proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-11-03 23:47:16 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
c8453cd77e
mirror_frr/bgpd/bgp_evpn_mh.c
Donatas Abraitis c48349e346 *: Remove redundand braces for single statement blocks 
Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
2021-11-27 11:20:59 +02:00

4728 lines
130 KiB
C
Raw Blame History

/* EVPN Multihoming procedures
*
* Copyright (C) 2019 Cumulus Networks, Inc.
* Anuradha Karuppiah
*
* This file is part of FRR.
*
* FRRouting is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* FRRouting is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#include <zebra.h>
#include "command.h"
#include "filter.h"
#include "prefix.h"
#include "log.h"
#include "memory.h"
#include "stream.h"
#include "hash.h"
#include "jhash.h"
#include "zclient.h"
#include "lib/printfrr.h"
#include "bgpd/bgp_attr_evpn.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_evpn.h"
#include "bgpd/bgp_evpn_private.h"
#include "bgpd/bgp_evpn_mh.h"
#include "bgpd/bgp_ecommunity.h"
#include "bgpd/bgp_encap_types.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_errors.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_addpath.h"
#include "bgpd/bgp_label.h"
#include "bgpd/bgp_nht.h"
#include "bgpd/bgp_mpath.h"
#include "bgpd/bgp_trace.h"
static void bgp_evpn_local_es_down(struct bgp *bgp,
struct bgp_evpn_es *es);
static void bgp_evpn_local_type1_evi_route_del(struct bgp *bgp,
struct bgp_evpn_es *es);
static struct bgp_evpn_es_vtep *bgp_evpn_es_vtep_add(struct bgp *bgp,
struct bgp_evpn_es *es,
struct in_addr vtep_ip,
bool esr, uint8_t df_alg,
uint16_t df_pref);
static void bgp_evpn_es_vtep_del(struct bgp *bgp,
struct bgp_evpn_es *es, struct in_addr vtep_ip, bool esr);
static void bgp_evpn_es_cons_checks_pend_add(struct bgp_evpn_es *es);
static void bgp_evpn_es_cons_checks_pend_del(struct bgp_evpn_es *es);
static struct bgp_evpn_es_evi *
bgp_evpn_local_es_evi_do_del(struct bgp_evpn_es_evi *es_evi);
static uint32_t bgp_evpn_es_get_active_vtep_cnt(struct bgp_evpn_es *es);
static void bgp_evpn_l3nhg_update_on_vtep_chg(struct bgp_evpn_es *es);
static struct bgp_evpn_es *bgp_evpn_es_new(struct bgp *bgp, const esi_t *esi);
static void bgp_evpn_es_free(struct bgp_evpn_es *es, const char *caller);
static void bgp_evpn_path_es_unlink(struct bgp_path_es_info *es_info);
static void bgp_evpn_mac_update_on_es_local_chg(struct bgp_evpn_es *es,
bool is_local);
esi_t zero_esi_buf, *zero_esi = &zero_esi_buf;
static int bgp_evpn_run_consistency_checks(struct thread *t);
static void bgp_evpn_path_nh_info_free(struct bgp_path_evpn_nh_info *nh_info);
static void bgp_evpn_path_nh_unlink(struct bgp_path_evpn_nh_info *nh_info);
/******************************************************************************
* per-ES (Ethernet Segment) routing table
*
* Following routes are added to the ES's routing table -
* 1. Local and remote ESR (Type-4)
* 2. Local EAD-per-ES (Type-1).
*
* Key for these routes is {ESI, VTEP-IP} so the path selection is practically
* a no-op i.e. all paths lead to same VTEP-IP (i.e. result in the same VTEP
* being added to same ES).
*
* Note the following routes go into the VNI routing table (instead of the
* ES routing table) -
* 1. Remote EAD-per-ES
* 2. Local and remote EAD-per-EVI
*/
/* Calculate the best path for a multi-homing (Type-1 or Type-4) route
* installed in the ES's routing table.
*/
static int bgp_evpn_es_route_select_install(struct bgp *bgp,
struct bgp_evpn_es *es,
struct bgp_dest *dest)
{
int ret = 0;
afi_t afi = AFI_L2VPN;
safi_t safi = SAFI_EVPN;
struct bgp_path_info *old_select; /* old best */
struct bgp_path_info *new_select; /* new best */
struct bgp_path_info_pair old_and_new;
/* Compute the best path. */
bgp_best_selection(bgp, dest, &bgp->maxpaths[afi][safi], &old_and_new,
afi, safi);
old_select = old_and_new.old;
new_select = old_and_new.new;
/*
* If the best path hasn't changed - see if something needs to be
* updated
*/
if (old_select && old_select == new_select
&& old_select->type == ZEBRA_ROUTE_BGP
&& old_select->sub_type == BGP_ROUTE_IMPORTED
&& !CHECK_FLAG(dest->flags, BGP_NODE_USER_CLEAR)
&& !CHECK_FLAG(old_select->flags, BGP_PATH_ATTR_CHANGED)
&& !bgp_addpath_is_addpath_used(&bgp->tx_addpath, afi, safi)) {
if (bgp_zebra_has_route_changed(old_select)) {
bgp_evpn_es_vtep_add(bgp, es, old_select->attr->nexthop,
true /*esr*/,
old_select->attr->df_alg,
old_select->attr->df_pref);
}
UNSET_FLAG(old_select->flags, BGP_PATH_MULTIPATH_CHG);
bgp_zebra_clear_route_change_flags(dest);
return ret;
}
/* If the user did a "clear" this flag will be set */
UNSET_FLAG(dest->flags, BGP_NODE_USER_CLEAR);
/* bestpath has changed; update relevant fields and install or uninstall
* into the zebra RIB.
*/
if (old_select || new_select)
bgp_bump_version(dest);
if (old_select)
bgp_path_info_unset_flag(dest, old_select, BGP_PATH_SELECTED);
if (new_select) {
bgp_path_info_set_flag(dest, new_select, BGP_PATH_SELECTED);
bgp_path_info_unset_flag(dest, new_select,
BGP_PATH_ATTR_CHANGED);
UNSET_FLAG(new_select->flags, BGP_PATH_MULTIPATH_CHG);
}
if (new_select && new_select->type == ZEBRA_ROUTE_BGP
&& new_select->sub_type == BGP_ROUTE_IMPORTED) {
bgp_evpn_es_vtep_add(bgp, es, new_select->attr->nexthop,
true /*esr */, new_select->attr->df_alg,
new_select->attr->df_pref);
} else {
if (old_select && old_select->type == ZEBRA_ROUTE_BGP
&& old_select->sub_type == BGP_ROUTE_IMPORTED)
bgp_evpn_es_vtep_del(
bgp, es, old_select->attr->nexthop,
true /*esr*/);
}
/* Clear any route change flags. */
bgp_zebra_clear_route_change_flags(dest);
/* Reap old select bgp_path_info, if it has been removed */
if (old_select && CHECK_FLAG(old_select->flags, BGP_PATH_REMOVED))
bgp_path_info_reap(dest, old_select);
return ret;
}
/* Install Type-1/Type-4 route entry in the per-ES routing table */
static int bgp_evpn_es_route_install(struct bgp *bgp,
struct bgp_evpn_es *es, struct prefix_evpn *p,
struct bgp_path_info *parent_pi)
{
int ret = 0;
struct bgp_dest *dest = NULL;
struct bgp_path_info *pi = NULL;
struct attr *attr_new = NULL;
/* Create (or fetch) route within the VNI.
* NOTE: There is no RD here.
*/
dest = bgp_node_get(es->route_table, (struct prefix *)p);
/* Check if route entry is already present. */
for (pi = bgp_dest_get_bgp_path_info(dest); pi; pi = pi->next)
if (pi->extra
&& (struct bgp_path_info *)pi->extra->parent ==
parent_pi)
break;
if (!pi) {
/* Add (or update) attribute to hash. */
attr_new = bgp_attr_intern(parent_pi->attr);
/* Create new route with its attribute. */
pi = info_make(parent_pi->type, BGP_ROUTE_IMPORTED, 0,
parent_pi->peer, attr_new, dest);
SET_FLAG(pi->flags, BGP_PATH_VALID);
bgp_path_info_extra_get(pi);
pi->extra->parent = bgp_path_info_lock(parent_pi);
bgp_dest_lock_node((struct bgp_dest *)parent_pi->net);
bgp_path_info_add(dest, pi);
} else {
if (attrhash_cmp(pi->attr, parent_pi->attr)
&& !CHECK_FLAG(pi->flags, BGP_PATH_REMOVED)) {
bgp_dest_unlock_node(dest);
return 0;
}
/* The attribute has changed. */
/* Add (or update) attribute to hash. */
attr_new = bgp_attr_intern(parent_pi->attr);
/* Restore route, if needed. */
if (CHECK_FLAG(pi->flags, BGP_PATH_REMOVED))
bgp_path_info_restore(dest, pi);
/* Mark if nexthop has changed. */
if (!IPV4_ADDR_SAME(&pi->attr->nexthop, &attr_new->nexthop))
SET_FLAG(pi->flags, BGP_PATH_IGP_CHANGED);
/* Unintern existing, set to new. */
bgp_attr_unintern(&pi->attr);
pi->attr = attr_new;
pi->uptime = bgp_clock();
}
/* Perform route selection and update zebra, if required. */
ret = bgp_evpn_es_route_select_install(bgp, es, dest);
bgp_dest_unlock_node(dest);
return ret;
}
/* Uninstall Type-1/Type-4 route entry from the ES routing table */
static int bgp_evpn_es_route_uninstall(struct bgp *bgp, struct bgp_evpn_es *es,
struct prefix_evpn *p, struct bgp_path_info *parent_pi)
{
int ret;
struct bgp_dest *dest;
struct bgp_path_info *pi;
if (!es->route_table)
return 0;
/* Locate route within the ESI.
* NOTE: There is no RD here.
*/
dest = bgp_node_lookup(es->route_table, (struct prefix *)p);
if (!dest)
return 0;
/* Find matching route entry. */
for (pi = bgp_dest_get_bgp_path_info(dest); pi; pi = pi->next)
if (pi->extra
&& (struct bgp_path_info *)pi->extra->parent ==
parent_pi)
break;
if (!pi) {
bgp_dest_unlock_node(dest);
return 0;
}
/* Mark entry for deletion */
bgp_path_info_delete(dest, pi);
/* Perform route selection and update zebra, if required. */
ret = bgp_evpn_es_route_select_install(bgp, es, dest);
/* Unlock route node. */
bgp_dest_unlock_node(dest);
return ret;
}
/* Install or unistall a Tyoe-4 route in the per-ES routing table */
int bgp_evpn_es_route_install_uninstall(struct bgp *bgp, struct bgp_evpn_es *es,
afi_t afi, safi_t safi, struct prefix_evpn *evp,
struct bgp_path_info *pi, int install)
{
int ret = 0;
if (install)
ret = bgp_evpn_es_route_install(bgp, es, evp, pi);
else
ret = bgp_evpn_es_route_uninstall(bgp, es, evp, pi);
if (ret) {
flog_err(
EC_BGP_EVPN_FAIL,
"%u: Failed to %s EVPN %s route in ESI %s",
bgp->vrf_id,
install ? "install" : "uninstall",
"ES", es->esi_str);
return ret;
}
return 0;
}
/* Delete (and withdraw) local routes for specified ES from global and ES table.
* Also remove all remote routes from the per ES table. Invoked when ES
* is deleted.
*/
static void bgp_evpn_es_route_del_all(struct bgp *bgp, struct bgp_evpn_es *es)
{
struct bgp_dest *dest;
struct bgp_path_info *pi, *nextpi;
/* de-activate the ES */
bgp_evpn_local_es_down(bgp, es);
bgp_evpn_local_type1_evi_route_del(bgp, es);
/* Walk this ES's routing table and delete all routes. */
for (dest = bgp_table_top(es->route_table); dest;
dest = bgp_route_next(dest)) {
for (pi = bgp_dest_get_bgp_path_info(dest);
(pi != NULL) && (nextpi = pi->next, 1); pi = nextpi) {
bgp_path_info_delete(dest, pi);
bgp_path_info_reap(dest, pi);
}
}
}
/*****************************************************************************
* Base APIs for creating MH routes (Type-1 or Type-4) on local ethernet
* segment updates.
*/
/* create or update local EVPN type1/type4 route entry.
*
* This could be in -
* the ES table if ESR/EAD-ES (or)
* the VNI table if EAD-EVI (or)
* the global table if ESR/EAD-ES/EAD-EVI
*
* Note: vpn is applicable only to EAD-EVI routes (NULL for EAD-ES and
* ESR).
*/
int bgp_evpn_mh_route_update(struct bgp *bgp, struct bgp_evpn_es *es,
struct bgpevpn *vpn, afi_t afi, safi_t safi,
struct bgp_dest *dest, struct attr *attr, int add,
struct bgp_path_info **ri, int *route_changed)
{
struct bgp_path_info *tmp_pi = NULL;
struct bgp_path_info *local_pi = NULL; /* local route entry if any */
struct bgp_path_info *remote_pi = NULL; /* remote route entry if any */
struct attr *attr_new = NULL;
struct prefix_evpn *evp;
*ri = NULL;
evp = (struct prefix_evpn *)bgp_dest_get_prefix(dest);
*route_changed = 1;
/* locate the local and remote entries if any */
for (tmp_pi = bgp_dest_get_bgp_path_info(dest); tmp_pi;
tmp_pi = tmp_pi->next) {
if (tmp_pi->peer == bgp->peer_self
&& tmp_pi->type == ZEBRA_ROUTE_BGP
&& tmp_pi->sub_type == BGP_ROUTE_STATIC)
local_pi = tmp_pi;
if (tmp_pi->type == ZEBRA_ROUTE_BGP
&& tmp_pi->sub_type == BGP_ROUTE_IMPORTED
&& CHECK_FLAG(tmp_pi->flags, BGP_PATH_VALID))
remote_pi = tmp_pi;
}
/* we don't expect to see a remote_ri at this point as
* an ES route has {esi, vtep_ip} as the key in the ES-rt-table
* in the VNI-rt-table.
*/
if (remote_pi) {
flog_err(
EC_BGP_ES_INVALID,
"%u ERROR: local es route for ESI: %s Vtep %pI4 also learnt from remote",
bgp->vrf_id, es ? es->esi_str : "Null",
&es->originator_ip);
return -1;
}
if (!local_pi && !add)
return 0;
/* create or update the entry */
if (!local_pi) {
/* Add or update attribute to hash */
attr_new = bgp_attr_intern(attr);
/* Create new route with its attribute. */
tmp_pi = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0,
bgp->peer_self, attr_new, dest);
SET_FLAG(tmp_pi->flags, BGP_PATH_VALID);
if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE) {
bgp_path_info_extra_get(tmp_pi);
tmp_pi->extra->num_labels = 1;
if (vpn)
vni2label(vpn->vni, &tmp_pi->extra->label[0]);
else
tmp_pi->extra->label[0] = 0;
}
/* add the newly created path to the route-node */
bgp_path_info_add(dest, tmp_pi);
} else {
tmp_pi = local_pi;
if (attrhash_cmp(tmp_pi->attr, attr)
&& !CHECK_FLAG(tmp_pi->flags, BGP_PATH_REMOVED))
*route_changed = 0;
else {
/* The attribute has changed.
* Add (or update) attribute to hash.
*/
attr_new = bgp_attr_intern(attr);
bgp_path_info_set_flag(dest, tmp_pi,
BGP_PATH_ATTR_CHANGED);
/* Restore route, if needed. */
if (CHECK_FLAG(tmp_pi->flags, BGP_PATH_REMOVED))
bgp_path_info_restore(dest, tmp_pi);
/* Unintern existing, set to new. */
bgp_attr_unintern(&tmp_pi->attr);
tmp_pi->attr = attr_new;
tmp_pi->uptime = bgp_clock();
}
}
if (*route_changed) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug(
"local ES %s vni %u route-type %s nexthop %pI4 updated",
es ? es->esi_str : "Null", vpn ? vpn->vni : 0,
evp->prefix.route_type == BGP_EVPN_ES_ROUTE
? "esr"
: (vpn ? "ead-evi" : "ead-es"),
&attr->mp_nexthop_global_in);
}
/* Return back the route entry. */
*ri = tmp_pi;
return 0;
}
/* Delete local EVPN ESR (type-4) and EAD (type-1) route
*
* Note: vpn is applicable only to EAD-EVI routes (NULL for EAD-ES and
* ESR).
*/
static int bgp_evpn_mh_route_delete(struct bgp *bgp, struct bgp_evpn_es *es,
struct bgpevpn *vpn, struct prefix_evpn *p)
{
afi_t afi = AFI_L2VPN;
safi_t safi = SAFI_EVPN;
struct bgp_path_info *pi;
struct bgp_dest *dest = NULL; /* dest in esi table */
struct bgp_dest *global_dest = NULL; /* dest in global table */
struct bgp_table *rt_table;
struct prefix_rd *prd;
if (vpn) {
rt_table = vpn->route_table;
prd = &vpn->prd;
} else {
rt_table = es->route_table;
prd = &es->prd;
}
/* First, locate the route node within the ESI or VNI.
* If it doesn't exist, ther is nothing to do.
* Note: there is no RD here.
*/
dest = bgp_node_lookup(rt_table, (struct prefix *)p);
if (!dest)
return 0;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug(
"local ES %s vni %u route-type %s nexthop %pI4 delete",
es->esi_str, vpn ? vpn->vni : 0,
p->prefix.route_type == BGP_EVPN_ES_ROUTE
? "esr"
: (vpn ? "ead-evi" : "ead-es"),
&es->originator_ip);
/* Next, locate route node in the global EVPN routing table.
* Note that this table is a 2-level tree (RD-level + Prefix-level)
*/
global_dest =
bgp_global_evpn_node_lookup(bgp->rib[afi][safi], afi, safi,
(const struct prefix_evpn *)p, prd);
if (global_dest) {
/* Delete route entry in the global EVPN table. */
delete_evpn_route_entry(bgp, afi, safi, global_dest, &pi);
/* Schedule for processing - withdraws to peers happen from
* this table.
*/
if (pi)
bgp_process(bgp, global_dest, afi, safi);
bgp_dest_unlock_node(global_dest);
}
/*
* Delete route entry in the ESI or VNI routing table.
* This can just be removed.
*/
delete_evpn_route_entry(bgp, afi, safi, dest, &pi);
if (pi)
bgp_path_info_reap(dest, pi);
bgp_dest_unlock_node(dest);
return 0;
}
/*
* This function is called when the VNI RD changes.
* Delete all EAD/EVI local routes for this VNI from the global routing table.
* These routes are scheduled for withdraw from peers.
*/
int delete_global_ead_evi_routes(struct bgp *bgp, struct bgpevpn *vpn)
{
afi_t afi;
safi_t safi;
struct bgp_dest *rdrn, *rn;
struct bgp_table *table;
struct bgp_path_info *pi;
afi = AFI_L2VPN;
safi = SAFI_EVPN;
/* Find the RD node for the VNI in the global table */
rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd);
if (rdrn && bgp_dest_has_bgp_path_info_data(rdrn)) {
table = bgp_dest_get_bgp_table_info(rdrn);
/*
* Iterate over all the routes in this table and delete EAD/EVI
* routes
*/
for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p;
if (evp->prefix.route_type != BGP_EVPN_AD_ROUTE)
continue;
delete_evpn_route_entry(bgp, afi, safi, rn, &pi);
if (pi)
bgp_process(bgp, rn, afi, safi);
}
}
/* Unlock RD node. */
if (rdrn)
bgp_dest_unlock_node(rdrn);
return 0;
}
/*****************************************************************************
* Ethernet Segment (Type-4) Routes
* ESRs are used for DF election. Currently service-carving described in
* RFC 7432 is NOT supported. Instead preference based DF election is
* used by default.
* Reference: draft-ietf-bess-evpn-pref-df
*/
/* Build extended community for EVPN ES (type-4) route */
static void bgp_evpn_type4_route_extcomm_build(struct bgp_evpn_es *es,
struct attr *attr)
{
struct ecommunity ecom_encap;
struct ecommunity ecom_es_rt;
struct ecommunity ecom_df;
struct ecommunity_val eval;
struct ecommunity_val eval_es_rt;
struct ecommunity_val eval_df;
bgp_encap_types tnl_type;
struct ethaddr mac;
/* Encap */
tnl_type = BGP_ENCAP_TYPE_VXLAN;
memset(&ecom_encap, 0, sizeof(ecom_encap));
encode_encap_extcomm(tnl_type, &eval);
ecom_encap.size = 1;
ecom_encap.unit_size = ECOMMUNITY_SIZE;
ecom_encap.val = (uint8_t *)eval.val;
attr->ecommunity = ecommunity_dup(&ecom_encap);
/* ES import RT */
memset(&mac, 0, sizeof(struct ethaddr));
memset(&ecom_es_rt, 0, sizeof(ecom_es_rt));
es_get_system_mac(&es->esi, &mac);
encode_es_rt_extcomm(&eval_es_rt, &mac);
ecom_es_rt.size = 1;
ecom_es_rt.unit_size = ECOMMUNITY_SIZE;
ecom_es_rt.val = (uint8_t *)eval_es_rt.val;
attr->ecommunity =
ecommunity_merge(attr->ecommunity, &ecom_es_rt);
/* DF election extended community */
memset(&ecom_df, 0, sizeof(ecom_df));
encode_df_elect_extcomm(&eval_df, es->df_pref);
ecom_df.size = 1;
ecom_df.val = (uint8_t *)eval_df.val;
attr->ecommunity = ecommunity_merge(attr->ecommunity, &ecom_df);
attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES);
}
/* Create or update local type-4 route */
static int bgp_evpn_type4_route_update(struct bgp *bgp,
struct bgp_evpn_es *es, struct prefix_evpn *p)
{
int ret = 0;
int route_changed = 0;
afi_t afi = AFI_L2VPN;
safi_t safi = SAFI_EVPN;
struct attr attr;
struct attr *attr_new = NULL;
struct bgp_dest *dest = NULL;
struct bgp_path_info *pi = NULL;
memset(&attr, 0, sizeof(struct attr));
/* Build path-attribute for this route. */
bgp_attr_default_set(&attr, BGP_ORIGIN_IGP);
attr.nexthop = es->originator_ip;
attr.mp_nexthop_global_in = es->originator_ip;
attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4;
/* Set up extended community. */
bgp_evpn_type4_route_extcomm_build(es, &attr);
/* First, create (or fetch) route node within the ESI. */
/* NOTE: There is no RD here. */
dest = bgp_node_get(es->route_table, (struct prefix *)p);
/* Create or update route entry. */
ret = bgp_evpn_mh_route_update(bgp, es, NULL, afi, safi, dest, &attr, 1,
&pi, &route_changed);
if (ret != 0)
flog_err(
EC_BGP_ES_INVALID,
"%u ERROR: Failed to updated ES route ESI: %s VTEP %pI4",
bgp->vrf_id, es->esi_str, &es->originator_ip);
assert(pi);
attr_new = pi->attr;
/* Perform route selection;
* this is just to set the flags correctly
* as local route in the ES always wins.
*/
bgp_evpn_es_route_select_install(bgp, es, dest);
bgp_dest_unlock_node(dest);
/* If this is a new route or some attribute has changed, export the
* route to the global table. The route will be advertised to peers
* from there. Note that this table is a 2-level tree (RD-level +
* Prefix-level) similar to L3VPN routes.
*/
if (route_changed) {
struct bgp_path_info *global_pi;
dest = bgp_global_evpn_node_get(bgp->rib[afi][safi], afi, safi,
p, &es->prd);
bgp_evpn_mh_route_update(bgp, es, NULL, afi, safi, dest,
attr_new, 1, &global_pi,
&route_changed);
/* Schedule for processing and unlock node. */
bgp_process(bgp, dest, afi, safi);
bgp_dest_unlock_node(dest);
}
/* Unintern temporary. */
aspath_unintern(&attr.aspath);
return 0;
}
/* Delete local type-4 route */
static int bgp_evpn_type4_route_delete(struct bgp *bgp,
struct bgp_evpn_es *es, struct prefix_evpn *p)
{
return bgp_evpn_mh_route_delete(bgp, es, NULL /* l2vni */, p);
}
/* Process remote/received EVPN type-4 route (advertise or withdraw) */
int bgp_evpn_type4_route_process(struct peer *peer, afi_t afi, safi_t safi,
struct attr *attr, uint8_t *pfx, int psize,
uint32_t addpath_id)
{
int ret;
esi_t esi;
uint8_t ipaddr_len;
struct in_addr vtep_ip;
struct prefix_rd prd;
struct prefix_evpn p;
/* Type-4 route should be either 23 or 35 bytes
* RD (8), ESI (10), ip-len (1), ip (4 or 16)
*/
if (psize != BGP_EVPN_TYPE4_V4_PSIZE &&
psize != BGP_EVPN_TYPE4_V6_PSIZE) {
flog_err(EC_BGP_EVPN_ROUTE_INVALID,
"%u:%s - Rx EVPN Type-4 NLRI with invalid length %d",
peer->bgp->vrf_id, peer->host, psize);
return -1;
}
/* Make prefix_rd */
prd.family = AF_UNSPEC;
prd.prefixlen = 64;
memcpy(&prd.val, pfx, RD_BYTES);
pfx += RD_BYTES;
/* get the ESI */
memcpy(&esi, pfx, ESI_BYTES);
pfx += ESI_BYTES;
/* Get the IP. */
ipaddr_len = *pfx++;
if (ipaddr_len == IPV4_MAX_BITLEN) {
memcpy(&vtep_ip, pfx, IPV4_MAX_BYTELEN);
} else {
flog_err(
EC_BGP_EVPN_ROUTE_INVALID,
"%u:%s - Rx EVPN Type-4 NLRI with unsupported IP address length %d",
peer->bgp->vrf_id, peer->host, ipaddr_len);
return -1;
}
build_evpn_type4_prefix(&p, &esi, vtep_ip);
/* Process the route. */
if (attr) {
ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr,
afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL,
&prd, NULL, 0, 0, NULL);
} else {
ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr,
afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL,
&prd, NULL, 0, NULL);
}
return ret;
}
/* Check if a prefix belongs to the local ES */
static bool bgp_evpn_type4_prefix_match(struct prefix_evpn *p,
struct bgp_evpn_es *es)
{
return (p->prefix.route_type == BGP_EVPN_ES_ROUTE) &&
!memcmp(&p->prefix.es_addr.esi, &es->esi, sizeof(esi_t));
}
/* Import remote ESRs on local ethernet segment add */
static int bgp_evpn_type4_remote_routes_import(struct bgp *bgp,
struct bgp_evpn_es *es, bool install)
{
int ret;
afi_t afi;
safi_t safi;
struct bgp_dest *rd_dest, *dest;
struct bgp_table *table;
struct bgp_path_info *pi;
afi = AFI_L2VPN;
safi = SAFI_EVPN;
/* Walk entire global routing table and evaluate routes which could be
* imported into this Ethernet Segment.
*/
for (rd_dest = bgp_table_top(bgp->rib[afi][safi]); rd_dest;
rd_dest = bgp_route_next(rd_dest)) {
table = bgp_dest_get_bgp_table_info(rd_dest);
if (!table)
continue;
for (dest = bgp_table_top(table); dest;
dest = bgp_route_next(dest)) {
struct prefix_evpn *evp =
(struct prefix_evpn *)bgp_dest_get_prefix(dest);
for (pi = bgp_dest_get_bgp_path_info(dest); pi;
pi = pi->next) {
/*
* Consider "valid" remote routes applicable for
* this ES.
*/
if (!(CHECK_FLAG(pi->flags, BGP_PATH_VALID)
&& pi->type == ZEBRA_ROUTE_BGP
&& pi->sub_type == BGP_ROUTE_NORMAL))
continue;
if (!bgp_evpn_type4_prefix_match(evp, es))
continue;
if (install)
ret = bgp_evpn_es_route_install(
bgp, es, evp, pi);
else
ret = bgp_evpn_es_route_uninstall(
bgp, es, evp, pi);
if (ret) {
flog_err(
EC_BGP_EVPN_FAIL,
"Failed to %s EVPN %pFX route in ESI %s",
install ? "install"
: "uninstall",
evp, es->esi_str);
bgp_dest_unlock_node(rd_dest);
bgp_dest_unlock_node(dest);
return ret;
}
}
}
}
return 0;
}
/*****************************************************************************
* Ethernet Auto Discovery (EAD/Type-1) route handling
* There are two types of EAD routes -
* 1. EAD-per-ES - Key: {ESI, ET=0xffffffff}
* 2. EAD-per-EVI - Key: {ESI, ET=0}
*/
/* Extended communities associated with EAD-per-ES */
static void bgp_evpn_type1_es_route_extcomm_build(struct bgp_evpn_es *es,
struct attr *attr)
{
struct ecommunity ecom_encap;
struct ecommunity ecom_esi_label;
struct ecommunity_val eval;
struct ecommunity_val eval_esi_label;
bgp_encap_types tnl_type;
struct listnode *evi_node, *rt_node;
struct ecommunity *ecom;
struct bgp_evpn_es_evi *es_evi;
/* Encap */
tnl_type = BGP_ENCAP_TYPE_VXLAN;
memset(&ecom_encap, 0, sizeof(ecom_encap));
encode_encap_extcomm(tnl_type, &eval);
ecom_encap.size = 1;
ecom_encap.unit_size = ECOMMUNITY_SIZE;
ecom_encap.val = (uint8_t *)eval.val;
attr->ecommunity = ecommunity_dup(&ecom_encap);
/* ESI label */
encode_esi_label_extcomm(&eval_esi_label,
false /*single_active*/);
ecom_esi_label.size = 1;
ecom_esi_label.unit_size = ECOMMUNITY_SIZE;
ecom_esi_label.val = (uint8_t *)eval_esi_label.val;
attr->ecommunity =
ecommunity_merge(attr->ecommunity, &ecom_esi_label);
/* Add export RTs for all L2-VNIs associated with this ES */
/* XXX - suppress EAD-ES advertisment if there are no EVIs associated
* with it.
*/
for (ALL_LIST_ELEMENTS_RO(es->es_evi_list,
evi_node, es_evi)) {
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
continue;
for (ALL_LIST_ELEMENTS_RO(es_evi->vpn->export_rtl,
rt_node, ecom))
attr->ecommunity = ecommunity_merge(attr->ecommunity,
ecom);
}
attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES);
}
/* Extended communities associated with EAD-per-EVI */
static void bgp_evpn_type1_evi_route_extcomm_build(struct bgp_evpn_es *es,
struct bgpevpn *vpn, struct attr *attr)
{
struct ecommunity ecom_encap;
struct ecommunity_val eval;
bgp_encap_types tnl_type;
struct listnode *rt_node;
struct ecommunity *ecom;
/* Encap */
tnl_type = BGP_ENCAP_TYPE_VXLAN;
memset(&ecom_encap, 0, sizeof(ecom_encap));
encode_encap_extcomm(tnl_type, &eval);
ecom_encap.size = 1;
ecom_encap.unit_size = ECOMMUNITY_SIZE;
ecom_encap.val = (uint8_t *)eval.val;
attr->ecommunity = ecommunity_dup(&ecom_encap);
/* Add export RTs for the L2-VNI */
for (ALL_LIST_ELEMENTS_RO(vpn->export_rtl, rt_node, ecom))
attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom);
attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES);
}
/* Update EVPN EAD (type-1) route -
* vpn - valid for EAD-EVI routes and NULL for EAD-ES routes
*/
static int bgp_evpn_type1_route_update(struct bgp *bgp,
struct bgp_evpn_es *es, struct bgpevpn *vpn,
struct prefix_evpn *p)
{
int ret = 0;
afi_t afi = AFI_L2VPN;
safi_t safi = SAFI_EVPN;
struct attr attr;
struct attr *attr_new = NULL;
struct bgp_dest *dest = NULL;
struct bgp_path_info *pi = NULL;
int route_changed = 0;
struct prefix_rd *global_rd;
memset(&attr, 0, sizeof(struct attr));
/* Build path-attribute for this route. */
bgp_attr_default_set(&attr, BGP_ORIGIN_IGP);
attr.nexthop = es->originator_ip;
attr.mp_nexthop_global_in = es->originator_ip;
attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4;
if (vpn) {
/* EAD-EVI route update */
/* MPLS label */
vni2label(vpn->vni, &(attr.label));
/* Set up extended community */
bgp_evpn_type1_evi_route_extcomm_build(es, vpn, &attr);
/* First, create (or fetch) route node within the VNI. */
dest = bgp_node_get(vpn->route_table, (struct prefix *)p);
/* Create or update route entry. */
ret = bgp_evpn_mh_route_update(bgp, es, vpn, afi, safi, dest,
&attr, 1, &pi, &route_changed);
if (ret != 0)
flog_err(
EC_BGP_ES_INVALID,
"%u Failed to update EAD-EVI route ESI: %s VNI %u VTEP %pI4",
bgp->vrf_id, es->esi_str, vpn->vni,
&es->originator_ip);
global_rd = &vpn->prd;
} else {
/* EAD-ES route update */
/* MPLS label is 0 for EAD-ES route */
/* Set up extended community */
bgp_evpn_type1_es_route_extcomm_build(es, &attr);
/* First, create (or fetch) route node within the ES. */
/* NOTE: There is no RD here. */
/* XXX: fragment ID must be included as a part of the prefix. */
dest = bgp_node_get(es->route_table, (struct prefix *)p);
/* Create or update route entry. */
ret = bgp_evpn_mh_route_update(bgp, es, vpn, afi, safi, dest,
&attr, 1, &pi, &route_changed);
if (ret != 0) {
flog_err(
EC_BGP_ES_INVALID,
"%u ERROR: Failed to updated EAD-EVI route ESI: %s VTEP %pI4",
bgp->vrf_id, es->esi_str, &es->originator_ip);
}
global_rd = &es->prd;
}
assert(pi);
attr_new = pi->attr;
/* Perform route selection;
* this is just to set the flags correctly as local route in
* the ES always wins.
*/
evpn_route_select_install(bgp, vpn, dest);
bgp_dest_unlock_node(dest);
/* If this is a new route or some attribute has changed, export the
* route to the global table. The route will be advertised to peers
* from there. Note that this table is a 2-level tree (RD-level +
* Prefix-level) similar to L3VPN routes.
*/
if (route_changed) {
struct bgp_path_info *global_pi;
dest = bgp_global_evpn_node_get(bgp->rib[afi][safi], afi, safi,
p, global_rd);
bgp_evpn_mh_route_update(bgp, es, vpn, afi, safi, dest,
attr_new, 1, &global_pi,
&route_changed);
/* Schedule for processing and unlock node. */
bgp_process(bgp, dest, afi, safi);
bgp_dest_unlock_node(dest);
}
/* Unintern temporary. */
aspath_unintern(&attr.aspath);
return 0;
}
/*
* This function is called when the export RT for a VNI changes.
* Update all type-1 local routes for this VNI from VNI/ES tables and the global
* table and advertise these routes to peers.
*/
void update_type1_routes_for_evi(struct bgp *bgp, struct bgpevpn *vpn)
{
struct prefix_evpn p;
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
struct bgp_evpn_es_evi *es_evi_next;
RB_FOREACH_SAFE(es_evi, bgp_es_evi_rb_head,
&vpn->es_evi_rb_tree, es_evi_next) {
es = es_evi->es;
/* Update EAD-ES */
if (CHECK_FLAG(es->flags, BGP_EVPNES_OPER_UP)) {
build_evpn_type1_prefix(&p, BGP_EVPN_AD_ES_ETH_TAG,
&es->esi, es->originator_ip);
if (bgp_evpn_type1_route_update(bgp, es, NULL, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: EAD-ES route update failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str,
es_evi->vpn->vni);
}
/* Update EAD-EVI */
if (CHECK_FLAG(es->flags, BGP_EVPNES_ADV_EVI)) {
build_evpn_type1_prefix(&p, BGP_EVPN_AD_EVI_ETH_TAG,
&es->esi, es->originator_ip);
if (bgp_evpn_type1_route_update(bgp, es, es_evi->vpn,
&p))
flog_err(EC_BGP_EVPN_ROUTE_DELETE,
"%u: EAD-EVI route update failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str,
es_evi->vpn->vni);
}
}
}
/* Delete local Type-1 route */
static int bgp_evpn_type1_es_route_delete(struct bgp *bgp,
struct bgp_evpn_es *es, struct prefix_evpn *p)
{
return bgp_evpn_mh_route_delete(bgp, es, NULL /* l2vni */, p);
}
static int bgp_evpn_type1_evi_route_delete(struct bgp *bgp,
struct bgp_evpn_es *es, struct bgpevpn *vpn,
struct prefix_evpn *p)
{
return bgp_evpn_mh_route_delete(bgp, es, vpn, p);
}
/* Generate EAD-EVI for all VNIs */
static void bgp_evpn_local_type1_evi_route_add(struct bgp *bgp,
struct bgp_evpn_es *es)
{
struct listnode *evi_node;
struct prefix_evpn p;
struct bgp_evpn_es_evi *es_evi;
/* EAD-per-EVI routes have been suppressed */
if (!bgp_mh_info->ead_evi_tx)
return;
if (CHECK_FLAG(es->flags, BGP_EVPNES_ADV_EVI))
/* EAD-EVI route add for this ES is already done */
return;
SET_FLAG(es->flags, BGP_EVPNES_ADV_EVI);
build_evpn_type1_prefix(&p, BGP_EVPN_AD_EVI_ETH_TAG,
&es->esi, es->originator_ip);
for (ALL_LIST_ELEMENTS_RO(es->es_evi_list, evi_node, es_evi)) {
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
continue;
if (bgp_evpn_type1_route_update(bgp, es, es_evi->vpn, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: Type4 route creation failure for ESI %s",
bgp->vrf_id, es->esi_str);
}
}
/*
* Withdraw EAD-EVI for all VNIs
*/
static void bgp_evpn_local_type1_evi_route_del(struct bgp *bgp,
struct bgp_evpn_es *es)
{
struct listnode *evi_node;
struct prefix_evpn p;
struct bgp_evpn_es_evi *es_evi;
/* Delete and withdraw locally learnt EAD-EVI route */
if (!CHECK_FLAG(es->flags, BGP_EVPNES_ADV_EVI))
/* EAD-EVI route has not been advertised for this ES */
return;
UNSET_FLAG(es->flags, BGP_EVPNES_ADV_EVI);
build_evpn_type1_prefix(&p, BGP_EVPN_AD_EVI_ETH_TAG,
&es->esi, es->originator_ip);
for (ALL_LIST_ELEMENTS_RO(es->es_evi_list, evi_node, es_evi)) {
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
continue;
if (bgp_evpn_mh_route_delete(bgp, es, es_evi->vpn, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: Type4 route creation failure for ESI %s",
bgp->vrf_id, es->esi_str);
}
}
/*
* Process received EVPN type-1 route (advertise or withdraw).
*/
int bgp_evpn_type1_route_process(struct peer *peer, afi_t afi, safi_t safi,
struct attr *attr, uint8_t *pfx, int psize,
uint32_t addpath_id)
{
int ret;
struct prefix_rd prd;
esi_t esi;
uint32_t eth_tag;
mpls_label_t label;
struct in_addr vtep_ip;
struct prefix_evpn p;
if (psize != BGP_EVPN_TYPE1_PSIZE) {
flog_err(EC_BGP_EVPN_ROUTE_INVALID,
"%u:%s - Rx EVPN Type-1 NLRI with invalid length %d",
peer->bgp->vrf_id, peer->host, psize);
return -1;
}
/* Make prefix_rd */
prd.family = AF_UNSPEC;
prd.prefixlen = 64;
memcpy(&prd.val, pfx, RD_BYTES);
pfx += RD_BYTES;
/* get the ESI */
memcpy(&esi, pfx, ESI_BYTES);
pfx += ESI_BYTES;
/* Copy Ethernet Tag */
memcpy(&eth_tag, pfx, EVPN_ETH_TAG_BYTES);
eth_tag = ntohl(eth_tag);
pfx += EVPN_ETH_TAG_BYTES;
memcpy(&label, pfx, BGP_LABEL_BYTES);
/* EAD route prefix doesn't include the nexthop in the global
* table
*/
vtep_ip.s_addr = INADDR_ANY;
build_evpn_type1_prefix(&p, eth_tag, &esi, vtep_ip);
/* Process the route. */
if (attr) {
ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr,
afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL,
&prd, NULL, 0, 0, NULL);
} else {
ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr,
afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL,
&prd, NULL, 0, NULL);
}
return ret;
}
/*****************************************************************************/
/* Ethernet Segment Management
* 1. Ethernet Segment is a collection of links attached to the same
* server (MHD) or switch (MHN)
* 2. An Ethernet Segment can span multiple PEs and is identified by the
* 10-byte ES-ID.
* 3. Local ESs are configured in zebra and sent to BGP
* 4. Remote ESs are created by BGP when one or more ES-EVIs reference it i.e.
* created on first reference and release on last de-reference
* 5. An ES can be both local and remote. Infact most local ESs are expected
* to have an ES peer.
*/
/* A list of remote VTEPs is maintained for each ES. This list includes -
* 1. VTEPs for which we have imported the ESR i.e. ES-peers
* 2. VTEPs that have an "active" ES-EVI VTEP i.e. EAD-per-ES and EAD-per-EVI
* have been imported into one or more VNIs
*/
static int bgp_evpn_es_vtep_cmp(void *p1, void *p2)
{
const struct bgp_evpn_es_vtep *es_vtep1 = p1;
const struct bgp_evpn_es_vtep *es_vtep2 = p2;
return es_vtep1->vtep_ip.s_addr - es_vtep2->vtep_ip.s_addr;
}
static struct bgp_evpn_es_vtep *bgp_evpn_es_vtep_new(struct bgp_evpn_es *es,
struct in_addr vtep_ip)
{
struct bgp_evpn_es_vtep *es_vtep;
es_vtep = XCALLOC(MTYPE_BGP_EVPN_ES_VTEP, sizeof(*es_vtep));
es_vtep->es = es;
es_vtep->vtep_ip.s_addr = vtep_ip.s_addr;
inet_ntop(AF_INET, &es_vtep->vtep_ip, es_vtep->vtep_str,
sizeof(es_vtep->vtep_str));
listnode_init(&es_vtep->es_listnode, es_vtep);
listnode_add_sort(es->es_vtep_list, &es_vtep->es_listnode);
return es_vtep;
}
static void bgp_evpn_es_vtep_free(struct bgp_evpn_es_vtep *es_vtep)
{
struct bgp_evpn_es *es = es_vtep->es;
if (CHECK_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ESR) ||
es_vtep->evi_cnt)
/* as long as there is some reference we can't free it */
return;
list_delete_node(es->es_vtep_list, &es_vtep->es_listnode);
XFREE(MTYPE_BGP_EVPN_ES_VTEP, es_vtep);
}
/* check if VTEP is already part of the list */
static struct bgp_evpn_es_vtep *bgp_evpn_es_vtep_find(struct bgp_evpn_es *es,
struct in_addr vtep_ip)
{
struct listnode *node = NULL;
struct bgp_evpn_es_vtep *es_vtep;
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node, es_vtep)) {
if (es_vtep->vtep_ip.s_addr == vtep_ip.s_addr)
return es_vtep;
}
return NULL;
}
/* Send the remote ES to zebra for NHG programming */
static int bgp_zebra_send_remote_es_vtep(struct bgp *bgp,
struct bgp_evpn_es_vtep *es_vtep, bool add)
{
struct bgp_evpn_es *es = es_vtep->es;
struct stream *s;
uint32_t flags = 0;
/* Check socket. */
if (!zclient || zclient->sock < 0)
return 0;
/* Don't try to register if Zebra doesn't know of this instance. */
if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("No zebra instance, not installing remote es %s",
es->esi_str);
return 0;
}
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR)
flags |= ZAPI_ES_VTEP_FLAG_ESR_RXED;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s,
add ? ZEBRA_REMOTE_ES_VTEP_ADD : ZEBRA_REMOTE_ES_VTEP_DEL,
bgp->vrf_id);
stream_put(s, &es->esi, sizeof(esi_t));
stream_put_ipv4(s, es_vtep->vtep_ip.s_addr);
if (add) {
stream_putl(s, flags);
stream_putc(s, es_vtep->df_alg);
stream_putw(s, es_vtep->df_pref);
}
stream_putw_at(s, 0, stream_get_endp(s));
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("Tx %s Remote ESI %s VTEP %pI4", add ? "ADD" : "DEL",
es->esi_str, &es_vtep->vtep_ip);
frrtrace(3, frr_bgp, evpn_mh_vtep_zsend, add, es, es_vtep);
return zclient_send_message(zclient);
}
static void bgp_evpn_es_vtep_re_eval_active(struct bgp *bgp,
struct bgp_evpn_es_vtep *es_vtep,
bool param_change)
{
bool old_active;
bool new_active;
old_active = CHECK_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE);
/* currently we need an active EVI reference to use the VTEP as
* a nexthop. this may change...
*/
if (es_vtep->evi_cnt)
SET_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE);
else
UNSET_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE);
new_active = CHECK_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE);
if ((old_active != new_active) || (new_active && param_change)) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vtep %pI4 %s df %u/%u",
es_vtep->es->esi_str, &es_vtep->vtep_ip,
new_active ? "active" : "inactive",
es_vtep->df_alg, es_vtep->df_pref);
/* send remote ES to zebra */
bgp_zebra_send_remote_es_vtep(bgp, es_vtep, new_active);
/* The NHG is updated first for efficient failover handling.
* Note the NHG can be de-activated while there are bgp
* routes referencing it. Zebra is capable of handling that
* elegantly by holding the NHG till all routes using it are
* removed.
*/
bgp_evpn_l3nhg_update_on_vtep_chg(es_vtep->es);
/* queue up the es for background consistency checks */
bgp_evpn_es_cons_checks_pend_add(es_vtep->es);
}
}
static struct bgp_evpn_es_vtep *bgp_evpn_es_vtep_add(struct bgp *bgp,
struct bgp_evpn_es *es,
struct in_addr vtep_ip,
bool esr, uint8_t df_alg,
uint16_t df_pref)
{
struct bgp_evpn_es_vtep *es_vtep;
bool param_change = false;
es_vtep = bgp_evpn_es_vtep_find(es, vtep_ip);
if (!es_vtep)
es_vtep = bgp_evpn_es_vtep_new(es, vtep_ip);
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vtep %pI4 add %s df %u/%u",
es_vtep->es->esi_str, &es_vtep->vtep_ip,
esr ? "esr" : "ead", df_alg, df_pref);
if (esr) {
SET_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ESR);
if ((es_vtep->df_pref != df_pref)
|| (es_vtep->df_alg != df_alg)) {
param_change = true;
es_vtep->df_pref = df_pref;
es_vtep->df_alg = df_alg;
}
} else {
++es_vtep->evi_cnt;
}
bgp_evpn_es_vtep_re_eval_active(bgp, es_vtep, param_change);
return es_vtep;
}
static void bgp_evpn_es_vtep_do_del(struct bgp *bgp,
struct bgp_evpn_es_vtep *es_vtep, bool esr)
{
bool param_change = false;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vtep %pI4 del %s", es_vtep->es->esi_str,
&es_vtep->vtep_ip, esr ? "esr" : "ead");
if (esr) {
UNSET_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ESR);
if (es_vtep->df_pref || es_vtep->df_alg) {
param_change = true;
es_vtep->df_pref = 0;
es_vtep->df_alg = 0;
}
} else {
if (es_vtep->evi_cnt)
--es_vtep->evi_cnt;
}
bgp_evpn_es_vtep_re_eval_active(bgp, es_vtep, param_change);
bgp_evpn_es_vtep_free(es_vtep);
}
static void bgp_evpn_es_vtep_del(struct bgp *bgp,
struct bgp_evpn_es *es, struct in_addr vtep_ip, bool esr)
{
struct bgp_evpn_es_vtep *es_vtep;
es_vtep = bgp_evpn_es_vtep_find(es, vtep_ip);
if (es_vtep)
bgp_evpn_es_vtep_do_del(bgp, es_vtep, esr);
}
/********************** ES MAC-IP paths *************************************
* 1. Local MAC-IP routes in the VNI routing table are linked to the
* destination ES (macip_evi_path_list) for efficient updates on ES oper
* state changes.
* 2. Non-local MAC-IP routes in the global routing table are linked to
* the detination for efficient updates on -
* a. VTEP add/del - this results in a L3NHG update.
* b. ES-VRF add/del - this may result in the host route being migrated to
* L3NHG or vice versa (flat multipath list).
****************************************************************************/
static void bgp_evpn_path_es_info_free(struct bgp_path_es_info *es_info)
{
bgp_evpn_path_es_unlink(es_info);
XFREE(MTYPE_BGP_EVPN_PATH_ES_INFO, es_info);
}
void bgp_evpn_path_mh_info_free(struct bgp_path_mh_info *mh_info)
{
if (mh_info->es_info)
bgp_evpn_path_es_info_free(mh_info->es_info);
if (mh_info->nh_info)
bgp_evpn_path_nh_info_free(mh_info->nh_info);
XFREE(MTYPE_BGP_EVPN_PATH_MH_INFO, mh_info);
}
static struct bgp_path_es_info *
bgp_evpn_path_es_info_new(struct bgp_path_info *pi, vni_t vni)
{
struct bgp_path_info_extra *e;
struct bgp_path_mh_info *mh_info;
struct bgp_path_es_info *es_info;
e = bgp_path_info_extra_get(pi);
/* If mh_info doesn't exist allocate it */
mh_info = e->mh_info;
if (!mh_info)
e->mh_info = mh_info = XCALLOC(MTYPE_BGP_EVPN_PATH_MH_INFO,
sizeof(struct bgp_path_mh_info));
/* If es_info doesn't exist allocate it */
es_info = mh_info->es_info;
if (!es_info) {
mh_info->es_info = es_info =
XCALLOC(MTYPE_BGP_EVPN_PATH_ES_INFO,
sizeof(struct bgp_path_es_info));
es_info->vni = vni;
es_info->pi = pi;
}
return es_info;
}
static void bgp_evpn_path_es_unlink(struct bgp_path_es_info *es_info)
{
struct bgp_evpn_es *es = es_info->es;
struct bgp_path_info *pi;
if (!es)
return;
pi = es_info->pi;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("vni %u path %pFX unlinked from es %s", es_info->vni,
&pi->net->p, es->esi_str);
if (es_info->vni)
list_delete_node(es->macip_evi_path_list,
&es_info->es_listnode);
else
list_delete_node(es->macip_global_path_list,
&es_info->es_listnode);
es_info->es = NULL;
/* if there are no other references against the ES it
* needs to be freed
*/
bgp_evpn_es_free(es, __func__);
/* Note we don't free the path es_info on unlink; it will be freed up
* along with the path.
*/
}
void bgp_evpn_path_es_link(struct bgp_path_info *pi, vni_t vni, esi_t *esi)
{
struct bgp_path_es_info *es_info;
struct bgp_evpn_es *es;
struct bgp *bgp_evpn;
es_info = (pi->extra && pi->extra->mh_info)
? pi->extra->mh_info->es_info
: NULL;
/* if the esi is zero just unlink the path from the old es */
if (!esi || !memcmp(esi, zero_esi, sizeof(*esi))) {
if (es_info)
bgp_evpn_path_es_unlink(es_info);
return;
}
bgp_evpn = bgp_get_evpn();
if (!bgp_evpn)
return;
/* setup es_info against the path if it doesn't aleady exist */
if (!es_info)
es_info = bgp_evpn_path_es_info_new(pi, vni);
/* find-create ES */
es = bgp_evpn_es_find(esi);
if (!es)
es = bgp_evpn_es_new(bgp_evpn, esi);
/* dup check */
if (es_info->es == es)
return;
/* unlink old ES if any */
bgp_evpn_path_es_unlink(es_info);
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("vni %u path %pFX linked to es %s", vni, &pi->net->p,
es->esi_str);
/* link mac-ip path to the new destination ES */
es_info->es = es;
listnode_init(&es_info->es_listnode, es_info);
if (es_info->vni)
listnode_add(es->macip_evi_path_list, &es_info->es_listnode);
else
listnode_add(es->macip_global_path_list, &es_info->es_listnode);
}
static bool bgp_evpn_is_macip_path(struct bgp_path_info *pi)
{
struct prefix_evpn *evp;
/* Only MAC-IP routes need to be linked (MAC-only routes can be
* skipped) as these lists are maintained for managing
* host routes in the tenant VRF
*/
evp = (struct prefix_evpn *)&pi->net->p;
return is_evpn_prefix_ipaddr_v4(evp) || is_evpn_prefix_ipaddr_v6(evp);
}
/* When a remote ES is added to a VRF, routes using that as
* a destination need to be migrated to a L3NHG or viceversa.
* This is done indirectly by re-attempting an install of the
* route in the associated VRFs. As a part of the VRF install use
* of l3 NHG is evaluated and this results in the
* attr.es_flag ATTR_ES_USE_L3_NHG being set or cleared.
*/
static void
bgp_evpn_es_path_update_on_es_vrf_chg(struct bgp_evpn_es_vrf *es_vrf,
const char *reason)
{
struct listnode *node;
struct bgp_path_es_info *es_info;
struct bgp_path_info *pi;
struct bgp_evpn_es *es = es_vrf->es;
if (!bgp_mh_info->host_routes_use_l3nhg)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("update paths linked to es %s on es-vrf %s %s",
es->esi_str, es_vrf->bgp_vrf->name, reason);
for (ALL_LIST_ELEMENTS_RO(es->macip_global_path_list, node, es_info)) {
pi = es_info->pi;
if (!bgp_evpn_is_macip_path(pi))
continue;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug(
"update path %pFX linked to es %s on vrf chg",
&pi->net->p, es->esi_str);
bgp_evpn_route_entry_install_if_vrf_match(es_vrf->bgp_vrf, pi,
1);
}
}
/* compare ES-IDs for the global ES RB tree */
static int bgp_es_rb_cmp(const struct bgp_evpn_es *es1,
const struct bgp_evpn_es *es2)
{
return memcmp(&es1->esi, &es2->esi, ESI_BYTES);
}
RB_GENERATE(bgp_es_rb_head, bgp_evpn_es, rb_node, bgp_es_rb_cmp);
struct bgp_evpn_es *bgp_evpn_es_find(const esi_t *esi)
{
struct bgp_evpn_es tmp;
memcpy(&tmp.esi, esi, sizeof(esi_t));
return RB_FIND(bgp_es_rb_head, &bgp_mh_info->es_rb_tree, &tmp);
}
static struct bgp_evpn_es *bgp_evpn_es_new(struct bgp *bgp, const esi_t *esi)
{
struct bgp_evpn_es *es;
if (!bgp)
return NULL;
es = XCALLOC(MTYPE_BGP_EVPN_ES, sizeof(struct bgp_evpn_es));
/* set the ESI */
memcpy(&es->esi, esi, sizeof(esi_t));
/* Initialise the VTEP list */
es->es_vtep_list = list_new();
listset_app_node_mem(es->es_vtep_list);
es->es_vtep_list->cmp = bgp_evpn_es_vtep_cmp;
esi_to_str(&es->esi, es->esi_str, sizeof(es->esi_str));
/* Initialize the ES routing table */
es->route_table = bgp_table_init(bgp, AFI_L2VPN, SAFI_EVPN);
/* Add to rb_tree */
if (RB_INSERT(bgp_es_rb_head, &bgp_mh_info->es_rb_tree, es)) {
XFREE(MTYPE_BGP_EVPN_ES, es);
return NULL;
}
/* Initialise the ES-EVI list */
es->es_evi_list = list_new();
listset_app_node_mem(es->es_evi_list);
/* Initialise the ES-VRF list used for L3NHG management */
es->es_vrf_list = list_new();
listset_app_node_mem(es->es_vrf_list);
/* Initialise the route list used for efficient event handling */
es->macip_evi_path_list = list_new();
listset_app_node_mem(es->macip_evi_path_list);
es->macip_global_path_list = list_new();
listset_app_node_mem(es->macip_global_path_list);
QOBJ_REG(es, bgp_evpn_es);
return es;
}
/* Free a given ES -
* This just frees appropriate memory, caller should have taken other
* needed actions.
*/
static void bgp_evpn_es_free(struct bgp_evpn_es *es, const char *caller)
{
if ((es->flags & (BGP_EVPNES_LOCAL | BGP_EVPNES_REMOTE))
|| listcount(es->macip_evi_path_list)
|| listcount(es->macip_global_path_list))
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("%s: es %s free", caller, es->esi_str);
/* cleanup resources maintained against the ES */
list_delete(&es->es_evi_list);
list_delete(&es->es_vrf_list);
list_delete(&es->es_vtep_list);
list_delete(&es->macip_evi_path_list);
list_delete(&es->macip_global_path_list);
bgp_table_unlock(es->route_table);
/* remove the entry from various databases */
RB_REMOVE(bgp_es_rb_head, &bgp_mh_info->es_rb_tree, es);
bgp_evpn_es_cons_checks_pend_del(es);
QOBJ_UNREG(es);
XFREE(MTYPE_BGP_EVPN_ES, es);
}
static inline bool bgp_evpn_is_es_local_and_non_bypass(struct bgp_evpn_es *es)
{
return (es->flags & BGP_EVPNES_LOCAL)
&& !(es->flags & BGP_EVPNES_BYPASS);
}
/* init local info associated with the ES */
static void bgp_evpn_es_local_info_set(struct bgp *bgp, struct bgp_evpn_es *es)
{
char buf[BGP_EVPN_PREFIX_RD_LEN];
bool old_is_local;
bool is_local;
if (CHECK_FLAG(es->flags, BGP_EVPNES_LOCAL))
return;
old_is_local = bgp_evpn_is_es_local_and_non_bypass(es);
SET_FLAG(es->flags, BGP_EVPNES_LOCAL);
listnode_init(&es->es_listnode, es);
listnode_add(bgp_mh_info->local_es_list, &es->es_listnode);
/* auto derive RD for this es */
bf_assign_index(bm->rd_idspace, es->rd_id);
es->prd.family = AF_UNSPEC;
es->prd.prefixlen = 64;
snprintfrr(buf, sizeof(buf), "%pI4:%hu", &bgp->router_id, es->rd_id);
(void)str2prefix_rd(buf, &es->prd);
is_local = bgp_evpn_is_es_local_and_non_bypass(es);
if (old_is_local != is_local)
bgp_evpn_mac_update_on_es_local_chg(es, is_local);
}
/* clear any local info associated with the ES */
static void bgp_evpn_es_local_info_clear(struct bgp_evpn_es *es, bool finish)
{
bool old_is_local;
bool is_local;
if (!CHECK_FLAG(es->flags, BGP_EVPNES_LOCAL))
return;
old_is_local = bgp_evpn_is_es_local_and_non_bypass(es);
UNSET_FLAG(es->flags, BGP_EVPNES_LOCAL);
is_local = bgp_evpn_is_es_local_and_non_bypass(es);
if (!finish && (old_is_local != is_local))
bgp_evpn_mac_update_on_es_local_chg(es, is_local);
/* remove from the ES local list */
list_delete_node(bgp_mh_info->local_es_list, &es->es_listnode);
bf_release_index(bm->rd_idspace, es->rd_id);
bgp_evpn_es_free(es, __func__);
}
/* eval remote info associated with the ES */
static void bgp_evpn_es_remote_info_re_eval(struct bgp_evpn_es *es)
{
if (es->remote_es_evi_cnt) {
SET_FLAG(es->flags, BGP_EVPNES_REMOTE);
} else {
if (CHECK_FLAG(es->flags, BGP_EVPNES_REMOTE)) {
UNSET_FLAG(es->flags, BGP_EVPNES_REMOTE);
bgp_evpn_es_free(es, __func__);
}
}
}
/* If ES is present and local it needs to be active/oper-up for
* including L3 EC
*/
bool bgp_evpn_es_add_l3_ecomm_ok(esi_t *esi)
{
struct bgp_evpn_es *es;
if (!esi || !bgp_mh_info->suppress_l3_ecomm_on_inactive_es)
return true;
es = bgp_evpn_es_find(esi);
return (!es || !(es->flags & BGP_EVPNES_LOCAL)
|| bgp_evpn_local_es_is_active(es));
}
static bool bgp_evpn_is_valid_local_path(struct bgp_path_info *pi)
{
return (CHECK_FLAG(pi->flags, BGP_PATH_VALID)
&& pi->type == ZEBRA_ROUTE_BGP
&& pi->sub_type == BGP_ROUTE_STATIC);
}
/* Update all local MAC-IP routes in the VNI routing table associated
* with the ES. When the ES is down the routes are advertised without
* the L3 extcomm
*/
static void bgp_evpn_mac_update_on_es_oper_chg(struct bgp_evpn_es *es)
{
struct listnode *node;
struct bgp_path_es_info *es_info;
struct bgp_path_info *pi;
struct bgp *bgp;
struct bgpevpn *vpn;
if (!bgp_mh_info->suppress_l3_ecomm_on_inactive_es)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("update paths linked to es %s on oper chg",
es->esi_str);
bgp = bgp_get_evpn();
for (ALL_LIST_ELEMENTS_RO(es->macip_evi_path_list, node, es_info)) {
pi = es_info->pi;
if (!bgp_evpn_is_valid_local_path(pi))
continue;
if (!bgp_evpn_is_macip_path(pi))
continue;
vpn = bgp_evpn_lookup_vni(bgp, es_info->vni);
if (!vpn)
continue;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug(
"update path %d %pFX linked to es %s on oper chg",
es_info->vni, &pi->net->p, es->esi_str);
bgp_evpn_update_type2_route_entry(bgp, vpn, pi->net, pi,
__func__);
}
}
static bool bgp_evpn_is_valid_bgp_path(struct bgp_path_info *pi)
{
return (CHECK_FLAG(pi->flags, BGP_PATH_VALID)
&& pi->type == ZEBRA_ROUTE_BGP
&& pi->sub_type == BGP_ROUTE_NORMAL);
}
/* If an ES is no longer local (or becomes local) we need to re-install
* paths using that ES as destination. This is needed as the criteria
* for best path selection has changed.
*/
static void bgp_evpn_mac_update_on_es_local_chg(struct bgp_evpn_es *es,
bool is_local)
{
struct listnode *node;
struct bgp_path_es_info *es_info;
struct bgp_path_info *pi;
bool tmp_local;
struct attr *attr_new;
struct attr attr_tmp;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("update paths linked to es %s on chg to %s",
es->esi_str, is_local ? "local" : "non-local");
for (ALL_LIST_ELEMENTS_RO(es->macip_global_path_list, node, es_info)) {
pi = es_info->pi;
/* Consider "valid" remote routes */
if (!bgp_evpn_is_valid_bgp_path(pi))
continue;
if (!pi->attr)
continue;
tmp_local = !!(pi->attr->es_flags & ATTR_ES_IS_LOCAL);
if (tmp_local == is_local)
continue;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug(
"update path %pFX linked to es %s on chg to %s",
&pi->net->p, es->esi_str,
is_local ? "local" : "non-local");
attr_tmp = *pi->attr;
if (is_local)
attr_tmp.es_flags |= ATTR_ES_IS_LOCAL;
else
attr_tmp.es_flags &= ~ATTR_ES_IS_LOCAL;
attr_new = bgp_attr_intern(&attr_tmp);
bgp_attr_unintern(&pi->attr);
pi->attr = attr_new;
bgp_evpn_import_type2_route(pi, 1);
}
}
static void bgp_evpn_local_es_deactivate(struct bgp *bgp,
struct bgp_evpn_es *es)
{
struct prefix_evpn p;
int ret;
/* withdraw ESR */
/* Delete and withdraw locally learnt ES route */
build_evpn_type4_prefix(&p, &es->esi, es->originator_ip);
ret = bgp_evpn_type4_route_delete(bgp, es, &p);
if (ret) {
flog_err(EC_BGP_EVPN_ROUTE_DELETE,
"%u failed to delete type-4 route for ESI %s",
bgp->vrf_id, es->esi_str);
}
/* withdraw EAD-EVI */
if (!bgp_mh_info->ead_evi_adv_for_down_links)
bgp_evpn_local_type1_evi_route_del(bgp, es);
/* withdraw EAD-ES */
build_evpn_type1_prefix(&p, BGP_EVPN_AD_ES_ETH_TAG,
&es->esi, es->originator_ip);
ret = bgp_evpn_type1_es_route_delete(bgp, es, &p);
if (ret) {
flog_err(EC_BGP_EVPN_ROUTE_DELETE,
"%u failed to delete type-1 route for ESI %s",
bgp->vrf_id, es->esi_str);
}
bgp_evpn_mac_update_on_es_oper_chg(es);
}
/* Process ES link oper-down by withdrawing ES-EAD and ESR */
static void bgp_evpn_local_es_down(struct bgp *bgp, struct bgp_evpn_es *es)
{
bool old_active;
if (!CHECK_FLAG(es->flags, BGP_EVPNES_OPER_UP))
return;
old_active = bgp_evpn_local_es_is_active(es);
UNSET_FLAG(es->flags, BGP_EVPNES_OPER_UP);
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("local es %s down", es->esi_str);
if (old_active)
bgp_evpn_local_es_deactivate(bgp, es);
}
static void bgp_evpn_local_es_activate(struct bgp *bgp, struct bgp_evpn_es *es,
bool regen_ead, bool regen_esr)
{
struct prefix_evpn p;
if (regen_esr) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("local es %s generate ESR", es->esi_str);
/* generate ESR */
build_evpn_type4_prefix(&p, &es->esi, es->originator_ip);
if (bgp_evpn_type4_route_update(bgp, es, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: Type4 route creation failure for ESI %s",
bgp->vrf_id, es->esi_str);
}
if (regen_ead) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("local es %s generate EAD", es->esi_str);
/* generate EAD-EVI */
bgp_evpn_local_type1_evi_route_add(bgp, es);
/* generate EAD-ES */
build_evpn_type1_prefix(&p, BGP_EVPN_AD_ES_ETH_TAG, &es->esi,
es->originator_ip);
(void)bgp_evpn_type1_route_update(bgp, es, NULL, &p);
}
bgp_evpn_mac_update_on_es_oper_chg(es);
}
/* Process ES link oper-up by generating ES-EAD and ESR */
static void bgp_evpn_local_es_up(struct bgp *bgp, struct bgp_evpn_es *es,
bool regen_esr)
{
bool regen_ead = false;
bool active = false;
if (!CHECK_FLAG(es->flags, BGP_EVPNES_OPER_UP)) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("local es %s up", es->esi_str);
SET_FLAG(es->flags, BGP_EVPNES_OPER_UP);
regen_esr = true;
regen_ead = true;
}
active = bgp_evpn_local_es_is_active(es);
if (active && (regen_ead || regen_esr))
bgp_evpn_local_es_activate(bgp, es, regen_ead, regen_esr);
}
/* If an ethernet segment is in LACP bypass we cannot advertise
* reachability to it i.e. EAD-per-ES and ESR is not advertised in
* bypass state.
* PS: EAD-per-EVI will continue to be advertised
*/
static void bgp_evpn_local_es_bypass_update(struct bgp *bgp,
struct bgp_evpn_es *es, bool bypass)
{
bool old_bypass = !!(es->flags & BGP_EVPNES_BYPASS);
bool old_active;
bool new_active;
bool old_is_local;
bool is_local;
if (bypass == old_bypass)
return;
old_active = bgp_evpn_local_es_is_active(es);
old_is_local = bgp_evpn_is_es_local_and_non_bypass(es);
if (bypass)
SET_FLAG(es->flags, BGP_EVPNES_BYPASS);
else
UNSET_FLAG(es->flags, BGP_EVPNES_BYPASS);
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("local es %s bypass %s", es->esi_str,
bypass ? "set" : "clear");
new_active = bgp_evpn_local_es_is_active(es);
if (old_active != new_active) {
if (new_active)
bgp_evpn_local_es_activate(bgp, es, true, true);
else
bgp_evpn_local_es_deactivate(bgp, es);
}
is_local = bgp_evpn_is_es_local_and_non_bypass(es);
if (old_is_local != is_local)
bgp_evpn_mac_update_on_es_local_chg(es, is_local);
}
static void bgp_evpn_local_es_do_del(struct bgp *bgp, struct bgp_evpn_es *es)
{
struct bgp_evpn_es_evi *es_evi;
struct listnode *evi_node, *evi_next_node;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("del local es %s", es->esi_str);
/* Delete all local EVPN ES routes from ESI table
* and schedule for processing (to withdraw from peers))
*/
bgp_evpn_es_route_del_all(bgp, es);
/* release all local ES EVIs associated with the ES */
for (ALL_LIST_ELEMENTS(es->es_evi_list, evi_node,
evi_next_node, es_evi)) {
bgp_evpn_local_es_evi_do_del(es_evi);
}
/* Clear local info associated with the ES and free it up if there is
* no remote reference
*/
bgp_evpn_es_local_info_clear(es, false);
}
bool bgp_evpn_is_esi_local_and_non_bypass(esi_t *esi)
{
struct bgp_evpn_es *es = NULL;
/* Lookup ESI hash - should exist. */
es = bgp_evpn_es_find(esi);
return es && bgp_evpn_is_es_local_and_non_bypass(es);
}
int bgp_evpn_local_es_del(struct bgp *bgp, esi_t *esi)
{
struct bgp_evpn_es *es = NULL;
/* Lookup ESI hash - should exist. */
es = bgp_evpn_es_find(esi);
if (!es) {
flog_warn(EC_BGP_EVPN_ESI, "%u: ES missing at local ES DEL",
bgp->vrf_id);
return -1;
}
bgp_evpn_local_es_do_del(bgp, es);
return 0;
}
/* Handle device to ES id association. Results in the creation of a local
* ES.
*/
int bgp_evpn_local_es_add(struct bgp *bgp, esi_t *esi,
struct in_addr originator_ip, bool oper_up,
uint16_t df_pref, bool bypass)
{
char buf[ESI_STR_LEN];
struct bgp_evpn_es *es;
bool new_es = true;
bool regen_esr = false;
/* create the new es */
es = bgp_evpn_es_find(esi);
if (es) {
if (CHECK_FLAG(es->flags, BGP_EVPNES_LOCAL))
new_es = false;
} else {
es = bgp_evpn_es_new(bgp, esi);
if (!es) {
flog_err(EC_BGP_ES_CREATE,
"%u: Failed to allocate ES entry for ESI %s - at Local ES Add",
bgp->vrf_id, esi_to_str(esi, buf, sizeof(buf)));
return -1;
}
}
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("add local es %s orig-ip %pI4 df_pref %u %s",
es->esi_str, &originator_ip, df_pref,
bypass ? "bypass" : "");
es->originator_ip = originator_ip;
if (df_pref != es->df_pref) {
es->df_pref = df_pref;
regen_esr = true;
}
bgp_evpn_es_local_info_set(bgp, es);
/* import all remote Type-4 routes in the ES table */
if (new_es)
bgp_evpn_type4_remote_routes_import(bgp, es,
true /* install */);
/* create and advertise EAD-EVI routes for the ES -
* XXX - till an ES-EVI reference is created there is really nothing to
* advertise
*/
if (bgp_mh_info->ead_evi_adv_for_down_links)
bgp_evpn_local_type1_evi_route_add(bgp, es);
bgp_evpn_local_es_bypass_update(bgp, es, bypass);
/* If the ES link is operationally up generate EAD-ES. EAD-EVI
* can be generated even if the link is inactive.
*/
if (oper_up)
bgp_evpn_local_es_up(bgp, es, regen_esr);
else
bgp_evpn_local_es_down(bgp, es);
return 0;
}
static char *bgp_evpn_es_vteps_str(char *vtep_str, struct bgp_evpn_es *es,
uint8_t vtep_str_size)
{
char vtep_flag_str[BGP_EVPN_FLAG_STR_SZ];
struct listnode *node;
struct bgp_evpn_es_vtep *es_vtep;
bool first = true;
char ip_buf[INET6_ADDRSTRLEN];
vtep_str[0] = '\0';
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node, es_vtep)) {
vtep_flag_str[0] = '\0';
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR)
strlcat(vtep_flag_str, "E", sizeof(vtep_flag_str));
if (es_vtep->flags & BGP_EVPNES_VTEP_ACTIVE)
strlcat(vtep_flag_str, "A", sizeof(vtep_flag_str));
if (!strlen(vtep_flag_str))
strlcat(vtep_flag_str, "-", sizeof(vtep_flag_str));
if (first)
first = false;
else
strlcat(vtep_str, ",", vtep_str_size);
strlcat(vtep_str,
inet_ntop(AF_INET, &es_vtep->vtep_ip, ip_buf,
sizeof(ip_buf)),
vtep_str_size);
strlcat(vtep_str, "(", vtep_str_size);
strlcat(vtep_str, vtep_flag_str, vtep_str_size);
strlcat(vtep_str, ")", vtep_str_size);
}
return vtep_str;
}
static void bgp_evpn_es_json_vtep_fill(json_object *json_vteps,
struct bgp_evpn_es_vtep *es_vtep)
{
json_object *json_vtep_entry;
json_object *json_flags;
json_vtep_entry = json_object_new_object();
json_object_string_addf(json_vtep_entry, "vtep_ip", "%pI4",
&es_vtep->vtep_ip);
if (es_vtep->flags & (BGP_EVPNES_VTEP_ESR |
BGP_EVPNES_VTEP_ACTIVE)) {
json_flags = json_object_new_array();
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR)
json_array_string_add(json_flags, "esr");
if (es_vtep->flags & BGP_EVPNES_VTEP_ACTIVE)
json_array_string_add(json_flags, "active");
json_object_object_add(json_vtep_entry, "flags", json_flags);
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR) {
json_object_int_add(json_vtep_entry, "dfPreference",
es_vtep->df_pref);
json_object_int_add(json_vtep_entry, "dfAlgorithm",
es_vtep->df_pref);
}
}
json_object_array_add(json_vteps,
json_vtep_entry);
}
static void bgp_evpn_es_vteps_show_detail(struct vty *vty,
struct bgp_evpn_es *es)
{
char vtep_flag_str[BGP_EVPN_FLAG_STR_SZ];
struct listnode *node;
struct bgp_evpn_es_vtep *es_vtep;
char alg_buf[EVPN_DF_ALG_STR_LEN];
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node, es_vtep)) {
vtep_flag_str[0] = '\0';
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR)
strlcat(vtep_flag_str, "E", sizeof(vtep_flag_str));
if (es_vtep->flags & BGP_EVPNES_VTEP_ACTIVE)
strlcat(vtep_flag_str, "A", sizeof(vtep_flag_str));
if (!strlen(vtep_flag_str))
strlcat(vtep_flag_str, "-", sizeof(vtep_flag_str));
vty_out(vty, " %pI4 flags: %s", &es_vtep->vtep_ip,
vtep_flag_str);
if (es_vtep->flags & BGP_EVPNES_VTEP_ESR)
vty_out(vty, " df_alg: %s df_pref: %u\n",
evpn_es_df_alg2str(es_vtep->df_alg, alg_buf,
sizeof(alg_buf)),
es_vtep->df_pref);
else
vty_out(vty, "\n");
}
}
static void bgp_evpn_es_show_entry(struct vty *vty,
struct bgp_evpn_es *es, json_object *json)
{
char buf1[RD_ADDRSTRLEN];
struct listnode *node;
struct bgp_evpn_es_vtep *es_vtep;
if (json) {
json_object *json_vteps;
json_object *json_types;
json_object_string_add(json, "esi", es->esi_str);
json_object_string_add(json, "rd",
prefix_rd2str(&es->prd, buf1,
sizeof(buf1)));
if (es->flags & (BGP_EVPNES_LOCAL | BGP_EVPNES_REMOTE)) {
json_types = json_object_new_array();
if (es->flags & BGP_EVPNES_LOCAL)
json_array_string_add(json_types, "local");
if (es->flags & BGP_EVPNES_REMOTE)
json_array_string_add(json_types, "remote");
json_object_object_add(json, "type", json_types);
}
if (listcount(es->es_vtep_list)) {
json_vteps = json_object_new_array();
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list,
node, es_vtep)) {
bgp_evpn_es_json_vtep_fill(json_vteps, es_vtep);
}
json_object_object_add(json, "vteps", json_vteps);
}
json_object_int_add(json, "vniCount",
listcount(es->es_evi_list));
} else {
char type_str[4];
char vtep_str[ES_VTEP_LIST_STR_SZ + BGP_EVPN_VTEPS_FLAG_STR_SZ];
type_str[0] = '\0';
if (es->flags & BGP_EVPNES_BYPASS)
strlcat(type_str, "B", sizeof(type_str));
if (es->flags & BGP_EVPNES_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
if (es->flags & BGP_EVPNES_REMOTE)
strlcat(type_str, "R", sizeof(type_str));
if (es->inconsistencies)
strlcat(type_str, "I", sizeof(type_str));
bgp_evpn_es_vteps_str(vtep_str, es, sizeof(vtep_str));
if (es->flags & BGP_EVPNES_LOCAL)
prefix_rd2str(&es->prd, buf1, sizeof(buf1));
else
strlcpy(buf1, "-", sizeof(buf1));
vty_out(vty, "%-30s %-5s %-21s %-8d %s\n",
es->esi_str, type_str, buf1,
listcount(es->es_evi_list), vtep_str);
}
}
static void bgp_evpn_es_show_entry_detail(struct vty *vty,
struct bgp_evpn_es *es, json_object *json)
{
if (json) {
json_object *json_flags;
json_object *json_incons;
json_object *json_vteps;
struct listnode *node;
struct bgp_evpn_es_vtep *es_vtep;
/* Add the "brief" info first */
bgp_evpn_es_show_entry(vty, es, json);
if (es->flags
& (BGP_EVPNES_OPER_UP | BGP_EVPNES_ADV_EVI
| BGP_EVPNES_BYPASS)) {
json_flags = json_object_new_array();
if (es->flags & BGP_EVPNES_OPER_UP)
json_array_string_add(json_flags, "up");
if (es->flags & BGP_EVPNES_ADV_EVI)
json_array_string_add(json_flags,
"advertiseEVI");
if (es->flags & BGP_EVPNES_BYPASS)
json_array_string_add(json_flags, "bypass");
json_object_object_add(json, "flags", json_flags);
}
json_object_string_addf(json, "originator_ip", "%pI4",
&es->originator_ip);
json_object_int_add(json, "remoteVniCount",
es->remote_es_evi_cnt);
json_object_int_add(json, "vrfCount",
listcount(es->es_vrf_list));
json_object_int_add(json, "macipPathCount",
listcount(es->macip_evi_path_list));
json_object_int_add(json, "macipGlobalPathCount",
listcount(es->macip_global_path_list));
json_object_int_add(json, "inconsistentVniVtepCount",
es->incons_evi_vtep_cnt);
if (listcount(es->es_vtep_list)) {
json_vteps = json_object_new_array();
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node,
es_vtep)) {
bgp_evpn_es_json_vtep_fill(json_vteps, es_vtep);
}
json_object_object_add(json, "vteps", json_vteps);
}
if (es->inconsistencies) {
json_incons = json_object_new_array();
if (es->inconsistencies & BGP_EVPNES_INCONS_VTEP_LIST)
json_array_string_add(json_incons,
"vni-vtep-mismatch");
json_object_object_add(json, "inconsistencies",
json_incons);
}
} else {
char incons_str[BGP_EVPNES_INCONS_STR_SZ];
char type_str[4];
char buf1[RD_ADDRSTRLEN];
type_str[0] = '\0';
if (es->flags & BGP_EVPNES_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
if (es->flags & BGP_EVPNES_REMOTE)
strlcat(type_str, "R", sizeof(type_str));
if (es->flags & BGP_EVPNES_LOCAL)
prefix_rd2str(&es->prd, buf1, sizeof(buf1));
else
strlcpy(buf1, "-", sizeof(buf1));
vty_out(vty, "ESI: %s\n", es->esi_str);
vty_out(vty, " Type: %s\n", type_str);
vty_out(vty, " RD: %s\n", buf1);
vty_out(vty, " Originator-IP: %pI4\n", &es->originator_ip);
if (es->flags & BGP_EVPNES_LOCAL)
vty_out(vty, " Local ES DF preference: %u\n",
es->df_pref);
if (es->flags & BGP_EVPNES_BYPASS)
vty_out(vty, " LACP bypass: on\n");
vty_out(vty, " VNI Count: %d\n", listcount(es->es_evi_list));
vty_out(vty, " Remote VNI Count: %d\n",
es->remote_es_evi_cnt);
vty_out(vty, " VRF Count: %d\n", listcount(es->es_vrf_list));
vty_out(vty, " MACIP EVI Path Count: %d\n",
listcount(es->macip_evi_path_list));
vty_out(vty, " MACIP Global Path Count: %d\n",
listcount(es->macip_global_path_list));
vty_out(vty, " Inconsistent VNI VTEP Count: %d\n",
es->incons_evi_vtep_cnt);
if (es->inconsistencies) {
incons_str[0] = '\0';
if (es->inconsistencies & BGP_EVPNES_INCONS_VTEP_LIST)
strlcat(incons_str, "vni-vtep-mismatch",
sizeof(incons_str));
} else {
strlcpy(incons_str, "-", sizeof(incons_str));
}
vty_out(vty, " Inconsistencies: %s\n",
incons_str);
if (listcount(es->es_vtep_list)) {
vty_out(vty, " VTEPs:\n");
bgp_evpn_es_vteps_show_detail(vty, es);
}
vty_out(vty, "\n");
}
}
/* Display all ESs */
void bgp_evpn_es_show(struct vty *vty, bool uj, bool detail)
{
struct bgp_evpn_es *es;
json_object *json_array = NULL;
json_object *json = NULL;
if (uj) {
/* create an array of ESs */
json_array = json_object_new_array();
} else {
if (!detail) {
vty_out(vty,
"ES Flags: B - bypass, L local, R remote, I inconsistent\n");
vty_out(vty,
"VTEP Flags: E ESR/Type-4, A active nexthop\n");
vty_out(vty,
"%-30s %-5s %-21s %-8s %s\n",
"ESI", "Flags", "RD", "#VNIs", "VTEPs");
}
}
RB_FOREACH(es, bgp_es_rb_head, &bgp_mh_info->es_rb_tree) {
if (uj)
/* create a separate json object for each ES */
json = json_object_new_object();
if (detail)
bgp_evpn_es_show_entry_detail(vty, es, json);
else
bgp_evpn_es_show_entry(vty, es, json);
/* add ES to the json array */
if (uj)
json_object_array_add(json_array, json);
}
/* print the array of json-ESs */
if (uj)
vty_json(vty, json_array);
}
/* Display specific ES */
void bgp_evpn_es_show_esi(struct vty *vty, esi_t *esi, bool uj)
{
struct bgp_evpn_es *es;
json_object *json = NULL;
if (uj)
json = json_object_new_object();
es = bgp_evpn_es_find(esi);
if (es) {
bgp_evpn_es_show_entry_detail(vty, es, json);
} else {
if (!uj)
vty_out(vty, "ESI not found\n");
}
if (uj)
vty_json(vty, json);
}
/*****************************************************************************/
/* Ethernet Segment to VRF association -
* 1. Each ES-EVI entry is associated with a tenant VRF. This associaton
* triggers the creation of an ES-VRF entry.
* 2. The ES-VRF entry is maintained for the purpose of L3-NHG creation
* 3. Type-2/MAC-IP routes are imported into a tenant VRF and programmed as
* a /32 or host route entry in the dataplane. If the destination of
* the host route is a remote-ES the route is programmed with the
* corresponding (keyed in by {vrf,ES-id}) L3-NHG.
* 4. The reason for this indirection (route->L3-NHG, L3-NHG->list-of-VTEPs)
* is to avoid route updates to the dplane when a remote-ES link flaps i.e.
* instead of updating all the dependent routes the NHG's contents are updated.
* This reduces the amount of datplane updates (nhg updates vs. route updates)
* allowing for a faster failover.
*
* XXX - can the L3 SVI index change without change in vpn->bgp_vrf
* association? If yes we need to handle that by updating all the L3 NHGs
* in that VRF.
*/
/******************************** L3 NHG management *************************/
static void bgp_evpn_l3nhg_zebra_add_v4_or_v6(struct bgp_evpn_es_vrf *es_vrf,
bool v4_nhg)
{
uint32_t nhg_id = v4_nhg ? es_vrf->nhg_id : es_vrf->v6_nhg_id;
struct bgp_evpn_es *es = es_vrf->es;
struct listnode *node;
struct bgp_evpn_es_vtep *es_vtep;
struct nexthop nh;
struct zapi_nexthop *api_nh;
struct zapi_nhg api_nhg = {};
/* Skip installation of L3-NHG if host routes used */
if (!nhg_id)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u %s nhg %u to zebra", es->esi_str,
es_vrf->bgp_vrf->vrf_id,
v4_nhg ? "v4_nhg" : "v6_nhg", nhg_id);
frrtrace(4, frr_bgp, evpn_mh_nhg_zsend, true, v4_nhg, nhg_id, es_vrf);
/* only the gateway ip changes for each NH. rest of the params
* are constant
*/
memset(&nh, 0, sizeof(nh));
nh.vrf_id = es_vrf->bgp_vrf->vrf_id;
nh.flags = NEXTHOP_FLAG_ONLINK;
nh.ifindex = es_vrf->bgp_vrf->l3vni_svi_ifindex;
nh.weight = 1;
nh.type =
v4_nhg ? NEXTHOP_TYPE_IPV4_IFINDEX : NEXTHOP_TYPE_IPV6_IFINDEX;
api_nhg.id = nhg_id;
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node, es_vtep)) {
if (!CHECK_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE))
continue;
/* Don't overrun the zapi buffer. */
if (api_nhg.nexthop_num == MULTIPATH_NUM)
break;
/* overwrite the gw */
if (v4_nhg)
nh.gate.ipv4 = es_vtep->vtep_ip;
else
ipv4_to_ipv4_mapped_ipv6(&nh.gate.ipv6,
es_vtep->vtep_ip);
/* convert to zapi format */
api_nh = &api_nhg.nexthops[api_nhg.nexthop_num];
zapi_nexthop_from_nexthop(api_nh, &nh);
++api_nhg.nexthop_num;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("nhg %u vtep %pI4 l3-svi %d", api_nhg.id,
&es_vtep->vtep_ip,
es_vrf->bgp_vrf->l3vni_svi_ifindex);
frrtrace(3, frr_bgp, evpn_mh_nh_zsend, nhg_id, es_vtep, es_vrf);
}
if (!api_nhg.nexthop_num)
return;
zclient_nhg_send(zclient, ZEBRA_NHG_ADD, &api_nhg);
}
static bool bgp_evpn_l3nhg_zebra_ok(struct bgp_evpn_es_vrf *es_vrf)
{
if (!bgp_mh_info->host_routes_use_l3nhg && !bgp_mh_info->install_l3nhg)
return false;
/* Check socket. */
if (!zclient || zclient->sock < 0)
return false;
return true;
}
static void bgp_evpn_l3nhg_zebra_add(struct bgp_evpn_es_vrf *es_vrf)
{
if (!bgp_evpn_l3nhg_zebra_ok(es_vrf))
return;
bgp_evpn_l3nhg_zebra_add_v4_or_v6(es_vrf, true /*v4_nhg*/);
bgp_evpn_l3nhg_zebra_add_v4_or_v6(es_vrf, false /*v4_nhg*/);
}
static void bgp_evpn_l3nhg_zebra_del_v4_or_v6(struct bgp_evpn_es_vrf *es_vrf,
bool v4_nhg)
{
struct zapi_nhg api_nhg = {};
api_nhg.id = v4_nhg ? es_vrf->nhg_id : es_vrf->v6_nhg_id;
/* Skip installation of L3-NHG if host routes used */
if (!api_nhg.id)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u %s nhg %u to zebra",
es_vrf->es->esi_str, es_vrf->bgp_vrf->vrf_id,
v4_nhg ? "v4_nhg" : "v6_nhg", api_nhg.id);
frrtrace(4, frr_bgp, evpn_mh_nhg_zsend, false, v4_nhg, api_nhg.id,
es_vrf);
zclient_nhg_send(zclient, ZEBRA_NHG_DEL, &api_nhg);
}
static void bgp_evpn_l3nhg_zebra_del(struct bgp_evpn_es_vrf *es_vrf)
{
if (!bgp_evpn_l3nhg_zebra_ok(es_vrf))
return;
bgp_evpn_l3nhg_zebra_del_v4_or_v6(es_vrf, true /*v4_nhg*/);
bgp_evpn_l3nhg_zebra_del_v4_or_v6(es_vrf, false /*v4_nhg*/);
}
static void bgp_evpn_l3nhg_deactivate(struct bgp_evpn_es_vrf *es_vrf)
{
if (!(es_vrf->flags & BGP_EVPNES_VRF_NHG_ACTIVE))
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u nhg %u de-activate",
es_vrf->es->esi_str, es_vrf->bgp_vrf->vrf_id,
es_vrf->nhg_id);
bgp_evpn_l3nhg_zebra_del(es_vrf);
es_vrf->flags &= ~BGP_EVPNES_VRF_NHG_ACTIVE;
/* MAC-IPs can now be installed via the L3NHG */
bgp_evpn_es_path_update_on_es_vrf_chg(es_vrf, "l3nhg-deactivate");
}
static void bgp_evpn_l3nhg_activate(struct bgp_evpn_es_vrf *es_vrf, bool update)
{
if (!bgp_evpn_es_get_active_vtep_cnt(es_vrf->es)) {
bgp_evpn_l3nhg_deactivate(es_vrf);
return;
}
if (es_vrf->flags & BGP_EVPNES_VRF_NHG_ACTIVE) {
if (!update)
return;
} else {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u nhg %u activate",
es_vrf->es->esi_str, es_vrf->bgp_vrf->vrf_id,
es_vrf->nhg_id);
es_vrf->flags |= BGP_EVPNES_VRF_NHG_ACTIVE;
/* MAC-IPs can now be installed via the L3NHG */
bgp_evpn_es_path_update_on_es_vrf_chg(es_vrf, "l3nhg_activate");
}
bgp_evpn_l3nhg_zebra_add(es_vrf);
}
/* when a VTEP is activated or de-activated against an ES associated
* VRFs' NHG needs to be updated
*/
static void bgp_evpn_l3nhg_update_on_vtep_chg(struct bgp_evpn_es *es)
{
struct bgp_evpn_es_vrf *es_vrf;
struct listnode *es_vrf_node;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s nhg update on vtep chg", es->esi_str);
for (ALL_LIST_ELEMENTS_RO(es->es_vrf_list, es_vrf_node, es_vrf))
bgp_evpn_l3nhg_activate(es_vrf, true /* update */);
}
/* compare ES-IDs for the ES-VRF RB tree maintained per-VRF */
static int bgp_es_vrf_rb_cmp(const struct bgp_evpn_es_vrf *es_vrf1,
const struct bgp_evpn_es_vrf *es_vrf2)
{
return memcmp(&es_vrf1->es->esi, &es_vrf2->es->esi, ESI_BYTES);
}
RB_GENERATE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
/* Initialize the ES tables maintained per-tenant vrf */
void bgp_evpn_vrf_es_init(struct bgp *bgp_vrf)
{
/* Initialize the ES-VRF RB tree */
RB_INIT(bgp_es_vrf_rb_head, &bgp_vrf->es_vrf_rb_tree);
}
/* find the ES-VRF in the per-VRF RB tree */
static struct bgp_evpn_es_vrf *bgp_evpn_es_vrf_find(struct bgp_evpn_es *es,
struct bgp *bgp_vrf)
{
struct bgp_evpn_es_vrf es_vrf;
es_vrf.es = es;
return RB_FIND(bgp_es_vrf_rb_head, &bgp_vrf->es_vrf_rb_tree, &es_vrf);
}
/* allocate a new ES-VRF and setup L3NHG for it */
static struct bgp_evpn_es_vrf *bgp_evpn_es_vrf_create(struct bgp_evpn_es *es,
struct bgp *bgp_vrf)
{
struct bgp_evpn_es_vrf *es_vrf;
es_vrf = XCALLOC(MTYPE_BGP_EVPN_ES_VRF, sizeof(*es_vrf));
es_vrf->es = es;
es_vrf->bgp_vrf = bgp_vrf;
/* insert into the VRF-ESI rb tree */
if (RB_INSERT(bgp_es_vrf_rb_head, &bgp_vrf->es_vrf_rb_tree, es_vrf)) {
XFREE(MTYPE_BGP_EVPN_ES_VRF, es_vrf);
return NULL;
}
/* add to the ES's VRF list */
listnode_init(&es_vrf->es_listnode, es_vrf);
listnode_add(es->es_vrf_list, &es_vrf->es_listnode);
/* setup the L3 NHG id for the ES */
es_vrf->nhg_id = bgp_l3nhg_id_alloc();
es_vrf->v6_nhg_id = bgp_l3nhg_id_alloc();
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u nhg %u v6_nhg %d create", es->esi_str,
bgp_vrf->vrf_id, es_vrf->nhg_id, es_vrf->v6_nhg_id);
bgp_evpn_l3nhg_activate(es_vrf, false /* update */);
/* update paths in the VRF that may already be associated with
* this destination ES
*/
bgp_evpn_es_path_update_on_es_vrf_chg(es_vrf, "es-vrf-create");
return es_vrf;
}
/* remove the L3-NHG associated with the ES-VRF and free it */
static void bgp_evpn_es_vrf_delete(struct bgp_evpn_es_vrf *es_vrf)
{
struct bgp_evpn_es *es = es_vrf->es;
struct bgp *bgp_vrf = es_vrf->bgp_vrf;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s vrf %u nhg %u delete", es->esi_str,
bgp_vrf->vrf_id, es_vrf->nhg_id);
/* Remove the NHG resources */
bgp_evpn_l3nhg_deactivate(es_vrf);
if (es_vrf->nhg_id)
bgp_l3nhg_id_free(es_vrf->nhg_id);
es_vrf->nhg_id = 0;
if (es_vrf->v6_nhg_id)
bgp_l3nhg_id_free(es_vrf->v6_nhg_id);
es_vrf->v6_nhg_id = 0;
/* remove from the ES's VRF list */
list_delete_node(es->es_vrf_list, &es_vrf->es_listnode);
/* remove from the VRF-ESI rb tree */
RB_REMOVE(bgp_es_vrf_rb_head, &bgp_vrf->es_vrf_rb_tree, es_vrf);
/* update paths in the VRF that may already be associated with
* this destination ES
*/
bgp_evpn_es_path_update_on_es_vrf_chg(es_vrf, "es-vrf-delete");
XFREE(MTYPE_BGP_EVPN_ES_VRF, es_vrf);
}
/* deref and delete if there are no references */
void bgp_evpn_es_vrf_deref(struct bgp_evpn_es_evi *es_evi)
{
struct bgp_evpn_es_vrf *es_vrf = es_evi->es_vrf;
if (!es_vrf)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es-evi %s vni %u vrf %u de-ref",
es_evi->es->esi_str, es_evi->vpn->vni,
es_vrf->bgp_vrf->vrf_id);
es_evi->es_vrf = NULL;
if (es_vrf->ref_cnt)
--es_vrf->ref_cnt;
if (!es_vrf->ref_cnt)
bgp_evpn_es_vrf_delete(es_vrf);
}
/* find or create and reference */
void bgp_evpn_es_vrf_ref(struct bgp_evpn_es_evi *es_evi, struct bgp *bgp_vrf)
{
struct bgp_evpn_es *es = es_evi->es;
struct bgp_evpn_es_vrf *es_vrf = es_evi->es_vrf;
struct bgp *old_bgp_vrf = NULL;
if (es_vrf)
old_bgp_vrf = es_vrf->bgp_vrf;
if (old_bgp_vrf == bgp_vrf)
return;
/* deref the old ES-VRF */
bgp_evpn_es_vrf_deref(es_evi);
if (!bgp_vrf)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es-evi %s vni %u vrf %u ref", es_evi->es->esi_str,
es_evi->vpn->vni, bgp_vrf->vrf_id);
/* find-create the new ES-VRF */
es_vrf = bgp_evpn_es_vrf_find(es, bgp_vrf);
if (!es_vrf)
es_vrf = bgp_evpn_es_vrf_create(es, bgp_vrf);
if (!es_vrf)
return;
es_evi->es_vrf = es_vrf;
++es_vrf->ref_cnt;
}
/* When the L2-VNI is associated with a L3-VNI/VRF update all the
* associated ES-EVI entries
*/
void bgp_evpn_es_evi_vrf_deref(struct bgpevpn *vpn)
{
struct bgp_evpn_es_evi *es_evi;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es-vrf de-ref for vni %u", vpn->vni);
RB_FOREACH (es_evi, bgp_es_evi_rb_head, &vpn->es_evi_rb_tree)
bgp_evpn_es_vrf_deref(es_evi);
}
void bgp_evpn_es_evi_vrf_ref(struct bgpevpn *vpn)
{
struct bgp_evpn_es_evi *es_evi;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es-vrf ref for vni %u", vpn->vni);
RB_FOREACH (es_evi, bgp_es_evi_rb_head, &vpn->es_evi_rb_tree)
bgp_evpn_es_vrf_ref(es_evi, vpn->bgp_vrf);
}
/* 1. If ES-VRF is not present install the host route with the exploded/flat
* multi-path list.
* 2. If ES-VRF is present -
* - if L3NHG has not been activated for the ES-VRF (this could be because
* all the PEs attached to the VRF are down) do not install the route
* in zebra.
* - if L3NHG has been activated install the route via that L3NHG
*/
void bgp_evpn_es_vrf_use_nhg(struct bgp *bgp_vrf, esi_t *esi, bool *use_l3nhg,
bool *is_l3nhg_active,
struct bgp_evpn_es_vrf **es_vrf_p)
{
struct bgp_evpn_es *es;
struct bgp_evpn_es_vrf *es_vrf;
if (!bgp_mh_info->host_routes_use_l3nhg)
return;
es = bgp_evpn_es_find(esi);
if (!es)
return;
es_vrf = bgp_evpn_es_vrf_find(es, bgp_vrf);
if (!es_vrf)
return;
*use_l3nhg = true;
if (es_vrf->flags & BGP_EVPNES_VRF_NHG_ACTIVE)
*is_l3nhg_active = true;
if (es_vrf_p)
*es_vrf_p = es_vrf;
}
/* returns false if legacy-exploded mp needs to be used for route install */
bool bgp_evpn_path_es_use_nhg(struct bgp *bgp_vrf, struct bgp_path_info *pi,
uint32_t *nhg_p)
{
esi_t *esi;
struct bgp_evpn_es_vrf *es_vrf = NULL;
struct bgp_path_info *parent_pi;
struct bgp_node *rn;
struct prefix_evpn *evp;
struct bgp_path_info *mpinfo;
bool use_l3nhg = false;
bool is_l3nhg_active = false;
*nhg_p = 0;
/* we don't support NHG for routes leaked from another VRF yet */
if (pi->extra && pi->extra->bgp_orig)
return false;
parent_pi = get_route_parent_evpn(pi);
if (!parent_pi)
return false;
rn = parent_pi->net;
if (!rn)
return false;
evp = (struct prefix_evpn *)&rn->p;
if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE)
return false;
/* non-es path, use legacy-exploded multipath */
esi = bgp_evpn_attr_get_esi(parent_pi->attr);
if (!memcmp(esi, zero_esi, sizeof(*esi)))
return false;
bgp_evpn_es_vrf_use_nhg(bgp_vrf, esi, &use_l3nhg, &is_l3nhg_active,
&es_vrf);
/* L3NHG support is disabled, use legacy-exploded multipath */
if (!use_l3nhg)
return false;
/* if the NHG has not been installed we cannot install the route yet,
* return a 0-NHG to indicate that
*/
if (!is_l3nhg_active)
return true;
/* this needs to be set the v6NHG if v6route */
if (is_evpn_prefix_ipaddr_v6(evp))
*nhg_p = es_vrf->v6_nhg_id;
else
*nhg_p = es_vrf->nhg_id;
for (mpinfo = bgp_path_info_mpath_next(pi); mpinfo;
mpinfo = bgp_path_info_mpath_next(mpinfo)) {
/* if any of the paths have a different ESI we can't use
* the NHG associated with the ES. fallback to legacy-exploded
* multipath
*/
if (memcmp(esi, bgp_evpn_attr_get_esi(mpinfo->attr),
sizeof(*esi)))
return false;
}
return true;
}
static void bgp_evpn_es_vrf_show_entry(struct vty *vty,
struct bgp_evpn_es_vrf *es_vrf,
json_object *json)
{
struct bgp_evpn_es *es = es_vrf->es;
struct bgp *bgp_vrf = es_vrf->bgp_vrf;
if (json) {
json_object *json_types;
json_object_string_add(json, "esi", es->esi_str);
json_object_string_add(json, "vrf", bgp_vrf->name);
if (es_vrf->flags & (BGP_EVPNES_VRF_NHG_ACTIVE)) {
json_types = json_object_new_array();
if (es_vrf->flags & BGP_EVPNES_VRF_NHG_ACTIVE)
json_array_string_add(json_types, "active");
json_object_object_add(json, "flags", json_types);
}
json_object_int_add(json, "ipv4NHG", es_vrf->nhg_id);
json_object_int_add(json, "ipv6NHG", es_vrf->v6_nhg_id);
json_object_int_add(json, "refCount", es_vrf->ref_cnt);
} else {
char flags_str[4];
flags_str[0] = '\0';
if (es_vrf->flags & BGP_EVPNES_VRF_NHG_ACTIVE)
strlcat(flags_str, "A", sizeof(flags_str));
vty_out(vty, "%-30s %-15s %-5s %-8u %-8u %u\n", es->esi_str,
bgp_vrf->name, flags_str, es_vrf->nhg_id,
es_vrf->v6_nhg_id, es_vrf->ref_cnt);
}
}
static void bgp_evpn_es_vrf_show_es(struct vty *vty, json_object *json_array,
struct bgp_evpn_es *es)
{
json_object *json = NULL;
struct listnode *es_vrf_node;
struct bgp_evpn_es_vrf *es_vrf;
for (ALL_LIST_ELEMENTS_RO(es->es_vrf_list, es_vrf_node, es_vrf)) {
/* create a separate json object for each ES-VRF */
if (json_array)
json = json_object_new_object();
bgp_evpn_es_vrf_show_entry(vty, es_vrf, json);
/* add ES-VRF to the json array */
if (json_array)
json_object_array_add(json_array, json);
}
}
/* Display all ES VRFs */
void bgp_evpn_es_vrf_show(struct vty *vty, bool uj, struct bgp_evpn_es *es)
{
json_object *json_array = NULL;
if (uj) {
/* create an array of ESs */
json_array = json_object_new_array();
} else {
vty_out(vty, "ES-VRF Flags: A Active\n");
vty_out(vty, "%-30s %-15s %-5s %-8s %-8s %s\n", "ESI", "VRF",
"Flags", "IPv4-NHG", "IPv6-NHG", "Ref");
}
if (es) {
bgp_evpn_es_vrf_show_es(vty, json_array, es);
} else {
RB_FOREACH (es, bgp_es_rb_head, &bgp_mh_info->es_rb_tree)
bgp_evpn_es_vrf_show_es(vty, json_array, es);
}
/* print the array of json-ESs */
if (uj)
vty_json(vty, json_array);
}
/* Display specific ES VRF */
void bgp_evpn_es_vrf_show_esi(struct vty *vty, esi_t *esi, bool uj)
{
struct bgp_evpn_es *es;
es = bgp_evpn_es_find(esi);
if (es) {
bgp_evpn_es_vrf_show(vty, uj, es);
} else {
if (!uj)
vty_out(vty, "ESI not found\n");
}
}
/*****************************************************************************/
/* Ethernet Segment to EVI association -
* 1. The ES-EVI entry is maintained as a RB tree per L2-VNI
* (bgpevpn->es_evi_rb_tree).
* 2. Each local ES-EVI entry is rxed from zebra and then used by BGP to
* advertises an EAD-EVI (Type-1 EVPN) route
* 3. The remote ES-EVI is created when a bgp_evpn_es_evi_vtep references
* it.
*/
/* A list of remote VTEPs is maintained for each ES-EVI. This list includes -
* 1. VTEPs for which we have imported the EAD-per-ES Type1 route
* 2. VTEPs for which we have imported the EAD-per-EVI Type1 route
* VTEPs for which both routes have been rxed are activated. Activation
* creates a NHG in the parent ES.
*/
static int bgp_evpn_es_evi_vtep_cmp(void *p1, void *p2)
{
const struct bgp_evpn_es_evi_vtep *evi_vtep1 = p1;
const struct bgp_evpn_es_evi_vtep *evi_vtep2 = p2;
return evi_vtep1->vtep_ip.s_addr - evi_vtep2->vtep_ip.s_addr;
}
static struct bgp_evpn_es_evi_vtep *bgp_evpn_es_evi_vtep_new(
struct bgp_evpn_es_evi *es_evi, struct in_addr vtep_ip)
{
struct bgp_evpn_es_evi_vtep *evi_vtep;
evi_vtep = XCALLOC(MTYPE_BGP_EVPN_ES_EVI_VTEP, sizeof(*evi_vtep));
evi_vtep->es_evi = es_evi;
evi_vtep->vtep_ip.s_addr = vtep_ip.s_addr;
listnode_init(&evi_vtep->es_evi_listnode, evi_vtep);
listnode_add_sort(es_evi->es_evi_vtep_list, &evi_vtep->es_evi_listnode);
return evi_vtep;
}
static void bgp_evpn_es_evi_vtep_free(struct bgp_evpn_es_evi_vtep *evi_vtep)
{
struct bgp_evpn_es_evi *es_evi = evi_vtep->es_evi;
if (evi_vtep->flags & (BGP_EVPN_EVI_VTEP_EAD))
/* as long as there is some reference we can't free it */
return;
list_delete_node(es_evi->es_evi_vtep_list, &evi_vtep->es_evi_listnode);
XFREE(MTYPE_BGP_EVPN_ES_EVI_VTEP, evi_vtep);
}
/* check if VTEP is already part of the list */
static struct bgp_evpn_es_evi_vtep *bgp_evpn_es_evi_vtep_find(
struct bgp_evpn_es_evi *es_evi, struct in_addr vtep_ip)
{
struct listnode *node = NULL;
struct bgp_evpn_es_evi_vtep *evi_vtep;
for (ALL_LIST_ELEMENTS_RO(es_evi->es_evi_vtep_list, node, evi_vtep)) {
if (evi_vtep->vtep_ip.s_addr == vtep_ip.s_addr)
return evi_vtep;
}
return NULL;
}
/* A VTEP can be added as "active" attach to an ES if EAD-per-ES and
* EAD-per-EVI routes are rxed from it.
*/
static void bgp_evpn_es_evi_vtep_re_eval_active(struct bgp *bgp,
struct bgp_evpn_es_evi_vtep *evi_vtep)
{
bool old_active;
bool new_active;
uint32_t ead_activity_flags;
old_active = CHECK_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE);
if (bgp_mh_info->ead_evi_rx)
/* Both EAD-per-ES and EAD-per-EVI routes must be rxed from a PE
* before it can be activated.
*/
ead_activity_flags = BGP_EVPN_EVI_VTEP_EAD;
else
/* EAD-per-ES is sufficent to activate the PE */
ead_activity_flags = BGP_EVPN_EVI_VTEP_EAD_PER_ES;
if ((evi_vtep->flags & ead_activity_flags) == ead_activity_flags)
SET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE);
else
UNSET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE);
new_active = CHECK_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE);
if (old_active == new_active)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("es %s evi %u vtep %pI4 %s",
evi_vtep->es_evi->es->esi_str,
evi_vtep->es_evi->vpn->vni, &evi_vtep->vtep_ip,
new_active ? "active" : "inactive");
/* add VTEP to parent es */
if (new_active) {
struct bgp_evpn_es_vtep *es_vtep;
es_vtep = bgp_evpn_es_vtep_add(bgp, evi_vtep->es_evi->es,
evi_vtep->vtep_ip, false /*esr*/,
0, 0);
evi_vtep->es_vtep = es_vtep;
} else {
if (evi_vtep->es_vtep) {
bgp_evpn_es_vtep_do_del(bgp, evi_vtep->es_vtep,
false /*esr*/);
evi_vtep->es_vtep = NULL;
}
}
/* queue up the parent es for background consistency checks */
bgp_evpn_es_cons_checks_pend_add(evi_vtep->es_evi->es);
}
static void bgp_evpn_es_evi_vtep_add(struct bgp *bgp,
struct bgp_evpn_es_evi *es_evi, struct in_addr vtep_ip,
bool ead_es)
{
struct bgp_evpn_es_evi_vtep *evi_vtep;
evi_vtep = bgp_evpn_es_evi_vtep_find(es_evi, vtep_ip);
if (!evi_vtep)
evi_vtep = bgp_evpn_es_evi_vtep_new(es_evi, vtep_ip);
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("add es %s evi %u vtep %pI4 %s",
evi_vtep->es_evi->es->esi_str,
evi_vtep->es_evi->vpn->vni, &evi_vtep->vtep_ip,
ead_es ? "ead_es" : "ead_evi");
if (ead_es)
SET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_EAD_PER_ES);
else
SET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_EAD_PER_EVI);
bgp_evpn_es_evi_vtep_re_eval_active(bgp, evi_vtep);
}
static void bgp_evpn_es_evi_vtep_del(struct bgp *bgp,
struct bgp_evpn_es_evi *es_evi, struct in_addr vtep_ip,
bool ead_es)
{
struct bgp_evpn_es_evi_vtep *evi_vtep;
evi_vtep = bgp_evpn_es_evi_vtep_find(es_evi, vtep_ip);
if (!evi_vtep)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("del es %s evi %u vtep %pI4 %s",
evi_vtep->es_evi->es->esi_str,
evi_vtep->es_evi->vpn->vni, &evi_vtep->vtep_ip,
ead_es ? "ead_es" : "ead_evi");
if (ead_es)
UNSET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_EAD_PER_ES);
else
UNSET_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_EAD_PER_EVI);
bgp_evpn_es_evi_vtep_re_eval_active(bgp, evi_vtep);
bgp_evpn_es_evi_vtep_free(evi_vtep);
}
/* compare ES-IDs for the ES-EVI RB tree maintained per-VNI */
static int bgp_es_evi_rb_cmp(const struct bgp_evpn_es_evi *es_evi1,
const struct bgp_evpn_es_evi *es_evi2)
{
return memcmp(&es_evi1->es->esi, &es_evi2->es->esi, ESI_BYTES);
}
RB_GENERATE(bgp_es_evi_rb_head, bgp_evpn_es_evi, rb_node, bgp_es_evi_rb_cmp);
/* find the ES-EVI in the per-L2-VNI RB tree */
static struct bgp_evpn_es_evi *bgp_evpn_es_evi_find(struct bgp_evpn_es *es,
struct bgpevpn *vpn)
{
struct bgp_evpn_es_evi es_evi;
es_evi.es = es;
return RB_FIND(bgp_es_evi_rb_head, &vpn->es_evi_rb_tree, &es_evi);
}
/* allocate a new ES-EVI and insert it into the per-L2-VNI and per-ES
* tables.
*/
static struct bgp_evpn_es_evi *bgp_evpn_es_evi_new(struct bgp_evpn_es *es,
struct bgpevpn *vpn)
{
struct bgp_evpn_es_evi *es_evi;
es_evi = XCALLOC(MTYPE_BGP_EVPN_ES_EVI, sizeof(*es_evi));
es_evi->es = es;
es_evi->vpn = vpn;
/* Initialise the VTEP list */
es_evi->es_evi_vtep_list = list_new();
listset_app_node_mem(es_evi->es_evi_vtep_list);
es_evi->es_evi_vtep_list->cmp = bgp_evpn_es_evi_vtep_cmp;
/* insert into the VNI-ESI rb tree */
if (RB_INSERT(bgp_es_evi_rb_head, &vpn->es_evi_rb_tree, es_evi)) {
XFREE(MTYPE_BGP_EVPN_ES_EVI, es_evi);
return NULL;
}
/* add to the ES's VNI list */
listnode_init(&es_evi->es_listnode, es_evi);
listnode_add(es->es_evi_list, &es_evi->es_listnode);
bgp_evpn_es_vrf_ref(es_evi, vpn->bgp_vrf);
return es_evi;
}
/* remove the ES-EVI from the per-L2-VNI and per-ES tables and free
* up the memory.
*/
static struct bgp_evpn_es_evi *
bgp_evpn_es_evi_free(struct bgp_evpn_es_evi *es_evi)
{
struct bgp_evpn_es *es = es_evi->es;
struct bgpevpn *vpn = es_evi->vpn;
/* cannot free the element as long as there is a local or remote
* reference
*/
if (es_evi->flags & (BGP_EVPNES_EVI_LOCAL | BGP_EVPNES_EVI_REMOTE))
return es_evi;
bgp_evpn_es_vrf_deref(es_evi);
/* remove from the ES's VNI list */
list_delete_node(es->es_evi_list, &es_evi->es_listnode);
/* remove from the VNI-ESI rb tree */
RB_REMOVE(bgp_es_evi_rb_head, &vpn->es_evi_rb_tree, es_evi);
/* free the VTEP list */
list_delete(&es_evi->es_evi_vtep_list);
/* remove from the VNI-ESI rb tree */
XFREE(MTYPE_BGP_EVPN_ES_EVI, es_evi);
return NULL;
}
/* init local info associated with the ES-EVI */
static void bgp_evpn_es_evi_local_info_set(struct bgp_evpn_es_evi *es_evi)
{
struct bgpevpn *vpn = es_evi->vpn;
if (CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
return;
SET_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL);
listnode_init(&es_evi->l2vni_listnode, es_evi);
listnode_add(vpn->local_es_evi_list, &es_evi->l2vni_listnode);
}
/* clear any local info associated with the ES-EVI */
static struct bgp_evpn_es_evi *
bgp_evpn_es_evi_local_info_clear(struct bgp_evpn_es_evi *es_evi)
{
struct bgpevpn *vpn = es_evi->vpn;
UNSET_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL);
list_delete_node(vpn->local_es_evi_list, &es_evi->l2vni_listnode);
return bgp_evpn_es_evi_free(es_evi);
}
/* eval remote info associated with the ES */
static void bgp_evpn_es_evi_remote_info_re_eval(struct bgp_evpn_es_evi *es_evi)
{
struct bgp_evpn_es *es = es_evi->es;
/* if there are remote VTEPs the ES-EVI is classified as "remote" */
if (listcount(es_evi->es_evi_vtep_list)) {
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_REMOTE)) {
SET_FLAG(es_evi->flags, BGP_EVPNES_EVI_REMOTE);
++es->remote_es_evi_cnt;
/* set remote on the parent es */
bgp_evpn_es_remote_info_re_eval(es);
}
} else {
if (CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_REMOTE)) {
UNSET_FLAG(es_evi->flags, BGP_EVPNES_EVI_REMOTE);
if (es->remote_es_evi_cnt)
--es->remote_es_evi_cnt;
bgp_evpn_es_evi_free(es_evi);
/* check if "remote" can be cleared from the
* parent es.
*/
bgp_evpn_es_remote_info_re_eval(es);
}
}
}
static struct bgp_evpn_es_evi *
bgp_evpn_local_es_evi_do_del(struct bgp_evpn_es_evi *es_evi)
{
struct prefix_evpn p;
struct bgp_evpn_es *es = es_evi->es;
struct bgp *bgp;
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
return es_evi;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("del local es %s evi %u",
es_evi->es->esi_str,
es_evi->vpn->vni);
bgp = bgp_get_evpn();
if (bgp) {
/* update EAD-ES with new list of VNIs */
if (bgp_evpn_local_es_is_active(es)) {
build_evpn_type1_prefix(&p, BGP_EVPN_AD_ES_ETH_TAG,
&es->esi, es->originator_ip);
if (bgp_evpn_type1_route_update(bgp, es, NULL, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: EAD-ES route update failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str,
es_evi->vpn->vni);
}
/* withdraw and delete EAD-EVI */
if (CHECK_FLAG(es->flags, BGP_EVPNES_ADV_EVI)) {
build_evpn_type1_prefix(&p, BGP_EVPN_AD_EVI_ETH_TAG,
&es->esi, es->originator_ip);
if (bgp_evpn_type1_evi_route_delete(bgp,
es, es_evi->vpn, &p))
flog_err(EC_BGP_EVPN_ROUTE_DELETE,
"%u: EAD-EVI route deletion failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str,
es_evi->vpn->vni);
}
}
return bgp_evpn_es_evi_local_info_clear(es_evi);
}
int bgp_evpn_local_es_evi_del(struct bgp *bgp, esi_t *esi, vni_t vni)
{
struct bgpevpn *vpn;
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
char buf[ESI_STR_LEN];
es = bgp_evpn_es_find(esi);
if (!es) {
flog_err(
EC_BGP_ES_CREATE,
"%u: Failed to deref VNI %d from ESI %s; ES not present",
bgp->vrf_id, vni,
esi_to_str(esi, buf, sizeof(buf)));
return -1;
}
vpn = bgp_evpn_lookup_vni(bgp, vni);
if (!vpn) {
flog_err(
EC_BGP_ES_CREATE,
"%u: Failed to deref VNI %d from ESI %s; VNI not present",
bgp->vrf_id, vni, es->esi_str);
return -1;
}
es_evi = bgp_evpn_es_evi_find(es, vpn);
if (!es_evi) {
flog_err(
EC_BGP_ES_CREATE,
"%u: Failed to deref VNI %d from ESI %s; ES-VNI not present",
bgp->vrf_id, vni, es->esi_str);
return -1;
}
bgp_evpn_local_es_evi_do_del(es_evi);
return 0;
}
/* Create ES-EVI and advertise the corresponding EAD routes */
int bgp_evpn_local_es_evi_add(struct bgp *bgp, esi_t *esi, vni_t vni)
{
struct bgpevpn *vpn;
struct prefix_evpn p;
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
char buf[ESI_STR_LEN];
es = bgp_evpn_es_find(esi);
if (!es) {
flog_err(
EC_BGP_ES_CREATE,
"%u: Failed to associate VNI %d with ESI %s; ES not present",
bgp->vrf_id, vni,
esi_to_str(esi, buf, sizeof(buf)));
return -1;
}
vpn = bgp_evpn_lookup_vni(bgp, vni);
if (!vpn) {
flog_err(
EC_BGP_ES_CREATE,
"%u: Failed to associate VNI %d with ESI %s; VNI not present",
bgp->vrf_id, vni, es->esi_str);
return -1;
}
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("add local es %s evi %u",
es->esi_str, vni);
es_evi = bgp_evpn_es_evi_find(es, vpn);
if (es_evi) {
if (CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_LOCAL))
/* dup */
return 0;
} else {
es_evi = bgp_evpn_es_evi_new(es, vpn);
if (!es_evi)
return -1;
}
bgp_evpn_es_evi_local_info_set(es_evi);
/* generate an EAD-EVI for this new VNI */
if (CHECK_FLAG(es->flags, BGP_EVPNES_ADV_EVI)) {
build_evpn_type1_prefix(&p, BGP_EVPN_AD_EVI_ETH_TAG, &es->esi,
es->originator_ip);
if (bgp_evpn_type1_route_update(bgp, es, vpn, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: EAD-EVI route creation failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str, vni);
}
/* update EAD-ES */
build_evpn_type1_prefix(&p, BGP_EVPN_AD_ES_ETH_TAG,
&es->esi, es->originator_ip);
if (bgp_evpn_local_es_is_active(es)) {
if (bgp_evpn_type1_route_update(bgp, es, NULL, &p))
flog_err(EC_BGP_EVPN_ROUTE_CREATE,
"%u: EAD-ES route creation failure for ESI %s VNI %u",
bgp->vrf_id, es->esi_str, vni);
}
return 0;
}
/* Add remote ES-EVI entry. This is actually the remote VTEP add and the
* ES-EVI is implicity created on first VTEP's reference.
*/
int bgp_evpn_remote_es_evi_add(struct bgp *bgp, struct bgpevpn *vpn,
const struct prefix_evpn *p)
{
char buf[ESI_STR_LEN];
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
bool ead_es;
const esi_t *esi = &p->prefix.ead_addr.esi;
if (!vpn)
/* local EAD-ES need not be sent back to zebra */
return 0;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("add remote %s es %s evi %u vtep %pI4",
p->prefix.ead_addr.eth_tag ? "ead-es" : "ead-evi",
esi_to_str(esi, buf, sizeof(buf)), vpn->vni,
&p->prefix.ead_addr.ip.ipaddr_v4);
es = bgp_evpn_es_find(esi);
if (!es) {
es = bgp_evpn_es_new(bgp, esi);
if (!es) {
flog_err(EC_BGP_ES_CREATE,
"%u: Failed to allocate ES entry for ESI %s - at remote ES Add",
bgp->vrf_id, esi_to_str(esi, buf, sizeof(buf)));
return -1;
}
}
es_evi = bgp_evpn_es_evi_find(es, vpn);
if (!es_evi) {
es_evi = bgp_evpn_es_evi_new(es, vpn);
if (!es_evi) {
bgp_evpn_es_free(es, __func__);
return -1;
}
}
ead_es = !!p->prefix.ead_addr.eth_tag;
bgp_evpn_es_evi_vtep_add(bgp, es_evi, p->prefix.ead_addr.ip.ipaddr_v4,
ead_es);
bgp_evpn_es_evi_remote_info_re_eval(es_evi);
return 0;
}
/* A remote VTEP has withdrawn. The es-evi-vtep will be deleted and the
* parent es-evi freed up implicitly in last VTEP's deref.
*/
int bgp_evpn_remote_es_evi_del(struct bgp *bgp, struct bgpevpn *vpn,
const struct prefix_evpn *p)
{
char buf[ESI_STR_LEN];
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
bool ead_es;
if (!vpn)
/* local EAD-ES need not be sent back to zebra */
return 0;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug(
"del remote %s es %s evi %u vtep %pI4",
p->prefix.ead_addr.eth_tag ? "ead-es" : "ead-evi",
esi_to_str(&p->prefix.ead_addr.esi, buf, sizeof(buf)),
vpn->vni, &p->prefix.ead_addr.ip.ipaddr_v4);
es = bgp_evpn_es_find(&p->prefix.ead_addr.esi);
if (!es) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("del remote %s es %s evi %u vtep %pI4, NO es",
p->prefix.ead_addr.eth_tag ? "ead-es"
: "ead-evi",
esi_to_str(&p->prefix.ead_addr.esi, buf,
sizeof(buf)),
vpn->vni,
&p->prefix.ead_addr.ip.ipaddr_v4);
return 0;
}
es_evi = bgp_evpn_es_evi_find(es, vpn);
if (!es_evi) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug(
"del remote %s es %s evi %u vtep %pI4, NO es-evi",
p->prefix.ead_addr.eth_tag ? "ead-es"
: "ead-evi",
esi_to_str(&p->prefix.ead_addr.esi, buf,
sizeof(buf)),
vpn->vni,
&p->prefix.ead_addr.ip.ipaddr_v4);
return 0;
}
ead_es = !!p->prefix.ead_addr.eth_tag;
bgp_evpn_es_evi_vtep_del(bgp, es_evi, p->prefix.ead_addr.ip.ipaddr_v4,
ead_es);
bgp_evpn_es_evi_remote_info_re_eval(es_evi);
return 0;
}
/* If a VNI is being deleted we need to force del all remote VTEPs */
static void bgp_evpn_remote_es_evi_flush(struct bgp_evpn_es_evi *es_evi)
{
struct listnode *node = NULL;
struct listnode *nnode = NULL;
struct bgp_evpn_es_evi_vtep *evi_vtep;
struct bgp *bgp;
bgp = bgp_get_evpn();
if (!bgp)
return;
/* delete all VTEPs */
for (ALL_LIST_ELEMENTS(es_evi->es_evi_vtep_list, node, nnode,
evi_vtep)) {
evi_vtep->flags &= ~(BGP_EVPN_EVI_VTEP_EAD_PER_ES
| BGP_EVPN_EVI_VTEP_EAD_PER_EVI);
bgp_evpn_es_evi_vtep_re_eval_active(bgp, evi_vtep);
bgp_evpn_es_evi_vtep_free(evi_vtep);
}
/* delete the EVI */
bgp_evpn_es_evi_remote_info_re_eval(es_evi);
}
/* Initialize the ES tables maintained per-L2_VNI */
void bgp_evpn_vni_es_init(struct bgpevpn *vpn)
{
/* Initialize the ES-EVI RB tree */
RB_INIT(bgp_es_evi_rb_head, &vpn->es_evi_rb_tree);
/* Initialize the local list maintained for quick walks by type */
vpn->local_es_evi_list = list_new();
listset_app_node_mem(vpn->local_es_evi_list);
}
/* Cleanup the ES info maintained per-L2_VNI */
void bgp_evpn_vni_es_cleanup(struct bgpevpn *vpn)
{
struct bgp_evpn_es_evi *es_evi;
struct bgp_evpn_es_evi *es_evi_next;
RB_FOREACH_SAFE(es_evi, bgp_es_evi_rb_head,
&vpn->es_evi_rb_tree, es_evi_next) {
es_evi = bgp_evpn_local_es_evi_do_del(es_evi);
if (es_evi)
bgp_evpn_remote_es_evi_flush(es_evi);
}
list_delete(&vpn->local_es_evi_list);
}
static char *bgp_evpn_es_evi_vteps_str(char *vtep_str,
struct bgp_evpn_es_evi *es_evi,
uint8_t vtep_str_size)
{
char vtep_flag_str[BGP_EVPN_FLAG_STR_SZ];
struct listnode *node;
struct bgp_evpn_es_evi_vtep *evi_vtep;
bool first = true;
char ip_buf[INET6_ADDRSTRLEN];
vtep_str[0] = '\0';
for (ALL_LIST_ELEMENTS_RO(es_evi->es_evi_vtep_list, node, evi_vtep)) {
vtep_flag_str[0] = '\0';
if (evi_vtep->flags & BGP_EVPN_EVI_VTEP_EAD_PER_ES)
strlcat(vtep_flag_str, "E", sizeof(vtep_flag_str));
if (evi_vtep->flags & BGP_EVPN_EVI_VTEP_EAD_PER_EVI)
strlcat(vtep_flag_str, "V", sizeof(vtep_flag_str));
if (!strnlen(vtep_flag_str, sizeof(vtep_flag_str)))
strlcpy(vtep_flag_str, "-", sizeof(vtep_flag_str));
if (first)
first = false;
else
strlcat(vtep_str, ",", vtep_str_size);
strlcat(vtep_str,
inet_ntop(AF_INET, &evi_vtep->vtep_ip, ip_buf,
sizeof(ip_buf)),
vtep_str_size);
strlcat(vtep_str, "(", vtep_str_size);
strlcat(vtep_str, vtep_flag_str, vtep_str_size);
strlcat(vtep_str, ")", vtep_str_size);
}
return vtep_str;
}
static void bgp_evpn_es_evi_json_vtep_fill(json_object *json_vteps,
struct bgp_evpn_es_evi_vtep *evi_vtep)
{
json_object *json_vtep_entry;
json_object *json_flags;
json_vtep_entry = json_object_new_object();
json_object_string_addf(json_vtep_entry, "vtep_ip", "%pI4",
&evi_vtep->vtep_ip);
if (evi_vtep->flags & (BGP_EVPN_EVI_VTEP_EAD_PER_ES |
BGP_EVPN_EVI_VTEP_EAD_PER_EVI)) {
json_flags = json_object_new_array();
if (evi_vtep->flags & BGP_EVPN_EVI_VTEP_EAD_PER_ES)
json_array_string_add(json_flags, "ead-per-es");
if (evi_vtep->flags & BGP_EVPN_EVI_VTEP_EAD_PER_EVI)
json_array_string_add(json_flags, "ead-per-evi");
json_object_object_add(json_vtep_entry,
"flags", json_flags);
}
json_object_array_add(json_vteps,
json_vtep_entry);
}
static void bgp_evpn_es_evi_show_entry(struct vty *vty,
struct bgp_evpn_es_evi *es_evi, json_object *json)
{
struct listnode *node;
struct bgp_evpn_es_evi_vtep *evi_vtep;
if (json) {
json_object *json_vteps;
json_object *json_types;
json_object_string_add(json, "esi", es_evi->es->esi_str);
json_object_int_add(json, "vni", es_evi->vpn->vni);
if (es_evi->flags & (BGP_EVPNES_EVI_LOCAL |
BGP_EVPNES_EVI_REMOTE)) {
json_types = json_object_new_array();
if (es_evi->flags & BGP_EVPNES_EVI_LOCAL)
json_array_string_add(json_types, "local");
if (es_evi->flags & BGP_EVPNES_EVI_REMOTE)
json_array_string_add(json_types, "remote");
json_object_object_add(json, "type", json_types);
}
if (listcount(es_evi->es_evi_vtep_list)) {
json_vteps = json_object_new_array();
for (ALL_LIST_ELEMENTS_RO(es_evi->es_evi_vtep_list,
node, evi_vtep)) {
bgp_evpn_es_evi_json_vtep_fill(json_vteps,
evi_vtep);
}
json_object_object_add(json, "vteps", json_vteps);
}
} else {
char type_str[4];
char vtep_str[ES_VTEP_LIST_STR_SZ + BGP_EVPN_VTEPS_FLAG_STR_SZ];
type_str[0] = '\0';
if (es_evi->flags & BGP_EVPNES_EVI_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
if (es_evi->flags & BGP_EVPNES_EVI_REMOTE)
strlcat(type_str, "R", sizeof(type_str));
if (es_evi->flags & BGP_EVPNES_EVI_INCONS_VTEP_LIST)
strlcat(type_str, "I", sizeof(type_str));
bgp_evpn_es_evi_vteps_str(vtep_str, es_evi, sizeof(vtep_str));
vty_out(vty, "%-8d %-30s %-5s %s\n",
es_evi->vpn->vni, es_evi->es->esi_str,
type_str, vtep_str);
}
}
static void bgp_evpn_es_evi_show_entry_detail(struct vty *vty,
struct bgp_evpn_es_evi *es_evi, json_object *json)
{
if (json) {
json_object *json_flags;
/* Add the "brief" info first */
bgp_evpn_es_evi_show_entry(vty, es_evi, json);
if (es_evi->flags & BGP_EVPNES_EVI_INCONS_VTEP_LIST) {
json_flags = json_object_new_array();
json_array_string_add(json_flags, "es-vtep-mismatch");
json_object_object_add(json, "flags", json_flags);
}
} else {
char vtep_str[ES_VTEP_LIST_STR_SZ + BGP_EVPN_VTEPS_FLAG_STR_SZ];
char type_str[4];
type_str[0] = '\0';
if (es_evi->flags & BGP_EVPNES_EVI_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
if (es_evi->flags & BGP_EVPNES_EVI_REMOTE)
strlcat(type_str, "R", sizeof(type_str));
bgp_evpn_es_evi_vteps_str(vtep_str, es_evi, sizeof(vtep_str));
if (!strlen(vtep_str))
strlcpy(vtep_str, "-", sizeof(type_str));
vty_out(vty, "VNI: %d ESI: %s\n",
es_evi->vpn->vni, es_evi->es->esi_str);
vty_out(vty, " Type: %s\n", type_str);
vty_out(vty, " Inconsistencies: %s\n",
(es_evi->flags & BGP_EVPNES_EVI_INCONS_VTEP_LIST) ?
"es-vtep-mismatch":"-");
vty_out(vty, " VTEPs: %s\n", vtep_str);
vty_out(vty, "\n");
}
}
static void bgp_evpn_es_evi_show_one_vni(struct bgpevpn *vpn, struct vty *vty,
json_object *json_array, bool detail)
{
struct bgp_evpn_es_evi *es_evi;
json_object *json = NULL;
RB_FOREACH(es_evi, bgp_es_evi_rb_head, &vpn->es_evi_rb_tree) {
if (json_array)
/* create a separate json object for each ES */
json = json_object_new_object();
if (detail)
bgp_evpn_es_evi_show_entry_detail(vty, es_evi, json);
else
bgp_evpn_es_evi_show_entry(vty, es_evi, json);
/* add ES to the json array */
if (json_array)
json_object_array_add(json_array, json);
}
}
struct es_evi_show_ctx {
struct vty *vty;
json_object *json;
int detail;
};
static void bgp_evpn_es_evi_show_one_vni_hash_cb(struct hash_bucket *bucket,
void *ctxt)
{
struct bgpevpn *vpn = (struct bgpevpn *)bucket->data;
struct es_evi_show_ctx *wctx = (struct es_evi_show_ctx *)ctxt;
bgp_evpn_es_evi_show_one_vni(vpn, wctx->vty, wctx->json, wctx->detail);
}
/* Display all ES EVIs */
void bgp_evpn_es_evi_show(struct vty *vty, bool uj, bool detail)
{
json_object *json_array = NULL;
struct es_evi_show_ctx wctx;
struct bgp *bgp;
if (uj) {
/* create an array of ES-EVIs */
json_array = json_object_new_array();
}
wctx.vty = vty;
wctx.json = json_array;
wctx.detail = detail;
bgp = bgp_get_evpn();
if (!json_array && !detail) {
vty_out(vty, "Flags: L local, R remote, I inconsistent\n");
vty_out(vty, "VTEP-Flags: E EAD-per-ES, V EAD-per-EVI\n");
vty_out(vty, "%-8s %-30s %-5s %s\n",
"VNI", "ESI", "Flags", "VTEPs");
}
if (bgp)
hash_iterate(bgp->vnihash,
(void (*)(struct hash_bucket *,
void *))bgp_evpn_es_evi_show_one_vni_hash_cb,
&wctx);
if (uj)
vty_json(vty, json_array);
}
/* Display specific ES EVI */
void bgp_evpn_es_evi_show_vni(struct vty *vty, vni_t vni,
bool uj, bool detail)
{
struct bgpevpn *vpn = NULL;
json_object *json_array = NULL;
struct bgp *bgp;
if (uj) {
/* create an array of ES-EVIs */
json_array = json_object_new_array();
}
bgp = bgp_get_evpn();
if (bgp)
vpn = bgp_evpn_lookup_vni(bgp, vni);
if (vpn) {
if (!json_array && !detail) {
vty_out(vty, "Flags: L local, R remote, I inconsistent\n");
vty_out(vty, "VTEP-Flags: E EAD-per-ES, V EAD-per-EVI\n");
vty_out(vty, "%-8s %-30s %-5s %s\n",
"VNI", "ESI", "Flags", "VTEPs");
}
bgp_evpn_es_evi_show_one_vni(vpn, vty, json_array, detail);
} else {
if (!uj)
vty_out(vty, "VNI not found\n");
}
if (uj)
vty_json(vty, json_array);
}
/*****************************************************************************
* Ethernet Segment Consistency checks
* Consistency checking is done to detect misconfig or mis-cabling. When
* an inconsistency is detected it is simply logged (and displayed via
* show commands) at this point. A more drastic action can be executed (based
* on user config) in the future.
*/
static void bgp_evpn_es_cons_checks_timer_start(void)
{
if (!bgp_mh_info->consistency_checking || bgp_mh_info->t_cons_check)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("periodic consistency checking started");
thread_add_timer(bm->master, bgp_evpn_run_consistency_checks, NULL,
BGP_EVPN_CONS_CHECK_INTERVAL,
&bgp_mh_info->t_cons_check);
}
/* queue up the es for background consistency checks */
static void bgp_evpn_es_cons_checks_pend_add(struct bgp_evpn_es *es)
{
if (!bgp_mh_info->consistency_checking)
/* consistency checking is not enabled */
return;
if (CHECK_FLAG(es->flags, BGP_EVPNES_CONS_CHECK_PEND))
/* already queued for consistency checking */
return;
/* start the periodic timer for consistency checks if it is not
* already running */
bgp_evpn_es_cons_checks_timer_start();
SET_FLAG(es->flags, BGP_EVPNES_CONS_CHECK_PEND);
listnode_init(&es->pend_es_listnode, es);
listnode_add_after(bgp_mh_info->pend_es_list,
listtail_unchecked(bgp_mh_info->pend_es_list),
&es->pend_es_listnode);
}
/* pull the ES from the consistency check list */
static void bgp_evpn_es_cons_checks_pend_del(struct bgp_evpn_es *es)
{
if (!CHECK_FLAG(es->flags, BGP_EVPNES_CONS_CHECK_PEND))
return;
UNSET_FLAG(es->flags, BGP_EVPNES_CONS_CHECK_PEND);
list_delete_node(bgp_mh_info->pend_es_list,
&es->pend_es_listnode);
}
/* Number of active VTEPs associated with the ES-per-EVI */
static uint32_t bgp_evpn_es_evi_get_active_vtep_cnt(
struct bgp_evpn_es_evi *es_evi)
{
struct bgp_evpn_es_evi_vtep *evi_vtep;
struct listnode *node;
uint32_t vtep_cnt = 0;
for (ALL_LIST_ELEMENTS_RO(es_evi->es_evi_vtep_list, node, evi_vtep)) {
if (CHECK_FLAG(evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE))
++vtep_cnt;
}
return vtep_cnt;
}
/* Number of active VTEPs associated with the ES */
static uint32_t bgp_evpn_es_get_active_vtep_cnt(struct bgp_evpn_es *es)
{
struct listnode *node;
uint32_t vtep_cnt = 0;
struct bgp_evpn_es_vtep *es_vtep;
for (ALL_LIST_ELEMENTS_RO(es->es_vtep_list, node, es_vtep)) {
if (CHECK_FLAG(es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE))
++vtep_cnt;
}
return vtep_cnt;
}
static struct bgp_evpn_es_vtep *bgp_evpn_es_get_next_active_vtep(
struct bgp_evpn_es *es, struct bgp_evpn_es_vtep *es_vtep)
{
struct listnode *node;
struct bgp_evpn_es_vtep *next_es_vtep;
if (es_vtep)
node = listnextnode_unchecked(&es_vtep->es_listnode);
else
node = listhead(es->es_vtep_list);
for (; node; node = listnextnode_unchecked(node)) {
next_es_vtep = listgetdata(node);
if (CHECK_FLAG(next_es_vtep->flags, BGP_EVPNES_VTEP_ACTIVE))
return next_es_vtep;
}
return NULL;
}
static struct bgp_evpn_es_evi_vtep *bgp_evpn_es_evi_get_next_active_vtep(
struct bgp_evpn_es_evi *es_evi,
struct bgp_evpn_es_evi_vtep *evi_vtep)
{
struct listnode *node;
struct bgp_evpn_es_evi_vtep *next_evi_vtep;
if (evi_vtep)
node = listnextnode_unchecked(&evi_vtep->es_evi_listnode);
else
node = listhead(es_evi->es_evi_vtep_list);
for (; node; node = listnextnode_unchecked(node)) {
next_evi_vtep = listgetdata(node);
if (CHECK_FLAG(next_evi_vtep->flags, BGP_EVPN_EVI_VTEP_ACTIVE))
return next_evi_vtep;
}
return NULL;
}
static void bgp_evpn_es_evi_set_inconsistent(struct bgp_evpn_es_evi *es_evi)
{
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_INCONS_VTEP_LIST)) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("inconsistency detected - es %s evi %u vtep list mismatch",
es_evi->es->esi_str,
es_evi->vpn->vni);
SET_FLAG(es_evi->flags, BGP_EVPNES_EVI_INCONS_VTEP_LIST);
/* update parent ES with the incosistency setting */
if (!es_evi->es->incons_evi_vtep_cnt &&
BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("inconsistency detected - es %s vtep list mismatch",
es_evi->es->esi_str);
++es_evi->es->incons_evi_vtep_cnt;
SET_FLAG(es_evi->es->inconsistencies,
BGP_EVPNES_INCONS_VTEP_LIST);
}
}
static uint32_t bgp_evpn_es_run_consistency_checks(struct bgp_evpn_es *es)
{
int proc_cnt = 0;
int es_active_vtep_cnt;
int evi_active_vtep_cnt;
struct bgp_evpn_es_evi *es_evi;
struct listnode *evi_node;
struct bgp_evpn_es_vtep *es_vtep;
struct bgp_evpn_es_evi_vtep *evi_vtep;
/* reset the inconsistencies and re-evaluate */
es->incons_evi_vtep_cnt = 0;
es->inconsistencies = 0;
es_active_vtep_cnt = bgp_evpn_es_get_active_vtep_cnt(es);
for (ALL_LIST_ELEMENTS_RO(es->es_evi_list,
evi_node, es_evi)) {
++proc_cnt;
/* reset the inconsistencies on the EVI and re-evaluate*/
UNSET_FLAG(es_evi->flags, BGP_EVPNES_EVI_INCONS_VTEP_LIST);
evi_active_vtep_cnt =
bgp_evpn_es_evi_get_active_vtep_cnt(es_evi);
if (es_active_vtep_cnt != evi_active_vtep_cnt) {
bgp_evpn_es_evi_set_inconsistent(es_evi);
continue;
}
if (!es_active_vtep_cnt)
continue;
es_vtep = NULL;
evi_vtep = NULL;
while ((es_vtep = bgp_evpn_es_get_next_active_vtep(
es, es_vtep))) {
evi_vtep = bgp_evpn_es_evi_get_next_active_vtep(es_evi,
evi_vtep);
if (!evi_vtep) {
bgp_evpn_es_evi_set_inconsistent(es_evi);
break;
}
if (es_vtep->vtep_ip.s_addr !=
evi_vtep->vtep_ip.s_addr) {
/* inconsistency detected; set it and move
* to the next evi
*/
bgp_evpn_es_evi_set_inconsistent(es_evi);
break;
}
}
}
return proc_cnt;
}
static int bgp_evpn_run_consistency_checks(struct thread *t)
{
int proc_cnt = 0;
int es_cnt = 0;
struct listnode *node;
struct listnode *nextnode;
struct bgp_evpn_es *es;
for (ALL_LIST_ELEMENTS(bgp_mh_info->pend_es_list,
node, nextnode, es)) {
++es_cnt;
++proc_cnt;
/* run consistency checks on the ES and remove it from the
* pending list
*/
proc_cnt += bgp_evpn_es_run_consistency_checks(es);
bgp_evpn_es_cons_checks_pend_del(es);
if (proc_cnt > 500)
break;
}
/* restart the timer */
thread_add_timer(bm->master, bgp_evpn_run_consistency_checks, NULL,
BGP_EVPN_CONS_CHECK_INTERVAL,
&bgp_mh_info->t_cons_check);
return 0;
}
/*****************************************************************************
* EVPN-Nexthop and RMAC management: nexthops associated with Type-2 routes
* that have an ES as destination are consolidated by BGP into a per-VRF
* nh->rmac mapping which is sent to zebra. Zebra installs the nexthop
* as a remote neigh/fdb entry with a dummy (type-1) prefix referencing it.
*
* This handling is needed because Type-2 routes with ES as dest use NHG
* that is setup using EAD routes (i.e. such NHGs do not include the
* RMAC info).
****************************************************************************/
static void bgp_evpn_nh_zebra_update_send(struct bgp_evpn_nh *nh, bool add)
{
struct stream *s;
struct bgp *bgp_vrf = nh->bgp_vrf;
/* Check socket. */
if (!zclient || zclient->sock < 0)
return;
/* Don't try to register if Zebra doesn't know of this instance. */
if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp_vrf)) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("No zebra instance, not %s remote nh %s",
add ? "adding" : "deleting", nh->nh_str);
return;
}
s = zclient->obuf;
stream_reset(s);
zclient_create_header(
s, add ? ZEBRA_EVPN_REMOTE_NH_ADD : ZEBRA_EVPN_REMOTE_NH_DEL,
bgp_vrf->vrf_id);
stream_putl(s, bgp_vrf->vrf_id);
stream_put(s, &nh->ip, sizeof(nh->ip));
if (add)
stream_put(s, &nh->rmac, sizeof(nh->rmac));
stream_putw_at(s, 0, stream_get_endp(s));
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES)) {
if (add)
zlog_debug("evpn vrf %s nh %s rmac %pEA add to zebra",
nh->bgp_vrf->name, nh->nh_str, &nh->rmac);
else if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s del to zebra",
nh->bgp_vrf->name, nh->nh_str);
}
frrtrace(2, frr_bgp, evpn_mh_nh_rmac_zsend, add, nh);
zclient_send_message(zclient);
}
static void bgp_evpn_nh_zebra_update(struct bgp_evpn_nh *nh, bool add)
{
if (add && !is_zero_mac(&nh->rmac)) {
nh->flags |= BGP_EVPN_NH_READY_FOR_ZEBRA;
bgp_evpn_nh_zebra_update_send(nh, true);
} else {
if (!(nh->flags & BGP_EVPN_NH_READY_FOR_ZEBRA))
return;
nh->flags &= ~BGP_EVPN_NH_READY_FOR_ZEBRA;
bgp_evpn_nh_zebra_update_send(nh, false);
}
}
static void *bgp_evpn_nh_alloc(void *p)
{
struct bgp_evpn_nh *tmp_n = p;
struct bgp_evpn_nh *n;
n = XCALLOC(MTYPE_BGP_EVPN_NH, sizeof(struct bgp_evpn_nh));
*n = *tmp_n;
return ((void *)n);
}
static struct bgp_evpn_nh *bgp_evpn_nh_find(struct bgp *bgp_vrf,
struct ipaddr *ip)
{
struct bgp_evpn_nh tmp;
struct bgp_evpn_nh *n;
memset(&tmp, 0, sizeof(tmp));
memcpy(&tmp.ip, ip, sizeof(struct ipaddr));
n = hash_lookup(bgp_vrf->evpn_nh_table, &tmp);
return n;
}
/* Add nexthop entry - implicitly created on first path reference */
static struct bgp_evpn_nh *bgp_evpn_nh_add(struct bgp *bgp_vrf,
struct ipaddr *ip,
struct bgp_path_info *pi)
{
struct bgp_evpn_nh tmp_n;
struct bgp_evpn_nh *n = NULL;
memset(&tmp_n, 0, sizeof(struct bgp_evpn_nh));
memcpy(&tmp_n.ip, ip, sizeof(struct ipaddr));
n = hash_get(bgp_vrf->evpn_nh_table, &tmp_n, bgp_evpn_nh_alloc);
ipaddr2str(ip, n->nh_str, sizeof(n->nh_str));
n->bgp_vrf = bgp_vrf;
n->pi_list = list_new();
listset_app_node_mem(n->pi_list);
/* Setup ref_pi when the nh is created */
if (CHECK_FLAG(pi->flags, BGP_PATH_VALID) && pi->attr) {
n->ref_pi = pi;
memcpy(&n->rmac, &pi->attr->rmac, ETH_ALEN);
}
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s rmac %pEA add", n->bgp_vrf->name,
n->nh_str, &n->rmac);
bgp_evpn_nh_zebra_update(n, true);
return n;
}
/* Delete nexthop entry if there are no paths referencing it */
static void bgp_evpn_nh_del(struct bgp_evpn_nh *n)
{
struct bgp_evpn_nh *tmp_n;
struct bgp *bgp_vrf = n->bgp_vrf;
if (listcount(n->pi_list))
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s del to zebra", bgp_vrf->name,
n->nh_str);
bgp_evpn_nh_zebra_update(n, false);
list_delete(&n->pi_list);
tmp_n = hash_release(bgp_vrf->evpn_nh_table, n);
XFREE(MTYPE_BGP_EVPN_NH, tmp_n);
}
static unsigned int bgp_evpn_nh_hash_keymake(const void *p)
{
const struct bgp_evpn_nh *n = p;
const struct ipaddr *ip = &n->ip;
if (IS_IPADDR_V4(ip))
return jhash_1word(ip->ipaddr_v4.s_addr, 0);
return jhash2(ip->ipaddr_v6.s6_addr32,
array_size(ip->ipaddr_v6.s6_addr32), 0);
}
static bool bgp_evpn_nh_cmp(const void *p1, const void *p2)
{
const struct bgp_evpn_nh *n1 = p1;
const struct bgp_evpn_nh *n2 = p2;
if (n1 == NULL && n2 == NULL)
return true;
if (n1 == NULL || n2 == NULL)
return false;
return (memcmp(&n1->ip, &n2->ip, sizeof(struct ipaddr)) == 0);
}
void bgp_evpn_nh_init(struct bgp *bgp_vrf)
{
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh init", bgp_vrf->name);
bgp_vrf->evpn_nh_table = hash_create(
bgp_evpn_nh_hash_keymake, bgp_evpn_nh_cmp, "BGP EVPN NH table");
}
static void bgp_evpn_nh_flush_entry(struct bgp_evpn_nh *nh)
{
struct listnode *node;
struct listnode *nnode;
struct bgp_path_evpn_nh_info *nh_info;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s flush", nh->bgp_vrf->name,
nh->nh_str);
/* force flush paths */
for (ALL_LIST_ELEMENTS(nh->pi_list, node, nnode, nh_info))
bgp_evpn_path_nh_del(nh->bgp_vrf, nh_info->pi);
}
static void bgp_evpn_nh_flush_cb(struct hash_bucket *bucket, void *ctxt)
{
struct bgp_evpn_nh *nh = (struct bgp_evpn_nh *)bucket->data;
bgp_evpn_nh_flush_entry(nh);
}
void bgp_evpn_nh_finish(struct bgp *bgp_vrf)
{
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh finish", bgp_vrf->name);
hash_iterate(
bgp_vrf->evpn_nh_table,
(void (*)(struct hash_bucket *, void *))bgp_evpn_nh_flush_cb,
NULL);
hash_free(bgp_vrf->evpn_nh_table);
bgp_vrf->evpn_nh_table = NULL;
}
static void bgp_evpn_nh_update_ref_pi(struct bgp_evpn_nh *nh)
{
struct listnode *node;
struct bgp_path_info *pi;
struct bgp_path_evpn_nh_info *nh_info;
if (nh->ref_pi)
return;
for (ALL_LIST_ELEMENTS_RO(nh->pi_list, node, nh_info)) {
pi = nh_info->pi;
if (!CHECK_FLAG(pi->flags, BGP_PATH_VALID) || !pi->attr)
continue;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s ref_pi update",
nh->bgp_vrf->name, nh->nh_str);
nh->ref_pi = pi;
/* If we have a new pi copy rmac from it and update
* zebra if the new rmac is different
*/
if (memcmp(&nh->rmac, &nh->ref_pi->attr->rmac, ETH_ALEN)) {
memcpy(&nh->rmac, &nh->ref_pi->attr->rmac, ETH_ALEN);
bgp_evpn_nh_zebra_update(nh, true);
}
break;
}
}
static void bgp_evpn_nh_clear_ref_pi(struct bgp_evpn_nh *nh,
struct bgp_path_info *pi)
{
if (nh->ref_pi != pi)
return;
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES))
zlog_debug("evpn vrf %s nh %s ref_pi clear", nh->bgp_vrf->name,
nh->nh_str);
nh->ref_pi = NULL;
/* try to find another ref_pi */
bgp_evpn_nh_update_ref_pi(nh);
/* couldn't find one - clear the old rmac and notify zebra */
if (!nh->ref_pi) {
memset(&nh->rmac, 0, ETH_ALEN);
bgp_evpn_nh_zebra_update(nh, true);
}
}
static void bgp_evpn_path_nh_info_free(struct bgp_path_evpn_nh_info *nh_info)
{
bgp_evpn_path_nh_unlink(nh_info);
XFREE(MTYPE_BGP_EVPN_PATH_NH_INFO, nh_info);
}
static struct bgp_path_evpn_nh_info *
bgp_evpn_path_nh_info_new(struct bgp_path_info *pi)
{
struct bgp_path_info_extra *e;
struct bgp_path_mh_info *mh_info;
struct bgp_path_evpn_nh_info *nh_info;
e = bgp_path_info_extra_get(pi);
/* If mh_info doesn't exist allocate it */
mh_info = e->mh_info;
if (!mh_info)
e->mh_info = mh_info = XCALLOC(MTYPE_BGP_EVPN_PATH_MH_INFO,
sizeof(struct bgp_path_mh_info));
/* If nh_info doesn't exist allocate it */
nh_info = mh_info->nh_info;
if (!nh_info) {
mh_info->nh_info = nh_info =
XCALLOC(MTYPE_BGP_EVPN_PATH_NH_INFO,
sizeof(struct bgp_path_evpn_nh_info));
nh_info->pi = pi;
}
return nh_info;
}
static void bgp_evpn_path_nh_unlink(struct bgp_path_evpn_nh_info *nh_info)
{
struct bgp_evpn_nh *nh = nh_info->nh;
struct bgp_path_info *pi;
char prefix_buf[PREFIX_STRLEN];
if (!nh)
return;
pi = nh_info->pi;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("path %s unlinked from nh %s %s",
pi->net ? prefix2str(&pi->net->p, prefix_buf,
sizeof(prefix_buf))
: "",
nh->bgp_vrf->name, nh->nh_str);
list_delete_node(nh->pi_list, &nh_info->nh_listnode);
nh_info->nh = NULL;
/* check if the ref_pi need to be updated */
bgp_evpn_nh_clear_ref_pi(nh, pi);
/* if there are no other references against the nh it
* needs to be freed
*/
bgp_evpn_nh_del(nh);
/* Note we don't free the path nh_info on unlink; it will be freed up
* along with the path.
*/
}
static void bgp_evpn_path_nh_link(struct bgp *bgp_vrf, struct bgp_path_info *pi)
{
struct bgp_path_evpn_nh_info *nh_info;
struct bgp_evpn_nh *nh;
struct ipaddr ip;
/* EVPN nexthop setup in bgp has been turned off */
if (!bgp_mh_info->bgp_evpn_nh_setup)
return;
if (!bgp_vrf->evpn_nh_table) {
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("path %pFX linked to vrf %s failed",
&pi->net->p, bgp_vrf->name);
return;
}
nh_info = (pi->extra && pi->extra->mh_info)
? pi->extra->mh_info->nh_info
: NULL;
/* if NHG is not being used for this path we don't need to manage the
* nexthops in bgp (they are managed by zebra instead)
*/
if (!(pi->attr->es_flags & ATTR_ES_L3_NHG_USE)) {
if (nh_info)
bgp_evpn_path_nh_unlink(nh_info);
return;
}
/* setup nh_info against the path if it doesn't aleady exist */
if (!nh_info)
nh_info = bgp_evpn_path_nh_info_new(pi);
/* find-create nh */
memset(&ip, 0, sizeof(ip));
if (pi->net->p.family == AF_INET6) {
SET_IPADDR_V6(&ip);
memcpy(&ip.ipaddr_v6, &pi->attr->mp_nexthop_global,
sizeof(ip.ipaddr_v6));
} else {
SET_IPADDR_V4(&ip);
memcpy(&ip.ipaddr_v4, &pi->attr->nexthop, sizeof(ip.ipaddr_v4));
}
nh = bgp_evpn_nh_find(bgp_vrf, &ip);
if (!nh)
nh = bgp_evpn_nh_add(bgp_vrf, &ip, pi);
/* dup check */
if (nh_info->nh == nh) {
/* Check if any of the paths are now valid */
bgp_evpn_nh_update_ref_pi(nh);
return;
}
/* unlink old nh if any */
bgp_evpn_path_nh_unlink(nh_info);
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("path %pFX linked to nh %s %s", &pi->net->p,
nh->bgp_vrf->name, nh->nh_str);
/* link mac-ip path to the new nh */
nh_info->nh = nh;
listnode_init(&nh_info->nh_listnode, nh_info);
listnode_add(nh->pi_list, &nh_info->nh_listnode);
/* If a new valid path got linked to the nh see if can get the rmac
* from it
*/
bgp_evpn_nh_update_ref_pi(nh);
if (BGP_DEBUG(evpn_mh, EVPN_MH_ES)) {
if (!nh->ref_pi)
zlog_debug(
"path %pFX linked to nh %s %s with no valid pi",
&pi->net->p, nh->bgp_vrf->name, nh->nh_str);
}
}
void bgp_evpn_path_nh_del(struct bgp *bgp_vrf, struct bgp_path_info *pi)
{
struct bgp_path_evpn_nh_info *nh_info;
nh_info = (pi->extra && pi->extra->mh_info)
? pi->extra->mh_info->nh_info
: NULL;
if (!nh_info)
return;
bgp_evpn_path_nh_unlink(nh_info);
}
void bgp_evpn_path_nh_add(struct bgp *bgp_vrf, struct bgp_path_info *pi)
{
bgp_evpn_path_nh_link(bgp_vrf, pi);
}
static void bgp_evpn_nh_show_entry(struct bgp_evpn_nh *nh, struct vty *vty,
json_object *json_array)
{
json_object *json = NULL;
char mac_buf[ETHER_ADDR_STRLEN];
char prefix_buf[PREFIX_STRLEN];
if (json_array)
/* create a separate json object for each ES */
json = json_object_new_object();
prefix_mac2str(&nh->rmac, mac_buf, sizeof(mac_buf));
if (nh->ref_pi && nh->ref_pi->net)
prefix2str(&nh->ref_pi->net->p, prefix_buf, sizeof(prefix_buf));
else
prefix_buf[0] = '\0';
if (json) {
json_object_string_add(json, "vrf", nh->bgp_vrf->name);
json_object_string_add(json, "ip", nh->nh_str);
json_object_string_add(json, "rmac", mac_buf);
json_object_string_add(json, "basePath", prefix_buf);
json_object_int_add(json, "pathCount", listcount(nh->pi_list));
} else {
vty_out(vty, "%-15s %-15s %-17s %-10d %s\n", nh->bgp_vrf->name,
nh->nh_str, mac_buf, listcount(nh->pi_list),
prefix_buf);
}
/* add ES to the json array */
if (json_array)
json_object_array_add(json_array, json);
}
struct nh_show_ctx {
struct vty *vty;
json_object *json;
};
static void bgp_evpn_nh_show_hash_cb(struct hash_bucket *bucket, void *ctxt)
{
struct bgp_evpn_nh *nh = (struct bgp_evpn_nh *)bucket->data;
struct nh_show_ctx *wctx = (struct nh_show_ctx *)ctxt;
bgp_evpn_nh_show_entry(nh, wctx->vty, wctx->json);
}
/* Display all evpn nexthops */
void bgp_evpn_nh_show(struct vty *vty, bool uj)
{
json_object *json_array = NULL;
struct bgp *bgp_vrf;
struct listnode *node;
struct nh_show_ctx wctx;
if (uj) {
/* create an array of nexthops */
json_array = json_object_new_array();
} else {
vty_out(vty, "%-15s %-15s %-17s %-10s %s\n", "VRF", "IP",
"RMAC", "#Paths", "Base Path");
}
wctx.vty = vty;
wctx.json = json_array;
/* walk through all vrfs */
for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp_vrf)) {
hash_iterate(bgp_vrf->evpn_nh_table,
(void (*)(struct hash_bucket *,
void *))bgp_evpn_nh_show_hash_cb,
&wctx);
}
/* print the array of json-ESs */
if (uj)
vty_json(vty, json_array);
}
/*****************************************************************************/
void bgp_evpn_mh_init(void)
{
bm->mh_info = XCALLOC(MTYPE_BGP_EVPN_MH_INFO, sizeof(*bm->mh_info));
/* setup ES tables */
RB_INIT(bgp_es_rb_head, &bgp_mh_info->es_rb_tree);
/* local ES list */
bgp_mh_info->local_es_list = list_new();
listset_app_node_mem(bgp_mh_info->local_es_list);
/* list of ESs with pending processing */
bgp_mh_info->pend_es_list = list_new();
listset_app_node_mem(bgp_mh_info->pend_es_list);
bgp_mh_info->ead_evi_rx = BGP_EVPN_MH_EAD_EVI_RX_DEF;
bgp_mh_info->ead_evi_tx = BGP_EVPN_MH_EAD_EVI_TX_DEF;
/* config knobs - XXX add cli to control it */
bgp_mh_info->ead_evi_adv_for_down_links = true;
bgp_mh_info->consistency_checking = true;
bgp_mh_info->install_l3nhg = false;
bgp_mh_info->host_routes_use_l3nhg = BGP_EVPN_MH_USE_ES_L3NHG_DEF;
bgp_mh_info->suppress_l3_ecomm_on_inactive_es = true;
bgp_mh_info->bgp_evpn_nh_setup = true;
memset(&zero_esi_buf, 0, sizeof(esi_t));
}
void bgp_evpn_mh_finish(void)
{
struct bgp_evpn_es *es;
struct bgp_evpn_es *es_next;
if (BGP_DEBUG(evpn_mh, EVPN_MH_RT))
zlog_debug("evpn mh finish");
RB_FOREACH_SAFE (es, bgp_es_rb_head, &bgp_mh_info->es_rb_tree,
es_next) {
bgp_evpn_es_local_info_clear(es, true);
}
if (bgp_mh_info->t_cons_check)
thread_cancel(&bgp_mh_info->t_cons_check);
list_delete(&bgp_mh_info->local_es_list);
list_delete(&bgp_mh_info->pend_es_list);
XFREE(MTYPE_BGP_EVPN_MH_INFO, bgp_mh_info);
}
/* This function is called when disable-ead-evi-rx knob flaps */
void bgp_evpn_switch_ead_evi_rx(void)
{
struct bgp *bgp;
struct bgp_evpn_es *es;
struct bgp_evpn_es_evi *es_evi;
struct listnode *evi_node = NULL;
struct listnode *evi_next = NULL;
struct bgp_evpn_es_evi_vtep *vtep;
struct listnode *vtep_node = NULL;
struct listnode *vtep_next = NULL;
bgp = bgp_get_evpn();
if (!bgp)
return;
/*
* Process all the remote es_evi_vteps and reevaluate if the es_evi_vtep
* is active.
*/
RB_FOREACH(es, bgp_es_rb_head, &bgp_mh_info->es_rb_tree) {
if (!CHECK_FLAG(es->flags, BGP_EVPNES_REMOTE))
continue;
for (ALL_LIST_ELEMENTS(es->es_evi_list, evi_node, evi_next,
es_evi)) {
if (!CHECK_FLAG(es_evi->flags, BGP_EVPNES_EVI_REMOTE))
continue;
for (ALL_LIST_ELEMENTS(es_evi->es_evi_vtep_list,
vtep_node, vtep_next, vtep))
bgp_evpn_es_evi_vtep_re_eval_active(bgp, vtep);
}
}
}
Reference in New Issue View Git Blame Copy Permalink