Merge pull request #17469 from opensourcerouting/msdp-logs

pimd: MSDP logging improvements

pimd/pim_cmd.c

@@ -8267,6 +8267,37 @@ DEFUN (show_ip_msdp_sa_sg_vrf_all,
 	return CMD_SUCCESS;
 }
 
+DEFPY(msdp_log_neighbor_changes, msdp_log_neighbor_changes_cmd,
+      "[no] msdp log neighbor-events",
+      NO_STR
+      MSDP_STR
+      "MSDP log messages\n"
+      "MSDP log neighbor event messages\n")
+{
+	char xpath_value[XPATH_MAXLEN + 32];
+
+	snprintf(xpath_value, sizeof(xpath_value), "%s/msdp/log-neighbor-events", VTY_CURR_XPATH);
+	nb_cli_enqueue_change(vty, xpath_value, no ? NB_OP_DESTROY : NB_OP_MODIFY, "true");
+
+	return nb_cli_apply_changes(vty, NULL);
+}
+
+DEFPY(msdp_log_sa_changes, msdp_log_sa_changes_cmd,
+      "[no] msdp log sa-events",
+      NO_STR
+      MSDP_STR
+      "MSDP log messages\n"
+      "MSDP log SA event messages\n")
+{
+	char xpath_value[XPATH_MAXLEN + 32];
+
+	snprintf(xpath_value, sizeof(xpath_value), "%s/msdp/log-sa-events", VTY_CURR_XPATH);
+	nb_cli_enqueue_change(vty, xpath_value, no ? NB_OP_DESTROY : NB_OP_MODIFY, "true");
+
+	return nb_cli_apply_changes(vty, NULL);
+}
+
+
 struct pim_sg_cache_walk_data {
 	struct vty *vty;
 	json_object *json;
@@ -8898,6 +8929,8 @@ void pim_cmd_init(void)
 	install_element(PIM_NODE, &pim_msdp_mesh_group_source_cmd);
 	install_element(PIM_NODE, &no_pim_msdp_mesh_group_source_cmd);
 	install_element(PIM_NODE, &no_pim_msdp_mesh_group_cmd);
+	install_element(PIM_NODE, &msdp_log_neighbor_changes_cmd);
+	install_element(PIM_NODE, &msdp_log_sa_changes_cmd);
 
 	install_element(PIM_NODE, &pim_bsr_candidate_rp_cmd);
 	install_element(PIM_NODE, &pim_bsr_candidate_rp_group_cmd);

pimd/pim_instance.c

@@ -272,3 +272,13 @@ void pim_vrf_terminate(void)
 
 	vrf_terminate();
 }
+
+bool pim_msdp_log_neighbor_events(const struct pim_instance *pim)
+{
+	return (pim->log_flags & PIM_MSDP_LOG_NEIGHBOR_EVENTS);
+}
+
+bool pim_msdp_log_sa_events(const struct pim_instance *pim)
+{
+	return (pim->log_flags & PIM_MSDP_LOG_SA_EVENTS);
+}

pimd/pim_instance.h

@@ -192,6 +192,13 @@ struct pim_instance {
 
 	uint64_t gm_rx_drop_sys;
 
+	/** Log information flags. */
+	uint32_t log_flags;
+/** Log neighbor event messages. */
+#define PIM_MSDP_LOG_NEIGHBOR_EVENTS 0x01
+/** Log SA event messages. */
+#define PIM_MSDP_LOG_SA_EVENTS 0x02
+
 	bool stopping;
 
 #if PIM_IPV == 6
@@ -218,4 +225,7 @@ extern struct pim_router *router;
 
 struct pim_instance *pim_get_pim_instance(vrf_id_t vrf_id);
 
+extern bool pim_msdp_log_neighbor_events(const struct pim_instance *pim);
+extern bool pim_msdp_log_sa_events(const struct pim_instance *pim);
+
 #endif

pimd/pim_msdp.c

@@ -47,20 +47,13 @@ static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2);
 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr);
 
 /************************ SA cache management ******************************/
-static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa *sa,
-					 const char *timer_str)
-{
-	zlog_debug("MSDP SA %s %s timer expired", sa->sg_str, timer_str);
-}
-
 /* RFC-3618:Sec-5.1 - global active source advertisement timer */
 static void pim_msdp_sa_adv_timer_cb(struct event *t)
 {
 	struct pim_instance *pim = EVENT_ARG(t);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_sa_events(pim))
-		zlog_debug("MSDP SA advertisement timer expired");
+		zlog_info("MSDP SA advertisement timer expired");
-	}
 
 	pim_msdp_sa_adv_timer_setup(pim, true /* start */);
 	pim_msdp_pkt_sa_tx(pim);
@@ -83,9 +76,8 @@ static void pim_msdp_sa_state_timer_cb(struct event *t)
 
 	sa = EVENT_ARG(t);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_sa_events(sa->pim))
-		pim_msdp_sa_timer_expiry_log(sa, "state");
+		zlog_info("MSDP SA %s state timer expired", sa->sg_str);
-	}
 
 	pim_msdp_sa_deref(sa, PIM_MSDP_SAF_PEER);
 }
@@ -120,9 +112,8 @@ static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa)
 		sa->flags &= ~PIM_MSDP_SAF_UP_DEL_IN_PROG;
 	}
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_sa_events(sa->pim))
-		zlog_debug("MSDP SA %s de-referenced SPT", sa->sg_str);
+		zlog_info("MSDP SA %s de-referenced SPT", sa->sg_str);
-	}
 }
 
 static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa *sa,
@@ -185,10 +176,8 @@ static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa,
 	if (up && (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags))) {
 		/* somehow we lost track of the upstream ptr? best log it */
 		sa->up = up;
-		if (PIM_DEBUG_MSDP_EVENTS) {
+		if (pim_msdp_log_sa_events(sa->pim))
-			zlog_debug("MSDP SA %s SPT reference missing",
+			zlog_info("MSDP SA %s SPT reference missing", sa->sg_str);
-				   sa->sg_str);
-		}
 		return;
 	}
 
@@ -204,14 +193,11 @@ static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa,
 		/* should we also start the kat in parallel? we will need it
 		 * when the
 		 * SA ages out */
-		if (PIM_DEBUG_MSDP_EVENTS) {
+		if (pim_msdp_log_sa_events(sa->pim))
-			zlog_debug("MSDP SA %s referenced SPT", sa->sg_str);
+			zlog_info("MSDP SA %s referenced SPT", sa->sg_str);
-		}
 	} else {
-		if (PIM_DEBUG_MSDP_EVENTS) {
+		if (pim_msdp_log_sa_events(sa->pim))
-			zlog_debug("MSDP SA %s SPT reference failed",
+			zlog_info("MSDP SA %s SPT reference failed", sa->sg_str);
-				   sa->sg_str);
-		}
 	}
 }
 
@@ -240,9 +226,8 @@ static struct pim_msdp_sa *pim_msdp_sa_new(struct pim_instance *pim,
 	sa = hash_get(pim->msdp.sa_hash, sa, hash_alloc_intern);
 	listnode_add_sort(pim->msdp.sa_list, sa);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_sa_events(pim))
-		zlog_debug("MSDP SA %s created", sa->sg_str);
+		zlog_info("MSDP SA %s created", sa->sg_str);
-	}
 
 	return sa;
 }
@@ -282,9 +267,8 @@ static void pim_msdp_sa_del(struct pim_msdp_sa *sa)
 	listnode_delete(sa->pim->msdp.sa_list, sa);
 	hash_release(sa->pim->msdp.sa_hash, sa);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_sa_events(sa->pim))
-		zlog_debug("MSDP SA %s deleted", sa->sg_str);
+		zlog_info("MSDP SA %s deleted", sa->sg_str);
-	}
 
 	/* free up any associated memory */
 	pim_msdp_sa_free(sa);
@@ -333,10 +317,9 @@ static void pim_msdp_sa_deref(struct pim_msdp_sa *sa,
 
 	if ((sa->flags & PIM_MSDP_SAF_LOCAL)) {
 		if (flags & PIM_MSDP_SAF_LOCAL) {
-			if (PIM_DEBUG_MSDP_EVENTS) {
+			if (pim_msdp_log_sa_events(sa->pim))
-				zlog_debug("MSDP SA %s local reference removed",
+				zlog_info("MSDP SA %s local reference removed", sa->sg_str);
-					   sa->sg_str);
+
-			}
 			if (sa->pim->msdp.local_cnt)
 				--sa->pim->msdp.local_cnt;
 		}
@@ -346,10 +329,9 @@ static void pim_msdp_sa_deref(struct pim_msdp_sa *sa,
 		if (flags & PIM_MSDP_SAF_PEER) {
 			struct in_addr rp;
 
-			if (PIM_DEBUG_MSDP_EVENTS) {
+			if (pim_msdp_log_sa_events(sa->pim))
-				zlog_debug("MSDP SA %s peer reference removed",
+				zlog_info("MSDP SA %s peer reference removed", sa->sg_str);
-					   sa->sg_str);
+
-			}
 			pim_msdp_sa_state_timer_setup(sa, false /* start */);
 			rp.s_addr = INADDR_ANY;
 			pim_msdp_sa_peer_ip_set(sa, NULL /* mp */, rp);
@@ -386,10 +368,8 @@ void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp,
 	if (mp) {
 		if (!(sa->flags & PIM_MSDP_SAF_PEER)) {
 			sa->flags |= PIM_MSDP_SAF_PEER;
-			if (PIM_DEBUG_MSDP_EVENTS) {
+			if (pim_msdp_log_sa_events(pim))
-				zlog_debug("MSDP SA %s added by peer",
+				zlog_info("MSDP SA %s added by peer", sa->sg_str);
-					   sa->sg_str);
-			}
 		}
 		pim_msdp_sa_peer_ip_set(sa, mp, rp);
 		/* start/re-start the state timer to prevent cache expiry */
@@ -403,10 +383,9 @@ void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp,
 		if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) {
 			sa->flags |= PIM_MSDP_SAF_LOCAL;
 			++sa->pim->msdp.local_cnt;
-			if (PIM_DEBUG_MSDP_EVENTS) {
+			if (pim_msdp_log_sa_events(pim))
-				zlog_debug("MSDP SA %s added locally",
+				zlog_info("MSDP SA %s added locally", sa->sg_str);
-					   sa->sg_str);
+
-			}
 			/* send an immediate SA update to peers */
 			pim_addr_to_prefix(&grp, sa->sg.grp);
 			rp_info = pim_rp_find_match_group(pim, &grp);
@@ -710,6 +689,9 @@ bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp)
 		return true;
 	}
 
+	if (pim_msdp_log_sa_events(mp->pim))
+		zlog_info("MSDP peer %pI4 RPF failure for %pI4", &mp->peer, &rp);
+
 	return false;
 }
 
@@ -744,7 +726,7 @@ static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp)
 	char state_str[PIM_MSDP_STATE_STRLEN];
 
 	pim_msdp_state_dump(mp->state, state_str, sizeof(state_str));
-	zlog_debug("MSDP peer %s state chg to %s", mp->key_str, state_str);
+	zlog_info("MSDP peer %s state changed to %s", mp->key_str, state_str);
 }
 
 /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */
@@ -753,9 +735,8 @@ static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp)
 static void pim_msdp_peer_connect(struct pim_msdp_peer *mp)
 {
 	mp->state = PIM_MSDP_CONNECTING;
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
 		pim_msdp_peer_state_chg_log(mp);
-	}
 
 	pim_msdp_peer_cr_timer_setup(mp, true /* start */);
 }
@@ -764,9 +745,8 @@ static void pim_msdp_peer_connect(struct pim_msdp_peer *mp)
 static void pim_msdp_peer_listen(struct pim_msdp_peer *mp)
 {
 	mp->state = PIM_MSDP_LISTEN;
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
 		pim_msdp_peer_state_chg_log(mp);
-	}
 
 	/* this is interntionally asymmetric i.e. we set up listen-socket when
 	* the
@@ -790,9 +770,8 @@ void pim_msdp_peer_established(struct pim_msdp_peer *mp)
 	mp->state = PIM_MSDP_ESTABLISHED;
 	mp->uptime = pim_time_monotonic_sec();
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
 		pim_msdp_peer_state_chg_log(mp);
-	}
 
 	/* stop retry timer on active peers */
 	pim_msdp_peer_cr_timer_setup(mp, false /* start */);
@@ -816,9 +795,9 @@ void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state)
 			++mp->est_flaps;
 		}
 		mp->state = PIM_MSDP_INACTIVE;
-		if (PIM_DEBUG_MSDP_EVENTS) {
+
+		if (pim_msdp_log_neighbor_events(mp->pim))
 			pim_msdp_peer_state_chg_log(mp);
-		}
 	}
 
 	if (PIM_DEBUG_MSDP_INTERNAL) {
@@ -851,10 +830,10 @@ void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state)
 /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */
 void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str)
 {
-	if (PIM_DEBUG_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
-		zlog_debug("MSDP peer %s tcp reset %s", mp->key_str, rc_str);
+		zlog_info("MSDP peer %s tcp reset %s", mp->key_str, rc_str);
-		snprintf(mp->last_reset, sizeof(mp->last_reset), "%s", rc_str);
+
-	}
+	snprintf(mp->last_reset, sizeof(mp->last_reset), "%s", rc_str);
 
 	/* close the connection and transition to listening or connecting */
 	pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */);
@@ -865,12 +844,6 @@ void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str)
 	}
 }
 
-static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer *mp,
-					   const char *timer_str)
-{
-	zlog_debug("MSDP peer %s %s timer expired", mp->key_str, timer_str);
-}
-
 /* RFC-3618:Sec-5.4 - peer hold timer */
 static void pim_msdp_peer_hold_timer_cb(struct event *t)
 {
@@ -878,17 +851,16 @@ static void pim_msdp_peer_hold_timer_cb(struct event *t)
 
 	mp = EVENT_ARG(t);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
-		pim_msdp_peer_timer_expiry_log(mp, "hold");
+		zlog_info("MSDP peer %s hold timer expired", mp->key_str);
-	}
 
 	if (mp->state != PIM_MSDP_ESTABLISHED) {
 		return;
 	}
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
 		pim_msdp_peer_state_chg_log(mp);
-	}
+
 	pim_msdp_peer_reset_tcp_conn(mp, "ht-expired");
 }
 
@@ -910,9 +882,8 @@ static void pim_msdp_peer_ka_timer_cb(struct event *t)
 
 	mp = EVENT_ARG(t);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
-		pim_msdp_peer_timer_expiry_log(mp, "ka");
+		zlog_info("MSDP peer %s keep alive timer expired", mp->key_str);
-	}
 
 	pim_msdp_pkt_ka_tx(mp);
 	pim_msdp_peer_ka_timer_setup(mp, true /* start */);
@@ -970,9 +941,8 @@ static void pim_msdp_peer_cr_timer_cb(struct event *t)
 
 	mp = EVENT_ARG(t);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mp->pim))
-		pim_msdp_peer_timer_expiry_log(mp, "connect-retry");
+		zlog_info("MSDP peer %s connection retry timer expired", mp->key_str);
-	}
 
 	if (mp->state != PIM_MSDP_CONNECTING || PIM_MSDP_PEER_IS_LISTENER(mp)) {
 		return;
@@ -1051,8 +1021,8 @@ struct pim_msdp_peer *pim_msdp_peer_add(struct pim_instance *pim,
 	mp = hash_get(pim->msdp.peer_hash, mp, hash_alloc_intern);
 	listnode_add_sort(pim->msdp.peer_list, mp);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(pim)) {
-		zlog_debug("MSDP peer %s created", mp->key_str);
+		zlog_info("MSDP peer %s created", mp->key_str);
 
 		pim_msdp_peer_state_chg_log(mp);
 	}
@@ -1116,9 +1086,8 @@ void pim_msdp_peer_del(struct pim_msdp_peer **mp)
 	listnode_delete((*mp)->pim->msdp.peer_list, *mp);
 	hash_release((*mp)->pim->msdp.peer_hash, *mp);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events((*mp)->pim))
-		zlog_debug("MSDP peer %s deleted", (*mp)->key_str);
+		zlog_info("MSDP peer %s deleted", (*mp)->key_str);
-	}
 
 	/* free up any associated memory */
 	pim_msdp_peer_free(*mp);
@@ -1193,10 +1162,8 @@ void pim_msdp_mg_free(struct pim_instance *pim, struct pim_msdp_mg **mgp)
 	for (ALL_LIST_ELEMENTS((*mgp)->mbr_list, n, nn, mbr))
 		pim_msdp_mg_mbr_del((*mgp), mbr);
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(pim))
-		zlog_debug("MSDP mesh-group %s deleted",
+		zlog_info("MSDP mesh-group %s deleted", (*mgp)->mesh_group_name);
-			   (*mgp)->mesh_group_name);
-	}
 
 	XFREE(MTYPE_PIM_MSDP_MG_NAME, (*mgp)->mesh_group_name);
 
@@ -1213,15 +1180,14 @@ struct pim_msdp_mg *pim_msdp_mg_new(struct pim_instance *pim,
 	struct pim_msdp_mg *mg;
 
 	mg = XCALLOC(MTYPE_PIM_MSDP_MG, sizeof(*mg));
-
+	mg->pim = pim;
 	mg->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name);
 	mg->mbr_list = list_new();
 	mg->mbr_list->del = (void (*)(void *))pim_msdp_mg_mbr_free;
 	mg->mbr_list->cmp = (int (*)(void *, void *))pim_msdp_mg_mbr_comp;
 
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(pim))
-		zlog_debug("MSDP mesh-group %s created", mg->mesh_group_name);
+		zlog_info("MSDP mesh-group %s created", mg->mesh_group_name);
-	}
 
 	SLIST_INSERT_HEAD(&pim->msdp.mglist, mg, mg_entry);
 
@@ -1255,12 +1221,10 @@ void pim_msdp_mg_mbr_del(struct pim_msdp_mg *mg, struct pim_msdp_mg_mbr *mbr)
 	}
 
 	listnode_delete(mg->mbr_list, mbr);
-	if (PIM_DEBUG_MSDP_EVENTS) {
+	if (pim_msdp_log_neighbor_events(mg->pim))
-		char ip_str[INET_ADDRSTRLEN];
+		zlog_info("MSDP mesh-group %s neighbor %pI4 deleted", mg->mesh_group_name,
-		pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str));
+			  &mbr->mbr_ip);
-		zlog_debug("MSDP mesh-group %s mbr %s deleted",
+
-			   mg->mesh_group_name, ip_str);
-	}
 	pim_msdp_mg_mbr_free(mbr);
 	if (mg->mbr_cnt) {
 		--mg->mbr_cnt;
@@ -1277,10 +1241,9 @@ static void pim_msdp_src_del(struct pim_msdp_mg *mg)
 		if (mbr->mp)
 			pim_msdp_peer_del(&mbr->mp);
 	}
-	if (PIM_DEBUG_MSDP_EVENTS) {
+
-		zlog_debug("MSDP mesh-group %s src cleared",
+	if (pim_msdp_log_neighbor_events(mg->pim))
-			   mg->mesh_group_name);
+		zlog_info("MSDP mesh-group %s source cleared", mg->mesh_group_name);
-	}
 }
 
 /*********************** MSDP feature APIs *********************************/
@@ -1292,6 +1255,11 @@ int pim_msdp_config_write(struct pim_instance *pim, struct vty *vty)
 	char src_str[INET_ADDRSTRLEN];
 	int count = 0;
 
+	if (pim_msdp_log_neighbor_events(pim))
+		vty_out(vty, " msdp log neighbor-events\n");
+	if (pim_msdp_log_sa_events(pim))
+		vty_out(vty, " msdp log sa-events\n");
+
 	if (SLIST_EMPTY(&pim->msdp.mglist))
 		return count;
 
@@ -1426,9 +1394,8 @@ void pim_msdp_mg_src_add(struct pim_instance *pim, struct pim_msdp_mg *mg,
 
 	/* No new address, disable everyone. */
 	if (ai->s_addr == INADDR_ANY) {
-		if (PIM_DEBUG_MSDP_EVENTS)
+		if (pim_msdp_log_neighbor_events(pim))
-			zlog_debug("MSDP mesh-group %s src unset",
+			zlog_info("MSDP mesh-group %s source unset", mg->mesh_group_name);
-				   mg->mesh_group_name);
 		return;
 	}
 
@@ -1437,9 +1404,8 @@ void pim_msdp_mg_src_add(struct pim_instance *pim, struct pim_msdp_mg *mg,
 		mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip,
 					    mg->mesh_group_name);
 
-	if (PIM_DEBUG_MSDP_EVENTS)
+	if (pim_msdp_log_neighbor_events(pim))
-		zlog_debug("MSDP mesh-group %s src %pI4 set",
+		zlog_info("MSDP mesh-group %s source %pI4 set", mg->mesh_group_name, &mg->src_ip);
-			   mg->mesh_group_name, &mg->src_ip);
 }
 
 struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_add(struct pim_instance *pim,
@@ -1457,9 +1423,9 @@ struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_add(struct pim_instance *pim,
 		mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip,
 					    mg->mesh_group_name);
 
-	if (PIM_DEBUG_MSDP_EVENTS)
+	if (pim_msdp_log_neighbor_events(pim))
-		zlog_debug("MSDP mesh-group %s mbr %pI4 created",
+		zlog_info("MSDP mesh-group %s neighbor %pI4 created", mg->mesh_group_name,
-			   mg->mesh_group_name, &mbr->mbr_ip);
+			  &mbr->mbr_ip);
 
 	++mg->mbr_cnt;
 

pimd/pim_msdp.h

@@ -165,6 +165,7 @@ struct pim_msdp_mg {
 	struct in_addr src_ip;
 	uint32_t mbr_cnt;
 	struct list *mbr_list;
+	struct pim_instance *pim;
 
 	/** Belongs to PIM instance list. */
 	SLIST_ENTRY(pim_msdp_mg) mg_entry;

pimd/pim_msdp_packet.c

@@ -487,9 +487,8 @@ static void pim_msdp_pkt_sa_gen(struct pim_instance *pim,
 		}
 
 		if (msdp_peer_sa_filter(mp, sa)) {
-			if (PIM_DEBUG_MSDP_EVENTS)
+			if (pim_msdp_log_sa_events(pim))
-				zlog_debug("MSDP peer %pI4 filter SA out %s",
+				zlog_info("MSDP peer %pI4 filter SA out %s", &mp->peer, sa->sg_str);
-					   &mp->peer, sa->sg_str);
 
 			continue;
 		}
@@ -551,9 +550,9 @@ void pim_msdp_pkt_sa_tx_one(struct pim_msdp_sa *sa)
 	pim_msdp_pkt_sa_fill_one(sa);
 	for (ALL_LIST_ELEMENTS_RO(sa->pim->msdp.peer_list, node, mp)) {
 		if (msdp_peer_sa_filter(mp, sa)) {
-			if (PIM_DEBUG_MSDP_EVENTS)
+			if (pim_msdp_log_sa_events(sa->pim))
-				zlog_debug("MSDP peer %pI4 filter SA out %s",
+				zlog_info("MSDP peer %pI4 filter SA out %s", &mp->peer, sa->sg_str);
-					   &mp->peer, sa->sg_str);
+
 			continue;
 		}
 
@@ -583,9 +582,10 @@ void pim_msdp_pkt_sa_tx_one_to_one_peer(struct pim_msdp_peer *mp,
 
 	/* Don't push it if filtered. */
 	if (msdp_peer_sa_filter(mp, &sa)) {
-		if (PIM_DEBUG_MSDP_EVENTS)
+		if (pim_msdp_log_sa_events(mp->pim))
-			zlog_debug("MSDP peer %pI4 filter SA out (%pI4, %pI4)",
+			zlog_info("MSDP peer %pI4 filter SA out (%pI4, %pI4)", &mp->peer,
-				   &mp->peer, &sa.sg.src, &sa.sg.grp);
+				  &sa.sg.src, &sa.sg.grp);
+
 		return;
 	}
 
@@ -641,11 +641,10 @@ static void pim_msdp_pkt_sa_rx_one(struct pim_msdp_peer *mp, struct in_addr rp)
 	/* Filter incoming SA with configured access list. */
 	if (mp->acl_in) {
 		acl = access_list_lookup(AFI_IP, mp->acl_in);
-		if (msdp_access_list_apply(acl, &sg.src, &sg.grp) ==
+		if (msdp_access_list_apply(acl, &sg.src, &sg.grp) == FILTER_DENY) {
-		    FILTER_DENY) {
+			if (pim_msdp_log_sa_events(mp->pim))
-			if (PIM_DEBUG_MSDP_EVENTS)
+				zlog_info("MSDP peer %pI4 filter SA in (%pI4, %pI4)", &mp->peer,
-				zlog_debug("MSDP peer %pI4 filter SA in (%pI4, %pI4)",
+					  &sg.src, &sg.grp);
-					   &mp->peer, &sg.src, &sg.grp);
 			return;
 		}
 	}

pimd/pim_nb.c

@@ -129,6 +129,18 @@ const struct frr_yang_module_info frr_pim_info = {
 				.modify = pim_msdp_connection_retry_modify,
 			}
 		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/log-neighbor-events",
+			.cbs = {
+				.modify = pim_msdp_log_neighbor_events_modify,
+			}
+		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/log-sa-events",
+			.cbs = {
+				.modify = pim_msdp_log_sa_events_modify,
+			}
+		},
 		{
 			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-groups",
 			.cbs = {

pimd/pim_nb.h

@@ -54,6 +54,8 @@ int routing_control_plane_protocols_control_plane_protocol_pim_address_family_ss
 int pim_msdp_hold_time_modify(struct nb_cb_modify_args *args);
 int pim_msdp_keep_alive_modify(struct nb_cb_modify_args *args);
 int pim_msdp_connection_retry_modify(struct nb_cb_modify_args *args);
+int pim_msdp_log_neighbor_events_modify(struct nb_cb_modify_args *args);
+int pim_msdp_log_sa_events_modify(struct nb_cb_modify_args *args);
 int pim_msdp_mesh_group_create(struct nb_cb_create_args *args);
 int pim_msdp_mesh_group_destroy(struct nb_cb_destroy_args *args);
 int pim_msdp_mesh_group_members_create(struct nb_cb_create_args *args);

pimd/pim_nb_config.c

@@ -1064,8 +1064,68 @@ pim6_msdp_err(routing_control_plane_protocols_control_plane_protocol_pim_address
 pim6_msdp_err(pim_msdp_peer_authentication_type_modify, nb_cb_modify_args);
 pim6_msdp_err(pim_msdp_peer_authentication_key_modify, nb_cb_modify_args);
 pim6_msdp_err(pim_msdp_peer_authentication_key_destroy, nb_cb_destroy_args);
+pim6_msdp_err(pim_msdp_log_neighbor_events_modify, nb_cb_modify_args);
+pim6_msdp_err(pim_msdp_log_sa_events_modify, nb_cb_modify_args);
 
 #if PIM_IPV != 6
+/*
+ * XPath:
+ * /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/log-neighbor-events
+ */
+int pim_msdp_log_neighbor_events_modify(struct nb_cb_modify_args *args)
+{
+	struct pim_instance *pim;
+	struct vrf *vrf;
+
+	switch (args->event) {
+	case NB_EV_VALIDATE:
+	case NB_EV_PREPARE:
+	case NB_EV_ABORT:
+		/* NOTHING */
+		break;
+
+	case NB_EV_APPLY:
+		vrf = nb_running_get_entry(args->dnode, NULL, true);
+		pim = vrf->info;
+		if (yang_dnode_get_bool(args->dnode, NULL))
+			SET_FLAG(pim->log_flags, PIM_MSDP_LOG_NEIGHBOR_EVENTS);
+		else
+			UNSET_FLAG(pim->log_flags, PIM_MSDP_LOG_NEIGHBOR_EVENTS);
+		break;
+	}
+
+	return NB_OK;
+}
+
+/*
+ * XPath:
+ * /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/log-sa-events
+ */
+int pim_msdp_log_sa_events_modify(struct nb_cb_modify_args *args)
+{
+	struct pim_instance *pim;
+	struct vrf *vrf;
+
+	switch (args->event) {
+	case NB_EV_VALIDATE:
+	case NB_EV_PREPARE:
+	case NB_EV_ABORT:
+		/* NOTHING */
+		break;
+
+	case NB_EV_APPLY:
+		vrf = nb_running_get_entry(args->dnode, NULL, true);
+		pim = vrf->info;
+		if (yang_dnode_get_bool(args->dnode, NULL))
+			SET_FLAG(pim->log_flags, PIM_MSDP_LOG_SA_EVENTS);
+		else
+			UNSET_FLAG(pim->log_flags, PIM_MSDP_LOG_SA_EVENTS);
+		break;
+	}
+
+	return NB_OK;
+}
+
 /*
  * XPath:
  * /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-groups

tests/topotests/msdp_topo1/r1/pimd.conf

@@ -22,5 +22,7 @@ ip pim rp 10.254.254.1
 ip pim join-prune-interval 5
 !
 router pim
+ msdp log neighbor-events
+ msdp log sa-events
  msdp peer 192.168.0.2 password 1234
 !

tests/topotests/msdp_topo1/test_msdp_topo1.py

@@ -17,6 +17,7 @@ import os
 import sys
 import json
 from functools import partial
+import re
 import pytest
 
 # Save the Current Working Directory to find configuration files.
@@ -510,6 +511,25 @@ def test_msdp_sa_filter():
     assert val is None, "multicast route convergence failure"
 
 
+def test_msdp_log_events():
+    "Test that the enabled logs are working as expected."
+
+    tgen = get_topogen()
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    r1_log = tgen.gears["r1"].net.getLog("log", "pimd")
+
+    # Look up for informational messages that should have been enabled.
+    match = re.search(
+        "MSDP peer 192.168.1.2 state changed to established", r1_log)
+    assert match is not None
+
+    match = re.search(
+        r"MSDP SA \(192.168.10.100\,229.1.2.3\) created", r1_log)
+    assert match is not None
+
+
 def test_memory_leak():
     "Run the memory leak test and report results."
     tgen = get_topogen()

yang/frr-pim.yang

@@ -250,6 +250,20 @@ module frr-pim {
     container msdp {
       description "Global MSDP configuration.";
       uses msdp-timers;
+
+      leaf log-neighbor-events {
+        type boolean;
+        default false;
+        description
+          "Log all MSDP neighbor related events.";
+      }
+
+      leaf log-sa-events {
+        type boolean;
+        default false;
+        description
+          "Log all MSDP SA related events.";
+      }
     }
 
     list msdp-mesh-groups {