vcl/session: tx notifications for cut-thru sessions
[vpp.git] / src / vnet / session / session_node.c
index 7855bf8..605fd58 100644 (file)
 #include <vnet/session/session_debug.h>
 #include <svm/queue.h>
 
+static void session_mq_accepted_reply_handler (void *data);
+
+static void
+accepted_notify_cb (void *data, u32 data_len)
+{
+  session_mq_accepted_reply_handler (data);
+}
+
 static void
 session_mq_accepted_reply_handler (void *data)
 {
@@ -32,7 +40,6 @@ session_mq_accepted_reply_handler (void *data)
   vnet_disconnect_args_t _a = { 0 }, *a = &_a;
   session_state_t old_state;
   app_worker_t *app_wrk;
-  local_session_t *ls;
   session_t *s;
 
   /* Server isn't interested, kill the session */
@@ -44,48 +51,45 @@ session_mq_accepted_reply_handler (void *data)
       return;
     }
 
-  if (session_handle_is_local (mp->handle))
+  /* Mail this back from the main thread. We're not polling in main
+   * thread so we're using other workers for notifications. */
+  if (vlib_num_workers () && vlib_get_thread_index () != 0
+      && session_thread_from_handle (mp->handle) == 0)
     {
-      ls = app_worker_get_local_session_from_handle (mp->handle);
-      if (!ls)
-       {
-         clib_warning ("unknown local handle 0x%lx", mp->handle);
-         return;
-       }
-      app_wrk = app_worker_get (ls->app_wrk_index);
-      if (app_wrk->app_index != mp->context)
-       {
-         clib_warning ("server %u doesn't own local handle 0x%lx",
-                       mp->context, mp->handle);
-         return;
-       }
-      if (app_worker_local_session_connect_notify (ls))
+      vl_api_rpc_call_main_thread (accepted_notify_cb, data,
+                                  sizeof (session_accepted_reply_msg_t));
+      return;
+    }
+
+  s = session_get_from_handle_if_valid (mp->handle);
+  if (!s)
+    return;
+
+  app_wrk = app_worker_get (s->app_wrk_index);
+  if (app_wrk->app_index != mp->context)
+    {
+      clib_warning ("app doesn't own session");
+      return;
+    }
+
+  if (!session_has_transport (s))
+    {
+      s->session_state = SESSION_STATE_READY;
+      if (ct_session_connect_notify (s))
        return;
-      ls->session_state = SESSION_STATE_READY;
     }
   else
     {
-      s = session_get_from_handle_if_valid (mp->handle);
-      if (!s)
-       return;
-
-      app_wrk = app_worker_get (s->app_wrk_index);
-      if (app_wrk->app_index != mp->context)
-       {
-         clib_warning ("app doesn't own session");
-         return;
-       }
-
       old_state = s->session_state;
       s->session_state = SESSION_STATE_READY;
-      if (!svm_fifo_is_empty (s->rx_fifo))
-       app_worker_lock_and_send_event (app_wrk, s, FIFO_EVENT_APP_RX);
+
+      if (!svm_fifo_is_empty_prod (s->rx_fifo))
+       app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
 
       /* Closed while waiting for app to reply. Resend disconnect */
       if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
        {
-         application_t *app = application_get (app_wrk->app_index);
-         app->cb_fns.session_disconnect_callback (s);
+         app_worker_close_notify (app_wrk, s);
          s->session_state = old_state;
          return;
        }
@@ -279,13 +283,13 @@ session_mq_worker_update_handler (void *data)
    * Retransmit messages that may have been lost
    */
   if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
-    session_send_io_evt_to_thread (s->tx_fifo, FIFO_EVENT_APP_TX);
+    session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
 
   if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
-    app_worker_lock_and_send_event (app_wrk, s, FIFO_EVENT_APP_RX);
+    app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
 
   if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
-    app->cb_fns.session_disconnect_callback (s);
+    app_worker_close_notify (app_wrk, s);
 }
 
 vlib_node_registration_t session_queue_node;
@@ -361,11 +365,11 @@ session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
 {
   vlib_buffer_t *chain_b, *prev_b;
   u32 chain_bi0, to_deq, left_from_seg;
-  session_manager_worker_t *wrk;
+  session_worker_t *wrk;
   u16 len_to_deq, n_bytes_read;
   u8 *data, j;
 
-  wrk = session_manager_get_worker (ctx->s->thread_index);
+  wrk = session_main_get_worker (ctx->s->thread_index);
   b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
   b->total_length_not_including_first_buffer = 0;
 
@@ -506,7 +510,7 @@ session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
 
   /* *INDENT-OFF* */
   SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
-       ed->data[0] = FIFO_EVENT_APP_TX;
+       ed->data[0] = SESSION_IO_EVT_TX;
        ed->data[1] = ctx->max_dequeue;
        ed->data[2] = len_to_deq;
        ed->data[3] = ctx->left_to_snd;
@@ -554,7 +558,7 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
                               u32 max_segs, u8 peek_data)
 {
   u32 n_bytes_per_buf, n_bytes_per_seg;
-  ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->tx_fifo);
+  ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
   if (peek_data)
     {
       /* Offset in rx fifo from where to peek data */
@@ -618,13 +622,13 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
 
 always_inline int
 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
-                               session_manager_worker_t * wrk,
+                               session_worker_t * wrk,
                                session_event_t * e, int *n_tx_packets,
                                u8 peek_data)
 {
   u32 next_index, next0, next1, *to_next, n_left_to_next, n_left, pbi;
   u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
-  session_manager_main_t *smm = &session_manager_main;
+  session_main_t *smm = &session_main;
   session_tx_context_t *ctx = &wrk->ctx;
   transport_proto_t tp;
   vlib_buffer_t *pb;
@@ -785,7 +789,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
        svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
                                 sizeof (session_dgram_pre_hdr_t));
       /* More data needs to be read */
-      else if (svm_fifo_max_dequeue (ctx->s->tx_fifo) > 0)
+      else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
        if (svm_fifo_set_event (ctx->s->tx_fifo))
          vec_add1 (wrk->pending_event_vector, *e);
     }
@@ -794,7 +798,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
 
 int
 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
-                             session_manager_worker_t * wrk,
+                             session_worker_t * wrk,
                              session_event_t * e, int *n_tx_pkts)
 {
   return session_tx_fifo_read_and_snd_i (vm, node, wrk, e, n_tx_pkts, 1);
@@ -802,7 +806,7 @@ session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
 
 int
 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
-                                session_manager_worker_t * wrk,
+                                session_worker_t * wrk,
                                 session_event_t * e, int *n_tx_pkts)
 {
   return session_tx_fifo_read_and_snd_i (vm, node, wrk, e, n_tx_pkts, 0);
@@ -811,27 +815,25 @@ session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
 int
 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
                                  vlib_node_runtime_t * node,
-                                 session_manager_worker_t * wrk,
+                                 session_worker_t * wrk,
                                  session_event_t * e, int *n_tx_pkts)
 {
   session_t *s = wrk->ctx.s;
-  application_t *app;
 
-  if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
+  if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
     return 0;
-  app = application_get (s->t_app_index);
   svm_fifo_unset_event (s->tx_fifo);
-  return app->cb_fns.builtin_app_tx_callback (s);
+  return transport_custom_tx (session_get_transport_proto (s), s);
 }
 
 always_inline session_t *
 session_event_get_session (session_event_t * e, u8 thread_index)
 {
-  return session_get_if_valid (e->fifo->master_session_index, thread_index);
+  return session_get_if_valid (e->session_index, thread_index);
 }
 
 static void
-session_update_dispatch_period (session_manager_worker_t * wrk, f64 now,
+session_update_dispatch_period (session_worker_t * wrk, f64 now,
                                u32 thread_index)
 {
   if (wrk->last_tx_packets)
@@ -846,15 +848,14 @@ static uword
 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
                       vlib_frame_t * frame)
 {
-  session_manager_main_t *smm = vnet_get_session_manager_main ();
+  session_main_t *smm = vnet_get_session_main ();
   u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
-  session_manager_worker_t *wrk = &smm->wrk[thread_index];
+  session_worker_t *wrk = &smm->wrk[thread_index];
   session_event_t *e, *fifo_events;
   svm_msg_q_msg_t _msg, *msg = &_msg;
   f64 now = vlib_time_now (vm);
   int n_tx_packets = 0, i, rv;
   app_worker_t *app_wrk;
-  application_t *app;
   svm_msg_q_t *mq;
   void (*fp) (void *);
 
@@ -912,7 +913,7 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
       switch (e->event_type)
        {
        case SESSION_IO_EVT_TX_FLUSH:
-       case FIFO_EVENT_APP_TX:
+       case SESSION_IO_EVT_TX:
          /* Don't try to send more that one frame per dispatch cycle */
          if (n_tx_packets == VLIB_FRAME_SIZE)
            {
@@ -926,6 +927,7 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
              clib_warning ("session was freed!");
              continue;
            }
+         CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
          wrk->ctx.s = s;
          /* Spray packets in per session type frames, since they go to
           * different nodes */
@@ -945,7 +947,14 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
              continue;
            }
          break;
-       case FIFO_EVENT_DISCONNECT:
+       case SESSION_IO_EVT_RX:
+         s = session_event_get_session (e, thread_index);
+         if (!s)
+           break;
+         transport_app_rx_evt (session_get_transport_proto (s),
+                               s->connection_index, s->thread_index);
+         break;
+       case SESSION_CTRL_EVT_CLOSE:
          s = session_get_from_handle_if_valid (e->session_handle);
          if (PREDICT_FALSE (!s))
            break;
@@ -955,7 +964,8 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
           * and the tx queue is still not empty, try to wait for some
           * dispatch cycles */
          if (!e->postponed
-             || (e->postponed < 200 && svm_fifo_max_dequeue (s->tx_fifo)))
+             || (e->postponed < 200
+                 && svm_fifo_max_dequeue_cons (s->tx_fifo)))
            {
              e->postponed += 1;
              vec_add1 (wrk->pending_disconnects, *e);
@@ -964,23 +974,22 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 
          session_transport_close (s);
          break;
-       case FIFO_EVENT_BUILTIN_RX:
+       case SESSION_IO_EVT_BUILTIN_RX:
          s = session_event_get_session (e, thread_index);
          if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
            continue;
          svm_fifo_unset_event (s->rx_fifo);
          app_wrk = app_worker_get (s->app_wrk_index);
-         app = application_get (app_wrk->app_index);
-         app->cb_fns.builtin_app_rx_callback (s);
+         app_worker_builtin_rx (app_wrk, s);
          break;
-       case FIFO_EVENT_BUILTIN_TX:
+       case SESSION_IO_EVT_BUILTIN_TX:
          s = session_get_from_handle_if_valid (e->session_handle);
          wrk->ctx.s = s;
          if (PREDICT_TRUE (s != 0))
            session_tx_fifo_dequeue_internal (vm, node, wrk, e,
                                              &n_tx_packets);
          break;
-       case FIFO_EVENT_RPC:
+       case SESSION_CTRL_EVT_RPC:
          fp = e->rpc_args.fp;
          (*fp) (e->rpc_args.arg);
          break;
@@ -1034,7 +1043,7 @@ VLIB_REGISTER_NODE (session_queue_node) =
 void
 dump_thread_0_event_queue (void)
 {
-  session_manager_main_t *smm = vnet_get_session_manager_main ();
+  session_main_t *smm = vnet_get_session_main ();
   vlib_main_t *vm = &vlib_global_main;
   u32 my_thread_index = vm->thread_index;
   session_event_t _e, *e = &_e;
@@ -1055,23 +1064,23 @@ dump_thread_0_event_queue (void)
 
       switch (e->event_type)
        {
-       case FIFO_EVENT_APP_TX:
+       case SESSION_IO_EVT_TX:
          s0 = session_event_get_session (e, my_thread_index);
          fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
          break;
 
-       case FIFO_EVENT_DISCONNECT:
+       case SESSION_CTRL_EVT_CLOSE:
          s0 = session_get_from_handle (e->session_handle);
          fformat (stdout, "[%04d] disconnect session %d\n", i,
                   s0->session_index);
          break;
 
-       case FIFO_EVENT_BUILTIN_RX:
+       case SESSION_IO_EVT_BUILTIN_RX:
          s0 = session_event_get_session (e, my_thread_index);
          fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
          break;
 
-       case FIFO_EVENT_RPC:
+       case SESSION_CTRL_EVT_RPC:
          fformat (stdout, "[%04d] RPC call %llx with %llx\n",
                   i, (u64) (uword) (e->rpc_args.fp),
                   (u64) (uword) (e->rpc_args.arg));
@@ -1096,15 +1105,15 @@ session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
   session_t *s;
   switch (e->event_type)
     {
-    case FIFO_EVENT_APP_RX:
-    case FIFO_EVENT_APP_TX:
-    case FIFO_EVENT_BUILTIN_RX:
-      if (e->fifo == f)
+    case SESSION_IO_EVT_RX:
+    case SESSION_IO_EVT_TX:
+    case SESSION_IO_EVT_BUILTIN_RX:
+      if (e->session_index == f->master_session_index)
        return 1;
       break;
-    case FIFO_EVENT_DISCONNECT:
+    case SESSION_CTRL_EVT_CLOSE:
       break;
-    case FIFO_EVENT_RPC:
+    case SESSION_CTRL_EVT_RPC:
       s = session_get_from_handle (e->session_handle);
       if (!s)
        {
@@ -1124,7 +1133,7 @@ u8
 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
 {
   session_event_t *pending_event_vector, *evt;
-  session_manager_worker_t *wrk;
+  session_worker_t *wrk;
   int i, index, found = 0;
   svm_msg_q_msg_t *msg;
   svm_msg_q_ring_t *ring;
@@ -1133,7 +1142,7 @@ session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
 
   ASSERT (e);
   thread_index = f->master_thread_index;
-  wrk = session_manager_get_worker (thread_index);
+  wrk = session_main_get_worker (thread_index);
 
   /*
    * Search evt queue
@@ -1230,6 +1239,26 @@ VLIB_REGISTER_NODE (session_queue_process_node) =
 };
 /* *INDENT-ON* */
 
+static_always_inline uword
+session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+                               vlib_frame_t * frame)
+{
+  session_main_t *sm = &session_main;
+  if (!sm->wrk[0].vpp_event_queue)
+    return 0;
+  return session_queue_node_fn (vm, node, frame);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (session_queue_pre_input_node) =
+{
+  .function = session_queue_pre_input_inline,
+  .type = VLIB_NODE_TYPE_PRE_INPUT,
+  .name = "session-queue-main",
+  .state = VLIB_NODE_STATE_DISABLED,
+};
+/* *INDENT-ON* */
+
 /*
  * fd.io coding-style-patch-verification: ON
  *