vcl: cleanup read and write ready

[vpp.git] / src / vcl / vcl_private.c

diff --git a/src/vcl/vcl_private.c b/src/vcl/vcl_private.c
index a1c252d..54187a7 100644 (file)
--- a/src/vcl/vcl_private.c
+++ b/src/vcl/vcl_private.c
@@ -228,9 +228,6 @@ vcl_worker_ctrl_mq (vcl_worker_t * wrk)
 int
 vcl_session_read_ready (vcl_session_t * s)
 {
-  u32 max_deq;
-
-  /* Assumes caller has acquired spinlock: vcm->sessions_lockp */
   if (PREDICT_FALSE (s->is_vep))
     {
       VDBG (0, "ERROR: session %u: cannot read from an epoll session!",
@@ -238,50 +235,43 @@ vcl_session_read_ready (vcl_session_t * s)
       return VPPCOM_EBADFD;
     }
 
-  if (PREDICT_FALSE (!(vcl_session_is_ready (s)
-                      || s->session_state == VCL_STATE_LISTEN)))
+  if (vcl_session_is_open (s))
     {
-      vcl_session_state_t state = s->session_state;
-      int rv;
+      if (vcl_session_is_ct (s))
+       return svm_fifo_max_dequeue_cons (s->ct_rx_fifo);
 
-      rv = (state == VCL_STATE_DISCONNECT) ?
-       VPPCOM_ECONNRESET : VPPCOM_ENOTCONN;
+      if (s->is_dgram)
+       {
+         session_dgram_pre_hdr_t ph;
+         u32 max_deq;
+
+         max_deq = svm_fifo_max_dequeue_cons (s->rx_fifo);
+         if (max_deq <= SESSION_CONN_HDR_LEN)
+           return 0;
+         if (svm_fifo_peek (s->rx_fifo, 0, sizeof (ph), (u8 *) & ph) < 0)
+           return 0;
+         if (ph.data_length + SESSION_CONN_HDR_LEN > max_deq)
+           return 0;
+
+         return ph.data_length;
+       }
 
-      VDBG (1, "session %u [0x%llx]: not open! state 0x%x (%s), ret %d (%s)",
-           s->session_index, s->vpp_handle, state,
-           vppcom_session_state_str (state), rv, vppcom_retval_str (rv));
-      return rv;
+      return svm_fifo_max_dequeue_cons (s->rx_fifo);
     }
-
-  if (s->session_state == VCL_STATE_LISTEN)
-    return clib_fifo_elts (s->accept_evts_fifo);
-
-  if (vcl_session_is_ct (s))
-    return svm_fifo_max_dequeue_cons (s->ct_rx_fifo);
-
-  max_deq = svm_fifo_max_dequeue_cons (s->rx_fifo);
-
-  if (s->is_dgram)
+  else if (s->session_state == VCL_STATE_LISTEN)
     {
-      session_dgram_pre_hdr_t ph;
-
-      if (max_deq <= SESSION_CONN_HDR_LEN)
-       return 0;
-      if (svm_fifo_peek (s->rx_fifo, 0, sizeof (ph), (u8 *) & ph) < 0)
-       return 0;
-      if (ph.data_length + SESSION_CONN_HDR_LEN > max_deq)
-       return 0;
-
-      return ph.data_length;
+      return clib_fifo_elts (s->accept_evts_fifo);
+    }
+  else
+    {
+      return (s->session_state == VCL_STATE_DISCONNECT) ?
+       VPPCOM_ECONNRESET : VPPCOM_ENOTCONN;
     }
-
-  return max_deq;
 }
 
 int
 vcl_session_write_ready (vcl_session_t * s)
 {
-  /* Assumes caller has acquired spinlock: vcm->sessions_lockp */
   if (PREDICT_FALSE (s->is_vep))
     {
       VDBG (0, "session %u [0x%llx]: cannot write to an epoll session!",
@@ -289,40 +279,34 @@ vcl_session_write_ready (vcl_session_t * s)
       return VPPCOM_EBADFD;
     }
 
-  if (PREDICT_FALSE (s->session_state == VCL_STATE_LISTEN))
+  if (vcl_session_is_open (s))
+    {
+      if (vcl_session_is_ct (s))
+       return svm_fifo_max_enqueue_prod (s->ct_tx_fifo);
+
+      if (s->is_dgram)
+       {
+         u32 max_enq = svm_fifo_max_enqueue_prod (s->tx_fifo);
+
+         if (max_enq <= sizeof (session_dgram_hdr_t))
+           return 0;
+         return max_enq - sizeof (session_dgram_hdr_t);
+       }
+
+      return svm_fifo_max_enqueue_prod (s->tx_fifo);
+    }
+  else if (s->session_state == VCL_STATE_LISTEN)
     {
       if (s->tx_fifo)
        return svm_fifo_max_enqueue_prod (s->tx_fifo);
       else
        return VPPCOM_EBADFD;
     }
-
-  if (PREDICT_FALSE (!vcl_session_is_ready (s)))
+  else
     {
-      vcl_session_state_t state = s->session_state;
-      int rv;
-
-      rv = (state == VCL_STATE_DISCONNECT) ?
+      return (s->session_state == VCL_STATE_DISCONNECT) ?
        VPPCOM_ECONNRESET : VPPCOM_ENOTCONN;
-      VDBG (0, "session %u [0x%llx]: not open! state 0x%x (%s), ret %d (%s)",
-           s->session_index, s->vpp_handle, state,
-           vppcom_session_state_str (state), rv, vppcom_retval_str (rv));
-      return rv;
     }
-
-  if (vcl_session_is_ct (s))
-    return svm_fifo_max_enqueue_prod (s->ct_tx_fifo);
-
-  if (s->is_dgram)
-    {
-      u32 max_enq = svm_fifo_max_enqueue_prod (s->tx_fifo);
-
-      if (max_enq <= sizeof (session_dgram_hdr_t))
-       return 0;
-      return max_enq - sizeof (session_dgram_hdr_t);
-    }
-
-  return svm_fifo_max_enqueue_prod (s->tx_fifo);
 }
 
 int