Currently, if multiple distributed gateway ports (DGP) are configured
on a logical router, NAT is disabled as part of commit 15348b7b
(northd: Multiple distributed gateway port support.)
This patch updates the behavior by selectively applying NAT rules at DGPs.
A NAT rule is applied on matching packets entering or leaving a specific
DGP only if the external_ip of the rule belongs to the same subnet as the
DGP.
This patch also updates ovn-nbctl to accept multiple NAT rules of type
`snat` with the same logical_ip but different external_ip for a logical
router.
Signed-off-by: Abhiram Sangana <sangana.abhi...@nutanix.com>
---
NEWS | 1 +
northd/northd.c | 210 +++++++++++++++++++++++++-------------
northd/ovn-northd.8.xml | 27 +++--
ovn-architecture.7.xml | 6 +-
ovn-nb.xml | 4 +-
tests/ovn-nbctl.at | 40 +++++++-
tests/ovn-northd.at | 200 +++++++++++++++++++++++++++++++++---
utilities/ovn-nbctl.8.xml | 18 +++-
utilities/ovn-nbctl.c | 157 ++++++++++++++++++++++++++--
9 files changed, 547 insertions(+), 116 deletions(-)
diff --git a/NEWS b/NEWS
index 53f9718b1..a27f89150 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,6 @@
Post v21.12.0
-------------
+ - Support NAT with multiple distributed gateway ports on a logical router.
OVN v21.12.0 - xx xxx xxxx
--------------------------
diff --git a/northd/northd.c b/northd/northd.c
index c714227b2..7f766158d 100644
--- a/northd/northd.c
+++ b/northd/northd.c
@@ -604,11 +604,11 @@ struct ovn_datapath {
/* Applies to only logical router datapath.
* True if logical router is a gateway router. i.e options:chassis is set.
- * If this is true, then 'l3dgw_port' will be ignored. */
+ * If this is true, then 'l3dgw_ports' will be ignored. */
bool is_gw_router;
- /* OVN northd only needs to know about the logical router gateway port for
- * NAT on a distributed router. The "distributed gateway ports" are
+ /* OVN northd only needs to know about logical router gateway ports for
+ * NAT/LB on a distributed router. The "distributed gateway ports" are
* populated only when there is a gateway chassis or ha chassis group
* specified for some of the ports on the logical router. Otherwise this
* will be NULL. */
@@ -761,16 +761,6 @@ init_nat_entries(struct ovn_datapath *od)
return;
}
- if (od->n_l3dgw_ports > 1) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
- VLOG_WARN_RL(&rl, "NAT is configured on logical router %s, which has %"
- PRIuSIZE" distributed gateway ports. NAT is not supported"
- " yet when there is more than one distributed gateway "
- "port on the router.",
- od->nbr->name, od->n_l3dgw_ports);
- return;
- }
-
od->nat_entries = xmalloc(od->nbr->n_nat * sizeof *od->nat_entries);
for (size_t i = 0; i < od->nbr->n_nat; i++) {
@@ -1631,6 +1621,49 @@ is_cr_port(const struct ovn_port *op)
return op->l3dgw_port;
}
+/* Checks if the IP address (assumed valid) represented by string 'address' is
+ * in one of the networks of the logical router port 'op'. */
+static bool
+ip_in_lrp_networks(const struct ovn_port *op, const char *address) {
+ ovs_be32 ip, mask;
+ struct in6_addr ipv6, mask_v6;
+
+ char *error = ip_parse_masked(address, &ip, &mask);
+ bool is_v6 = false;
+
+ if (error || mask != OVS_BE32_MAX) {
+ free(error);
+ ipv6_parse_masked(address, &ipv6, &mask_v6);
+ is_v6 = true;
+ }
+
+ struct lport_addresses lrp_networks;
+ extract_lrp_networks(op->nbrp, &lrp_networks);
+
+ bool ip_in_net = false;
+ if (is_v6) {
+ for (int i = 0; i < lrp_networks.n_ipv6_addrs; i++) {
+ struct ipv6_netaddr *lrp6_addr = &(lrp_networks.ipv6_addrs[i]);
+ struct in6_addr ip6_mask = ipv6_addr_bitand(&lrp6_addr->mask,
+ &ipv6);
+
+ if (ipv6_addr_equals(&ip6_mask, &(lrp6_addr->network))) {
+ ip_in_net = true;
+ }
+ }
+ } else {
+ for (int i = 0; i < lrp_networks.n_ipv4_addrs; i++) {
+ struct ipv4_netaddr *lrp4_addr = &(lrp_networks.ipv4_addrs[i]);
+
+ if ((ip & lrp4_addr->mask) == lrp4_addr->network) {
+ ip_in_net = true;
+ }
+ }
+ }
+ destroy_lport_addresses(&lrp_networks);
+ return ip_in_net;
+}
+
static void
destroy_routable_addresses(struct ovn_port_routable_addresses *ra)
{
@@ -2705,8 +2738,9 @@ join_logical_ports(struct northd_input *input_data,
* port, followed by 'is_chassis_resident("LPORT_NAME")', where the
* LPORT_NAME is the name of the L3 redirect port or the name of the
* logical_port specified in a NAT rule. These strings include the
- * external IP addresses of all NAT rules defined on that router, and all
- * of the IP addresses used in load balancer VIPs defined on that router.
+ * external IP addresses of NAT rules defined on that router which are in the
+ * same network as the router port 'op', and all of the IP addresses used in
+ * load balancer VIPs defined on that router.
*
* The caller must free each of the n returned strings with free(),
* and must free the returned array when it is no longer needed. */
@@ -2717,8 +2751,7 @@ get_nat_addresses(const struct ovn_port *op, size_t *n,
bool routable_only)
struct eth_addr mac;
if (!op || !op->nbrp || !op->od || !op->od->nbr
|| (!op->od->nbr->n_nat && !op->od->has_lb_vip)
- || !eth_addr_from_string(op->nbrp->mac, &mac)
- || op->od->n_l3dgw_ports > 1) {
+ || !eth_addr_from_string(op->nbrp->mac, &mac)) {
*n = n_nats;
return NULL;
}
@@ -2747,6 +2780,10 @@ get_nat_addresses(const struct ovn_port *op, size_t *n,
bool routable_only)
continue;
}
+ if (!ip_in_lrp_networks(op, nat->external_ip)) {
+ continue;
+ }
+
/* Determine whether this NAT rule satisfies the conditions for
* distributed NAT processing. */
if (op->od->n_l3dgw_ports && !strcmp(nat->type, "dnat_and_snat")
@@ -2815,9 +2852,9 @@ get_nat_addresses(const struct ovn_port *op, size_t *n,
bool routable_only)
if (central_ip_address) {
/* Gratuitous ARP for centralized NAT rules on distributed gateway
* ports should be restricted to the gateway chassis. */
- if (op->od->n_l3dgw_ports) {
+ if (is_l3dgw_port(op)) {
ds_put_format(&c_addresses, " is_chassis_resident(%s)",
- op->od->l3dgw_ports[0]->cr_port->json_key);
+ op->cr_port->json_key);
}
addresses[n_nats++] = ds_steal_cstr(&c_addresses);
@@ -3446,9 +3483,11 @@ ovn_port_update_sbrec(struct northd_input *input_data,
}
if (op->peer->od->n_l3dgw_ports) {
+ const struct ovn_port *l3dgw_port = (
+ is_l3dgw_port(op->peer) ? op->peer
+ :
op->peer->od->l3dgw_ports[0]);
ds_put_format(&garp_info, " is_chassis_resident(%s)",
- op->peer->od->l3dgw_ports[0]
- ->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
n_nats++;
@@ -10212,6 +10251,12 @@ build_lrouter_port_nat_arp_nd_flow(struct ovn_port *op,
const struct nbrec_nat *nat = nat_entry->nb;
struct ds match = DS_EMPTY_INITIALIZER;
+ /* ARP/ND should be sent from router port that is in the same subnet as
+ * the NAT external IP. */
+ if (!ip_in_lrp_networks(op, nat->external_ip)) {
+ return;
+ }
+
/* Mac address to use when replying to ARP/NS. */
const char *mac_s = REG_INPORT_ETH_ADDR;
struct eth_addr mac;
@@ -10235,10 +10280,9 @@ build_lrouter_port_nat_arp_nd_flow(struct ovn_port *op,
* upstream MAC learning points to the gateway chassis.
* Also need to avoid generation of multiple ARP responses
* from different chassis. */
- if (op->od->n_l3dgw_ports) {
- ds_put_format(&match, "is_chassis_resident(%s)",
- op->od->l3dgw_ports[0]->cr_port->json_key);
- }
+ ovs_assert(is_l3dgw_port(op));
+ ds_put_format(&match, "is_chassis_resident(%s)",
+ op->cr_port->json_key);
}
/* Respond to ARP/NS requests on the chassis that binds the gw
@@ -11925,7 +11969,7 @@ build_ipv6_input_flows_for_lrouter_port(
struct ds *match, struct ds *actions,
const struct shash *meter_groups)
{
- if (op->nbrp && (!op->l3dgw_port)) {
+ if (op->nbrp && !is_cr_port(op)) {
/* No ingress packets are accepted on a chassisredirect
* port, so no need to program flows for that port. */
if (op->lrp_networks.n_ipv6_addrs) {
@@ -12054,7 +12098,7 @@ build_ipv6_input_flows_for_lrouter_port(
ds_clear(match);
ds_clear(actions);
ds_clear(&ip_ds);
- if (op->od->n_l3dgw_ports && op->od->l3dgw_ports[0] == op) {
+ if (is_l3dgw_port(op)) {
ds_put_cstr(&ip_ds, "ip6.dst <-> ip6.src");
} else {
ds_put_format(&ip_ds, "ip6.dst = ip6.src; ip6.src = %s",
@@ -12144,7 +12188,7 @@ build_lrouter_ipv4_ip_input(struct ovn_port *op,
{
/* No ingress packets are accepted on a chassisredirect
* port, so no need to program flows for that port. */
- if (op->nbrp && (!op->l3dgw_port)) {
+ if (op->nbrp && !is_cr_port(op)) {
if (op->lrp_networks.n_ipv4_addrs) {
/* L3 admission control: drop packets that originate from an
* IPv4 address owned by the router or a broadcast address
@@ -12186,7 +12230,7 @@ build_lrouter_ipv4_ip_input(struct ovn_port *op,
ds_clear(match);
ds_clear(actions);
ds_clear(&ip_ds);
- if (op->od->n_l3dgw_ports && op->od->l3dgw_ports[0] == op) {
+ if (is_l3dgw_port(op)) {
ds_put_cstr(&ip_ds, "ip4.dst <-> ip4.src");
} else {
ds_put_format(&ip_ds, "ip4.dst = ip4.src; ip4.src = %s",
@@ -12431,7 +12475,8 @@ build_lrouter_ipv4_ip_input(struct ovn_port *op,
static void
build_lrouter_in_unsnat_flow(struct hmap *lflows, struct ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
- struct ds *actions, bool distributed, bool is_v6)
+ struct ds *actions, bool distributed, bool is_v6,
+ struct ovn_port *l3dgw_port)
{
/* Ingress UNSNAT table: It is for already established connections'
* reverse traffic. i.e., SNAT has already been done in egress
@@ -12470,12 +12515,12 @@ build_lrouter_in_unsnat_flow(struct hmap *lflows,
struct ovn_datapath *od,
ds_clear(actions);
ds_put_format(match, "ip && ip%s.dst == %s && inport == %s && "
"flags.loopback == 0", is_v6 ? "6" : "4",
- nat->external_ip, od->l3dgw_ports[0]->json_key);
+ nat->external_ip, l3dgw_port->json_key);
if (!distributed && od->n_l3dgw_ports) {
/* Flows for NAT rules that are centralized are only
* programmed on the gateway chassis. */
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
if (!strcmp(nat->type, "dnat_and_snat") && stateless) {
@@ -12495,12 +12540,12 @@ build_lrouter_in_unsnat_flow(struct hmap *lflows,
struct ovn_datapath *od,
ds_put_format(match, "ip && ip%s.dst == %s && inport == %s && "
"flags.loopback == 1 && flags.use_snat_zone == 1",
is_v6 ? "6" : "4", nat->external_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
if (!distributed && od->n_l3dgw_ports) {
/* Flows for NAT rules that are centralized are only
* programmed on the gateway chassis. */
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
ds_put_cstr(actions, "ct_snat;");
ovn_lflow_add_with_hint(lflows, od, S_ROUTER_IN_UNSNAT,
@@ -12514,7 +12559,8 @@ static void
build_lrouter_in_dnat_flow(struct hmap *lflows, struct ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
struct ds *actions, bool distributed,
- ovs_be32 mask, bool is_v6)
+ ovs_be32 mask, bool is_v6,
+ struct ovn_port *l3dgw_port)
{
/* Ingress DNAT table: Packets enter the pipeline with destination
* IP address that needs to be DNATted from a external IP address
@@ -12566,12 +12612,12 @@ build_lrouter_in_dnat_flow(struct hmap *lflows,
struct ovn_datapath *od,
ds_clear(match);
ds_put_format(match, "ip && ip%s.dst == %s && inport == %s",
is_v6 ? "6" : "4", nat->external_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
if (!distributed && od->n_l3dgw_ports) {
/* Flows for NAT rules that are centralized are only
* programmed on the gateway chassis. */
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
ds_clear(actions);
if (nat->allowed_ext_ips || nat->exempted_ext_ips) {
@@ -12601,7 +12647,8 @@ static void
build_lrouter_out_undnat_flow(struct hmap *lflows, struct ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
struct ds *actions, bool distributed,
- struct eth_addr mac, bool is_v6)
+ struct eth_addr mac, bool is_v6,
+ struct ovn_port *l3dgw_port)
{
/* Egress UNDNAT table: It is for already established connections'
* reverse traffic. i.e., DNAT has already been done in ingress
@@ -12618,12 +12665,12 @@ build_lrouter_out_undnat_flow(struct hmap *lflows,
struct ovn_datapath *od,
ds_clear(match);
ds_put_format(match, "ip && ip%s.src == %s && outport == %s",
is_v6 ? "6" : "4", nat->logical_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
if (!distributed && od->n_l3dgw_ports) {
/* Flows for NAT rules that are centralized are only
* programmed on the gateway chassis. */
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
ds_clear(actions);
if (distributed) {
@@ -12649,7 +12696,7 @@ static void
build_lrouter_out_is_dnat_local(struct hmap *lflows, struct ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
struct ds *actions, bool distributed,
- bool is_v6)
+ bool is_v6, struct ovn_port *l3dgw_port)
{
/* Note that this only applies for NAT on a distributed router.
*/
@@ -12664,7 +12711,7 @@ build_lrouter_out_is_dnat_local(struct hmap *lflows,
struct ovn_datapath *od,
ds_put_format(match, "is_chassis_resident(\"%s\")", nat->logical_port);
} else {
ds_put_format(match, "is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
ds_clear(actions);
@@ -12680,7 +12727,8 @@ build_lrouter_out_snat_flow(struct hmap *lflows, struct
ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
struct ds *actions, bool distributed,
struct eth_addr mac, ovs_be32 mask,
- int cidr_bits, bool is_v6)
+ int cidr_bits, bool is_v6,
+ struct ovn_port *l3dgw_port)
{
/* Egress SNAT table: Packets enter the egress pipeline with
* source ip address that needs to be SNATted to a external ip
@@ -12727,7 +12775,7 @@ build_lrouter_out_snat_flow(struct hmap *lflows, struct
ovn_datapath *od,
ds_clear(match);
ds_put_format(match, "ip && ip%s.src == %s && outport == %s",
is_v6 ? "6" : "4", nat->logical_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
if (od->n_l3dgw_ports) {
if (distributed) {
ovs_assert(nat->logical_port);
@@ -12739,7 +12787,7 @@ build_lrouter_out_snat_flow(struct hmap *lflows, struct
ovn_datapath *od,
* programmed on the gateway chassis. */
priority += 128;
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
}
}
ds_clear(actions);
@@ -12798,13 +12846,13 @@ build_lrouter_ingress_nat_check_pkt_len(struct hmap
*lflows,
const struct nbrec_nat *nat,
struct ovn_datapath *od, bool is_v6,
struct ds *match, struct ds *actions,
- int mtu,
+ int mtu, struct ovn_port *l3dgw_port,
const struct shash *meter_groups)
{
ds_clear(match);
ds_put_format(match, "inport == %s && "REGBIT_PKT_LARGER
" && "REGBIT_EGRESS_LOOPBACK" == 0",
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
ds_clear(actions);
if (!is_v6) {
@@ -12825,7 +12873,7 @@ build_lrouter_ingress_nat_check_pkt_len(struct hmap
*lflows,
"outport = %s; flags.loopback = 1; output; };",
nat->external_mac,
nat->external_ip,
- mtu, od->l3dgw_ports[0]->json_key);
+ mtu, l3dgw_port->json_key);
ovn_lflow_add_with_hint__(lflows, od, S_ROUTER_IN_IP_INPUT, 160,
ds_cstr(match), ds_cstr(actions),
NULL,
@@ -12852,7 +12900,7 @@ build_lrouter_ingress_nat_check_pkt_len(struct hmap
*lflows,
"outport = %s; flags.loopback = 1; output; };",
nat->external_mac,
nat->external_ip,
- mtu, od->l3dgw_ports[0]->json_key);
+ mtu, l3dgw_port->json_key);
ovn_lflow_add_with_hint__(lflows, od, S_ROUTER_IN_IP_INPUT, 160,
ds_cstr(match), ds_cstr(actions),
NULL,
@@ -12869,13 +12917,14 @@ build_lrouter_ingress_flow(struct hmap *lflows,
struct ovn_datapath *od,
const struct nbrec_nat *nat, struct ds *match,
struct ds *actions, struct eth_addr mac,
bool distributed, bool is_v6,
+ struct ovn_port *l3dgw_port,
const struct shash *meter_groups)
{
if (od->n_l3dgw_ports && !strcmp(nat->type, "snat")) {
ds_clear(match);
ds_put_format(
match, "inport == %s && %s == %s",
- od->l3dgw_ports[0]->json_key,
+ l3dgw_port->json_key,
is_v6 ? "ip6.src" : "ip4.src", nat->external_ip);
ovn_lflow_add_with_hint(lflows, od, S_ROUTER_IN_IP_INPUT,
120, ds_cstr(match), "next;",
@@ -12891,24 +12940,24 @@ build_lrouter_ingress_flow(struct hmap *lflows,
struct ovn_datapath *od,
* This will save us from having to match on inport further
* down in the pipeline.
*/
- int gw_mtu = smap_get_int(&od->l3dgw_ports[0]->nbrp->options,
+ int gw_mtu = smap_get_int(&l3dgw_port->nbrp->options,
"gateway_mtu", 0);
ds_clear(match);
ds_put_format(match,
"eth.dst == "ETH_ADDR_FMT" && inport == %s"
" && is_chassis_resident(\"%s\")",
ETH_ADDR_ARGS(mac),
- od->l3dgw_ports[0]->json_key,
+ l3dgw_port->json_key,
nat->logical_port);
- build_gateway_mtu_flow(lflows, od->l3dgw_ports[0],
+ build_gateway_mtu_flow(lflows, l3dgw_port,
S_ROUTER_IN_ADMISSION, 50, 55,
match, actions, &nat->header_,
REG_INPORT_ETH_ADDR " = %s; next;",
- od->l3dgw_ports[0]->lrp_networks.ea_s);
+ l3dgw_port->lrp_networks.ea_s);
if (gw_mtu) {
build_lrouter_ingress_nat_check_pkt_len(lflows, nat, od, is_v6,
match, actions, gw_mtu,
- meter_groups);
+ l3dgw_port, meter_groups);
}
}
}
@@ -12916,7 +12965,8 @@ build_lrouter_ingress_flow(struct hmap *lflows, struct
ovn_datapath *od,
static int
lrouter_check_nat_entry(struct ovn_datapath *od, const struct nbrec_nat *nat,
ovs_be32 *mask, bool *is_v6, int *cidr_bits,
- struct eth_addr *mac, bool *distributed)
+ struct eth_addr *mac, bool *distributed,
+ struct ovn_port **nat_l3dgw_port)
{
struct in6_addr ipv6, mask_v6, v6_exact = IN6ADDR_EXACT_INIT;
ovs_be32 ip;
@@ -12950,6 +13000,24 @@ lrouter_check_nat_entry(struct ovn_datapath *od, const
struct nbrec_nat *nat,
*is_v6 = true;
}
+ /* Get the l3dgw port (if present) corresponding to the external IP
+ * of the NAT rule. */
+ *nat_l3dgw_port = NULL;
+
+ for (size_t i = 0; i < od->n_l3dgw_ports; i++) {
+ if (ip_in_lrp_networks(od->l3dgw_ports[i], nat->external_ip)) {
+ *nat_l3dgw_port = od->l3dgw_ports[i];
+ }
+ }
+
+ if (od->n_l3dgw_ports && *nat_l3dgw_port == NULL) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
+ VLOG_WARN_RL(&rl, "Could not map NAT external ip: %s to a "
+ "distributed gateway port in router "UUID_FMT"",
+ nat->external_ip, UUID_ARGS(&od->key));
+ return -EINVAL;
+ }
+
/* Check the validity of nat->logical_ip. 'logical_ip' can
* be a subnet when the type is "snat". */
if (*is_v6) {
@@ -13049,7 +13117,7 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, 120, "nd_ns", "next;");
/* NAT rules are only valid on Gateway routers and routers with
- * l3dgw_port (router has a port with gateway chassis
+ * l3dgw_ports (router has port(s) with gateway chassis
* specified). */
if (!od->is_gw_router && !od->n_l3dgw_ports) {
return;
@@ -13068,18 +13136,19 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
bool is_v6, distributed;
ovs_be32 mask;
int cidr_bits;
+ struct ovn_port *l3dgw_port;
if (lrouter_check_nat_entry(od, nat, &mask, &is_v6, &cidr_bits,
- &mac, &distributed) < 0) {
+ &mac, &distributed, &l3dgw_port) < 0) {
continue;
}
/* S_ROUTER_IN_UNSNAT */
build_lrouter_in_unsnat_flow(lflows, od, nat, match, actions,
distributed,
- is_v6);
+ is_v6, l3dgw_port);
/* S_ROUTER_IN_DNAT */
build_lrouter_in_dnat_flow(lflows, od, nat, match, actions,
distributed,
- mask, is_v6);
+ mask, is_v6, l3dgw_port);
/* ARP resolve for NAT IPs. */
if (od->is_gw_router) {
@@ -13092,14 +13161,14 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
ds_clear(match);
ds_put_format(
match, "outport == %s && %s == %s",
- od->l3dgw_ports[0]->json_key,
+ l3dgw_port->json_key,
is_v6 ? REG_NEXT_HOP_IPV6 : REG_NEXT_HOP_IPV4,
nat->external_ip);
ds_clear(actions);
ds_put_format(
actions, "eth.dst = %s; next;",
distributed ? nat->external_mac :
- od->l3dgw_ports[0]->lrp_networks.ea_s);
+ l3dgw_port->lrp_networks.ea_s);
ovn_lflow_add_with_hint(lflows, od,
S_ROUTER_IN_ARP_RESOLVE,
100, ds_cstr(match),
@@ -13111,18 +13180,19 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
/* S_ROUTER_OUT_DNAT_LOCAL */
build_lrouter_out_is_dnat_local(lflows, od, nat, match, actions,
- distributed, is_v6);
+ distributed, is_v6, l3dgw_port);
/* S_ROUTER_OUT_UNDNAT */
build_lrouter_out_undnat_flow(lflows, od, nat, match, actions,
distributed,
- mac, is_v6);
+ mac, is_v6, l3dgw_port);
/* S_ROUTER_OUT_SNAT */
build_lrouter_out_snat_flow(lflows, od, nat, match, actions,
distributed,
- mac, mask, cidr_bits, is_v6);
+ mac, mask, cidr_bits, is_v6, l3dgw_port);
/* S_ROUTER_IN_ADMISSION - S_ROUTER_IN_IP_INPUT */
- build_lrouter_ingress_flow(lflows, od, nat, match, actions,
- mac, distributed, is_v6, meter_groups);
+ build_lrouter_ingress_flow(lflows, od, nat, match, actions, mac,
+ distributed, is_v6, l3dgw_port,
+ meter_groups);
/* Ingress Gateway Redirect Table: For NAT on a distributed
* router, add flows that are specific to a NAT rule. These
@@ -13139,7 +13209,7 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
ds_put_format(match,
"ip%s.src == %s && outport == %s",
is_v6 ? "6" : "4", nat->logical_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
/* Add a rule to drop traffic from a distributed NAT if
* the virtual port has not claimed yet becaused otherwise
* the traffic will be centralized misconfiguring the TOR switch.
@@ -13172,10 +13242,10 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath
*od, struct hmap *lflows,
ds_put_format(match, "ip%s.dst == %s && outport == %s",
is_v6 ? "6" : "4",
nat->external_ip,
- od->l3dgw_ports[0]->json_key);
+ l3dgw_port->json_key);
if (!distributed) {
ds_put_format(match, " && is_chassis_resident(%s)",
- od->l3dgw_ports[0]->cr_port->json_key);
+ l3dgw_port->cr_port->json_key);
} else {
ds_put_format(match, " && is_chassis_resident(\"%s\")",
nat->logical_port);
diff --git a/northd/ovn-northd.8.xml b/northd/ovn-northd.8.xml
index 79f35bc16..42894a413 100644
--- a/northd/ovn-northd.8.xml
+++ b/northd/ovn-northd.8.xml
@@ -2888,7 +2888,8 @@ icmp6 {
<code>ip &&
ip6.dst == <var>B</var> && inport == <var>GW</var>
&& flags.loopback == 0</code>
- where <var>GW</var> is the logical router gateway port, with an
+ where <var>GW</var> is the logical router gateway port
+ corresponding to IP <var>B</var>, with an
action <code>ct_snat_in_czone;</code> to unSNAT in the common
zone. If the NAT rule is of type dnat_and_snat and has
<code>stateless=true</code> in the options, then the action
@@ -2913,7 +2914,8 @@ icmp6 {
ip6.dst == <var>B</var> && inport == <var>GW</var>
&& flags.loopback == 0 &&
flags.use_snat_zone == 1</code>
- where <var>GW</var> is the logical router gateway port, with an
+ where <var>GW</var> is the logical router gateway port
+ corresponding to IP <var>B</var>, with an
action <code>ct_snat;</code> to unSNAT in the snat zone. If the
NAT rule is of type dnat_and_snat and has
<code>stateless=true</code> in the options, then the action
@@ -3194,9 +3196,10 @@ icmp6 {
to change the destination IP address of a packet from <var>A</var> to
<var>B</var>, a priority-100 flow matches <code>ip &&
ip4.dst == <var>B</var> && inport == <var>GW</var></code>,
- where <var>GW</var> is the logical router gateway port, with an
- action <code>ct_dnat(<var>B</var>);</code>. The match will
- include <code>ip6.dst == <var>B</var></code> in the IPv6 case.
+ where <var>GW</var> is the logical router gateway port corresponding
+ to IP <var>A</var>, with an action
+ <code>ct_dnat(<var>B</var>);</code>. The match will include
+ <code>ip6.dst == <var>B</var></code> in the IPv6 case.
If the NAT rule is of type dnat_and_snat and has
<code>stateless=true</code> in the options, then the action
would be <code>ip4/6.dst=(<var>B</var>)</code>.
@@ -4006,10 +4009,11 @@ icmp6 {
flow with match <code>ip4.src == <var>B</var> &&
outport == <var>GW</var></code> &&
is_chassis_resident(<var>P</var>), where <var>GW</var> is
- the logical router distributed gateway port and <var>P</var>
- is the NAT logical port. IP traffic matching the above rule
- will be managed locally setting <code>reg1</code> to <var>C</var>
- and <code>eth.src</code> to <var>D</var>, where <var>C</var> is NAT
+ the logical router distributed gateway port corresponding to the
+ NAT external IP and <var>P</var> is the NAT logical port. IP traffic
+ matching the above rule will be managed locally setting
+ <code>reg1</code> to <var>C</var> and
+ <code>eth.src</code> to <var>D</var>, where <var>C</var> is NAT
external ip and <var>D</var> is NAT external mac.
</li>
@@ -4476,8 +4480,9 @@ nd_ns {
outport == <var>GW</var> &&
is_chassis_resident(<var>P</var>)</code>, where <var>E</var> is the
external IP address specified in the NAT rule, <var>GW</var>
- is the logical router distributed gateway port. For dnat_and_snat
- NAT rule, <var>P</var> is the logical port specified in the NAT rule.
+ is the logical router distributed gateway port corresponding to the
+ NAT external IP. For dnat_and_snat NAT rule, <var>P</var> is the
+ logical port specified in the NAT rule.
If <ref column="logical_port"
table="NAT" db="OVN_Northbound"/> column of
<ref table="NAT" db="OVN_Northbound"/> table is NOT set, then
diff --git a/ovn-architecture.7.xml b/ovn-architecture.7.xml
index ef8d669a2..a48757761 100644
--- a/ovn-architecture.7.xml
+++ b/ovn-architecture.7.xml
@@ -742,9 +742,9 @@
<p>
A logical router can have multiple distributed gateway ports, each
- connecting different external networks. However, some features, such as NAT
- and load balancers, are not supported yet for logical routers with more
- than one distributed gateway port configured.
+ connecting different external networks. Load balancing is not yet
+ supported for logical routers with more than one distributed gateway
+ port configured.
</p>
<h4>Physical VLAN MTU Issues</h4>
diff --git a/ovn-nb.xml b/ovn-nb.xml
index 6a6972856..b0226973c 100644
--- a/ovn-nb.xml
+++ b/ovn-nb.xml
@@ -2552,8 +2552,8 @@
<p>
There can be more than one distributed gateway ports configured
on each logical router, each connecting to different L2 segments.
- However, features such as NAT and load-balancer are not supported
- on logical routers with more than one distributed gateway ports.
+ Load-balancing is not yet supported on logical routers with more
+ than one distributed gateway ports.
</p>
<p>
diff --git a/tests/ovn-nbctl.at b/tests/ovn-nbctl.at
index a43a1ce8f..b914abc82 100644
--- a/tests/ovn-nbctl.at
+++ b/tests/ovn-nbctl.at
@@ -745,7 +745,45 @@ AT_CHECK([ovn-nbctl lr-nat-update-ext-ip lr0 snat
192.168.16 allowed_range], [1]
[ovn-nbctl: 192.168.16: Invalid IP address or CIDR
])
-AT_CHECK([ovn-nbctl lr-nat-del lr0])])
+AT_CHECK([ovn-nbctl lr-nat-del lr0])
+
+AT_CHECK([ovn-nbctl lrp-add lr0 lrp0 00:00:00:01:02:03 192.168.1.1/24])
+AT_CHECK([ovn-nbctl lrp-add lr0 lrp1 00:00:00:01:02:04 172.64.1.1/24])
+AT_CHECK([ovn-nbctl lrp-set-gateway-chassis lrp0 chassis1])
+AT_CHECK([ovn-nbctl lrp-set-gateway-chassis lrp1 chassis2])
+
+AT_CHECK([ovn-nbctl lr-nat-add lr0 snat 192.168.1.10 20.0.0.10])
+AT_CHECK([ovn-nbctl lr-nat-add lr0 snat 172.64.1.10 20.0.0.10])
+AT_CHECK([ovn-nbctl lr-nat-add lr0 snat 192.168.1.20 20.0.0.10], [1], [],
+[ovn-nbctl: a NAT with this type (snat) and logical_ip (20.0.0.10) already
exists
+])
+AT_CHECK([ovn-nbctl lr-nat-add lr0 dnat 172.64.1.20 20.0.0.20])
+AT_CHECK([ovn-nbctl lr-nat-add lr0 dnat 172.64.1.20 20.0.0.30], [1], [],
+[ovn-nbctl: a NAT with this type (dnat) and external_ip (172.64.1.20) already
exists
+])
+AT_CHECK([ovn-nbctl lr-nat-list lr0], [0], [dnl
+TYPE EXTERNAL_IP EXTERNAL_PORT LOGICAL_IP
EXTERNAL_MAC LOGICAL_PORT
+dnat 172.64.1.20 20.0.0.20
+snat 172.64.1.10 20.0.0.10
+snat 192.168.1.10 20.0.0.10
+])
+AT_CHECK([ovn-nbctl lr-nat-del lr0 snat 172.64.1.10 20.0.0.10])
+AT_CHECK([ovn-nbctl lr-nat-list lr0], [0], [dnl
+TYPE EXTERNAL_IP EXTERNAL_PORT LOGICAL_IP
EXTERNAL_MAC LOGICAL_PORT
+dnat 172.64.1.20 20.0.0.20
+snat 192.168.1.10 20.0.0.10
+])
+AT_CHECK([ovn-nbctl lr-nat-add lr0 snat 172.64.1.10 20.0.0.10])
+AT_CHECK([ovn-nbctl lr-nat-del lr0 snat 20.0.0.10])
+AT_CHECK([ovn-nbctl lr-nat-list lr0], [0], [dnl
+TYPE EXTERNAL_IP EXTERNAL_PORT LOGICAL_IP
EXTERNAL_MAC LOGICAL_PORT
+dnat 172.64.1.20 20.0.0.20
+])
+AT_CHECK([ovn-nbctl lr-nat-del lr0 snat 20.0.0.10], [1], [],
+[ovn-nbctl: no matching NAT with the type (snat) and logical_ip (20.0.0.10)
+])
+AT_CHECK([ovn-nbctl lr-nat-del lr0])
+])
dnl ---------------------------------------------------------------------
diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index 652903761..80da5e37c 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -847,7 +847,7 @@ ovn_start
ovn-sbctl chassis-add gw1 geneve 127.0.0.1
ovn-nbctl lr-add R1
-ovn-nbctl lrp-add R1 R1-S1 02:ac:10:01:00:01 172.16.1.1/24
+ovn-nbctl lrp-add R1 R1-S1 02:ac:10:01:00:01 172.16.1.1/24 3000::a/64
ovn-nbctl ls-add S1
ovn-nbctl lsp-add S1 S1-R1
@@ -888,13 +888,13 @@ ovn-nbctl lr-nat-del R1 dnat_and_snat 172.16.1.1
echo
echo "IPv6: stateful"
-ovn-nbctl --wait=sb lr-nat-add R1 dnat_and_snat fd01::1 fd11::2
+ovn-nbctl --wait=sb lr-nat-add R1 dnat_and_snat 3000::c 1000::3
check_flow_match_sets 3 4 2 0 0 0 0
-ovn-nbctl lr-nat-del R1 dnat_and_snat fd01::1
+ovn-nbctl lr-nat-del R1 dnat_and_snat 3000::c
echo
echo "IPv6: stateless"
-ovn-nbctl --wait=sb --stateless lr-nat-add R1 dnat_and_snat fd01::1 fd11::2
+ovn-nbctl --wait=sb --stateless lr-nat-add R1 dnat_and_snat 3000::c 1000::3
check_flow_match_sets 2 0 0 0 0 2 2
AT_CLEANUP
@@ -4234,18 +4234,16 @@ check ovn-nbctl lsp-set-type lrp1-attachment router
check ovn-nbctl lsp-set-addresses lrp1-attachment 00:00:00:00:ff:02
check ovn-nbctl lsp-set-options lrp1-attachment router-port=lrp1
-check ovn-nbctl lr-nat-add lr0 dnat 42.42.42.42 192.168.0.2
+check ovn-nbctl lr-nat-add lr0 dnat 11.0.0.42 192.168.0.2
check ovn-nbctl --wait=sb sync
-ovn-trace --minimal 'inport == "sw1-port1" && eth.src == 50:54:00:00:00:03 &&
eth.dst == 00:00:00:00:ff:02 && ip4.dst == 42.42.42.42 && ip4.src == 11.0.0.2
&& ip.ttl == 64'
-
-AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip4.dst == 42.42.42.42 &&
ip4.src == 11.0.0.2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [0],
[ignore])
+AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip4.dst == 11.0.0.42 &&
ip4.src == 11.0.0.2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [0],
[ignore])
dnl If we remove the DNAT entry we will be unable to trace to the DNAT address
-check ovn-nbctl lr-nat-del lr0 dnat 42.42.42.42
+check ovn-nbctl lr-nat-del lr0 dnat 11.0.0.42
check ovn-nbctl --wait=sb sync
-AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip4.dst == 42.42.42.42 &&
ip4.src == 11.0.0.2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [1],
[ignore])
+AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip4.dst == 11.0.0.42 &&
ip4.src == 11.0.0.2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [1],
[ignore])
AT_CLEANUP
])
@@ -4275,16 +4273,16 @@ check ovn-nbctl lsp-set-type lrp1-attachment router
check ovn-nbctl lsp-set-addresses lrp1-attachment 00:00:00:00:ff:02
check ovn-nbctl lsp-set-options lrp1-attachment router-port=lrp1
-check ovn-nbctl lr-nat-add lr0 dnat fd42::42 fd68::2
+check ovn-nbctl lr-nat-add lr0 dnat fd11::42 fd68::2
check ovn-nbctl --wait=sb sync
-AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip6.dst == fd42::42 &&
ip6.src == fd11::2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [0],
[ignore])
+AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip6.dst == fd11::42 &&
ip6.src == fd11::2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [0],
[ignore])
dnl If we remove the DNAT entry we will be unable to trace to the DNAT address
-check ovn-nbctl lr-nat-del lr0 dnat fd42::42
+check ovn-nbctl lr-nat-del lr0 dnat fd11::42
check ovn-nbctl --wait=sb sync
-AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip6.dst == fd42::42 &&
ip6.src == fd11::2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [1],
[ignore])
+AT_CHECK([ovn-trace --minimal 'inport == "sw1-port1" && eth.src ==
50:54:00:00:00:03 && eth.dst == 00:00:00:00:ff:02 && ip6.dst == fd11::42 &&
ip6.src == fd11::2 && ip.ttl == 64' | grep "output(\"sw0-port1\")"], [1],
[ignore])
AT_CLEANUP
])
@@ -5890,3 +5888,177 @@ AT_CHECK([grep -e "(lr_in_ip_routing ).*outport"
lr0flows | sed 's/table=../ta
AT_CLEANUP
])
+
+AT_SETUP([ovn-northd -- lr multiple gw ports NAT])
+AT_KEYWORDS([multiple-l3dgw-ports])
+ovn_start
+
+# Logical network:
+# 1 Logical Router, 3 bridged Logical Switches,
+# 1 gateway chassis attached to each corresponding LRP.
+#
+# | S1 (gw1)
+# |
+# ls ---- DR -- S3 (gw3)
+# (20.0.0.0/24) |
+# | S2 (gw2)
+#
+# Validate SNAT, DNAT and DNAT_AND_SNAT behavior with multiple
+# distributed gateway LRPs.
+
+check ovn-sbctl chassis-add gw1 geneve 127.0.0.1
+check ovn-sbctl chassis-add gw2 geneve 128.0.0.1
+check ovn-sbctl chassis-add gw3 geneve 129.0.0.1
+
+check ovn-nbctl lr-add DR
+check ovn-nbctl lrp-add DR DR-S1 02:ac:10:01:00:01 172.16.1.1/24
+check ovn-nbctl lrp-add DR DR-S2 03:ac:10:01:00:01 10.0.0.1/24
+check ovn-nbctl lrp-add DR DR-S3 04:ac:10:01:00:01 192.168.0.1/24
+check ovn-nbctl lrp-add DR DR-ls 05:ac:10:01:00:01 20.0.0.1/24
+
+check ovn-nbctl ls-add S1
+check ovn-nbctl lsp-add S1 S1-DR
+check ovn-nbctl lsp-set-type S1-DR router
+check ovn-nbctl lsp-set-addresses S1-DR router
+check ovn-nbctl --wait=sb lsp-set-options S1-DR router-port=DR-S1
+
+check ovn-nbctl ls-add S2
+check ovn-nbctl lsp-add S2 S2-DR
+check ovn-nbctl lsp-set-type S2-DR router
+check ovn-nbctl lsp-set-addresses S2-DR router
+check ovn-nbctl --wait=sb lsp-set-options S2-DR router-port=DR-S2
+
+check ovn-nbctl ls-add S3
+check ovn-nbctl lsp-add S3 S3-DR
+check ovn-nbctl lsp-set-type S3-DR router
+check ovn-nbctl lsp-set-addresses S3-DR router
+check ovn-nbctl --wait=sb lsp-set-options S3-DR router-port=DR-S3
+
+check ovn-nbctl ls-add ls
+check ovn-nbctl lsp-add ls ls-DR
+check ovn-nbctl lsp-set-type ls-DR router
+check ovn-nbctl lsp-set-addresses ls-DR router
+check ovn-nbctl --wait=sb lsp-set-options ls-DR router-port=DR-ls
+
+check ovn-nbctl lrp-set-gateway-chassis DR-S1 gw1
+check ovn-nbctl lrp-set-gateway-chassis DR-S2 gw2
+check ovn-nbctl lrp-set-gateway-chassis DR-S3 gw3
+
+check ovn-nbctl --wait=sb sync
+
+# Configure SNAT
+check ovn-nbctl lr-nat-add DR snat 172.16.1.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR snat 10.0.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR snat 192.168.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR snat 192.168.123.10 20.0.0.10
+
+ovn-sbctl dump-flows DR > lrflows
+AT_CAPTURE_FILE([lrflows])
+
+check_lr_in_arp_nat_flows() {
+ AT_CHECK([grep lr_in_ip_input lrflows | grep arp | grep -e 172.16.1.10 -e
10.0.0.10 -e 192.168.0.10 -e 192.168.123.10 | sed 's/table=../table=??/' |
sort], [0], [dnl
+ table=??(lr_in_ip_input ), priority=90 , match=(arp.op == 1 && arp.tpa
== 10.0.0.10), action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op = 2;
/* ARP reply */ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <->
arp.spa; outport = inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=90 , match=(arp.op == 1 && arp.tpa
== 172.16.1.10), action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op =
2; /* ARP reply */ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <->
arp.spa; outport = inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=90 , match=(arp.op == 1 && arp.tpa
== 192.168.0.10), action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op =
2; /* ARP reply */ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <->
arp.spa; outport = inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=90 , match=(arp.op == 1 && arp.tpa
== 192.168.123.10), action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op
= 2; /* ARP reply */ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <->
arp.spa; outport = inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=91 , match=(inport == "DR-S1" &&
arp.op == 1 && arp.tpa == 172.16.1.10), action=(drop;)
+ table=??(lr_in_ip_input ), priority=91 , match=(inport == "DR-S2" &&
arp.op == 1 && arp.tpa == 10.0.0.10), action=(drop;)
+ table=??(lr_in_ip_input ), priority=91 , match=(inport == "DR-S3" &&
arp.op == 1 && arp.tpa == 192.168.0.10), action=(drop;)
+ table=??(lr_in_ip_input ), priority=92 , match=(inport == "DR-S1" &&
arp.op == 1 && arp.tpa == 172.16.1.10 && is_chassis_resident("cr-DR-S1")),
action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op = 2; /* ARP reply
*/ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <-> arp.spa; outport =
inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=92 , match=(inport == "DR-S2" &&
arp.op == 1 && arp.tpa == 10.0.0.10 && is_chassis_resident("cr-DR-S2")),
action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op = 2; /* ARP reply
*/ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <-> arp.spa; outport =
inport; flags.loopback = 1; output;)
+ table=??(lr_in_ip_input ), priority=92 , match=(inport == "DR-S3" &&
arp.op == 1 && arp.tpa == 192.168.0.10 && is_chassis_resident("cr-DR-S3")),
action=(eth.dst = eth.src; eth.src = xreg0[[0..47]]; arp.op = 2; /* ARP reply
*/ arp.tha = arp.sha; arp.sha = xreg0[[0..47]]; arp.tpa <-> arp.spa; outport =
inport; flags.loopback = 1; output;)
+])
+}
+
+check_lr_in_unsnat_flows() {
+ AT_CHECK([grep lr_in_unsnat lrflows | grep ct_snat | sed
's/table=../table=??/' | sort], [0], [dnl
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
10.0.0.10 && inport == "DR-S2" && flags.loopback == 0 &&
is_chassis_resident("cr-DR-S2")), action=(ct_snat_in_czone;)
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
10.0.0.10 && inport == "DR-S2" && flags.loopback == 1 && flags.use_snat_zone ==
1 && is_chassis_resident("cr-DR-S2")), action=(ct_snat;)
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
172.16.1.10 && inport == "DR-S1" && flags.loopback == 0 &&
is_chassis_resident("cr-DR-S1")), action=(ct_snat_in_czone;)
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
172.16.1.10 && inport == "DR-S1" && flags.loopback == 1 && flags.use_snat_zone
== 1 && is_chassis_resident("cr-DR-S1")), action=(ct_snat;)
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
192.168.0.10 && inport == "DR-S3" && flags.loopback == 0 &&
is_chassis_resident("cr-DR-S3")), action=(ct_snat_in_czone;)
+ table=??(lr_in_unsnat ), priority=100 , match=(ip && ip4.dst ==
192.168.0.10 && inport == "DR-S3" && flags.loopback == 1 && flags.use_snat_zone
== 1 && is_chassis_resident("cr-DR-S3")), action=(ct_snat;)
+])
+}
+
+check_lr_out_snat_flows() {
+ AT_CHECK([grep lr_out_snat lrflows | grep ct_snat | sed
's/table=../table=??/' | sort], [0], [dnl
+ table=??(lr_out_snat ), priority=161 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S1" && is_chassis_resident("cr-DR-S1")),
action=(ct_snat_in_czone(172.16.1.10);)
+ table=??(lr_out_snat ), priority=161 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S2" && is_chassis_resident("cr-DR-S2")),
action=(ct_snat_in_czone(10.0.0.10);)
+ table=??(lr_out_snat ), priority=161 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S3" && is_chassis_resident("cr-DR-S3")),
action=(ct_snat_in_czone(192.168.0.10);)
+ table=??(lr_out_snat ), priority=162 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S1" && is_chassis_resident("cr-DR-S1") && reg9[[4]]
== 1), action=(reg9[[4]] = 0; ct_snat(172.16.1.10);)
+ table=??(lr_out_snat ), priority=162 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S2" && is_chassis_resident("cr-DR-S2") && reg9[[4]]
== 1), action=(reg9[[4]] = 0; ct_snat(10.0.0.10);)
+ table=??(lr_out_snat ), priority=162 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S3" && is_chassis_resident("cr-DR-S3") && reg9[[4]]
== 1), action=(reg9[[4]] = 0; ct_snat(192.168.0.10);)
+])
+}
+
+check_lr_in_unsnat_flows
+check_lr_out_snat_flows
+check_lr_in_arp_nat_flows
+
+check ovn-nbctl lr-nat-del DR snat 20.0.0.10
+AT_CHECK([ovn-sbctl dump-flows DR | grep -e lr_in_unsnat -e lr_out_snat | grep
ct_snat | wc -l], [0], [0
+])
+
+# Configure DNAT
+check ovn-nbctl lr-nat-add DR dnat 172.16.1.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat 10.0.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat 192.168.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat 192.168.123.10 20.0.0.10
+
+ovn-sbctl dump-flows DR > lrflows
+AT_CAPTURE_FILE([lrflows])
+
+check_lr_in_dnat_flows() {
+ AT_CHECK([grep lr_in_dnat lrflows | grep ct_dnat | sed
's/table=../table=??/' | sort], [0], [dnl
+ table=??(lr_in_dnat ), priority=100 , match=(ip && ip4.dst ==
10.0.0.10 && inport == "DR-S2" && is_chassis_resident("cr-DR-S2")),
action=(ct_dnat_in_czone(20.0.0.10);)
+ table=??(lr_in_dnat ), priority=100 , match=(ip && ip4.dst ==
172.16.1.10 && inport == "DR-S1" && is_chassis_resident("cr-DR-S1")),
action=(ct_dnat_in_czone(20.0.0.10);)
+ table=??(lr_in_dnat ), priority=100 , match=(ip && ip4.dst ==
192.168.0.10 && inport == "DR-S3" && is_chassis_resident("cr-DR-S3")),
action=(ct_dnat_in_czone(20.0.0.10);)
+])
+}
+
+check_lr_out_undnat_flows() {
+ AT_CHECK([grep lr_out_undnat lrflows | grep ct_dnat | sed
's/table=../table=??/' | sort], [0], [dnl
+ table=??(lr_out_undnat ), priority=100 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S1" && is_chassis_resident("cr-DR-S1")),
action=(ct_dnat_in_czone;)
+ table=??(lr_out_undnat ), priority=100 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S2" && is_chassis_resident("cr-DR-S2")),
action=(ct_dnat_in_czone;)
+ table=??(lr_out_undnat ), priority=100 , match=(ip && ip4.src ==
20.0.0.10 && outport == "DR-S3" && is_chassis_resident("cr-DR-S3")),
action=(ct_dnat_in_czone;)
+])
+}
+
+check_lr_in_dnat_flows
+check_lr_out_undnat_flows
+check_lr_in_arp_nat_flows
+
+check ovn-nbctl lr-nat-del DR dnat 172.16.1.10
+check ovn-nbctl lr-nat-del DR dnat 10.0.0.10
+check ovn-nbctl lr-nat-del DR dnat 192.168.0.10
+check ovn-nbctl lr-nat-del DR dnat 192.168.123.10
+
+AT_CHECK([ovn-sbctl dump-flows DR | grep -e lr_in_dnat -e lr_out_undnat | grep
ct_dnat | wc -l], [0], [0
+])
+
+# Configure DNAT_AND_SNAT
+check ovn-nbctl lr-nat-add DR dnat_and_snat 172.16.1.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat_and_snat 10.0.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat_and_snat 192.168.0.10 20.0.0.10
+check ovn-nbctl lr-nat-add DR dnat_and_snat 192.168.123.10 20.0.0.10
+
+ovn-sbctl dump-flows DR > lrflows
+AT_CAPTURE_FILE([lrflows])
+
+check_lr_in_unsnat_flows
+check_lr_out_snat_flows
+check_lr_in_dnat_flows
+check_lr_out_undnat_flows
+check_lr_in_arp_nat_flows
+
+check ovn-nbctl lr-nat-del DR dnat_and_snat 172.16.1.10
+check ovn-nbctl lr-nat-del DR dnat_and_snat 10.0.0.10
+check ovn-nbctl lr-nat-del DR dnat_and_snat 192.168.0.10
+check ovn-nbctl lr-nat-del DR dnat_and_snat 192.168.123.10
+
+AT_CHECK([ovn-sbctl dump-flows DR | grep -e lr_in_unsnat -e lr_out_snat -e
lr_in_dnat -e lr_out_undnat | grep ct_snat| wc -l], [0], [0
+])
+
+AT_CLEANUP
+])
diff --git a/utilities/ovn-nbctl.8.xml b/utilities/ovn-nbctl.8.xml
index 80a564660..698a7b3b9 100644
--- a/utilities/ovn-nbctl.8.xml
+++ b/utilities/ovn-nbctl.8.xml
@@ -1202,18 +1202,28 @@
</p>
</dd>
- <dt>[<code>--if-exists</code>] <code>lr-nat-del</code> <var>router</var>
[<var>type</var> [<var>ip</var>]]</dt>
+ <dt>[<code>--if-exists</code>] <code>lr-nat-del</code> <var>router</var>
[<var>type</var> [<var>ip</var> [<var>logical_ip</var>]]]</dt>
<dd>
<p>
Deletes NATs from <var>router</var>. If only <var>router</var>
is supplied, all the NATs from the logical router are
deleted. If <var>type</var> is also specified, then all the
NATs that match the <var>type</var> will be deleted from the logical
- router. If all the fields are given, then a single NAT rule
- that matches all the fields will be deleted. When <var>type</var>
- is <code>snat</code>, the <var>ip</var> should be logical_ip.
+ router. If <var>ip</var> is also specified, then NAT rules matching
+ the given fields will be deleted. When <var>type</var> is
+ <code>snat</code>, the <var>ip</var> should be logical_ip.
When <var>type</var> is <code>dnat</code> or
<code>dnat_and_snat</code>, the <var>ip</var> shoud be external_ip.
+ When <var>type</var> is <code>dnat</code> or
+ <code>dnat_and_snat</code>, a single NAT rule is expected to match
+ all the fields but this is not necessarily true when <var>type</var>
+ is <code>snat</code>. To match a single NAT rule of <var>type</var>
+ <code>snat</code> when multiple rules have the same logical_ip,
+ external_ip of the rule also needs to be specified.
+ <var>logical_ip</var> field can only be specified if
+ <var>type</var> is <code>snat</code>. In this case, the <var>ip</var>
+ should be external_ip of the rule and a single NAT rule that
+ matches all the fields will be deleted.
</p>
<p>
diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
index 55b0f5124..bf0d2723b 100644
--- a/utilities/ovn-nbctl.c
+++ b/utilities/ovn-nbctl.c
@@ -381,7 +381,7 @@ NAT commands:\n\
lr-nat-add ROUTER TYPE EXTERNAL_IP LOGICAL_IP [LOGICAL_PORT EXTERNAL_MAC]\n\
[EXTERNAL_PORT_RANGE]\n\
add a NAT to ROUTER\n\
- lr-nat-del ROUTER [TYPE [IP]]\n\
+ lr-nat-del ROUTER [TYPE [IP [LOGICAL_IP]]]\n\
remove NATs from ROUTER\n\
lr-nat-list ROUTER print NATs for ROUTER\n\
\n\
@@ -4482,6 +4482,92 @@ nbctl_lr_route_del(struct ctl_context *ctx)
free(nexthop);
}
+static bool
+is_snat_rule_conflict(const struct nbrec_logical_router *lr,
+ char *new_external_ip, char *old_external_ip, bool is_v6)
+{
+ int num_l3dgw_ports = 0;
+ bool is_conflict = false;
+
+ struct lport_addresses old_external_ip_addr, new_external_ip_addr;
+
+ if (!extract_ip_addresses(new_external_ip, &new_external_ip_addr) ||
+ !extract_ip_addresses(old_external_ip, &old_external_ip_addr)) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_WARN_RL(&rl, "Extract addresses failed.");
+ return true;
+ }
+
+ if (is_v6) {
+ ovs_assert(new_external_ip_addr.n_ipv6_addrs == 1);
+ ovs_assert(old_external_ip_addr.n_ipv6_addrs == 1);
+ } else {
+ ovs_assert(new_external_ip_addr.n_ipv4_addrs == 1);
+ ovs_assert(old_external_ip_addr.n_ipv4_addrs == 1);
+ }
+
+ for (size_t i = 0; i < lr->n_ports; i++) {
+ const struct nbrec_logical_router_port *lrp = lr->ports[i];
+ const struct nbrec_logical_router_port *old_port = NULL;
+ const struct nbrec_logical_router_port *new_port = NULL;
+ if (lrp->n_gateway_chassis) {
+ num_l3dgw_ports++;
+ struct lport_addresses lrp_addrs;
+ if (!extract_lrp_networks(lrp, &lrp_addrs)) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_WARN_RL(&rl, "Extract addresses failed.");
+ continue;
+ }
+
+ if (is_v6) {
+ for (int j = 0; j < lrp_addrs.n_ipv6_addrs; j++) {
+ struct ipv6_netaddr *lrp6_addr = &lrp_addrs.ipv6_addrs[j];
+ struct in6_addr new_ip6_mask, old_ip6_mask;
+ new_ip6_mask = ipv6_addr_bitand(
+ &lrp6_addr->mask,
+ &new_external_ip_addr.ipv6_addrs[0].addr);
+ old_ip6_mask = ipv6_addr_bitand(
+ &lrp6_addr->mask,
+ &old_external_ip_addr.ipv6_addrs[0].addr);
+ if (ipv6_addr_equals(&new_ip6_mask,
+ &(lrp6_addr->network))) {
+ new_port = lrp;
+ }
+ if (ipv6_addr_equals(&old_ip6_mask,
+ &(lrp6_addr->network))) {
+ old_port = lrp;
+ }
+ }
+ } else {
+ for (int j = 0; j < lrp_addrs.n_ipv4_addrs; j++) {
+ uint32_t nw_addr = ntohl(lrp_addrs.ipv4_addrs[j].network);
+ uint32_t mask = ntohl(lrp_addrs.ipv4_addrs[j].mask);
+ uint32_t new_ip, old_ip;
+ new_ip = ntohl(new_external_ip_addr.ipv4_addrs[0].addr);
+ old_ip = ntohl(old_external_ip_addr.ipv4_addrs[0].addr);
+ if ((new_ip & mask) == nw_addr) {
+ new_port = lrp;
+ }
+ if ((old_ip & mask) == nw_addr) {
+ old_port = lrp;
+ }
+ }
+ }
+ if ((old_port || new_port) && (old_port == new_port)) {
+ is_conflict = true;
+ }
+ destroy_lport_addresses(&lrp_addrs);
+ }
+ }
+ destroy_lport_addresses(&old_external_ip_addr);
+ destroy_lport_addresses(&new_external_ip_addr);
+
+ if (num_l3dgw_ports > 1 && !is_conflict) {
+ return false;
+ }
+ return true;
+}
+
static bool
is_valid_port_range(const char *port_range)
{
@@ -4542,6 +4628,7 @@ nbctl_pre_lr_nat_add(struct ctl_context *ctx)
{
ovsdb_idl_add_column(ctx->idl, &nbrec_logical_router_col_name);
ovsdb_idl_add_column(ctx->idl, &nbrec_logical_router_col_nat);
+ ovsdb_idl_add_column(ctx->idl, &nbrec_logical_router_col_ports);
ovsdb_idl_add_column(ctx->idl, &nbrec_logical_switch_port_col_name);
@@ -4551,6 +4638,11 @@ nbctl_pre_lr_nat_add(struct ctl_context *ctx)
ovsdb_idl_add_column(ctx->idl, &nbrec_nat_col_logical_port);
ovsdb_idl_add_column(ctx->idl, &nbrec_nat_col_external_mac);
ovsdb_idl_add_column(ctx->idl, &nbrec_nat_col_options);
+
+ ovsdb_idl_add_column(ctx->idl, &nbrec_logical_router_port_col_networks);
+ ovsdb_idl_add_column(ctx->idl, &nbrec_logical_router_port_col_mac);
+ ovsdb_idl_add_column(ctx->idl,
+ &nbrec_logical_router_port_col_gateway_chassis);
}
static void
@@ -4720,12 +4812,16 @@ nbctl_lr_nat_add(struct ctl_context *ctx)
should_return = true;
}
} else {
- ctl_error(ctx, "a NAT with this type (%s) and %s (%s) "
- "already exists",
- nat_type,
- is_snat ? "logical_ip" : "external_ip",
- is_snat ? new_logical_ip : new_external_ip);
- should_return = true;
+ if (!is_snat ||
+ is_snat_rule_conflict(lr, new_external_ip,
+ old_external_ip, is_v6)) {
+ ctl_error(ctx, "a NAT with this type (%s) and %s (%s) "
+ "already exists",
+ nat_type,
+ is_snat ? "logical_ip" : "external_ip",
+ is_snat ? new_logical_ip : new_external_ip);
+ should_return = true;
+ }
}
}
}
@@ -4835,6 +4931,21 @@ nbctl_lr_nat_del(struct ctl_context *ctx)
}
int is_snat = !strcmp("snat", nat_type);
+ char *snat_external_ip = NULL;
+ if (ctx->argc == 5) {
+ if (is_snat) {
+ snat_external_ip = nat_ip;
+ nat_ip = normalize_prefix_str(ctx->argv[4]);
+ if (!snat_external_ip) {
+ ctl_error(ctx, "%s: Invalid IP address or CIDR", ctx->argv[4]);
+ }
+ } else {
+ ctl_error(ctx, "%s type takes a maximum of one ip address",
+ nat_type);
+ }
+ }
+ bool is_exist = false;
+
/* Remove the matching NAT. */
for (size_t i = 0; i < lr->n_nat; i++) {
struct nbrec_nat *nat = lr->nat[i];
@@ -4846,8 +4957,29 @@ nbctl_lr_nat_del(struct ctl_context *ctx)
continue;
}
if (!strcmp(nat_type, nat->type) && !strcmp(nat_ip, old_ip)) {
- nbrec_logical_router_update_nat_delvalue(lr, nat);
- should_return = true;
+ if (snat_external_ip != NULL) {
+ char *old_external_ip = normalize_prefix_str(nat->external_ip);
+ if (!old_external_ip) {
+ continue;
+ }
+ if (!strcmp(snat_external_ip, old_external_ip)) {
+ nbrec_logical_router_update_nat_delvalue(lr, nat);
+ free(old_external_ip);
+ is_exist = true;
+ should_return = true;
+ }
+ } else {
+ nbrec_logical_router_update_nat_delvalue(lr, nat);
+ /* When nat_type is snat and external_ip is not specified, we
+ * need to iterate over all the rules and delete all nat
entries
+ * matching the logical ip. Hence don't set should_return for
+ * snat case.
+ */
+ if (!is_snat) {
+ should_return = true;
+ }
+ is_exist = true;
+ }
}
free(old_ip);
if (should_return) {
@@ -4855,13 +4987,16 @@ nbctl_lr_nat_del(struct ctl_context *ctx)
}
}
- if (must_exist) {
+ if (must_exist && !is_exist) {
ctl_error(ctx, "no matching NAT with the type (%s) and %s (%s)",
nat_type, is_snat ? "logical_ip" : "external_ip", nat_ip);
}
cleanup:
free(nat_ip);
+ if (snat_external_ip != NULL) {
+ free(snat_external_ip);
+ }
}
static void
@@ -7109,7 +7244,7 @@ static const struct ctl_command_syntax nbctl_commands[] =
{
"[LOGICAL_PORT EXTERNAL_MAC] [EXTERNAL_PORT_RANGE]",
nbctl_pre_lr_nat_add, nbctl_lr_nat_add,
NULL, "--may-exist,--stateless,--portrange,--add-route", RW },
- { "lr-nat-del", 1, 3, "ROUTER [TYPE [IP]]",
+ { "lr-nat-del", 1, 4, "ROUTER [TYPE [IP [LOGICAL_IP]]]",
nbctl_pre_lr_nat_del, nbctl_lr_nat_del, NULL, "--if-exists", RW },
{ "lr-nat-list", 1, 1, "ROUTER", nbctl_pre_lr_nat_list,
nbctl_lr_nat_list, NULL, "", RO },
--
2.22.3
_______________________________________________
dev mailing list
d...@openvswitch.org
https://mail.openvswitch.org/mailman/listinfo/ovs-dev
