commit 8ae63db02066a2b5ac18a89fd63dc0dd2a811ab3
author Florin Coras <fcoras@cisco.com> Mon Mar 18 12:25:38 2024 -0700
committer Dave Barach <vpp@barachs.net> Mon Mar 25 18:53:05 2024 +0000
tree 0d7877f1c8bd18ce9dd4f32cfddfa3e4f557bc35
parent a8d266a7a4bf1188739dcd6d3ddcc8173282d95d

vcl: add api to retrieve num bytes for tx

Type: improvement
Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Iaa1b026e2baea1c03f8c75e7d6879d0ff6d379d6

src/vcl/ldp.c

diff --git a/src/vcl/ldp.c b/src/vcl/ldp.c
index 566b5a8..bd3457f 100644
--- a/src/vcl/ldp.c
+++ b/src/vcl/ldp.c
@@ -613,7 +613,13 @@
 	case FIONREAD:
 	  rv = vls_attr (vlsh, VPPCOM_ATTR_GET_NREAD, 0, 0);
 	  break;
-
+	case TIOCOUTQ:
+	  {
+	    u32 *buf = va_arg (ap, void *);
+	    u32 *buflen = va_arg (ap, u32 *);
+	    rv = vls_attr (vlsh, VPPCOM_ATTR_GET_NWRITEQ, buf, buflen);
+	  }
+	  break;
 	case FIONBIO:
 	  {
 	    u32 flags = *(va_arg (ap, int *)) ? O_NONBLOCK : 0;

src/vcl/vppcom.c

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index a0a0336..a0bbae1 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -3585,7 +3585,19 @@
       VDBG (2, "VPPCOM_ATTR_GET_NWRITE: sh %u, nwrite = %d", session_handle,
 	    rv);
       break;
-
+    case VPPCOM_ATTR_GET_NWRITEQ:
+      if (PREDICT_FALSE (!buffer || !buflen || *buflen != sizeof (int)))
+	{
+	  rv = VPPCOM_EINVAL;
+	  break;
+	}
+      if (!session->tx_fifo || session->session_state == VCL_STATE_DETACHED)
+	{
+	  rv = VPPCOM_EINVAL;
+	  break;
+	}
+      *(int *) buffer = svm_fifo_max_dequeue (session->tx_fifo);
+      break;
     case VPPCOM_ATTR_GET_FLAGS:
       if (PREDICT_TRUE (buffer && buflen && (*buflen >= sizeof (*flags))))
 	{

src/vcl/vppcom.h

diff --git a/src/vcl/vppcom.h b/src/vcl/vppcom.h
index 5683cb2..386d7d0 100644
--- a/src/vcl/vppcom.h
+++ b/src/vcl/vppcom.h
@@ -184,6 +184,7 @@
   VPPCOM_ATTR_SET_IP_PKTINFO,
   VPPCOM_ATTR_GET_IP_PKTINFO,
   VPPCOM_ATTR_GET_ORIGINAL_DST,
+  VPPCOM_ATTR_GET_NWRITEQ,
 } vppcom_attr_op_t;
 
 typedef struct _vcl_poll