cleanup pod after nobody use pod data

Signed-off-by: Gao feng <omarapazanadi@gmail.com>

src/exec.c

@@ -524,6 +524,7 @@ int hyper_release_exec(struct hyper_exec *exec,
 		/* stop pod, should not restart container */
 		if (pod->type == STOPPOD) {
 			hyper_send_type(ctl.chan.fd, ACK);
+			hyper_cleanup_pod(pod);
 			return 0;
 		}
 
@@ -531,7 +532,7 @@ int hyper_release_exec(struct hyper_exec *exec,
 		if (pod->policy == POLICY_NEVER ||
 		   ((pod->policy == POLICY_ONFAILURE) && pod->code == 0)) {
 			hyper_send_finish(pod);
-			//hyper_shutdown(pod);
+			hyper_cleanup_pod(pod);
 			return 0;
 		}
 

src/hyper.h

@@ -88,6 +88,7 @@ int hyper_mkdir(char *hyper_path);
 int hyper_open_serial(char *tty);
 struct hyper_container *hyper_find_container(struct hyper_pod *pod, char *id);
 int hyper_start_containers(struct hyper_pod *pod);
+void hyper_cleanup_pod(struct hyper_pod *pod);
 
 extern struct hyper_pod global_pod;
 extern struct hyper_ctl ctl;

src/init.c

@@ -911,6 +911,12 @@ out:
 	return ret;
 }
 
+static void hyper_cleanup_hostname(struct hyper_pod *pod)
+{
+	free(pod->hostname);
+	pod->hostname = NULL;
+}
+
 static void hyper_cleanup_shared(struct hyper_pod *pod)
 {
 	if (pod->tag == NULL) {
@@ -919,6 +925,7 @@ static void hyper_cleanup_shared(struct hyper_pod *pod)
 	}
 
 	free(pod->tag);
+	pod->tag = NULL;
 	if (umount("/tmp/hyper/shared") < 0 &&
 	    umount2("/tmp/hyper/shared", MNT_DETACH)) {
 		perror("fail to umount 9p dir");
@@ -931,6 +938,16 @@ static void hyper_cleanup_shared(struct hyper_pod *pod)
 	sync();
 }
 
+void hyper_cleanup_pod(struct hyper_pod *pod)
+{
+	hyper_cleanup_exec(pod);
+	hyper_cleanup_container(pod);
+	hyper_cleanup_network(pod);
+	hyper_cleanup_shared(pod);
+	hyper_cleanup_dns(pod);
+	hyper_cleanup_hostname(pod);
+}
+
 static int hyper_stop_pod(struct hyper_pod *pod)
 {
 	fprintf(stdout, "hyper_stop_pod init_pid %d\n", pod->init_pid);
@@ -940,16 +957,7 @@ static int hyper_stop_pod(struct hyper_pod *pod)
 	}
 
 	pod->init_pid = 0;
-
 	hyper_term_all(pod);
-	hyper_cleanup_exec(pod);
-	hyper_cleanup_container(pod);
-	hyper_cleanup_network(pod);
-	hyper_cleanup_dns(pod);
-	hyper_cleanup_shared(pod);
-
-	free(pod->hostname);
-
 	return 0;
 }
 

src/net.c

@@ -869,8 +869,17 @@ out:
 
 void hyper_cleanup_dns(struct hyper_pod *pod)
 {
-	int fd = open("/tmp/hyper/resolv.conf", O_WRONLY| O_TRUNC);
+	int fd, i;
 
+	for (i = 0; i < pod->d_num; i++) {
+		free(pod->dns[i]);
+	}
+
+	free(pod->dns);
+	pod->dns = NULL;
+	pod->d_num = 0;
+
+	fd = open("/tmp/hyper/resolv.conf", O_WRONLY| O_TRUNC);
 	if (fd < 0) {
 		perror("open /tmp/hyper/resolv.conf failed");
 		return;