From 13c0be19d3d2acc9c1636bbab9222aabdf27d7ac Mon Sep 17 00:00:00 2001
From: Jan Maria Matejka <mq@ucw.cz>
Date: Tue, 29 May 2018 12:08:12 +0200
Subject: [PATCH] Nest: Removing separate tmpa from route propagation

This is a fundamental change of an original (1999) concept of route
processing inside BIRD. During import/export, there was a temporary
ea_list created which was to be used instead of the another one inside
the route itself.

This led to some confusion, quirks, and strange filter code that handled
extended route attributes. Dropping it now.

The protocol interface has changed in an uniform way -- the
`struct ea_list *attrs` argument has been removed from store_tmp_attrs(),
import_control(), rt_notify() and get_route_info().
---
 filter/filter.c        | 64 ++++++++++++----------------
 filter/filter.h        |  3 +-
 nest/protocol.h        | 24 ++++++-----
 nest/route.h           | 13 +++++-
 nest/rt-attr.c         | 60 +++++++++++++++-----------
 nest/rt-show.c         | 34 ++++++---------
 nest/rt-table.c        | 97 +++++++++++++++++-------------------------
 proto/babel/babel.c    | 17 ++++----
 proto/babel/config.Y   |  2 +-
 proto/bgp/attrs.c      | 12 +++---
 proto/bgp/bgp.h        |  6 +--
 proto/ospf/config.Y    |  8 ++--
 proto/ospf/ospf.c      | 18 ++++----
 proto/ospf/topology.c  |  3 +-
 proto/ospf/topology.h  |  2 +-
 proto/pipe/pipe.c      |  5 +--
 proto/radv/radv.c      |  8 ++--
 proto/rip/config.Y     |  4 +-
 proto/rip/rip.c        | 15 +++----
 sysdep/bsd/krt-sock.c  |  3 +-
 sysdep/linux/netlink.c | 21 ++++-----
 sysdep/unix/krt.Y      |  4 +-
 sysdep/unix/krt.c      | 37 +++++++---------
 sysdep/unix/krt.h      |  2 +-
 24 files changed, 220 insertions(+), 242 deletions(-)

diff --git a/filter/filter.c b/filter/filter.c
index 6381550e..6290e74a 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -538,14 +538,23 @@ val_format(struct f_val v, buffer *buf)
 
 static struct rte **f_rte;
 static struct rta *f_old_rta;
-static struct ea_list **f_tmp_attrs;
+static struct ea_list **f_eattrs;
 static struct linpool *f_pool;
 static struct buffer f_buf;
 static int f_flags;
 
+static inline void f_cache_eattrs(void)
+{
+  f_eattrs = &((*f_rte)->attrs->eattrs);
+}
+
 static inline void f_rte_cow(void)
 {
-  *f_rte = rte_cow(*f_rte);
+  if (!((*f_rte)->flags & REF_COW))
+    return;
+
+  *f_rte = rte_do_cow(*f_rte);
+  f_eattrs = NULL;
 }
 
 /*
@@ -570,6 +579,9 @@ f_rta_cow(void)
    * suppose hostentry is not changed by filters).
    */
   (*f_rte)->attrs = rta_do_cow((*f_rte)->attrs, f_pool);
+
+  /* Re-cache the ea_list */
+  f_cache_eattrs();
 }
 
 static char *
@@ -603,7 +615,10 @@ static struct tbf rl_runtime_err = TBF_DEFAULT_LOG_LIMITS;
       return val;
 
 #define ACCESS_RTE \
-  do { if (!f_rte) runtime("No route to access"); } while (0)
+  do { if (!f_rte) runtime("No route to access"); else f_cache_eattrs(); } while (0)
+
+#define ACCESS_EATTRS \
+  do { if (!f_eattrs) f_cache_eattrs(); } while (0)
 
 #define BITFIELD_MASK(what) \
   (1u << (what->a2.i >> 24))
@@ -995,17 +1010,11 @@ interpret(struct f_inst *what)
     break;
   case FI_EA_GET:	/* Access to extended attributes */
     ACCESS_RTE;
+    ACCESS_EATTRS;
     {
-      eattr *e = NULL;
       u16 code = what->a2.i;
       int f_type = what->aux >> 8;
-
-      if (!(f_flags & FF_FORCE_TMPATTR))
-	e = ea_find((*f_rte)->attrs->eattrs, code);
-      if (!e)
-	e = ea_find((*f_tmp_attrs), code);
-      if ((!e) && (f_flags & FF_FORCE_TMPATTR))
-	e = ea_find((*f_rte)->attrs->eattrs, code);
+      eattr *e = ea_find(*f_eattrs, code);
 
       if (!e) {
 	/* A special case: undefined as_path looks like empty as_path */
@@ -1089,6 +1098,7 @@ interpret(struct f_inst *what)
     break;
   case FI_EA_SET:
     ACCESS_RTE;
+    ACCESS_EATTRS;
     ARG_ANY(1);
     {
       struct ea_list *l = lp_alloc(f_pool, sizeof(struct ea_list) + sizeof(eattr));
@@ -1143,13 +1153,7 @@ interpret(struct f_inst *what)
 	  runtime( "Setting bit in bitfield attribute to non-bool value" );
 	{
 	  /* First, we have to find the old value */
-	  eattr *e = NULL;
-	  if (!(f_flags & FF_FORCE_TMPATTR))
-	    e = ea_find((*f_rte)->attrs->eattrs, code);
-	  if (!e)
-	    e = ea_find((*f_tmp_attrs), code);
-	  if ((!e) && (f_flags & FF_FORCE_TMPATTR))
-	    e = ea_find((*f_rte)->attrs->eattrs, code);
+	  eattr *e = ea_find(*f_eattrs, code);
 	  u32 data = e ? e->u.data : 0;
 
 	  if (v1.val.i)
@@ -1181,14 +1185,9 @@ interpret(struct f_inst *what)
       default: bug("Unknown type in e,S");
       }
 
-      if (!(what->aux & EAF_TEMP) && (!(f_flags & FF_FORCE_TMPATTR))) {
-	f_rta_cow();
-	l->next = (*f_rte)->attrs->eattrs;
-	(*f_rte)->attrs->eattrs = l;
-      } else {
-	l->next = (*f_tmp_attrs);
-	(*f_tmp_attrs) = l;
-      }
+      f_rta_cow();
+      l->next = *f_eattrs;
+      *f_eattrs = l;
     }
     break;
   case FI_PREF_GET:
@@ -1518,11 +1517,12 @@ interpret(struct f_inst *what)
     else
     {
       ACCESS_RTE;
+      ACCESS_EATTRS;
       v1.val.net = (*f_rte)->net->n.addr;
 
       /* We ignore temporary attributes, probably not a problem here */
       /* 0x02 is a value of BA_AS_PATH, we don't want to include BGP headers */
-      eattr *e = ea_find((*f_rte)->attrs->eattrs, EA_CODE(PROTOCOL_BGP, 0x02));
+      eattr *e = ea_find(*f_eattrs, EA_CODE(PROTOCOL_BGP, 0x02));
 
       if (!e || e->type != EAF_TYPE_AS_PATH)
 	runtime("Missing AS_PATH attribute");
@@ -1720,7 +1720,6 @@ i_same(struct f_inst *f1, struct f_inst *f2)
  * f_run - run a filter for a route
  * @filter: filter to run
  * @rte: route being filtered, may be modified
- * @tmp_attrs: temporary attributes, prepared by caller or generated by f_run()
  * @tmp_pool: all filter allocations go from this pool
  * @flags: flags
  *
@@ -1742,7 +1741,7 @@ i_same(struct f_inst *f1, struct f_inst *f2)
  * modified in place, old cached rta is possibly freed.
  */
 int
-f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struct linpool *tmp_pool, int flags)
+f_run(struct filter *filter, struct rte **rte, struct linpool *tmp_pool, int flags)
 {
   if (filter == FILTER_ACCEPT)
     return F_ACCEPT;
@@ -1755,7 +1754,6 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
 
   f_rte = rte;
   f_old_rta = NULL;
-  f_tmp_attrs = tmp_attrs;
   f_pool = tmp_pool;
   f_flags = flags;
 
@@ -1797,11 +1795,9 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
 struct f_val
 f_eval_rte(struct f_inst *expr, struct rte **rte, struct linpool *tmp_pool)
 {
-  struct ea_list *tmp_attrs = NULL;
 
   f_rte = rte;
   f_old_rta = NULL;
-  f_tmp_attrs = &tmp_attrs;
   f_pool = tmp_pool;
   f_flags = 0;
 
@@ -1810,9 +1806,6 @@ f_eval_rte(struct f_inst *expr, struct rte **rte, struct linpool *tmp_pool)
   /* Note that in this function we assume that rte->attrs is private / uncached */
   struct f_val res = interpret(expr);
 
-  /* Hack to include EAF_TEMP attributes to the main list */
-  (*rte)->attrs->eattrs = ea_append(tmp_attrs, (*rte)->attrs->eattrs);
-
   return res;
 }
 
@@ -1820,7 +1813,6 @@ struct f_val
 f_eval(struct f_inst *expr, struct linpool *tmp_pool)
 {
   f_flags = 0;
-  f_tmp_attrs = NULL;
   f_rte = NULL;
   f_pool = tmp_pool;
 
diff --git a/filter/filter.h b/filter/filter.h
index 909d09b1..febfdc65 100644
--- a/filter/filter.h
+++ b/filter/filter.h
@@ -175,7 +175,7 @@ void trie_format(struct f_trie *t, buffer *buf);
 struct ea_list;
 struct rte;
 
-int f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struct linpool *tmp_pool, int flags);
+int f_run(struct filter *filter, struct rte **rte, struct linpool *tmp_pool, int flags);
 struct f_val f_eval_rte(struct f_inst *expr, struct rte **rte, struct linpool *tmp_pool);
 struct f_val f_eval(struct f_inst *expr, struct linpool *tmp_pool);
 uint f_eval_int(struct f_inst *expr);
@@ -285,7 +285,6 @@ struct f_trie
 
 #define NEW_F_VAL struct f_val * val; val = cfg_alloc(sizeof(struct f_val));
 
-#define FF_FORCE_TMPATTR 1		/* Force all attributes to be temporary */
 #define FF_SILENT 2			/* Silent filter execution */
 
 /* Bird Tests */
diff --git a/nest/protocol.h b/nest/protocol.h
index d790e90e..dd942c10 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -77,7 +77,7 @@ struct protocol {
   int (*shutdown)(struct proto *);		/* Stop the instance */
   void (*cleanup)(struct proto *);		/* Called after shutdown when protocol became hungry/down */
   void (*get_status)(struct proto *, byte *buf); /* Get instance status (for `show protocols' command) */
-  void (*get_route_info)(struct rte *, byte *buf, struct ea_list *attrs); /* Get route information (for `show route' command) */
+  void (*get_route_info)(struct rte *, byte *buf); /* Get route information (for `show route' command) */
   int (*get_attr)(struct eattr *, byte *buf, int buflen);	/* ASCIIfy dynamic attribute (returns GA_*) */
   void (*show_proto_info)(struct proto *);	/* Show protocol info (for `show protocols all' command) */
   void (*copy_config)(struct proto_config *, struct proto_config *);	/* Copy config from given protocol instance */
@@ -191,7 +191,7 @@ struct proto {
    *	   rt_notify	Notify protocol about routing table updates.
    *	   neigh_notify	Notify protocol about neighbor cache events.
    *	   make_tmp_attrs  Construct ea_list from private attrs stored in rte.
-   *	   store_tmp_attrs Store private attrs back to the rte.
+   *	   store_tmp_attrs Store private attrs back to rta. The route MUST NOT be cached.
    *	   import_control  Called as the first step of the route importing process.
    *			It can construct a new rte, add private attributes and
    *			decide whether the route shall be imported: 1=yes, -1=no,
@@ -205,11 +205,11 @@ struct proto {
 
   void (*if_notify)(struct proto *, unsigned flags, struct iface *i);
   void (*ifa_notify)(struct proto *, unsigned flags, struct ifa *a);
-  void (*rt_notify)(struct proto *, struct channel *, struct network *net, struct rte *new, struct rte *old, struct ea_list *attrs);
+  void (*rt_notify)(struct proto *, struct channel *, struct network *net, struct rte *new, struct rte *old);
   void (*neigh_notify)(struct neighbor *neigh);
   struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool);
-  void (*store_tmp_attrs)(struct rte *rt, struct ea_list *attrs);
-  int (*import_control)(struct proto *, struct rte **rt, struct ea_list **attrs, struct linpool *pool);
+  void (*store_tmp_attrs)(struct rte *rt);
+  int (*import_control)(struct proto *, struct rte **rt, struct linpool *pool);
   void (*reload_routes)(struct channel *);
   void (*feed_begin)(struct channel *, int initial);
   void (*feed_end)(struct channel *);
@@ -292,12 +292,16 @@ proto_get_router_id(struct proto_config *pc)
   return pc->router_id ? pc->router_id : pc->global->router_id;
 }
 
-static inline struct ea_list *
-rte_make_tmp_attrs(struct rte *rt, struct linpool *pool)
+static inline void
+rte_make_tmp_attrs(struct rte **rt, struct linpool *pool)
 {
   struct ea_list *(*mta)(struct rte *rt, struct linpool *pool);
-  mta = rt->attrs->src->proto->make_tmp_attrs;
-  return mta ? mta(rt, pool) : NULL;
+  mta = (*rt)->attrs->src->proto->make_tmp_attrs;
+  if (!mta) return;
+  *rt = rte_cow_rta(*rt, pool);
+  struct ea_list *ea = mta(*rt, pool);
+  ea->next = (*rt)->attrs->eattrs;
+  (*rt)->attrs->eattrs = ea;
 }
 
 /* Moved from route.h to avoid dependency conflicts */
@@ -466,7 +470,7 @@ struct channel_class {
   void (*dump_attrs)(struct rte *);		/* Dump protocol-dependent attributes */
 
   void (*get_status)(struct proto *, byte *buf); /* Get instance status (for `show protocols' command) */
-  void (*get_route_info)(struct rte *, byte *buf, struct ea_list *attrs); /* Get route information (for `show route' command) */
+  void (*get_route_info)(struct rte *, byte *buf); /* Get route information (for `show route' command) */
   int (*get_attr)(struct eattr *, byte *buf, int buflen);	/* ASCIIfy dynamic attribute (returns GA_*) */
   void (*show_proto_info)(struct proto *);	/* Show protocol info (for `show protocols all' command) */
 
diff --git a/nest/route.h b/nest/route.h
index 1391b357..cad15440 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -294,7 +294,7 @@ rte *rte_get_temp(struct rta *);
 void rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src);
 /* rte_update() moved to protocol.h to avoid dependency conflicts */
 int rt_examine(rtable *t, net_addr *a, struct proto *p, struct filter *filter);
-rte *rt_export_merged(struct channel *c, net *net, rte **rt_free, struct ea_list **tmpa, linpool *pool, int silent);
+rte *rt_export_merged(struct channel *c, net *net, rte **rt_free, linpool *pool, int silent);
 void rt_refresh_begin(rtable *t, struct channel *c);
 void rt_refresh_end(rtable *t, struct channel *c);
 void rt_schedule_prune(rtable *t);
@@ -546,6 +546,15 @@ uint ea_hash(ea_list *e);	/* Calculate 16-bit hash value */
 ea_list *ea_append(ea_list *to, ea_list *what);
 void ea_format_bitfield(struct eattr *a, byte *buf, int bufsize, const char **names, int min, int max);
 
+#define ea_normalize(ea) do { \
+  if (ea->next) { \
+    ea_list *t = alloca(ea_scan(ea)); \
+    ea_merge(ea, t); \
+    ea = t; \
+  } \
+  ea_sort(ea); \
+} while(0) \
+
 static inline eattr *
 ea_set_attr(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, uintptr_t val)
 {
@@ -611,7 +620,7 @@ rta *rta_do_cow(rta *o, linpool *lp);
 static inline rta * rta_cow(rta *r, linpool *lp) { return rta_is_cached(r) ? rta_do_cow(r, lp) : r; }
 void rta_dump(rta *);
 void rta_dump_all(void);
-void rta_show(struct cli *, rta *, ea_list *);
+void rta_show(struct cli *, rta *);
 
 struct hostentry * rt_get_hostentry(rtable *tab, ip_addr a, ip_addr ll, rtable *dep);
 void rta_apply_hostentry(rta *a, struct hostentry *he, mpls_label_stack *mls);
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index f92efc2e..73ca4748 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -550,29 +550,47 @@ ea_do_sort(ea_list *e)
   while (ss);
 }
 
+/**
+ * In place discard duplicates, undefs and temporary attributes in sorted
+ * ea_list. We use stable sort for this reason.
+ **/
 static inline void
 ea_do_prune(ea_list *e)
 {
   eattr *s, *d, *l, *s0;
   int i = 0;
 
-  /* Discard duplicates and undefs. Do you remember sorting was stable? */
-  s = d = e->attrs;
-  l = e->attrs + e->count;
+  s = d = e->attrs;	    /* Beginning of the list. @s is source, @d is destination. */
+  l = e->attrs + e->count;  /* End of the list */
+
+  /* Walk from begin to end. */
   while (s < l)
     {
       s0 = s++;
+      /* Find a consecutive block of the same attribute */
       while (s < l && s->id == s[-1].id)
 	s++;
-      /* s0 is the most recent version, s[-1] the oldest one */
-      if ((s0->type & EAF_TYPE_MASK) != EAF_TYPE_UNDEF)
-	{
-	  *d = *s0;
-	  d->type = (d->type & ~(EAF_ORIGINATED|EAF_FRESH)) | (s[-1].type & EAF_ORIGINATED);
-	  d++;
-	  i++;
-	}
+
+      /* Now s0 is the most recent version, s[-1] the oldest one */
+      /* Drop undefs */
+      if ((s0->type & EAF_TYPE_MASK) == EAF_TYPE_UNDEF)
+	continue;
+
+      /* Drop temporary attributes */
+      if (s0->type & EAF_TEMP)
+	continue;
+
+      /* Copy the newest version to destination */
+      *d = *s0;
+
+      /* Preserve info whether it originated locally */
+      d->type = (d->type & ~(EAF_ORIGINATED|EAF_FRESH)) | (s[-1].type & EAF_ORIGINATED);
+
+      /* Next destination */
+      d++;
+      i++;
     }
+
   e->count = i;
 }
 
@@ -1128,15 +1146,7 @@ rta_lookup(rta *o)
 
   ASSERT(!(o->aflags & RTAF_CACHED));
   if (o->eattrs)
-    {
-      if (o->eattrs->next)	/* Multiple ea_list's, need to merge them */
-	{
-	  ea_list *ml = alloca(ea_scan(o->eattrs));
-	  ea_merge(o->eattrs, ml);
-	  o->eattrs = ml;
-	}
-      ea_sort(o->eattrs);
-    }
+    ea_normalize(o->eattrs);
 
   h = rta_hash(o);
   for(r=rta_hash_table[h & rta_cache_mask]; r; r=r->next)
@@ -1250,17 +1260,15 @@ rta_dump_all(void)
 }
 
 void
-rta_show(struct cli *c, rta *a, ea_list *eal)
+rta_show(struct cli *c, rta *a)
 {
   static char *src_names[] = { "dummy", "static", "inherit", "device", "static-device", "redirect",
 			       "RIP", "OSPF", "OSPF-IA", "OSPF-E1", "OSPF-E2", "BGP", "pipe" };
-  int i;
 
   cli_printf(c, -1008, "\tType: %s %s", src_names[a->source], ip_scope_text(a->scope));
-  if (!eal)
-    eal = a->eattrs;
-  for(; eal; eal=eal->next)
-    for(i=0; i<eal->count; i++)
+
+  for(ea_list *eal = a->eattrs; eal; eal=eal->next)
+    for(int i=0; i<eal->count; i++)
       ea_show(c, &eal->attrs[i]);
 }
 
diff --git a/nest/rt-show.c b/nest/rt-show.c
index 1f1b73d2..90165c57 100644
--- a/nest/rt-show.c
+++ b/nest/rt-show.c
@@ -29,14 +29,14 @@ rt_show_table(struct cli *c, struct rt_show_data *d)
 }
 
 static void
-rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, ea_list *tmpa)
+rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d)
 {
   byte from[IPA_MAX_TEXT_LENGTH+8];
   byte tm[TM_DATETIME_BUFFER_SIZE], info[256];
   rta *a = e->attrs;
   int primary = (e->net->routes == e);
   int sync_error = (e->net->n.flags & KRF_SYNC_ERROR);
-  void (*get_route_info)(struct rte *, byte *buf, struct ea_list *attrs);
+  void (*get_route_info)(struct rte *, byte *buf);
   struct nexthop *nh;
 
   tm_format_time(tm, &config->tf_route, e->lastmod);
@@ -46,17 +46,11 @@ rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, ea_list *tm
     from[0] = 0;
 
   get_route_info = a->src->proto->proto->get_route_info;
-  if (get_route_info || d->verbose)
-    {
-      /* Need to normalize the extended attributes */
-      ea_list *t = tmpa;
-      t = ea_append(t, a->eattrs);
-      tmpa = alloca(ea_scan(t));
-      ea_merge(t, tmpa);
-      ea_sort(tmpa);
-    }
+  /* Need to normalize the extended attributes */
+  if ((get_route_info || d->verbose) && !rta_is_cached(a))
+    ea_normalize(a->eattrs);
   if (get_route_info)
-    get_route_info(e, info, tmpa);
+    get_route_info(e, info);
   else
     bsprintf(info, " (%d)", e->pref);
 
@@ -93,7 +87,7 @@ rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, ea_list *tm
     }
 
   if (d->verbose)
-    rta_show(c, a, tmpa);
+    rta_show(c, a);
 }
 
 static void
@@ -101,7 +95,6 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
 {
   rte *e, *ee;
   byte ia[NET_MAX_TEXT_LENGTH+1];
-  struct ea_list *tmpa;
   struct channel *ec = d->tab->export_channel;
   int first = 1;
   int pass = 0;
@@ -121,7 +114,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
 	continue;
 
       ee = e;
-      tmpa = rte_make_tmp_attrs(e, c->show_pool);
+      rte_make_tmp_attrs(&e, c->show_pool);
 
       /* Export channel is down, do not try to export routes to it */
       if (ec && (ec->export_state == ES_DOWN))
@@ -131,7 +124,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
       if ((d->export_mode == RSEM_EXPORT) && (ec->ra_mode == RA_MERGED))
 	{
 	  rte *rt_free;
-	  e = rt_export_merged(ec, n, &rt_free, &tmpa, c->show_pool, 1);
+	  e = rt_export_merged(ec, n, &rt_free, c->show_pool, 1);
 	  pass = 1;
 
 	  if (!e)
@@ -140,7 +133,7 @@ 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->import_control ? ep->import_control(ep, &e, &tmpa, c->show_pool) : 0;
+	  int ic = ep->import_control ? ep->import_control(ep, &e, c->show_pool) : 0;
 
 	  if (ec->ra_mode == RA_OPTIMAL || ec->ra_mode == RA_MERGED)
 	    pass = 1;
@@ -156,8 +149,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
 	       * command may change the export filter and do not update routes.
 	       */
 	      int do_export = (ic > 0) ||
-		(f_run(ec->out_filter, &e, &tmpa, c->show_pool,
-		       FF_FORCE_TMPATTR | FF_SILENT) <= F_ACCEPT);
+		(f_run(ec->out_filter, &e, c->show_pool, FF_SILENT) <= F_ACCEPT);
 
 	      if (do_export != (d->export_mode == RSEM_EXPORT))
 		goto skip;
@@ -170,11 +162,11 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
       if (d->show_protocol && (d->show_protocol != e->attrs->src->proto))
 	goto skip;
 
-      if (f_run(d->filter, &e, &tmpa, c->show_pool, FF_FORCE_TMPATTR) > F_ACCEPT)
+      if (f_run(d->filter, &e, c->show_pool, 0) > F_ACCEPT)
 	goto skip;
 
       if (d->stats < 2)
-	rt_show_rte(c, ia, e, d, tmpa);
+	rt_show_rte(c, ia, e, d);
 
       d->show_counter++;
       ia[0] = 0;
diff --git a/nest/rt-table.c b/nest/rt-table.c
index b885c6e3..de7b05fc 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -317,11 +317,11 @@ rte_cow_rta(rte *r, linpool *lp)
   if (!rta_is_cached(r->attrs))
     return r;
 
-  rte *e = rte_cow(r);
+  r = rte_cow(r);
   rta *a = rta_do_cow(r->attrs, lp);
-  rta_free(e->attrs);
-  e->attrs = a;
-  return e;
+  rta_free(r->attrs);
+  r->attrs = a;
+  return r;
 }
 
 static int				/* Actually better or at least as good as */
@@ -393,24 +393,20 @@ rte_trace_out(uint flag, struct proto *p, rte *e, char *msg)
 }
 
 static rte *
-export_filter_(struct channel *c, rte *rt0, rte **rt_free, ea_list **tmpa, linpool *pool, int silent)
+export_filter_(struct channel *c, rte *rt0, rte **rt_free, linpool *pool, int silent)
 {
   struct proto *p = c->proto;
   struct filter *filter = c->out_filter;
   struct proto_stats *stats = &c->stats;
-  ea_list *tmpb = NULL;
   rte *rt;
   int v;
 
   rt = rt0;
   *rt_free = NULL;
 
-  if (!tmpa)
-    tmpa = &tmpb;
+  rte_make_tmp_attrs(&rt, pool);
 
-  *tmpa = rte_make_tmp_attrs(rt, pool);
-
-  v = p->import_control ? p->import_control(p, &rt, tmpa, pool) : 0;
+  v = p->import_control ? p->import_control(p, &rt, pool) : 0;
   if (v < 0)
     {
       if (silent)
@@ -429,8 +425,8 @@ export_filter_(struct channel *c, rte *rt0, rte **rt_free, ea_list **tmpa, linpo
     }
 
   v = filter && ((filter == FILTER_REJECT) ||
-		 (f_run(filter, &rt, tmpa, pool,
-			FF_FORCE_TMPATTR | (silent ? FF_SILENT : 0)) > F_ACCEPT));
+		 (f_run(filter, &rt, pool,
+			(silent ? FF_SILENT : 0)) > F_ACCEPT));
   if (v)
     {
       if (silent)
@@ -454,13 +450,13 @@ export_filter_(struct channel *c, rte *rt0, rte **rt_free, ea_list **tmpa, linpo
 }
 
 static inline rte *
-export_filter(struct channel *c, rte *rt0, rte **rt_free, ea_list **tmpa, int silent)
+export_filter(struct channel *c, rte *rt0, rte **rt_free, int silent)
 {
-  return export_filter_(c, rt0, rt_free, tmpa, rte_update_pool, silent);
+  return export_filter_(c, rt0, rt_free, rte_update_pool, silent);
 }
 
 static void
-do_rt_notify(struct channel *c, net *net, rte *new, rte *old, ea_list *tmpa, int refeed)
+do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
 {
   struct proto *p = c->proto;
   struct proto_stats *stats = &c->stats;
@@ -533,19 +529,7 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, ea_list *tmpa, int
       else if (old)
 	rte_trace_out(D_ROUTES, p, old, "removed");
     }
-  if (!new)
-    p->rt_notify(p, c, net, NULL, old, NULL);
-  else if (tmpa)
-    {
-      ea_list *t = tmpa;
-      while (t->next)
-	t = t->next;
-      t->next = new->attrs->eattrs;
-      p->rt_notify(p, c, net, new, old, tmpa);
-      t->next = NULL;
-    }
-  else
-    p->rt_notify(p, c, net, new, old, new->attrs->eattrs);
+  p->rt_notify(p, c, net, new, old);
 }
 
 static void
@@ -557,7 +541,6 @@ rt_notify_basic(struct channel *c, net *net, rte *new0, rte *old0, int refeed)
   rte *old = old0;
   rte *new_free = NULL;
   rte *old_free = NULL;
-  ea_list *tmpa = NULL;
 
   if (new)
     c->stats.exp_updates_received++;
@@ -585,10 +568,10 @@ rt_notify_basic(struct channel *c, net *net, rte *new0, rte *old0, int refeed)
    */
 
   if (new)
-    new = export_filter(c, new, &new_free, &tmpa, 0);
+    new = export_filter(c, new, &new_free, 0);
 
   if (old && !refeed)
-    old = export_filter(c, old, &old_free, NULL, 1);
+    old = export_filter(c, old, &old_free, 1);
 
   if (!new && !old)
   {
@@ -605,13 +588,13 @@ rt_notify_basic(struct channel *c, net *net, rte *new0, rte *old0, int refeed)
 
 #ifdef CONFIG_PIPE
     if ((p->proto == &proto_pipe) && !new0 && (p != old0->sender->proto))
-      p->rt_notify(p, c, net, NULL, old0, NULL);
+      p->rt_notify(p, c, net, NULL, old0);
 #endif
 
     return;
   }
 
-  do_rt_notify(c, net, new, old, tmpa, refeed);
+  do_rt_notify(c, net, new, old, refeed);
 
   /* Discard temporary rte's */
   if (new_free)
@@ -630,7 +613,6 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
   rte *old_best = NULL;
   rte *new_free = NULL;
   rte *old_free = NULL;
-  ea_list *tmpa = NULL;
 
   /* Used to track whether we met old_changed position. If before_old is NULL
      old_changed was the first and we met it implicitly before current best route. */
@@ -648,7 +630,7 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
   /* First, find the new_best route - first accepted by filters */
   for (r=net->routes; rte_is_valid(r); r=r->next)
     {
-      if (new_best = export_filter(c, r, &new_free, &tmpa, 0))
+      if (new_best = export_filter(c, r, &new_free, 0))
 	break;
 
       /* Note if we walked around the position of old_changed route */
@@ -699,7 +681,7 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
 
   /* First case */
   if (old_meet)
-    if (old_best = export_filter(c, old_changed, &old_free, NULL, 1))
+    if (old_best = export_filter(c, old_changed, &old_free, 1))
       goto found;
 
   /* Second case */
@@ -717,18 +699,18 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
   /* Fourth case */
   for (r=r->next; rte_is_valid(r); r=r->next)
     {
-      if (old_best = export_filter(c, r, &old_free, NULL, 1))
+      if (old_best = export_filter(c, r, &old_free, 1))
 	goto found;
 
       if (r == before_old)
-	if (old_best = export_filter(c, old_changed, &old_free, NULL, 1))
+	if (old_best = export_filter(c, old_changed, &old_free, 1))
 	  goto found;
     }
 
   /* Implicitly, old_best is NULL and new_best is non-NULL */
 
  found:
-  do_rt_notify(c, net, new_best, old_best, tmpa, (feed == 2));
+  do_rt_notify(c, net, new_best, old_best, (feed == 2));
 
   /* Discard temporary rte's */
   if (new_free)
@@ -745,7 +727,7 @@ nexthop_merge_rta(struct nexthop *nhs, rta *a, linpool *pool, int max)
 }
 
 rte *
-rt_export_merged(struct channel *c, net *net, rte **rt_free, ea_list **tmpa, linpool *pool, int silent)
+rt_export_merged(struct channel *c, net *net, rte **rt_free, linpool *pool, int silent)
 {
   // struct proto *p = c->proto;
   struct nexthop *nhs = NULL;
@@ -757,7 +739,7 @@ rt_export_merged(struct channel *c, net *net, rte **rt_free, ea_list **tmpa, lin
   if (!rte_is_valid(best0))
     return NULL;
 
-  best = export_filter_(c, best0, rt_free, tmpa, pool, silent);
+  best = export_filter_(c, best0, rt_free, pool, silent);
 
   if (!best || !rte_is_reachable(best))
     return best;
@@ -767,7 +749,7 @@ rt_export_merged(struct channel *c, net *net, rte **rt_free, ea_list **tmpa, lin
     if (!rte_mergable(best0, rt0))
       continue;
 
-    rt = export_filter_(c, rt0, &tmp, NULL, pool, 1);
+    rt = export_filter_(c, rt0, &tmp, pool, 1);
 
     if (!rt)
       continue;
@@ -807,7 +789,6 @@ rt_notify_merged(struct channel *c, net *net, rte *new_changed, rte *old_changed
   rte *old_best_free = NULL;
   rte *new_changed_free = NULL;
   rte *old_changed_free = NULL;
-  ea_list *tmpa = NULL;
 
   /* We assume that all rte arguments are either NULL or rte_is_valid() */
 
@@ -819,10 +800,10 @@ rt_notify_merged(struct channel *c, net *net, rte *new_changed, rte *old_changed
   if ((new_best == old_best) && !refeed)
   {
     new_changed = rte_mergable(new_best, new_changed) ?
-      export_filter(c, new_changed, &new_changed_free, NULL, 1) : NULL;
+      export_filter(c, new_changed, &new_changed_free, 1) : NULL;
 
     old_changed = rte_mergable(old_best, old_changed) ?
-      export_filter(c, old_changed, &old_changed_free, NULL, 1) : NULL;
+      export_filter(c, old_changed, &old_changed_free, 1) : NULL;
 
     if (!new_changed && !old_changed)
       return;
@@ -835,15 +816,15 @@ rt_notify_merged(struct channel *c, net *net, rte *new_changed, rte *old_changed
 
   /* Prepare new merged route */
   if (new_best)
-    new_best = rt_export_merged(c, net, &new_best_free, &tmpa, rte_update_pool, 0);
+    new_best = rt_export_merged(c, net, &new_best_free, rte_update_pool, 0);
 
   /* Prepare old merged route (without proper merged next hops) */
   /* There are some issues with running filter on old route - see rt_notify_basic() */
   if (old_best && !refeed)
-    old_best = export_filter(c, old_best, &old_best_free, NULL, 1);
+    old_best = export_filter(c, old_best, &old_best_free, 1);
 
   if (new_best || old_best)
-    do_rt_notify(c, net, new_best, old_best, tmpa, refeed);
+    do_rt_notify(c, net, new_best, old_best, refeed);
 
   /* Discard temporary rte's */
   if (new_best_free)
@@ -1341,7 +1322,6 @@ 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;
   struct filter *filter = c->in_filter;
-  ea_list *tmpa = NULL;
   rte *dummy = NULL;
   net *nn;
 
@@ -1379,11 +1359,11 @@ rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
 	}
       else
 	{
-	  tmpa = rte_make_tmp_attrs(new, rte_update_pool);
+	  rte_make_tmp_attrs(&new, rte_update_pool);
 	  if (filter && (filter != FILTER_REJECT))
 	    {
-	      ea_list *old_tmpa = tmpa;
-	      int fr = f_run(filter, &new, &tmpa, rte_update_pool, 0);
+	      ea_list *oldea = new->attrs->eattrs;
+	      int fr = f_run(filter, &new, rte_update_pool, 0);
 	      if (fr > F_ACCEPT)
 		{
 		  stats->imp_updates_filtered++;
@@ -1394,8 +1374,8 @@ rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
 
 		  new->flags |= REF_FILTERED;
 		}
-	      if (tmpa != old_tmpa && src->proto->store_tmp_attrs)
-		src->proto->store_tmp_attrs(new, tmpa);
+	      if (new->attrs->eattrs != oldea && src->proto->store_tmp_attrs)
+		src->proto->store_tmp_attrs(new);
 	    }
 	}
       if (!rta_is_cached(new->attrs)) /* Need to copy attributes */
@@ -1459,11 +1439,10 @@ rt_examine(rtable *t, net_addr *a, struct proto *p, struct filter *filter)
   rte_update_lock();
 
   /* Rest is stripped down export_filter() */
-  ea_list *tmpa = rte_make_tmp_attrs(rt, rte_update_pool);
-  int v = p->import_control ? p->import_control(p, &rt, &tmpa, rte_update_pool) : 0;
+  rte_make_tmp_attrs(&rt, rte_update_pool);
+  int v = p->import_control ? p->import_control(p, &rt, rte_update_pool) : 0;
   if (v == RIC_PROCESS)
-    v = (f_run(filter, &rt, &tmpa, rte_update_pool,
-	       FF_FORCE_TMPATTR | FF_SILENT) <= F_ACCEPT);
+    v = (f_run(filter, &rt, rte_update_pool, FF_SILENT) <= F_ACCEPT);
 
    /* Discard temporary rte */
   if (rt != n->routes)
diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index 83986cb9..d9e3aad2 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -1829,7 +1829,7 @@ babel_dump(struct proto *P)
 }
 
 static void
-babel_get_route_info(rte *rte, byte *buf, ea_list *attrs UNUSED)
+babel_get_route_info(rte *rte, byte *buf)
 {
   buf += bsprintf(buf, " (%d/%d) [%lR]", rte->pref, rte->u.babel.metric, rte->u.babel.router_id);
 }
@@ -2087,12 +2087,13 @@ babel_prepare_attrs(struct linpool *pool, ea_list *next, uint metric, u64 router
 
 
 static int
-babel_import_control(struct proto *P, struct rte **new, struct ea_list **attrs UNUSED, struct linpool *pool UNUSED)
+babel_import_control(struct proto *P, struct rte **new, struct linpool *pool)
 {
-  rte *e = *new;
+  struct babel_proto *p = (void *) P;
+  struct rta *a = (*new)->attrs;
 
   /* Reject our own unreachable routes */
-  if ((e->attrs->dest == RTD_UNREACHABLE) && (e->attrs->src->proto == P))
+  if ((a->dest == RTD_UNREACHABLE) && (a->src->proto == P))
     return -1;
 
   return 0;
@@ -2105,9 +2106,9 @@ babel_make_tmp_attrs(struct rte *rt, struct linpool *pool)
 }
 
 static void
-babel_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
+babel_store_tmp_attrs(struct rte *rt)
 {
-  rt->u.babel.metric = ea_get_int(attrs, EA_BABEL_METRIC, 0);
+  rt->u.babel.metric = ea_get_int(rt->attrs->eattrs, EA_BABEL_METRIC, 0);
 }
 
 /*
@@ -2116,7 +2117,7 @@ babel_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
  */
 static void
 babel_rt_notify(struct proto *P, struct channel *c UNUSED, struct network *net,
-		struct rte *new, struct rte *old UNUSED, struct ea_list *attrs UNUSED)
+		struct rte *new, struct rte *old UNUSED)
 {
   struct babel_proto *p = (void *) P;
   struct babel_entry *e;
@@ -2126,7 +2127,7 @@ babel_rt_notify(struct proto *P, struct channel *c UNUSED, struct network *net,
     /* Update */
     uint internal = (new->attrs->src->proto == P);
     uint rt_seqno = internal ? new->u.babel.seqno : p->update_seqno;
-    uint rt_metric = ea_get_int(attrs, EA_BABEL_METRIC, 0);
+    uint rt_metric = ea_get_int(new->attrs->eattrs, EA_BABEL_METRIC, 0);
     u64 rt_router_id = internal ? new->u.babel.router_id : p->router_id;
 
     if (rt_metric > BABEL_INFINITY)
diff --git a/proto/babel/config.Y b/proto/babel/config.Y
index 205b4e4f..2b20c43f 100644
--- a/proto/babel/config.Y
+++ b/proto/babel/config.Y
@@ -125,7 +125,7 @@ babel_iface_opt_list:
 babel_iface:
   babel_iface_start iface_patt_list_nopx babel_iface_opt_list babel_iface_finish;
 
-CF_ADDTO(dynamic_attr, BABEL_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_BABEL_METRIC); })
+CF_ADDTO(dynamic_attr, BABEL_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_BABEL_METRIC); })
 
 CF_CLI_HELP(SHOW BABEL, ..., [[Show information about Babel protocol]]);
 
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index 5695e1c1..d65f6334 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -1372,7 +1372,7 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px)
  */
 
 int
-bgp_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct linpool *pool UNUSED)
+bgp_import_control(struct proto *P, rte **new, struct linpool *pool UNUSED)
 {
   rte *e = *new;
   struct proto *SRC = e->attrs->src->proto;
@@ -1536,7 +1536,7 @@ bgp_update_attrs(struct bgp_proto *p, struct bgp_channel *c, rte *e, ea_list *at
 }
 
 void
-bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old, ea_list *attrs)
+bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old)
 {
   struct bgp_proto *p = (void *) P;
   struct bgp_channel *c = (void *) C;
@@ -1546,7 +1546,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old, ea
 
   if (new)
   {
-    attrs = bgp_update_attrs(p, c, new, attrs, bgp_linpool2);
+    struct ea_list *attrs = bgp_update_attrs(p, c, new, new->attrs->eattrs, bgp_linpool2);
 
     /* If attributes are invalid, we fail back to withdraw */
     buck = attrs ? bgp_get_bucket(c, attrs) : bgp_get_withdraw_bucket(c);
@@ -2007,10 +2007,10 @@ bgp_get_attr(eattr *a, byte *buf, int buflen)
 }
 
 void
-bgp_get_route_info(rte *e, byte *buf, ea_list *attrs)
+bgp_get_route_info(rte *e, byte *buf)
 {
-  eattr *p = ea_find(attrs, EA_CODE(PROTOCOL_BGP, BA_AS_PATH));
-  eattr *o = ea_find(attrs, EA_CODE(PROTOCOL_BGP, BA_ORIGIN));
+  eattr *p = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_AS_PATH));
+  eattr *o = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_ORIGIN));
   u32 origas;
 
   buf += bsprintf(buf, " (%d", e->pref);
diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h
index de05dcfb..1235ee78 100644
--- a/proto/bgp/bgp.h
+++ b/proto/bgp/bgp.h
@@ -505,10 +505,10 @@ void bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *bp);
 int bgp_rte_better(struct rte *, struct rte *);
 int bgp_rte_mergable(rte *pri, rte *sec);
 int bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best);
-void bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old, ea_list *attrs);
-int bgp_import_control(struct proto *, struct rte **, struct ea_list **, struct linpool *);
+void bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old);
+int bgp_import_control(struct proto *, struct rte **, struct linpool *);
 int bgp_get_attr(struct eattr *e, byte *buf, int buflen);
-void bgp_get_route_info(struct rte *, byte *buf, struct ea_list *attrs);
+void bgp_get_route_info(struct rte *, byte *buf);
 
 
 /* packets.c */
diff --git a/proto/ospf/config.Y b/proto/ospf/config.Y
index 0b09966d..c439a614 100644
--- a/proto/ospf/config.Y
+++ b/proto/ospf/config.Y
@@ -497,10 +497,10 @@ ospf_iface:
   ospf_iface_start ospf_iface_patt_list ospf_iface_opt_list { ospf_iface_finish(); }
  ;
 
-CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC1); })
-CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC2); })
-CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_TAG); })
-CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
+CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_OSPF_METRIC1); })
+CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_OSPF_METRIC2); })
+CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_OSPF_TAG); })
+CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID, T_QUAD, EA_OSPF_ROUTER_ID); })
 
 CF_CLI_HELP(SHOW OSPF, ..., [[Show information about OSPF protocol]]);
 CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol]])
diff --git a/proto/ospf/ospf.c b/proto/ospf/ospf.c
index d9edc3e7..fa122f01 100644
--- a/proto/ospf/ospf.c
+++ b/proto/ospf/ospf.c
@@ -101,9 +101,9 @@
 #include <stdlib.h>
 #include "ospf.h"
 
-static int ospf_import_control(struct proto *P, rte **new, ea_list **attrs, struct linpool *pool);
+static int ospf_import_control(struct proto *P, rte **new, struct linpool *pool);
 static struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
-static void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs);
+static void ospf_store_tmp_attrs(struct rte *rt);
 static void ospf_reload_routes(struct channel *C);
 static int ospf_rte_better(struct rte *new, struct rte *old);
 static int ospf_rte_same(struct rte *new, struct rte *old);
@@ -446,7 +446,7 @@ ospf_disp(timer * timer)
  * import to the filters.
  */
 static int
-ospf_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct linpool *pool UNUSED)
+ospf_import_control(struct proto *P, rte **new, struct linpool *pool)
 {
   struct ospf_proto *p = (struct ospf_proto *) P;
   struct ospf_area *oa = ospf_main_area(p);
@@ -471,12 +471,12 @@ ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool)
 }
 
 static void
-ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
+ospf_store_tmp_attrs(struct rte *rt)
 {
-  rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY);
-  rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000);
-  rt->u.ospf.tag = ea_get_int(attrs, EA_OSPF_TAG, 0);
-  rt->u.ospf.router_id = ea_get_int(attrs, EA_OSPF_ROUTER_ID, 0);
+  rt->u.ospf.metric1 = ea_get_int(rt->attrs->eattrs, EA_OSPF_METRIC1, LSINFINITY);
+  rt->u.ospf.metric2 = ea_get_int(rt->attrs->eattrs, EA_OSPF_METRIC2, 10000);
+  rt->u.ospf.tag = ea_get_int(rt->attrs->eattrs, EA_OSPF_TAG, 0);
+  rt->u.ospf.router_id = ea_get_int(rt->attrs->eattrs, EA_OSPF_ROUTER_ID, 0);
 }
 
 /**
@@ -535,7 +535,7 @@ ospf_get_status(struct proto *P, byte * buf)
 }
 
 static void
-ospf_get_route_info(rte * rte, byte * buf, ea_list * attrs UNUSED)
+ospf_get_route_info(rte * rte, byte * buf)
 {
   char *type = "<bug>";
 
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index e909bbe9..54b255c9 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -1243,11 +1243,12 @@ find_surrogate_fwaddr(struct ospf_proto *p, struct ospf_area *oa)
 }
 
 void
-ospf_rt_notify(struct proto *P, struct channel *ch UNUSED, net *n, rte *new, rte *old UNUSED, ea_list *ea)
+ospf_rt_notify(struct proto *P, struct channel *ch UNUSED, net *n, rte *new, rte *old UNUSED)
 {
   struct ospf_proto *p = (struct ospf_proto *) P;
   struct ospf_area *oa = NULL;	/* non-NULL for NSSA-LSA */
   ort *nf;
+  struct ea_list *ea = new->attrs->eattrs;
 
   /*
    * There are several posibilities:
diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index ac87334b..54ec9ccf 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -188,7 +188,7 @@ void ospf_originate_sum_net_lsa(struct ospf_proto *p, struct ospf_area *oa, ort
 void ospf_originate_sum_rt_lsa(struct ospf_proto *p, struct ospf_area *oa, u32 drid, int metric, u32 options);
 void ospf_originate_ext_lsa(struct ospf_proto *p, struct ospf_area *oa, ort *nf, u8 mode, u32 metric, u32 ebit, ip_addr fwaddr, u32 tag, int pbit);
 
-void ospf_rt_notify(struct proto *P, struct channel *ch, net *n, rte *new, rte *old, ea_list *attrs);
+void ospf_rt_notify(struct proto *P, struct channel *ch, net *n, rte *new, rte *old);
 void ospf_update_topology(struct ospf_proto *p);
 
 struct top_hash_entry *ospf_hash_find(struct top_graph *, u32 domain, u32 lsa, u32 rtr, u32 type);
diff --git a/proto/pipe/pipe.c b/proto/pipe/pipe.c
index ffc677f4..7aada37e 100644
--- a/proto/pipe/pipe.c
+++ b/proto/pipe/pipe.c
@@ -44,7 +44,7 @@
 #include "pipe.h"
 
 static void
-pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *old, ea_list *attrs)
+pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *old)
 {
   struct pipe_proto *p = (void *) P;
   struct channel *dst = (src_ch == p->pri) ? p->sec : p->pri;
@@ -69,7 +69,6 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
       memcpy(a, new->attrs, rta_size(new->attrs));
 
       a->aflags = 0;
-      a->eattrs = attrs;
       a->hostentry = NULL;
       e = rte_get_temp(a);
       e->pflags = 0;
@@ -93,7 +92,7 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
 }
 
 static int
-pipe_import_control(struct proto *P, rte **ee, ea_list **ea UNUSED, struct linpool *p UNUSED)
+pipe_import_control(struct proto *P, rte **ee, struct linpool *p UNUSED)
 {
   struct proto *pp = (*ee)->sender->proto;
 
diff --git a/proto/radv/radv.c b/proto/radv/radv.c
index 2f5f1c27..ce88c7cc 100644
--- a/proto/radv/radv.c
+++ b/proto/radv/radv.c
@@ -395,7 +395,7 @@ radv_net_match_trigger(struct radv_config *cf, net *n)
 }
 
 int
-radv_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct linpool *pool UNUSED)
+radv_import_control(struct proto *P, rte **new, struct linpool *pool UNUSED)
 {
   // struct radv_proto *p = (struct radv_proto *) P;
   struct radv_config *cf = (struct radv_config *) (P->cf);
@@ -410,7 +410,7 @@ radv_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct l
 }
 
 static void
-radv_rt_notify(struct proto *P, struct channel *ch UNUSED, net *n, rte *new, rte *old UNUSED, ea_list *attrs)
+radv_rt_notify(struct proto *P, struct channel *ch UNUSED, net *n, rte *new, rte *old UNUSED)
 {
   struct radv_proto *p = (struct radv_proto *) P;
   struct radv_config *cf = (struct radv_config *) (P->cf);
@@ -448,11 +448,11 @@ radv_rt_notify(struct proto *P, struct channel *ch UNUSED, net *n, rte *new, rte
   {
     /* Update */
 
-    ea = ea_find(attrs, EA_RA_PREFERENCE);
+    ea = ea_find(new->attrs->eattrs, EA_RA_PREFERENCE);
     uint preference = ea ? ea->u.data : RA_PREF_MEDIUM;
     uint preference_set = !!ea;
 
-    ea = ea_find(attrs, EA_RA_LIFETIME);
+    ea = ea_find(new->attrs->eattrs, EA_RA_LIFETIME);
     uint lifetime = ea ? ea->u.data : 0;
     uint lifetime_set = !!ea;
 
diff --git a/proto/rip/config.Y b/proto/rip/config.Y
index aff63f03..c46cf00c 100644
--- a/proto/rip/config.Y
+++ b/proto/rip/config.Y
@@ -186,8 +186,8 @@ rip_iface:
   rip_iface_start iface_patt_list_nopx rip_iface_opt_list rip_iface_finish;
 
 
-CF_ADDTO(dynamic_attr, RIP_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_RIP_METRIC); })
-CF_ADDTO(dynamic_attr, RIP_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_RIP_TAG); })
+CF_ADDTO(dynamic_attr, RIP_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_RIP_METRIC); })
+CF_ADDTO(dynamic_attr, RIP_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_RIP_TAG); })
 
 CF_CLI_HELP(SHOW RIP, ..., [[Show information about RIP protocol]]);
 
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index adc2b471..90bf8e5c 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -298,7 +298,7 @@ rip_withdraw_rte(struct rip_proto *p, net_addr *n, struct rip_neighbor *from)
  */
 static void
 rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, struct rte *new,
-	      struct rte *old UNUSED, struct ea_list *attrs)
+	      struct rte *old UNUSED)
 {
   struct rip_proto *p = (struct rip_proto *) P;
   struct rip_entry *en;
@@ -307,8 +307,8 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
   if (new)
   {
     /* Update */
-    u32 rt_metric = ea_get_int(attrs, EA_RIP_METRIC, 1);
-    u32 rt_tag = ea_get_int(attrs, EA_RIP_TAG, 0);
+    u32 rt_metric = ea_get_int(new->attrs->eattrs, EA_RIP_METRIC, 1);
+    u32 rt_tag = ea_get_int(new->attrs->eattrs, EA_RIP_TAG, 0);
 
     if (rt_metric > p->infinity)
     {
@@ -1040,10 +1040,10 @@ rip_make_tmp_attrs(struct rte *rt, struct linpool *pool)
 }
 
 static void
-rip_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
+rip_store_tmp_attrs(struct rte *rt)
 {
-  rt->u.rip.metric = ea_get_int(attrs, EA_RIP_METRIC, 1);
-  rt->u.rip.tag = ea_get_int(attrs, EA_RIP_TAG, 0);
+  rt->u.rip.metric = ea_get_int(rt->attrs->eattrs, EA_RIP_METRIC, 1);
+  rt->u.rip.tag = ea_get_int(rt->attrs->eattrs, EA_RIP_TAG, 0);
 }
 
 static int
@@ -1081,7 +1081,6 @@ rip_init(struct proto_config *CF)
   P->if_notify = rip_if_notify;
   P->rt_notify = rip_rt_notify;
   P->neigh_notify = rip_neigh_notify;
-  // P->import_control = rip_import_control;
   P->reload_routes = rip_reload_routes;
   P->make_tmp_attrs = rip_make_tmp_attrs;
   P->store_tmp_attrs = rip_store_tmp_attrs;
@@ -1145,7 +1144,7 @@ rip_reconfigure(struct proto *P, struct proto_config *CF)
 }
 
 static void
-rip_get_route_info(rte *rte, byte *buf, ea_list *attrs UNUSED)
+rip_get_route_info(rte *rte, byte *buf)
 {
   buf += bsprintf(buf, " (%d/%d)", rte->pref, rte->u.rip.metric);
 
diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index e56dd616..8522e415 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -347,8 +347,7 @@ krt_send_route(struct krt_proto *p, int cmd, rte *e)
 }
 
 void
-krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old,
-		struct ea_list *eattrs UNUSED)
+krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old)
 {
   int err = 0;
 
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index f5db1575..73f77147 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1177,11 +1177,12 @@ nh_bufsize(struct nexthop *nh)
 }
 
 static int
-nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int dest, struct nexthop *nh)
+nl_send_route(struct krt_proto *p, rte *e, int op, int dest, struct nexthop *nh)
 {
   eattr *ea;
   net *net = e->net;
   rta *a = e->attrs;
+  ea_list *eattrs = a->eattrs;
   int bufsize = 128 + KRT_METRICS_MAX*8 + nh_bufsize(&(a->nh));
   u32 priority = 0;
 
@@ -1328,7 +1329,7 @@ dest:
 }
 
 static inline int
-nl_add_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs)
+nl_add_rte(struct krt_proto *p, rte *e)
 {
   rta *a = e->attrs;
   int err = 0;
@@ -1337,34 +1338,34 @@ nl_add_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs)
   {
     struct nexthop *nh = &(a->nh);
 
-    err = nl_send_route(p, e, eattrs, NL_OP_ADD, RTD_UNICAST, nh);
+    err = nl_send_route(p, e, NL_OP_ADD, RTD_UNICAST, nh);
     if (err < 0)
       return err;
 
     for (nh = nh->next; nh; nh = nh->next)
-      err += nl_send_route(p, e, eattrs, NL_OP_APPEND, RTD_UNICAST, nh);
+      err += nl_send_route(p, e, NL_OP_APPEND, RTD_UNICAST, nh);
 
     return err;
   }
 
-  return nl_send_route(p, e, eattrs, NL_OP_ADD, a->dest, &(a->nh));
+  return nl_send_route(p, e, NL_OP_ADD, a->dest, &(a->nh));
 }
 
 static inline int
-nl_delete_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs)
+nl_delete_rte(struct krt_proto *p, rte *e)
 {
   int err = 0;
 
   /* For IPv6, we just repeatedly request DELETE until we get error */
   do
-    err = nl_send_route(p, e, eattrs, NL_OP_DELETE, RTD_NONE, NULL);
+    err = nl_send_route(p, e, NL_OP_DELETE, RTD_NONE, NULL);
   while (krt_ecmp6(p) && !err);
 
   return err;
 }
 
 void
-krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs)
+krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old)
 {
   int err = 0;
 
@@ -1380,10 +1381,10 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list
    */
 
   if (old)
-    nl_delete_rte(p, old, eattrs);
+    nl_delete_rte(p, old);
 
   if (new)
-    err = nl_add_rte(p, new, eattrs);
+    err = nl_add_rte(p, new);
 
   if (err < 0)
     n->n.flags |= KRF_SYNC_ERROR;
diff --git a/sysdep/unix/krt.Y b/sysdep/unix/krt.Y
index 9aac8668..98740b70 100644
--- a/sysdep/unix/krt.Y
+++ b/sysdep/unix/krt.Y
@@ -122,8 +122,8 @@ kif_iface:
   kif_iface_start iface_patt_list_nopx kif_iface_opt_list;
 
 
-CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_SOURCE); })
-CF_ADDTO(dynamic_attr, KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_METRIC); })
+CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SOURCE); })
+CF_ADDTO(dynamic_attr, KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_METRIC); })
 
 CF_CODE
 
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index ae51927e..a79df54e 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -551,7 +551,7 @@ krt_flush_routes(struct krt_proto *p)
       if (rte_is_valid(e) && (n->n.flags & KRF_INSTALLED))
 	{
 	  /* FIXME: this does not work if gw is changed in export filter */
-	  krt_replace_rte(p, e->net, NULL, e, NULL);
+	  krt_replace_rte(p, e->net, NULL, e);
 	  n->n.flags &= ~KRF_INSTALLED;
 	}
     }
@@ -559,14 +559,14 @@ krt_flush_routes(struct krt_proto *p)
 }
 
 static struct rte *
-krt_export_net(struct krt_proto *p, net *net, rte **rt_free, ea_list **tmpa)
+krt_export_net(struct krt_proto *p, net *net, rte **rt_free)
 {
   struct channel *c = p->p.main_channel;
   struct filter *filter = c->out_filter;
   rte *rt;
 
   if (c->ra_mode == RA_MERGED)
-    return rt_export_merged(c, net, rt_free, tmpa, krt_filter_lp, 1);
+    return rt_export_merged(c, net, rt_free, krt_filter_lp, 1);
 
   rt = net->routes;
   *rt_free = NULL;
@@ -577,15 +577,14 @@ krt_export_net(struct krt_proto *p, net *net, rte **rt_free, ea_list **tmpa)
   if (filter == FILTER_REJECT)
     return NULL;
 
-  struct proto *src = rt->attrs->src->proto;
-  *tmpa = src->make_tmp_attrs ? src->make_tmp_attrs(rt, krt_filter_lp) : NULL;
+  rte_make_tmp_attrs(&rt, krt_filter_lp);
 
   /* We could run krt_import_control() here, but it is already handled by KRF_INSTALLED */
 
   if (filter == FILTER_ACCEPT)
     goto accept;
 
-  if (f_run(filter, &rt, tmpa, krt_filter_lp, FF_FORCE_TMPATTR | FF_SILENT) > F_ACCEPT)
+  if (f_run(filter, &rt, krt_filter_lp, FF_SILENT) > F_ACCEPT)
     goto reject;
 
 
@@ -667,9 +666,8 @@ krt_got_route(struct krt_proto *p, rte *e)
   if (net->n.flags & KRF_INSTALLED)
     {
       rte *new, *rt_free;
-      ea_list *tmpa;
 
-      new = krt_export_net(p, net, &rt_free, &tmpa);
+      new = krt_export_net(p, net, &rt_free);
 
       /* TODO: There also may be changes in route eattrs, we ignore that for now. */
 
@@ -714,7 +712,6 @@ krt_prune(struct krt_proto *p)
     {
       int verdict = n->n.flags & KRF_VERDICT_MASK;
       rte *new, *old, *rt_free = NULL;
-      ea_list *tmpa = NULL;
 
       if (verdict == KRF_UPDATE || verdict == KRF_DELETE)
 	{
@@ -728,12 +725,10 @@ krt_prune(struct krt_proto *p)
       if (verdict == KRF_CREATE || verdict == KRF_UPDATE)
 	{
 	  /* We have to run export filter to get proper 'new' route */
-	  new = krt_export_net(p, n, &rt_free, &tmpa);
+	  new = krt_export_net(p, n, &rt_free);
 
 	  if (!new)
 	    verdict = (verdict == KRF_CREATE) ? KRF_IGNORE : KRF_DELETE;
-	  else
-	    tmpa = ea_append(tmpa, new->attrs->eattrs);
 	}
       else
 	new = NULL;
@@ -744,7 +739,7 @@ krt_prune(struct krt_proto *p)
 	  if (new && (n->n.flags & KRF_INSTALLED))
 	    {
 	      krt_trace_in(p, new, "reinstalling");
-	      krt_replace_rte(p, n, new, NULL, tmpa);
+	      krt_replace_rte(p, n, new, NULL);
 	    }
 	  break;
 	case KRF_SEEN:
@@ -753,11 +748,11 @@ krt_prune(struct krt_proto *p)
 	  break;
 	case KRF_UPDATE:
 	  krt_trace_in(p, new, "updating");
-	  krt_replace_rte(p, n, new, old, tmpa);
+	  krt_replace_rte(p, n, new, old);
 	  break;
 	case KRF_DELETE:
 	  krt_trace_in(p, old, "deleting");
-	  krt_replace_rte(p, n, NULL, old, NULL);
+	  krt_replace_rte(p, n, NULL, old);
 	  break;
 	default:
 	  bug("krt_prune: invalid route status");
@@ -795,7 +790,7 @@ krt_got_route_async(struct krt_proto *p, rte *e, int new)
       if (new)
 	{
 	  krt_trace_in(p, e, "[redirect] deleting");
-	  krt_replace_rte(p, net, NULL, e, NULL);
+	  krt_replace_rte(p, net, NULL, e);
 	}
       /* If !new, it is probably echo of our deletion */
       break;
@@ -937,14 +932,14 @@ krt_make_tmp_attrs(rte *rt, struct linpool *pool)
 }
 
 static void
-krt_store_tmp_attrs(rte *rt, struct ea_list *attrs)
+krt_store_tmp_attrs(rte *rt)
 {
   /* EA_KRT_SOURCE is read-only */
-  rt->u.krt.metric = ea_get_int(attrs, EA_KRT_METRIC, 0);
+  rt->u.krt.metric = ea_get_int(rt->attrs->eattrs, EA_KRT_METRIC, 0);
 }
 
 static int
-krt_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct linpool *pool UNUSED)
+krt_import_control(struct proto *P, rte **new, struct linpool *pool UNUSED)
 {
   // struct krt_proto *p = (struct krt_proto *) P;
   rte *e = *new;
@@ -975,7 +970,7 @@ krt_import_control(struct proto *P, rte **new, ea_list **attrs UNUSED, struct li
 
 static void
 krt_rt_notify(struct proto *P, struct channel *ch UNUSED, net *net,
-	      rte *new, rte *old, struct ea_list *eattrs)
+	      rte *new, rte *old)
 {
   struct krt_proto *p = (struct krt_proto *) P;
 
@@ -988,7 +983,7 @@ krt_rt_notify(struct proto *P, struct channel *ch UNUSED, net *net,
   else
     net->n.flags &= ~KRF_INSTALLED;
   if (p->initialized)		/* Before first scan we don't touch the routes */
-    krt_replace_rte(p, net, new, old, eattrs);
+    krt_replace_rte(p, net, new, old);
 }
 
 static void
diff --git a/sysdep/unix/krt.h b/sysdep/unix/krt.h
index ff27bcf5..6ace2a86 100644
--- a/sysdep/unix/krt.h
+++ b/sysdep/unix/krt.h
@@ -139,7 +139,7 @@ void krt_sys_copy_config(struct krt_config *, struct krt_config *);
 
 int  krt_capable(rte *e);
 void krt_do_scan(struct krt_proto *);
-void krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs);
+void krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old);
 int krt_sys_get_attr(eattr *a, byte *buf, int buflen);