[sflow]Changing the verbosity of ERR log when interface is unavailable

src/sflow/hsflowd/patch/0004-When-interface-removed-just-as-we-discover-it-log-wi.patch

@@ -0,0 +1,33 @@
+From 3d6a3a02d12bcd742e9bcd701cb77da5f265adee Mon Sep 17 00:00:00 2001
+From: Neil McKee <[email protected]>
+Date: Fri, 26 Apr 2024 11:05:19 -0700
+Subject: [PATCH] When interface removed just as we discover it, log with
+ LOG_INFO, not LOG_ERR.
+
+
+diff --git a/src/Linux/readInterfaces.c b/src/Linux/readInterfaces.c
+index 438d8ed..06427eb 100644
+--- a/src/Linux/readInterfaces.c
++++ b/src/Linux/readInterfaces.c
+@@ -758,7 +758,8 @@ extern "C" {
+
+       // Get the flags for this interface
+       if(ioctl(fd,SIOCGIFFLAGS, &ifr) < 0) {
+-	myLog(LOG_ERR, "device %s Get SIOCGIFFLAGS failed : %s",
++	// Can get here if the interface was just removed under our feet.
++	myLog(LOG_INFO, "device %s Get SIOCGIFFLAGS failed : %s",
+ 	      devName,
+ 	      strerror(errno));
+ 	continue;
+@@ -781,7 +782,7 @@ extern "C" {
+       u_char macBytes[6];
+       int gotMac = NO;
+       if(ioctl(fd,SIOCGIFHWADDR, &ifr) < 0) {
+-	myLog(LOG_ERR, "device %s Get SIOCGIFHWADDR failed : %s",
++	myLog(LOG_INFO, "device %s Get SIOCGIFHWADDR failed : %s",
+ 	      devName,
+ 	      strerror(errno));
+       }
+-- 
+2.30.2
+

src/sflow/hsflowd/patch/series

@@ -1,3 +1,4 @@
 0001-host_sflow_psample.patch
 0002-host_sflow_debian.patch
 0003-sflow-enabled-drop-monitor-support-for-SONiC.patch
+0004-When-interface-removed-just-as-we-discover-it-log-wi.patch