bgpd: peer / peer group dampening profiles

Changes implement dampening profiles for peers and peer groups. This is
achieved by introducing the possibility to have multible existing
dampening configurations with their own sets of parameters and lists of
associated paths.

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
Signed-off-by: David Schweizer <dschweizer@opensourcerouting.org>

1 files changed, 36 insertions, 13 deletions

diff --git a/bgpd/bgp_damp.h b/bgpd/bgp_damp.h
index 604706300..521f59b29 100644
--- a/bgpd/bgp_damp.h
+++ b/bgpd/bgp_damp.h
@@ -25,11 +25,6 @@
 
 /* Structure maintained on a per-route basis. */
 struct bgp_damp_info {
-	/* Doubly linked list.  This information must be linked to
-	   reuse_list or no_reuse_list.  */
-	struct bgp_damp_info *next;
-	struct bgp_damp_info *prev;
-
 	/* Figure-of-merit.  */
 	unsigned int penalty;
 
@@ -45,6 +40,9 @@ struct bgp_damp_info {
 	/* Time of route start to be suppressed.  */
 	time_t suppress_time;
 
+	/* Back reference to associated dampening configuration. */
+	struct bgp_damp_config *config;
+
 	/* Back reference to bgp_path_info. */
 	struct bgp_path_info *path;
 
@@ -53,6 +51,8 @@ struct bgp_damp_info {
 
 	/* Current index in the reuse_list. */
 	int index;
+#define BGP_DAMP_NO_REUSE_LIST_INDEX                                           \
+	(-1) /* index for elements on no_reuse_list */
 
 	/* Last time message type. */
 	uint8_t lastrecord;
@@ -63,6 +63,13 @@ struct bgp_damp_info {
 	safi_t safi;
 };
 
+struct reuselist_node {
+	SLIST_ENTRY(reuselist_node) entry;
+	struct bgp_damp_info *info;
+};
+
+SLIST_HEAD(reuselist, reuselist_node);
+
 /* Specified parameter set configuration. */
 struct bgp_damp_config {
 	/* Value over which routes suppressed.  */
@@ -100,11 +107,11 @@ struct bgp_damp_config {
 	int *reuse_index;
 
 	/* Reuse list array per-set based. */
-	struct bgp_damp_info **reuse_list;
-	int reuse_offset;
+	struct reuselist *reuse_list;
+	unsigned int reuse_offset;
 
 	/* All dampening information which is not on reuse list.  */
-	struct bgp_damp_info *no_reuse_list;
+	struct reuselist no_reuse_list;
 
 	/* Reuse timer thread per-set base. */
 	struct thread *t_reuse;
@@ -132,6 +139,8 @@ struct bgp_damp_config {
 #define REUSE_LIST_SIZE          256
 #define REUSE_ARRAY_SIZE        1024
 
+extern struct bgp_damp_config *get_active_bdc_from_pi(struct bgp_path_info *pi,
+						      afi_t afi, safi_t safi);
 extern int bgp_damp_enable(struct bgp *, afi_t, safi_t, time_t, unsigned int,
 			   unsigned int, time_t);
 extern int bgp_damp_disable(struct bgp *, afi_t, safi_t);
@@ -139,13 +148,18 @@ extern int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest,
 			     afi_t afi, safi_t safi, int attr_change);
 extern int bgp_damp_update(struct bgp_path_info *path, struct bgp_dest *dest,
 			   afi_t afi, safi_t saff);
-extern void bgp_damp_info_free(struct bgp_damp_info *path, int withdraw,
+extern void bgp_damp_info_free(struct bgp_damp_info **path,
+			       struct bgp_damp_config *bdc, int withdraw,
 			       afi_t afi, safi_t safi);
-extern void bgp_damp_info_clean(afi_t afi, safi_t safi);
+extern void bgp_damp_info_clean(struct bgp_damp_config *bdc, afi_t afi,
+				safi_t safi);
+extern void bgp_damp_config_clean(struct bgp_damp_config *bdc);
 extern int bgp_damp_decay(time_t, int, struct bgp_damp_config *damp);
-extern void bgp_config_write_damp(struct vty *, afi_t afi, safi_t safi);
-extern void bgp_damp_info_vty(struct vty *vty, struct bgp_path_info *path,
-			      afi_t afi, safi_t safi, json_object *json_path);
+extern void bgp_config_write_damp(struct vty *vty, struct bgp *bgp, afi_t afi,
+				  safi_t safi);
+extern void bgp_damp_info_vty(struct vty *vty, struct bgp *bgp,
+			      struct bgp_path_info *path, afi_t afi,
+			      safi_t safi, json_object *json_path);
 extern const char *bgp_damp_reuse_time_vty(struct vty *vty,
 					   struct bgp_path_info *path,
 					   char *timebuf, size_t len, afi_t afi,
@@ -153,5 +167,14 @@ extern const char *bgp_damp_reuse_time_vty(struct vty *vty,
 					   json_object *json);
 extern int bgp_show_dampening_parameters(struct vty *vty, afi_t, safi_t,
 					 uint8_t);
+extern void bgp_peer_damp_enable(struct peer *peer, afi_t afi, safi_t safi,
+				 time_t half, unsigned int reuse,
+				 unsigned int suppress, time_t max);
+extern void bgp_peer_damp_disable(struct peer *peer, afi_t afi, safi_t safi);
+extern void bgp_config_write_peer_damp(struct vty *vty, struct peer *peer,
+				       afi_t afi, safi_t safi);
+extern void bgp_show_peer_dampening_parameters(struct vty *vty,
+					       struct peer *peer, afi_t afi,
+					       safi_t safi, bool use_json);
 
 #endif /* _QUAGGA_BGP_DAMP_H */