vxlan: move vxlan-gpe to a plugin

Move vxlan-gpe folder under vnet to the plugin folder,
update cmake configuration and header paths,
and add plugin.c to register plugin.

JIRA: VPP-2059

Type: improvement
Change-Id: I31b6d326276c4aa684fcdcf8443ef349f7816a6d
Signed-off-by: lajoskatona <katonalala@gmail.com>
Signed-off-by: Nicolas PLANEL <nplanel@cisco.com>

3 files changed, 27 insertions, 15 deletions

diff --git a/src/plugins/nsh/nsh.c b/src/plugins/nsh/nsh.c
index a2c24e27b26..06dd45be944 100644
--- a/src/plugins/nsh/nsh.c
+++ b/src/plugins/nsh/nsh.c
@@ -20,7 +20,7 @@
 #include <nsh/nsh.h>
 #include <gre/gre.h>
 #include <vxlan/vxlan.h>
-#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <plugins/vxlan-gpe/vxlan_gpe.h>
 #include <vnet/l2/l2_classify.h>
 #include <vnet/adj/adj.h>
 #include <vpp/app/version.h>
@@ -182,7 +182,8 @@ nsh_md2_set_next_ioam_export_override (uword next)
 clib_error_t *
 nsh_init (vlib_main_t * vm)
 {
-  vlib_node_t *node, *gre4_input, *gre6_input;
+  vlib_node_t *node, *gre4_input, *gre6_input, *vxlan4_gpe_input,
+    *vxlan6_gpe_input;
   nsh_main_t *nm = &nsh_main;
   clib_error_t *error = 0;
   uword next_node;
@@ -222,20 +223,24 @@ nsh_init (vlib_main_t * vm)
 
   /* Add dispositions to nodes that feed nsh-input */
   //alagalah - validate we don't really need to use the node value
+  vxlan4_gpe_input = vlib_get_node_by_name (vm, (u8 *) "vxlan4-gpe-input");
+  vxlan6_gpe_input = vlib_get_node_by_name (vm, (u8 *) "vxlan6-gpe-input");
+  nm->vgm = vlib_get_plugin_symbol ("vxlan-gpe_plugin.so", "vxlan_gpe_main");
+  if (vxlan4_gpe_input == 0 || vxlan6_gpe_input == 0 || nm->vgm == 0)
+    {
+      error = clib_error_return (0, "vxlan_gpe_plugin.so is not loaded");
+      return error;
+    }
   next_node =
-    vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
-			nm->nsh_input_node_index);
-  vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
-		      nm->nsh_proxy_node_index);
-  vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
+    vlib_node_add_next (vm, vxlan4_gpe_input->index, nm->nsh_input_node_index);
+  vlib_node_add_next (vm, vxlan4_gpe_input->index, nm->nsh_proxy_node_index);
+  vlib_node_add_next (vm, vxlan4_gpe_input->index,
 		      nsh_aware_vnf_proxy_node.index);
-  vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_NSH, next_node);
+  nm->vgm->register_decap_protocol (VXLAN_GPE_PROTOCOL_NSH, next_node);
 
-  vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
-		      nm->nsh_input_node_index);
-  vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
-		      nm->nsh_proxy_node_index);
-  vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
+  vlib_node_add_next (vm, vxlan6_gpe_input->index, nm->nsh_input_node_index);
+  vlib_node_add_next (vm, vxlan6_gpe_input->index, nm->nsh_proxy_node_index);
+  vlib_node_add_next (vm, vxlan6_gpe_input->index,
 		      nsh_aware_vnf_proxy_node.index);
 
   gre4_input = vlib_get_node_by_name (vm, (u8 *) "gre4-input");
@@ -280,7 +285,9 @@ nsh_init (vlib_main_t * vm)
   return error;
 }
 
-VLIB_INIT_FUNCTION (nsh_init);
+VLIB_INIT_FUNCTION (nsh_init) = {
+  .runs_after = VLIB_INITS ("vxlan_gpe_init"),
+};
 
 VLIB_PLUGIN_REGISTER () = {
     .version = VPP_BUILD_VER,
diff --git a/src/plugins/nsh/nsh.h b/src/plugins/nsh/nsh.h
index 86a9a7e95c3..c408ddb99a2 100644
--- a/src/plugins/nsh/nsh.h
+++ b/src/plugins/nsh/nsh.h
@@ -18,6 +18,7 @@
 #include <vnet/vnet.h>
 #include <nsh/nsh_packet.h>
 #include <vnet/ip/ip4_packet.h>
+#include <plugins/vxlan-gpe/vxlan_gpe.h>
 
 typedef struct {
   u16 class;
@@ -166,6 +167,10 @@ typedef struct {
   /* convenience */
   vlib_main_t * vlib_main;
   vnet_main_t * vnet_main;
+
+  /* vxlan gpe plugin */
+  vxlan_gpe_main_t *vgm;
+
 } nsh_main_t;
 
 extern nsh_main_t nsh_main;
diff --git a/src/plugins/nsh/nsh_pop.c b/src/plugins/nsh/nsh_pop.c
index 8de319e158b..d66cfc9de27 100644
--- a/src/plugins/nsh/nsh_pop.c
+++ b/src/plugins/nsh/nsh_pop.c
@@ -19,7 +19,7 @@
 #include <vnet/plugin/plugin.h>
 #include <nsh/nsh.h>
 #include <vnet/gre/packet.h>
-#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <plugins/vxlan-gpe/vxlan_gpe.h>
 #include <vnet/l2/l2_classify.h>
 
 #include <vlibapi/api.h>