storage: add arg to create_snapshot()

src/lxc/bdev/bdev.c

@@ -436,7 +436,7 @@ struct bdev *bdev_copy(struct lxc_container *c0, const char *cname,
 	if (!strcmp(orig->type, "btrfs") && !strcmp(new->type, "btrfs")) {
 		bool bret = false;
 		if (snap || btrfs_same_fs(orig->dest, new->dest) == 0)
-			bret = new->ops->create_snapshot(c0->lxc_conf, orig, new);
+			bret = new->ops->create_snapshot(c0->lxc_conf, orig, new, 0);
 		else
 			bret = new->ops->create_clone(c0->lxc_conf, orig, new, 0);
 		if (!bret)

src/lxc/bdev/bdev.h

@@ -76,7 +76,7 @@ struct bdev_ops {
 	bool (*create_clone)(struct lxc_conf *conf, struct bdev *orig,
 			     struct bdev *new, uint64_t newsize);
 	bool (*create_snapshot)(struct lxc_conf *conf, struct bdev *orig,
-				struct bdev *new);
+				struct bdev *new, uint64_t newsize);
 	bool can_snapshot;
 	bool can_backup;
 };

src/lxc/bdev/lxcbtrfs.c

@@ -464,7 +464,7 @@ bool btrfs_create_clone(struct lxc_conf *conf, struct bdev *orig,
 }
 
 bool btrfs_create_snapshot(struct lxc_conf *conf, struct bdev *orig,
-			   struct bdev *new)
+			   struct bdev *new, uint64_t newsize)
 {
 	int ret;
 

src/lxc/bdev/lxcbtrfs.h

@@ -416,6 +416,6 @@ int btrfs_snapshot_wrapper(void *data);
 bool btrfs_create_clone(struct lxc_conf *conf, struct bdev *orig,
 			struct bdev *new, uint64_t newsize);
 bool btrfs_create_snapshot(struct lxc_conf *conf, struct bdev *orig,
-			   struct bdev *new);
+			   struct bdev *new, uint64_t newsize);
 
 #endif // __LXC_BTRFS_H