session: remove support for shm bapi attachment

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I21bda0c46406aff54ad8fe5e44491e8e332de170

5 files changed, 30 insertions, 57 deletions

diff --git a/src/plugins/unittest/session_test.c b/src/plugins/unittest/session_test.c
index c152a8ac9da..d3a4e091647 100644
--- a/src/plugins/unittest/session_test.c
+++ b/src/plugins/unittest/session_test.c
@@ -1821,8 +1821,6 @@ session_test_mq_speed (vlib_main_t * vm, unformat_input_t * input)
   /* Shut up coverity */
   if (reg == 0)
     abort ();
-  if (!session_main.evt_qs_use_memfd_seg)
-    reg->clib_file_index = VL_API_INVALID_FI;
 
   vnet_app_attach_args_t attach_args = {
     .api_client_index = api_index,
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index c62496e1d5f..975239e563d 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -484,7 +484,6 @@ application_alloc_and_init (app_init_args_t * a)
 {
   ssvm_segment_type_t seg_type = SSVM_SEGMENT_MEMFD;
   segment_manager_props_t *props;
-  vl_api_registration_t *reg;
   application_t *app;
   u64 *options;
 
@@ -494,17 +493,7 @@ application_alloc_and_init (app_init_args_t * a)
    * Make sure we support the requested configuration
    */
   if (options[APP_OPTIONS_FLAGS] & APP_OPTIONS_FLAGS_IS_BUILTIN)
-    {
-      seg_type = SSVM_SEGMENT_PRIVATE;
-    }
-  else if (!a->use_sock_api)
-    {
-      reg = vl_api_client_index_to_registration (a->api_client_index);
-      if (!reg)
-	return VNET_API_ERROR_APP_UNSUPPORTED_CFG;
-      if (vl_api_registration_file_index (reg) == VL_API_INVALID_FI)
-	seg_type = SSVM_SEGMENT_SHM;
-    }
+    seg_type = SSVM_SEGMENT_PRIVATE;
 
   if ((options[APP_OPTIONS_FLAGS] & APP_OPTIONS_FLAGS_EVT_MQ_USE_EVENTFD)
       && seg_type != SSVM_SEGMENT_MEMFD)
@@ -855,8 +844,8 @@ vnet_application_attach (vnet_app_attach_args_t * a)
 	}
 
       secret = a->options[APP_OPTIONS_NAMESPACE_SECRET];
-      if ((rv =
-	   app_validate_namespace (a->namespace_id, secret, &app_ns_index)))
+      if ((rv = app_validate_namespace (a->namespace_id, secret,
+					&app_ns_index)))
 	return rv;
       a->options[APP_OPTIONS_NAMESPACE] = app_ns_index;
     }
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 0b489882766..9429ddb3c8a 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -1469,11 +1469,8 @@ session_transport_cleanup (session_t * s)
 /**
  * Allocate event queues in the shared-memory segment
  *
- * That can either be a newly created memfd segment, that will need to be
- * mapped by all stack users, or the binary api's svm region. The latter is
- * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
- * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
- * vpp uses api svm region for event queues.
+ * That can only be a newly created memfd segment, that must be
+ * mapped by all apps/stack users.
  */
 void
 session_vpp_event_queues_allocate (session_main_t * smm)
@@ -1488,28 +1485,22 @@ session_vpp_event_queues_allocate (session_main_t * smm)
   if (smm->configured_event_queue_length)
     evt_q_length = smm->configured_event_queue_length;
 
-  if (smm->evt_qs_use_memfd_seg)
-    {
-      if (smm->evt_qs_segment_size)
-	eqs_size = smm->evt_qs_segment_size;
+  if (smm->evt_qs_segment_size)
+    eqs_size = smm->evt_qs_segment_size;
 
-      eqs->ssvm_size = eqs_size;
-      eqs->my_pid = vpp_pid;
-      eqs->name = format (0, "%s%c", "session: evt-qs-segment", 0);
-      /* clib_mem_vm_map_shared consumes first page before requested_va */
-      eqs->requested_va = smm->session_baseva + clib_mem_get_page_size ();
+  eqs->ssvm_size = eqs_size;
+  eqs->my_pid = vpp_pid;
+  eqs->name = format (0, "%s%c", "session: evt-qs-segment", 0);
+  /* clib_mem_vm_map_shared consumes first page before requested_va */
+  eqs->requested_va = smm->session_baseva + clib_mem_get_page_size ();
 
-      if (ssvm_server_init (eqs, SSVM_SEGMENT_MEMFD))
-	{
-	  clib_warning ("failed to initialize queue segment");
-	  return;
-	}
+  if (ssvm_server_init (eqs, SSVM_SEGMENT_MEMFD))
+    {
+      clib_warning ("failed to initialize queue segment");
+      return;
     }
 
-  if (smm->evt_qs_use_memfd_seg)
-    oldheap = ssvm_push_heap (eqs->sh);
-  else
-    oldheap = vl_msg_push_heap ();
+  oldheap = ssvm_push_heap (eqs->sh);
 
   for (i = 0; i < vec_len (smm->wrk); i++)
     {
@@ -1524,26 +1515,17 @@ session_vpp_event_queues_allocate (session_main_t * smm)
       cfg->q_nitems = evt_q_length;
       cfg->ring_cfgs = rc;
       smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
-      if (smm->evt_qs_use_memfd_seg)
-	{
-	  if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
-	    clib_warning ("eventfd returned");
-	}
+      if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
+	clib_warning ("eventfd returned");
     }
 
-  if (smm->evt_qs_use_memfd_seg)
-    ssvm_pop_heap (oldheap);
-  else
-    vl_msg_pop_heap (oldheap);
+  ssvm_pop_heap (oldheap);
 }
 
 ssvm_private_t *
 session_main_get_evt_q_segment (void)
 {
-  session_main_t *smm = &session_main;
-  if (smm->evt_qs_use_memfd_seg)
-    return &smm->evt_qs_segment;
-  return 0;
+  return &session_main.evt_qs_segment;
 }
 
 u64
@@ -1818,7 +1800,6 @@ session_main_init (vlib_main_t * vm)
 #endif
 
   smm->last_transport_proto_type = TRANSPORT_PROTO_QUIC;
-  smm->evt_qs_use_memfd_seg = 1;
 
   return 0;
 }
@@ -1913,8 +1894,9 @@ session_config_fn (vlib_main_t * vm, unformat_input_t * input)
       else if (unformat (input, "local-endpoints-table-buckets %d",
 			 &smm->local_endpoints_table_buckets))
 	;
+      /* Deprecated but maintained for compatibility */
       else if (unformat (input, "evt_qs_memfd_seg"))
-	smm->evt_qs_use_memfd_seg = 1;
+	;
       else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
 			 &smm->evt_qs_segment_size))
 	;
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index 2de22bd2650..f6997fb18f6 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -142,7 +142,7 @@ typedef struct session_main_
   /** Worker contexts */
   session_worker_t *wrk;
 
-  /** Event queues memfd segment initialized only if so configured */
+  /** Event queues memfd segment */
   ssvm_private_t evt_qs_segment;
 
   /** Unique segment name counter */
@@ -178,7 +178,6 @@ typedef struct session_main_
   uword session_baseva;
   uword session_va_space_size;
   uword evt_qs_segment_size;
-  u8 evt_qs_use_memfd_seg;
 
   /** Session table size parameters */
   u32 configured_v4_session_table_buckets;
diff --git a/src/vnet/session/session_api.c b/src/vnet/session/session_api.c
index 6a609eb92fa..90c0772493a 100644
--- a/src/vnet/session/session_api.c
+++ b/src/vnet/session/session_api.c
@@ -614,6 +614,12 @@ vl_api_app_attach_t_handler (vl_api_app_attach_t * mp)
       rv = VNET_API_ERROR_FEATURE_DISABLED;
       goto done;
     }
+  /* Only support binary api with socket transport */
+  if (vl_api_registration_file_index (reg) == VL_API_INVALID_FI)
+    {
+      rv = VNET_API_ERROR_APP_UNSUPPORTED_CFG;
+      goto done;
+    }
 
   STATIC_ASSERT (sizeof (u64) * APP_OPTIONS_N_OPTIONS <=
 		 sizeof (mp->options),
@@ -623,7 +629,6 @@ vl_api_app_attach_t_handler (vl_api_app_attach_t * mp)
   a->api_client_index = mp->client_index;
   a->options = mp->options;
   a->session_cb_vft = &session_mq_cb_vft;
-
   a->namespace_id = vl_api_from_api_to_new_vec (mp, &mp->namespace_id);
 
   if ((rv = vnet_application_attach (a)))