CA-285194: ensure that tapdisk logs if it exits and also on opening i…

…ts control

Signed-off-by: Mark Syms <mark.syms@citrix.com>
Reviewed-by: Stefano Panella <stefano.panella@citrix.com>

drivers/tapdisk-log.c

@@ -212,6 +212,7 @@ tlog_open(const char *name, int facility, int level)
 	return 0;
 
 fail:
+        EPRINTF("tapdisk-log: failed %d\n", errno);
 	tlog_close();
 	return err;
 }

drivers/tapdisk-server.c

@@ -807,6 +807,8 @@ tapdisk_server_run()
 
 	server.tlog_reopen_evid = err;
 
+	err = 0;
+
 	__tapdisk_server_run();
 
 out:

drivers/tapdisk2.c

@@ -140,6 +140,8 @@ main(int argc, char *argv[])
 		goto out;
 	}
 
+	DPRINTF("Tapdisk running, control on %s\n", control);
+
 	fprintf(out, "%s\n", control);
 	fclose(out);
 
@@ -158,6 +160,9 @@ main(int argc, char *argv[])
 	err = tapdisk_server_run();
 
 out:
+	if (err) {
+		EPRINTF("Tapdisk exiting with error %d\n", err);
+	}
 	td_metrics_stop();
 	tdnbd_fdreceiver_stop();
 	tapdisk_control_close();