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Add Go wrappers for Get/SetVirtualDiskInformation win32 APIs

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SetVirtualDiskInformation API is required for running confidential windows containers. The
VHDs used for starting confidential pods/UVMs need to have a specific disk
identifier. These newly added APIs will be used when preparing the VHDs for confidential
pods.

Signed-off-by: Amit <ambarve@microsoft.com>
This commit is contained in:
Amit
2025-10-27 09:08:22 -07:00
committed by Amit Barve
parent fd34511314
commit ad3df93bed
3 changed files with 182 additions and 0 deletions
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vhd/zvhd_windows.go
+18
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@@ -42,8 +42,10 @@ var (
procAttachVirtualDisk = modvirtdisk.NewProc("AttachVirtualDisk")
procCreateVirtualDisk = modvirtdisk.NewProc("CreateVirtualDisk")
procDetachVirtualDisk = modvirtdisk.NewProc("DetachVirtualDisk")
procGetVirtualDiskInformation = modvirtdisk.NewProc("GetVirtualDiskInformation")
procGetVirtualDiskPhysicalPath = modvirtdisk.NewProc("GetVirtualDiskPhysicalPath")
procOpenVirtualDisk = modvirtdisk.NewProc("OpenVirtualDisk")
procSetVirtualDiskInformation = modvirtdisk.NewProc("SetVirtualDiskInformation")
)
func attachVirtualDisk(handle syscall.Handle, securityDescriptor *uintptr, attachVirtualDiskFlag uint32, providerSpecificFlags uint32, parameters *AttachVirtualDiskParameters, overlapped *syscall.Overlapped) (win32err error) {
@@ -79,6 +81,14 @@ func detachVirtualDisk(handle syscall.Handle, detachVirtualDiskFlags uint32, pro
return
}
func getVirtualDiskInformation(handle syscall.Handle, bufferSize *uint32, info *virtualDiskInfo, sizeUsed *uint32) (win32err error) {
r0, _, _ := syscall.SyscallN(procGetVirtualDiskInformation.Addr(), uintptr(handle), uintptr(unsafe.Pointer(bufferSize)), uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(sizeUsed)))
if r0 != 0 {
win32err = syscall.Errno(r0)
}
return
}
func getVirtualDiskPhysicalPath(handle syscall.Handle, diskPathSizeInBytes *uint32, buffer *uint16) (win32err error) {
r0, _, _ := syscall.SyscallN(procGetVirtualDiskPhysicalPath.Addr(), uintptr(handle), uintptr(unsafe.Pointer(diskPathSizeInBytes)), uintptr(unsafe.Pointer(buffer)))
if r0 != 0 {
@@ -103,3 +113,11 @@ func _openVirtualDisk(virtualStorageType *VirtualStorageType, path *uint16, virt
}
return
}
func setVirtualDiskInformation(handle syscall.Handle, info *virtualDiskInfo) (win32err error) {
r0, _, _ := syscall.SyscallN(procSetVirtualDiskInformation.Addr(), uintptr(handle), uintptr(unsafe.Pointer(info)))
if r0 != 0 {
win32err = syscall.Errno(r0)
}
return
}