Update the Ext3 converter

The main changes in this patch are adding chunk handing and data relocation
ability. In the last step of conversion, the converter relocates data in system
chunk and move chunk tree into system chunk. In the rollback process, the
converter remove chunk tree from system chunk and copy data back.

Regards
YZ
---

1 files changed, 2 insertions, 1 deletions

diff --git a/volumes.c b/volumes.c
index d3eeaf93..0a9ee02c 100644
--- a/volumes.c
+++ b/volumes.c
@@ -148,7 +148,8 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
 
 	list_for_each(cur, head) {
 		device = list_entry(cur, struct btrfs_device, dev_list);
-		device->fd = 0;
+		close(device->fd);
+		device->fd = -1;
 	}
 	return 0;
 }