Function RemoveVolatileOption

core/mount/temp.go:84–106

RemoveVolatileOption copies and remove the volatile option for overlay type, since overlayfs doesn't allow to mount again using the same upper/work dirs. REF: https://docs.kernel.org/filesystems/overlayfs.html#volatile-mount TODO: Make this logic conditional once the kernel supports reusing overla

(mounts []Mount)

// TODO: Make this logic conditional once the kernel supports reusing
// overlayfs volatile mounts.
func RemoveVolatileOption(mounts []Mount) []Mount {
	var out []Mount
	for i, m := range mounts {
		if m.Type != "overlay" {
			continue
		}
		for j, opt := range m.Options {
			if opt == "volatile" || opt == "fsync=volatile" {
				if out == nil {
					out = copyMounts(mounts)
				}
				out[i].Options = append(out[i].Options[:j], out[i].Options[j+1:]...)
				break
			}
		}
	}

	if out != nil {
		return out
	}

	return mounts
}

// RemoveIDMapOption copies and removes the uidmap/gidmap options on any of the mounts using it.
func RemoveIDMapOption(mounts []Mount) []Mount {