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Diffstat (limited to 'zebra/zebra_evpn_mh.h')
| -rw-r--r-- | zebra/zebra_evpn_mh.h | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/zebra/zebra_evpn_mh.h b/zebra/zebra_evpn_mh.h new file mode 100644 index 0000000..0376483 --- /dev/null +++ b/zebra/zebra_evpn_mh.h @@ -0,0 +1,382 @@ +/* + * Zebra EVPN MH Data structures and definitions + * + * Copyright (C) 2019 Cumulus Networks, Inc. + * Anuradha Karuppiah + * + * This file is part of FRR. + * + * FRR 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. + * + * FRR 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. + */ + +#ifndef _ZEBRA_EVPN_MH_H +#define _ZEBRA_EVPN_MH_H + +#include <zebra.h> + +#include "if.h" +#include "linklist.h" +#include "bitfield.h" +#include "zebra_vxlan.h" +#include "zebra_vxlan_private.h" +#include "zebra_nhg.h" + +#define EVPN_MH_VTY_STR "Multihoming\n" + +/* Ethernet Segment entry - + * - Local and remote ESs are maintained in a global RB tree, + * zmh_info->es_rb_tree using ESI as key + * - Local ESs are added via zebra config (ZEBRA_EVPNES_LOCAL) when an + * access port is associated with an ES-ID + * - Remotes ESs are added by BGP based on received/remote EAD/Type-1 routes + * (ZEBRA_EVPNES_REMOTE) + * - An ES can be simultaneously LOCAL and REMOTE; infact all LOCAL ESs are + * expected to have REMOTE ES peers. + */ +struct zebra_evpn_es { + esi_t esi; + char esi_str[ESI_STR_LEN]; + + /* ES flags */ + uint32_t flags; +#define ZEBRA_EVPNES_LOCAL (1 << 0) /* configured in zebra */ +#define ZEBRA_EVPNES_REMOTE (1 << 1) /* added by bgp */ +#define ZEBRA_EVPNES_OPER_UP (1 << 2) /* es->ifp is oper-up */ +#define ZEBRA_EVPNES_READY_FOR_BGP (1 << 3) /* ready to be sent to BGP */ +#define ZEBRA_EVPNES_NHG_ACTIVE (1 << 4) /* NHG has been installed */ +/* This flag is only applicable to local ESs and signifies that this + * VTEP is not the DF + */ +#define ZEBRA_EVPNES_NON_DF (1 << 5) +/* When the ES becomes a bridge port we need to activate the BUM non-DF + * filter, SPH filter and backup NHG for fast-failover + */ +#define ZEBRA_EVPNES_BR_PORT (1 << 6) +/* ES is in bypass mode i.e. must not be advertised. ES-bypass is set + * when the associated host bond goes into LACP bypass + */ +#define ZEBRA_EVPNES_BYPASS (1 << 7) + + /* memory used for adding the es to zmh_info->es_rb_tree */ + RB_ENTRY(zebra_evpn_es) rb_node; + + /* [EVPNES_LOCAL] memory used for linking the es to + * zmh_info->local_es_list + */ + struct listnode local_es_listnode; + + /* [EVPNES_LOCAL] corresponding interface */ + struct zebra_if *zif; + + /* list of ES-EVIs associated with the ES */ + struct list *es_evi_list; + + /* [!EVPNES_LOCAL] List of remote VTEPs (zebra_evpn_es_vtep) */ + struct list *es_vtep_list; + + /* list of zebra_mac entries using this ES as destination */ + struct list *mac_list; + + /* Nexthop group id */ + uint32_t nhg_id; + + /* Preference config for BUM-DF election. Sent to BGP and + * advertised via the ESR + */ + uint16_t df_pref; + + /* When a new ES is configured it is held in a non-DF state + * for 3 seconds. This allows the peer Type-4 routes to be + * imported before running the DF election. + */ +#define ZEBRA_EVPN_MH_DF_DELAY_TIME 3 /* seconds */ + struct thread *df_delay_timer; +}; +RB_HEAD(zebra_es_rb_head, zebra_evpn_es); +RB_PROTOTYPE(zebra_es_rb_head, zebra_evpn_es, rb_node, zebra_es_rb_cmp); + +/* ES per-EVI info + * - ES-EVIs are maintained per-EVPN (vni->es_evi_rb_tree) + * - Local ES-EVIs are linked to per-EVPN list for quick access + * - Although some infrastucture is present for remote ES-EVIs, currently + * BGP does NOT send remote ES-EVIs to zebra. This may change in the + * future (but must be changed thoughtfully and only if needed as ES-EVI + * can get prolific and come in the way of rapid failovers) + */ +struct zebra_evpn_es_evi { + struct zebra_evpn_es *es; + struct zebra_evpn *zevpn; + + /* ES-EVI flags */ + uint32_t flags; + /* local ES-EVI */ +#define ZEBRA_EVPNES_EVI_LOCAL (1 << 0) /* created by zebra */ +#define ZEBRA_EVPNES_EVI_READY_FOR_BGP (1 << 1) /* ready to be sent to BGP */ + + /* memory used for adding the es_evi to + * es_evi->zevpn->es_evi_rb_tree + */ + RB_ENTRY(zebra_evpn_es_evi) rb_node; + /* memory used for linking the es_evi to + * es_evi->zevpn->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; +}; + +/* A single L2 nexthop is allocated across all ESs with the same PE/VTEP + * nexthop + */ +struct zebra_evpn_l2_nh { + struct in_addr vtep_ip; + + /* MAC nexthop id */ + uint32_t nh_id; + + /* es_vtep entries using this nexthop */ + uint32_t ref_cnt; +}; + +/* PE attached to an ES */ +struct zebra_evpn_es_vtep { + struct zebra_evpn_es *es; /* parent ES */ + struct in_addr vtep_ip; + + uint32_t flags; + /* Rxed Type-4 route from this VTEP */ +#define ZEBRA_EVPNES_VTEP_RXED_ESR (1 << 0) +#define ZEBRA_EVPNES_VTEP_DEL_IN_PROG (1 << 1) + + /* MAC nexthop info */ + struct zebra_evpn_l2_nh *nh; + + /* memory used for adding the entry to es->es_vtep_list */ + struct listnode es_listnode; + + /* Parameters for DF election */ + uint8_t df_alg; + uint32_t df_pref; + + /* XXX - maintain a backpointer to struct zebra_vtep */ +}; + +/* Local/access-side broadcast domain - zebra_evpn_access_bd is added to - + * zrouter->evpn_vlan_table (for VLAN aware bridges) OR + * zrouter->evpn_bridge_table (for VLAN unaware bridges) + * XXX - support for VLAN unaware bridges is yet to be flushed out + */ +struct zebra_evpn_access_bd { + vlanid_t vid; + + struct zebra_if *vxlan_zif; /* vxlan device */ + /* list of members associated with the BD i.e. (potential) ESs */ + struct list *mbr_zifs; + /* presence of zevpn activates the EVI on all the ESs in mbr_zifs */ + struct zebra_evpn *zevpn; + /* SVI associated with the VLAN */ + struct zebra_if *vlan_zif; +}; + +/* multihoming information stored in zrouter */ +#define zmh_info (zrouter.mh_info) +struct zebra_evpn_mh_info { + uint32_t flags; +/* If the dataplane is not capable of handling a backup NHG on an access + * port we will need to explicitly failover each MAC entry on + * local ES down + */ +#define ZEBRA_EVPN_MH_REDIRECT_OFF (1 << 0) +/* DAD support for EVPN-MH is yet to be added. So on detection of + * first local ES, DAD is turned off + */ +#define ZEBRA_EVPN_MH_DUP_ADDR_DETECT_OFF (1 << 1) +/* If EVPN MH is enabled we only advertise REACHABLE neigh entries as Type-2 + * routes. As there is no global config knob for enabling EVPN MH we turn + * this flag when the first local ES is detected. + */ +#define ZEBRA_EVPN_MH_ADV_REACHABLE_NEIGH_ONLY (1 << 2) +/* If EVPN MH is enabled we advertise the SVI MAC address to avoid + * flooding of ARP replies rxed from the multi-homed host + */ +#define ZEBRA_EVPN_MH_ADV_SVI_MAC (1 << 3) + + /* RB tree of Ethernet segments (used for EVPN-MH) */ + struct zebra_es_rb_head es_rb_tree; + /* List of local ESs */ + struct list *local_es_list; + + /* EVPN MH broadcast domains indexed by the VID */ + struct hash *evpn_vlan_table; + + /* A base L2-VNI is maintained to derive parameters such as + * ES originator-IP. + * XXX: once single vxlan device model becomes available this will + * not be necessary + */ + struct zebra_evpn *es_base_evpn; + struct in_addr es_originator_ip; + + /* L2 NH and NHG ids - + * Most significant 4 bits is type. Lower 28 bits is the value + * allocated from the nh_id_bitmap. + */ + bitfield_t nh_id_bitmap; +#define EVPN_NH_ID_MAX (16*1024) +#define EVPN_NH_ID_VAL_MASK 0xffffff +/* The purpose of using different types for NHG and NH is NOT to manage the + * id space separately. It is simply to make debugging easier. + */ +#define EVPN_NH_ID_TYPE_BIT (NHG_TYPE_L2_NH << NHG_ID_TYPE_POS) +#define EVPN_NHG_ID_TYPE_BIT (NHG_TYPE_L2 << NHG_ID_TYPE_POS) + /* L2-NHG table - key: nhg_id, data: zebra_evpn_es */ + struct hash *nhg_table; + /* L2-NH table - key: vtep_up, data: zebra_evpn_nh */ + struct hash *nh_ip_table; + + /* XXX - re-visit the default hold timer value */ + int mac_hold_time; +#define ZEBRA_EVPN_MH_MAC_HOLD_TIME_DEF (18 * 60) + int neigh_hold_time; +#define ZEBRA_EVPN_MH_NEIGH_HOLD_TIME_DEF (18 * 60) + + /* During this period access ports will be held in a protodown + * state + */ + int startup_delay_time; /* seconds */ +#define ZEBRA_EVPN_MH_STARTUP_DELAY_DEF (3 * 60) + struct thread *startup_delay_timer; + + /* Number of configured uplinks */ + uint32_t uplink_cfg_cnt; + /* Number of operationally-up uplinks */ + uint32_t uplink_oper_up_cnt; + + /* These protodown bits are inherited by all ES bonds */ + uint32_t protodown_rc; +}; + +/* returns TRUE if the EVPN is ready to be sent to BGP */ +static inline bool zebra_evpn_send_to_client_ok(struct zebra_evpn *zevpn) +{ + return !!(zevpn->flags & ZEVPN_READY_FOR_BGP); +} + +static inline bool zebra_evpn_mac_is_es_local(struct zebra_mac *mac) +{ + return mac->es && (mac->es->flags & ZEBRA_EVPNES_LOCAL); +} + +/* Returns true if the id is of L2-NHG or L2-NH type */ +static inline bool zebra_evpn_mh_is_fdb_nh(uint32_t id) +{ + return ((id & EVPN_NHG_ID_TYPE_BIT) || + (id & EVPN_NH_ID_TYPE_BIT)); +} + +static inline bool +zebra_evpn_es_local_mac_via_network_port(struct zebra_evpn_es *es) +{ + return !(es->flags & ZEBRA_EVPNES_OPER_UP) + && (zmh_info->flags & ZEBRA_EVPN_MH_REDIRECT_OFF); +} + +static inline bool zebra_evpn_mh_do_dup_addr_detect(void) +{ + return !(zmh_info->flags & ZEBRA_EVPN_MH_DUP_ADDR_DETECT_OFF); +} + +static inline bool zebra_evpn_mh_do_adv_reachable_neigh_only(void) +{ + return !!(zmh_info->flags & ZEBRA_EVPN_MH_ADV_REACHABLE_NEIGH_ONLY); +} + +static inline bool zebra_evpn_mh_do_adv_svi_mac(void) +{ + return zmh_info && (zmh_info->flags & ZEBRA_EVPN_MH_ADV_SVI_MAC); +} + +/*****************************************************************************/ +extern esi_t *zero_esi; +extern void zebra_evpn_mh_init(void); +extern void zebra_evpn_mh_terminate(void); +extern bool zebra_evpn_is_if_es_capable(struct zebra_if *zif); +extern void zebra_evpn_if_init(struct zebra_if *zif); +extern void zebra_evpn_if_cleanup(struct zebra_if *zif); +extern void zebra_evpn_es_evi_init(struct zebra_evpn *zevpn); +extern void zebra_evpn_es_evi_cleanup(struct zebra_evpn *zevpn); +extern void zebra_evpn_vxl_evpn_set(struct zebra_if *zif, + struct zebra_evpn *zevpn, bool set); +extern void zebra_evpn_es_set_base_evpn(struct zebra_evpn *zevpn); +extern void zebra_evpn_es_clear_base_evpn(struct zebra_evpn *zevpn); +extern void zebra_evpn_vl_vxl_ref(uint16_t vid, struct zebra_if *vxlan_zif); +extern void zebra_evpn_vl_vxl_deref(uint16_t vid, struct zebra_if *vxlan_zif); +extern void zebra_evpn_vl_mbr_ref(uint16_t vid, struct zebra_if *zif); +extern void zebra_evpn_vl_mbr_deref(uint16_t vid, struct zebra_if *zif); +extern void zebra_evpn_es_send_all_to_client(bool add); +extern void zebra_evpn_es_if_oper_state_change(struct zebra_if *zif, bool up); +extern void zebra_evpn_es_show(struct vty *vty, bool uj); +extern void zebra_evpn_es_show_detail(struct vty *vty, bool uj); +extern void zebra_evpn_es_show_esi(struct vty *vty, bool uj, esi_t *esi); +extern void zebra_evpn_update_all_es(struct zebra_evpn *zevpn); +extern void zebra_evpn_proc_remote_es(ZAPI_HANDLER_ARGS); +int zebra_evpn_remote_es_add(const esi_t *esi, struct in_addr vtep_ip, + bool esr_rxed, uint8_t df_alg, uint16_t df_pref); +int zebra_evpn_remote_es_del(const esi_t *esi, struct in_addr vtep_ip); +extern void zebra_evpn_es_evi_show(struct vty *vty, bool uj, int detail); +extern void zebra_evpn_es_evi_show_vni(struct vty *vty, bool uj, + vni_t vni, int detail); +extern void zebra_evpn_es_mac_deref_entry(struct zebra_mac *mac); +extern bool zebra_evpn_es_mac_ref_entry(struct zebra_mac *mac, + struct zebra_evpn_es *es); +extern bool zebra_evpn_es_mac_ref(struct zebra_mac *mac, const esi_t *esi); +extern struct zebra_evpn_es *zebra_evpn_es_find(const esi_t *esi); +extern void zebra_evpn_interface_init(void); +extern int zebra_evpn_mh_if_write(struct vty *vty, struct interface *ifp); +extern void zebra_evpn_acc_vl_show(struct vty *vty, bool uj); +extern void zebra_evpn_acc_vl_show_detail(struct vty *vty, bool uj); +extern void zebra_evpn_acc_vl_show_vid(struct vty *vty, bool uj, vlanid_t vid); +extern void zebra_evpn_if_es_print(struct vty *vty, json_object *json, + struct zebra_if *zif); +extern void zebra_evpn_es_cleanup(void); +extern int zebra_evpn_mh_mac_holdtime_update(struct vty *vty, + uint32_t duration, bool set_default); +void zebra_evpn_mh_config_write(struct vty *vty); +int zebra_evpn_mh_neigh_holdtime_update(struct vty *vty, + uint32_t duration, bool set_default); +void zebra_evpn_es_local_br_port_update(struct zebra_if *zif); +extern int zebra_evpn_mh_startup_delay_update(struct vty *vty, + uint32_t duration, + bool set_default); +extern void zebra_evpn_mh_uplink_oper_update(struct zebra_if *zif); +extern void zebra_evpn_mh_update_protodown_bond_mbr(struct zebra_if *zif, + bool clear, + const char *caller); +extern bool zebra_evpn_is_es_bond(struct interface *ifp); +extern bool zebra_evpn_is_es_bond_member(struct interface *ifp); +extern void zebra_evpn_mh_print(struct vty *vty); +extern void zebra_evpn_mh_json(json_object *json); +extern bool zebra_evpn_nhg_is_local_es(uint32_t nhg_id, + struct zebra_evpn_es **local_es); +extern int zebra_evpn_mh_redirect_off(struct vty *vty, bool redirect_off); +extern void zebra_evpn_l2_nh_show(struct vty *vty, bool uj); +extern void zebra_evpn_acc_bd_svi_set(struct zebra_if *vlan_zif, + struct zebra_if *br_zif, bool is_up); +extern void zebra_evpn_acc_bd_svi_mac_add(struct interface *vlan_if); +extern void zebra_evpn_es_bypass_update(struct zebra_evpn_es *es, + struct interface *ifp, bool bypass); +extern void zebra_evpn_proc_remote_nh(ZAPI_HANDLER_ARGS); +extern struct zebra_evpn_es_evi * +zebra_evpn_es_evi_find(struct zebra_evpn_es *es, struct zebra_evpn *zevpn); + +#endif /* _ZEBRA_EVPN_MH_H */ |