sharpd: add abilty to send a nhg to zebra

Modify the sharpd program to have the ability to pass down
a NHG and then operate on it for route installation.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

sharpd/sharp_globals.h

@@ -31,6 +31,7 @@ struct sharp_routes {
 	/* The nexthop info we are using for installation */
 	struct nexthop nhop;
 	struct nexthop backup_nhop;
+	uint32_t nhgid;
 	struct nexthop_group nhop_group;
 	struct nexthop_group backup_nhop_group;
 

sharpd/sharp_main.c

@@ -47,6 +47,7 @@
 #include "sharp_zebra.h"
 #include "sharp_vty.h"
 #include "sharp_globals.h"
+#include "sharp_nht.h"
 
 DEFINE_MGROUP(SHARPD, "sharpd")
 
@@ -164,7 +165,7 @@ int main(int argc, char **argv, char **envp)
 
 	sharp_global_init();
 
-	nexthop_group_init(NULL, NULL, NULL, NULL);
+	sharp_nhgroup_init();
 	vrf_init(NULL, NULL, NULL, NULL, NULL);
 
 	sharp_zebra_init();

sharpd/sharp_nht.c

@@ -25,11 +25,15 @@
 #include "nexthop.h"
 #include "nexthop_group.h"
 #include "vty.h"
+#include "typesafe.h"
+#include "zclient.h"
 
 #include "sharp_nht.h"
 #include "sharp_globals.h"
+#include "sharp_zebra.h"
 
 DEFINE_MTYPE_STATIC(SHARPD, NH_TRACKER, "Nexthop Tracker")
+DEFINE_MTYPE_STATIC(SHARPD, NHG, "Nexthop Group")
 
 struct sharp_nh_tracker *sharp_nh_tracker_get(struct prefix *p)
 {
@@ -65,3 +69,109 @@ void sharp_nh_tracker_dump(struct vty *vty)
 			nht->updates);
 	}
 }
+
+PREDECL_RBTREE_UNIQ(sharp_nhg_rb);
+
+struct sharp_nhg {
+	struct sharp_nhg_rb_item mylistitem;
+
+	uint32_t id;
+
+	char name[256];
+};
+
+static uint32_t nhg_id;
+
+static uint32_t sharp_get_next_nhid(void)
+{
+	zlog_debug("Id assigned: %u", nhg_id + 1);
+	return nhg_id++;
+}
+
+struct sharp_nhg_rb_head nhg_head;
+
+static int sharp_nhg_compare_func(const struct sharp_nhg *a,
+				  const struct sharp_nhg *b)
+{
+	return strncmp(a->name, b->name, strlen(a->name));
+}
+
+DECLARE_RBTREE_UNIQ(sharp_nhg_rb, struct sharp_nhg, mylistitem,
+		    sharp_nhg_compare_func);
+
+static void sharp_nhgroup_add_cb(const char *name)
+{
+	struct sharp_nhg *snhg;
+
+	snhg = XCALLOC(MTYPE_NHG, sizeof(*snhg));
+	snhg->id = sharp_get_next_nhid();
+	strncpy(snhg->name, name, sizeof(snhg->name));
+
+	sharp_nhg_rb_add(&nhg_head, snhg);
+	return;
+}
+
+static void sharp_nhgroup_add_nexthop_cb(const struct nexthop_group_cmd *nhgc,
+					 const struct nexthop *nhop)
+{
+	struct sharp_nhg lookup;
+	struct sharp_nhg *snhg;
+
+	strncpy(lookup.name, nhgc->name, sizeof(lookup.name));
+	snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
+
+	nhg_add(snhg->id, &nhgc->nhg);
+	return;
+}
+
+static void sharp_nhgroup_del_nexthop_cb(const struct nexthop_group_cmd *nhgc,
+					 const struct nexthop *nhop)
+{
+	struct sharp_nhg lookup;
+	struct sharp_nhg *snhg;
+
+	strncpy(lookup.name, nhgc->name, sizeof(lookup.name));
+	snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
+
+	nhg_add(snhg->id, &nhgc->nhg);
+	return;
+}
+
+static void sharp_nhgroup_delete_cb(const char *name)
+{
+	struct sharp_nhg lookup;
+	struct sharp_nhg *snhg;
+
+	strncpy(lookup.name, name, sizeof(lookup.name));
+	snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
+	if (!snhg)
+		return;
+
+	nhg_del(snhg->id);
+	sharp_nhg_rb_del(&nhg_head, snhg);
+	XFREE(MTYPE_NHG, snhg);
+	return;
+}
+
+uint32_t sharp_nhgroup_get_id(const char *name)
+{
+	struct sharp_nhg lookup;
+	struct sharp_nhg *snhg;
+
+	strncpy(lookup.name, name, sizeof(lookup.name));
+	snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
+	if (!snhg)
+		return 0;
+
+	return snhg->id;
+}
+
+void sharp_nhgroup_init(void)
+{
+	sharp_nhg_rb_init(&nhg_head);
+	nhg_id = zclient_get_nhg_start(ZEBRA_ROUTE_SHARP);
+
+	nexthop_group_init(sharp_nhgroup_add_cb, sharp_nhgroup_add_nexthop_cb,
+			   sharp_nhgroup_del_nexthop_cb,
+			   sharp_nhgroup_delete_cb);
+}

sharpd/sharp_nht.h

@@ -35,4 +35,7 @@ struct sharp_nh_tracker {
 extern struct sharp_nh_tracker *sharp_nh_tracker_get(struct prefix *p);
 
 extern void sharp_nh_tracker_dump(struct vty *vty);
+
+extern uint32_t sharp_nhgroup_get_id(const char *name);
+extern void sharp_nhgroup_init(void);
 #endif

sharpd/sharp_vty.c

@@ -192,6 +192,7 @@ DEFPY (install_routes,
 	struct vrf *vrf;
 	struct prefix prefix;
 	uint32_t rts;
+	uint32_t nhgid = 0;
 
 	sg.r.total_routes = routes;
 	sg.r.installed_routes = 0;
@@ -244,6 +245,8 @@ DEFPY (install_routes,
 			return CMD_WARNING;
 		}
 
+		nhgid = sharp_nhgroup_get_id(nexthop_group);
+		sg.r.nhgid = nhgid;
 		sg.r.nhop_group.nexthop = nhgc->nhg.nexthop;
 
 		/* Use group's backup nexthop info if present */
@@ -297,8 +300,8 @@ DEFPY (install_routes,
 	sg.r.vrf_id = vrf->vrf_id;
 	rts = routes;
 	sharp_install_routes_helper(&prefix, sg.r.vrf_id, sg.r.inst,
-				    &sg.r.nhop_group, &sg.r.backup_nhop_group,
-				    rts);
+				    nhgid, &sg.r.nhop_group,
+				    &sg.r.backup_nhop_group, rts);
 
 	return CMD_SUCCESS;
 }

sharpd/sharp_zebra.c

@@ -217,7 +217,7 @@ int sharp_install_lsps_helper(bool install_p, bool update_p,
 }
 
 void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
-				 uint8_t instance,
+				 uint8_t instance, uint32_t nhgid,
 				 const struct nexthop_group *nhg,
 				 const struct nexthop_group *backup_nhg,
 				 uint32_t routes)
@@ -239,7 +239,7 @@ void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
 
 	monotime(&sg.r.t_start);
 	for (i = 0; i < routes; i++) {
-		route_add(p, vrf_id, (uint8_t)instance, nhg, backup_nhg);
+		route_add(p, vrf_id, (uint8_t)instance, nhgid, nhg, backup_nhg);
 		if (v4)
 			p->u.prefix4.s_addr = htonl(++temp);
 		else
@@ -288,6 +288,7 @@ static void handle_repeated(bool installed)
 	if (!installed) {
 		sg.r.installed_routes = 0;
 		sharp_install_routes_helper(&p, sg.r.vrf_id, sg.r.inst,
+					    sg.r.nhgid,
 					    &sg.r.nhop_group,
 					    &sg.r.backup_nhop_group,
 					    sg.r.total_routes);
@@ -357,8 +358,34 @@ void vrf_label_add(vrf_id_t vrf_id, afi_t afi, mpls_label_t label)
 	zclient_send_vrf_label(zclient, vrf_id, afi, label, ZEBRA_LSP_SHARP);
 }
 
+void nhg_add(uint32_t id, const struct nexthop_group *nhg)
+{
+	struct zapi_nexthop nh_array[MULTIPATH_NUM];
+	struct zapi_nexthop *api_nh;
+	uint16_t nexthop_num = 0;
+	struct nexthop *nh;
+
+	for (ALL_NEXTHOPS_PTR(nhg, nh)) {
+		api_nh = &nh_array[nexthop_num];
+
+		zapi_nexthop_from_nexthop(api_nh, nh);
+		nexthop_num++;
+	}
+
+	zclient_nhg_add(zclient, id, nexthop_num, nh_array);
+
+	zclient_send_message(zclient);
+}
+
+void nhg_del(uint32_t id)
+{
+	zclient_nhg_del(zclient, id);
+	zclient_send_message(zclient);
+}
+
 void route_add(const struct prefix *p, vrf_id_t vrf_id,
-	       uint8_t instance, const struct nexthop_group *nhg,
+	       uint8_t instance, uint32_t nhgid,
+	       const struct nexthop_group *nhg,
 	       const struct nexthop_group *backup_nhg)
 {
 	struct zapi_route api;
@@ -376,14 +403,19 @@ void route_add(const struct prefix *p, vrf_id_t vrf_id,
 	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
 	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 
-	for (ALL_NEXTHOPS_PTR(nhg, nh)) {
-		api_nh = &api.nexthops[i];
+	if (nhgid) {
+		SET_FLAG(api.message, ZAPI_MESSAGE_NHG);
+		api.nhgid = nhgid;
+	} else {
+		for (ALL_NEXTHOPS_PTR(nhg, nh)) {
+			api_nh = &api.nexthops[i];
 
-		zapi_nexthop_from_nexthop(api_nh, nh);
+			zapi_nexthop_from_nexthop(api_nh, nh);
 
-		i++;
+			i++;
+		}
+		api.nexthop_num = i;
 	}
-	api.nexthop_num = i;
 
 	/* Include backup nexthops, if present */
 	if (backup_nhg && backup_nhg->nexthop) {

sharpd/sharp_zebra.h

@@ -29,15 +29,17 @@ int sharp_zclient_create(uint32_t session_id);
 int sharp_zclient_delete(uint32_t session_id);
 
 extern void vrf_label_add(vrf_id_t vrf_id, afi_t afi, mpls_label_t label);
+extern void nhg_add(uint32_t id, const struct nexthop_group *nhg);
+extern void nhg_del(uint32_t id);
 extern void route_add(const struct prefix *p, vrf_id_t, uint8_t instance,
-		      const struct nexthop_group *nhg,
+		      uint32_t nhgid, const struct nexthop_group *nhg,
 		      const struct nexthop_group *backup_nhg);
 extern void route_delete(struct prefix *p, vrf_id_t vrf_id, uint8_t instance);
 extern void sharp_zebra_nexthop_watch(struct prefix *p, vrf_id_t vrf_id,
 				      bool import, bool watch, bool connected);
 
 extern void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
-					uint8_t instance,
+					uint8_t instance, uint32_t nhgid,
 					const struct nexthop_group *nhg,
 					const struct nexthop_group *backup_nhg,
 					uint32_t routes);