From: Ben Pfaff <blp@nicira.com>
Date: Sat, 9 Jan 2010 00:10:01 +0000 (-0800)
Subject: sflow: Set proper output port number for dropped packets.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=216114e062b4ee108ff38c6959ff81d166d51368;p=openvswitch

sflow: Set proper output port number for dropped packets.

Based on advice from Neil McKee.
---

diff --git a/ofproto/ofproto-sflow.c b/ofproto/ofproto-sflow.c
index 29f7e345..cf63c655 100644
--- a/ofproto/ofproto-sflow.c
+++ b/ofproto/ofproto-sflow.c
@@ -535,7 +535,11 @@ ofproto_sflow_received(struct ofproto_sflow *os, struct odp_msg *msg)
             break;
         }
     }
-    if (n_outputs > 1 || !fs.output) {
+    if (!n_outputs) {
+        /* This value indicates that the packet was dropped for an unknown
+         * reason. */
+        fs.output = 0x40000000 | 256;
+    } else if (n_outputs > 1 || !fs.output) {
         /* Setting the high bit means "multiple output ports". */
         fs.output = 0x80000000 | n_outputs;
     }