zebra: add some debugging for PBR events in zebra

Add some debugging for PBR events internal to zebra,
specifically ADD/UPDATE/DELETE of pbr rules.

Signed-off-by: Stephen Worley <sworley@nvidia.com>

zebra/debug.c

@@ -41,6 +41,7 @@ unsigned long zebra_debug_dplane;
 unsigned long zebra_debug_mlag;
 unsigned long zebra_debug_nexthop;
 unsigned long zebra_debug_evpn_mh;
+unsigned long zebra_debug_pbr;
 
 DEFINE_HOOK(zebra_debug_show_debugging, (struct vty *vty), (vty));
 
@@ -122,6 +123,9 @@ DEFUN_NOSH (show_debugging_zebra,
 	if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
 		vty_out(vty, "  Zebra EVPN-MH Neigh debugging is on\n");
 
+	if (IS_ZEBRA_DEBUG_PBR)
+		vty_out(vty, "  Zebra PBR debugging is on\n");
+
 	hook_call(zebra_debug_show_debugging, vty);
 	return CMD_SUCCESS;
 }
@@ -318,6 +322,17 @@ DEFUN (debug_zebra_dplane,
 	return CMD_SUCCESS;
 }
 
+DEFUN (debug_zebra_pbr,
+       debug_zebra_pbr_cmd,
+       "debug zebra pbr",
+       DEBUG_STR
+       "Zebra configuration\n"
+       "Debug zebra pbr events\n")
+{
+	SET_FLAG(zebra_debug_pbr, ZEBRA_DEBUG_PBR);
+	return CMD_SUCCESS;
+}
+
 DEFPY (debug_zebra_mlag,
        debug_zebra_mlag_cmd,
        "[no$no] debug zebra mlag",
@@ -508,6 +523,18 @@ DEFUN (no_debug_zebra_dplane,
 	return CMD_SUCCESS;
 }
 
+DEFUN (no_debug_zebra_pbr,
+       no_debug_zebra_pbr_cmd,
+       "no debug zebra pbr",
+       NO_STR
+       DEBUG_STR
+       "Zebra configuration\n"
+       "Debug zebra pbr events\n")
+{
+	zebra_debug_pbr = 0;
+	return CMD_SUCCESS;
+}
+
 DEFPY (debug_zebra_nexthop,
        debug_zebra_nexthop_cmd,
        "[no$no] debug zebra nexthop [detail$detail]",
@@ -650,6 +677,11 @@ static int config_write_debug(struct vty *vty)
 		write++;
 	}
 
+	if (IS_ZEBRA_DEBUG_PBR) {
+		vty_out(vty, "debug zebra pbr\n");
+		write++;
+	}
+
 	return write;
 }
 
@@ -668,6 +700,7 @@ void zebra_debug_init(void)
 	zebra_debug_evpn_mh = 0;
 	zebra_debug_nht = 0;
 	zebra_debug_nexthop = 0;
+	zebra_debug_pbr = 0;
 
 	install_node(&debug_node);
 
@@ -686,6 +719,7 @@ void zebra_debug_init(void)
 	install_element(ENABLE_NODE, &debug_zebra_dplane_cmd);
 	install_element(ENABLE_NODE, &debug_zebra_mlag_cmd);
 	install_element(ENABLE_NODE, &debug_zebra_nexthop_cmd);
+	install_element(ENABLE_NODE, &debug_zebra_pbr_cmd);
 	install_element(ENABLE_NODE, &no_debug_zebra_events_cmd);
 	install_element(ENABLE_NODE, &no_debug_zebra_nht_cmd);
 	install_element(ENABLE_NODE, &no_debug_zebra_mpls_cmd);
@@ -696,6 +730,7 @@ void zebra_debug_init(void)
 	install_element(ENABLE_NODE, &no_debug_zebra_rib_cmd);
 	install_element(ENABLE_NODE, &no_debug_zebra_fpm_cmd);
 	install_element(ENABLE_NODE, &no_debug_zebra_dplane_cmd);
+	install_element(ENABLE_NODE, &no_debug_zebra_pbr_cmd);
 	install_element(ENABLE_NODE, &debug_zebra_evpn_mh_cmd);
 
 	install_element(CONFIG_NODE, &debug_zebra_events_cmd);
@@ -710,6 +745,8 @@ void zebra_debug_init(void)
 	install_element(CONFIG_NODE, &debug_zebra_fpm_cmd);
 	install_element(CONFIG_NODE, &debug_zebra_dplane_cmd);
 	install_element(CONFIG_NODE, &debug_zebra_nexthop_cmd);
+	install_element(CONFIG_NODE, &debug_zebra_pbr_cmd);
+
 	install_element(CONFIG_NODE, &no_debug_zebra_events_cmd);
 	install_element(CONFIG_NODE, &no_debug_zebra_nht_cmd);
 	install_element(CONFIG_NODE, &no_debug_zebra_mpls_cmd);
@@ -720,6 +757,7 @@ void zebra_debug_init(void)
 	install_element(CONFIG_NODE, &no_debug_zebra_rib_cmd);
 	install_element(CONFIG_NODE, &no_debug_zebra_fpm_cmd);
 	install_element(CONFIG_NODE, &no_debug_zebra_dplane_cmd);
+	install_element(CONFIG_NODE, &no_debug_zebra_pbr_cmd);
 	install_element(CONFIG_NODE, &debug_zebra_mlag_cmd);
 	install_element(CONFIG_NODE, &debug_zebra_evpn_mh_cmd);
 }

zebra/debug.h

@@ -67,6 +67,8 @@ extern "C" {
 #define ZEBRA_DEBUG_EVPN_MH_MAC 0x04
 #define ZEBRA_DEBUG_EVPN_MH_NEIGH 0x08
 
+#define ZEBRA_DEBUG_PBR 0x01
+
 /* Debug related macro. */
 #define IS_ZEBRA_DEBUG_EVENT  (zebra_debug_event & ZEBRA_DEBUG_EVENT)
 
@@ -114,6 +116,8 @@ extern "C" {
 #define IS_ZEBRA_DEBUG_EVPN_MH_NEIGH \
 	(zebra_debug_evpn_mh & ZEBRA_DEBUG_EVPN_MH_NEIGH)
 
+#define IS_ZEBRA_DEBUG_PBR (zebra_debug_pbr & ZEBRA_DEBUG_PBR)
+
 extern unsigned long zebra_debug_event;
 extern unsigned long zebra_debug_packet;
 extern unsigned long zebra_debug_kernel;
@@ -127,6 +131,7 @@ extern unsigned long zebra_debug_dplane;
 extern unsigned long zebra_debug_mlag;
 extern unsigned long zebra_debug_nexthop;
 extern unsigned long zebra_debug_evpn_mh;
+extern unsigned long zebra_debug_pbr;
 
 extern void zebra_debug_init(void);
 

zebra/zebra_pbr.c

@@ -32,6 +32,7 @@
 #include "zebra/zapi_msg.h"
 #include "zebra/zebra_memory.h"
 #include "zebra/zserv.h"
+#include "zebra/debug.h"
 
 /* definitions */
 DEFINE_MTYPE_STATIC(ZEBRA, PBR_IPTABLE_IFNAME, "PBR interface list")
@@ -503,6 +504,12 @@ void zebra_pbr_add_rule(struct zebra_pbr_rule *rule)
 
 	/* If found, this is an update */
 	if (found) {
+		if (IS_ZEBRA_DEBUG_PBR)
+			zlog_debug(
+				"%s: seq: %d, prior: %d, unique: %d, ifname: %s -- update",
+				__func__, rule->rule.seq, rule->rule.priority,
+				rule->rule.unique, rule->rule.ifname);
+
 		(void)dplane_pbr_rule_update(found, rule);
 
 		if (pbr_rule_release(found))
@@ -510,12 +517,24 @@ void zebra_pbr_add_rule(struct zebra_pbr_rule *rule)
 				"%s: Rule being updated we know nothing about",
 				__PRETTY_FUNCTION__);
 
-	} else
+	} else {
+		if (IS_ZEBRA_DEBUG_PBR)
+			zlog_debug(
+				"%s: seq: %d, prior: %d, unique: %d, ifname: %s -- new",
+				__func__, rule->rule.seq, rule->rule.priority,
+				rule->rule.unique, rule->rule.ifname);
+
 		(void)dplane_pbr_rule_add(rule);
+	}
 }
 
 void zebra_pbr_del_rule(struct zebra_pbr_rule *rule)
 {
+	if (IS_ZEBRA_DEBUG_PBR)
+		zlog_debug("%s: seq: %d, prior: %d, unique: %d, ifname: %s",
+			   __func__, rule->rule.seq, rule->rule.priority,
+			   rule->rule.unique, rule->rule.ifname);
+
 	(void)dplane_pbr_rule_delete(rule);
 
 	if (pbr_rule_release(rule))