/usr/include/ is in libgfal2-dev 2.3.0-4+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gfal2/
/usr/include/gfal2/fdesc/
/usr/include/gfal2/fdesc/gfal_file_handle.h
/usr/include/gfal2/gfal_api.h
/usr/include/gfal2/g_config_manager/
/usr/include/gfal2/g_config_manager/g_config_manager.h
/usr/include/gfal2/posix/
/usr/include/gfal2/posix/gfal_posix_api.h
/usr/include/gfal2/transfer/
/usr/include/gfal2/transfer/gfal_transfer_types.h
/usr/include/gfal2/transfer/gfal_transfer_plugins.h
/usr/include/gfal2/transfer/gfal_transfer.h
/usr/include/gfal2/gfal_plugins_api.h
/usr/include/gfal2/config/
/usr/include/gfal2/config/gfal_config.h
/usr/include/gfal2/common/
/usr/include/gfal2/common/gfal_prototypes.h
/usr/include/gfal2/common/gfal_constants.h
/usr/include/gfal2/common/gfal_types.h
/usr/include/gfal2/common/gfal_common_plugin_interface.h
/usr/include/gfal2/common/gfal_common_plugin.h
/usr/include/gfal2/logger/
/usr/include/gfal2/logger/gfal_logger.h
/usr/include/gfal2/cancel/
/usr/include/gfal2/cancel/gfal_cancel.h
/usr/include/gfal2/global/
/usr/include/gfal2/global/gfal_global.h
/usr/include/gfal2/file/
/usr/include/gfal2/file/gfal_file_api.h