Add type definitions for block & single file CIMs

CimFS now supports a new format for storing CIMs, named BlockCIM.
A block CIM format can store the entire CIM on a block device (like a VHD) or a file
formatted like a block device.
This commit adds a Go wrapper for the new  CimFS CreateImage2 API that allows creation of
CIMs in these new formats. Some new flags required when creating and mounting these CIMs
are also added.
Lastly, a new type has been introduced to represent these new formats of CIM in our
codebase.

Signed-off-by: Amit Barve <[email protected]>

internal/hcs/schema2/cim_mount.go → internal/hcs/schema2/cimfs.go

@@ -15,6 +15,18 @@ const (
 	CimMountFlagEnableDax    uint32 = 0x2
 	CimMountFlagCacheFiles   uint32 = 0x4
 	CimMountFlagCacheRegions uint32 = 0x8
+	CimMountBlockDeviceCim   uint32 = 0x10
+	CimMountSingleFileCim    uint32 = 0x20
+
+	CimCreateFlagNone                uint32 = 0x0
+	CimCreateFlagDoNotExpandPEImages uint32 = 0x1
+	CimCreateFlagFixedSizeChunks     uint32 = 0x2
+	CimCreateFlagBlockDeviceCim      uint32 = 0x4
+	CimCreateFlagSingleFileCim       uint32 = 0x8
+
+	CimMergeFlagNone        uint32 = 0x0
+	CimMergeFlagSingleFile  uint32 = 0x1
+	CimMergeFlagBlockDevice uint32 = 0x2
 )
 
 type CimMount struct {

internal/winapi/cimfs.go

@@ -32,11 +32,17 @@ type CimFsFileMetadata struct {
 	EACount            uint32
 }
 
+type CimFsImagePath struct {
+	ImageDir  *uint16
+	ImageName *uint16
+}
+
 //sys CimMountImage(imagePath string, fsName string, flags uint32, volumeID *g) (hr error) = cimfs.CimMountImage?
 //sys CimDismountImage(volumeID *g) (hr error) = cimfs.CimDismountImage?
 
 //sys CimCreateImage(imagePath string, oldFSName *uint16, newFSName *uint16, cimFSHandle *FsHandle) (hr error) = cimfs.CimCreateImage?
-//sys CimCloseImage(cimFSHandle FsHandle) = cimfs.CimCloseImage?
+//sys CimCreateImage2(imagePath string, flags uint32, oldFSName *uint16, newFSName *uint16, cimFSHandle *FsHandle) (hr error) = cimfs.CimCreateImage2?
+//sys CimCloseImage(cimFSHandle FsHandle) = cimfs.CimCloseImage
 //sys CimCommitImage(cimFSHandle FsHandle) (hr error) = cimfs.CimCommitImage?
 
 //sys CimCreateFile(cimFSHandle FsHandle, path string, file *CimFsFileMetadata, cimStreamHandle *StreamHandle) (hr error) = cimfs.CimCreateFile?
@@ -45,3 +51,6 @@ type CimFsFileMetadata struct {
 //sys CimDeletePath(cimFSHandle FsHandle, path string) (hr error) = cimfs.CimDeletePath?
 //sys CimCreateHardLink(cimFSHandle FsHandle, newPath string, oldPath string) (hr error) = cimfs.CimCreateHardLink?
 //sys CimCreateAlternateStream(cimFSHandle FsHandle, path string, size uint64, cimStreamHandle *StreamHandle) (hr error) = cimfs.CimCreateAlternateStream?
+//sys CimAddFsToMergedImage(cimFSHandle FsHandle, path string) (hr error) = cimfs.CimAddFsToMergedImage?
+//sys CimAddFsToMergedImage2(cimFSHandle FsHandle, path string, flags uint32) (hr error) = cimfs.CimAddFsToMergedImage2?
+//sys CimMergeMountImage(numCimPaths uint32, backingImagePaths *CimFsImagePath, flags uint32, volumeID *g) (hr error) = cimfs.CimMergeMountImage?