Description of filesystem configuration options

Configuration option = Default value	Description
[glance_store]
filesystem_store_datadir = None	(StrOpt) Directory to which the Filesystem backend store writes images.
filesystem_store_datadirs = None	(MultiStrOpt) List of directories and its priorities to which the Filesystem backend store writes images.
filesystem_store_file_perm = 0	(IntOpt) The required permission for created image file. In this way the user other service used, e.g. Nova, who consumes the image could be the exclusive member of the group that owns the files created. Assigning it less then or equal to zero means don't change the default permission of the file. This value will be decoded as an octal digit.
filesystem_store_metadata_file = None	(StrOpt) The path to a file which contains the metadata to be returned with any location associated with this store. The file must contain a valid JSON object. The object should contain the keys 'id' and 'mountpoint'. The value for both keys should be 'string'.