Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 280 insertions, 0 deletions

diff --git a/zebra/zebra_evpn_neigh.h b/zebra/zebra_evpn_neigh.h
new file mode 100644
index 0000000..c82b367
--- /dev/null
+++ b/zebra/zebra_evpn_neigh.h
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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.
+ */
+
+#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;
+
+	/* Refcnt - Only used by SVD neighs currently */
+	uint32_t refcnt;
+
+	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 event *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 event *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);
+	EVENT_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 zebra_mac *mac);
+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 */