Support kube-proxy data plane

This plugin provides kube-proxy data plane on user space,
which is used to replace linux kernal's kube-proxy based on iptables.
The idea is largely inspired from VPP LB plugin.

Currently, kube-proxy plugin supports three service types:
1) Cluster IP plus Port: support any protocols, including TCP, UDP.
2) Node IP plus Node Port: currently only support UDP.
3) External Load Balancer.

Please refer to kp_plugin_doc.md for details.

Change-Id: I36690e417dd26ad5ec1bd77c7ea4b8100416cac6
Signed-off-by: Hongjun Ni <hongjun.ni@intel.com>

1 files changed, 249 insertions, 0 deletions

diff --git a/src/plugins/kubeproxy/kp_api.c b/src/plugins/kubeproxy/kp_api.c
new file mode 100644
index 00000000000..56b247a395e
--- /dev/null
+++ b/src/plugins/kubeproxy/kp_api.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright (c) 2016 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "POD IS" BPODIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <kubeproxy/kp.h>
+
+#include <vppinfra/byte_order.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+#define vl_msg_id(n,h) n,
+typedef enum {
+#include <kubeproxy/kp.api.h>
+    /* We'll want to know how many messages IDs we need... */
+    VL_MSG_FIRST_AVAILABLE,
+} vl_msg_id_t;
+#undef vl_msg_id
+
+
+/* define message structures */
+#define vl_typedefs
+#include <kubeproxy/kp.api.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <kubeproxy/kp.api.h>
+#undef vl_endianfun
+
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <kubeproxy/kp.api.h>
+#undef vl_api_version
+
+#define vl_msg_name_crc_list
+#include <kubeproxy/kp.api.h>
+#undef vl_msg_name_crc_list
+
+
+#define REPLY_MSG_ID_BASE kpm->msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static void
+setup_message_id_table (kp_main_t * kpm, api_main_t * am)
+{
+#define _(id,n,crc) \
+  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + kpm->msg_id_base);
+  foreach_vl_msg_name_crc_kp;
+#undef _
+}
+
+/* Macro to finish up custom dump fns */
+#define FINISH                                  \
+    vec_add1 (s, 0);                            \
+    vl_print (handle, (char *)s);               \
+    vec_free (s);                               \
+    return handle;
+
+static void
+vl_api_kp_conf_t_handler
+(vl_api_kp_conf_t * mp)
+{
+  kp_main_t *kpm = &kp_main;
+  vl_api_kp_conf_reply_t * rmp;
+  int rv = 0;
+
+  rv = kp_conf(mp->sticky_buckets_per_core,
+               mp->flow_timeout);
+
+ REPLY_MACRO (VL_API_KP_CONF_REPLY);
+}
+
+static void *vl_api_kp_conf_t_print
+(vl_api_kp_conf_t *mp, void * handle)
+{
+  u8 * s;
+  s = format (0, "SCRIPT: kp_conf ");
+  s = format (s, "%u ", mp->sticky_buckets_per_core);
+  s = format (s, "%u ", mp->flow_timeout);
+  FINISH;
+}
+
+
+static void
+vl_api_kp_add_del_vip_t_handler
+(vl_api_kp_add_del_vip_t * mp)
+{
+  kp_main_t *kpm = &kp_main;
+  vl_api_kp_conf_reply_t * rmp;
+  int rv = 0;
+  ip46_address_t prefix;
+  u8 prefix_length = mp->prefix_length;
+
+  if (mp->is_ipv6 == 0)
+    {
+      prefix_length += 96;
+      memcpy(&prefix.ip4, mp->ip_prefix, sizeof(prefix.ip4));
+      prefix.pad[0] = prefix.pad[1] = prefix.pad[2] = 0;
+    }
+  else
+    {
+      memcpy(&prefix.ip6, mp->ip_prefix, sizeof(prefix.ip6));
+    }
+
+  if (mp->is_del) {
+    u32 vip_index;
+    if (!(rv = kp_vip_find_index(&prefix, prefix_length, &vip_index)))
+      rv = kp_vip_del(vip_index);
+  } else {
+    u32 vip_index;
+    kp_vip_type_t type;
+    if (mp->is_ipv6 == 0) {
+      type = mp->is_nat4?KP_VIP_TYPE_IP4_NAT44:KP_VIP_TYPE_IP4_NAT46;
+    } else {
+      type = mp->is_nat4?KP_VIP_TYPE_IP6_NAT64:KP_VIP_TYPE_IP6_NAT66;
+    }
+
+    rv = kp_vip_add(&prefix, prefix_length, type,
+		    ntohl(mp->new_flows_table_length), &vip_index,
+		    ntohs(mp->port), ntohs(mp->target_port),
+		    ntohs(mp->node_port));
+  }
+ REPLY_MACRO (VL_API_KP_CONF_REPLY);
+}
+
+static void *vl_api_kp_add_del_vip_t_print
+(vl_api_kp_add_del_vip_t *mp, void * handle)
+{
+  u8 * s;
+  s = format (0, "SCRIPT: kp_add_del_vip ");
+  s = format (s, "%U ", format_ip46_prefix,
+              (ip46_address_t *)mp->ip_prefix, mp->prefix_length, IP46_TYPE_ANY);
+  s = format (s, "port %u ", mp->port);
+  s = format (s, "target_port %u ", mp->target_port);
+  s = format (s, "node_port %u ", mp->node_port);
+  s = format (s, "%s ", mp->is_nat4?"nat4":"nat6");
+  s = format (s, "%u ", mp->new_flows_table_length);
+  s = format (s, "%s ", mp->is_del?"del":"add");
+  FINISH;
+}
+
+static void
+vl_api_kp_add_del_pod_t_handler
+(vl_api_kp_add_del_pod_t * mp)
+{
+  kp_main_t *kpm = &kp_main;
+  vl_api_kp_conf_reply_t * rmp;
+  int rv = 0;
+  u32 vip_index;
+
+  ip46_address_t vip_ip_prefix;
+  u8 vip_prefix_length = mp->vip_prefix_length;
+
+  if (mp->vip_is_ipv6 == 0)
+    {
+      vip_prefix_length += 96;
+      memcpy(&vip_ip_prefix.ip4, mp->vip_ip_prefix,
+	     sizeof(vip_ip_prefix.ip4));
+      vip_ip_prefix.pad[0] = vip_ip_prefix.pad[1] = vip_ip_prefix.pad[2] = 0;
+    }
+  else
+    {
+      memcpy(&vip_ip_prefix.ip6, mp->vip_ip_prefix,
+	     sizeof(vip_ip_prefix.ip6));
+    }
+
+  ip46_address_t pod_address;
+
+  if (mp->pod_is_ipv6 == 0)
+    {
+      memcpy(&pod_address.ip4, mp->pod_address,
+	     sizeof(pod_address.ip4));
+      pod_address.pad[0] = pod_address.pad[1] = pod_address.pad[2] = 0;
+    }
+  else
+    {
+      memcpy(&pod_address.ip6, mp->pod_address,
+	     sizeof(pod_address.ip6));
+    }
+
+  if ((rv = kp_vip_find_index(&vip_ip_prefix, vip_prefix_length, &vip_index)))
+    goto done;
+
+  if (mp->is_del)
+    rv = kp_vip_del_pods(vip_index, &pod_address, 1);
+  else
+    rv = kp_vip_add_pods(vip_index, &pod_address, 1);
+
+done:
+ REPLY_MACRO (VL_API_KP_CONF_REPLY);
+}
+
+static void *vl_api_kp_add_del_pod_t_print
+(vl_api_kp_add_del_pod_t *mp, void * handle)
+{
+  u8 * s;
+  s = format (0, "SCRIPT: kp_add_del_pod ");
+  s = format (s, "%U ", format_ip46_prefix,
+              (ip46_address_t *)mp->vip_ip_prefix, mp->vip_prefix_length, IP46_TYPE_ANY);
+  s = format (s, "%U ", format_ip46_address,
+                (ip46_address_t *)mp->pod_address, IP46_TYPE_ANY);
+  s = format (s, "%s ", mp->is_del?"del":"add");
+  FINISH;
+}
+
+/* List of message types that this plugin understands */
+#define foreach_kp_plugin_api_msg            \
+_(KP_CONF, kp_conf)                          \
+_(KP_ADD_DEL_VIP, kp_add_del_vip)            \
+_(KP_ADD_DEL_POD, kp_add_del_pod)
+
+static clib_error_t * kp_api_init (vlib_main_t * vm)
+{
+  kp_main_t *kpm = &kp_main;
+  u8 *name = format (0, "kp_%08x%c", api_version, 0);
+  kpm->msg_id_base = vl_msg_api_get_msg_ids
+      ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + kpm->msg_id_base),     \
+                           #n,                  \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_kp_plugin_api_msg;
+#undef _
+
+  /* Add our API messages to the global name_crc hash table */
+  setup_message_id_table (kpm, &api_main);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (kp_api_init);