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zebra_evpn_mh.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Zebra EVPN multihoming code
*
* Copyright (C) 2019 Cumulus Networks, Inc.
* Anuradha Karuppiah
*/
#include <zebra.h>
#include "command.h"
#include "hash.h"
#include "if.h"
#include "jhash.h"
#include "linklist.h"
#include "log.h"
#include "memory.h"
#include "prefix.h"
#include "stream.h"
#include "table.h"
#include "vlan.h"
#include "vxlan.h"
#include "zebra/zebra_router.h"
#include "zebra/debug.h"
#include "zebra/interface.h"
#include "zebra/rib.h"
#include "zebra/rt.h"
#include "zebra/rt_netlink.h"
#include "zebra/if_netlink.h"
#include "zebra/zebra_errors.h"
#include "zebra/zebra_l2.h"
#include "zebra/zebra_l2_bridge_if.h"
#include "zebra/zebra_ns.h"
#include "zebra/zebra_vrf.h"
#include "zebra/zebra_vxlan.h"
#include "zebra/zebra_vxlan_private.h"
#include "zebra/zebra_evpn.h"
#include "zebra/zebra_evpn_mac.h"
#include "zebra/zebra_router.h"
#include "zebra/zebra_evpn_mh.h"
#include "zebra/zebra_nhg.h"
DEFINE_MTYPE_STATIC(ZEBRA, ZACC_BD, "Access Broadcast Domain");
DEFINE_MTYPE_STATIC(ZEBRA, ZES, "Ethernet Segment");
DEFINE_MTYPE_STATIC(ZEBRA, ZES_EVI, "ES info per-EVI");
DEFINE_MTYPE_STATIC(ZEBRA, ZMH_INFO, "MH global info");
DEFINE_MTYPE_STATIC(ZEBRA, ZES_VTEP, "VTEP attached to the ES");
DEFINE_MTYPE_STATIC(ZEBRA, L2_NH, "L2 nexthop");
static void zebra_evpn_es_get_one_base_evpn(void);
static int zebra_evpn_es_evi_send_to_client(struct zebra_evpn_es *es,
struct zebra_evpn *zevpn, bool add);
static void zebra_evpn_local_es_del(struct zebra_evpn_es **esp);
static void zebra_evpn_local_es_update(struct zebra_if *zif);
static bool zebra_evpn_es_br_port_dplane_update(struct zebra_evpn_es *es,
const char *caller);
static void zebra_evpn_mh_update_protodown_es(struct zebra_evpn_es *es,
bool resync_dplane);
static void zebra_evpn_mh_clear_protodown_es(struct zebra_evpn_es *es);
static void zebra_evpn_mh_startup_delay_timer_start(const char *rc);
esi_t zero_esi_buf, *zero_esi = &zero_esi_buf;
/*****************************************************************************/
/* Ethernet Segment to EVI association -
* 1. The ES-EVI entry is maintained as a RB tree per L2-VNI
* (struct zebra_evpn.es_evi_rb_tree).
* 2. Each local ES-EVI entry is sent to BGP which advertises it as an
* EAD-EVI (Type-1 EVPN) route
* 3. Local ES-EVI setup is re-evaluated on the following triggers -
* a. When an ESI is set or cleared on an access port.
* b. When an access port associated with an ESI is deleted.
* c. When VLAN member ship changes on an access port.
* d. When a VXLAN_IF is set or cleared on an access broadcast domain.
* e. When a L2-VNI is added or deleted for a VxLAN_IF.
* 4. Currently zebra doesn't remote ES-EVIs. Those are managed and maintained
* entirely in BGP which consolidates them into a remote ES. The remote ES
* is then sent to zebra which allocates a NHG for it.
*/
/* compare ES-IDs for the ES-EVI RB tree maintained per-EVPN */
static int zebra_es_evi_rb_cmp(const struct zebra_evpn_es_evi *es_evi1,
const struct zebra_evpn_es_evi *es_evi2)
{
return memcmp(&es_evi1->es->esi, &es_evi2->es->esi, ESI_BYTES);
}
RB_GENERATE(zebra_es_evi_rb_head, zebra_evpn_es_evi,
rb_node, zebra_es_evi_rb_cmp);
/* allocate a new ES-EVI and insert it into the per-L2-VNI and per-ES
* tables.
*/
static struct zebra_evpn_es_evi *zebra_evpn_es_evi_new(struct zebra_evpn_es *es,
struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi *es_evi;
es_evi = XCALLOC(MTYPE_ZES_EVI, sizeof(struct zebra_evpn_es_evi));
es_evi->es = es;
es_evi->zevpn = zevpn;
/* insert into the EVPN-ESI rb tree */
RB_INSERT(zebra_es_evi_rb_head, &zevpn->es_evi_rb_tree, es_evi);
/* 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);
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("es %s evi %d new",
es_evi->es->esi_str, es_evi->zevpn->vni);
return es_evi;
}
/* Evaluate if the es_evi is ready to be sent BGP -
* 1. If it is ready an add is sent to BGP
* 2. If it is not ready a del is sent (if the ES had been previously added
* to BGP).
*/
static void zebra_evpn_es_evi_re_eval_send_to_client(
struct zebra_evpn_es_evi *es_evi)
{
bool old_ready;
bool new_ready;
old_ready = !!(es_evi->flags & ZEBRA_EVPNES_EVI_READY_FOR_BGP);
/* ES and L2-VNI have to be individually ready for BGP */
if ((es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL) &&
(es_evi->es->flags & ZEBRA_EVPNES_READY_FOR_BGP) &&
zebra_evpn_send_to_client_ok(es_evi->zevpn))
es_evi->flags |= ZEBRA_EVPNES_EVI_READY_FOR_BGP;
else
es_evi->flags &= ~ZEBRA_EVPNES_EVI_READY_FOR_BGP;
new_ready = !!(es_evi->flags & ZEBRA_EVPNES_EVI_READY_FOR_BGP);
if (old_ready == new_ready)
return;
if (new_ready)
zebra_evpn_es_evi_send_to_client(es_evi->es, es_evi->zevpn,
true /* add */);
else
zebra_evpn_es_evi_send_to_client(es_evi->es, es_evi->zevpn,
false /* add */);
}
/* remove the ES-EVI from the per-L2-VNI and per-ES tables and free
* up the memory.
*/
static void zebra_evpn_es_evi_free(struct zebra_evpn_es_evi *es_evi)
{
struct zebra_evpn_es *es = es_evi->es;
struct zebra_evpn *zevpn = es_evi->zevpn;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("es %s evi %d free",
es_evi->es->esi_str, es_evi->zevpn->vni);
/* 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(zebra_es_evi_rb_head, &zevpn->es_evi_rb_tree, es_evi);
/* remove from the VNI-ESI rb tree */
XFREE(MTYPE_ZES_EVI, es_evi);
}
/* find the ES-EVI in the per-L2-VNI RB tree */
struct zebra_evpn_es_evi *zebra_evpn_es_evi_find(struct zebra_evpn_es *es,
struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi es_evi;
es_evi.es = es;
return RB_FIND(zebra_es_evi_rb_head, &zevpn->es_evi_rb_tree, &es_evi);
}
/* Tell BGP about an ES-EVI deletion and then delete it */
static void zebra_evpn_local_es_evi_do_del(struct zebra_evpn_es_evi *es_evi)
{
if (!(es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL))
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("local es %s evi %d del",
es_evi->es->esi_str, es_evi->zevpn->vni);
if (es_evi->flags & ZEBRA_EVPNES_EVI_READY_FOR_BGP) {
/* send a del only if add was sent for it earlier */
zebra_evpn_es_evi_send_to_client(es_evi->es,
es_evi->zevpn, false /* add */);
}
/* delete it from the EVPN's local list */
list_delete_node(es_evi->zevpn->local_es_evi_list,
&es_evi->l2vni_listnode);
es_evi->flags &= ~ZEBRA_EVPNES_EVI_LOCAL;
zebra_evpn_es_evi_free(es_evi);
}
static void zebra_evpn_local_es_evi_del(struct zebra_evpn_es *es,
struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi *es_evi;
es_evi = zebra_evpn_es_evi_find(es, zevpn);
if (es_evi)
zebra_evpn_local_es_evi_do_del(es_evi);
}
/* If there are any existing MAC entries for this es/zevpn we need
* to install it in the dataplane.
*
* Note: primary purpose of this is to handle es del/re-add windows where
* sync MAC entries may be added by bgpd before the es-evi membership is
* created in the dataplane and in zebra
*/
static void zebra_evpn_es_evi_mac_install(struct zebra_evpn_es_evi *es_evi)
{
struct zebra_mac *mac;
struct listnode *node;
struct zebra_evpn_es *es = es_evi->es;
if (listcount(es->mac_list) && IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("dp-mac install on es %s evi %d add", es->esi_str,
es_evi->zevpn->vni);
for (ALL_LIST_ELEMENTS_RO(es->mac_list, node, mac)) {
if (mac->zevpn != es_evi->zevpn)
continue;
if (!CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL))
continue;
zebra_evpn_sync_mac_dp_install(mac, false, false, __func__);
}
}
/* Create an ES-EVI if it doesn't already exist and tell BGP */
static void zebra_evpn_local_es_evi_add(struct zebra_evpn_es *es,
struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi *es_evi;
es_evi = zebra_evpn_es_evi_find(es, zevpn);
if (!es_evi) {
es_evi = zebra_evpn_es_evi_new(es, zevpn);
if (!es_evi)
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("local es %s evi %d add",
es_evi->es->esi_str, es_evi->zevpn->vni);
es_evi->flags |= ZEBRA_EVPNES_EVI_LOCAL;
/* add to the EVPN's local list */
listnode_init(&es_evi->l2vni_listnode, es_evi);
listnode_add(zevpn->local_es_evi_list, &es_evi->l2vni_listnode);
zebra_evpn_es_evi_re_eval_send_to_client(es_evi);
zebra_evpn_es_evi_mac_install(es_evi);
}
}
static void zebra_evpn_es_evi_show_entry(struct vty *vty,
struct zebra_evpn_es_evi *es_evi,
json_object *json_array)
{
char type_str[4];
if (json_array) {
json_object *json;
json_object *json_types;
/* Separate JSON object for each es-evi entry */
json = json_object_new_object();
json_object_string_add(json, "esi", es_evi->es->esi_str);
json_object_int_add(json, "vni", es_evi->zevpn->vni);
if (es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL) {
json_types = json_object_new_array();
if (es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL)
json_array_string_add(json_types, "local");
json_object_object_add(json, "type", json_types);
}
/* Add es-evi entry to json array */
json_object_array_add(json_array, json);
} else {
type_str[0] = '\0';
if (es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
vty_out(vty, "%-8d %-30s %-4s\n",
es_evi->zevpn->vni, es_evi->es->esi_str,
type_str);
}
}
static void
zebra_evpn_es_evi_show_entry_detail(struct vty *vty,
struct zebra_evpn_es_evi *es_evi,
json_object *json_array)
{
char type_str[4];
if (json_array) {
json_object *json;
json_object *json_flags;
/* Separate JSON object for each es-evi entry */
json = json_object_new_object();
json_object_string_add(json, "esi", es_evi->es->esi_str);
json_object_int_add(json, "vni", es_evi->zevpn->vni);
if (es_evi->flags
& (ZEBRA_EVPNES_EVI_LOCAL
| ZEBRA_EVPNES_EVI_READY_FOR_BGP)) {
json_flags = json_object_new_array();
if (es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL)
json_array_string_add(json_flags, "local");
if (es_evi->flags & ZEBRA_EVPNES_EVI_READY_FOR_BGP)
json_array_string_add(json_flags,
"readyForBgp");
json_object_object_add(json, "flags", json_flags);
}
/* Add es-evi entry to json array */
json_object_array_add(json_array, json);
} else {
type_str[0] = '\0';
if (es_evi->flags & ZEBRA_EVPNES_EVI_LOCAL)
strlcat(type_str, "L", sizeof(type_str));
vty_out(vty, "VNI %d ESI: %s\n",
es_evi->zevpn->vni, es_evi->es->esi_str);
vty_out(vty, " Type: %s\n", type_str);
vty_out(vty, " Ready for BGP: %s\n",
(es_evi->flags &
ZEBRA_EVPNES_EVI_READY_FOR_BGP) ?
"yes" : "no");
vty_out(vty, "\n");
}
}
static void zebra_evpn_es_evi_show_one_evpn(struct zebra_evpn *zevpn,
struct vty *vty,
json_object *json_array, int detail)
{
struct zebra_evpn_es_evi *es_evi;
RB_FOREACH(es_evi, zebra_es_evi_rb_head, &zevpn->es_evi_rb_tree) {
if (detail)
zebra_evpn_es_evi_show_entry_detail(vty, es_evi,
json_array);
else
zebra_evpn_es_evi_show_entry(vty, es_evi, json_array);
}
}
struct evpn_mh_show_ctx {
struct vty *vty;
json_object *json;
int detail;
};
static void zebra_evpn_es_evi_show_one_evpn_hash_cb(struct hash_bucket *bucket,
void *ctxt)
{
struct zebra_evpn *zevpn = (struct zebra_evpn *)bucket->data;
struct evpn_mh_show_ctx *wctx = (struct evpn_mh_show_ctx *)ctxt;
zebra_evpn_es_evi_show_one_evpn(zevpn, wctx->vty,
wctx->json, wctx->detail);
}
void zebra_evpn_es_evi_show(struct vty *vty, bool uj, int detail)
{
json_object *json_array = NULL;
struct zebra_vrf *zvrf;
struct evpn_mh_show_ctx wctx;
zvrf = zebra_vrf_get_evpn();
if (uj)
json_array = json_object_new_array();
memset(&wctx, 0, sizeof(wctx));
wctx.vty = vty;
wctx.json = json_array;
wctx.detail = detail;
if (!detail && !json_array) {
vty_out(vty, "Type: L local, R remote\n");
vty_out(vty, "%-8s %-30s %-4s\n", "VNI", "ESI", "Type");
}
/* Display all L2-VNIs */
hash_iterate(zvrf->evpn_table, zebra_evpn_es_evi_show_one_evpn_hash_cb,
&wctx);
if (uj)
vty_json(vty, json_array);
}
void zebra_evpn_es_evi_show_vni(struct vty *vty, bool uj, vni_t vni, int detail)
{
json_object *json_array = NULL;
struct zebra_evpn *zevpn;
zevpn = zebra_evpn_lookup(vni);
if (uj)
json_array = json_object_new_array();
if (zevpn) {
if (!detail && !json_array) {
vty_out(vty, "Type: L local, R remote\n");
vty_out(vty, "%-8s %-30s %-4s\n", "VNI", "ESI", "Type");
}
zebra_evpn_es_evi_show_one_evpn(zevpn, vty, json_array, detail);
} else {
if (!uj)
vty_out(vty, "VNI %d doesn't exist\n", vni);
}
if (uj)
vty_json(vty, json_array);
}
/* Initialize the ES tables maintained per-L2_VNI */
void zebra_evpn_es_evi_init(struct zebra_evpn *zevpn)
{
/* Initialize the ES-EVI RB tree */
RB_INIT(zebra_es_evi_rb_head, &zevpn->es_evi_rb_tree);
/* Initialize the local and remote ES lists maintained for quick
* walks by type
*/
zevpn->local_es_evi_list = list_new();
listset_app_node_mem(zevpn->local_es_evi_list);
}
/* Cleanup the ES info maintained per- EVPN */
void zebra_evpn_es_evi_cleanup(struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi *es_evi;
struct zebra_evpn_es_evi *es_evi_next;
RB_FOREACH_SAFE(es_evi, zebra_es_evi_rb_head,
&zevpn->es_evi_rb_tree, es_evi_next) {
zebra_evpn_local_es_evi_do_del(es_evi);
}
list_delete(&zevpn->local_es_evi_list);
zebra_evpn_es_clear_base_evpn(zevpn);
}
/* called when the oper state or bridge membership changes for the
* vxlan device
*/
void zebra_evpn_update_all_es(struct zebra_evpn *zevpn)
{
struct zebra_evpn_es_evi *es_evi;
struct listnode *node;
struct interface *vlan_if;
struct interface *vxlan_if;
struct zebra_if *vxlan_zif;
struct zebra_vxlan_vni *vni;
/* the EVPN is now elgible as a base for EVPN-MH */
if (zebra_evpn_send_to_client_ok(zevpn))
zebra_evpn_es_set_base_evpn(zevpn);
else
zebra_evpn_es_clear_base_evpn(zevpn);
for (ALL_LIST_ELEMENTS_RO(zevpn->local_es_evi_list, node, es_evi))
zebra_evpn_es_evi_re_eval_send_to_client(es_evi);
/* reinstall SVI MAC */
vxlan_if = zevpn->vxlan_if;
if (vxlan_if) {
vxlan_zif = vxlan_if->info;
if (if_is_operative(vxlan_if)
&& vxlan_zif->brslave_info.br_if) {
vni = zebra_vxlan_if_vni_find(vxlan_zif, zevpn->vni);
/* VLAN-VNI mappings may not exist */
if (vni) {
vlan_if = zvni_map_to_svi(
vni->access_vlan,
vxlan_zif->brslave_info.br_if);
if (vlan_if)
zebra_evpn_acc_bd_svi_mac_add(vlan_if);
}
}
}
}
/*****************************************************************************/
/* Access broadcast domains (BD)
* 1. These broadcast domains can be VLAN aware (in which case
* the key is VID) or VLAN unaware (in which case the key is
* 2. A VID-BD is created when a VLAN is associated with an access port or
* when the VLAN is associated with VXLAN_IF
* 3. A BD is translated into ES-EVI entries when a VNI is associated
* with the broadcast domain
*/
/* Hash key for VLAN based broadcast domains */
static unsigned int zebra_evpn_acc_vl_hash_keymake(const void *p)
{
const struct zebra_evpn_access_bd *acc_bd = p;
return jhash_2words(acc_bd->vid, acc_bd->bridge_ifindex, 0);
}
/* Compare two VLAN based broadcast domains */
static bool zebra_evpn_acc_vl_cmp(const void *p1, const void *p2)
{
const struct zebra_evpn_access_bd *acc_bd1 = p1;
const struct zebra_evpn_access_bd *acc_bd2 = p2;
if (acc_bd1 == NULL && acc_bd2 == NULL)
return true;
if (acc_bd1 == NULL || acc_bd2 == NULL)
return false;
return ((acc_bd1->vid == acc_bd2->vid) &&
(acc_bd1->bridge_ifindex == acc_bd2->bridge_ifindex));
}
/* Lookup VLAN based broadcast domain */
struct zebra_evpn_access_bd *
zebra_evpn_acc_vl_find_index(vlanid_t vid, ifindex_t bridge_ifindex)
{
struct zebra_evpn_access_bd *acc_bd;
struct zebra_evpn_access_bd tmp;
tmp.vid = vid;
tmp.bridge_ifindex = bridge_ifindex;
acc_bd = hash_lookup(zmh_info->evpn_vlan_table, &tmp);
return acc_bd;
}
/* Lookup VLAN based broadcast domain */
struct zebra_evpn_access_bd *zebra_evpn_acc_vl_find(vlanid_t vid,
struct interface *br_if)
{
return zebra_evpn_acc_vl_find_index(vid, br_if->ifindex);
}
/* A new broadcast domain can be created when a VLAN member or VLAN<=>VxLAN_IF
* mapping is added.
*/
static struct zebra_evpn_access_bd *
zebra_evpn_acc_vl_new(vlanid_t vid, struct interface *br_if)
{
struct zebra_evpn_access_bd *acc_bd;
struct interface *vlan_if;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES || IS_ZEBRA_DEBUG_KERNEL)
zlog_debug("%s access vlan %d bridge %s add", __func__, vid,
br_if->name);
acc_bd = XCALLOC(MTYPE_ZACC_BD, sizeof(struct zebra_evpn_access_bd));
acc_bd->vid = vid;
acc_bd->bridge_ifindex = br_if->ifindex;
acc_bd->bridge_zif = (struct zebra_if *)br_if->info;
/* Initialize the mbr list */
acc_bd->mbr_zifs = list_new();
/* Add to hash */
(void)hash_get(zmh_info->evpn_vlan_table, acc_bd, hash_alloc_intern);
/* check if an svi exists for the vlan */
vlan_if = zvni_map_to_svi(vid, br_if);
if (vlan_if) {
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("%s vlan %d bridge %s SVI %s set", __func__,
vid, br_if->name, vlan_if->name);
acc_bd->vlan_zif = vlan_if->info;
}
return acc_bd;
}
/* Free VLAN based broadcast domain -
* This just frees appropriate memory, caller should have taken other
* needed actions.
*/
static void zebra_evpn_acc_vl_free(struct zebra_evpn_access_bd *acc_bd)
{
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access vlan %d del", acc_bd->vid);
if (acc_bd->vlan_zif && acc_bd->zevpn && acc_bd->zevpn->mac_table)
zebra_evpn_mac_svi_del(acc_bd->vlan_zif->ifp, acc_bd->zevpn);
/* cleanup resources maintained against the ES */
list_delete(&acc_bd->mbr_zifs);
/* remove EVI from various tables */
hash_release(zmh_info->evpn_vlan_table, acc_bd);
XFREE(MTYPE_ZACC_BD, acc_bd);
}
static void zebra_evpn_acc_vl_cleanup_all(struct hash_bucket *bucket, void *arg)
{
struct zebra_evpn_access_bd *acc_bd = bucket->data;
zebra_evpn_acc_vl_free(acc_bd);
}
/* called when a bd mbr is removed or VxLAN_IF is diassociated from the access
* VLAN
*/
static void zebra_evpn_acc_bd_free_on_deref(struct zebra_evpn_access_bd *acc_bd)
{
if (!list_isempty(acc_bd->mbr_zifs) || acc_bd->vxlan_zif)
return;
/* Remove this access_bd from bridge hash table */
zebra_l2_bridge_if_vlan_access_bd_deref(acc_bd);
/* if there are no references free the EVI */
zebra_evpn_acc_vl_free(acc_bd);
}
static struct zebra_evpn_access_bd *
zebra_evpn_acc_bd_alloc_on_ref(vlanid_t vid, struct interface *br_if)
{
struct zebra_evpn_access_bd *acc_bd = NULL;
assert(br_if && br_if->info);
acc_bd = zebra_evpn_acc_vl_new(vid, br_if);
if (acc_bd)
/* Add this access_bd to bridge hash table */
zebra_l2_bridge_if_vlan_access_bd_ref(acc_bd);
return acc_bd;
}
/* called when a SVI is goes up/down */
void zebra_evpn_acc_bd_svi_set(struct zebra_if *vlan_zif,
struct zebra_if *br_zif, bool is_up)
{
struct zebra_evpn_access_bd *acc_bd;
uint16_t vid;
struct zebra_if *tmp_br_zif = br_zif;
if (!tmp_br_zif) {
if (!vlan_zif->link || !vlan_zif->link->info)
return;
tmp_br_zif = vlan_zif->link->info;
}
/* ignore vlan unaware bridges */
if (!IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(tmp_br_zif))
return;
vid = vlan_zif->l2info.vl.vid;
acc_bd = zebra_evpn_acc_vl_find(vid, tmp_br_zif->ifp);
if (!acc_bd)
return;
if (is_up) {
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("vlan %d bridge %s SVI %s set", vid,
tmp_br_zif->ifp->name, vlan_zif->ifp->name);
acc_bd->vlan_zif = vlan_zif;
if (acc_bd->zevpn)
zebra_evpn_mac_svi_add(acc_bd->vlan_zif->ifp,
acc_bd->zevpn);
} else if (acc_bd->vlan_zif) {
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("vlan %d bridge %s SVI clear", vid,
tmp_br_zif->ifp->name);
acc_bd->vlan_zif = NULL;
if (acc_bd->zevpn && acc_bd->zevpn->mac_table)
zebra_evpn_mac_svi_del(vlan_zif->ifp, acc_bd->zevpn);
}
}
/* On some events macs are force-flushed. This api can be used to reinstate
* the svi-mac after such cleanup-events.
*/
void zebra_evpn_acc_bd_svi_mac_add(struct interface *vlan_if)
{
zebra_evpn_acc_bd_svi_set(vlan_if->info, NULL,
if_is_operative(vlan_if));
}
/* called when a EVPN-L2VNI is set or cleared against a BD */
static void zebra_evpn_acc_bd_evpn_set(struct zebra_evpn_access_bd *acc_bd,
struct zebra_evpn *zevpn,
struct zebra_evpn *old_zevpn)
{
struct zebra_if *zif;
struct listnode *node;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access vlan %d bridge %s l2-vni %u set",
acc_bd->vid, acc_bd->bridge_zif->ifp->name,
zevpn ? zevpn->vni : 0);
for (ALL_LIST_ELEMENTS_RO(acc_bd->mbr_zifs, node, zif)) {
if (!zif->es_info.es)
continue;
if (zevpn)
zebra_evpn_local_es_evi_add(zif->es_info.es, zevpn);
else if (old_zevpn)
zebra_evpn_local_es_evi_del(zif->es_info.es, old_zevpn);
}
if (acc_bd->vlan_zif) {
if (zevpn)
zebra_evpn_mac_svi_add(acc_bd->vlan_zif->ifp,
acc_bd->zevpn);
else if (old_zevpn && old_zevpn->mac_table)
zebra_evpn_mac_svi_del(acc_bd->vlan_zif->ifp,
old_zevpn);
}
}
/* Lookup API for VxLAN_IF's Bridge, VLAN in EVPN cache */
int zebra_evpn_vl_vxl_bridge_lookup(uint16_t vid, struct zebra_if *vxlan_zif)
{
struct interface *br_if;
struct zebra_evpn_access_bd *acc_bd;
if (!vid)
return -1;
br_if = vxlan_zif->brslave_info.br_if;
if (!br_if)
return -1;
acc_bd = zebra_evpn_acc_vl_find(vid, br_if);
if (!acc_bd)
return 0;
return 1;
}
/* handle VLAN->VxLAN_IF association */
void zebra_evpn_vl_vxl_ref(uint16_t vid, vni_t vni_id,
struct zebra_if *vxlan_zif)
{
vni_t old_vni;
struct zebra_evpn_access_bd *acc_bd;
struct zebra_evpn *old_zevpn;
struct interface *br_if;
if (!vid)
return;
if (!vni_id)
return;
br_if = vxlan_zif->brslave_info.br_if;
if (!br_if)
return;
acc_bd = zebra_evpn_acc_vl_find(vid, br_if);
if (!acc_bd)
acc_bd = zebra_evpn_acc_bd_alloc_on_ref(vid, br_if);
old_vni = acc_bd->vni;
if (vni_id == old_vni)
return;
acc_bd->vni = vni_id;
acc_bd->vxlan_zif = vxlan_zif;
old_zevpn = acc_bd->zevpn;
acc_bd->zevpn = zebra_evpn_lookup(vni_id);
if (acc_bd->zevpn == old_zevpn)
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES || IS_ZEBRA_DEBUG_KERNEL)
zlog_debug("%s bridge %s access vlan %d vni %u ref", __func__,
br_if->name, acc_bd->vid, vni_id);
if (old_zevpn)
zebra_evpn_acc_bd_evpn_set(acc_bd, NULL, old_zevpn);
if (acc_bd->zevpn)
zebra_evpn_acc_bd_evpn_set(acc_bd, acc_bd->zevpn, NULL);
}
/* handle VLAN->VxLAN_IF deref */
void zebra_evpn_vl_vxl_deref(uint16_t vid, vni_t vni_id,
struct zebra_if *vxlan_zif)
{
struct interface *br_if;
struct zebra_evpn_access_bd *acc_bd;
if (!vid)
return;
if (!vni_id)
return;
br_if = vxlan_zif->brslave_info.br_if;
if (!br_if)
return;
acc_bd = zebra_evpn_acc_vl_find(vid, br_if);
if (!acc_bd)
return;
/* clear vxlan_if only if it matches */
if (acc_bd->vni != vni_id)
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access vlan %d bridge %s vni %u deref", acc_bd->vid,
br_if->name, vni_id);
if (acc_bd->zevpn)
zebra_evpn_acc_bd_evpn_set(acc_bd, NULL, acc_bd->zevpn);
acc_bd->zevpn = NULL;
acc_bd->vxlan_zif = NULL;
acc_bd->vni = 0;
/* if there are no other references the access_bd can be freed */
zebra_evpn_acc_bd_free_on_deref(acc_bd);
}
/* handle BridgeIf<->AccessBD cleanup */
void zebra_evpn_access_bd_bridge_cleanup(vlanid_t vid, struct interface *br_if,
struct zebra_evpn_access_bd *acc_bd)
{
struct zebra_evpn *zevpn;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access bd vlan %d bridge %s cleanup", acc_bd->vid,
br_if->name);
zevpn = acc_bd->zevpn;
if (zevpn)
zebra_evpn_acc_bd_evpn_set(acc_bd, NULL, zevpn);
/* cleanup resources maintained against the ES */
list_delete_all_node(acc_bd->mbr_zifs);
acc_bd->zevpn = NULL;
acc_bd->vxlan_zif = NULL;
acc_bd->vni = 0;
acc_bd->bridge_zif = NULL;
/* if there are no other references the access_bd can be freed */
zebra_evpn_acc_bd_free_on_deref(acc_bd);
}
/* handle EVPN add/del */
void zebra_evpn_vxl_evpn_set(struct zebra_if *zif, struct zebra_evpn *zevpn,
bool set)
{
struct zebra_vxlan_vni *vni;
struct zebra_evpn_access_bd *acc_bd;
ifindex_t br_ifindex;
if (!zif)
return;
/* locate access_bd associated with the vxlan device */
vni = zebra_vxlan_if_vni_find(zif, zevpn->vni);
if (!vni)
return;
/* Use the index as the pointer can be stale (deleted) */
br_ifindex = zif->brslave_info.bridge_ifindex;
if (!zif->brslave_info.br_if || br_ifindex == IFINDEX_INTERNAL)
return;
acc_bd = zebra_evpn_acc_vl_find_index(vni->access_vlan, br_ifindex);
if (!acc_bd)
return;
if (set) {
zebra_evpn_es_set_base_evpn(zevpn);
if (acc_bd->zevpn != zevpn) {
acc_bd->zevpn = zevpn;
zebra_evpn_acc_bd_evpn_set(acc_bd, zevpn, NULL);
}
} else {
if (acc_bd->zevpn) {
struct zebra_evpn *old_zevpn = acc_bd->zevpn;
acc_bd->zevpn = NULL;
zebra_evpn_acc_bd_evpn_set(acc_bd, NULL, old_zevpn);
}
}
}
/* handle addition of new VLAN members */
void zebra_evpn_vl_mbr_ref(uint16_t vid, struct zebra_if *zif)
{
struct interface *br_if;
struct zebra_evpn_access_bd *acc_bd;
if (!vid)
return;
br_if = zif->brslave_info.br_if;
if (!br_if)
return;
acc_bd = zebra_evpn_acc_vl_find(vid, br_if);
if (!acc_bd)
acc_bd = zebra_evpn_acc_bd_alloc_on_ref(vid, br_if);
if (listnode_lookup(acc_bd->mbr_zifs, zif))
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access vlan %d bridge %s mbr %s ref", vid,
br_if->name, zif->ifp->name);
listnode_add(acc_bd->mbr_zifs, zif);
if (acc_bd->zevpn && zif->es_info.es)
zebra_evpn_local_es_evi_add(zif->es_info.es, acc_bd->zevpn);
}
/* handle deletion of VLAN members */
void zebra_evpn_vl_mbr_deref(uint16_t vid, struct zebra_if *zif)
{
struct interface *br_if;
struct zebra_evpn_access_bd *acc_bd;
struct listnode *node;
if (!vid)
return;
br_if = zif->brslave_info.br_if;
if (!br_if)
return;
acc_bd = zebra_evpn_acc_vl_find(vid, br_if);
if (!acc_bd)
return;
node = listnode_lookup(acc_bd->mbr_zifs, zif);
if (!node)
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_ES)
zlog_debug("access vlan %d bridge %s mbr %s deref", vid,
br_if->name, zif->ifp->name);
list_delete_node(acc_bd->mbr_zifs, node);
if (acc_bd->zevpn && zif->es_info.es)
zebra_evpn_local_es_evi_del(zif->es_info.es, acc_bd->zevpn);
/* if there are no other references the access_bd can be freed */
zebra_evpn_acc_bd_free_on_deref(acc_bd);
}
static void zebra_evpn_acc_vl_adv_svi_mac_cb(struct hash_bucket *bucket,
void *ctxt)
{
struct zebra_evpn_access_bd *acc_bd = bucket->data;
if (acc_bd->vlan_zif && acc_bd->zevpn)
zebra_evpn_mac_svi_add(acc_bd->vlan_zif->ifp, acc_bd->zevpn);
}
/* called when advertise SVI MAC is enabled on the switch */
static void zebra_evpn_acc_vl_adv_svi_mac_all(void)
{
hash_iterate(zmh_info->evpn_vlan_table,
zebra_evpn_acc_vl_adv_svi_mac_cb, NULL);
}
static void zebra_evpn_acc_vl_json_fill(struct zebra_evpn_access_bd *acc_bd,
json_object *json, bool detail)
{
json_object_int_add(json, "vlan", acc_bd->vid);
if (acc_bd->vxlan_zif)
json_object_string_add(json, "vxlanIf",
acc_bd->vxlan_zif->ifp->name);
if (acc_bd->zevpn)
json_object_int_add(json, "vni", acc_bd->zevpn->vni);