session: connects seg manager is always first

By convention, connects segment manager will be first. Therefore it will
be the one with the first segment wherein lies the app's message queue.

Saves us the trouble of allocating it on first connect, if app started
by listening, and we no longer need to track if it's assignable to a
listener or if it can be removed.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Iba9a8ffaab618eeb41ec2144dcfee62d006dc7a2

5 files changed, 9 insertions, 10 deletions

diff --git a/src/plugins/hs_apps/http_server.c b/src/plugins/hs_apps/http_server.c
index 34892b6bd4d..a46e0a4ae13 100644
--- a/src/plugins/hs_apps/http_server.c
+++ b/src/plugins/hs_apps/http_server.c
@@ -671,8 +671,7 @@ http_server_session_connected_callback (u32 app_index, u32 api_context,
 static int
 http_server_add_segment_callback (u32 client_index, u64 segment_handle)
 {
-  clib_warning ("called...");
-  return -1;
+  return 0;
 }
 
 static void
@@ -732,6 +731,7 @@ http_server_attach ()
   a->session_cb_vft = &http_server_session_cb_vft;
   a->options = options;
   a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
+  a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = segment_size;
   a->options[APP_OPTIONS_RX_FIFO_SIZE] =
     hsm->fifo_size ? hsm->fifo_size : 8 << 10;
   a->options[APP_OPTIONS_TX_FIFO_SIZE] =
diff --git a/src/plugins/hs_apps/proxy.c b/src/plugins/hs_apps/proxy.c
index 1a49a0f1f3a..18d6edd6be2 100644
--- a/src/plugins/hs_apps/proxy.c
+++ b/src/plugins/hs_apps/proxy.c
@@ -282,8 +282,7 @@ proxy_connected_callback (u32 app_index, u32 api_context,
 static int
 proxy_add_segment_callback (u32 client_index, u64 segment_handle)
 {
-  clib_warning ("called...");
-  return -1;
+  return 0;
 }
 
 static int
diff --git a/src/plugins/http_static/static_server.c b/src/plugins/http_static/static_server.c
index 23860b083d8..c715dfa6fb8 100644
--- a/src/plugins/http_static/static_server.c
+++ b/src/plugins/http_static/static_server.c
@@ -1095,8 +1095,7 @@ http_static_server_session_connected_callback (u32 app_index, u32 api_context,
 static int
 http_static_server_add_segment_callback (u32 client_index, u64 segment_handle)
 {
-  clib_warning ("called...");
-  return -1;
+  return 0;
 }
 
 static void
@@ -1157,6 +1156,7 @@ http_static_server_attach ()
   a->session_cb_vft = &http_static_server_session_cb_vft;
   a->options = options;
   a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
+  a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = segment_size;
   a->options[APP_OPTIONS_RX_FIFO_SIZE] =
     hsm->fifo_size ? hsm->fifo_size : 8 << 10;
   a->options[APP_OPTIONS_TX_FIFO_SIZE] =
diff --git a/src/plugins/quic/quic.c b/src/plugins/quic/quic.c
index 11c3ac2d718..5a57947325a 100644
--- a/src/plugins/quic/quic.c
+++ b/src/plugins/quic/quic.c
@@ -1451,9 +1451,6 @@ quic_start_listen (u32 quic_listen_session_index, transport_endpoint_t * tep)
 
   ccfg = &sep->ext_cfg->crypto;
   app_wrk = app_worker_get (sep->app_wrk_index);
-  /* We need to call this because we call app_worker_init_connected in
-   * quic_accept_stream, which assumes the connect segment manager exists */
-  app_worker_alloc_connects_segment_manager (app_wrk);
   app = application_get (app_wrk->app_index);
   QUIC_DBG (2, "Called quic_start_listen for app %d", app_wrk->app_index);
 
diff --git a/src/plugins/unittest/session_test.c b/src/plugins/unittest/session_test.c
index cd99b0c5416..ad9c976f49e 100644
--- a/src/plugins/unittest/session_test.c
+++ b/src/plugins/unittest/session_test.c
@@ -337,6 +337,9 @@ session_test_endpoint_cfg (vlib_main_t * vm, unformat_input_t * input)
 
   attach_args.name = format (0, "session_test_server");
   attach_args.namespace_id = appns_id;
+  /* Allow server to allocate another segment for listens. Needed
+   * because by default we do not allow segment additions */
+  attach_args.options[APP_OPTIONS_ADD_SEGMENT_SIZE] = 32 << 20;
   attach_args.options[APP_OPTIONS_NAMESPACE_SECRET] = placeholder_secret;
   error = vnet_application_attach (&attach_args);
   SESSION_TEST ((error == 0), "server app attached: %U", format_clib_error,
@@ -1839,7 +1842,7 @@ session_test_mq_speed (vlib_main_t * vm, unformat_input_t * input)
       SESSION_TEST (prod_fd != -1, "mq producer eventd valid %u", prod_fd);
     }
 
-  sm = app_worker_get_or_alloc_connect_segment_manager (app_wrk);
+  sm = app_worker_get_connect_segment_manager (app_wrk);
   segment_manager_alloc_session_fifos (sm, 0, &rx_fifo, &tx_fifo);
   s.rx_fifo = rx_fifo;
   s.tx_fifo = tx_fifo;