Function set_features 

pub fn set_features(
    fd: BorrowedFd<'_>,
    flags: &FeatureFlags,
    mask: &FeatureFlags,
) -> Result<()>

Set or clear feature flags on the filesystem.

The flags argument specifies the desired values, and mask specifies which bits to change. Only bits set in mask are modified: they are set to the corresponding value in flags. Bits not in the mask are left unchanged.

Use get_supported_features first to check which flags can be safely set or cleared at runtime.

Requires CAP_SYS_ADMIN. Returns EPERM without it.