KRT: Remove KRF_SYNC_ERROR flag

This info is now stored in an internal bmap. Unfortunately, net.flags
is still needed for temporary kernel data.

nest/route.h

@@ -348,6 +348,7 @@ struct rt_show_data {
   struct proto *export_protocol;
   struct channel *export_channel;
   struct config *running_on_config;
+  struct krt_proto *kernel;
   int export_mode, primary_only, filtered, stats, show_for;
 
   int table_open;			/* Iteration (fit) is open */
@@ -452,9 +453,6 @@ typedef struct rta {
 #define RTD_PROHIBIT 4			/* Administratively prohibited */
 #define RTD_MAX 5
 
-					/* Flags for net->n.flags, used by kernel syncer */
-#define KRF_SYNC_ERROR 0x40		/* Error during kernel table synchronization */
-
 #define RTAF_CACHED 1			/* This is a cached rta */
 
 #define IGP_METRIC_UNKNOWN 0x80000000	/* Default igp_metric used when no other

nest/rt-show.c

@@ -15,6 +15,7 @@
 #include "nest/cli.h"
 #include "nest/iface.h"
 #include "filter/filter.h"
+#include "sysdep/unix/krt.h"
 
 static void
 rt_show_table(struct cli *c, struct rt_show_data *d)
@@ -28,13 +29,20 @@ rt_show_table(struct cli *c, struct rt_show_data *d)
   d->last_table = d->tab;
 }
 
+static inline struct krt_proto *
+rt_show_get_kernel(struct rt_show_data *d)
+{
+  struct proto_config *krt = d->tab->table->config->krt_attached;
+  return krt ? (struct krt_proto *) krt->proto : NULL;
+}
+
 static void
 rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, int primary)
 {
   byte from[IPA_MAX_TEXT_LENGTH+8];
   byte tm[TM_DATETIME_BUFFER_SIZE], info[256];
   rta *a = e->attrs;
-  int sync_error = (e->net->n.flags & KRF_SYNC_ERROR);
+  int sync_error = d->kernel ? krt_get_sync_error(d->kernel, e) : 0;
   void (*get_route_info)(struct rte *, byte *buf);
   struct nexthop *nh;
 
@@ -230,6 +238,7 @@ rt_show_cont(struct cli *c)
     FIB_ITERATE_INIT(&d->fit, &d->tab->table->fib);
     d->table_open = 1;
     d->table_counter++;
+    d->kernel = rt_show_get_kernel(d);
 
     d->show_counter_last = d->show_counter;
     d->rt_counter_last   = d->rt_counter;
@@ -260,6 +269,7 @@ rt_show_cont(struct cli *c)
 	       d->net_counter - d->net_counter_last, d->tab->table->name);
   }
 
+  d->kernel = NULL;
   d->table_open = 0;
   d->tab = NODE_NEXT(d->tab);
 
@@ -403,6 +413,7 @@ rt_show(struct rt_show_data *d)
     WALK_LIST(tab, d->tables)
     {
       d->tab = tab;
+      d->kernel = rt_show_get_kernel(d);
 
       if (d->show_for)
 	n = net_route(tab->table, d->addr);

sysdep/bsd/krt-sock.c

@@ -357,10 +357,13 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old)
   if (new)
     err = krt_send_route(p, RTM_ADD, new);
 
+  if (new)
+  {
     if (err < 0)
-    n->n.flags |= KRF_SYNC_ERROR;
+      bmap_clear(&p->sync_map, new->id);
     else
-    n->n.flags &= ~KRF_SYNC_ERROR;
+      bmap_set(&p->sync_map, new->id);
+  }
 }
 
 #define SKIP(ARG...) do { DBG("KRT: Ignoring route - " ARG); return; } while(0)

sysdep/linux/netlink.c

@@ -1399,7 +1399,7 @@ nl_replace_rte(struct krt_proto *p, rte *e)
 
 
 void
-krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old)
+krt_replace_rte(struct krt_proto *p, net *n UNUSED, rte *new, rte *old)
 {
   int err = 0;
 
@@ -1428,10 +1428,13 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old)
       err = nl_add_rte(p, new);
   }
 
+  if (new)
+  {
     if (err < 0)
-    n->n.flags |= KRF_SYNC_ERROR;
+      bmap_clear(&p->sync_map, new->id);
     else
-    n->n.flags &= ~KRF_SYNC_ERROR;
+      bmap_set(&p->sync_map, new->id);
+  }
 }
 
 static int

sysdep/unix/krt.c

@@ -677,7 +677,7 @@ krt_got_route(struct krt_proto *p, rte *e)
 
       if (!new)
 	verdict = KRF_DELETE;
-      else if ((net->n.flags & KRF_SYNC_ERROR) || !krt_same_dest(e, new))
+      else if (!bmap_test(&p->sync_map, new->id) || !krt_same_dest(e, new))
 	verdict = KRF_UPDATE;
       else
 	verdict = KRF_SEEN;
@@ -1094,6 +1094,7 @@ krt_start(struct proto *P)
   default: log(L_ERR "KRT: Tried to start with strange net type: %d", p->p.net_type); return PS_START; break;
   }
 
+  bmap_init(&p->sync_map, p->p.pool, 1024);
   add_tail(&krt_proto_list, &p->krt_node);
 
 #ifdef KRT_ALLOW_LEARN
@@ -1133,6 +1134,7 @@ krt_shutdown(struct proto *P)
 
   krt_sys_shutdown(p);
   rem_node(&p->krt_node);
+  bmap_free(&p->sync_map);
 
   return PS_DOWN;
 }

sysdep/unix/krt.h

@@ -65,6 +65,7 @@ struct krt_proto {
   timer *scan_timer;
 #endif
 
+  struct bmap sync_map;		/* Keeps track which exported routes were successfully written to kernel */
   node krt_node;		/* Node in krt_proto_list */
   byte af;			/* Kernel address family (AF_*) */
   byte ready;			/* Initial feed has been finished */
@@ -86,6 +87,14 @@ void kif_request_scan(void);
 void krt_got_route(struct krt_proto *p, struct rte *e);
 void krt_got_route_async(struct krt_proto *p, struct rte *e, int new);
 
+static inline int
+krt_get_sync_error(struct krt_proto *p, struct rte *e)
+{
+  return (p->p.proto_state == PS_UP) &&
+    bmap_test(&p->p.main_channel->export_map, e->id) &&
+    !bmap_test(&p->sync_map, e->id);
+}
+
 /* Values for rte->u.krt_sync.src */
 #define KRT_SRC_UNKNOWN	-1	/* Nobody knows */
 #define KRT_SRC_BIRD	 0	/* Our route (not passed in async mode) */