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zebra: encode dvni with nexthop groups

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Move dvni encoding to common code and add support
for encoding it using nexthop groups.

Signed-off-by: Stephen Worley <sworley@nvidia.com>
This commit is contained in:
Stephen Worley 2022-11-21 11:23:18 -05:00
parent 371298399e
commit e611f5da37
1 changed files with 61 additions and 32 deletions
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93
zebra/rt_netlink.c
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@ -1359,6 +1359,46 @@ static int build_label_stack(struct mpls_label_stack *nh_label,
return num_labels;
}
static bool _netlink_nexthop_encode_dvni_label(const struct nexthop *nexthop,
struct nlmsghdr *nlmsg,
mpls_lse_t *out_lse,
size_t buflen, char *label_buf)
{
struct in_addr ipv4;
if (!nl_attr_put64(nlmsg, buflen, LWTUNNEL_IP_ID,
htonll((uint64_t)out_lse[0])))
return false;
if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) {
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST,
&nexthop->gate.ipv4, 4))
return false;
} else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) {
if (IS_MAPPED_IPV6(&nexthop->gate.ipv6)) {
ipv4_mapped_ipv6_to_ipv4(&nexthop->gate.ipv6, &ipv4);
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, &ipv4,
4))
return false;
} else {
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST,
&nexthop->gate.ipv6, 16))
return false;
}
} else {
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_debug(
"%s: nexthop %pNHv %s must NEXTHOP_TYPE_IPV*_IFINDEX to be vxlan encapped",
__func__, nexthop, label_buf);
return false;
}
return true;
}
static bool _netlink_route_encode_label_info(const struct nexthop *nexthop,
struct nlmsghdr *nlmsg,
size_t buflen, struct rtmsg *rtmsg,
@ -1370,7 +1410,6 @@ static bool _netlink_route_encode_label_info(const struct nexthop *nexthop,
struct rtattr *nest;
struct mpls_label_stack *nh_label;
enum lsp_types_t nh_label_type;
struct in_addr ipv4;
nh_label = nexthop->nh_label;
nh_label_type = nexthop->nh_label_type;
@ -1387,7 +1426,6 @@ static bool _netlink_route_encode_label_info(const struct nexthop *nexthop,
label_buf, label_buf_size);
if (num_labels && nh_label_type == ZEBRA_LSP_EVPN) {
if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE,
LWTUNNEL_ENCAP_IP))
return false;
@ -1396,37 +1434,11 @@ static bool _netlink_route_encode_label_info(const struct nexthop *nexthop,
if (!nest)
return false;
if (!nl_attr_put64(nlmsg, buflen, LWTUNNEL_IP_ID,
htonll((uint64_t)out_lse[0])))
if (_netlink_nexthop_encode_dvni_label(nexthop, nlmsg, out_lse,
buflen,
label_buf) == false)
return false;
if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) {
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST,
&nexthop->gate.ipv4, 4))
return false;
} else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) {
if (IS_MAPPED_IPV6(&nexthop->gate.ipv6)) {
ipv4_mapped_ipv6_to_ipv4(&nexthop->gate.ipv6,
&ipv4);
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST,
&ipv4, 4))
return false;
} else {
if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST,
&nexthop->gate.ipv6, 16))
return false;
}
} else {
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_debug(
"%s: nexthop %pNHv %s must NEXTHOP_TYPE_IPV*_IFINDEX to be vxlan encapped",
__func__, nexthop, label_buf);
return false;
}
nl_attr_nest_end(nlmsg, nest);
} else if (num_labels) {
@ -2720,7 +2732,24 @@ ssize_t netlink_nexthop_msg_encode(uint16_t cmd,
nh->nh_label, nh->nh_label_type, out_lse,
label_buf, sizeof(label_buf));
if (num_labels) {
if (num_labels && nh->nh_label_type == ZEBRA_LSP_EVPN) {
if (!nl_attr_put16(&req->n, buflen,
NHA_ENCAP_TYPE,
LWTUNNEL_ENCAP_IP))
return 0;
nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP);
if (!nest)
return 0;
if (_netlink_nexthop_encode_dvni_label(
nh, &req->n, out_lse, buflen,
label_buf) == false)
return 0;
nl_attr_nest_end(&req->n, nest);
} else if (num_labels) {
/* Set the BoS bit */
out_lse[num_labels - 1] |=
htonl(1 << MPLS_LS_S_SHIFT);