Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3449 insertions, 0 deletions

diff --git a/lib/routemap.c b/lib/routemap.c
new file mode 100644
index 0000000..e0b0eb7
--- /dev/null
+++ b/lib/routemap.c
@@ -0,0 +1,3449 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Route map function.
+ * Copyright (C) 1998, 1999 Kunihiro Ishiguro
+ */
+
+#include <zebra.h>
+
+#include "linklist.h"
+#include "memory.h"
+#include "command.h"
+#include "vector.h"
+#include "prefix.h"
+#include "vty.h"
+#include "routemap.h"
+#include "command.h"
+#include "log.h"
+#include "hash.h"
+#include "libfrr.h"
+#include "lib_errors.h"
+#include "table.h"
+#include "json.h"
+#include "jhash.h"
+
+#include "lib/routemap_clippy.c"
+
+DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP, "Route map");
+DEFINE_MTYPE(LIB, ROUTE_MAP_NAME, "Route map name");
+DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP_INDEX, "Route map index");
+DEFINE_MTYPE(LIB, ROUTE_MAP_RULE, "Route map rule");
+DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP_RULE_STR, "Route map rule str");
+DEFINE_MTYPE(LIB, ROUTE_MAP_COMPILED, "Route map compiled");
+DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP_DEP, "Route map dependency");
+DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP_DEP_DATA, "Route map dependency data");
+
+DEFINE_QOBJ_TYPE(route_map_index);
+DEFINE_QOBJ_TYPE(route_map);
+
+static int rmap_cmd_name_cmp(const struct route_map_rule_cmd_proxy *a,
+			     const struct route_map_rule_cmd_proxy *b)
+{
+	return strcmp(a->cmd->str, b->cmd->str);
+}
+
+static uint32_t rmap_cmd_name_hash(const struct route_map_rule_cmd_proxy *item)
+{
+	return jhash(item->cmd->str, strlen(item->cmd->str), 0xbfd69320);
+}
+
+DECLARE_HASH(rmap_cmd_name, struct route_map_rule_cmd_proxy, itm,
+	     rmap_cmd_name_cmp, rmap_cmd_name_hash);
+
+static struct rmap_cmd_name_head rmap_match_cmds[1] = {
+	INIT_HASH(rmap_match_cmds[0]),
+};
+static struct rmap_cmd_name_head rmap_set_cmds[1] = {
+	INIT_HASH(rmap_set_cmds[0]),
+};
+
+#define IPv4_PREFIX_LIST "ip address prefix-list"
+#define IPv6_PREFIX_LIST "ipv6 address prefix-list"
+
+#define IS_RULE_IPv4_PREFIX_LIST(S)                                            \
+	(strncmp(S, IPv4_PREFIX_LIST, strlen(IPv4_PREFIX_LIST)) == 0)
+#define IS_RULE_IPv6_PREFIX_LIST(S)                                            \
+	(strncmp(S, IPv6_PREFIX_LIST, strlen(IPv6_PREFIX_LIST)) == 0)
+
+struct route_map_pentry_dep {
+	struct prefix_list_entry *pentry;
+	const char *plist_name;
+	route_map_event_t event;
+};
+
+static void route_map_pfx_tbl_update(route_map_event_t event,
+				     struct route_map_index *index, afi_t afi,
+				     const char *plist_name);
+static void route_map_pfx_table_add_default(afi_t afi,
+					    struct route_map_index *index);
+static void route_map_pfx_table_del_default(afi_t afi,
+					    struct route_map_index *index);
+static void route_map_add_plist_entries(afi_t afi,
+					struct route_map_index *index,
+					const char *plist_name,
+					struct prefix_list_entry *entry);
+static void route_map_del_plist_entries(afi_t afi,
+					struct route_map_index *index,
+					const char *plist_name,
+					struct prefix_list_entry *entry);
+
+static struct hash *route_map_get_dep_hash(route_map_event_t event);
+static void route_map_free_map(struct route_map *map);
+
+struct route_map_match_set_hooks rmap_match_set_hook;
+
+/* match interface */
+void route_map_match_interface_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_interface = func;
+}
+
+/* no match interface */
+void route_map_no_match_interface_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_interface = func;
+}
+
+/* match ip address */
+void route_map_match_ip_address_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ip_address = func;
+}
+
+/* no match ip address */
+void route_map_no_match_ip_address_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ip_address = func;
+}
+
+/* match ip address prefix list */
+void route_map_match_ip_address_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ip_address_prefix_list = func;
+}
+
+/* no match ip address prefix list */
+void route_map_no_match_ip_address_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ip_address_prefix_list = func;
+}
+
+/* match ip next hop */
+void route_map_match_ip_next_hop_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ip_next_hop = func;
+}
+
+/* no match ip next hop */
+void route_map_no_match_ip_next_hop_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ip_next_hop = func;
+}
+
+/* match ipv6 next-hop */
+void route_map_match_ipv6_next_hop_hook(int (*func)(
+	struct route_map_index *index, const char *command, const char *arg,
+	route_map_event_t type, char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ipv6_next_hop = func;
+}
+
+/* no match ipv6 next-hop */
+void route_map_no_match_ipv6_next_hop_hook(int (*func)(
+	struct route_map_index *index, const char *command, const char *arg,
+	route_map_event_t type, char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ipv6_next_hop = func;
+}
+
+/* match ip next hop prefix list */
+void route_map_match_ip_next_hop_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ip_next_hop_prefix_list = func;
+}
+
+/* no match ip next hop prefix list */
+void route_map_no_match_ip_next_hop_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ip_next_hop_prefix_list = func;
+}
+
+/* match ip next-hop type */
+void route_map_match_ip_next_hop_type_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ip_next_hop_type = func;
+}
+
+/* no match ip next-hop type */
+void route_map_no_match_ip_next_hop_type_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ip_next_hop_type = func;
+}
+
+/* match ipv6 address */
+void route_map_match_ipv6_address_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ipv6_address = func;
+}
+
+/* no match ipv6 address */
+void route_map_no_match_ipv6_address_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ipv6_address = func;
+}
+
+
+/* match ipv6 address prefix list */
+void route_map_match_ipv6_address_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ipv6_address_prefix_list = func;
+}
+
+/* no match ipv6 address prefix list */
+void route_map_no_match_ipv6_address_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ipv6_address_prefix_list = func;
+}
+
+/* match ipv6 next-hop type */
+void route_map_match_ipv6_next_hop_type_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ipv6_next_hop_type = func;
+}
+
+/* no match ipv6 next-hop type */
+void route_map_no_match_ipv6_next_hop_type_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ipv6_next_hop_type = func;
+}
+
+/* match ipv6 next-hop prefix-list */
+void route_map_match_ipv6_next_hop_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command, const char *arg,
+	route_map_event_t type, char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_ipv6_next_hop_prefix_list = func;
+}
+
+/* no match ipv6 next-hop prefix-list */
+void route_map_no_match_ipv6_next_hop_prefix_list_hook(int (*func)(
+	struct route_map_index *index, const char *command, const char *arg,
+	route_map_event_t type, char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_ipv6_next_hop_prefix_list = func;
+}
+
+/* match metric */
+void route_map_match_metric_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_metric = func;
+}
+
+/* no match metric */
+void route_map_no_match_metric_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_metric = func;
+}
+
+/* match tag */
+void route_map_match_tag_hook(int (*func)(struct route_map_index *index,
+					  const char *command, const char *arg,
+					  route_map_event_t type,
+					  char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.match_tag = func;
+}
+
+/* no match tag */
+void route_map_no_match_tag_hook(int (*func)(
+	struct route_map_index *index, const char *command,
+	const char *arg, route_map_event_t type,
+	char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_match_tag = func;
+}
+
+/* set sr-te color */
+void route_map_set_srte_color_hook(int (*func)(struct route_map_index *index,
+					       const char *command,
+					       const char *arg,
+					       char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.set_srte_color = func;
+}
+
+/* no set sr-te color */
+void route_map_no_set_srte_color_hook(int (*func)(struct route_map_index *index,
+						  const char *command,
+						  const char *arg,
+						  char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_srte_color = func;
+}
+
+/* set ip nexthop */
+void route_map_set_ip_nexthop_hook(int (*func)(struct route_map_index *index,
+					       const char *command,
+					       const char *arg,
+					       char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.set_ip_nexthop = func;
+}
+
+/* no set ip nexthop */
+void route_map_no_set_ip_nexthop_hook(int (*func)(struct route_map_index *index,
+						  const char *command,
+						  const char *arg,
+						  char *errmsg,
+						  size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_ip_nexthop = func;
+}
+
+/* set ipv6 nexthop local */
+void route_map_set_ipv6_nexthop_local_hook(
+	int (*func)(struct route_map_index *index,
+		    const char *command, const char *arg,
+		    char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.set_ipv6_nexthop_local = func;
+}
+
+/* no set ipv6 nexthop local */
+void route_map_no_set_ipv6_nexthop_local_hook(
+	int (*func)(struct route_map_index *index,
+		    const char *command, const char *arg,
+		    char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_ipv6_nexthop_local = func;
+}
+
+/* set metric */
+void route_map_set_metric_hook(int (*func)(struct route_map_index *index,
+					   const char *command,
+					   const char *arg,
+					   char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.set_metric = func;
+}
+
+/* no set metric */
+void route_map_no_set_metric_hook(int (*func)(struct route_map_index *index,
+					      const char *command,
+					      const char *arg,
+					      char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_metric = func;
+}
+/* set min-metric */
+void route_map_set_min_metric_hook(int (*func)(struct route_map_index *index,
+					       const char *command,
+					       const char *arg, char *errmsg,
+					       size_t errmsg_len))
+{
+	rmap_match_set_hook.set_min_metric = func;
+}
+
+/* no set min-metric */
+void route_map_no_set_min_metric_hook(int (*func)(struct route_map_index *index,
+						  const char *command,
+						  const char *arg, char *errmsg,
+						  size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_min_metric = func;
+}
+/* set max-metric */
+void route_map_set_max_metric_hook(int (*func)(struct route_map_index *index,
+					       const char *command,
+					       const char *arg, char *errmsg,
+					       size_t errmsg_len))
+{
+	rmap_match_set_hook.set_max_metric = func;
+}
+
+/* no set max-metric */
+void route_map_no_set_max_metric_hook(int (*func)(struct route_map_index *index,
+						  const char *command,
+						  const char *arg, char *errmsg,
+						  size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_max_metric = func;
+}
+
+/* set tag */
+void route_map_set_tag_hook(int (*func)(struct route_map_index *index,
+					const char *command, const char *arg,
+					char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.set_tag = func;
+}
+
+/* no set tag */
+void route_map_no_set_tag_hook(int (*func)(struct route_map_index *index,
+					   const char *command,
+					   const char *arg,
+					   char *errmsg, size_t errmsg_len))
+{
+	rmap_match_set_hook.no_set_tag = func;
+}
+
+int generic_match_add(struct route_map_index *index,
+		      const char *command, const char *arg,
+		      route_map_event_t type,
+		      char *errmsg, size_t errmsg_len)
+{
+	enum rmap_compile_rets ret;
+
+	ret = route_map_add_match(index, command, arg, type);
+	switch (ret) {
+	case RMAP_RULE_MISSING:
+		snprintf(errmsg, errmsg_len, "%% [%s] Can't find rule.",
+			 frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_ERROR:
+		snprintf(errmsg, errmsg_len,
+			 "%% [%s] Argument form is unsupported or malformed.",
+			 frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_SUCCESS:
+		/*
+		 * Nothing to do here move along
+		 */
+		break;
+	}
+
+	return CMD_SUCCESS;
+}
+
+int generic_match_delete(struct route_map_index *index,
+			 const char *command, const char *arg,
+			 route_map_event_t type,
+			 char *errmsg, size_t errmsg_len)
+{
+	enum rmap_compile_rets ret;
+	int retval = CMD_SUCCESS;
+	char *dep_name = NULL;
+	const char *tmpstr;
+	char *rmap_name = NULL;
+
+	if (type != RMAP_EVENT_MATCH_DELETED) {
+		/* ignore the mundane, the types without any dependency */
+		if (arg == NULL) {
+			if ((tmpstr = route_map_get_match_arg(index, command))
+			    != NULL)
+				dep_name =
+					XSTRDUP(MTYPE_ROUTE_MAP_RULE, tmpstr);
+		} else {
+			dep_name = XSTRDUP(MTYPE_ROUTE_MAP_RULE, arg);
+		}
+		rmap_name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, index->map->name);
+	}
+
+	ret = route_map_delete_match(index, command, dep_name, type);
+	switch (ret) {
+	case RMAP_RULE_MISSING:
+		snprintf(errmsg, errmsg_len, "%% [%s] Can't find rule.",
+			 frr_protonameinst);
+		retval = CMD_WARNING_CONFIG_FAILED;
+		break;
+	case RMAP_COMPILE_ERROR:
+		snprintf(errmsg, errmsg_len,
+			 "%% [%s] Argument form is unsupported or malformed.",
+			 frr_protonameinst);
+		retval = CMD_WARNING_CONFIG_FAILED;
+		break;
+	case RMAP_COMPILE_SUCCESS:
+		/*
+		 * Nothing to do here
+		 */
+		break;
+	}
+
+	XFREE(MTYPE_ROUTE_MAP_RULE, dep_name);
+	XFREE(MTYPE_ROUTE_MAP_NAME, rmap_name);
+
+	return retval;
+}
+
+int generic_set_add(struct route_map_index *index,
+		    const char *command, const char *arg,
+		    char *errmsg, size_t errmsg_len)
+{
+	enum rmap_compile_rets ret;
+
+	ret = route_map_add_set(index, command, arg);
+	switch (ret) {
+	case RMAP_RULE_MISSING:
+		snprintf(errmsg, errmsg_len,
+			 "%% [%s] Can't find rule.", frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_ERROR:
+		snprintf(errmsg, errmsg_len,
+			 "%% [%s] Argument form is unsupported or malformed.",
+			frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_SUCCESS:
+		break;
+	}
+
+	return CMD_SUCCESS;
+}
+
+int generic_set_delete(struct route_map_index *index,
+		       const char *command, const char *arg,
+		       char *errmsg, size_t errmsg_len)
+{
+	enum rmap_compile_rets ret;
+
+	ret = route_map_delete_set(index, command, arg);
+	switch (ret) {
+	case RMAP_RULE_MISSING:
+			snprintf(errmsg, errmsg_len, "%% [%s] Can't find rule.",
+				 frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_ERROR:
+			snprintf(errmsg, errmsg_len,
+				 "%%  [%s] Argument form is unsupported or malformed.",
+				 frr_protonameinst);
+		return CMD_WARNING_CONFIG_FAILED;
+	case RMAP_COMPILE_SUCCESS:
+		break;
+	}
+
+	return CMD_SUCCESS;
+}
+
+
+/* Master list of route map. */
+struct route_map_list route_map_master = {NULL, NULL, NULL, NULL, NULL};
+struct hash *route_map_master_hash = NULL;
+
+static unsigned int route_map_hash_key_make(const void *p)
+{
+	const struct route_map *map = p;
+	return string_hash_make(map->name);
+}
+
+static bool route_map_hash_cmp(const void *p1, const void *p2)
+{
+	const struct route_map *map1 = p1;
+	const struct route_map *map2 = p2;
+
+	if (!strcmp(map1->name, map2->name))
+		return true;
+
+	return false;
+}
+
+enum route_map_upd8_type {
+	ROUTE_MAP_ADD = 1,
+	ROUTE_MAP_DEL,
+};
+
+/* all possible route-map dependency types */
+enum route_map_dep_type {
+	ROUTE_MAP_DEP_RMAP = 1,
+	ROUTE_MAP_DEP_CLIST,
+	ROUTE_MAP_DEP_ECLIST,
+	ROUTE_MAP_DEP_LCLIST,
+	ROUTE_MAP_DEP_PLIST,
+	ROUTE_MAP_DEP_ASPATH,
+	ROUTE_MAP_DEP_FILTER,
+	ROUTE_MAP_DEP_MAX,
+};
+
+struct route_map_dep {
+	char *dep_name;
+	struct hash *dep_rmap_hash;
+	struct hash *this_hash; /* ptr to the hash structure this is part of */
+};
+
+struct route_map_dep_data {
+	/* Route-map name.
+	 */
+	char *rname;
+	/* Count of number of sequences of this
+	 * route-map that depend on the same entity.
+	 */
+	uint16_t  refcnt;
+};
+
+/* Hashes maintaining dependency between various sublists used by route maps */
+static struct hash *route_map_dep_hash[ROUTE_MAP_DEP_MAX];
+
+static unsigned int route_map_dep_hash_make_key(const void *p);
+static void route_map_clear_all_references(char *rmap_name);
+static void route_map_rule_delete(struct route_map_rule_list *,
+				  struct route_map_rule *);
+
+uint32_t rmap_debug;
+
+/* New route map allocation. Please note route map's name must be
+   specified. */
+static struct route_map *route_map_new(const char *name)
+{
+	struct route_map *new;
+
+	new = XCALLOC(MTYPE_ROUTE_MAP, sizeof(struct route_map));
+	new->name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, name);
+	QOBJ_REG(new, route_map);
+	return new;
+}
+
+/* Add new name to route_map. */
+static struct route_map *route_map_add(const char *name)
+{
+	struct route_map *map, *exist;
+	struct route_map_list *list;
+
+	map = route_map_new(name);
+	list = &route_map_master;
+
+	/*
+	 * Add map to the hash
+	 *
+	 * If the map already exists in the hash, then we know that
+	 * FRR is now in a sequence of delete/create.
+	 * All FRR needs to do here is set the to_be_processed
+	 * bit (to inherit from the old one
+	 */
+	exist = hash_release(route_map_master_hash, map);
+	if (exist) {
+		map->to_be_processed = exist->to_be_processed;
+		route_map_free_map(exist);
+	}
+	hash_get(route_map_master_hash, map, hash_alloc_intern);
+
+	/* Add new entry to the head of the list to match how it is added in the
+	 * hash table. This is to ensure that if the same route-map has been
+	 * created more than once and then marked for deletion (which can happen
+	 * if prior deletions haven't completed as BGP hasn't yet done the
+	 * route-map processing), the order of the entities is the same in both
+	 * the list and the hash table. Otherwise, since there is nothing to
+	 * distinguish between the two entries, the wrong entry could get freed.
+	 * TODO: This needs to be re-examined to handle it better - e.g., revive
+	 * a deleted entry if the route-map is created again.
+	 */
+	map->prev = NULL;
+	map->next = list->head;
+	if (list->head)
+		list->head->prev = map;
+	list->head = map;
+	if (!list->tail)
+		list->tail = map;
+
+	/* Execute hook. */
+	if (route_map_master.add_hook) {
+		(*route_map_master.add_hook)(name);
+		route_map_notify_dependencies(name, RMAP_EVENT_CALL_ADDED);
+	}
+
+	if (!map->ipv4_prefix_table)
+		map->ipv4_prefix_table = route_table_init();
+
+	if (!map->ipv6_prefix_table)
+		map->ipv6_prefix_table = route_table_init();
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Add route-map %s", name);
+	return map;
+}
+
+/* this is supposed to be called post processing by
+ * the delete hook function. Don't invoke delete_hook
+ * again in this routine.
+ */
+static void route_map_free_map(struct route_map *map)
+{
+	struct route_map_list *list;
+	struct route_map_index *index;
+
+	if (map == NULL)
+		return;
+
+	while ((index = map->head) != NULL)
+		route_map_index_delete(index, 0);
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Deleting route-map %s", map->name);
+
+	list = &route_map_master;
+
+	QOBJ_UNREG(map);
+
+	if (map->next)
+		map->next->prev = map->prev;
+	else
+		list->tail = map->prev;
+
+	if (map->prev)
+		map->prev->next = map->next;
+	else
+		list->head = map->next;
+
+	route_table_finish(map->ipv4_prefix_table);
+	route_table_finish(map->ipv6_prefix_table);
+
+	hash_release(route_map_master_hash, map);
+	XFREE(MTYPE_ROUTE_MAP_NAME, map->name);
+	XFREE(MTYPE_ROUTE_MAP, map);
+}
+
+/* Route map delete from list. */
+void route_map_delete(struct route_map *map)
+{
+	struct route_map_index *index;
+	char *name;
+
+	while ((index = map->head) != NULL)
+		route_map_index_delete(index, 0);
+
+	name = map->name;
+	map->head = NULL;
+
+	/* Clear all dependencies */
+	route_map_clear_all_references(name);
+	map->deleted = true;
+	/* Execute deletion hook. */
+	if (route_map_master.delete_hook) {
+		(*route_map_master.delete_hook)(name);
+		route_map_notify_dependencies(name, RMAP_EVENT_CALL_DELETED);
+	}
+
+	if (!map->to_be_processed) {
+		route_map_free_map(map);
+	}
+}
+
+/* Lookup route map by route map name string. */
+struct route_map *route_map_lookup_by_name(const char *name)
+{
+	struct route_map *map;
+	struct route_map tmp_map;
+
+	if (!name)
+		return NULL;
+
+	// map.deleted is false via memset
+	memset(&tmp_map, 0, sizeof(tmp_map));
+	tmp_map.name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, name);
+	map = hash_lookup(route_map_master_hash, &tmp_map);
+	XFREE(MTYPE_ROUTE_MAP_NAME, tmp_map.name);
+
+	if (map && map->deleted)
+		return NULL;
+
+	return map;
+}
+
+/* Simple helper to warn if route-map does not exist. */
+struct route_map *route_map_lookup_warn_noexist(struct vty *vty, const char *name)
+{
+	struct route_map *route_map = route_map_lookup_by_name(name);
+
+	if (!route_map)
+		if (vty_shell_serv(vty))
+			vty_out(vty, "The route-map '%s' does not exist.\n", name);
+
+	return route_map;
+}
+
+int route_map_mark_updated(const char *name)
+{
+	struct route_map *map;
+	int ret = -1;
+	struct route_map tmp_map;
+
+	if (!name)
+		return (ret);
+
+	map = route_map_lookup_by_name(name);
+
+	/* If we did not find the routemap with deleted=false try again
+	 * with deleted=true
+	 */
+	if (!map) {
+		memset(&tmp_map, 0, sizeof(tmp_map));
+		tmp_map.name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, name);
+		tmp_map.deleted = true;
+		map = hash_lookup(route_map_master_hash, &tmp_map);
+		XFREE(MTYPE_ROUTE_MAP_NAME, tmp_map.name);
+	}
+
+	if (map) {
+		map->to_be_processed = true;
+		ret = 0;
+	}
+
+	return (ret);
+}
+
+static void route_map_clear_updated(struct route_map *map)
+{
+	if (map) {
+		map->to_be_processed = false;
+		if (map->deleted)
+			route_map_free_map(map);
+	}
+}
+
+/* Lookup route map.  If there isn't route map create one and return
+   it. */
+struct route_map *route_map_get(const char *name)
+{
+	struct route_map *map;
+
+	map = route_map_lookup_by_name(name);
+	if (map == NULL)
+		map = route_map_add(name);
+
+	return map;
+}
+
+void route_map_walk_update_list(void (*route_map_update_fn)(char *name))
+{
+	struct route_map *node;
+	struct route_map *nnode = NULL;
+
+	for (node = route_map_master.head; node; node = nnode) {
+		if (node->to_be_processed) {
+			/* DD: Should we add any thread yield code here */
+			route_map_update_fn(node->name);
+			nnode = node->next;
+			route_map_clear_updated(node);
+		} else
+			nnode = node->next;
+	}
+}
+
+/* Return route map's type string. */
+static const char *route_map_type_str(enum route_map_type type)
+{
+	switch (type) {
+	case RMAP_PERMIT:
+		return "permit";
+	case RMAP_DENY:
+		return "deny";
+	case RMAP_ANY:
+		return "";
+	}
+
+	return "";
+}
+
+static const char *route_map_cmd_result_str(enum route_map_cmd_result_t res)
+{
+	switch (res) {
+	case RMAP_MATCH:
+		return "match";
+	case RMAP_NOMATCH:
+		return "no match";
+	case RMAP_NOOP:
+		return "noop";
+	case RMAP_ERROR:
+		return "error";
+	case RMAP_OKAY:
+		return "okay";
+	}
+
+	return "invalid";
+}
+
+static const char *route_map_result_str(route_map_result_t res)
+{
+	switch (res) {
+	case RMAP_DENYMATCH:
+		return "deny";
+	case RMAP_PERMITMATCH:
+		return "permit";
+	}
+
+	return "invalid";
+}
+
+/* show route-map */
+static void vty_show_route_map_entry(struct vty *vty, struct route_map *map,
+				     json_object *json)
+{
+	struct route_map_index *index;
+	struct route_map_rule *rule;
+	json_object *json_rmap = NULL;
+	json_object *json_rules = NULL;
+
+	if (json) {
+		json_rmap = json_object_new_object();
+		json_object_object_add(json, map->name, json_rmap);
+
+		json_rules = json_object_new_array();
+		json_object_int_add(json_rmap, "invoked",
+				    map->applied - map->applied_clear);
+		json_object_boolean_add(json_rmap, "disabledOptimization",
+					map->optimization_disabled);
+		json_object_boolean_add(json_rmap, "processedChange",
+					map->to_be_processed);
+		json_object_object_add(json_rmap, "rules", json_rules);
+	} else {
+		vty_out(vty,
+			"route-map: %s Invoked: %" PRIu64
+			" Optimization: %s Processed Change: %s\n",
+			map->name, map->applied - map->applied_clear,
+			map->optimization_disabled ? "disabled" : "enabled",
+			map->to_be_processed ? "true" : "false");
+	}
+
+	for (index = map->head; index; index = index->next) {
+		if (json) {
+			json_object *json_rule;
+			json_object *json_matches;
+			json_object *json_sets;
+			char action[BUFSIZ] = {};
+
+			json_rule = json_object_new_object();
+			json_object_array_add(json_rules, json_rule);
+
+			json_object_int_add(json_rule, "sequenceNumber",
+					    index->pref);
+			json_object_string_add(json_rule, "type",
+					       route_map_type_str(index->type));
+			json_object_int_add(json_rule, "invoked",
+					    index->applied
+						    - index->applied_clear);
+
+			/* Description */
+			if (index->description)
+				json_object_string_add(json_rule, "description",
+						       index->description);
+
+			/* Match clauses */
+			json_matches = json_object_new_array();
+			json_object_object_add(json_rule, "matchClauses",
+					       json_matches);
+			for (rule = index->match_list.head; rule;
+			     rule = rule->next) {
+				char buf[BUFSIZ];
+
+				snprintf(buf, sizeof(buf), "%s %s",
+					 rule->cmd->str, rule->rule_str);
+				json_array_string_add(json_matches, buf);
+			}
+
+			/* Set clauses */
+			json_sets = json_object_new_array();
+			json_object_object_add(json_rule, "setClauses",
+					       json_sets);
+			for (rule = index->set_list.head; rule;
+			     rule = rule->next) {
+				char buf[BUFSIZ];
+
+				snprintf(buf, sizeof(buf), "%s %s",
+					 rule->cmd->str, rule->rule_str);
+				json_array_string_add(json_sets, buf);
+			}
+
+			/* Call clause */
+			if (index->nextrm)
+				json_object_string_add(json_rule, "callClause",
+						       index->nextrm);
+
+			/* Exit Policy */
+			if (index->exitpolicy == RMAP_GOTO)
+				snprintf(action, sizeof(action), "Goto %d",
+					 index->nextpref);
+			else if (index->exitpolicy == RMAP_NEXT)
+				snprintf(action, sizeof(action),
+					 "Continue to next entry");
+			else if (index->exitpolicy == RMAP_EXIT)
+				snprintf(action, sizeof(action),
+					 "Exit routemap");
+			if (action[0] != '\0')
+				json_object_string_add(json_rule, "action",
+						       action);
+		} else {
+			vty_out(vty, " %s, sequence %d Invoked %" PRIu64 "\n",
+				route_map_type_str(index->type), index->pref,
+				index->applied - index->applied_clear);
+
+			/* Description */
+			if (index->description)
+				vty_out(vty, "  Description:\n    %s\n",
+					index->description);
+
+			/* Match clauses */
+			vty_out(vty, "  Match clauses:\n");
+			for (rule = index->match_list.head; rule;
+			     rule = rule->next)
+				vty_out(vty, "    %s %s\n", rule->cmd->str,
+					rule->rule_str);
+
+			/* Set clauses */
+			vty_out(vty, "  Set clauses:\n");
+			for (rule = index->set_list.head; rule;
+			     rule = rule->next)
+				vty_out(vty, "    %s %s\n", rule->cmd->str,
+					rule->rule_str);
+
+			/* Call clause */
+			vty_out(vty, "  Call clause:\n");
+			if (index->nextrm)
+				vty_out(vty, "    Call %s\n", index->nextrm);
+
+			/* Exit Policy */
+			vty_out(vty, "  Action:\n");
+			if (index->exitpolicy == RMAP_GOTO)
+				vty_out(vty, "    Goto %d\n", index->nextpref);
+			else if (index->exitpolicy == RMAP_NEXT)
+				vty_out(vty, "    Continue to next entry\n");
+			else if (index->exitpolicy == RMAP_EXIT)
+				vty_out(vty, "    Exit routemap\n");
+		}
+	}
+}
+
+static int sort_route_map(const void **map1, const void **map2)
+{
+	const struct route_map *m1 = *map1;
+	const struct route_map *m2 = *map2;
+
+	return strcmp(m1->name, m2->name);
+}
+
+static int vty_show_route_map(struct vty *vty, const char *name, bool use_json)
+{
+	struct route_map *map;
+	json_object *json = NULL;
+	json_object *json_proto = NULL;
+
+	if (use_json) {
+		json = json_object_new_object();
+		json_proto = json_object_new_object();
+		json_object_object_add(json, frr_protonameinst, json_proto);
+	} else
+		vty_out(vty, "%s:\n", frr_protonameinst);
+
+	if (name) {
+		map = route_map_lookup_by_name(name);
+
+		if (map) {
+			vty_show_route_map_entry(vty, map, json_proto);
+		} else if (!use_json) {
+			vty_out(vty, "%s: 'route-map %s' not found\n",
+				frr_protonameinst, name);
+		}
+	} else {
+
+		struct list *maplist = list_new();
+		struct listnode *ln;
+
+		for (map = route_map_master.head; map; map = map->next)
+			listnode_add(maplist, map);
+
+		list_sort(maplist, sort_route_map);
+
+		for (ALL_LIST_ELEMENTS_RO(maplist, ln, map))
+			vty_show_route_map_entry(vty, map, json_proto);
+
+		list_delete(&maplist);
+	}
+
+	return vty_json(vty, json);
+}
+
+/* Unused route map details */
+static int vty_show_unused_route_map(struct vty *vty)
+{
+	struct list *maplist = list_new();
+	struct listnode *ln;
+	struct route_map *map;
+
+	for (map = route_map_master.head; map; map = map->next) {
+		/* If use_count is zero, No protocol is using this routemap.
+		 * so adding to the list.
+		 */
+		if (!map->use_count)
+			listnode_add(maplist, map);
+	}
+
+	if (maplist->count > 0) {
+		vty_out(vty, "\n%s:\n", frr_protonameinst);
+		list_sort(maplist, sort_route_map);
+
+		for (ALL_LIST_ELEMENTS_RO(maplist, ln, map))
+			vty_show_route_map_entry(vty, map, NULL);
+	} else {
+		vty_out(vty, "\n%s: None\n", frr_protonameinst);
+	}
+
+	list_delete(&maplist);
+	return CMD_SUCCESS;
+}
+
+/* New route map allocation. Please note route map's name must be
+   specified. */
+static struct route_map_index *route_map_index_new(void)
+{
+	struct route_map_index *new;
+
+	new = XCALLOC(MTYPE_ROUTE_MAP_INDEX, sizeof(struct route_map_index));
+	new->exitpolicy = RMAP_EXIT; /* Default to Cisco-style */
+	TAILQ_INIT(&new->rhclist);
+	QOBJ_REG(new, route_map_index);
+	return new;
+}
+
+/* Free route map index. */
+void route_map_index_delete(struct route_map_index *index, int notify)
+{
+	struct routemap_hook_context *rhc;
+	struct route_map_rule *rule;
+
+	QOBJ_UNREG(index);
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Deleting route-map %s sequence %d",
+			   index->map->name, index->pref);
+
+	/* Free route map entry description. */
+	XFREE(MTYPE_TMP, index->description);
+
+	/* Free route map northbound hook contexts. */
+	while ((rhc = TAILQ_FIRST(&index->rhclist)) != NULL)
+		routemap_hook_context_free(rhc);
+
+	/* Free route match. */
+	while ((rule = index->match_list.head) != NULL) {
+		if (IS_RULE_IPv4_PREFIX_LIST(rule->cmd->str))
+			route_map_pfx_tbl_update(RMAP_EVENT_PLIST_DELETED,
+						 index, AFI_IP, rule->rule_str);
+		else if (IS_RULE_IPv6_PREFIX_LIST(rule->cmd->str))
+			route_map_pfx_tbl_update(RMAP_EVENT_PLIST_DELETED,
+						 index, AFI_IP6,
+						 rule->rule_str);
+
+		route_map_rule_delete(&index->match_list, rule);
+	}
+
+	/* Free route set. */
+	while ((rule = index->set_list.head) != NULL)
+		route_map_rule_delete(&index->set_list, rule);
+
+	/* Remove index from route map list. */
+	if (index->next)
+		index->next->prev = index->prev;
+	else
+		index->map->tail = index->prev;
+
+	if (index->prev)
+		index->prev->next = index->next;
+	else
+		index->map->head = index->next;
+
+	/* Free 'char *nextrm' if not NULL */
+	XFREE(MTYPE_ROUTE_MAP_NAME, index->nextrm);
+
+	route_map_pfx_tbl_update(RMAP_EVENT_INDEX_DELETED, index, 0, NULL);
+
+	/* Execute event hook. */
+	if (route_map_master.event_hook && notify) {
+		(*route_map_master.event_hook)(index->map->name);
+		route_map_notify_dependencies(index->map->name,
+					      RMAP_EVENT_CALL_ADDED);
+	}
+	XFREE(MTYPE_ROUTE_MAP_INDEX, index);
+}
+
+/* Lookup index from route map. */
+static struct route_map_index *route_map_index_lookup(struct route_map *map,
+						      enum route_map_type type,
+						      int pref)
+{
+	struct route_map_index *index;
+
+	for (index = map->head; index; index = index->next)
+		if ((index->type == type || type == RMAP_ANY)
+		    && index->pref == pref)
+			return index;
+	return NULL;
+}
+
+/* Add new index to route map. */
+static struct route_map_index *
+route_map_index_add(struct route_map *map, enum route_map_type type, int pref)
+{
+	struct route_map_index *index;
+	struct route_map_index *point;
+
+	/* Allocate new route map inex. */
+	index = route_map_index_new();
+	index->map = map;
+	index->type = type;
+	index->pref = pref;
+
+	/* Compare preference. */
+	for (point = map->head; point; point = point->next)
+		if (point->pref >= pref)
+			break;
+
+	if (map->head == NULL) {
+		map->head = map->tail = index;
+	} else if (point == NULL) {
+		index->prev = map->tail;
+		map->tail->next = index;
+		map->tail = index;
+	} else if (point == map->head) {
+		index->next = map->head;
+		map->head->prev = index;
+		map->head = index;
+	} else {
+		index->next = point;
+		index->prev = point->prev;
+		if (point->prev)
+			point->prev->next = index;
+		point->prev = index;
+	}
+
+	route_map_pfx_tbl_update(RMAP_EVENT_INDEX_ADDED, index, 0, NULL);
+
+	/* Execute event hook. */
+	if (route_map_master.event_hook) {
+		(*route_map_master.event_hook)(map->name);
+		route_map_notify_dependencies(map->name, RMAP_EVENT_CALL_ADDED);
+	}
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Route-map %s add sequence %d, type: %s",
+			   map->name, pref, route_map_type_str(type));
+
+	return index;
+}
+
+/* Get route map index. */
+struct route_map_index *
+route_map_index_get(struct route_map *map, enum route_map_type type, int pref)
+{
+	struct route_map_index *index;
+
+	index = route_map_index_lookup(map, RMAP_ANY, pref);
+	if (index && index->type != type) {
+		/* Delete index from route map. */
+		route_map_index_delete(index, 1);
+		index = NULL;
+	}
+	if (index == NULL)
+		index = route_map_index_add(map, type, pref);
+	return index;
+}
+
+/* New route map rule */
+static struct route_map_rule *route_map_rule_new(void)
+{
+	struct route_map_rule *new;
+
+	new = XCALLOC(MTYPE_ROUTE_MAP_RULE, sizeof(struct route_map_rule));
+	return new;
+}
+
+/* Install rule command to the match list. */
+void _route_map_install_match(struct route_map_rule_cmd_proxy *proxy)
+{
+	rmap_cmd_name_add(rmap_match_cmds, proxy);
+}
+
+/* Install rule command to the set list. */
+void _route_map_install_set(struct route_map_rule_cmd_proxy *proxy)
+{
+	rmap_cmd_name_add(rmap_set_cmds, proxy);
+}
+
+/* Lookup rule command from match list. */
+static const struct route_map_rule_cmd *route_map_lookup_match(const char *name)
+{
+	struct route_map_rule_cmd refcmd = {.str = name};
+	struct route_map_rule_cmd_proxy ref = {.cmd = &refcmd};
+	struct route_map_rule_cmd_proxy *res;
+
+	res = rmap_cmd_name_find(rmap_match_cmds, &ref);
+	if (res)
+		return res->cmd;
+	return NULL;
+}
+
+/* Lookup rule command from set list. */
+static const struct route_map_rule_cmd *route_map_lookup_set(const char *name)
+{
+	struct route_map_rule_cmd refcmd = {.str = name};
+	struct route_map_rule_cmd_proxy ref = {.cmd = &refcmd};
+	struct route_map_rule_cmd_proxy *res;
+
+	res = rmap_cmd_name_find(rmap_set_cmds, &ref);
+	if (res)
+		return res->cmd;
+	return NULL;
+}
+
+/* Add match and set rule to rule list. */
+static void route_map_rule_add(struct route_map_rule_list *list,
+			       struct route_map_rule *rule)
+{
+	rule->next = NULL;
+	rule->prev = list->tail;
+	if (list->tail)
+		list->tail->next = rule;
+	else
+		list->head = rule;
+	list->tail = rule;
+}
+
+/* Delete rule from rule list. */
+static void route_map_rule_delete(struct route_map_rule_list *list,
+				  struct route_map_rule *rule)
+{
+	if (rule->cmd->func_free)
+		(*rule->cmd->func_free)(rule->value);
+
+	XFREE(MTYPE_ROUTE_MAP_RULE_STR, rule->rule_str);
+
+	if (rule->next)
+		rule->next->prev = rule->prev;
+	else
+		list->tail = rule->prev;
+	if (rule->prev)
+		rule->prev->next = rule->next;
+	else
+		list->head = rule->next;
+
+	XFREE(MTYPE_ROUTE_MAP_RULE, rule);
+}
+
+/* strcmp wrapper function which don't crush even argument is NULL. */
+static int rulecmp(const char *dst, const char *src)
+{
+	if (dst == NULL) {
+		if (src == NULL)
+			return 0;
+		else
+			return 1;
+	} else {
+		if (src == NULL)
+			return 1;
+		else
+			return strcmp(dst, src);
+	}
+	return 1;
+}
+
+/* Use this to return the already specified argument for this match. This is
+ * useful to get the specified argument with a route map match rule when the
+ * rule is being deleted and the argument is not provided.
+ */
+const char *route_map_get_match_arg(struct route_map_index *index,
+				    const char *match_name)
+{
+	struct route_map_rule *rule;
+	const struct route_map_rule_cmd *cmd;
+
+	/* First lookup rule for add match statement. */
+	cmd = route_map_lookup_match(match_name);
+	if (cmd == NULL)
+		return NULL;
+
+	for (rule = index->match_list.head; rule; rule = rule->next)
+		if (rule->cmd == cmd && rule->rule_str != NULL)
+			return (rule->rule_str);
+
+	return NULL;
+}
+
+static route_map_event_t get_route_map_delete_event(route_map_event_t type)
+{
+	switch (type) {
+	case RMAP_EVENT_CALL_ADDED:
+		return RMAP_EVENT_CALL_DELETED;
+	case RMAP_EVENT_PLIST_ADDED:
+		return RMAP_EVENT_PLIST_DELETED;
+	case RMAP_EVENT_CLIST_ADDED:
+		return RMAP_EVENT_CLIST_DELETED;
+	case RMAP_EVENT_ECLIST_ADDED:
+		return RMAP_EVENT_ECLIST_DELETED;
+	case RMAP_EVENT_LLIST_ADDED:
+		return RMAP_EVENT_LLIST_DELETED;
+	case RMAP_EVENT_ASLIST_ADDED:
+		return RMAP_EVENT_ASLIST_DELETED;
+	case RMAP_EVENT_FILTER_ADDED:
+		return RMAP_EVENT_FILTER_DELETED;
+	case RMAP_EVENT_SET_ADDED:
+	case RMAP_EVENT_SET_DELETED:
+	case RMAP_EVENT_SET_REPLACED:
+	case RMAP_EVENT_MATCH_ADDED:
+	case RMAP_EVENT_MATCH_DELETED:
+	case RMAP_EVENT_MATCH_REPLACED:
+	case RMAP_EVENT_INDEX_ADDED:
+	case RMAP_EVENT_INDEX_DELETED:
+	case RMAP_EVENT_CALL_DELETED:
+	case RMAP_EVENT_PLIST_DELETED:
+	case RMAP_EVENT_CLIST_DELETED:
+	case RMAP_EVENT_ECLIST_DELETED:
+	case RMAP_EVENT_LLIST_DELETED:
+	case RMAP_EVENT_ASLIST_DELETED:
+	case RMAP_EVENT_FILTER_DELETED:
+		/* This function returns the appropriate 'deleted' event type
+		 * for every 'added' event type passed to this function.
+		 * This is done only for named entities used in the
+		 * route-map match commands.
+		 * This function is not to be invoked for any of the other event
+		 * types.
+		 */
+		assert(0);
+	}
+
+	assert(0);
+	/*
+	 * Return to make c happy but if we get here something has gone
+	 * terribly terribly wrong, so yes this return makes no sense.
+	 */
+	return RMAP_EVENT_CALL_ADDED;
+}
+
+/* Add match statement to route map. */
+enum rmap_compile_rets route_map_add_match(struct route_map_index *index,
+					   const char *match_name,
+					   const char *match_arg,
+					   route_map_event_t type)
+{
+	struct route_map_rule *rule;
+	struct route_map_rule *next;
+	const struct route_map_rule_cmd *cmd;
+	void *compile;
+	int8_t delete_rmap_event_type = 0;
+	const char *rule_key;
+
+	/* First lookup rule for add match statement. */
+	cmd = route_map_lookup_match(match_name);
+	if (cmd == NULL)
+		return RMAP_RULE_MISSING;
+
+	/* Next call compile function for this match statement. */
+	if (cmd->func_compile) {
+		compile = (*cmd->func_compile)(match_arg);
+		if (compile == NULL)
+			return RMAP_COMPILE_ERROR;
+	} else
+		compile = NULL;
+	/* use the compiled results if applicable */
+	if (compile && cmd->func_get_rmap_rule_key)
+		rule_key = (*cmd->func_get_rmap_rule_key)
+			   (compile);
+	else
+		rule_key = match_arg;
+
+	/* If argument is completely same ignore it. */
+	for (rule = index->match_list.head; rule; rule = next) {
+		next = rule->next;
+		if (rule->cmd == cmd) {
+			/* If the configured route-map match rule is exactly
+			 * the same as the existing configuration then,
+			 * ignore the duplicate configuration.
+			 */
+			if (rulecmp(match_arg, rule->rule_str) == 0) {
+				if (cmd->func_free)
+					(*cmd->func_free)(compile);
+
+				return RMAP_COMPILE_SUCCESS;
+			}
+
+			/* If IPv4 or IPv6 prefix-list match criteria
+			 * has been delete to the route-map index, update
+			 * the route-map's prefix table.
+			 */
+			if (IS_RULE_IPv4_PREFIX_LIST(match_name))
+				route_map_pfx_tbl_update(
+					RMAP_EVENT_PLIST_DELETED, index, AFI_IP,
+					rule->rule_str);
+			else if (IS_RULE_IPv6_PREFIX_LIST(match_name))
+				route_map_pfx_tbl_update(
+					RMAP_EVENT_PLIST_DELETED, index,
+					AFI_IP6, rule->rule_str);
+
+			/* Remove the dependency of the route-map on the rule
+			 * that is being replaced.
+			 */
+			if (type >= RMAP_EVENT_CALL_ADDED) {
+				delete_rmap_event_type =
+					get_route_map_delete_event(type);
+				route_map_upd8_dependency(
+							delete_rmap_event_type,
+							rule->rule_str,
+							index->map->name);
+			}
+
+			route_map_rule_delete(&index->match_list, rule);
+		}
+	}
+
+	/* Add new route map match rule. */
+	rule = route_map_rule_new();
+	rule->cmd = cmd;
+	rule->value = compile;
+	if (match_arg)
+		rule->rule_str = XSTRDUP(MTYPE_ROUTE_MAP_RULE_STR, match_arg);
+	else
+		rule->rule_str = NULL;
+
+	/* Add new route match rule to linked list. */
+	route_map_rule_add(&index->match_list, rule);
+
+	/* If IPv4 or IPv6 prefix-list match criteria
+	 * has been added to the route-map index, update
+	 * the route-map's prefix table.
+	 */
+	if (IS_RULE_IPv4_PREFIX_LIST(match_name)) {
+		route_map_pfx_tbl_update(RMAP_EVENT_PLIST_ADDED, index, AFI_IP,
+					 match_arg);
+	} else if (IS_RULE_IPv6_PREFIX_LIST(match_name)) {
+		route_map_pfx_tbl_update(RMAP_EVENT_PLIST_ADDED, index, AFI_IP6,
+					 match_arg);
+	}
+
+	/* Execute event hook. */
+	if (route_map_master.event_hook) {
+		(*route_map_master.event_hook)(index->map->name);
+		route_map_notify_dependencies(index->map->name,
+					      RMAP_EVENT_CALL_ADDED);
+	}
+	if (type != RMAP_EVENT_MATCH_ADDED)
+		route_map_upd8_dependency(type, rule_key, index->map->name);
+
+	return RMAP_COMPILE_SUCCESS;
+}
+
+/* Delete specified route match rule. */
+enum rmap_compile_rets route_map_delete_match(struct route_map_index *index,
+					      const char *match_name,
+					      const char *match_arg,
+					      route_map_event_t type)
+{
+	struct route_map_rule *rule;
+	const struct route_map_rule_cmd *cmd;
+	const char *rule_key;
+
+	cmd = route_map_lookup_match(match_name);
+	if (cmd == NULL)
+		return RMAP_RULE_MISSING;
+
+	for (rule = index->match_list.head; rule; rule = rule->next)
+		if (rule->cmd == cmd && (rulecmp(rule->rule_str, match_arg) == 0
+					 || match_arg == NULL)) {
+			/* Execute event hook. */
+			if (route_map_master.event_hook) {
+				(*route_map_master.event_hook)(index->map->name);
+				route_map_notify_dependencies(
+					index->map->name,
+					RMAP_EVENT_CALL_ADDED);
+			}
+			if (cmd->func_get_rmap_rule_key)
+				rule_key = (*cmd->func_get_rmap_rule_key)
+					   (rule->value);
+			else
+				rule_key = match_arg;
+
+			if (type != RMAP_EVENT_MATCH_DELETED && rule_key)
+				route_map_upd8_dependency(type, rule_key,
+						index->map->name);
+
+			route_map_rule_delete(&index->match_list, rule);
+
+			/* If IPv4 or IPv6 prefix-list match criteria
+			 * has been delete from the route-map index, update
+			 * the route-map's prefix table.
+			 */
+			if (IS_RULE_IPv4_PREFIX_LIST(match_name)) {
+				route_map_pfx_tbl_update(
+					RMAP_EVENT_PLIST_DELETED, index, AFI_IP,
+					match_arg);
+			} else if (IS_RULE_IPv6_PREFIX_LIST(match_name)) {
+				route_map_pfx_tbl_update(
+					RMAP_EVENT_PLIST_DELETED, index,
+					AFI_IP6, match_arg);
+			}
+
+			return RMAP_COMPILE_SUCCESS;
+		}
+	/* Can't find matched rule. */
+	return RMAP_RULE_MISSING;
+}
+
+/* Add route-map set statement to the route map. */
+enum rmap_compile_rets route_map_add_set(struct route_map_index *index,
+					 const char *set_name,
+					 const char *set_arg)
+{
+	struct route_map_rule *rule;
+	struct route_map_rule *next;
+	const struct route_map_rule_cmd *cmd;
+	void *compile;
+
+	cmd = route_map_lookup_set(set_name);
+	if (cmd == NULL)
+		return RMAP_RULE_MISSING;
+
+	/* Next call compile function for this match statement. */
+	if (cmd->func_compile) {
+		compile = (*cmd->func_compile)(set_arg);
+		if (compile == NULL)
+			return RMAP_COMPILE_ERROR;
+	} else
+		compile = NULL;
+
+	/* Add by WJL. if old set command of same kind exist, delete it first
+	   to ensure only one set command of same kind exist under a
+	   route_map_index. */
+	for (rule = index->set_list.head; rule; rule = next) {
+		next = rule->next;
+		if (rule->cmd == cmd)
+			route_map_rule_delete(&index->set_list, rule);
+	}
+
+	/* Add new route map match rule. */
+	rule = route_map_rule_new();
+	rule->cmd = cmd;
+	rule->value = compile;
+	if (set_arg)
+		rule->rule_str = XSTRDUP(MTYPE_ROUTE_MAP_RULE_STR, set_arg);
+	else
+		rule->rule_str = NULL;
+
+	/* Add new route match rule to linked list. */
+	route_map_rule_add(&index->set_list, rule);
+
+	/* Execute event hook. */
+	if (route_map_master.event_hook) {
+		(*route_map_master.event_hook)(index->map->name);
+		route_map_notify_dependencies(index->map->name,
+					      RMAP_EVENT_CALL_ADDED);
+	}
+	return RMAP_COMPILE_SUCCESS;
+}
+
+/* Delete route map set rule. */
+enum rmap_compile_rets route_map_delete_set(struct route_map_index *index,
+					    const char *set_name,
+					    const char *set_arg)
+{
+	struct route_map_rule *rule;
+	const struct route_map_rule_cmd *cmd;
+
+	cmd = route_map_lookup_set(set_name);
+	if (cmd == NULL)
+		return RMAP_RULE_MISSING;
+
+	for (rule = index->set_list.head; rule; rule = rule->next)
+		if ((rule->cmd == cmd) && (rulecmp(rule->rule_str, set_arg) == 0
+					   || set_arg == NULL)) {
+			route_map_rule_delete(&index->set_list, rule);
+			/* Execute event hook. */
+			if (route_map_master.event_hook) {
+				(*route_map_master.event_hook)(index->map->name);
+				route_map_notify_dependencies(
+					index->map->name,
+					RMAP_EVENT_CALL_ADDED);
+			}
+			return RMAP_COMPILE_SUCCESS;
+		}
+	/* Can't find matched rule. */
+	return RMAP_RULE_MISSING;
+}
+
+static enum route_map_cmd_result_t
+route_map_apply_match(struct route_map_rule_list *match_list,
+		      const struct prefix *prefix, void *object)
+{
+	enum route_map_cmd_result_t ret = RMAP_NOMATCH;
+	struct route_map_rule *match;
+	bool is_matched = false;
+
+
+	/* Check all match rule and if there is no match rule, go to the
+	   set statement. */
+	if (!match_list->head)
+		ret = RMAP_MATCH;
+	else {
+		for (match = match_list->head; match; match = match->next) {
+			/*
+			 * Try each match statement. If any match does not
+			 * return RMAP_MATCH or RMAP_NOOP, return.
+			 * Otherwise continue on to next match statement.
+			 * All match statements must MATCH for
+			 * end-result to be a match.
+			 * (Exception:If match stmts result in a mix of
+			 * MATCH/NOOP, then also end-result is a match)
+			 * If all result in NOOP, end-result is NOOP.
+			 */
+			ret = (*match->cmd->func_apply)(match->value, prefix,
+							object);
+
+			/*
+			 * If the consolidated result of func_apply is:
+			 *   -----------------------------------------------
+			 *   |  MATCH  | NOMATCH  |  NOOP   |  Final Result |
+			 *   ------------------------------------------------
+			 *   |   yes   |   yes    |  yes    |     NOMATCH   |
+			 *   |   no    |   no     |  yes    |     NOOP      |
+			 *   |   yes   |   no     |  yes    |     MATCH     |
+			 *   |   no    |   yes    |  yes    |     NOMATCH   |
+			 *   |-----------------------------------------------
+			 *
+			 *  Traditionally, all rules within route-map
+			 *  should match for it to MATCH.
+			 *  If there are noops within the route-map rules,
+			 *  it follows the above matrix.
+			 *
+			 *   Eg: route-map rm1 permit 10
+			 *         match rule1
+			 *         match rule2
+			 *         match rule3
+			 *         ....
+			 *       route-map rm1 permit 20
+			 *         match ruleX
+			 *         match ruleY
+			 *         ...
+			 */
+
+			switch (ret) {
+			case RMAP_MATCH:
+				is_matched = true;
+				break;
+
+			case RMAP_NOMATCH:
+				return ret;
+
+			case RMAP_NOOP:
+				if (is_matched)
+					ret = RMAP_MATCH;
+				break;
+
+			case RMAP_OKAY:
+			case RMAP_ERROR:
+				break;
+			}
+
+		}
+	}
+	return ret;
+}
+
+static struct list *route_map_get_index_list(struct route_node **rn,
+					     const struct prefix *prefix,
+					     struct route_table *table)
+{
+	struct route_node *tmp_rn = NULL;
+
+	if (!(*rn)) {
+		*rn = route_node_match(table, prefix);
+
+		if (!(*rn))
+			return NULL;
+
+		if ((*rn)->info)
+			return (struct list *)((*rn)->info);
+
+		/* If rn->info is NULL, get the parent.
+		 * Store the rn in tmp_rn and unlock it later.
+		 */
+		tmp_rn = *rn;
+	}
+
+	do {
+		*rn = (*rn)->parent;
+		if (tmp_rn)
+			route_unlock_node(tmp_rn);
+
+		if (!(*rn))
+			break;
+
+		if ((*rn)->info) {
+			route_lock_node(*rn);
+			return (struct list *)((*rn)->info);
+		}
+	} while (!(*rn)->info);
+
+	return NULL;
+}
+
+/*
+ * This function returns the route-map index that best matches the prefix.
+ */
+static struct route_map_index *
+route_map_get_index(struct route_map *map, const struct prefix *prefix,
+		    void *object, enum route_map_cmd_result_t *match_ret)
+{
+	enum route_map_cmd_result_t ret = RMAP_NOMATCH;
+	struct list *candidate_rmap_list = NULL;
+	struct route_node *rn = NULL;
+	struct listnode *ln = NULL, *nn = NULL;
+	struct route_map_index *index = NULL, *best_index = NULL;
+	struct route_map_index *head_index = NULL;
+	struct route_table *table = NULL;
+
+	/* Route-map optimization relies on LPM lookups of the prefix to reduce
+	 * the amount of route-map clauses a given prefix needs to be processed
+	 * against. These LPM trees are IPv4/IPv6-specific and prefix->family
+	 * must be AF_INET or AF_INET6 in order for the lookup to succeed. So if
+	 * the AF doesn't line up with the LPM trees, skip the optimization.
+	 */
+	if (map->optimization_disabled) {
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP_DETAIL)))
+			zlog_debug(
+				"Skipping route-map optimization for route-map: %s, pfx: %pFX, family: %d",
+				map->name, prefix, prefix->family);
+		return map->head;
+	}
+
+	if (prefix->family == AF_INET)
+		table = map->ipv4_prefix_table;
+	else
+		table = map->ipv6_prefix_table;
+
+	do {
+		candidate_rmap_list =
+			route_map_get_index_list(&rn, prefix, table);
+		if (!rn)
+			break;
+
+		/* If the index at the head of the list is of seq higher
+		 * than that in best_index, ignore the list and get the
+		 * parent node's list.
+		 */
+		head_index = (struct route_map_index *)(listgetdata(
+			listhead(candidate_rmap_list)));
+		if (best_index && head_index
+		    && (best_index->pref < head_index->pref)) {
+			route_unlock_node(rn);
+			continue;
+		}
+
+		for (ALL_LIST_ELEMENTS(candidate_rmap_list, ln, nn, index)) {
+			/* If the index is of seq higher than that in
+			 * best_index, ignore the list and get the parent
+			 * node's list.
+			 */
+			if (best_index && (best_index->pref < index->pref))
+				break;
+
+			ret = route_map_apply_match(&index->match_list, prefix,
+						    object);
+
+			if (ret == RMAP_MATCH) {
+				*match_ret = ret;
+				best_index = index;
+				break;
+			} else if (ret == RMAP_NOOP) {
+				/*
+				 * If match_ret is denymatch, even if we see
+				 * more noops, we retain this return value and
+				 * return this eventually if there are no
+				 * matches.
+				 * If a best match route-map index already
+				 * exists, do not reset the match_ret.
+				 */
+				if (!best_index && (*match_ret != RMAP_NOMATCH))
+					*match_ret = ret;
+			} else {
+				/*
+				 * ret is RMAP_NOMATCH.
+				 * If a best match route-map index already
+				 * exists, do not reset the match_ret.
+				 */
+				if (!best_index)
+					*match_ret = ret;
+			}
+		}
+
+		route_unlock_node(rn);
+
+	} while (rn);
+
+	return best_index;
+}
+
+static int route_map_candidate_list_cmp(struct route_map_index *idx1,
+					struct route_map_index *idx2)
+{
+	return idx1->pref - idx2->pref;
+}
+
+/*
+ * This function adds the route-map index into the default route's
+ * route-node in the route-map's IPv4/IPv6 prefix-table.
+ */
+static void route_map_pfx_table_add_default(afi_t afi,
+					    struct route_map_index *index)
+{
+	struct route_node *rn = NULL;
+	struct list *rmap_candidate_list = NULL;
+	struct prefix p;
+	bool updated_rn = false;
+	struct route_table *table = NULL;
+
+	memset(&p, 0, sizeof(p));
+	p.family = afi2family(afi);
+	p.prefixlen = 0;
+
+	if (p.family == AF_INET)
+		table = index->map->ipv4_prefix_table;
+	else
+		table = index->map->ipv6_prefix_table;
+
+	/* Add default route to table */
+	rn = route_node_get(table, &p);
+
+	if (!rn)
+		return;
+
+	if (!rn->info) {
+		rmap_candidate_list = list_new();
+		rmap_candidate_list->cmp =
+			(int (*)(void *, void *))route_map_candidate_list_cmp;
+		rn->info = rmap_candidate_list;
+	} else {
+		rmap_candidate_list = (struct list *)rn->info;
+		updated_rn = true;
+	}
+
+	listnode_add_sort_nodup(rmap_candidate_list, index);
+	if (updated_rn)
+		route_unlock_node(rn);
+}
+
+/*
+ * This function removes the route-map index from the default route's
+ * route-node in the route-map's IPv4/IPv6 prefix-table.
+ */
+static void route_map_pfx_table_del_default(afi_t afi,
+					    struct route_map_index *index)
+{
+	struct route_node *rn = NULL;
+	struct list *rmap_candidate_list = NULL;
+	struct prefix p;
+	struct route_table *table = NULL;
+
+	memset(&p, 0, sizeof(p));
+	p.family = afi2family(afi);
+	p.prefixlen = 0;
+
+	if (p.family == AF_INET)
+		table = index->map->ipv4_prefix_table;
+	else
+		table = index->map->ipv6_prefix_table;
+
+	/* Remove RMAP index from default route in table */
+	rn = route_node_lookup(table, &p);
+	if (!rn || !rn->info)
+		return;
+
+	rmap_candidate_list = (struct list *)rn->info;
+
+	listnode_delete(rmap_candidate_list, index);
+
+	if (listcount(rmap_candidate_list) == 0) {
+		list_delete(&rmap_candidate_list);
+		rn->info = NULL;
+		route_unlock_node(rn);
+	}
+	route_unlock_node(rn);
+}
+
+/*
+ * This function adds the route-map index to the route-node for
+ * the prefix-entry in the route-map's IPv4/IPv6 prefix-table.
+ */
+static void route_map_pfx_table_add(struct route_table *table,
+				    struct route_map_index *index,
+				    struct prefix_list_entry *pentry)
+{
+	struct route_node *rn = NULL;
+	struct list *rmap_candidate_list = NULL;
+	bool updated_rn = false;
+
+	rn = route_node_get(table, &pentry->prefix);
+	if (!rn)
+		return;
+
+	if (!rn->info) {
+		rmap_candidate_list = list_new();
+		rmap_candidate_list->cmp =
+			(int (*)(void *, void *))route_map_candidate_list_cmp;
+		rn->info = rmap_candidate_list;
+	} else {
+		rmap_candidate_list = (struct list *)rn->info;
+		updated_rn = true;
+	}
+
+	listnode_add_sort_nodup(rmap_candidate_list, index);
+	if (updated_rn)
+		route_unlock_node(rn);
+}
+
+/*
+ * This function removes the route-map index from the route-node for
+ * the prefix-entry in the route-map's IPv4/IPv6 prefix-table.
+ */
+static void route_map_pfx_table_del(struct route_table *table,
+				    struct route_map_index *index,
+				    struct prefix_list_entry *pentry)
+{
+	struct route_node *rn = NULL;
+	struct list *rmap_candidate_list = NULL;
+
+	rn = route_node_lookup(table, &pentry->prefix);
+	if (!rn || !rn->info)
+		return;
+
+	rmap_candidate_list = (struct list *)rn->info;
+
+	listnode_delete(rmap_candidate_list, index);
+
+	if (listcount(rmap_candidate_list) == 0) {
+		list_delete(&rmap_candidate_list);
+		rn->info = NULL;
+		route_unlock_node(rn);
+	}
+	route_unlock_node(rn);
+}
+
+/* This function checks for the presence of an IPv4 prefix-list
+ * match rule in the given route-map index.
+ */
+static bool route_map_is_ip_pfx_list_rule_present(struct route_map_index *index)
+{
+	struct route_map_rule_list *match_list = NULL;
+	struct route_map_rule *rule = NULL;
+
+	match_list = &index->match_list;
+	for (rule = match_list->head; rule; rule = rule->next)
+		if (IS_RULE_IPv4_PREFIX_LIST(rule->cmd->str))
+			return true;
+
+	return false;
+}
+
+/* This function checks for the presence of an IPv6 prefix-list
+ * match rule in the given route-map index.
+ */
+static bool
+route_map_is_ipv6_pfx_list_rule_present(struct route_map_index *index)
+{
+	struct route_map_rule_list *match_list = NULL;
+	struct route_map_rule *rule = NULL;
+
+	match_list = &index->match_list;
+	for (rule = match_list->head; rule; rule = rule->next)
+		if (IS_RULE_IPv6_PREFIX_LIST(rule->cmd->str))
+			return true;
+
+	return false;
+}
+
+/* This function does the following:
+ * 1) If plist_name is not present, search for a IPv4 or IPv6 prefix-list
+ *    match clause (based on the afi passed to this foo) and get the
+ *    prefix-list name.
+ * 2) Look up the prefix-list using the name.
+ * 3) If the prefix-list is not found then, add the index to the IPv4/IPv6
+ *    default-route's node in the trie (based on the afi passed to this foo).
+ * 4) If the prefix-list is found then, remove the index from the IPv4/IPv6
+ *    default-route's node in the trie (based on the afi passed to this foo).
+ * 5) If a prefix-entry is passed then, create a route-node for this entry and
+ *    add this index to the route-node.
+ * 6) If prefix-entry is not passed then, for every prefix-entry in the
+ *    prefix-list, create a route-node for this entry and
+ *    add this index to the route-node.
+ */
+static void route_map_add_plist_entries(afi_t afi,
+					struct route_map_index *index,
+					const char *plist_name,
+					struct prefix_list_entry *entry)
+{
+	struct route_map_rule_list *match_list = NULL;
+	struct route_map_rule *match = NULL;
+	struct prefix_list *plist = NULL;
+	struct prefix_list_entry *pentry = NULL;
+	bool plist_rule_is_present = false;
+
+	if (!plist_name) {
+		match_list = &index->match_list;
+
+		for (match = match_list->head; match; match = match->next) {
+			if (afi == AFI_IP) {
+				if (IS_RULE_IPv4_PREFIX_LIST(match->cmd->str)) {
+					plist_rule_is_present = true;
+					break;
+				}
+			} else {
+				if (IS_RULE_IPv6_PREFIX_LIST(match->cmd->str)) {
+					plist_rule_is_present = true;
+					break;
+				}
+			}
+		}
+
+		if (plist_rule_is_present)
+			plist = prefix_list_lookup(afi, match->rule_str);
+	} else {
+		plist = prefix_list_lookup(afi, plist_name);
+	}
+
+	if (!plist) {
+		route_map_pfx_table_add_default(afi, index);
+		return;
+	}
+
+	/* Default entry should be deleted only if the first entry of the
+	 * prefix-list is created.
+	 */
+	if (entry) {
+		if (plist->count == 1)
+			route_map_pfx_table_del_default(afi, index);
+	} else {
+		route_map_pfx_table_del_default(afi, index);
+	}
+
+	if (entry) {
+		if (afi == AFI_IP) {
+			route_map_pfx_table_add(index->map->ipv4_prefix_table,
+						index, entry);
+		} else {
+			route_map_pfx_table_add(index->map->ipv6_prefix_table,
+						index, entry);
+		}
+	} else {
+		for (pentry = plist->head; pentry; pentry = pentry->next) {
+			if (afi == AFI_IP) {
+				route_map_pfx_table_add(
+					index->map->ipv4_prefix_table, index,
+					pentry);
+			} else {
+				route_map_pfx_table_add(
+					index->map->ipv6_prefix_table, index,
+					pentry);
+			}
+		}
+	}
+}
+
+/* This function does the following:
+ * 1) If plist_name is not present, search for a IPv4 or IPv6 prefix-list
+ *    match clause (based on the afi passed to this foo) and get the
+ *    prefix-list name.
+ * 2) Look up the prefix-list using the name.
+ * 3) If the prefix-list is not found then, delete the index from the IPv4/IPv6
+ *    default-route's node in the trie (based on the afi passed to this foo).
+ * 4) If a prefix-entry is passed then, remove this index from the route-node
+ *    for the prefix in this prefix-entry.
+ * 5) If prefix-entry is not passed then, for every prefix-entry in the
+ *    prefix-list, remove this index from the route-node
+ *    for the prefix in this prefix-entry.
+ */
+static void route_map_del_plist_entries(afi_t afi,
+					struct route_map_index *index,
+					const char *plist_name,
+					struct prefix_list_entry *entry)
+{
+	struct route_map_rule_list *match_list = NULL;
+	struct route_map_rule *match = NULL;
+	struct prefix_list *plist = NULL;
+	struct prefix_list_entry *pentry = NULL;
+	bool plist_rule_is_present = false;
+
+	if (!plist_name) {
+		match_list = &index->match_list;
+
+		for (match = match_list->head; match; match = match->next) {
+			if (afi == AFI_IP) {
+				if (IS_RULE_IPv4_PREFIX_LIST(match->cmd->str)) {
+					plist_rule_is_present = true;
+					break;
+				}
+			} else {
+				if (IS_RULE_IPv6_PREFIX_LIST(match->cmd->str)) {
+					plist_rule_is_present = true;
+					break;
+				}
+			}
+		}
+
+		if (plist_rule_is_present)
+			plist = prefix_list_lookup(afi, match->rule_str);
+	} else {
+		plist = prefix_list_lookup(afi, plist_name);
+	}
+
+	if (!plist) {
+		route_map_pfx_table_del_default(afi, index);
+		return;
+	}
+
+	if (entry) {
+		if (afi == AFI_IP) {
+			route_map_pfx_table_del(index->map->ipv4_prefix_table,
+						index, entry);
+		} else {
+			route_map_pfx_table_del(index->map->ipv6_prefix_table,
+						index, entry);
+		}
+	} else {
+		for (pentry = plist->head; pentry; pentry = pentry->next) {
+			if (afi == AFI_IP) {
+				route_map_pfx_table_del(
+					index->map->ipv4_prefix_table, index,
+					pentry);
+			} else {
+				route_map_pfx_table_del(
+					index->map->ipv6_prefix_table, index,
+					pentry);
+			}
+		}
+	}
+}
+
+/*
+ * This function handles the cases where a prefix-list is added/removed
+ * as a match command from a particular route-map index.
+ * It updates the prefix-table of the route-map accordingly.
+ */
+static void route_map_trie_update(afi_t afi, route_map_event_t event,
+				  struct route_map_index *index,
+				  const char *plist_name)
+{
+	if (event == RMAP_EVENT_PLIST_ADDED) {
+		if (afi == AFI_IP) {
+			if (!route_map_is_ipv6_pfx_list_rule_present(index)) {
+				route_map_pfx_table_del_default(AFI_IP6, index);
+				route_map_add_plist_entries(afi, index,
+							    plist_name, NULL);
+			} else {
+				route_map_del_plist_entries(AFI_IP6, index,
+							    NULL, NULL);
+			}
+		} else {
+			if (!route_map_is_ip_pfx_list_rule_present(index)) {
+				route_map_pfx_table_del_default(AFI_IP, index);
+				route_map_add_plist_entries(afi, index,
+							    plist_name, NULL);
+			} else {
+				route_map_del_plist_entries(AFI_IP, index, NULL,
+							    NULL);
+			}
+		}
+	} else if (event == RMAP_EVENT_PLIST_DELETED) {
+		if (afi == AFI_IP) {
+			route_map_del_plist_entries(afi, index, plist_name,
+						    NULL);
+
+			/* If IPv6 prefix-list match rule is not present,
+			 * add this index to the IPv4 default route's trie
+			 * node.
+			 * Also, add this index to the trie nodes created
+			 * for each of the prefix-entries within the IPv6
+			 * prefix-list, if the IPv6 prefix-list match rule
+			 * is present. Else, add this index to the IPv6
+			 * default route's trie node.
+			 */
+			if (!route_map_is_ipv6_pfx_list_rule_present(index))
+				route_map_pfx_table_add_default(afi, index);
+
+			route_map_add_plist_entries(AFI_IP6, index, NULL, NULL);
+		} else {
+			route_map_del_plist_entries(afi, index, plist_name,
+						    NULL);
+
+			/* If IPv4 prefix-list match rule is not present,
+			 * add this index to the IPv6 default route's trie
+			 * node.
+			 * Also, add this index to the trie nodes created
+			 * for each of the prefix-entries within the IPv4
+			 * prefix-list, if the IPv4 prefix-list match rule
+			 * is present. Else, add this index to the IPv4
+			 * default route's trie node.
+			 */
+			if (!route_map_is_ip_pfx_list_rule_present(index))
+				route_map_pfx_table_add_default(afi, index);
+
+			route_map_add_plist_entries(AFI_IP, index, NULL, NULL);
+		}
+	}
+}
+
+/*
+ * This function handles the cases where a route-map index and
+ * prefix-list is added/removed.
+ * It updates the prefix-table of the route-map accordingly.
+ */
+static void route_map_pfx_tbl_update(route_map_event_t event,
+				     struct route_map_index *index, afi_t afi,
+				     const char *plist_name)
+{
+	if (!index)
+		return;
+
+	if (event == RMAP_EVENT_INDEX_ADDED) {
+		route_map_pfx_table_add_default(AFI_IP, index);
+		route_map_pfx_table_add_default(AFI_IP6, index);
+		return;
+	}
+
+	if (event == RMAP_EVENT_INDEX_DELETED) {
+		route_map_pfx_table_del_default(AFI_IP, index);
+		route_map_pfx_table_del_default(AFI_IP6, index);
+
+		return;
+	}
+
+	/* Handle prefix-list match rule addition/deletion.
+	 */
+	route_map_trie_update(afi, event, index, plist_name);
+}
+
+/*
+ * This function handles the cases where a new prefix-entry is added to
+ * a prefix-list or, an existing prefix-entry is removed from the prefix-list.
+ * It updates the prefix-table of the route-map accordingly.
+ */
+static void route_map_pentry_update(route_map_event_t event,
+				    const char *plist_name,
+				    struct route_map_index *index,
+				    struct prefix_list_entry *pentry)
+{
+	struct prefix_list *plist = NULL;
+	afi_t afi;
+	unsigned char family = pentry->prefix.family;
+
+	if (family == AF_INET) {
+		afi = AFI_IP;
+		plist = prefix_list_lookup(AFI_IP, plist_name);
+	} else {
+		afi = AFI_IP6;
+		plist = prefix_list_lookup(AFI_IP6, plist_name);
+	}
+
+	if (event == RMAP_EVENT_PLIST_ADDED) {
+		if (afi == AFI_IP) {
+			if (!route_map_is_ipv6_pfx_list_rule_present(index))
+				route_map_add_plist_entries(afi, index,
+							    plist_name, pentry);
+		} else {
+			if (!route_map_is_ip_pfx_list_rule_present(index))
+				route_map_add_plist_entries(afi, index,
+							    plist_name, pentry);
+		}
+	} else if (event == RMAP_EVENT_PLIST_DELETED) {
+		route_map_del_plist_entries(afi, index, plist_name, pentry);
+
+		if (plist->count == 1) {
+			if (afi == AFI_IP) {
+				if (!route_map_is_ipv6_pfx_list_rule_present(
+					    index))
+					route_map_pfx_table_add_default(afi,
+									index);
+			} else {
+				if (!route_map_is_ip_pfx_list_rule_present(
+					    index))
+					route_map_pfx_table_add_default(afi,
+									index);
+			}
+		}
+	}
+}
+
+static void route_map_pentry_process_dependency(struct hash_bucket *bucket,
+						void *data)
+{
+	char *rmap_name = NULL;
+	struct route_map *rmap = NULL;
+	struct route_map_index *index = NULL;
+	struct route_map_rule_list *match_list = NULL;
+	struct route_map_rule *match = NULL;
+	struct route_map_dep_data *dep_data = NULL;
+	struct route_map_pentry_dep *pentry_dep =
+		(struct route_map_pentry_dep *)data;
+	unsigned char family = pentry_dep->pentry->prefix.family;
+
+	dep_data = (struct route_map_dep_data *)bucket->data;
+	if (!dep_data)
+		return;
+
+	rmap_name = dep_data->rname;
+	rmap = route_map_lookup_by_name(rmap_name);
+	if (!rmap || !rmap->head)
+		return;
+
+	for (index = rmap->head; index; index = index->next) {
+		match_list = &index->match_list;
+
+		if (!match_list)
+			continue;
+
+		for (match = match_list->head; match; match = match->next) {
+			if (strcmp(match->rule_str, pentry_dep->plist_name)
+			    == 0) {
+				if (IS_RULE_IPv4_PREFIX_LIST(match->cmd->str)
+				    && family == AF_INET) {
+					route_map_pentry_update(
+						pentry_dep->event,
+						pentry_dep->plist_name, index,
+						pentry_dep->pentry);
+				} else if (IS_RULE_IPv6_PREFIX_LIST(
+						   match->cmd->str)
+					   && family == AF_INET6) {
+					route_map_pentry_update(
+						pentry_dep->event,
+						pentry_dep->plist_name, index,
+						pentry_dep->pentry);
+				}
+			}
+		}
+	}
+}
+
+void route_map_notify_pentry_dependencies(const char *affected_name,
+					  struct prefix_list_entry *pentry,
+					  route_map_event_t event)
+{
+	struct route_map_dep *dep = NULL;
+	struct hash *upd8_hash = NULL;
+	struct route_map_pentry_dep pentry_dep;
+
+	if (!affected_name || !pentry)
+		return;
+
+	upd8_hash = route_map_get_dep_hash(event);
+	if (!upd8_hash)
+		return;
+
+	dep = (struct route_map_dep *)hash_get(upd8_hash, (void *)affected_name,
+					       NULL);
+	if (dep) {
+		if (!dep->this_hash)
+			dep->this_hash = upd8_hash;
+
+		memset(&pentry_dep, 0, sizeof(pentry_dep));
+		pentry_dep.pentry = pentry;
+		pentry_dep.plist_name = affected_name;
+		pentry_dep.event = event;
+
+		hash_iterate(dep->dep_rmap_hash,
+			     route_map_pentry_process_dependency,
+			     (void *)&pentry_dep);
+	}
+}
+
+/* Apply route map's each index to the object.
+
+   The matrix for a route-map looks like this:
+   (note, this includes the description for the "NEXT"
+   and "GOTO" frobs now
+
+	   |   Match   |   No Match   | No op
+	   |-----------|--------------|-------
+    permit |   action  |     cont     | cont.
+	   |           | default:deny | default:permit
+    -------------------+-----------------------
+	   |   deny    |     cont     | cont.
+    deny   |           | default:deny | default:permit
+	   |-----------|--------------|--------
+
+   action)
+      -Apply Set statements, accept route
+      -If Call statement is present jump to the specified route-map, if it
+	 denies the route we finish.
+      -If NEXT is specified, goto NEXT statement
+      -If GOTO is specified, goto the first clause where pref > nextpref
+      -If nothing is specified, do as Cisco and finish
+   deny)
+      -Route is denied by route-map.
+   cont)
+      -Goto Next index
+
+   If we get no matches after we've processed all updates, then the route
+   is dropped too.
+
+   Some notes on the new "CALL", "NEXT" and "GOTO"
+     call WORD        - If this clause is matched, then the set statements
+			are executed and then we jump to route-map 'WORD'. If
+			this route-map denies the route, we finish, in other
+   case we
+			do whatever the exit policy (EXIT, NEXT or GOTO) tells.
+     on-match next    - If this clause is matched, then the set statements
+			are executed and then we drop through to the next clause
+     on-match goto n  - If this clause is matched, then the set statements
+			are executed and then we goto the nth clause, or the
+			first clause greater than this. In order to ensure
+			route-maps *always* exit, you cannot jump backwards.
+			Sorry ;)
+
+   We need to make sure our route-map processing matches the above
+*/
+route_map_result_t route_map_apply_ext(struct route_map *map,
+				       const struct prefix *prefix,
+				       void *match_object, void *set_object,
+				       int *pref)
+{
+	static int recursion = 0;
+	enum route_map_cmd_result_t match_ret = RMAP_NOMATCH;
+	route_map_result_t ret = RMAP_PERMITMATCH;
+	struct route_map_index *index = NULL;
+	struct route_map_rule *set = NULL;
+	bool skip_match_clause = false;
+	struct prefix conv;
+
+	if (recursion > RMAP_RECURSION_LIMIT) {
+		if (map)
+			map->applied++;
+
+		flog_warn(
+			EC_LIB_RMAP_RECURSION_LIMIT,
+			"route-map recursion limit (%d) reached, discarding route",
+			RMAP_RECURSION_LIMIT);
+		recursion = 0;
+		return RMAP_DENYMATCH;
+	}
+
+	if (map == NULL || map->head == NULL) {
+		if (map)
+			map->applied++;
+		ret = RMAP_DENYMATCH;
+		goto route_map_apply_end;
+	}
+
+	map->applied++;
+
+	/*
+	 * Handling for matching evpn_routes in the prefix table.
+	 *
+	 * We convert type2/5 prefix to ipv4/6 prefix to do longest
+	 * prefix matching on.
+	 */
+	if (prefix->family == AF_EVPN) {
+		if (evpn_prefix2prefix(prefix, &conv) != 0) {
+			if (unlikely(CHECK_FLAG(rmap_debug,
+						DEBUG_ROUTEMAP_DETAIL)))
+				zlog_debug(
+					"Unable to convert EVPN prefix %pFX into IPv4/IPv6 prefix. Falling back to non-optimized route-map lookup",
+					prefix);
+		} else {
+			if (unlikely(CHECK_FLAG(rmap_debug,
+						DEBUG_ROUTEMAP_DETAIL)))
+				zlog_debug(
+					"Converted EVPN prefix %pFX into %pFX for optimized route-map lookup",
+					prefix, &conv);
+
+			prefix = &conv;
+		}
+	}
+
+	index = route_map_get_index(map, prefix, match_object, &match_ret);
+	if (index) {
+		index->applied++;
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug(
+				"Best match route-map: %s, sequence: %d for pfx: %pFX, result: %s",
+				map->name, index->pref, prefix,
+				route_map_cmd_result_str(match_ret));
+	} else {
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug(
+				"No best match sequence for pfx: %pFX in route-map: %s, result: %s",
+				prefix, map->name,
+				route_map_cmd_result_str(match_ret));
+		/*
+		 * No index matches this prefix. Return deny unless,
+		 * match_ret = RMAP_NOOP.
+		 */
+		if (match_ret == RMAP_NOOP)
+			ret = RMAP_PERMITMATCH;
+		else
+			ret = RMAP_DENYMATCH;
+		goto route_map_apply_end;
+	}
+	skip_match_clause = true;
+
+	for (; index; index = index->next) {
+		if (!skip_match_clause) {
+			index->applied++;
+			/* Apply this index. */
+			match_ret = route_map_apply_match(&index->match_list,
+							  prefix, match_object);
+			if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP))) {
+				zlog_debug(
+					"Route-map: %s, sequence: %d, prefix: %pFX, result: %s",
+					map->name, index->pref, prefix,
+					route_map_cmd_result_str(match_ret));
+			}
+		} else
+			skip_match_clause = false;
+
+
+		/* Now we apply the matrix from above */
+		if (match_ret == RMAP_NOOP)
+			/*
+			 * Do not change the return value. Retain the previous
+			 * return value. Previous values can be:
+			 * 1)permitmatch (if a nomatch was never
+			 * seen before in this route-map.)
+			 * 2)denymatch (if a nomatch was seen earlier in one
+			 * of the previous sequences)
+			 */
+
+			/*
+			 * 'cont' from matrix - continue to next route-map
+			 * sequence
+			 */
+			continue;
+		else if (match_ret == RMAP_NOMATCH) {
+
+			/*
+			 * The return value is now changed to denymatch.
+			 * So from here on out, even if we see more noops,
+			 * we retain this return value and return this
+			 * eventually if there are no matches.
+			 */
+			ret = RMAP_DENYMATCH;
+
+			/*
+			 * 'cont' from matrix - continue to next route-map
+			 * sequence
+			 */
+			continue;
+		} else if (match_ret == RMAP_MATCH) {
+			if (index->type == RMAP_PERMIT)
+			/* 'action' */
+			{
+				/* Match succeeded, rmap is of type permit */
+				ret = RMAP_PERMITMATCH;
+
+				/* permit+match must execute sets */
+				for (set = index->set_list.head; set;
+				     set = set->next)
+					/*
+					 * set cmds return RMAP_OKAY or
+					 * RMAP_ERROR. We do not care if
+					 * set succeeded or not. So, ignore
+					 * return code.
+					 */
+					(void)(*set->cmd->func_apply)(
+						set->value, prefix, set_object);
+
+				/* Call another route-map if available */
+				if (index->nextrm) {
+					struct route_map *nextrm =
+						route_map_lookup_by_name(
+							index->nextrm);
+
+					if (nextrm) /* Target route-map found,
+						       jump to it */
+					{
+						recursion++;
+						ret = route_map_apply_ext(
+							nextrm, prefix,
+							match_object,
+							set_object, NULL);
+						recursion--;
+					}
+
+					/* If nextrm returned 'deny', finish. */
+					if (ret == RMAP_DENYMATCH)
+						goto route_map_apply_end;
+				}
+
+				switch (index->exitpolicy) {
+				case RMAP_EXIT:
+					goto route_map_apply_end;
+				case RMAP_NEXT:
+					continue;
+				case RMAP_GOTO: {
+					/* Find the next clause to jump to */
+					struct route_map_index *next =
+						index->next;
+					int nextpref = index->nextpref;
+
+					while (next && next->pref < nextpref) {
+						index = next;
+						next = next->next;
+					}
+					if (next == NULL) {
+						/* No clauses match! */
+						goto route_map_apply_end;
+					}
+				}
+				}
+			} else if (index->type == RMAP_DENY)
+			/* 'deny' */
+			{
+				ret = RMAP_DENYMATCH;
+				goto route_map_apply_end;
+			}
+		}
+	}
+
+route_map_apply_end:
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Route-map: %s, prefix: %pFX, result: %s",
+			   (map ? map->name : "null"), prefix,
+			   route_map_result_str(ret));
+
+	if (pref) {
+		if (index != NULL && ret == RMAP_PERMITMATCH)
+			*pref = index->pref;
+		else
+			*pref = 65536;
+	}
+
+	return (ret);
+}
+
+void route_map_add_hook(void (*func)(const char *))
+{
+	route_map_master.add_hook = func;
+}
+
+void route_map_delete_hook(void (*func)(const char *))
+{
+	route_map_master.delete_hook = func;
+}
+
+void route_map_event_hook(void (*func)(const char *name))
+{
+	route_map_master.event_hook = func;
+}
+
+/* Routines for route map dependency lists and dependency processing */
+static bool route_map_rmap_hash_cmp(const void *p1, const void *p2)
+{
+	return strcmp(((const struct route_map_dep_data *)p1)->rname,
+		      ((const struct route_map_dep_data *)p2)->rname)
+	       == 0;
+}
+
+static bool route_map_dep_hash_cmp(const void *p1, const void *p2)
+{
+
+	return (strcmp(((const struct route_map_dep *)p1)->dep_name,
+		       (const char *)p2)
+		== 0);
+}
+
+static void route_map_clear_reference(struct hash_bucket *bucket, void *arg)
+{
+	struct route_map_dep *dep = bucket->data;
+	struct route_map_dep_data *dep_data = NULL, tmp_dep_data;
+
+	memset(&tmp_dep_data, 0, sizeof(tmp_dep_data));
+	tmp_dep_data.rname = arg;
+	dep_data = hash_release(dep->dep_rmap_hash, &tmp_dep_data);
+	if (dep_data) {
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug("Clearing reference for %s to %s count: %d",
+				   dep->dep_name, tmp_dep_data.rname,
+				   dep_data->refcnt);
+
+		XFREE(MTYPE_ROUTE_MAP_NAME, dep_data->rname);
+		XFREE(MTYPE_ROUTE_MAP_DEP_DATA, dep_data);
+	}
+	if (!dep->dep_rmap_hash->count) {
+		dep = hash_release(dep->this_hash, (void *)dep->dep_name);
+		hash_free(dep->dep_rmap_hash);
+		XFREE(MTYPE_ROUTE_MAP_NAME, dep->dep_name);
+		XFREE(MTYPE_ROUTE_MAP_DEP, dep);
+	}
+}
+
+static void route_map_clear_all_references(char *rmap_name)
+{
+	int i;
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Clearing references for %s", rmap_name);
+
+	for (i = 1; i < ROUTE_MAP_DEP_MAX; i++) {
+		hash_iterate(route_map_dep_hash[i], route_map_clear_reference,
+			     (void *)rmap_name);
+	}
+}
+
+static unsigned int route_map_dep_data_hash_make_key(const void *p)
+{
+	const struct route_map_dep_data *dep_data = p;
+
+	return string_hash_make(dep_data->rname);
+}
+
+static void *route_map_dep_hash_alloc(void *p)
+{
+	char *dep_name = (char *)p;
+	struct route_map_dep *dep_entry;
+
+	dep_entry = XCALLOC(MTYPE_ROUTE_MAP_DEP, sizeof(struct route_map_dep));
+	dep_entry->dep_name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, dep_name);
+	dep_entry->dep_rmap_hash =
+		hash_create_size(8, route_map_dep_data_hash_make_key,
+				 route_map_rmap_hash_cmp, "Route Map Dep Hash");
+	dep_entry->this_hash = NULL;
+
+	return dep_entry;
+}
+
+static void *route_map_name_hash_alloc(void *p)
+{
+	struct route_map_dep_data *dep_data = NULL, *tmp_dep_data = NULL;
+
+	dep_data = XCALLOC(MTYPE_ROUTE_MAP_DEP_DATA,
+			   sizeof(struct route_map_dep_data));
+	tmp_dep_data = p;
+	dep_data->rname = XSTRDUP(MTYPE_ROUTE_MAP_NAME, tmp_dep_data->rname);
+	return dep_data;
+}
+
+static unsigned int route_map_dep_hash_make_key(const void *p)
+{
+	return (string_hash_make((char *)p));
+}
+
+static void route_map_print_dependency(struct hash_bucket *bucket, void *data)
+{
+	struct route_map_dep_data *dep_data = bucket->data;
+	char *rmap_name = dep_data->rname;
+	char *dep_name = data;
+
+	zlog_debug("%s: Dependency for %s: %s", __func__, dep_name, rmap_name);
+}
+
+static int route_map_dep_update(struct hash *dephash, const char *dep_name,
+				const char *rmap_name, route_map_event_t type)
+{
+	struct route_map_dep *dep = NULL;
+	char *dname, *rname;
+	int ret = 0;
+	struct route_map_dep_data *dep_data = NULL, *ret_dep_data = NULL;
+	struct route_map_dep_data tmp_dep_data;
+
+	dname = XSTRDUP(MTYPE_ROUTE_MAP_NAME, dep_name);
+	rname = XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap_name);
+
+	switch (type) {
+	case RMAP_EVENT_PLIST_ADDED:
+	case RMAP_EVENT_CLIST_ADDED:
+	case RMAP_EVENT_ECLIST_ADDED:
+	case RMAP_EVENT_ASLIST_ADDED:
+	case RMAP_EVENT_LLIST_ADDED:
+	case RMAP_EVENT_CALL_ADDED:
+	case RMAP_EVENT_FILTER_ADDED:
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug("Adding dependency for filter %s in route-map %s",
+				   dep_name, rmap_name);
+		dep = (struct route_map_dep *)hash_get(
+			dephash, dname, route_map_dep_hash_alloc);
+		if (!dep) {
+			ret = -1;
+			goto out;
+		}
+
+		if (!dep->this_hash)
+			dep->this_hash = dephash;
+
+		memset(&tmp_dep_data, 0, sizeof(tmp_dep_data));
+		tmp_dep_data.rname = rname;
+		dep_data = hash_lookup(dep->dep_rmap_hash, &tmp_dep_data);
+		if (!dep_data)
+			dep_data = hash_get(dep->dep_rmap_hash, &tmp_dep_data,
+					    route_map_name_hash_alloc);
+
+		dep_data->refcnt++;
+		break;
+	case RMAP_EVENT_PLIST_DELETED:
+	case RMAP_EVENT_CLIST_DELETED:
+	case RMAP_EVENT_ECLIST_DELETED:
+	case RMAP_EVENT_ASLIST_DELETED:
+	case RMAP_EVENT_LLIST_DELETED:
+	case RMAP_EVENT_CALL_DELETED:
+	case RMAP_EVENT_FILTER_DELETED:
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug("Deleting dependency for filter %s in route-map %s",
+				   dep_name, rmap_name);
+		dep = (struct route_map_dep *)hash_get(dephash, dname, NULL);
+		if (!dep) {
+			goto out;
+		}
+
+		memset(&tmp_dep_data, 0, sizeof(tmp_dep_data));
+		tmp_dep_data.rname = rname;
+		dep_data = hash_lookup(dep->dep_rmap_hash, &tmp_dep_data);
+		/*
+		 * If dep_data is NULL then something has gone seriously
+		 * wrong in route-map handling.  Note it and prevent
+		 * the crash.
+		 */
+		if (!dep_data) {
+			zlog_warn(
+				"route-map dependency for route-map %s: %s is not correct",
+				rmap_name, dep_name);
+			goto out;
+		}
+
+		dep_data->refcnt--;
+
+		if (!dep_data->refcnt) {
+			ret_dep_data = hash_release(dep->dep_rmap_hash,
+						    &tmp_dep_data);
+			if (ret_dep_data) {
+				XFREE(MTYPE_ROUTE_MAP_NAME,
+				      ret_dep_data->rname);
+				XFREE(MTYPE_ROUTE_MAP_DEP_DATA, ret_dep_data);
+			}
+		}
+
+		if (!dep->dep_rmap_hash->count) {
+			dep = hash_release(dephash, dname);
+			hash_free(dep->dep_rmap_hash);
+			XFREE(MTYPE_ROUTE_MAP_NAME, dep->dep_name);
+			XFREE(MTYPE_ROUTE_MAP_DEP, dep);
+		}
+		break;
+	case RMAP_EVENT_SET_ADDED:
+	case RMAP_EVENT_SET_DELETED:
+	case RMAP_EVENT_SET_REPLACED:
+	case RMAP_EVENT_MATCH_ADDED:
+	case RMAP_EVENT_MATCH_DELETED:
+	case RMAP_EVENT_MATCH_REPLACED:
+	case RMAP_EVENT_INDEX_ADDED:
+	case RMAP_EVENT_INDEX_DELETED:
+		break;
+	}
+
+	if (dep) {
+		if (CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP))
+			hash_iterate(dep->dep_rmap_hash,
+				     route_map_print_dependency, dname);
+	}
+
+out:
+	XFREE(MTYPE_ROUTE_MAP_NAME, rname);
+	XFREE(MTYPE_ROUTE_MAP_NAME, dname);
+	return ret;
+}
+
+static struct hash *route_map_get_dep_hash(route_map_event_t event)
+{
+	struct hash *upd8_hash = NULL;
+
+	switch (event) {
+	case RMAP_EVENT_PLIST_ADDED:
+	case RMAP_EVENT_PLIST_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_PLIST];
+		break;
+	case RMAP_EVENT_CLIST_ADDED:
+	case RMAP_EVENT_CLIST_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_CLIST];
+		break;
+	case RMAP_EVENT_ECLIST_ADDED:
+	case RMAP_EVENT_ECLIST_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_ECLIST];
+		break;
+	case RMAP_EVENT_ASLIST_ADDED:
+	case RMAP_EVENT_ASLIST_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_ASPATH];
+		break;
+	case RMAP_EVENT_LLIST_ADDED:
+	case RMAP_EVENT_LLIST_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_LCLIST];
+		break;
+	case RMAP_EVENT_CALL_ADDED:
+	case RMAP_EVENT_CALL_DELETED:
+	case RMAP_EVENT_MATCH_ADDED:
+	case RMAP_EVENT_MATCH_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_RMAP];
+		break;
+	case RMAP_EVENT_FILTER_ADDED:
+	case RMAP_EVENT_FILTER_DELETED:
+		upd8_hash = route_map_dep_hash[ROUTE_MAP_DEP_FILTER];
+		break;
+	/*
+	 * Should we actually be ignoring these?
+	 * I am not sure but at this point in time, let
+	 * us get them into this switch and we can peel
+	 * them into the appropriate place in the future
+	 */
+	case RMAP_EVENT_SET_ADDED:
+	case RMAP_EVENT_SET_DELETED:
+	case RMAP_EVENT_SET_REPLACED:
+	case RMAP_EVENT_MATCH_REPLACED:
+	case RMAP_EVENT_INDEX_ADDED:
+	case RMAP_EVENT_INDEX_DELETED:
+		upd8_hash = NULL;
+		break;
+	}
+	return (upd8_hash);
+}
+
+static void route_map_process_dependency(struct hash_bucket *bucket, void *data)
+{
+	struct route_map_dep_data *dep_data = NULL;
+	char *rmap_name = NULL;
+
+	dep_data = bucket->data;
+	rmap_name = dep_data->rname;
+
+	if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+		zlog_debug("Notifying %s of dependency", rmap_name);
+	if (route_map_master.event_hook)
+		(*route_map_master.event_hook)(rmap_name);
+}
+
+void route_map_upd8_dependency(route_map_event_t type, const char *arg,
+			       const char *rmap_name)
+{
+	struct hash *upd8_hash = NULL;
+
+	if ((upd8_hash = route_map_get_dep_hash(type))) {
+		route_map_dep_update(upd8_hash, arg, rmap_name, type);
+
+		if (type == RMAP_EVENT_CALL_ADDED) {
+			/* Execute hook. */
+			if (route_map_master.add_hook)
+				(*route_map_master.add_hook)(rmap_name);
+		} else if (type == RMAP_EVENT_CALL_DELETED) {
+			/* Execute hook. */
+			if (route_map_master.delete_hook)
+				(*route_map_master.delete_hook)(rmap_name);
+		}
+	}
+}
+
+void route_map_notify_dependencies(const char *affected_name,
+				   route_map_event_t event)
+{
+	struct route_map_dep *dep;
+	struct hash *upd8_hash;
+	char *name;
+
+	if (!affected_name)
+		return;
+
+	name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, affected_name);
+
+	if ((upd8_hash = route_map_get_dep_hash(event)) == NULL) {
+		XFREE(MTYPE_ROUTE_MAP_NAME, name);
+		return;
+	}
+
+	dep = (struct route_map_dep *)hash_get(upd8_hash, name, NULL);
+	if (dep) {
+		if (!dep->this_hash)
+			dep->this_hash = upd8_hash;
+
+		if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)))
+			zlog_debug("Filter %s updated", dep->dep_name);
+		hash_iterate(dep->dep_rmap_hash, route_map_process_dependency,
+			     (void *)event);
+	}
+
+	XFREE(MTYPE_ROUTE_MAP_NAME, name);
+}
+
+/* VTY related functions. */
+static void clear_route_map_helper(struct route_map *map)
+{
+	struct route_map_index *index;
+
+	map->applied_clear = map->applied;
+	for (index = map->head; index; index = index->next)
+		index->applied_clear = index->applied;
+}
+
+DEFPY (rmap_clear_counters,
+       rmap_clear_counters_cmd,
+       "clear route-map counters [RMAP_NAME$rmapname]",
+       CLEAR_STR
+       "route-map information\n"
+       "counters associated with the specified route-map\n"
+       "route-map name\n")
+{
+	struct route_map *map;
+
+	if (rmapname) {
+		map = route_map_lookup_by_name(rmapname);
+
+		if (map)
+			clear_route_map_helper(map);
+		else {
+			vty_out(vty, "%s: 'route-map %s' not found\n",
+				frr_protonameinst, rmapname);
+			return CMD_SUCCESS;
+		}
+	} else {
+		for (map = route_map_master.head; map; map = map->next)
+			clear_route_map_helper(map);
+	}
+
+	return CMD_SUCCESS;
+
+}
+
+DEFUN (rmap_show_name,
+       rmap_show_name_cmd,
+       "show route-map [WORD] [json]",
+       SHOW_STR
+       "route-map information\n"
+       "route-map name\n"
+       JSON_STR)
+{
+	bool uj = use_json(argc, argv);
+	int idx = 0;
+	const char *name = NULL;
+
+	if (argv_find(argv, argc, "WORD", &idx))
+		name = argv[idx]->arg;
+
+	return vty_show_route_map(vty, name, uj);
+}
+
+DEFUN (rmap_show_unused,
+       rmap_show_unused_cmd,
+       "show route-map-unused",
+       SHOW_STR
+       "unused route-map information\n")
+{
+	return vty_show_unused_route_map(vty);
+}
+
+DEFPY (debug_rmap,
+       debug_rmap_cmd,
+       "debug route-map [detail]$detail",
+       DEBUG_STR
+       "Debug option set for route-maps\n"
+       "Detailed output\n")
+{
+	if (!detail)
+		SET_FLAG(rmap_debug, DEBUG_ROUTEMAP);
+	else
+		SET_FLAG(rmap_debug, DEBUG_ROUTEMAP | DEBUG_ROUTEMAP_DETAIL);
+
+	return CMD_SUCCESS;
+}
+
+DEFPY (no_debug_rmap,
+       no_debug_rmap_cmd,
+       "no debug route-map [detail]$detail",
+       NO_STR
+       DEBUG_STR
+       "Debug option set for route-maps\n"
+       "Detailed output\n")
+{
+	if (!detail)
+		UNSET_FLAG(rmap_debug, DEBUG_ROUTEMAP);
+	else
+		UNSET_FLAG(rmap_debug, DEBUG_ROUTEMAP | DEBUG_ROUTEMAP_DETAIL);
+
+	return CMD_SUCCESS;
+}
+
+/* Debug node. */
+static int rmap_config_write_debug(struct vty *vty);
+static struct cmd_node rmap_debug_node = {
+	.name = "route-map debug",
+	.node = RMAP_DEBUG_NODE,
+	.prompt = "",
+	.config_write = rmap_config_write_debug,
+};
+
+void route_map_show_debug(struct vty *vty)
+{
+	if (CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP))
+		vty_out(vty, "debug route-map\n");
+}
+
+/* Configuration write function. */
+static int rmap_config_write_debug(struct vty *vty)
+{
+	int write = 0;
+
+	if (CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP)) {
+		vty_out(vty, "debug route-map\n");
+		write++;
+	}
+
+	return write;
+}
+
+/* Common route map rules */
+
+void *route_map_rule_tag_compile(const char *arg)
+{
+	unsigned long int tmp;
+	char *endptr;
+	route_tag_t *tag;
+
+	errno = 0;
+	tmp = strtoul(arg, &endptr, 0);
+	if (arg[0] == '\0' || *endptr != '\0' || errno || tmp > ROUTE_TAG_MAX)
+		return NULL;
+
+	tag = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(*tag));
+	*tag = tmp;
+
+	return tag;
+}
+
+void route_map_rule_tag_free(void *rule)
+{
+	XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+void route_map_finish(void)
+{
+	int i;
+	struct route_map_rule_cmd_proxy *proxy;
+
+	/* these 2 hash tables have INIT_HASH initializers, so the "default"
+	 * state is "initialized & empty" => fini() followed by init() to
+	 * return to that same state
+	 */
+	while ((proxy = rmap_cmd_name_pop(rmap_match_cmds)))
+		(void)proxy;
+	rmap_cmd_name_fini(rmap_match_cmds);
+	rmap_cmd_name_init(rmap_match_cmds);
+
+	while ((proxy = rmap_cmd_name_pop(rmap_set_cmds)))
+		(void)proxy;
+	rmap_cmd_name_fini(rmap_set_cmds);
+	rmap_cmd_name_init(rmap_set_cmds);
+
+	/*
+	 * All protocols are setting these to NULL
+	 * by default on shutdown( route_map_finish )
+	 * Why are we making them do this work?
+	 */
+	route_map_master.add_hook = NULL;
+	route_map_master.delete_hook = NULL;
+	route_map_master.event_hook = NULL;
+
+	/* cleanup route_map */
+	while (route_map_master.head) {
+		struct route_map *map = route_map_master.head;
+		map->to_be_processed = false;
+		route_map_delete(map);
+	}
+
+	for (i = 1; i < ROUTE_MAP_DEP_MAX; i++) {
+		hash_free(route_map_dep_hash[i]);
+		route_map_dep_hash[i] = NULL;
+	}
+
+	hash_free(route_map_master_hash);
+	route_map_master_hash = NULL;
+}
+
+/* Increment the use_count counter while attaching the route map */
+void route_map_counter_increment(struct route_map *map)
+{
+	if (map)
+		map->use_count++;
+}
+
+/* Decrement the use_count counter while detaching the route map. */
+void route_map_counter_decrement(struct route_map *map)
+{
+	if (map) {
+		if (map->use_count <= 0)
+			return;
+		map->use_count--;
+	}
+}
+
+DEFUN_HIDDEN(show_route_map_pfx_tbl, show_route_map_pfx_tbl_cmd,
+	     "show route-map RMAP_NAME prefix-table",
+	     SHOW_STR
+	     "route-map\n"
+	     "route-map name\n"
+	     "internal prefix-table\n")
+{
+	const char *rmap_name = argv[2]->arg;
+	struct route_map *rmap = NULL;
+	struct route_table *rm_pfx_tbl4 = NULL;
+	struct route_table *rm_pfx_tbl6 = NULL;
+	struct route_node *rn = NULL, *prn = NULL;
+	struct list *rmap_index_list = NULL;
+	struct listnode *ln = NULL, *nln = NULL;
+	struct route_map_index *index = NULL;
+	uint8_t len = 54;
+
+	vty_out(vty, "%s:\n", frr_protonameinst);
+	rmap = route_map_lookup_by_name(rmap_name);
+	if (rmap) {
+		rm_pfx_tbl4 = rmap->ipv4_prefix_table;
+		if (rm_pfx_tbl4) {
+			vty_out(vty, "\n%s%43s%s\n", "IPv4 Prefix", "",
+				"Route-map Index List");
+			vty_out(vty, "%s%39s%s\n", "_______________", "",
+				"____________________");
+			for (rn = route_top(rm_pfx_tbl4); rn;
+			     rn = route_next(rn)) {
+				vty_out(vty, "    %pRN (%d)\n", rn,
+					route_node_get_lock_count(rn));
+
+				vty_out(vty, "(P) ");
+				prn = rn->parent;
+				if (prn) {
+					vty_out(vty, "%pRN\n", prn);
+				}
+
+				vty_out(vty, "\n");
+				rmap_index_list = (struct list *)rn->info;
+				if (!rmap_index_list
+				    || !listcount(rmap_index_list))
+					vty_out(vty, "%*s%s\n", len, "", "-");
+				else
+					for (ALL_LIST_ELEMENTS(rmap_index_list,
+							       ln, nln,
+							       index)) {
+						vty_out(vty, "%*s%s seq %d\n",
+							len, "",
+							index->map->name,
+							index->pref);
+					}
+				vty_out(vty, "\n");
+			}
+		}
+
+		rm_pfx_tbl6 = rmap->ipv6_prefix_table;
+		if (rm_pfx_tbl6) {
+			vty_out(vty, "\n%s%43s%s\n", "IPv6 Prefix", "",
+				"Route-map Index List");
+			vty_out(vty, "%s%39s%s\n", "_______________", "",
+				"____________________");
+			for (rn = route_top(rm_pfx_tbl6); rn;
+			     rn = route_next(rn)) {
+				vty_out(vty, "    %pRN (%d)\n", rn,
+					route_node_get_lock_count(rn));
+
+				vty_out(vty, "(P) ");
+				prn = rn->parent;
+				if (prn) {
+					vty_out(vty, "%pRN\n", prn);
+				}
+
+				vty_out(vty, "\n");
+				rmap_index_list = (struct list *)rn->info;
+				if (!rmap_index_list
+				    || !listcount(rmap_index_list))
+					vty_out(vty, "%*s%s\n", len, "", "-");
+				else
+					for (ALL_LIST_ELEMENTS(rmap_index_list,
+							       ln, nln,
+							       index)) {
+						vty_out(vty, "%*s%s seq %d\n",
+							len, "",
+							index->map->name,
+							index->pref);
+					}
+				vty_out(vty, "\n");
+			}
+		}
+	}
+
+	vty_out(vty, "\n");
+	return CMD_SUCCESS;
+}
+
+/* Initialization of route map vector. */
+void route_map_init(void)
+{
+	int i;
+
+	route_map_master_hash =
+		hash_create_size(8, route_map_hash_key_make, route_map_hash_cmp,
+				 "Route Map Master Hash");
+
+	for (i = 1; i < ROUTE_MAP_DEP_MAX; i++)
+		route_map_dep_hash[i] = hash_create_size(
+			8, route_map_dep_hash_make_key, route_map_dep_hash_cmp,
+			"Route Map Dep Hash");
+
+	UNSET_FLAG(rmap_debug, DEBUG_ROUTEMAP);
+
+	route_map_cli_init();
+
+	/* Install route map top node. */
+	install_node(&rmap_debug_node);
+
+	/* Install route map commands. */
+	install_element(CONFIG_NODE, &debug_rmap_cmd);
+	install_element(CONFIG_NODE, &no_debug_rmap_cmd);
+
+	/* Install show command */
+	install_element(ENABLE_NODE, &rmap_clear_counters_cmd);
+
+	install_element(ENABLE_NODE, &rmap_show_name_cmd);
+	install_element(ENABLE_NODE, &rmap_show_unused_cmd);
+
+	install_element(ENABLE_NODE, &debug_rmap_cmd);
+	install_element(ENABLE_NODE, &no_debug_rmap_cmd);
+
+	install_element(ENABLE_NODE, &show_route_map_pfx_tbl_cmd);
+}