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zebra: Fix MAC change handling for a neighbor

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When the MAC changes for a local neighbor, ensure that the neighbor data
structure as well as the link between the neighbor and MAC data structures
is updated correctly.

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Mitesh Kanjariya <mitesh@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>

Ticket: CM-17565
Reviewed By: CCR-6605
Testing Done: Manual, evpn-smoke
This commit is contained in:
vivek 2017-08-13 21:52:04 -07:00 committed by Mitesh Kanjariya
parent cb499ebbaa
commit b682f6de5a
7 changed files with 118 additions and 113 deletions
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75
bgpd/bgp_evpn.c
View File

@ -2192,58 +2192,58 @@ char *bgp_evpn_label2str(mpls_label_t *label, char *buf, int len)
* NOTE: We don't use prefix2str as the output here is a bit different.
*/
void
bgp_evpn_route2json (struct prefix_evpn *p, json_object *json)
bgp_evpn_route2json(struct prefix_evpn *p, json_object *json)
{
char buf1[ETHER_ADDR_STRLEN];
char buf2[PREFIX2STR_BUFFER];
char buf1[ETHER_ADDR_STRLEN];
char buf2[PREFIX2STR_BUFFER];
if (!json)
return;
if (!json)
return;
if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) {
json_object_int_add (json, "routeType", p->prefix.route_type);
json_object_int_add (json, "ethTag", 0);
json_object_int_add (json,
"ipLen",
IS_EVPN_PREFIX_IPADDR_V4 (p) ?
json_object_int_add(json, "routeType", p->prefix.route_type);
json_object_int_add(json, "ethTag", 0);
json_object_int_add(json,
"ipLen",
IS_EVPN_PREFIX_IPADDR_V4 (p) ?
IPV4_MAX_BITLEN : IPV6_MAX_BITLEN);
json_object_string_add (json, "ip",
inet_ntoa (p->prefix.ip.ipaddr_v4));
json_object_string_add(json, "ip",
inet_ntoa (p->prefix.ip.ipaddr_v4));
}
else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) {
if (IS_EVPN_PREFIX_IPADDR_NONE(p)) {
json_object_int_add (json, "routeType", p->prefix.route_type);
json_object_int_add (json, "esi", 0); /* TODO: we don't support esi yet */
json_object_int_add (json, "ethTag", 0);
json_object_int_add (json, "macLen", 8 * ETH_ALEN);
json_object_string_add (json, "mac",
prefix_mac2str (&p->prefix.mac,
buf1, sizeof (buf1)));
json_object_int_add(json, "routeType", p->prefix.route_type);
json_object_int_add(json, "esi", 0); /* TODO: we don't support esi yet */
json_object_int_add(json, "ethTag", 0);
json_object_int_add(json, "macLen", 8 * ETH_ALEN);
json_object_string_add(json, "mac",
prefix_mac2str (&p->prefix.mac,
buf1, sizeof (buf1)));
} else {
u_char family;
family = IS_EVPN_PREFIX_IPADDR_V4(p) ? \
AF_INET : AF_INET6;
json_object_int_add (json, "routeType",
json_object_int_add(json, "routeType",
p->prefix.route_type);
json_object_int_add (json, "esi", 0); /* TODO: we don't support esi yet */
json_object_int_add (json, "ethTag", 0);
json_object_int_add (json, "macLen",
8 * ETH_ALEN);
json_object_string_add (json, "mac",
prefix_mac2str (&p->prefix.mac,
buf1,
sizeof (buf1)));
json_object_int_add (json, "ipLen",
IS_EVPN_PREFIX_IPADDR_V4 (p) ?
json_object_int_add(json, "esi", 0); /* TODO: we don't support esi yet */
json_object_int_add(json, "ethTag", 0);
json_object_int_add(json, "macLen",
8 * ETH_ALEN);
json_object_string_add(json, "mac",
prefix_mac2str (&p->prefix.mac,
buf1,
sizeof (buf1)));
json_object_int_add(json, "ipLen",
IS_EVPN_PREFIX_IPADDR_V4 (p) ?
IPV4_MAX_BITLEN :
IPV6_MAX_BITLEN);
json_object_string_add (json, "ip",
inet_ntop (family,
&p->prefix.ip.ip.addr,
buf2,
PREFIX2STR_BUFFER));
json_object_string_add(json, "ip",
inet_ntop (family,
&p->prefix.ip.ip.addr,
buf2,
PREFIX2STR_BUFFER));
}
} else {
/* Currently, this is to cater to other AF_ETHERNET code. */
@ -2683,10 +2683,7 @@ int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp)
if (bgp_debug_update(ri->peer, &rn->p,
NULL, 1))
zlog_debug(
"%u: prefix %s with "
"attr %s - DENIED"
"due to martian or seld"
"nexthop",
"%u: prefix %s with attr %s - DENIED due to martian or self nexthop",
bgp->vrf_id,
prefix2str(
&rn->p,

3
bgpd/bgp_evpn.h
View File

@ -28,8 +28,7 @@
extern void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw);
extern char *bgp_evpn_label2str(mpls_label_t *label, char *buf, int len);
extern char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len);
extern void
bgp_evpn_route2json (struct prefix_evpn *p, json_object *json);
extern void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json);
extern void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p,
struct prefix_rd *prd, mpls_label_t *label,
struct attr *attr, int addpath_encode,

5
bgpd/bgp_evpn_vty.c
View File

@ -76,8 +76,8 @@ static void display_import_rt(struct vty *vty, struct irt_node *irt,
char rt_buf[RT_ADDRSTRLEN];
if (json) {
json_rt = json_object_new_object ();
json_vnis = json_object_new_array ();
json_rt = json_object_new_object();
json_vnis = json_object_new_array();
}
/* TODO: This needs to go into a function */
@ -521,6 +521,7 @@ static void show_vni_entry(struct hash_backet *backet, void *args[])
if (json) {
char vni_str[VNI_STR_LEN];
json_object_object_add(json_vni, "exportRTs", json_export_rtl);
snprintf(vni_str, VNI_STR_LEN, "%u", vpn->vni);
json_object_object_add(json, vni_str, json_vni);

23
bgpd/bgp_route.c
View File

@ -6246,7 +6246,8 @@ static void route_vty_out_route(struct prefix *p, struct vty *vty,
|| (IN_CLASSB(destination) && p->prefixlen == 16)
|| (IN_CLASSA(destination) && p->prefixlen == 8)
|| p->u.prefix4.s_addr == 0) {
/* When mask is natural, mask is not displayed. */
/* When mask is natural,
mask is not displayed. */
} else
len += vty_out(vty, "/%d", p->prefixlen);
} else {
@ -6261,12 +6262,12 @@ static void route_vty_out_route(struct prefix *p, struct vty *vty,
len = vty_out(vty, "%s", buf);
} else if (p->family == AF_EVPN) {
#if defined(HAVE_CUMULUS)
if (!json)
len = vty_out (vty, "%s",
bgp_evpn_route2str((struct prefix_evpn *)p,
buf, BUFSIZ));
else
bgp_evpn_route2json ( (struct prefix_evpn *) p, json);
if (!json)
len = vty_out(vty, "%s",
bgp_evpn_route2str((struct prefix_evpn *)p,
buf, BUFSIZ));
else
bgp_evpn_route2json((struct prefix_evpn *) p, json);
#else
prefix2str(p, buf, PREFIX_STRLEN);
len = vty_out(vty, "%s", buf);
@ -6393,7 +6394,7 @@ void route_vty_out(struct vty *vty, struct prefix *p, struct bgp_info *binfo,
else
vty_out(vty, "%*s", 17, " ");
} else {
route_vty_out_route (p, vty, json_path);
route_vty_out_route(p, vty, json_path);
}
/* Print attribute */
@ -8379,9 +8380,9 @@ void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
if (has_valid_label)
json_object_int_add(json, "localLabel", label);
json_object_string_add (json, "prefix",
prefix2str (p, prefix_str,
sizeof (prefix_str)));
json_object_string_add(json, "prefix",
prefix2str(p, prefix_str,
sizeof(prefix_str)));
} else {
#if defined(HAVE_CUMULUS)
if (safi == SAFI_EVPN)

6
bgpd/bgp_vty.c
View File

@ -9040,8 +9040,7 @@ static void bgp_show_peer(struct vty *vty, struct peer *p, u_char use_json,
" Hostname Capability:");
if (CHECK_FLAG(p->cap, PEER_CAP_HOSTNAME_ADV)) {
vty_out(vty, " advertised (name: %s, "
"domain name: %s)",
vty_out(vty, " advertised (name: %s,domain name: %s)",
bgp->peer_self->hostname ?
bgp->peer_self->hostname
: "n/a",
@ -9053,8 +9052,7 @@ static void bgp_show_peer(struct vty *vty, struct peer *p, u_char use_json,
}
if (CHECK_FLAG(p->cap, PEER_CAP_HOSTNAME_RCV)) {
vty_out(vty, " received (name: %s, "
"domain name: %s)",
vty_out(vty, " received (name: %s,domain name: %s)",
p->hostname ?
p->hostname : "n/a",
p->domainname ?

14
zebra/zebra_l2.c
View File

@ -225,17 +225,17 @@ void zebra_l2if_update_bridge_slave(struct interface *ifp,
/* Set up or remove link with master */
if (bridge_ifindex != IFINDEX_INTERNAL) {
zebra_l2_map_slave_to_bridge (&zif->brslave_info);
zebra_l2_map_slave_to_bridge(&zif->brslave_info);
/* In the case of VxLAN, invoke the handler for EVPN. */
if (zif->zif_type == ZEBRA_IF_VXLAN)
zebra_vxlan_if_update (ifp, ZEBRA_VXLIF_MASTER_CHANGE);
zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_MASTER_CHANGE);
} else if (old_bridge_ifindex != IFINDEX_INTERNAL) {
/* In the case of VxLAN, invoke the handler for EVPN. Note that
* this should be done *prior* to unmapping the interface from the
* bridge.
/* In the case of VxLAN, invoke the handler for EVPN.
* Note that this should be done *prior* to unmapping the interface
* from the bridge.
*/
if (zif->zif_type == ZEBRA_IF_VXLAN)
zebra_vxlan_if_update (ifp, ZEBRA_VXLIF_MASTER_CHANGE);
zebra_l2_unmap_slave_from_bridge (&zif->brslave_info);
zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_MASTER_CHANGE);
zebra_l2_unmap_slave_from_bridge(&zif->brslave_info);
}
}

105
zebra/zebra_vxlan.c
View File

@ -1441,7 +1441,7 @@ static void zvni_gw_macip_del_for_vni_hash(struct hash_backet *backet,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
return;
zl2_info = zif->l2info.vxl;
@ -1485,7 +1485,7 @@ static void zvni_gw_macip_add_for_vni_hash(struct hash_backet *backet,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
return;
zl2_info = zif->l2info.vxl;
@ -2889,10 +2889,9 @@ int zebra_vxlan_local_neigh_add_update(struct interface *ifp,
zebra_vni_t *zvni;
zebra_neigh_t *n;
struct zebra_vrf *zvrf;
zebra_mac_t *zmac;
zebra_mac_t *zmac, *old_zmac;
char buf[ETHER_ADDR_STRLEN];
char buf2[INET6_ADDRSTRLEN];
int send_upd = 1, send_del = 0;
/* We are only interested in neighbors on an SVI that resides on top
* of a VxLAN bridge.
@ -2947,19 +2946,35 @@ int zebra_vxlan_local_neigh_add_update(struct interface *ifp,
if (memcmp(n->emac.octet, macaddr->octet,
ETH_ALEN)
== 0) {
if (n->ifindex == ifp->ifindex)
/* we're not interested in whatever has
* changed. */
return 0;
/* client doesn't care about a purely local
* change. */
send_upd = 0;
} else
/* If the MAC has changed, issue a delete first
* as this means a
* different MACIP route.
/* Update any params and return - client doesn't
* care about a purely local change.
*/
send_del = 1;
n->ifindex = ifp->ifindex;
return 0;
} else {
/* If the MAC has changed,
* need to issue a delete first
* as this means a different MACIP route.
* Also, need to do some unlinking/relinking.
*/
zvni_neigh_send_del_to_client(zvrf, zvni->vni,
&n->ip, &n->emac,
0);
old_zmac = zvni_mac_lookup(zvni, &n->emac);
if (old_zmac) {
listnode_delete(old_zmac->neigh_list,
n);
zvni_deref_ip2mac(zvni, old_zmac, 0);
}
/* Set "local" forwarding info. */
SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
n->ifindex = ifp->ifindex;
memcpy(&n->emac, macaddr, ETH_ALEN);
/* Link to new MAC */
listnode_add_sort(zmac->neigh_list, n);
}
} else if (ext_learned)
/* The neighbor is remote and that is the notification we got.
*/
@ -2973,6 +2988,8 @@ int zebra_vxlan_local_neigh_add_update(struct interface *ifp,
{
UNSET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE);
n->r_vtep_ip.s_addr = 0;
SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
n->ifindex = ifp->ifindex;
}
} else {
n = zvni_neigh_add(zvni, ip, macaddr);
@ -2984,17 +3001,11 @@ int zebra_vxlan_local_neigh_add_update(struct interface *ifp,
ifp->name, ifp->ifindex, zvni->vni);
return -1;
}
/* Set "local" forwarding info. */
SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
n->ifindex = ifp->ifindex;
}
/* Issue delete for older info, if needed. */
if (send_del)
zvni_neigh_send_del_to_client(zvrf, zvni->vni, &n->ip, &n->emac,
0);
/* Set "local" forwarding info. */
SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
n->ifindex = ifp->ifindex;
/* Before we program this in BGP, we need to check if MAC is locally
* learnt as well */
if (!CHECK_FLAG(zmac->flags, ZEBRA_MAC_LOCAL)) {
@ -3008,23 +3019,20 @@ int zebra_vxlan_local_neigh_add_update(struct interface *ifp,
return 0;
}
/* Inform BGP if required. */
if (send_upd) {
if (IS_ZEBRA_DEBUG_VXLAN)
zlog_debug(
"%u: neigh %s (MAC %s) is now ACTIVE on VNI %u",
ifp->vrf_id, ipaddr2str(ip, buf2, sizeof(buf2)),
prefix_mac2str(macaddr, buf, sizeof(buf)),
zvni->vni);
/* Inform BGP. */
if (IS_ZEBRA_DEBUG_VXLAN)
zlog_debug(
"%u: neigh %s (MAC %s) is now ACTIVE on VNI %u",
ifp->vrf_id, ipaddr2str(ip, buf2, sizeof(buf2)),
prefix_mac2str(macaddr, buf, sizeof(buf)),
zvni->vni);
ZEBRA_NEIGH_SET_ACTIVE(n);
return zvni_neigh_send_add_to_client(zvrf, zvni->vni, ip,
macaddr, 0);
}
return 0;
ZEBRA_NEIGH_SET_ACTIVE(n);
return zvni_neigh_send_add_to_client(zvrf, zvni->vni, ip,
macaddr, 0);
}
/*
* Handle message from client to delete a remote MACIP for a VNI.
*/
@ -3096,7 +3104,7 @@ int zebra_vxlan_remote_macip_del(struct zserv *client, int sock, u_short length,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
continue;
/* The remote VTEP specified is normally expected to exist, but
@ -3246,7 +3254,7 @@ int zebra_vxlan_remote_macip_add(struct zserv *client, int sock, u_short length,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
continue;
/* The remote VTEP specified should normally exist, but it is
@ -3738,14 +3746,14 @@ int zebra_vxlan_remote_vtep_del(struct zserv *client, int sock, u_short length,
ifp = zvni->vxlan_if;
if (!ifp) {
zlog_err ("VNI %u hash %p doesn't have intf upon remote VTEP DEL",
zvni->vni, zvni);
continue;
zlog_err("VNI %u hash %p doesn't have intf upon remote VTEP DEL",
zvni->vni, zvni);
continue;
}
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
continue;
/* If the remote VTEP does not exist, there's nothing more to
@ -3817,10 +3825,11 @@ int zebra_vxlan_remote_vtep_add(struct zserv *client, int sock, u_short length,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
continue;
/* If the remote VTEP already exists, there's nothing more to do. */
/* If the remote VTEP already exists,
there's nothing more to do. */
if (zvni_vtep_find(zvni, &vtep_ip))
continue;
@ -4366,7 +4375,7 @@ int zebra_vxlan_advertise_gw_macip(struct zserv *client, int sock,
zif = ifp->info;
/* If down or not mapped to a bridge, we're done. */
if (!if_is_operative (ifp) || !zif->brslave_info.br_if)
if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
return 0;
zl2_info = zif->l2info.vxl;