Function mount_composefs_image 

pub fn mount_composefs_image(
    sysroot: &OwnedFd,
    name: &str,
    insecure: bool,
) -> Result<OwnedFd>

Prepares a floating mount for composefs and returns the fd

Arguments

• sysroot - fd for /sysroot
• name - Name of the EROFS image to be mounted
• insecure - Whether fsverity is optional or not