#unconditional
FS_XFLAG_REALTIME
FS_XFLAG_PREALLOC
FS_XFLAG_IMMUTABLE
FS_XFLAG_APPEND
FS_XFLAG_SYNC
FS_XFLAG_NOATIME
FS_XFLAG_NODUMP
FS_XFLAG_RTINHERIT
FS_XFLAG_PROJINHERIT
FS_XFLAG_NOSYMLINKS
FS_XFLAG_EXTSIZE
FS_XFLAG_EXTSZINHERIT
FS_XFLAG_NODEFRAG
FS_XFLAG_FILESTREAM
FS_XFLAG_DAX
FS_XFLAG_COWEXTSIZE
FS_XFLAG_HASATTR