2015-05-27 16:15:14 -04:00
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package hcsshim
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import (
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"fmt"
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"syscall"
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"unsafe"
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"github.com/Sirupsen/logrus"
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)
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2015-08-27 18:46:00 -04:00
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// DestroyLayer will remove the on-disk files representing the layer with the given
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// id, including that layer's containing folder, if any.
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2015-05-27 16:15:14 -04:00
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func DestroyLayer(info DriverInfo, id string) error {
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title := "hcsshim::DestroyLayer "
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logrus.Debugf(title+"Flavour %s ID %s", info.Flavour, id)
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// Load the DLL and get a handle to the procedure we need
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dll, proc, err := loadAndFind(procDestroyLayer)
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if dll != nil {
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defer dll.Release()
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}
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if err != nil {
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return err
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}
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// Convert id to uint16 pointer for calling the procedure
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idp, err := syscall.UTF16PtrFromString(id)
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if err != nil {
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err = fmt.Errorf(title+" - Failed conversion of id %s to pointer %s", id, err)
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logrus.Error(err)
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return err
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}
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// Convert info to API calling convention
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infop, err := convertDriverInfo(info)
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if err != nil {
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err = fmt.Errorf(title+" - Failed conversion info struct %s", err)
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logrus.Error(err)
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return err
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}
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// Call the procedure itself.
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r1, _, _ := proc.Call(
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uintptr(unsafe.Pointer(&infop)),
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uintptr(unsafe.Pointer(idp)))
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use(unsafe.Pointer(&infop))
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use(unsafe.Pointer(idp))
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if r1 != 0 {
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err = fmt.Errorf(title+" - Win32 API call returned error r1=%d err=%s id=%s flavour=%d",
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r1, syscall.Errno(r1), id, info.Flavour)
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logrus.Error(err)
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return err
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}
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logrus.Debugf(title+" - succeeded id=%s flavour=%d", id, info.Flavour)
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return nil
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}
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