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sharpd: support backup nexthops

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Add cli and zapi support for backup nexthops for sharpd routes.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
This commit is contained in:
Mark Stapp 2019-11-15 16:33:34 -05:00
parent 0a8881b4b5
commit 1df3b1dc65
5 changed files with 92 additions and 11 deletions
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1
lib/zclient.c
View File

@ -1500,6 +1500,7 @@ int zapi_nexthop_from_nexthop(struct zapi_nexthop *znh,
znh->type = nh->type;
znh->vrf_id = nh->vrf_id;
znh->weight = nh->weight;
znh->ifindex = nh->ifindex;
znh->gate = nh->gate;

4
sharpd/sharp_globals.h
View File

@ -28,9 +28,11 @@ struct sharp_routes {
/* The original prefix for route installation */
struct prefix orig_prefix;
/* The nexthop group we are using for installation */
/* The nexthop info we are using for installation */
struct nexthop nhop;
struct nexthop backup_nhop;
struct nexthop_group nhop_group;
struct nexthop_group backup_nhop_group;
uint32_t total_routes;
uint32_t installed_routes;

57
sharpd/sharp_vty.c
View File

@ -162,7 +162,12 @@ DEFPY (install_routes_data_dump,
DEFPY (install_routes,
install_routes_cmd,
"sharp install routes [vrf NAME$vrf_name] <A.B.C.D$start4|X:X::X:X$start6> <nexthop <A.B.C.D$nexthop4|X:X::X:X$nexthop6>|nexthop-group NHGNAME$nexthop_group> (1-1000000)$routes [instance (0-255)$instance] [repeat (2-1000)$rpt]",
"sharp install routes [vrf NAME$vrf_name]\
<A.B.C.D$start4|X:X::X:X$start6>\
<nexthop <A.B.C.D$nexthop4|X:X::X:X$nexthop6>|\
nexthop-group NHGNAME$nexthop_group>\
[backup$backup <A.B.C.D$backup_nexthop4|X:X::X:X$backup_nexthop6>] \
(1-1000000)$routes [instance (0-255)$instance] [repeat (2-1000)$rpt]",
"Sharp routing Protocol\n"
"install some routes\n"
"Routes to install\n"
@ -175,6 +180,9 @@ DEFPY (install_routes,
"V6 Nexthop address to use\n"
"Nexthop-Group to use\n"
"The Name of the nexthop-group\n"
"Backup nexthop to use(Can be an IPv4 or IPv6 address)\n"
"Backup V4 Nexthop address to use\n"
"Backup V6 Nexthop address to use\n"
"How many to create\n"
"Instance to use\n"
"Instance\n"
@ -197,6 +205,8 @@ DEFPY (install_routes,
memset(&sg.r.orig_prefix, 0, sizeof(sg.r.orig_prefix));
memset(&sg.r.nhop, 0, sizeof(sg.r.nhop));
memset(&sg.r.nhop_group, 0, sizeof(sg.r.nhop_group));
memset(&sg.r.backup_nhop, 0, sizeof(sg.r.nhop));
memset(&sg.r.backup_nhop_group, 0, sizeof(sg.r.nhop_group));
if (start4.s_addr != 0) {
prefix.family = AF_INET;
@ -219,6 +229,12 @@ DEFPY (install_routes,
return CMD_WARNING;
}
/* Explicit backup not available with named nexthop-group */
if (backup && nexthop_group) {
vty_out(vty, "%% Invalid: cannot specify both nexthop-group and backup\n");
return CMD_WARNING;
}
if (nexthop_group) {
struct nexthop_group_cmd *nhgc = nhgc_find(nexthop_group);
if (!nhgc) {
@ -229,6 +245,22 @@ DEFPY (install_routes,
}
sg.r.nhop_group.nexthop = nhgc->nhg.nexthop;
/* Use group's backup nexthop info if present */
if (nhgc->backup_list_name[0]) {
struct nexthop_group_cmd *bnhgc =
nhgc_find(nhgc->backup_list_name);
if (!bnhgc) {
vty_out(vty, "%% Backup group %s not found for group %s\n",
nhgc->backup_list_name,
nhgc->name);
return CMD_WARNING;
}
sg.r.backup_nhop.vrf_id = vrf->vrf_id;
sg.r.backup_nhop_group.nexthop = bnhgc->nhg.nexthop;
}
} else {
if (nexthop4.s_addr != INADDR_ANY) {
sg.r.nhop.gate.ipv4 = nexthop4;
@ -242,11 +274,30 @@ DEFPY (install_routes,
sg.r.nhop_group.nexthop = &sg.r.nhop;
}
/* Use single backup nexthop if specified */
if (backup) {
/* Set flag and index in primary nexthop */
SET_FLAG(sg.r.nhop.flags, NEXTHOP_FLAG_HAS_BACKUP);
sg.r.nhop.backup_idx = 0;
if (backup_nexthop4.s_addr != INADDR_ANY) {
sg.r.backup_nhop.gate.ipv4 = backup_nexthop4;
sg.r.backup_nhop.type = NEXTHOP_TYPE_IPV4;
} else {
sg.r.backup_nhop.gate.ipv6 = backup_nexthop6;
sg.r.backup_nhop.type = NEXTHOP_TYPE_IPV6;
}
sg.r.backup_nhop.vrf_id = vrf->vrf_id;
sg.r.backup_nhop_group.nexthop = &sg.r.backup_nhop;
}
sg.r.inst = instance;
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, rts);
sharp_install_routes_helper(&prefix, sg.r.vrf_id, sg.r.inst,
&sg.r.nhop_group, &sg.r.backup_nhop_group,
rts);
return CMD_SUCCESS;
}

33
sharpd/sharp_zebra.c
View File

@ -143,7 +143,9 @@ int sharp_install_lsps_helper(bool install_p, const struct prefix *p,
}
void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
uint8_t instance, struct nexthop_group *nhg,
uint8_t instance,
const struct nexthop_group *nhg,
const struct nexthop_group *backup_nhg,
uint32_t routes)
{
uint32_t temp, i;
@ -157,9 +159,13 @@ void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
} else
temp = ntohl(p->u.val32[3]);
/* Only use backup route/nexthops if present */
if (backup_nhg && (backup_nhg->nexthop == NULL))
backup_nhg = NULL;
monotime(&sg.r.t_start);
for (i = 0; i < routes; i++) {
route_add(p, vrf_id, (uint8_t)instance, nhg);
route_add(p, vrf_id, (uint8_t)instance, nhg, backup_nhg);
if (v4)
p->u.prefix4.s_addr = htonl(++temp);
else
@ -209,6 +215,7 @@ static void handle_repeated(bool installed)
sg.r.installed_routes = 0;
sharp_install_routes_helper(&p, sg.r.vrf_id, sg.r.inst,
&sg.r.nhop_group,
&sg.r.backup_nhop_group,
sg.r.total_routes);
}
}
@ -276,8 +283,9 @@ 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 route_add(struct prefix *p, vrf_id_t vrf_id,
uint8_t instance, struct nexthop_group *nhg)
void route_add(const struct prefix *p, vrf_id_t vrf_id,
uint8_t instance, const struct nexthop_group *nhg,
const struct nexthop_group *backup_nhg)
{
struct zapi_route api;
struct zapi_nexthop *api_nh;
@ -298,10 +306,27 @@ void route_add(struct prefix *p, vrf_id_t vrf_id,
api_nh = &api.nexthops[i];
zapi_nexthop_from_nexthop(api_nh, nh);
i++;
}
api.nexthop_num = i;
/* Include backup nexthops, if present */
if (backup_nhg && backup_nhg->nexthop) {
SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS);
i = 0;
for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) {
api_nh = &api.backup_nexthops[i];
zapi_backup_nexthop_from_nexthop(api_nh, nh);
i++;
}
api.backup_nexthop_num = i;
}
zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
}

8
sharpd/sharp_zebra.h
View File

@ -25,15 +25,17 @@
extern void sharp_zebra_init(void);
extern void vrf_label_add(vrf_id_t vrf_id, afi_t afi, mpls_label_t label);
extern void route_add(struct prefix *p, vrf_id_t, uint8_t instance,
struct nexthop_group *nhg);
extern void route_add(const struct prefix *p, vrf_id_t, uint8_t instance,
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,
struct nexthop_group *nhg,
const struct nexthop_group *nhg,
const struct nexthop_group *backup_nhg,
uint32_t routes);
extern void sharp_remove_routes_helper(struct prefix *p, vrf_id_t vrf_id,
uint8_t instance, uint32_t routes);