storage: keep a reference to lxc_rootfs in lxc_storage

src/lxc/storage/storage.c

@@ -598,14 +598,13 @@ struct lxc_storage *storage_init(struct lxc_conf *conf)
 	if (!q)
 		return NULL;
 
-	bdev = malloc(sizeof(struct lxc_storage));
+	bdev = zalloc(sizeof(struct lxc_storage));
 	if (!bdev)
 		return NULL;
 
-	memset(bdev, 0, sizeof(struct lxc_storage));
-
-	bdev->ops = q->ops;
-	bdev->type = q->name;
+	bdev->ops	= q->ops;
+	bdev->type	= q->name;
+	bdev->rootfs	= &conf->rootfs;
 
 	if (mntopts)
 		bdev->mntopts = strdup(mntopts);

src/lxc/storage/storage.h

@@ -15,6 +15,7 @@
 #endif
 
 #include "compiler.h"
+#include "conf.h"
 
 #ifndef MS_DIRSYNC
 #define MS_DIRSYNC 128
@@ -87,6 +88,7 @@ struct lxc_storage {
 	/* index for the connected nbd device. */
 	int nbd_idx;
 	int flags;
+	struct lxc_rootfs *rootfs;
 };
 
 /**