MINOR: log: make sess_log() support sess=NULL

At many places in muxes we'll have to add tests to check if the
connection is front or back before deciding to log. Instead let's
centralize this test in sess_log() to simply do nothing when sess=NULL.

diff --git a/src/log.c b/src/log.c
index 32308fa020ade346e3b2d0e1ef506d691f39cdd7..cd9ff01b996b5db7a9bb6b6bc7855a58cbbfc7ff 100644 (file)
--- a/src/log.c
+++ b/src/log.c
@@ -2684,13 +2684,17 @@ void strm_log(struct stream *s)
  * cannot lead to the creation of a regular stream. Because of this the log
  * level is LOG_INFO or LOG_ERR depending on the "log-separate-error" setting
  * in the frontend. The caller must simply know that it should not call this
- * function to report unimportant events.
+ * function to report unimportant events. It is safe to call this function with
+ * sess==NULL (will not do anything).
  */
 void sess_log(struct session *sess)
 {
        int size, level;
        int sd_size = 0;
 
+       if (!sess)
+               return;
+
        if (LIST_ISEMPTY(&sess->fe->logsrvs))
                return;