https://manpages.ubuntu.com/manpages/resolute/man2/ioctl_fsmap.2.html
Ubuntu Manpage: ioctl_fsmap, FS_IOC_GETFSMAP - retrieve the physical layout of the filesystem
retrieve the physical layout of the filesystem
https://manpages.ubuntu.com/manpages/questing/man2/FS_IOC_GETFSMAP.2const.html
Ubuntu Manpage: ioctl_fsmap, FS_IOC_GETFSMAP - retrieve the physical layout of the filesystem
retrieve the physical layout of the filesystem