X-Git-Url: http://git.tuebingen.mpg.de/?p=dss.git;a=blobdiff_plain;f=dss.c;h=9f39324500ffa915af5e0c593ae7d56d40eb5062;hp=237208b7da0a0f3a8f14c2e86c4cbce7cb1fe735;hb=b76728084d7b36d55e08764c9de42ad59fd6f6fd;hpb=20f8c7d5e2b7985137e89143005f4b7b15ae59d4

diff --git a/dss.c b/dss.c
index 237208b..9f39324 100644
--- a/dss.c
+++ b/dss.c
@@ -531,17 +531,25 @@ static struct snapshot *find_outdated_snapshot(struct snapshot_list *sl)
 
 static struct snapshot *find_oldest_removable_snapshot(struct snapshot_list *sl)
 {
-	int i;
-	struct snapshot *s;
+	int i, num_complete;
+	struct snapshot *s, *ref = NULL;
+
+	num_complete = num_complete_snapshots(sl);
+	if (num_complete <= conf.min_complete_arg)
+		return NULL;
 	FOR_EACH_SNAPSHOT(s, i, sl) {
 		if (snapshot_is_being_created(s))
 			continue;
-		if (is_reference_snapshot(s))
+		if (is_reference_snapshot(s)) { /* avoid this one */
+			ref = s;
 			continue;
+		}
 		DSS_INFO_LOG(("oldest removable snapshot: %s\n", s->name));
 		return s;
 	}
-	return NULL;
+	assert(ref);
+	DSS_WARNING_LOG(("removing reference snapshot %s\n", ref->name));
+	return ref;
 }
 
 static int rename_incomplete_snapshot(int64_t start)
@@ -1038,6 +1046,13 @@ static int handle_sighup(void)
 	return change_to_dest_dir();
 }
 
+static void kill_children(void)
+{
+	restart_create_process();
+	dss_kill(create_pid, SIGTERM, NULL);
+	dss_kill(remove_pid, SIGTERM, NULL);
+}
+
 static int handle_signal(void)
 {
 	int sig, ret = next_signal();
@@ -1048,9 +1063,7 @@ static int handle_signal(void)
 	switch (sig) {
 	case SIGINT:
 	case SIGTERM:
-		restart_create_process();
-		dss_kill(create_pid, SIGTERM, NULL);
-		dss_kill(remove_pid, SIGTERM, NULL);
+		kill_children();
 		ret = -E_SIGNAL;
 		break;
 	case SIGHUP:
@@ -1319,6 +1332,7 @@ static int com_run(void)
 	ret = select_loop();
 	if (ret >= 0) /* impossible */
 		ret = -E_BUG;
+	kill_children();
 	exit_hook(ret);
 	return ret;
 }