// SPDX-License-Identifier: GPL-2.0-or-later /* EVPN header for multihoming procedures * * Copyright (C) 2019 Cumulus Networks * Anuradha Karuppiah * */ #ifndef _FRR_BGP_EVPN_MH_H #define _FRR_BGP_EVPN_MH_H #include "vxlan.h" #include "bgpd.h" #include "bgp_evpn.h" #include "bgp_evpn_private.h" #define BGP_EVPN_AD_ES_ETH_TAG 0xffffffff #define BGP_EVPN_AD_EVI_ETH_TAG 0 #define BGP_EVPNES_INCONS_STR_SZ 80 #define BGP_EVPN_VTEPS_FLAG_STR_SZ (BGP_EVPN_FLAG_STR_SZ * ES_VTEP_MAX_CNT) #define BGP_EVPN_CONS_CHECK_INTERVAL 60 #define BGP_EVPN_MH_USE_ES_L3NHG_DEF true /* XXX - tune this */ #define BGP_EVPN_MAX_EVI_PER_ES_FRAG 128 /* An ES can result in multiple EAD-per-ES route. Each EAD fragment is * associated with an unique RD */ struct bgp_evpn_es_frag { /* frag is associated with a parent ES */ struct bgp_evpn_es *es; /* Id for deriving the RD automatically for this ES fragment */ uint16_t rd_id; /* RD for this ES fragment */ struct prefix_rd prd; /* Memory used for linking bgp_evpn_es_frag to * bgp_evpn_es->es_frag_list */ struct listnode es_listnode; /* List of ES-EVIs associated with this fragment */ struct list *es_evi_frag_list; }; /* Ethernet Segment entry - * - Local and remote ESs are maintained in a global RB tree, * bgp_mh_info->es_rb_tree using ESI as key * - Local ESs are received from zebra (BGP_EVPNES_LOCAL) * - Remotes ESs are implicitly created (by reference) by a remote ES-EVI * (BGP_EVPNES_REMOTE) * - An ES can be simultaneously LOCAL and REMOTE; infact all LOCAL ESs are * expected to have REMOTE ES peers. */ struct bgp_evpn_es { /* Ethernet Segment Identifier */ esi_t esi; char esi_str[ESI_STR_LEN]; /* es flags */ uint32_t flags; /* created via zebra config */ #define BGP_EVPNES_LOCAL (1 << 0) /* created implicitly by a remote ES-EVI reference */ #define BGP_EVPNES_REMOTE (1 << 1) /* local ES link is oper-up */ #define BGP_EVPNES_OPER_UP (1 << 2) /* enable generation of EAD-EVI routes */ #define BGP_EVPNES_ADV_EVI (1 << 3) /* consistency checks pending */ #define BGP_EVPNES_CONS_CHECK_PEND (1 << 4) /* ES is in LACP bypass mode - don't advertise EAD-ES or ESR */ #define BGP_EVPNES_BYPASS (1 << 5) /* bits needed for printing the flags + null */ #define BGP_EVPN_FLAG_STR_SZ 7 /* memory used for adding the es to bgp->es_rb_tree */ RB_ENTRY(bgp_evpn_es) rb_node; /* [EVPNES_LOCAL] memory used for linking the es to * bgp_mh_info->local_es_list */ struct listnode es_listnode; /* memory used for linking the es to "processing" pending list * bgp_mh_info->pend_es_list */ struct listnode pend_es_listnode; /* [EVPNES_LOCAL] List of RDs for this ES (bgp_evpn_es_frag) */ struct list *es_frag_list; struct bgp_evpn_es_frag *es_base_frag; /* [EVPNES_LOCAL] originator ip address */ struct in_addr originator_ip; /* [EVPNES_LOCAL] Route table for EVPN routes for this ESI- * - Type-4 local and remote routes * - Type-1 local routes */ struct bgp_table *route_table; /* list of PEs (bgp_evpn_es_vtep) attached to the ES */ struct list *es_vtep_list; /* List of ES-EVIs associated with this ES */ struct list *es_evi_list; /* List of ES-VRFs associated with this ES */ struct list *es_vrf_list; /* List of MAC-IP VNI paths using this ES as destination - * element is bgp_path_info_extra->es_info * Note: Only local/zebra-added MACIP paths in the VNI * routing table are linked to this list */ struct list *macip_evi_path_list; /* List of MAC-IP paths in the global routing table using this * ES as destination - data is bgp_path_info_extra->es_info * Note: Only non-local/imported MACIP paths in the global * routing table are linked to this list */ struct list *macip_global_path_list; /* Number of remote VNIs referencing this ES */ uint32_t remote_es_evi_cnt; uint32_t inconsistencies; /* there are one or more EVIs whose VTEP list doesn't match * with the ES's VTEP list */ #define BGP_EVPNES_INCONS_VTEP_LIST (1 << 0) /* number of es-evi entries whose VTEP list doesn't match * with the ES's */ uint32_t incons_evi_vtep_cnt; /* preference config for BUM-DF election. advertised via the ESR. */ uint16_t df_pref; QOBJ_FIELDS; }; DECLARE_QOBJ_TYPE(bgp_evpn_es); RB_HEAD(bgp_es_rb_head, bgp_evpn_es); RB_PROTOTYPE(bgp_es_rb_head, bgp_evpn_es, rb_node, bgp_es_rb_cmp); /* PE attached to an ES */ struct bgp_evpn_es_vtep { struct bgp_evpn_es *es; /* parent ES */ struct in_addr vtep_ip; char vtep_str[INET6_ADDRSTRLEN]; uint32_t flags; /* Rxed a Type4 route from this PE */ #define BGP_EVPNES_VTEP_ESR (1 << 0) /* Active (rxed EAD-ES and EAD-EVI) and can be included as * a nexthop */ #define BGP_EVPNES_VTEP_ACTIVE (1 << 1) uint32_t evi_cnt; /* es_evis referencing this vtep as an active path */ /* Algorithm and preference for DF election. Rxed via the ESR */ uint8_t df_alg; uint16_t df_pref; /* memory used for adding the entry to es->es_vtep_list */ struct listnode es_listnode; }; /* ES-VRF element needed for managing L3 NHGs. It is implicitly created * when an ES-EVI is associated with a tenant VRF */ struct bgp_evpn_es_vrf { struct bgp_evpn_es *es; struct bgp *bgp_vrf; uint32_t flags; /* NHG can only be activated if there are active VTEPs in the ES and * there is a valid L3-VNI associated with the VRF */ #define BGP_EVPNES_VRF_NHG_ACTIVE (1 << 0) /* memory used for adding the es_vrf to * es_vrf->bgp_vrf->es_vrf_rb_tree */ RB_ENTRY(bgp_evpn_es_vrf) rb_node; /* memory used for linking the es_vrf to es_vrf->es->es_vrf_list */ struct listnode es_listnode; uint32_t nhg_id; uint32_t v6_nhg_id; /* Number of ES-EVI entries associated with this ES-VRF */ uint32_t ref_cnt; }; /* ES per-EVI info * - ES-EVIs are maintained per-L2-VNI (vpn->es_evi_rb_tree) * - ES-EVIs are also linked to the parent ES (es->es_evi_list) * - Local ES-EVIs are created by zebra (via config). They are linked to a * per-VNI list (vpn->local_es_evi_list) for quick access * - Remote ES-EVIs are created implicitly when a bgp_evpn_es_evi_vtep * references it. */ struct bgp_evpn_es_evi { struct bgp_evpn_es *es; /* Only applicableif EVI_LOCAL */ struct bgp_evpn_es_frag *es_frag; struct bgpevpn *vpn; /* ES-EVI flags */ uint32_t flags; /* local ES-EVI, created by zebra */ #define BGP_EVPNES_EVI_LOCAL (1 << 0) /* created via a remote VTEP imported by BGP */ #define BGP_EVPNES_EVI_REMOTE (1 << 1) #define BGP_EVPNES_EVI_INCONS_VTEP_LIST (1 << 2) /* memory used for adding the es_evi to es_evi->vpn->es_evi_rb_tree */ RB_ENTRY(bgp_evpn_es_evi) rb_node; /* memory used for linking the es_evi to * es_evi->vpn->local_es_evi_list */ struct listnode l2vni_listnode; /* memory used for linking the es_evi to * es_evi->es->es_evi_list */ struct listnode es_listnode; /* memory used for linking the es_evi to * es_evi->es_frag->es_evi_frag_list */ struct listnode es_frag_listnode; /* list of PEs (bgp_evpn_es_evi_vtep) attached to the ES for this VNI */ struct list *es_evi_vtep_list; struct bgp_evpn_es_vrf *es_vrf; }; /* PE attached to an ES for a VNI. This entry is created when an EAD-per-ES * or EAD-per-EVI Type1 route is imported into the VNI. */ struct bgp_evpn_es_evi_vtep { struct bgp_evpn_es_evi *es_evi; /* parent ES-EVI */ struct in_addr vtep_ip; uint32_t flags; /* Rxed an EAD-per-ES route from the PE */ #define BGP_EVPN_EVI_VTEP_EAD_PER_ES (1 << 0) /* rxed EAD-per-ES */ /* Rxed an EAD-per-EVI route from the PE */ #define BGP_EVPN_EVI_VTEP_EAD_PER_EVI (1 << 1) /* rxed EAD-per-EVI */ /* VTEP is active i.e. will result in the creation of an es-vtep */ #define BGP_EVPN_EVI_VTEP_ACTIVE (1 << 2) #define BGP_EVPN_EVI_VTEP_EAD (BGP_EVPN_EVI_VTEP_EAD_PER_ES |\ BGP_EVPN_EVI_VTEP_EAD_PER_EVI) /* memory used for adding the entry to es_evi->es_evi_vtep_list */ struct listnode es_evi_listnode; struct bgp_evpn_es_vtep *es_vtep; }; /* A nexthop is created when a path (imported from an EVPN type-2 route) * is added to the VRF route table using that nexthop. * It is added on first pi reference and removed on last pi deref. */ struct bgp_evpn_nh { /* backpointer to the VRF */ struct bgp *bgp_vrf; /* nexthop/VTEP IP */ struct ipaddr ip; /* description for easy logging */ char nh_str[INET6_ADDRSTRLEN]; struct ethaddr rmac; /* pi from which we are pulling the nh RMAC */ struct bgp_path_info *ref_pi; /* List of VRF paths using this nexthop */ struct list *pi_list; uint8_t flags; #define BGP_EVPN_NH_READY_FOR_ZEBRA (1 << 0) }; /* multihoming information stored in bgp_master */ #define bgp_mh_info (bm->mh_info) struct bgp_evpn_mh_info { /* RB tree of Ethernet segments (used for EVPN-MH) */ struct bgp_es_rb_head es_rb_tree; /* List of local ESs */ struct list *local_es_list; /* List of ESs with pending/periodic processing */ struct list *pend_es_list; /* periodic timer for running background consistency checks */ struct event *t_cons_check; /* config knobs for optimizing or interop */ /* Generate EAD-EVI routes even if the ES is oper-down. This can be * enabled as an optimization to avoid a storm of updates when an ES * link flaps. */ bool ead_evi_adv_for_down_links; /* Enable ES consistency checking */ bool consistency_checking; /* Use L3 NHGs for host routes in symmetric IRB */ bool host_routes_use_l3nhg; /* Some vendors are not generating the EAD-per-EVI route. This knob * can be turned off to activate a remote ES-PE when the EAD-per-ES * route is rxed i.e. not wait on the EAD-per-EVI route */ bool ead_evi_rx; #define BGP_EVPN_MH_EAD_EVI_RX_DEF true /* Skip EAD-EVI advertisements by turning off this knob */ bool ead_evi_tx; #define BGP_EVPN_MH_EAD_EVI_TX_DEF true /* If the Local ES is inactive we advertise the MAC-IP without the * L3 ecomm */ bool suppress_l3_ecomm_on_inactive_es; /* Setup EVPN PE nexthops and their RMAC in bgpd */ bool bgp_evpn_nh_setup; /* If global export-rts are configured that is used for sending * sending the ead-per-es route instead of the L2-VNI(s) RTs */ struct list *ead_es_export_rtl; /* Number of EVIs in an ES fragment - used of EAD-per-ES route * construction */ uint32_t evi_per_es_frag; }; /****************************************************************************/ static inline int bgp_evpn_is_es_local(struct bgp_evpn_es *es) { return CHECK_FLAG(es->flags, BGP_EVPNES_LOCAL) ? 1 : 0; } extern esi_t *zero_esi; static inline bool bgp_evpn_is_esi_valid(esi_t *esi) { return !!memcmp(esi, zero_esi, sizeof(esi_t)); } static inline esi_t *bgp_evpn_attr_get_esi(struct attr *attr) { return attr ? &attr->esi : zero_esi; } static inline bool bgp_evpn_attr_is_sync(struct attr *attr) { return attr ? !!(attr->es_flags & (ATTR_ES_PEER_PROXY | ATTR_ES_PEER_ACTIVE)) : false; } static inline uint32_t bgp_evpn_attr_get_sync_seq(struct attr *attr) { return attr ? attr->mm_sync_seqnum : 0; } static inline bool bgp_evpn_attr_is_active_on_peer(struct attr *attr) { return attr ? !!(attr->es_flags & ATTR_ES_PEER_ACTIVE) : false; } static inline bool bgp_evpn_attr_is_router_on_peer(struct attr *attr) { return attr ? !!(attr->es_flags & ATTR_ES_PEER_ROUTER) : false; } static inline bool bgp_evpn_attr_is_proxy(struct attr *attr) { return attr ? !!(attr->es_flags & ATTR_ES_PROXY_ADVERT) : false; } static inline bool bgp_evpn_attr_is_local_es(struct attr *attr) { return attr ? !!(attr->es_flags & ATTR_ES_IS_LOCAL) : false; } static inline bool bgp_evpn_local_es_is_active(struct bgp_evpn_es *es) { return (es->flags & BGP_EVPNES_OPER_UP) && !(es->flags & BGP_EVPNES_BYPASS); } /****************************************************************************/ extern 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); extern void update_type1_routes_for_evi(struct bgp *bgp, struct bgpevpn *vpn); extern int delete_global_ead_evi_routes(struct bgp *bgp, struct bgpevpn *vpn); extern 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, struct bgp_path_info **ri, int *route_changed); 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 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); extern 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); extern int bgp_evpn_local_es_del(struct bgp *bgp, esi_t *esi); extern int bgp_evpn_local_es_evi_add(struct bgp *bgp, esi_t *esi, vni_t vni); extern int bgp_evpn_local_es_evi_del(struct bgp *bgp, esi_t *esi, vni_t vni); extern int bgp_evpn_remote_es_evi_add(struct bgp *bgp, struct bgpevpn *vpn, const struct prefix_evpn *p); extern int bgp_evpn_remote_es_evi_del(struct bgp *bgp, struct bgpevpn *vpn, const struct prefix_evpn *p); extern void bgp_evpn_mh_init(void); extern void bgp_evpn_mh_finish(void); void bgp_evpn_vni_es_init(struct bgpevpn *vpn); void bgp_evpn_vni_es_cleanup(struct bgpevpn *vpn); void bgp_evpn_es_show_esi(struct vty *vty, esi_t *esi, bool uj); void bgp_evpn_es_show(struct vty *vty, bool uj, bool detail); void bgp_evpn_es_evi_show_vni(struct vty *vty, vni_t vni, bool uj, bool detail); void bgp_evpn_es_evi_show(struct vty *vty, bool uj, bool detail); struct bgp_evpn_es *bgp_evpn_es_find(const esi_t *esi); extern void bgp_evpn_vrf_es_init(struct bgp *bgp_vrf); extern bool bgp_evpn_is_esi_local_and_non_bypass(esi_t *esi); extern void bgp_evpn_es_vrf_deref(struct bgp_evpn_es_evi *es_evi); extern void bgp_evpn_es_vrf_ref(struct bgp_evpn_es_evi *es_evi, struct bgp *bgp_vrf); extern void bgp_evpn_path_mh_info_free(struct bgp_path_mh_info *mh_info); extern void bgp_evpn_path_es_link(struct bgp_path_info *pi, vni_t vni, esi_t *esi); extern bool bgp_evpn_path_es_use_nhg(struct bgp *bgp_vrf, struct bgp_path_info *pi, uint32_t *nhg_p); extern void bgp_evpn_es_vrf_show(struct vty *vty, bool uj, struct bgp_evpn_es *es); extern void bgp_evpn_es_vrf_show_esi(struct vty *vty, esi_t *esi, bool uj); extern void bgp_evpn_switch_ead_evi_rx(void); extern bool bgp_evpn_es_add_l3_ecomm_ok(esi_t *esi); extern 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); extern void bgp_evpn_nh_init(struct bgp *bgp_vrf); extern void bgp_evpn_nh_finish(struct bgp *bgp_vrf); extern void bgp_evpn_nh_show(struct vty *vty, bool uj); extern void bgp_evpn_path_nh_add(struct bgp *bgp_vrf, struct bgp_path_info *pi); extern void bgp_evpn_path_nh_del(struct bgp *bgp_vrf, struct bgp_path_info *pi); extern void bgp_evpn_mh_config_ead_export_rt(struct bgp *bgp, struct ecommunity *ecom, bool del); #endif /* _FRR_BGP_EVPN_MH_H */