Check if LISP is enable

Lisp enable flag is enforced. DP API should not be call if the dp is disable.

Change-Id: I265cf3ea0460987f3fd5fd84b43127dd3b1c43c3
Signed-off-by: Andrej Kozemcak <akozemca@cisco.com>

6 files changed, 105 insertions, 14 deletions

diff --git a/vnet/vnet/api_errno.h b/vnet/vnet/api_errno.h
index af6f3971a13..5d08fb434a0 100644
--- a/vnet/vnet/api_errno.h
+++ b/vnet/vnet/api_errno.h
@@ -79,7 +79,8 @@ _(NOT_RUNNING_AS_ROOT, -85, "Not running as root") \
 _(ALREADY_CONNECTED, -86, "Connection to the data plane already exists") \
 _(UNSUPPORTED_JNI_VERSION, -87, "Unsupported JNI version") \
 _(FAILED_TO_ATTACH_TO_JAVA_THREAD, -88, "Failed to attach to Java thread") \
-_(INVALID_WORKER, -89, "Invalid worker thread")
+_(INVALID_WORKER, -89, "Invalid worker thread")                         \
+_(LISP_DISABLED, -90, "LISP is disabled")
 
 typedef enum {
 #define _(a,b,c) VNET_API_ERROR_##a = (b),
diff --git a/vnet/vnet/lisp-cp/control.c b/vnet/vnet/lisp-cp/control.c
index 537a3340dfd..b6612c44bb4 100644
--- a/vnet/vnet/lisp-cp/control.c
+++ b/vnet/vnet/lisp-cp/control.c
@@ -139,6 +139,12 @@ vnet_lisp_add_del_local_mapping (vnet_lisp_add_del_mapping_args_t * a,
   vnet_lisp_gpe_add_del_iface_args_t _ai, *ai = &_ai;
   lisp_cp_main_t * lcm = vnet_lisp_cp_get_main ();
 
+  if (vnet_lisp_enable_disable_status () == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   vni = gid_address_vni(&a->deid);
 
   /* store/remove mapping from map-cache */
@@ -210,6 +216,7 @@ lisp_add_del_local_eid_command_fn (vlib_main_t * vm, unformat_input_t * input,
   u32 locator_set_index = 0, map_index = 0;
   uword * p;
   vnet_lisp_add_del_mapping_args_t _a, * a = &_a;
+  int rv = 0;
 
   gid_address_type (&eid) = GID_ADDR_IP_PREFIX;
 
@@ -251,7 +258,12 @@ lisp_add_del_local_eid_command_fn (vlib_main_t * vm, unformat_input_t * input,
   a->locator_set_index = locator_set_index;
   a->local = 1;
 
-  vnet_lisp_add_del_local_mapping (a, &map_index);
+  rv = vnet_lisp_add_del_local_mapping (a, &map_index);
+  if (0 != rv)
+   {
+      error = clib_error_return(0, "failed to %s eid-table!",
+                                is_add ? "add" : "delete");
+   }
  done:
   vec_free(eids);
   if (locator_set_name)
@@ -383,6 +395,12 @@ vnet_lisp_add_del_remote_mapping (gid_address_t * deid, gid_address_t * seid,
   ip_address_t * dl;
   int rc = -1;
 
+  if (vnet_lisp_enable_disable_status() == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   if (del_all)
     return vnet_lisp_clear_all_remote_mappings ();
 
@@ -700,6 +718,12 @@ vnet_lisp_pitr_set_locator_set (u8 * locator_set_name, u8 is_add)
   mapping_t * m;
   uword * p;
 
+  if (vnet_lisp_enable_disable_status () == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   p = hash_get_mem (lcm->locator_set_index_by_name, locator_set_name);
   if (!p)
     {
@@ -738,6 +762,8 @@ lisp_pitr_set_locator_set_command_fn (vlib_main_t * vm,
   u8 * locator_set_name = 0;
   u8 is_add = 1;
   unformat_input_t _line_input, * line_input = &_line_input;
+  clib_error_t * error = 0;
+  int rv = 0;
 
   /* Get a line of input. */
   if (! unformat_user (input, unformat_line_input, line_input))
@@ -758,12 +784,17 @@ lisp_pitr_set_locator_set_command_fn (vlib_main_t * vm,
       clib_warning ("No locator set specified!");
       goto done;
     }
-  vnet_lisp_pitr_set_locator_set (locator_set_name, is_add);
+  rv = vnet_lisp_pitr_set_locator_set (locator_set_name, is_add);
+  if (0 != rv)
+    {
+      error = clib_error_return(0, "failed to %s pitr!",
+                                is_add ? "add" : "delete");
+    }
 
 done:
   if (locator_set_name)
     vec_free (locator_set_name);
-  return 0;
+  return error;
 }
 
 VLIB_CLI_COMMAND (lisp_pitr_set_locator_set_command) = {
@@ -917,6 +948,12 @@ vnet_lisp_add_del_locator (vnet_lisp_add_del_locator_set_args_t * a,
 
   ASSERT(a != NULL);
 
+  if (vnet_lisp_enable_disable_status () == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   p = get_locator_set_index(a, p);
   if (!p)
     {
@@ -1002,6 +1039,12 @@ vnet_lisp_add_del_locator_set (vnet_lisp_add_del_locator_set_args_t * a,
   u32 ** eid_indexes;
   int ret = 0;
 
+  if (vnet_lisp_enable_disable_status () == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   if (a->is_add)
     {
       p = get_locator_set_index(a, p);
@@ -1264,6 +1307,7 @@ lisp_add_del_locator_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
   locator_t locator, * locators = 0;
   vnet_lisp_add_del_locator_set_args_t _a, * a = &_a;
   u32 ls_index = 0;
+  int rv = 0;
 
   memset(&locator, 0, sizeof(locator));
   memset(a, 0, sizeof(a[0]));
@@ -1297,7 +1341,12 @@ lisp_add_del_locator_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
   a->is_add = is_add;
   a->local = 1;
 
-  vnet_lisp_add_del_locator_set(a, &ls_index);
+  rv = vnet_lisp_add_del_locator_set(a, &ls_index);
+  if (0 != rv)
+    {
+      error = clib_error_return(0, "failed to %s locator-set!",
+                                is_add ? "add" : "delete");
+    }
 
  done:
   vec_free(locators);
@@ -1358,6 +1407,12 @@ vnet_lisp_add_del_map_resolver (vnet_lisp_add_del_map_resolver_args_t * a)
   ip_address_t * addr;
   u32 i;
 
+  if (vnet_lisp_enable_disable_status () == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   if (a->is_add)
     {
       vec_foreach(addr, lcm->map_resolvers)
@@ -1395,6 +1450,7 @@ lisp_add_del_map_resolver_command_fn (vlib_main_t * vm,
   u8 is_add = 1;
   ip_address_t ip_addr;
   clib_error_t * error = 0;
+  int rv = 0;
   vnet_lisp_add_del_map_resolver_args_t _a, * a = &_a;
 
   /* Get a line of input. */
@@ -1417,7 +1473,12 @@ lisp_add_del_map_resolver_command_fn (vlib_main_t * vm,
     }
   a->is_add = is_add;
   a->address = ip_addr;
-  vnet_lisp_add_del_map_resolver (a);
+  rv = vnet_lisp_add_del_map_resolver (a);
+  if (0 != rv)
+    {
+      error = clib_error_return(0, "failed to %s map-resolver!",
+                                is_add ? "add" : "delete");
+    }
 
  done:
   return error;
diff --git a/vnet/vnet/lisp-gpe/interface.c b/vnet/vnet/lisp-gpe/interface.c
index d52df25b550..7537962b3bc 100644
--- a/vnet/vnet/lisp-gpe/interface.c
+++ b/vnet/vnet/lisp-gpe/interface.c
@@ -480,7 +480,7 @@ lisp_gpe_iface_set_table (u32 sw_if_index, u32 table_id, u8 is_ip4)
     }
 }
 
-void
+int
 vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t * a,
                              u32 * hw_if_indexp)
 {
@@ -490,6 +490,12 @@ vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t * a,
   u32 hw_if_index = ~0, lookup_next_index4, lookup_next_index6, flen;
   uword * hip, * vni;
 
+  if (vnet_lisp_gpe_enable_disable_status() == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   hip = hash_get(lgm->lisp_gpe_hw_if_index_by_table_id, a->table_id);
 
   if (a->is_add)
@@ -497,7 +503,7 @@ vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t * a,
       if (hip)
         {
           clib_warning ("Interface for vrf %d already exists", a->table_id);
-          return;
+          return -1;
         }
 
       /* create hw lisp_gpeX iface if needed, otherwise reuse existing */
@@ -560,7 +566,7 @@ vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t * a,
       if (hip == 0)
         {
           clib_warning("The interface for vrf %d doesn't exist", a->table_id);
-          return;
+          return -1;
         }
       hi = vnet_get_hw_interface (vnm, hip[0]);
 
@@ -579,6 +585,8 @@ vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t * a,
       add_del_lisp_gpe_default_route (a->table_id, /* is_v4 */1, 0);
       add_del_lisp_gpe_default_route (a->table_id, /* is_v4 */0, 0);
     }
+
+  return 0;
 }
 
 static clib_error_t *
@@ -587,6 +595,8 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
 {
   unformat_input_t _line_input, * line_input = &_line_input;
   u8 is_add = 1;
+  clib_error_t * error = 0;
+  int rv = 0;
   u32 table_id;
 
   vnet_lisp_gpe_add_del_iface_args_t _a, * a = &_a;
@@ -612,8 +622,14 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
 
   a->is_add = is_add;
   a->table_id = table_id;
-  vnet_lisp_gpe_add_del_iface (a, 0);
-  return 0;
+  rv = vnet_lisp_gpe_add_del_iface (a, 0);
+  if (0 != rv)
+    {
+      error = clib_error_return(0, "failed to %s gpe iface!",
+                                is_add ? "add" : "delete");
+    }
+
+  return error;
 }
 
 VLIB_CLI_COMMAND (add_del_lisp_gpe_iface_command, static) = {
diff --git a/vnet/vnet/lisp-gpe/lisp_gpe.c b/vnet/vnet/lisp-gpe/lisp_gpe.c
index f594e927ea8..c11824e6315 100644
--- a/vnet/vnet/lisp-gpe/lisp_gpe.c
+++ b/vnet/vnet/lisp-gpe/lisp_gpe.c
@@ -227,6 +227,12 @@ vnet_lisp_gpe_add_del_fwd_entry (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
   uword * lookup_next_index, * lgpe_sw_if_index, * lnip;
   u8 ip_ver;
 
+  if (vnet_lisp_gpe_enable_disable_status() == 0)
+    {
+      clib_warning ("LISP is disabled!");
+      return VNET_API_ERROR_LISP_DISABLED;
+    }
+
   /* treat negative fwd entries separately */
   if (a->is_negative)
     return add_del_negative_fwd_entry (lgm, a);
@@ -303,6 +309,7 @@ lisp_gpe_add_del_fwd_entry_command_fn (vlib_main_t * vm,
   gid_address_t * eids = 0, eid;
   clib_error_t * error = 0;
   u32 i;
+  int rv;
 
   prefp = &gid_address_ippref(&eid);
 
@@ -355,7 +362,13 @@ lisp_gpe_add_del_fwd_entry_command_fn (vlib_main_t * vm,
       a.deid = eids[i];
       a.slocator = slocators[i];
       a.dlocator = dlocators[i];
-      vnet_lisp_gpe_add_del_fwd_entry (&a, 0);
+      rv = vnet_lisp_gpe_add_del_fwd_entry (&a, 0);
+      if (0 != rv)
+        {
+          error = clib_error_return(0, "failed to %s gpe maptunnel!",
+                                    is_add ? "add" : "delete");
+          break;
+        }
     }
 
  done:
diff --git a/vnet/vnet/lisp-gpe/lisp_gpe.h b/vnet/vnet/lisp-gpe/lisp_gpe.h
index 2d18d7d671d..705b64f610b 100644
--- a/vnet/vnet/lisp-gpe/lisp_gpe.h
+++ b/vnet/vnet/lisp-gpe/lisp_gpe.h
@@ -180,7 +180,7 @@ typedef struct
 
 u8
 vnet_lisp_gpe_enable_disable_status(void);
-void
+int
 vnet_lisp_gpe_add_del_iface (vnet_lisp_gpe_add_del_iface_args_t *a,
 			     u32 * hw_if_indexp);
 
diff --git a/vpp/api/api.c b/vpp/api/api.c
index bb9a29636fd..9a5935a880c 100644
--- a/vpp/api/api.c
+++ b/vpp/api/api.c
@@ -4935,7 +4935,7 @@ vl_api_lisp_gpe_add_del_iface_t_handler(
     a->is_add = mp->is_add;
     a->table_id = mp->table_id;
     a->vni = mp->vni;
-    vnet_lisp_gpe_add_del_iface (a, 0);
+    rv = vnet_lisp_gpe_add_del_iface (a, 0);
 
     REPLY_MACRO(VL_API_LISP_GPE_ADD_DEL_IFACE_REPLY);
 }