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-rw-r--r--bgpd/ChangeLog31
-rw-r--r--bgpd/bgp_route.c207
-rw-r--r--bgpd/bgp_route.h2
-rw-r--r--bgpd/bgpd.h3
4 files changed, 130 insertions, 113 deletions
diff --git a/bgpd/ChangeLog b/bgpd/ChangeLog
index 85388304..7fbc79c8 100644
--- a/bgpd/ChangeLog
+++ b/bgpd/ChangeLog
@@ -1,3 +1,34 @@
+2005-08-22 Paul Jakma <paul.jakma@sun.com>
+
+ * bgp_route.h: (struct bgp_info) add a new flag, BGP_INFO_REMOVED.
+ BGP_INFO_VALID is already overloaded, don't care to do same thing
+ to STALE or HISTORY.
+ * bgpd.h: (BGP_INFO_HOLDDOWN) Add INFO_REMOVED to the macro, as a
+ route which should generally be ignored.
+ * bgp_route.c: (bgp_info_delete) Just set the REMOVE flag, rather
+ than doing actual work, so that bgp_process (called directly,
+ or indirectly via the scanner) can catch withdrawn routes.
+ (bgp_info_reap) Actually remove the route, what bgp_info_delete
+ used to do, only for use by bgp_process.
+ (bgp_best_selection) reap any REMOVED routes, other than the old
+ selected route.
+ (bgp_process_rsclient) reap the old-selected route, if appropriate
+ (bgp_process_main) ditto
+ (bgp_rib_withdraw, bgp_rib_remove) make them more consistent with
+ each other. Don't play games with the VALID flag, bgp_process
+ is async now, so it didn't make a difference anyway.
+ Remove the 'force' argument from bgp_rib_withdraw, withdraw+force
+ is equivalent to bgp_rib_remove. Update all its callers.
+ (bgp_update_rsclient) bgp_rib_withdraw and force set is same as
+ bgp_rib_remove.
+ (route_vty_short_status_out) new helper to print the leading
+ route-status string used in many command outputs. Consolidate.
+ (route_vty_out, route_vty_out_tag, damp_route_vty_out,
+ flap_route_vty_out) use route_vty_short_status_out rather than
+ duplicate.
+ (route_vty_out_detail) print state of REMOVED flag.
+ (BGP_SHOW_SCODE_HEADER) update for Removed flag.
+
2005-08-03 Hasso Tepper <hasso at quagga.net>
* bgp_routemap.c: Revert part of leaking communities fix commited in
diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index 93074abb..862fd433 100644
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -164,8 +164,10 @@ bgp_info_add (struct bgp_node *rn, struct bgp_info *ri)
peer_lock (ri->peer); /* bgp_info peer reference */
}
-void
-bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri)
+/* Do the actual removal of info from RIB, for use by bgp_process
+ completion callback *only* */
+static void
+bgp_info_reap (struct bgp_node *rn, struct bgp_info *ri)
{
if (ri->next)
ri->next->prev = ri->prev;
@@ -178,6 +180,15 @@ bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri)
bgp_unlock_node (rn);
}
+void
+bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri)
+{
+ /* leave info in place for now in place for now,
+ * bgp_process will reap it later. */
+ SET_FLAG (ri->flags, BGP_INFO_REMOVED);
+ UNSET_FLAG (ri->flags, BGP_INFO_VALID);
+}
+
/* Get MED value. If MED value is missing and "bgp bestpath
missing-as-worst" is specified, treat it as the worst value. */
static u_int32_t
@@ -1097,7 +1108,8 @@ bgp_best_selection (struct bgp *bgp, struct bgp_node *rn, struct bgp_info_pair *
struct bgp_info *ri;
struct bgp_info *ri1;
struct bgp_info *ri2;
-
+ struct bgp_info *nextri = NULL;
+
/* bgp deterministic-med */
new_select = NULL;
if (bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
@@ -1137,13 +1149,22 @@ bgp_best_selection (struct bgp *bgp, struct bgp_node *rn, struct bgp_info_pair *
/* Check old selected route and new selected route. */
old_select = NULL;
new_select = NULL;
- for (ri = rn->info; ri; ri = ri->next)
+ for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); ri = nextri)
{
if (CHECK_FLAG (ri->flags, BGP_INFO_SELECTED))
old_select = ri;
if (BGP_INFO_HOLDDOWN (ri))
- continue;
+ {
+ /* reap REMOVED routes, if needs be
+ * selected route must stay for a while longer though
+ */
+ if (CHECK_FLAG (ri->flags, BGP_INFO_REMOVED)
+ && (ri != old_select))
+ bgp_info_reap (rn, ri);
+
+ continue;
+ }
if (bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED)
&& (! CHECK_FLAG (ri->flags, BGP_INFO_DMED_SELECTED)))
@@ -1157,7 +1178,7 @@ bgp_best_selection (struct bgp *bgp, struct bgp_node *rn, struct bgp_info_pair *
if (bgp_info_cmp (bgp, ri, new_select))
new_select = ri;
}
-
+
result->old = old_select;
result->new = new_select;
@@ -1269,6 +1290,9 @@ bgp_process_rsclient (struct bgp_process_queue *pq)
&attr, afi, safi);
}
+ if (old_select && CHECK_FLAG (old_select->flags, BGP_INFO_REMOVED))
+ bgp_info_reap (rn, old_select);
+
UNSET_FLAG (rn->flags, BGP_NODE_PROCESS_SCHEDULED);
return WQ_SUCCESS;
}
@@ -1345,6 +1369,11 @@ bgp_process_main (struct bgp_process_queue *pq)
bgp_zebra_withdraw (p, old_select);
}
}
+
+ /* Reap old select bgp_info, it it has been removed */
+ if (old_select && CHECK_FLAG (old_select->flags, BGP_INFO_REMOVED))
+ bgp_info_reap (rn, old_select);
+
UNSET_FLAG (rn->flags, BGP_NODE_PROCESS_SCHEDULED);
return WQ_SUCCESS;
}
@@ -1512,57 +1541,56 @@ bgp_maximum_prefix_overflow (struct peer *peer, afi_t afi,
return 0;
}
+/* Unconditionally remove the route from the RIB, without taking
+ * damping into consideration (eg, because the session went down)
+ */
static void
bgp_rib_remove (struct bgp_node *rn, struct bgp_info *ri, struct peer *peer,
afi_t afi, safi_t safi)
{
- if (! CHECK_FLAG (ri->flags, BGP_INFO_HISTORY))
+ if (!CHECK_FLAG (ri->flags, BGP_INFO_HISTORY)
+ && rn->table->type == BGP_TABLE_MAIN)
{
/* Ignore 'pcount' for RS-client tables */
if ( rn->table->type == BGP_TABLE_MAIN)
{
- peer->pcount[afi][safi]--;
- bgp_aggregate_decrement (peer->bgp, &rn->p, ri, afi, safi);
+ peer->pcount[afi][safi]--;
+ bgp_aggregate_decrement (peer->bgp, &rn->p, ri, afi, safi);
}
- UNSET_FLAG (ri->flags, BGP_INFO_VALID);
- bgp_process (peer->bgp, rn, afi, safi);
}
+ bgp_process (peer->bgp, rn, afi, safi);
bgp_info_delete (rn, ri);
}
static void
bgp_rib_withdraw (struct bgp_node *rn, struct bgp_info *ri, struct peer *peer,
- afi_t afi, safi_t safi, int force)
+ afi_t afi, safi_t safi)
{
int valid;
int status = BGP_DAMP_NONE;
- /* Ignore 'pcount' for RS-client tables */
- if (! CHECK_FLAG (ri->flags, BGP_INFO_HISTORY) &&
- rn->table->type == BGP_TABLE_MAIN)
- {
- if (! CHECK_FLAG (ri->flags, BGP_INFO_STALE))
- peer->pcount[afi][safi]--;
- bgp_aggregate_decrement (peer->bgp, &rn->p, ri, afi, safi);
- }
-
- if (! force)
+ if (!CHECK_FLAG (ri->flags, BGP_INFO_HISTORY)
+ && rn->table->type == BGP_TABLE_MAIN)
{
- if (CHECK_FLAG (peer->bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)
- && peer_sort (peer) == BGP_PEER_EBGP)
- status = bgp_damp_withdraw (ri, rn, afi, safi, 0);
-
- if (status == BGP_DAMP_SUPPRESSED)
- return;
+ /* Ignore 'pcount' for RS-client tables */
+ if ( rn->table->type == BGP_TABLE_MAIN)
+ {
+ peer->pcount[afi][safi]--;
+ bgp_aggregate_decrement (peer->bgp, &rn->p, ri, afi, safi);
+ }
}
+
+ /* apply dampening, if result is suppressed, we'll be retaining
+ * the bgp_info in the RIB for historical reference.
+ */
+ if (CHECK_FLAG (peer->bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)
+ && peer_sort (peer) == BGP_PEER_EBGP)
+ if ( (status = bgp_damp_withdraw (ri, rn, afi, safi, 0))
+ == BGP_DAMP_SUPPRESSED)
+ return;
- valid = CHECK_FLAG (ri->flags, BGP_INFO_VALID);
- UNSET_FLAG (ri->flags, BGP_INFO_VALID);
bgp_process (peer->bgp, rn, afi, safi);
- if (valid)
- SET_FLAG (ri->flags, BGP_INFO_VALID);
-
if (status != BGP_DAMP_USED)
bgp_info_delete (rn, ri);
}
@@ -1743,7 +1771,7 @@ bgp_update_rsclient (struct peer *rsclient, afi_t afi, safi_t safi,
p->prefixlen, rsclient->host, reason);
if (ri)
- bgp_rib_withdraw (rn, ri, peer, afi, safi, 1);
+ bgp_rib_remove (rn, ri, peer, afi, safi);
bgp_unlock_node (rn);
@@ -1771,7 +1799,7 @@ bgp_withdraw_rsclient (struct peer *rsclient, afi_t afi, safi_t safi,
/* Withdraw specified route from routing table. */
if (ri && ! CHECK_FLAG (ri->flags, BGP_INFO_HISTORY))
- bgp_rib_withdraw (rn, ri, peer, afi, safi, 0);
+ bgp_rib_withdraw (rn, ri, peer, afi, safi);
else if (BGP_DEBUG (update, UPDATE_IN))
zlog (peer->log, LOG_DEBUG,
"%s Can't find the route %s/%d", peer->host,
@@ -2086,7 +2114,7 @@ bgp_update_main (struct peer *peer, struct prefix *p, struct attr *attr,
p->prefixlen, reason);
if (ri)
- bgp_rib_withdraw (rn, ri, peer, afi, safi, 1);
+ bgp_rib_remove (rn, ri, peer, afi, safi);
bgp_unlock_node (rn);
@@ -2163,7 +2191,7 @@ bgp_withdraw (struct peer *peer, struct prefix *p, struct attr *attr,
/* Withdraw specified route from routing table. */
if (ri && ! CHECK_FLAG (ri->flags, BGP_INFO_HISTORY))
- bgp_rib_withdraw (rn, ri, peer, afi, safi, 0);
+ bgp_rib_withdraw (rn, ri, peer, afi, safi);
else if (BGP_DEBUG (update, UPDATE_IN))
zlog (peer->log, LOG_DEBUG,
"%s Can't find the route %s/%d", peer->host,
@@ -4996,15 +5024,14 @@ enum bgp_display_type
normal_list,
};
-/* called from terminal list command */
-void
-route_vty_out (struct vty *vty, struct prefix *p,
- struct bgp_info *binfo, int display, safi_t safi)
+/* Print the short form route status for a bgp_info */
+static void
+route_vty_short_status_out (struct vty *vty, struct bgp_info *binfo)
{
- struct attr *attr;
-
- /* Route status display. */
- if (CHECK_FLAG (binfo->flags, BGP_INFO_STALE))
+ /* Route status display. */
+ if (CHECK_FLAG (binfo->flags, BGP_INFO_REMOVED))
+ vty_out (vty, "R");
+ else if (CHECK_FLAG (binfo->flags, BGP_INFO_STALE))
vty_out (vty, "S");
else if (binfo->suppress)
vty_out (vty, "s");
@@ -5027,7 +5054,18 @@ route_vty_out (struct vty *vty, struct prefix *p,
if ((binfo->peer->as) && (binfo->peer->as == binfo->peer->local_as))
vty_out (vty, "i");
else
- vty_out (vty, " ");
+ vty_out (vty, " ");
+}
+
+/* called from terminal list command */
+void
+route_vty_out (struct vty *vty, struct prefix *p,
+ struct bgp_info *binfo, int display, safi_t safi)
+{
+ struct attr *attr;
+
+ /* short status lead text */
+ route_vty_short_status_out (vty, binfo);
/* print prefix and mask */
if (! display)
@@ -5159,30 +5197,9 @@ route_vty_out_tag (struct vty *vty, struct prefix *p,
struct attr *attr;
u_int32_t label = 0;
- /* Route status display. */
- if (binfo->suppress)
- vty_out (vty, "s");
- else if (! CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "*");
- else
- vty_out (vty, " ");
-
- /* Selected */
- if (CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "h");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_DAMPED))
- vty_out (vty, "d");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
- vty_out (vty, ">");
- else
- vty_out (vty, " ");
-
- /* Internal route. */
- if ((binfo->peer->as) && (binfo->peer->as == binfo->peer->local_as))
- vty_out (vty, "i");
- else
- vty_out (vty, " ");
-
+ /* short status lead text */
+ route_vty_short_status_out (vty, binfo);
+
/* print prefix and mask */
if (! display)
route_vty_out_route (p, vty);
@@ -5232,26 +5249,9 @@ damp_route_vty_out (struct vty *vty, struct prefix *p,
struct attr *attr;
int len;
- /* Route status display. */
- if (binfo->suppress)
- vty_out (vty, "s");
- else if (! CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "*");
- else
- vty_out (vty, " ");
-
- /* Selected */
- if (CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "h");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_DAMPED))
- vty_out (vty, "d");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
- vty_out (vty, ">");
- else
- vty_out (vty, " ");
-
- vty_out (vty, " ");
-
+ /* short status lead text */
+ route_vty_short_status_out (vty, binfo);
+
/* print prefix and mask */
if (! display)
route_vty_out_route (p, vty);
@@ -5298,26 +5298,9 @@ flap_route_vty_out (struct vty *vty, struct prefix *p,
bdi = binfo->damp_info;
- /* Route status display. */
- if (binfo->suppress)
- vty_out (vty, "s");
- else if (! CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "*");
- else
- vty_out (vty, " ");
-
- /* Selected */
- if (CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
- vty_out (vty, "h");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_DAMPED))
- vty_out (vty, "d");
- else if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
- vty_out (vty, ">");
- else
- vty_out (vty, " ");
-
- vty_out (vty, " ");
-
+ /* short status lead text */
+ route_vty_short_status_out (vty, binfo);
+
/* print prefix and mask */
if (! display)
route_vty_out_route (p, vty);
@@ -5387,6 +5370,8 @@ route_vty_out_detail (struct vty *vty, struct bgp *bgp, struct prefix *p,
aspath_print_vty (vty, attr->aspath);
}
+ if (CHECK_FLAG (binfo->flags, BGP_INFO_REMOVED))
+ vty_out (vty, ", (removed)");
if (CHECK_FLAG (binfo->flags, BGP_INFO_STALE))
vty_out (vty, ", (stale)");
if (CHECK_FLAG (attr->flag, ATTR_FLAG_BIT (BGP_ATTR_AGGREGATOR)))
@@ -5525,7 +5510,7 @@ route_vty_out_detail (struct vty *vty, struct bgp *bgp, struct prefix *p,
vty_out (vty, "%s", VTY_NEWLINE);
}
-#define BGP_SHOW_SCODE_HEADER "Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,%s r RIB-failure, S Stale%s"
+#define BGP_SHOW_SCODE_HEADER "Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,%s r RIB-failure, S Stale, R Removed%s"
#define BGP_SHOW_OCODE_HEADER "Origin codes: i - IGP, e - EGP, ? - incomplete%s%s"
#define BGP_SHOW_HEADER " Network Next Hop Metric LocPrf Weight Path%s"
#define BGP_SHOW_DAMP_HEADER " Network From Reuse Path%s"
diff --git a/bgpd/bgp_route.h b/bgpd/bgp_route.h
index 8d63e460..aa2c59ec 100644
--- a/bgpd/bgp_route.h
+++ b/bgpd/bgp_route.h
@@ -54,6 +54,7 @@ struct bgp_info
#define BGP_INFO_DMED_CHECK (1 << 6)
#define BGP_INFO_DMED_SELECTED (1 << 7)
#define BGP_INFO_STALE (1 << 8)
+#define BGP_INFO_REMOVED (1 << 9)
/* Peer structure. */
struct peer *peer;
@@ -179,7 +180,6 @@ extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
/* for bgp_nexthop and bgp_damp */
extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
-
extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
extern int bgp_config_write_distance (struct vty *, struct bgp *);
diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
index e2e2b47f..c04d0dc9 100644
--- a/bgpd/bgpd.h
+++ b/bgpd/bgpd.h
@@ -742,7 +742,8 @@ enum bgp_clear_type
#define BGP_INFO_HOLDDOWN(BI) \
(! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
|| CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY) \
- || CHECK_FLAG ((BI)->flags, BGP_INFO_DAMPED))
+ || CHECK_FLAG ((BI)->flags, BGP_INFO_DAMPED) \
+ || CHECK_FLAG ((BI)->flags, BGP_INFO_REMOVED))
/* Count prefix size from mask length */
#define PSIZE(a) (((a) + 7) / (8))
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 18:39:18 +0000