package hcs import ( "context" "io" "syscall" "github.com/Microsoft/go-winio" diskutil "github.com/Microsoft/go-winio/vhd" "github.com/pkg/errors" "golang.org/x/sys/windows" ) // makeOpenFiles calls winio.MakeOpenFile for each handle in a slice but closes all the handles // if there is an error. func makeOpenFiles(hs []syscall.Handle) (_ []io.ReadWriteCloser, err error) { fs := make([]io.ReadWriteCloser, len(hs)) for i, h := range hs { if h != syscall.Handle(0) { if err == nil { fs[i], err = winio.MakeOpenFile(h) } if err != nil { syscall.Close(h) } } } if err != nil { for _, f := range fs { if f != nil { f.Close() } } return nil, err } return fs, nil } // creates a VHD formatted with NTFS of size `sizeGB` at the given `vhdPath`. func CreateNTFSVHD(ctx context.Context, vhdPath string, sizeGB uint32) (err error) { if err := diskutil.CreateVhdx(vhdPath, sizeGB, 1); err != nil { return errors.Wrap(err, "failed to create VHD") } vhd, err := diskutil.OpenVirtualDisk(vhdPath, diskutil.VirtualDiskAccessNone, diskutil.OpenVirtualDiskFlagNone) if err != nil { return errors.Wrap(err, "failed to open VHD") } defer func() { err2 := windows.CloseHandle(windows.Handle(vhd)) if err == nil { err = errors.Wrap(err2, "failed to close VHD") } }() if err := hcsFormatWritableLayerVhd(uintptr(vhd)); err != nil { return errors.Wrap(err, "failed to format VHD") } return nil }