Fix journald PRIORITY values

The systemd journal expects log record PRIORITY values to
be encoded using the syslog compatible numbering scheme,
not libvirt's own native numbering scheme. We must therefore
apply a conversion.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/util/virlog.c

@@ -1000,7 +1000,22 @@ virLogAddOutputToFile(virLogPriority priority,
 }
 
 
-#if HAVE_SYSLOG_H
+#if HAVE_SYSLOG_H || USE_JOURNALD
+
+/* Compat in case we build with journald, but no syslog */
+# ifndef LOG_DEBUG
+#  define LOG_DEBUG 7
+# endif
+# ifndef LOG_INFO
+#  define LOG_INFO 6
+# endif
+# ifndef LOG_WARNING
+#  define LOG_WARNING 4
+# endif
+# ifndef LOG_ERR
+#  define LOG_ERR 3
+# endif
+
 static int
 virLogPrioritySyslog(virLogPriority priority)
 {
@@ -1017,8 +1032,10 @@ virLogPrioritySyslog(virLogPriority priority)
         return LOG_ERR;
     }
 }
+#endif /* HAVE_SYSLOG_H || USE_JOURNALD */
 
 
+#if HAVE_SYSLOG_H
 static void
 virLogOutputToSyslog(virLogSource source ATTRIBUTE_UNUSED,
                      virLogPriority priority,
@@ -1187,7 +1204,8 @@ virLogOutputToJournald(virLogSource source,
     state.bufs_end = iov_bufs + ARRAY_CARDINALITY(iov_bufs);
 
     journalAddString(&state, "MESSAGE", rawstr);
-    journalAddInt(&state, "PRIORITY", priority);
+    journalAddInt(&state, "PRIORITY",
+                  virLogPrioritySyslog(priority));
     journalAddString(&state, "LIBVIRT_SOURCE",
                      virLogSourceTypeToString(source));
     if (filename)