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/*
* Zebra EVPN Neighbor Data structures and definitions
* These are "internal" to this function.
* Copyright (C) 2016, 2017 Cumulus Networks, Inc.
* Copyright (C) 2020 Volta Networks.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with FRR; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _ZEBRA_EVPN_NEIGH_H
#define _ZEBRA_EVPN_NEIGH_H
#ifdef __cplusplus
extern "C" {
#endif
#define IS_ZEBRA_NEIGH_ACTIVE(n) (n->state == ZEBRA_NEIGH_ACTIVE)
#define IS_ZEBRA_NEIGH_INACTIVE(n) (n->state == ZEBRA_NEIGH_INACTIVE)
#define ZEBRA_NEIGH_SET_ACTIVE(n) n->state = ZEBRA_NEIGH_ACTIVE
#define ZEBRA_NEIGH_SET_INACTIVE(n) n->state = ZEBRA_NEIGH_INACTIVE
/*
* Neighbor hash table.
*
* This table contains the neighbors (IP to MAC bindings) pertaining to
* this VNI. This includes local neighbors learnt on the attached VLAN
* device that maps to this VNI as well as remote neighbors learnt and
* installed by BGP.
* Local neighbors will be known against the VLAN device (SVI); however,
* it is sufficient for zebra to maintain against the VNI. The correct
* VNI will be obtained as zebra maintains the mapping (of VLAN to VNI).
*/
struct zebra_neigh {
/* IP address. */
struct ipaddr ip;
/* MAC address. */
struct ethaddr emac;
/* Back pointer to MAC. Only applicable to hosts in a L2-VNI. */
struct zebra_mac *mac;
/* Underlying interface. */
ifindex_t ifindex;
struct zebra_evpn *zevpn;
uint32_t flags;
#define ZEBRA_NEIGH_LOCAL 0x01
#define ZEBRA_NEIGH_REMOTE 0x02
#define ZEBRA_NEIGH_REMOTE_NH 0x04 /* neigh entry for remote vtep */
#define ZEBRA_NEIGH_DEF_GW 0x08
#define ZEBRA_NEIGH_ROUTER_FLAG 0x10
#define ZEBRA_NEIGH_DUPLICATE 0x20
#define ZEBRA_NEIGH_SVI_IP 0x40
/* rxed from an ES peer */
#define ZEBRA_NEIGH_ES_PEER_ACTIVE 0x80
/* rxed from an ES peer as a proxy advertisement */
#define ZEBRA_NEIGH_ES_PEER_PROXY 0x100
/* We have not been able to independently establish that the host
* is local connected
*/
#define ZEBRA_NEIGH_LOCAL_INACTIVE 0x200
#define ZEBRA_NEIGH_ALL_LOCAL_FLAGS \
(ZEBRA_NEIGH_LOCAL | ZEBRA_NEIGH_LOCAL_INACTIVE)
#define ZEBRA_NEIGH_ALL_PEER_FLAGS \
(ZEBRA_NEIGH_ES_PEER_PROXY | ZEBRA_NEIGH_ES_PEER_ACTIVE)
enum zebra_neigh_state state;
/* Remote VTEP IP - applicable only for remote neighbors. */
struct in_addr r_vtep_ip;
/*
* Mobility sequence numbers associated with this entry. The rem_seq
* represents the sequence number from the client (BGP) for the most
* recent add or update of this entry while the loc_seq represents
* the sequence number informed (or to be informed) by zebra to BGP
* for this entry.
*/
uint32_t rem_seq;
uint32_t loc_seq;
/* list of hosts pointing to this remote NH entry */
struct host_rb_tree_entry host_rb;
/* Duplicate ip detection */
uint32_t dad_count;
struct thread *dad_ip_auto_recovery_timer;
struct timeval detect_start_time;
time_t dad_dup_detect_time;
time_t uptime;
/* used for ageing out the PEER_ACTIVE flag */
struct thread *hold_timer;
};
/*
* Context for neighbor hash walk - used by callbacks.
*/
struct neigh_walk_ctx {
struct zebra_evpn *zevpn; /* VNI hash */
struct zebra_vrf *zvrf; /* VRF - for client notification. */
int uninstall; /* uninstall from kernel? */
int upd_client; /* uninstall from client? */
uint32_t flags;
#define DEL_LOCAL_NEIGH 0x1
#define DEL_REMOTE_NEIGH 0x2
#define DEL_ALL_NEIGH (DEL_LOCAL_NEIGH | DEL_REMOTE_NEIGH)
#define DEL_REMOTE_NEIGH_FROM_VTEP 0x4
#define SHOW_REMOTE_NEIGH_FROM_VTEP 0x8
struct in_addr r_vtep_ip; /* To walk neighbors from specific VTEP */
struct vty *vty; /* Used by VTY handlers */
uint32_t count; /* Used by VTY handlers */
uint8_t addr_width; /* Used by VTY handlers */
struct json_object *json; /* Used for JSON Output */
};
/**************************** SYNC neigh handling **************************/
static inline bool zebra_evpn_neigh_is_static(struct zebra_neigh *neigh)
{
return !!(neigh->flags & ZEBRA_NEIGH_ALL_PEER_FLAGS);
}
static inline bool zebra_evpn_neigh_is_ready_for_bgp(struct zebra_neigh *n)
{
bool mac_ready;
bool neigh_ready;
mac_ready = !!(n->mac->flags & ZEBRA_MAC_LOCAL);
neigh_ready =
((n->flags & ZEBRA_NEIGH_LOCAL) && IS_ZEBRA_NEIGH_ACTIVE(n)
&& (!(n->flags & ZEBRA_NEIGH_LOCAL_INACTIVE)
|| (n->flags & ZEBRA_NEIGH_ES_PEER_ACTIVE)))
? true
: false;
return mac_ready && neigh_ready;
}
static inline void zebra_evpn_neigh_stop_hold_timer(struct zebra_neigh *n)
{
if (!n->hold_timer)
return;
if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x hold stop",
n->zevpn->vni, &n->ip, &n->emac, n->flags);
THREAD_OFF(n->hold_timer);
}
void zebra_evpn_sync_neigh_static_chg(struct zebra_neigh *n, bool old_n_static,
bool new_n_static, bool defer_n_dp,
bool defer_mac_dp, const char *caller);
static inline bool zebra_evpn_neigh_clear_sync_info(struct zebra_neigh *n)
{
bool old_n_static = false;
bool new_n_static = false;
if (n->flags & ZEBRA_NEIGH_ALL_PEER_FLAGS) {
if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x clear",
n->zevpn->vni, &n->ip, &n->emac, n->flags);
old_n_static = zebra_evpn_neigh_is_static(n);
UNSET_FLAG(n->flags, ZEBRA_NEIGH_ALL_PEER_FLAGS);
new_n_static = zebra_evpn_neigh_is_static(n);
if (old_n_static != new_n_static)
zebra_evpn_sync_neigh_static_chg(
n, old_n_static, new_n_static,
true /*defer_dp)*/, false /*defer_mac_dp*/,
__func__);
}
zebra_evpn_neigh_stop_hold_timer(n);
/* if the neigh static flag changed inform that a dp
* re-install maybe needed
*/
return old_n_static != new_n_static;
}
int remote_neigh_count(struct zebra_mac *zmac);
int neigh_list_cmp(void *p1, void *p2);
struct hash *zebra_neigh_db_create(const char *desc);
uint32_t num_dup_detected_neighs(struct zebra_evpn *zevpn);
void zebra_evpn_find_neigh_addr_width(struct hash_bucket *bucket, void *ctxt);
int remote_neigh_count(struct zebra_mac *zmac);
int zebra_evpn_rem_neigh_install(struct zebra_evpn *zevpn,
struct zebra_neigh *n, bool was_static);
void zebra_evpn_install_neigh_hash(struct hash_bucket *bucket, void *ctxt);
int zebra_evpn_neigh_send_add_to_client(vni_t vni, const struct ipaddr *ip,
const struct ethaddr *macaddr,
struct zebra_mac *zmac,
uint32_t neigh_flags, uint32_t seq);
int zebra_evpn_neigh_send_del_to_client(vni_t vni, struct ipaddr *ip,
struct ethaddr *macaddr, uint32_t flags,
int state, bool force);
bool zebra_evpn_neigh_is_bgp_seq_ok(struct zebra_evpn *zevpn,
struct zebra_neigh *n,
const struct ethaddr *macaddr, uint32_t seq,
bool sync);
int zebra_evpn_neigh_del(struct zebra_evpn *zevpn, struct zebra_neigh *n);
void zebra_evpn_sync_neigh_del(struct zebra_neigh *n);
struct zebra_neigh *zebra_evpn_proc_sync_neigh_update(
struct zebra_evpn *zevpn, struct zebra_neigh *n, uint16_t ipa_len,
const struct ipaddr *ipaddr, uint8_t flags, uint32_t seq,
const esi_t *esi, struct sync_mac_ip_ctx *ctx);
void zebra_evpn_neigh_del_all(struct zebra_evpn *zevpn, int uninstall,
int upd_client, uint32_t flags);
struct zebra_neigh *zebra_evpn_neigh_lookup(struct zebra_evpn *zevpn,
const struct ipaddr *ip);
int zebra_evpn_rem_neigh_install(struct zebra_evpn *zevpn,
struct zebra_neigh *n, bool was_static);
void zebra_evpn_process_neigh_on_remote_mac_add(struct zebra_evpn *zevpn,
struct zebra_mac *zmac);
void zebra_evpn_process_neigh_on_local_mac_del(struct zebra_evpn *zevpn,
struct zebra_mac *zmac);
void zebra_evpn_process_neigh_on_local_mac_change(struct zebra_evpn *zevpn,
struct zebra_mac *zmac,
bool seq_change,
bool es_change);
void zebra_evpn_process_neigh_on_remote_mac_del(struct zebra_evpn *zevpn,
struct zebra_mac *zmac);
int zebra_evpn_local_neigh_update(struct zebra_evpn *zevpn,
struct interface *ifp,
const struct ipaddr *ip,
const struct ethaddr *macaddr, bool is_router,
bool local_inactive, bool dp_static);
int zebra_evpn_remote_neigh_update(struct zebra_evpn *zevpn,
struct interface *ifp,
const struct ipaddr *ip,
const struct ethaddr *macaddr,
uint16_t state);
void zebra_evpn_send_neigh_to_client(struct zebra_evpn *zevpn);
void zebra_evpn_clear_dup_neigh_hash(struct hash_bucket *bucket, void *ctxt);
void zebra_evpn_print_neigh(struct zebra_neigh *n, void *ctxt,
json_object *json);
void zebra_evpn_print_neigh_hash(struct hash_bucket *bucket, void *ctxt);
void zebra_evpn_print_neigh_hdr(struct vty *vty, struct neigh_walk_ctx *wctx);
void zebra_evpn_print_neigh_hash_detail(struct hash_bucket *bucket, void *ctxt);
void zebra_evpn_print_dad_neigh_hash(struct hash_bucket *bucket, void *ctxt);
void zebra_evpn_print_dad_neigh_hash_detail(struct hash_bucket *bucket,
void *ctxt);
void zebra_evpn_neigh_remote_macip_add(struct zebra_evpn *zevpn,
struct zebra_vrf *zvrf,
const struct ipaddr *ipaddr,
struct zebra_mac *mac,
struct in_addr vtep_ip, uint8_t flags,
uint32_t seq);
int zebra_evpn_neigh_gw_macip_add(struct interface *ifp,
struct zebra_evpn *zevpn, struct ipaddr *ip,
struct zebra_mac *mac);
void zebra_evpn_neigh_remote_uninstall(struct zebra_evpn *zevpn,
struct zebra_vrf *zvrf,
struct zebra_neigh *n,
struct zebra_mac *mac,
const struct ipaddr *ipaddr);
int zebra_evpn_neigh_del_ip(struct zebra_evpn *zevpn, const struct ipaddr *ip);
#ifdef __cplusplus
}
#endif
#endif /*_ZEBRA_EVPN_NEIGH_H */
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