protocol callback

Direct protocol hooks for IGP metric inside nest/rt-table.c make the
protocol API unnecessarily complex. Instead, we use a proper callback.
---
 nest/rt-table.c | 36 ++++--------------------------------
 1 file changed, 4 insertions(+), 32 deletions(-)

(limited to 'nest/rt-table.c')

diff --git a/nest/rt-table.c b/nest/rt-table.c
index a869bb18..844c7a68 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -45,10 +45,6 @@
 #include "lib/string.h"
 #include "lib/alloca.h"
 
-#ifdef CONFIG_BGP
-#include "proto/bgp/bgp.h"
-#endif
-
 pool *rt_table_pool;
 
 static slab *rte_slab;
@@ -3022,36 +3018,12 @@ rt_get_igp_metric(rte *rt)
   if (ea)
     return ea->u.data;
 
-  rta *a = rt->attrs;
-
-#ifdef CONFIG_OSPF
-  if ((a->source == RTS_OSPF) ||
-      (a->source == RTS_OSPF_IA) ||
-      (a->source == RTS_OSPF_EXT1))
-    return rt->u.ospf.metric1;
-#endif
-
-#ifdef CONFIG_RIP
-  if (a->source == RTS_RIP)
-    return rt->u.rip.metric;
-#endif
-
-#ifdef CONFIG_BGP
-  if (a->source == RTS_BGP)
-  {
-    u64 metric = bgp_total_aigp_metric(rt);
-    return (u32) MIN(metric, (u64) IGP_METRIC_UNKNOWN);
-  }
-#endif
-
-#ifdef CONFIG_BABEL
-  if (a->source == RTS_BABEL)
-    return rt->u.babel.metric;
-#endif
-
-  if (a->source == RTS_DEVICE)
+  if (rt->attrs->source == RTS_DEVICE)
     return 0;
 
+  if (rt->src->proto->rte_igp_metric)
+    return rt->src->proto->rte_igp_metric(rt);
+
   return IGP_METRIC_UNKNOWN;
 }
 
-- 
cgit v1.2.3


From 3660f19dd534224da4870a507efcef5b36794506 Mon Sep 17 00:00:00 2001
From: Maria Matejka <mq@ucw.cz>
Date: Mon, 17 Feb 2020 11:18:32 +0100
Subject: Dropping the RTS_DUMMY temporary route storage.

Kernel route sync is done by other ways now and this code is not used
currently.
---
 doc/bird.sgml          |  2 +-
 filter/test.conf       |  1 -
 nest/config.Y          |  2 +-
 nest/route.h           |  1 -
 nest/rt-attr.c         |  3 +--
 nest/rt-table.c        | 23 -----------------------
 proto/ospf/rt.c        |  6 +++---
 sysdep/linux/netlink.c |  2 --
 8 files changed, 6 insertions(+), 34 deletions(-)

(limited to 'nest/rt-table.c')

diff --git a/doc/bird.sgml b/doc/bird.sgml
index ddad4d98..a2138b55 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1691,7 +1691,7 @@ Common route attributes are:
 
 	<tag><label id="rta-source"><m/enum/ source</tag>
 	what protocol has told me about this route. Possible values:
-	<cf/RTS_DUMMY/, <cf/RTS_STATIC/, <cf/RTS_INHERIT/, <cf/RTS_DEVICE/,
+	<cf/RTS_STATIC/, <cf/RTS_INHERIT/, <cf/RTS_DEVICE/,
 	<cf/RTS_RIP/, <cf/RTS_OSPF/, <cf/RTS_OSPF_IA/, <cf/RTS_OSPF_EXT1/,
 	<cf/RTS_OSPF_EXT2/, <cf/RTS_BGP/, <cf/RTS_PIPE/, <cf/RTS_BABEL/.
 
diff --git a/filter/test.conf b/filter/test.conf
index 3a8804a1..93e7a770 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -378,7 +378,6 @@ bt_test_suite(t_ip_set, "Testing sets of ip address");
 
 function t_enum()
 {
-	bt_assert(format(RTS_DUMMY)  = "(enum 30)0");
 	bt_assert(format(RTS_STATIC) = "(enum 30)1");
 	bt_assert(format(NET_IP4) = "(enum 36)1");
 	bt_assert(format(NET_VPN6) = "(enum 36)4");
diff --git a/nest/config.Y b/nest/config.Y
index 7ead8589..ef3e27c0 100644
--- a/nest/config.Y
+++ b/nest/config.Y
@@ -128,7 +128,7 @@ CF_KEYWORDS(CHECK, LINK)
 /* For r_args_channel */
 CF_KEYWORDS(IPV4, IPV4_MC, IPV4_MPLS, IPV6, IPV6_MC, IPV6_MPLS, IPV6_SADR, VPN4, VPN4_MC, VPN4_MPLS, VPN6, VPN6_MC, VPN6_MPLS, ROA4, ROA6, FLOW4, FLOW6, MPLS, PRI, SEC)
 
-CF_ENUM(T_ENUM_RTS, RTS_, DUMMY, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIRECT,
+CF_ENUM(T_ENUM_RTS, RTS_, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIRECT,
 	RIP, OSPF, OSPF_IA, OSPF_EXT1, OSPF_EXT2, BGP, PIPE, BABEL)
 CF_ENUM(T_ENUM_SCOPE, SCOPE_, HOST, LINK, SITE, ORGANIZATION, UNIVERSE, UNDEFINED)
 CF_ENUM(T_ENUM_RTD, RTD_, UNICAST, BLACKHOLE, UNREACHABLE, PROHIBIT)
diff --git a/nest/route.h b/nest/route.h
index 531a4ca8..9dc6a6bd 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -432,7 +432,6 @@ typedef struct rta {
   struct nexthop nh;			/* Next hop */
 } rta;
 
-#define RTS_DUMMY 0			/* Dummy route to be removed soon */
 #define RTS_STATIC 1			/* Normal static route */
 #define RTS_INHERIT 2			/* Route inherited from kernel */
 #define RTS_DEVICE 3			/* Device route */
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 00744bea..1bece201 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -61,7 +61,6 @@
 const adata null_adata;		/* adata of length 0 */
 
 const char * const rta_src_names[RTS_MAX] = {
-  [RTS_DUMMY]		= "",
   [RTS_STATIC]		= "static",
   [RTS_INHERIT]		= "inherit",
   [RTS_DEVICE]		= "device",
@@ -1260,7 +1259,7 @@ rta_do_cow(rta *o, linpool *lp)
 void
 rta_dump(rta *a)
 {
-  static char *rts[] = { "RTS_DUMMY", "RTS_STATIC", "RTS_INHERIT", "RTS_DEVICE",
+  static char *rts[] = { "", "RTS_STATIC", "RTS_INHERIT", "RTS_DEVICE",
 			 "RTS_STAT_DEV", "RTS_REDIR", "RTS_RIP",
 			 "RTS_OSPF", "RTS_OSPF_IA", "RTS_OSPF_EXT1",
 			 "RTS_OSPF_EXT2", "RTS_BGP", "RTS_PIPE", "RTS_BABEL" };
diff --git a/nest/rt-table.c b/nest/rt-table.c
index 844c7a68..13af3eaf 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -1385,26 +1385,6 @@ rte_update_unlock(void)
     lp_flush(rte_update_pool);
 }
 
-static inline void
-rte_hide_dummy_routes(net *net, rte **dummy)
-{
-  if (net->routes && net->routes->attrs->source == RTS_DUMMY)
-  {
-    *dummy = net->routes;
-    net->routes = (*dummy)->next;
-  }
-}
-
-static inline void
-rte_unhide_dummy_routes(net *net, rte **dummy)
-{
-  if (*dummy)
-  {
-    (*dummy)->next = net->routes;
-    net->routes = *dummy;
-  }
-}
-
 /**
  * rte_update - enter a new update to a routing table
  * @table: table to be updated
@@ -1453,7 +1433,6 @@ rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
   // struct proto *p = c->proto;
   struct proto_stats *stats = &c->stats;
   const struct filter *filter = c->in_filter;
-  rte *dummy = NULL;
   net *nn;
 
   ASSERT(c->channel_state == CS_UP);
@@ -1532,9 +1511,7 @@ rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
 
  recalc:
   /* And recalculate the best route */
-  rte_hide_dummy_routes(nn, &dummy);
   rte_recalculate(c, nn, new, src);
-  rte_unhide_dummy_routes(nn, &dummy);
 
   rte_update_unlock();
   return;
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 91d16dd9..471bb586 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -144,7 +144,7 @@ orta_compare(const struct ospf_proto *p, const orta *new, const orta *old)
 {
   int r;
 
-  if (old->type == RTS_DUMMY)
+  if (!old->type)
     return 1;
 
   /* Prefer intra-area to inter-area to externals */
@@ -195,7 +195,7 @@ orta_compare_asbr(const struct ospf_proto *p, const orta *new, const orta *old)
 {
   int r;
 
-  if (old->type == RTS_DUMMY)
+  if (!old->type)
     return 1;
 
   if (!p->rfc1583)
@@ -225,7 +225,7 @@ orta_compare_ext(const struct ospf_proto *p, const orta *new, const orta *old)
 {
   int r;
 
-  if (old->type == RTS_DUMMY)
+  if (!old->type)
     return 1;
 
   /* 16.4 (6a) - prefer routes with lower type */
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index ac092871..b8619441 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1305,8 +1305,6 @@ nl_send_route(struct krt_proto *p, rte *e, int op, int dest, struct nexthop *nh)
 
   if (p->af == AF_MPLS)
     priority = 0;
-  else if (a->source == RTS_DUMMY)
-    priority = e->u.krt.metric;
   else if (KRT_CF->sys.metric)
     priority = KRT_CF->sys.metric;
   else if ((op != NL_OP_DELETE) && (ea = ea_find(eattrs, EA_KRT_METRIC)))
-- 
cgit v1.2.3