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1/*
2 * Zebra EVPN MAC Data structures and definitions
3 * These are "internal" to this function.
4 * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
5 * Copyright (C) 2020 Volta Networks.
6 *
7 * This file is part of FRR.
8 *
9 * FRR is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2, or (at your option) any
12 * later version.
13 *
14 * FRR is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with FRR; see the file COPYING. If not, write to the Free
21 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
22 * 02111-1307, USA.
23 */
24
25#ifndef _ZEBRA_EVPN_MAC_H
26#define _ZEBRA_EVPN_MAC_H
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
32typedef struct zebra_mac_t_ zebra_mac_t;
33
34struct host_rb_entry {
35 RB_ENTRY(host_rb_entry) hl_entry;
36
37 struct prefix p;
38};
39
40RB_HEAD(host_rb_tree_entry, host_rb_entry);
41RB_PROTOTYPE(host_rb_tree_entry, host_rb_entry, hl_entry,
42 host_rb_entry_compare);
43/*
44 * MAC hash table.
45 *
46 * This table contains the MAC addresses pertaining to this VNI.
47 * This includes local MACs learnt on an attached VLAN that maps
48 * to this VNI as well as remote MACs learnt and installed by BGP.
49 * Local MACs will be known either on a VLAN sub-interface or
50 * on (port, VLAN); however, it is sufficient for zebra to maintain
51 * against the VNI i.e., it does not need to retain the local "port"
52 * information. The correct VNI will be obtained as zebra maintains
53 * the mapping (of VLAN to VNI).
54 */
55struct zebra_mac_t_ {
56 /* MAC address. */
57 struct ethaddr macaddr;
58
59 uint32_t flags;
60#define ZEBRA_MAC_LOCAL 0x01
61#define ZEBRA_MAC_REMOTE 0x02
62#define ZEBRA_MAC_AUTO 0x04 /* Auto created for neighbor. */
63#define ZEBRA_MAC_STICKY 0x08 /* Static MAC */
64#define ZEBRA_MAC_REMOTE_RMAC 0x10 /* remote router mac */
65#define ZEBRA_MAC_DEF_GW 0x20
66/* remote VTEP advertised MAC as default GW */
67#define ZEBRA_MAC_REMOTE_DEF_GW 0x40
68#define ZEBRA_MAC_DUPLICATE 0x80
69#define ZEBRA_MAC_FPM_SENT 0x100 /* whether or not this entry was sent. */
70/* MAC is locally active on an ethernet segment peer */
71#define ZEBRA_MAC_ES_PEER_ACTIVE 0x200
72/* MAC has been proxy-advertised by peers. This means we need to
73 * keep the entry for forwarding but cannot advertise it
74 */
75#define ZEBRA_MAC_ES_PEER_PROXY 0x400
76/* We have not been able to independently establish that the host is
77 * local connected but one or more ES peers claims it is.
78 * We will maintain the entry for forwarding purposes and continue
79 * to advertise it as locally attached but with a "proxy" flag
80 */
81#define ZEBRA_MAC_LOCAL_INACTIVE 0x800
82
83#define ZEBRA_MAC_ALL_LOCAL_FLAGS (ZEBRA_MAC_LOCAL | ZEBRA_MAC_LOCAL_INACTIVE)
84#define ZEBRA_MAC_ALL_PEER_FLAGS \
85 (ZEBRA_MAC_ES_PEER_PROXY | ZEBRA_MAC_ES_PEER_ACTIVE)
86
87 /* back pointer to zevpn */
88 zebra_evpn_t *zevpn;
89
90 /* Local or remote info. */
91 union {
92 struct {
93 ifindex_t ifindex;
47c58929 94 ns_id_t ns_id;
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95 vlanid_t vid;
96 } local;
97
98 struct in_addr r_vtep_ip;
99 } fwd_info;
100
101 /* Local or remote ES */
102 struct zebra_evpn_es *es;
103 /* memory used to link the mac to the es */
104 struct listnode es_listnode;
105
106 /* Mobility sequence numbers associated with this entry. */
107 uint32_t rem_seq;
108 uint32_t loc_seq;
109
110 /* List of neigh associated with this mac */
111 struct list *neigh_list;
112
113 /* list of hosts pointing to this remote RMAC */
114 struct host_rb_tree_entry host_rb;
115
116 /* Duplicate mac detection */
117 uint32_t dad_count;
118
119 struct thread *dad_mac_auto_recovery_timer;
120
121 struct timeval detect_start_time;
122
123 time_t dad_dup_detect_time;
124
125 /* used for ageing out the PEER_ACTIVE flag */
126 struct thread *hold_timer;
127
128 /* number of neigh entries (using this mac) that have
129 * ZEBRA_MAC_ES_PEER_ACTIVE or ZEBRA_NEIGH_ES_PEER_PROXY
130 */
131 uint32_t sync_neigh_cnt;
132};
133
134/*
135 * Context for MAC hash walk - used by callbacks.
136 */
137struct mac_walk_ctx {
138 zebra_evpn_t *zevpn; /* EVPN hash */
139 struct zebra_vrf *zvrf; /* VRF - for client notification. */
140 int uninstall; /* uninstall from kernel? */
141 int upd_client; /* uninstall from client? */
142
143 uint32_t flags;
144#define DEL_LOCAL_MAC 0x1
145#define DEL_REMOTE_MAC 0x2
146#define DEL_ALL_MAC (DEL_LOCAL_MAC | DEL_REMOTE_MAC)
147#define DEL_REMOTE_MAC_FROM_VTEP 0x4
148#define SHOW_REMOTE_MAC_FROM_VTEP 0x8
149
150 struct in_addr r_vtep_ip; /* To walk MACs from specific VTEP */
151
152 struct vty *vty; /* Used by VTY handlers */
153 uint32_t count; /* Used by VTY handlers */
154 struct json_object *json; /* Used for JSON Output */
155 bool print_dup; /* Used to print dup addr list */
156};
157
158struct rmac_walk_ctx {
159 struct vty *vty;
160 struct json_object *json;
161};
162
163/* temporary datastruct to pass info between the mac-update and
164 * neigh-update while handling mac-ip routes
165 */
166struct sync_mac_ip_ctx {
167 bool ignore_macip;
168 bool mac_created;
169 bool mac_inactive;
170 bool mac_dp_update_deferred;
171 zebra_mac_t *mac;
172};
173
19fdd1be 174/**************************** SYNC MAC handling *****************************/
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175/**************************** SYNC MAC handling *****************************/
176/* if the mac has been added of a mac-route from the peer
177 * or if it is being referenced by a neigh added by the
178 * peer we cannot let it age out i.e. we set the static bit
179 * in the dataplane
180 */
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181static inline bool zebra_evpn_mac_is_static(zebra_mac_t *mac)
182{
183 return ((mac->flags & ZEBRA_MAC_ALL_PEER_FLAGS) || mac->sync_neigh_cnt);
184}
185
186/* mac needs to be locally active or active on an ES peer */
187static inline bool zebra_evpn_mac_is_ready_for_bgp(uint32_t flags)
188{
189 return (flags & ZEBRA_MAC_LOCAL)
190 && (!(flags & ZEBRA_MAC_LOCAL_INACTIVE)
191 || (flags & ZEBRA_MAC_ES_PEER_ACTIVE));
192}
193
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194void zebra_evpn_mac_stop_hold_timer(zebra_mac_t *mac);
195
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196static inline void zebra_evpn_mac_clear_sync_info(zebra_mac_t *mac)
197{
198 UNSET_FLAG(mac->flags, ZEBRA_MAC_ALL_PEER_FLAGS);
199 zebra_evpn_mac_stop_hold_timer(mac);
200}
201
202struct hash *zebra_mac_db_create(const char *desc);
203uint32_t num_valid_macs(zebra_evpn_t *zevi);
204uint32_t num_dup_detected_macs(zebra_evpn_t *zevi);
205int zebra_evpn_rem_mac_uninstall(zebra_evpn_t *zevi, zebra_mac_t *mac);
206int zebra_evpn_rem_mac_install(zebra_evpn_t *zevi, zebra_mac_t *mac,
207 bool was_static);
208void zebra_evpn_deref_ip2mac(zebra_evpn_t *zevi, zebra_mac_t *mac);
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209zebra_mac_t *zebra_evpn_mac_lookup(zebra_evpn_t *zevi, struct ethaddr *mac);
210zebra_mac_t *zebra_evpn_mac_add(zebra_evpn_t *zevi, struct ethaddr *macaddr);
211int zebra_evpn_mac_del(zebra_evpn_t *zevi, zebra_mac_t *mac);
212int zebra_evpn_macip_send_msg_to_client(uint32_t id, struct ethaddr *macaddr,
213 struct ipaddr *ip, uint8_t flags,
214 uint32_t seq, int state,
215 struct zebra_evpn_es *es, uint16_t cmd);
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216void zebra_evpn_print_mac(zebra_mac_t *mac, void *ctxt, json_object *json);
217void zebra_evpn_print_mac_hash(struct hash_bucket *bucket, void *ctxt);
218void zebra_evpn_print_mac_hash_detail(struct hash_bucket *bucket, void *ctxt);
219void zebra_evpn_sync_mac_dp_install(zebra_mac_t *mac, bool set_inactive,
220 bool force_clear_static,
221 const char *caller);
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222void zebra_evpn_mac_send_add_del_to_client(zebra_mac_t *mac, bool old_bgp_ready,
223 bool new_bgp_ready);
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224
225void zebra_evpn_mac_del_all(zebra_evpn_t *zevi, int uninstall, int upd_client,
226 uint32_t flags);
227int zebra_evpn_mac_send_add_to_client(vni_t vni, struct ethaddr *macaddr,
228 uint32_t mac_flags, uint32_t seq,
229 struct zebra_evpn_es *es);
230int zebra_evpn_mac_send_del_to_client(vni_t vni, struct ethaddr *macaddr,
231 uint32_t flags, bool force);
232void zebra_evpn_send_mac_list_to_client(zebra_evpn_t *zevi);
233zebra_mac_t *
234zebra_evpn_proc_sync_mac_update(zebra_evpn_t *zevi, struct ethaddr *macaddr,
235 uint16_t ipa_len, struct ipaddr *ipaddr,
236 uint8_t flags, uint32_t seq, esi_t *esi,
237 struct sync_mac_ip_ctx *ctx);
238void zebra_evpn_sync_mac_del(zebra_mac_t *mac);
239void zebra_evpn_rem_mac_del(zebra_evpn_t *zevi, zebra_mac_t *mac);
240void zebra_evpn_print_dad_mac_hash(struct hash_bucket *bucket, void *ctxt);
241void zebra_evpn_print_dad_mac_hash_detail(struct hash_bucket *bucket,
242 void *ctxt);
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243int process_mac_remote_macip_add(zebra_evpn_t *zevpn, struct zebra_vrf *zvrf,
244 struct ethaddr *macaddr, uint16_t ipa_len,
245 struct ipaddr *ipaddr, zebra_mac_t **macp,
246 struct in_addr vtep_ip, uint8_t flags,
247 uint32_t seq, esi_t *esi);
b2998086 248
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249int zebra_evpn_add_update_local_mac(struct zebra_vrf *zvrf, zebra_evpn_t *zevpn,
250 struct interface *ifp,
251 struct ethaddr *macaddr, vlanid_t vid,
252 bool sticky, bool local_inactive,
253 bool dp_static);
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254int zebra_evpn_del_local_mac(zebra_evpn_t *zevpn, struct ethaddr *macaddr,
255 struct interface *ifp);
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256int zebra_evpn_mac_gw_macip_add(struct interface *ifp, zebra_evpn_t *zevpn,
257 struct ipaddr *ip, zebra_mac_t **macp,
258 struct ethaddr *macaddr, vlanid_t vlan_id);
ad6ca5f4 259
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260#ifdef __cplusplus
261}
262#endif
263
264#endif /*_ZEBRA_EVPN_MAC_H */