vcl: support for eventfd mq signaling

[vpp.git] / src / vnet / session / application_interface.h

diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index ffe2a64..ba6d266 100644 (file)
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -42,7 +42,7 @@ typedef struct _vnet_app_attach_args_t
    * Results
    */
   ssvm_private_t *segment;
-  u64 app_event_queue_address;
+  svm_msg_q_t *app_evt_q;
   u32 app_index;
 } vnet_app_attach_args_t;
 
@@ -138,6 +138,7 @@ typedef enum
   _(USE_GLOBAL_SCOPE, "App can use global session scope")      \
   _(USE_LOCAL_SCOPE, "App can use local session scope")                \
   _(USE_MQ_FOR_CTRL_MSGS, "Use message queue for ctr msgs")    \
+  _(EVT_MQ_USE_EVENTFD, "Use eventfds for signaling")          \
 
 typedef enum _app_options
 {
@@ -153,6 +154,27 @@ typedef enum _app_options_flags
 #undef _
 } app_options_flags_t;
 
+#define foreach_fd_type                                                \
+  _(VPP_MQ_SEGMENT, "Fd for vpp's event mq segment")           \
+  _(MEMFD_SEGMENT, "Fd for memfd segment")                     \
+  _(MQ_EVENTFD, "Event fd used by message queue")              \
+  _(VPP_MQ_EVENTFD, "Event fd used by vpp's message queue")    \
+
+typedef enum session_fd_type_
+{
+#define _(sym, str) SESSION_FD_##sym,
+  foreach_fd_type
+#undef _
+  SESSION_N_FD_TYPE
+} session_fd_type_t;
+
+typedef enum session_fd_flag_
+{
+#define _(sym, str) SESSION_FD_F_##sym = 1 << SESSION_FD_##sym,
+  foreach_fd_type
+#undef _
+} session_fd_flag_t;
+
 int vnet_bind_uri (vnet_bind_args_t *);
 int vnet_unbind_uri (vnet_unbind_args_t * a);
 clib_error_t *vnet_connect_uri (vnet_connect_args_t * a);
@@ -354,7 +376,8 @@ app_send_io_evt_to_vpp (svm_msg_q_t * mq, svm_fifo_t * f, u8 evt_type,
 
 always_inline int
 app_send_dgram_raw (svm_fifo_t * f, app_session_transport_t * at,
-                   svm_msg_q_t * vpp_evt_q, u8 * data, u32 len, u8 noblock)
+                   svm_msg_q_t * vpp_evt_q, u8 * data, u32 len, u8 evt_type,
+                   u8 noblock)
 {
   u32 max_enqueue, actual_write;
   session_dgram_hdr_t hdr;
@@ -379,7 +402,7 @@ app_send_dgram_raw (svm_fifo_t * f, app_session_transport_t * at,
   if ((rv = svm_fifo_enqueue_nowait (f, actual_write, data)) > 0)
     {
       if (svm_fifo_set_event (f))
-       app_send_io_evt_to_vpp (vpp_evt_q, f, FIFO_EVENT_APP_TX, noblock);
+       app_send_io_evt_to_vpp (vpp_evt_q, f, evt_type, noblock);
     }
   ASSERT (rv);
   return rv;
@@ -389,19 +412,19 @@ always_inline int
 app_send_dgram (app_session_t * s, u8 * data, u32 len, u8 noblock)
 {
   return app_send_dgram_raw (s->tx_fifo, &s->transport, s->vpp_evt_q, data,
-                            len, noblock);
+                            len, FIFO_EVENT_APP_TX, noblock);
 }
 
 always_inline int
 app_send_stream_raw (svm_fifo_t * f, svm_msg_q_t * vpp_evt_q, u8 * data,
-                    u32 len, u8 noblock)
+                    u32 len, u8 evt_type, u8 noblock)
 {
   int rv;
 
   if ((rv = svm_fifo_enqueue_nowait (f, len, data)) > 0)
     {
       if (svm_fifo_set_event (f))
-       app_send_io_evt_to_vpp (vpp_evt_q, f, FIFO_EVENT_APP_TX, noblock);
+       app_send_io_evt_to_vpp (vpp_evt_q, f, evt_type, noblock);
     }
   return rv;
 }
@@ -409,7 +432,8 @@ app_send_stream_raw (svm_fifo_t * f, svm_msg_q_t * vpp_evt_q, u8 * data,
 always_inline int
 app_send_stream (app_session_t * s, u8 * data, u32 len, u8 noblock)
 {
-  return app_send_stream_raw (s->tx_fifo, s->vpp_evt_q, data, len, noblock);
+  return app_send_stream_raw (s->tx_fifo, s->vpp_evt_q, data, len,
+                             FIFO_EVENT_APP_TX, noblock);
 }
 
 always_inline int
@@ -422,17 +446,22 @@ app_send (app_session_t * s, u8 * data, u32 len, u8 noblock)
 
 always_inline int
 app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len,
-                   app_session_transport_t * at, u8 clear_evt)
+                   app_session_transport_t * at, u8 clear_evt, u8 peek)
 {
   session_dgram_pre_hdr_t ph;
   u32 max_deq;
   int rv;
 
-  if (clear_evt)
-    svm_fifo_unset_event (f);
   max_deq = svm_fifo_max_dequeue (f);
   if (max_deq < sizeof (session_dgram_hdr_t))
-    return 0;
+    {
+      if (clear_evt)
+       svm_fifo_unset_event (f);
+      return 0;
+    }
+
+  if (clear_evt)
+    svm_fifo_unset_event (f);
 
   svm_fifo_peek (f, 0, sizeof (ph), (u8 *) & ph);
   ASSERT (ph.data_length >= ph.data_offset);
@@ -440,6 +469,8 @@ app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len,
     svm_fifo_peek (f, sizeof (ph), sizeof (*at), (u8 *) at);
   len = clib_min (len, ph.data_length - ph.data_offset);
   rv = svm_fifo_peek (f, ph.data_offset + SESSION_CONN_HDR_LEN, len, buf);
+  if (peek)
+    return rv;
   ph.data_offset += rv;
   if (ph.data_offset == ph.data_length)
     svm_fifo_dequeue_drop (f, ph.data_length + SESSION_CONN_HDR_LEN);
@@ -451,21 +482,25 @@ app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len,
 always_inline int
 app_recv_dgram (app_session_t * s, u8 * buf, u32 len)
 {
-  return app_recv_dgram_raw (s->rx_fifo, buf, len, &s->transport, 1);
+  return app_recv_dgram_raw (s->rx_fifo, buf, len, &s->transport, 1, 0);
 }
 
 always_inline int
-app_recv_stream_raw (svm_fifo_t * f, u8 * buf, u32 len, u8 clear_evt)
+app_recv_stream_raw (svm_fifo_t * f, u8 * buf, u32 len, u8 clear_evt, u8 peek)
 {
   if (clear_evt)
     svm_fifo_unset_event (f);
+
+  if (peek)
+    return svm_fifo_peek (f, 0, len, buf);
+
   return svm_fifo_dequeue_nowait (f, len, buf);
 }
 
 always_inline int
 app_recv_stream (app_session_t * s, u8 * buf, u32 len)
 {
-  return app_recv_stream_raw (s->rx_fifo, buf, len, 1);
+  return app_recv_stream_raw (s->rx_fifo, buf, len, 1, 0);
 }
 
 always_inline int