[syncd] Add MetadataLogger class

Author: kcudnik

syncd/MetadataLogger.cpp

@@ -0,0 +1,81 @@
+#include "MetadataLogger.h"
+
+extern "C"{
+#include "saimetadata.h"
+}
+
+#include "swss/logger.h"
+
+#include <stdarg.h>
+
+#define MAX_BUFFER_LENGTH (0x1000)
+
+using namespace syncd;
+
+static void sai_meta_log_syncd(
+        _In_ sai_log_level_t logLevel,
+        _In_ const char *file,
+        _In_ int line,
+        _In_ const char *func,
+        _In_ const char *format,
+        ...)
+    __attribute__ ((format (printf, 5, 6)));
+
+static void sai_meta_log_syncd(
+        _In_ sai_log_level_t logLevel,
+        _In_ const char *file,
+        _In_ int line,
+        _In_ const char *func,
+        _In_ const char *format,
+        ...)
+{
+    // SWSS_LOG_ENTER() is omitted since this is logging for metadata
+
+    char buffer[MAX_BUFFER_LENGTH];
+
+    va_list ap;
+    va_start(ap, format);
+    vsnprintf(buffer, MAX_BUFFER_LENGTH, format, ap);
+    va_end(ap);
+
+    swss::Logger::Priority priority = swss::Logger::SWSS_NOTICE;
+
+    switch (logLevel)
+    {
+        case SAI_LOG_LEVEL_DEBUG:
+            priority = swss::Logger::SWSS_DEBUG;
+            break;
+        case SAI_LOG_LEVEL_INFO:
+            priority = swss::Logger::SWSS_INFO;
+            break;
+        case SAI_LOG_LEVEL_ERROR:
+            priority = swss::Logger::SWSS_ERROR;
+            fprintf(stderr, "ERROR: %s: %s", func, buffer);
+            break;
+        case SAI_LOG_LEVEL_WARN:
+            priority = swss::Logger::SWSS_WARN;
+            fprintf(stderr, "WARN: %s: %s", func, buffer);
+            break;
+        case SAI_LOG_LEVEL_CRITICAL:
+            priority = swss::Logger::SWSS_CRIT;
+            break;
+
+        default:
+            priority = swss::Logger::SWSS_NOTICE;
+            break;
+    }
+
+    swss::Logger::getInstance().write(priority, ":- %s: %s", func, buffer);
+}
+
+void MetadataLogger::initialize()
+{
+    SWSS_LOG_ENTER();
+
+    SWSS_LOG_NOTICE("initializeing metadata log function");
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wsuggest-attribute=format"
+    sai_metadata_log = &sai_meta_log_syncd;
+#pragma GCC diagnostic pop
+}

syncd/MetadataLogger.h

@@ -0,0 +1,16 @@
+#pragma once
+
+namespace syncd
+{
+    class MetadataLogger
+    {
+        private:
+
+            MetadataLogger() = delete;
+            ~MetadataLogger() = delete;
+
+        public:
+
+            static void initialize();
+    };
+}