Ceph » CephFS

The tool cannot properly recover if a fs has extra data pools. We need access to all data pools on `scan_extents` step to "accumulate inode metadata".

One way to fix it would be to call cephfs-data-scan scan_extents sequentially for all pools. It does not work currently, because we call accumulate_inode_metadata on the scanned pool why we should call it on the first data pool.

There is other way to fix though: allow to provide the list of all data pools to scan_extents command. This approach seems more preferable to me, because actually we may make the data pool arguments optional, allowing the tool to autodetect it.