Add back monitoring for time skips, forward as well as backward.

This serviceability tool was lost during the migration from the old eventsystem to the tevent system.

diff --git a/lib/tevent/tevent.c b/lib/tevent/tevent.c
index 8cc9ce5203c4e8a8873e32eabcfaf7781ddac927..2f6e591baad7b4f2a9466065e126430972f08b46 100644 (file)
--- a/lib/tevent/tevent.c
+++ b/lib/tevent/tevent.c
@@ -64,6 +64,9 @@
 #include "tevent_internal.h"
 #include "tevent_util.h"
 
+/* needed for the special ctdbd "track if time jumps unexpectedly */
+#include <time.h>
+
 struct tevent_ops_list {
        struct tevent_ops_list *next, *prev;
        const char *name;
@@ -578,12 +581,18 @@ done:
        return ret;
 }
 
+
+extern pid_t ctdbd_pid;
+
 /*
   return on failure or (with 0) if all fd events are removed
 */
 int tevent_common_loop_wait(struct tevent_context *ev,
                            const char *location)
 {
+       static time_t t=0;
+       time_t new_t;
+
        /*
         * loop as long as we have events pending
         */
@@ -599,6 +608,19 @@ int tevent_common_loop_wait(struct tevent_context *ev,
                                     ret, strerror(errno));
                        return ret;
                }
+               if (getpid() == ctdbd_pid) {
+                       new_t=time(NULL);
+                       if (t != 0) {
+                               if (t > new_t) {
+                                       tevent_debug(ev, TEVENT_DEBUG_FATAL, __location__ " ERROR Time skipped backward by %d seconds\n", (int)(t-new_t));
+                               }
+                               /* We assume here that we get at least one event every 3 seconds */
+                               if (new_t > (t+3)) {
+                                       tevent_debug(ev, TEVENT_DEBUG_FATAL, __location__ " ERROR Time jumped forward by %d seconds\n", (int)(new_t-t));
+                               }
+                       }
+                       t=new_t;
+               }
        }
 
        tevent_debug(ev, TEVENT_DEBUG_WARNING,