[ovs-dev] [PATCH v1 2/3 ovn] NAT: Northd changes to provide port range

Ankur Sharma svc.mail.git at nutanix.com
Fri Mar 27 23:18:23 UTC 2020


From: Ankur Sharma <ankur.sharma at nutanix.com>

This patch has northd changes to put
port range in the logical flow based on configuration.

Port range is NOT applicable for stateless dnat_and_snat
rules.

Signed-off-by: Ankur Sharma <ankur.sharma at nutanix.com>
---
 northd/ovn-northd.c | 31 +++++++++++++++++++++-----
 tests/ovn-northd.at | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+), 5 deletions(-)

diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index b76df05..4dc537a 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -8810,7 +8810,13 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap *ports,
                                       is_v6 ? "6" : "4", nat->logical_ip);
                     } else {
                         ds_put_format(&actions, "flags.loopback = 1; "
-                                      "ct_dnat(%s);", nat->logical_ip);
+                                      "ct_dnat(%s", nat->logical_ip);
+
+                        if (strlen(nat->external_port_range)) {
+                            ds_put_format(&actions, ",%s",
+                                          nat->external_port_range);
+                        }
+                        ds_put_format(&actions, ");");
                     }
 
                     ovn_lflow_add_with_hint(lflows, od, S_ROUTER_IN_DNAT, 100,
@@ -8838,8 +8844,12 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap *ports,
                         ds_put_format(&actions, "ip%s.dst=%s; next;",
                                       is_v6 ? "6" : "4", nat->logical_ip);
                     } else {
-                        ds_put_format(&actions, "ct_dnat(%s);",
-                                      nat->logical_ip);
+                        ds_put_format(&actions, "ct_dnat(%s", nat->logical_ip);
+                        if (strlen(nat->external_port_range)) {
+                            ds_put_format(&actions, ",%s",
+                                          nat->external_port_range);
+                        }
+                        ds_put_format(&actions, ");");
                     }
 
                     ovn_lflow_add_with_hint(lflows, od, S_ROUTER_IN_DNAT, 100,
@@ -8938,8 +8948,14 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap *ports,
                         ds_put_format(&actions, "ip%s.src=%s; next;",
                                       is_v6 ? "6" : "4", nat->external_ip);
                     } else {
-                        ds_put_format(&actions, "ct_snat(%s);",
+                        ds_put_format(&actions, "ct_snat(%s",
                                       nat->external_ip);
+
+                        if (strlen(nat->external_port_range)) {
+                            ds_put_format(&actions, ",%s",
+                                          nat->external_port_range);
+                        }
+                        ds_put_format(&actions, ");");
                     }
 
                     /* The priority here is calculated such that the
@@ -8976,8 +8992,13 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap *ports,
                         ds_put_format(&actions, "ip%s.src=%s; next;",
                                       is_v6 ? "6" : "4", nat->external_ip);
                     } else {
-                        ds_put_format(&actions, "ct_snat(%s);",
+                        ds_put_format(&actions, "ct_snat(%s",
                                       nat->external_ip);
+                        if (strlen(nat->external_port_range)) {
+                            ds_put_format(&actions, ",%s",
+                                          nat->external_port_range);
+                        }
+                        ds_put_format(&actions, ");");
                     }
 
                     /* The priority here is calculated such that the
diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index a2989e7..b18f077 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -1074,6 +1074,70 @@ AT_CHECK([ovn-sbctl dump-flows R1 | grep ip6.src=| wc -l], [0], [2
 
 AT_CLEANUP
 
+AT_SETUP([ovn -- check portrange dnat, snat and dnat_and_snat rules])
+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 ls-add S1
+ovn-nbctl lsp-add S1 S1-R1
+ovn-nbctl lsp-set-type S1-R1 router
+ovn-nbctl lsp-set-addresses S1-R1 router
+ovn-nbctl --wait=sb lsp-set-options S1-R1 router-port=R1-S1
+
+ovn-nbctl lrp-set-gateway-chassis R1-S1 gw1
+
+uuid=`ovn-sbctl --columns=_uuid --bare find Port_Binding logical_port=cr-R1-S1`
+echo "CR-LRP UUID is: " $uuid
+
+# IPV4
+ovn-nbctl --portrange lr-nat-add R1 dnat_and_snat  172.16.1.1 50.0.0.11 1-3000
+
+OVS_WAIT_UNTIL([test 2 = `ovn-sbctl dump-flows R1 | grep lr_in_unsnat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_snat | grep 3000 | wc -l], [0], [1
+])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_dnat | grep 3000 | wc -l], [0], [1
+])
+
+
+ovn-nbctl lr-nat-del R1 dnat_and_snat  172.16.1.1
+
+ovn-nbctl --portrange lr-nat-add R1 snat  172.16.1.1 50.0.0.11 1-3000
+
+OVS_WAIT_UNTIL([test 2 = `ovn-sbctl dump-flows R1 | grep lr_in_unsnat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_snat | grep 3000 | wc -l], [0], [1
+])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_dnat | grep 3000 | wc -l], [0], [0
+])
+
+ovn-nbctl lr-nat-del R1 snat  172.16.1.1
+
+ovn-nbctl --portrange --stateless lr-nat-add R1 dnat_and_snat  172.16.1.2 50.0.0.12 1-3000
+ovn-sbctl dump-flows R1
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_in_unsnat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_snat | grep 3000 | grep 172.16.1.2 | wc -l], [0], [0
+])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep ct_dnat | grep 3000 | grep 172.16.1.2 | wc -l], [0], [0
+])
+
+
+ovn-nbctl lr-nat-del R1 dnat_and_snat  172.16.1.1
+
+AT_CLEANUP
+
 AT_SETUP([ovn -- check Load balancer health check and Service Monitor sync])
 AT_SKIP_IF([test $HAVE_PYTHON = no])
 ovn_start
-- 
1.8.3.1



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