Preexport: No route modification, no linpool needed

nest/protocol.h

@@ -201,9 +201,10 @@ struct proto {
    *	   make_tmp_attrs  Add attributes to rta from from private attrs stored in rte. The route and rta MUST NOT be cached.
    *	   store_tmp_attrs Store private attrs back to rte and undef added attributes. The route and rta MUST NOT be cached.
    *	   preexport	Called as the first step of the route exporting process.
-   *			It can construct a new rte, add private attributes and
+   *			It can decide whether the route shall be exported:
-   *			decide whether the route shall be exported: 1=yes, -1=no,
+   *			  -1 = reject,
-   *			0=process it through the export filter set by the user.
+   *			   0 = continue to export filter
+   *			   1 = accept immediately
    *	   reload_routes   Request channel to reload all its routes to the core
    *			(using rte_update()). Returns: 0=reload cannot be done,
    *			1= reload is scheduled and will happen (asynchronously).
@@ -217,7 +218,7 @@ struct proto {
   void (*neigh_notify)(struct neighbor *neigh);
   void (*make_tmp_attrs)(struct rte *rt, struct linpool *pool);
   void (*store_tmp_attrs)(struct rte *rt, struct linpool *pool);
-  int (*preexport)(struct proto *, struct rte **rt, struct linpool *pool);
+  int (*preexport)(struct proto *, struct rte *rt);
   void (*reload_routes)(struct channel *);
   void (*feed_begin)(struct channel *, int initial);
   void (*feed_end)(struct channel *);

nest/rt-show.c

@@ -154,7 +154,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
       else if (d->export_mode)
 	{
 	  struct proto *ep = ec->proto;
-	  int ic = ep->preexport ? ep->preexport(ep, &e, c->show_pool) : 0;
+	  int ic = ep->preexport ? ep->preexport(ep, e) : 0;
 
 	  if (ec->ra_mode == RA_OPTIMAL || ec->ra_mode == RA_MERGED)
 	    pass = 1;

nest/rt-table.c

@@ -605,7 +605,7 @@ export_filter_(struct channel *c, rte *rt0, rte **rt_free, linpool *pool, int si
   rt = rt0;
   *rt_free = NULL;
 
-  v = p->preexport ? p->preexport(p, &rt, pool) : 0;
+  v = p->preexport ? p->preexport(p, rt) : 0;
   if (v < 0)
     {
       if (silent)
@@ -1605,7 +1605,7 @@ rt_examine(rtable *t, net_addr *a, struct proto *p, const struct filter *filter)
   rte_update_lock();
 
   /* Rest is stripped down export_filter() */
-  int v = p->preexport ? p->preexport(p, &rt, rte_update_pool) : 0;
+  int v = p->preexport ? p->preexport(p, rt) : 0;
   if (v == RIC_PROCESS)
   {
     rte_make_tmp_attrs(&rt, rte_update_pool, NULL);

proto/babel/babel.c

@@ -2231,10 +2231,9 @@ babel_kick_timer(struct babel_proto *p)
 
 
 static int
-babel_preexport(struct proto *P, struct rte **new, struct linpool *pool UNUSED)
+babel_preexport(struct proto *P, struct rte *new)
 {
-  struct rta *a = (*new)->attrs;
+  struct rta *a = new->attrs;
-
   /* Reject our own unreachable routes */
   if ((a->dest == RTD_UNREACHABLE) && (a->src->proto == P))
     return -1;

proto/bgp/attrs.c

@@ -1661,9 +1661,8 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px)
  */
 
 int
-bgp_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+bgp_preexport(struct proto *P, rte *e)
 {
-  rte *e = *new;
   struct proto *SRC = e->attrs->src->proto;
   struct bgp_proto *p = (struct bgp_proto *) P;
   struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (struct bgp_proto *) SRC : NULL;

proto/bgp/bgp.h

@@ -583,7 +583,7 @@ int bgp_rte_mergable(rte *pri, rte *sec);
 int bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best);
 struct rte *bgp_rte_modify_stale(struct rte *r, struct linpool *pool);
 void bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old);
-int bgp_preexport(struct proto *, struct rte **, struct linpool *);
+int bgp_preexport(struct proto *, struct rte *);
 int bgp_get_attr(const struct eattr *e, byte *buf, int buflen);
 void bgp_get_route_info(struct rte *, byte *buf);
 int bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad);

proto/ospf/ospf.c

@@ -107,7 +107,7 @@
 #include <stdlib.h>
 #include "ospf.h"
 
-static int ospf_preexport(struct proto *P, rte **new, struct linpool *pool);
+static int ospf_preexport(struct proto *P, rte *new);
 static void ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
 static void ospf_store_tmp_attrs(struct rte *rt, struct linpool *pool);
 static void ospf_reload_routes(struct channel *C);
@@ -484,11 +484,10 @@ ospf_disp(timer * timer)
  * import to the filters.
  */
 static int
-ospf_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+ospf_preexport(struct proto *P, rte *e)
 {
   struct ospf_proto *p = (struct ospf_proto *) P;
   struct ospf_area *oa = ospf_main_area(p);
-  rte *e = *new;
 
   /* Reject our own routes */
   if (e->attrs->src->proto == P)

proto/pipe/pipe.c

@@ -98,9 +98,9 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
 }
 
 static int
-pipe_preexport(struct proto *P, rte **ee, struct linpool *p UNUSED)
+pipe_preexport(struct proto *P, rte *e)
 {
-  struct proto *pp = (*ee)->sender->proto;
+  struct proto *pp = e->sender->proto;
 
   if (pp == P)
     return -1;	/* Avoid local loops automatically */

proto/radv/radv.c

@@ -391,12 +391,12 @@ radv_net_match_trigger(struct radv_config *cf, net *n)
 }
 
 int
-radv_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+radv_preexport(struct proto *P, rte *new)
 {
   // struct radv_proto *p = (struct radv_proto *) P;
   struct radv_config *cf = (struct radv_config *) (P->cf);
 
-  if (radv_net_match_trigger(cf, (*new)->net))
+  if (radv_net_match_trigger(cf, new->net))
     return RIC_PROCESS;
 
   if (cf->propagate_routes)

sysdep/unix/krt.c

@@ -903,11 +903,9 @@ krt_store_tmp_attrs(struct rte *rt, struct linpool *pool)
 }
 
 static int
-krt_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+krt_preexport(struct proto *P, rte *e)
 {
   // struct krt_proto *p = (struct krt_proto *) P;
-  rte *e = *new;
-
   if (e->attrs->src->proto == P)
     return -1;